source/lib/util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Samba utility functions
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Jeremy Allison 2001-2007
   6    Copyright (C) Simo Sorce 2001
   7    Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
   8    Copyright (C) James Peach 2006
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25
  26 extern char *global_clobber_region_function;
  27 extern unsigned int global_clobber_region_line;
  28
  29 /* Max allowable allococation - 256mb - 0x10000000 */
  30 #define MAX_ALLOC_SIZE (1024*1024*256)
  31
  32 #if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))
  33 #ifdef WITH_NISPLUS_HOME
  34 #ifdef BROKEN_NISPLUS_INCLUDE_FILES
  35 /*
  36  * The following lines are needed due to buggy include files
  37  * in Solaris 2.6 which define GROUP in both /usr/include/sys/acl.h and
  38  * also in /usr/include/rpcsvc/nis.h. The definitions conflict. JRA.
  39  * Also GROUP_OBJ is defined as 0x4 in /usr/include/sys/acl.h and as
  40  * an enum in /usr/include/rpcsvc/nis.h.
  41  */
  42
  43 #if defined(GROUP)
  44 #undef GROUP
  45 #endif
  46
  47 #if defined(GROUP_OBJ)
  48 #undef GROUP_OBJ
  49 #endif
  50
  51 #endif /* BROKEN_NISPLUS_INCLUDE_FILES */
  52
  53 #include <rpcsvc/nis.h>
  54
  55 #endif /* WITH_NISPLUS_HOME */
  56 #endif /* HAVE_NETGROUP && WITH_AUTOMOUNT */
  57
  58 enum protocol_types Protocol = PROTOCOL_COREPLUS;
  59
  60 /* this is used by the chaining code */
  61 int chain_size = 0;
  62
  63 int trans_num = 0;
  64
  65 static enum remote_arch_types ra_type = RA_UNKNOWN;
  66
  67 /***********************************************************************
  68  Definitions for all names.
  69 ***********************************************************************/
  70
  71 static char *smb_myname;
  72 static char *smb_myworkgroup;
  73 static char *smb_scope;
  74 static int smb_num_netbios_names;
  75 static char **smb_my_netbios_names;
  76
  77 /***********************************************************************
  78  Allocate and set myname. Ensure upper case.
  79 ***********************************************************************/
  80
  81 bool set_global_myname(const char *myname)
  82 {
  83         SAFE_FREE(smb_myname);
  84         smb_myname = SMB_STRDUP(myname);
  85         if (!smb_myname)
  86                 return False;
  87         strupper_m(smb_myname);
  88         return True;
  89 }
  90
  91 const char *global_myname(void)
  92 {
  93         return smb_myname;
  94 }
  95
  96 /***********************************************************************
  97  Allocate and set myworkgroup. Ensure upper case.
  98 ***********************************************************************/
  99
 100 bool set_global_myworkgroup(const char *myworkgroup)
 101 {
 102         SAFE_FREE(smb_myworkgroup);
 103         smb_myworkgroup = SMB_STRDUP(myworkgroup);
 104         if (!smb_myworkgroup)
 105                 return False;
 106         strupper_m(smb_myworkgroup);
 107         return True;
 108 }
 109
 110 const char *lp_workgroup(void)
 111 {
 112         return smb_myworkgroup;
 113 }
 114
 115 /***********************************************************************
 116  Allocate and set scope. Ensure upper case.
 117 ***********************************************************************/
 118
 119 bool set_global_scope(const char *scope)
 120 {
 121         SAFE_FREE(smb_scope);
 122         smb_scope = SMB_STRDUP(scope);
 123         if (!smb_scope)
 124                 return False;
 125         strupper_m(smb_scope);
 126         return True;
 127 }
 128
 129 /*********************************************************************
 130  Ensure scope is never null string.
 131 *********************************************************************/
 132
 133 const char *global_scope(void)
 134 {
 135         if (!smb_scope)
 136                 set_global_scope("");
 137         return smb_scope;
 138 }
 139
 140 static void free_netbios_names_array(void)
 141 {
 142         int i;
 143
 144         for (i = 0; i < smb_num_netbios_names; i++)
 145                 SAFE_FREE(smb_my_netbios_names[i]);
 146
 147         SAFE_FREE(smb_my_netbios_names);
 148         smb_num_netbios_names = 0;
 149 }
 150
 151 static bool allocate_my_netbios_names_array(size_t number)
 152 {
 153         free_netbios_names_array();
 154
 155         smb_num_netbios_names = number + 1;
 156         smb_my_netbios_names = SMB_MALLOC_ARRAY( char *, smb_num_netbios_names );
 157
 158         if (!smb_my_netbios_names)
 159                 return False;
 160
 161         memset(smb_my_netbios_names, '\0', sizeof(char *) * smb_num_netbios_names);
 162         return True;
 163 }
 164
 165 static bool set_my_netbios_names(const char *name, int i)
 166 {
 167         SAFE_FREE(smb_my_netbios_names[i]);
 168
 169         smb_my_netbios_names[i] = SMB_STRDUP(name);
 170         if (!smb_my_netbios_names[i])
 171                 return False;
 172         strupper_m(smb_my_netbios_names[i]);
 173         return True;
 174 }
 175
 176 /***********************************************************************
 177  Free memory allocated to global objects
 178 ***********************************************************************/
 179
 180 void gfree_names(void)
 181 {
 182         SAFE_FREE( smb_myname );
 183         SAFE_FREE( smb_myworkgroup );
 184         SAFE_FREE( smb_scope );
 185         free_netbios_names_array();
 186         free_local_machine_name();
 187 }
 188
 189 void gfree_all( void )
 190 {
 191         gfree_names();
 192         gfree_loadparm();
 193         gfree_case_tables();
 194         gfree_charcnv();
 195         gfree_interfaces();
 196         gfree_debugsyms();
 197 }
 198
 199 const char *my_netbios_names(int i)
 200 {
 201         return smb_my_netbios_names[i];
 202 }
 203
 204 bool set_netbios_aliases(const char **str_array)
 205 {
 206         size_t namecount;
 207
 208         /* Work out the max number of netbios aliases that we have */
 209         for( namecount=0; str_array && (str_array[namecount] != NULL); namecount++ )
 210                 ;
 211
 212         if ( global_myname() && *global_myname())
 213                 namecount++;
 214
 215         /* Allocate space for the netbios aliases */
 216         if (!allocate_my_netbios_names_array(namecount))
 217                 return False;
 218
 219         /* Use the global_myname string first */
 220         namecount=0;
 221         if ( global_myname() && *global_myname()) {
 222                 set_my_netbios_names( global_myname(), namecount );
 223                 namecount++;
 224         }
 225
 226         if (str_array) {
 227                 size_t i;
 228                 for ( i = 0; str_array[i] != NULL; i++) {
 229                         size_t n;
 230                         bool duplicate = False;
 231
 232                         /* Look for duplicates */
 233                         for( n=0; n<namecount; n++ ) {
 234                                 if( strequal( str_array[i], my_netbios_names(n) ) ) {
 235                                         duplicate = True;
 236                                         break;
 237                                 }
 238                         }
 239                         if (!duplicate) {
 240                                 if (!set_my_netbios_names(str_array[i], namecount))
 241                                         return False;
 242                                 namecount++;
 243                         }
 244                 }
 245         }
 246         return True;
 247 }
 248
 249 /****************************************************************************
 250   Common name initialization code.
 251 ****************************************************************************/
 252
 253 bool init_names(void)
 254 {
 255         int n;
 256
 257         if (global_myname() == NULL || *global_myname() == '\0') {
 258                 if (!set_global_myname(myhostname())) {
 259                         DEBUG( 0, ( "init_structs: malloc fail.\n" ) );
 260                         return False;
 261                 }
 262         }
 263
 264         if (!set_netbios_aliases(lp_netbios_aliases())) {
 265                 DEBUG( 0, ( "init_structs: malloc fail.\n" ) );
 266                 return False;
 267         }
 268
 269         set_local_machine_name(global_myname(),false);
 270
 271         DEBUG( 5, ("Netbios name list:-\n") );
 272         for( n=0; my_netbios_names(n); n++ ) {
 273                 DEBUGADD( 5, ("my_netbios_names[%d]=\"%s\"\n",
 274                                         n, my_netbios_names(n) ) );
 275         }
 276
 277         return( True );
 278 }
 279
 280 /**************************************************************************n
 281   Code to cope with username/password auth options from the commandline.
 282   Used mainly in client tools.
 283 ****************************************************************************/
 284
 285 static struct user_auth_info cmdline_auth_info = {
 286         NULL,   /* username */
 287         NULL,   /* password */
 288         false,  /* got_pass */
 289         false,  /* use_kerberos */
 290         Undefined, /* signing state */
 291         false,  /* smb_encrypt */
 292         false   /* use machine account */
 293 };
 294
 295 const char *get_cmdline_auth_info_username(void)
 296 {
 297         if (!cmdline_auth_info.username) {
 298                 return "";
 299         }
 300         return cmdline_auth_info.username;
 301 }
 302
 303 void set_cmdline_auth_info_username(const char *username)
 304 {
 305         SAFE_FREE(cmdline_auth_info.username);
 306         cmdline_auth_info.username = SMB_STRDUP(username);
 307         if (!cmdline_auth_info.username) {
 308                 exit(ENOMEM);
 309         }
 310 }
 311
 312 const char *get_cmdline_auth_info_password(void)
 313 {
 314         if (!cmdline_auth_info.password) {
 315                 return "";
 316         }
 317         return cmdline_auth_info.password;
 318 }
 319
 320 void set_cmdline_auth_info_password(const char *password)
 321 {
 322         SAFE_FREE(cmdline_auth_info.password);
 323         cmdline_auth_info.password = SMB_STRDUP(password);
 324         if (!cmdline_auth_info.password) {
 325                 exit(ENOMEM);
 326         }
 327         cmdline_auth_info.got_pass = true;
 328 }
 329
 330 bool set_cmdline_auth_info_signing_state(const char *arg)
 331 {
 332         cmdline_auth_info.signing_state = -1;
 333         if (strequal(arg, "off") || strequal(arg, "no") ||
 334                         strequal(arg, "false")) {
 335                 cmdline_auth_info.signing_state = false;
 336         } else if (strequal(arg, "on") || strequal(arg, "yes") ||
 337                         strequal(arg, "true") || strequal(arg, "auto")) {
 338                 cmdline_auth_info.signing_state = true;
 339         } else if (strequal(arg, "force") || strequal(arg, "required") ||
 340                         strequal(arg, "forced")) {
 341                 cmdline_auth_info.signing_state = Required;
 342         } else {
 343                 return false;
 344         }
 345         return true;
 346 }
 347
 348 int get_cmdline_auth_info_signing_state(void)
 349 {
 350         return cmdline_auth_info.signing_state;
 351 }
 352
 353 bool get_cmdline_auth_info_use_kerberos(void)
 354 {
 355         return cmdline_auth_info.use_kerberos;
 356 }
 357
 358 /* This should only be used by lib/popt_common.c JRA */
 359 void set_cmdline_auth_info_use_krb5_ticket(void)
 360 {
 361         cmdline_auth_info.use_kerberos = true;
 362         cmdline_auth_info.got_pass = true;
 363 }
 364
 365 /* This should only be used by lib/popt_common.c JRA */
 366 void set_cmdline_auth_info_smb_encrypt(void)
 367 {
 368         cmdline_auth_info.smb_encrypt = true;
 369 }
 370
 371 void set_cmdline_auth_info_use_machine_account(void)
 372 {
 373         cmdline_auth_info.use_machine_account = true;
 374 }
 375
 376 bool get_cmdline_auth_info_got_pass(void)
 377 {
 378         return cmdline_auth_info.got_pass;
 379 }
 380
 381 bool get_cmdline_auth_info_smb_encrypt(void)
 382 {
 383         return cmdline_auth_info.smb_encrypt;
 384 }
 385
 386 bool get_cmdline_auth_info_use_machine_account(void)
 387 {
 388         return cmdline_auth_info.use_machine_account;
 389 }
 390
 391 bool get_cmdline_auth_info_copy(struct user_auth_info *info)
 392 {
 393         *info = cmdline_auth_info;
 394         /* Now re-alloc the strings. */
 395         info->username = SMB_STRDUP(get_cmdline_auth_info_username());
 396         info->password = SMB_STRDUP(get_cmdline_auth_info_password());
 397         if (!info->username || !info->password) {
 398                 return false;
 399         }
 400         return true;
 401 }
 402
 403 bool set_cmdline_auth_info_machine_account_creds(void)
 404 {
 405         char *pass = NULL;
 406         char *account = NULL;
 407
 408         if (!get_cmdline_auth_info_use_machine_account()) {
 409                 return false;
 410         }
 411
 412         if (!secrets_init()) {
 413                 d_printf("ERROR: Unable to open secrets database\n");
 414                 return false;
 415         }
 416
 417         if (asprintf(&account, "%s$@%s", global_myname(), lp_realm()) < 0) {
 418                 return false;
 419         }
 420
 421         pass = secrets_fetch_machine_password(lp_workgroup(), NULL, NULL);
 422         if (!pass) {
 423                 d_printf("ERROR: Unable to fetch machine password for "
 424                         "%s in domain %s\n",
 425                         account, lp_workgroup());
 426                 SAFE_FREE(account);
 427                 return false;
 428         }
 429
 430         set_cmdline_auth_info_username(account);
 431         set_cmdline_auth_info_password(pass);
 432
 433         SAFE_FREE(account);
 434         SAFE_FREE(pass);
 435
 436         return true;
 437 }
 438
 439 /**************************************************************************n
 440  Find a suitable temporary directory. The result should be copied immediately
 441  as it may be overwritten by a subsequent call.
 442 ****************************************************************************/
 443
 444 const char *tmpdir(void)
 445 {
 446         char *p;
 447         if ((p = getenv("TMPDIR")))
 448                 return p;
 449         return "/tmp";
 450 }
 451
 452 /****************************************************************************
 453  Add a gid to an array of gids if it's not already there.
 454 ****************************************************************************/
 455
 456 bool add_gid_to_array_unique(TALLOC_CTX *mem_ctx, gid_t gid,
 457                              gid_t **gids, size_t *num_gids)
 458 {
 459         int i;
 460
 461         if ((*num_gids != 0) && (*gids == NULL)) {
 462                 /*
 463                  * A former call to this routine has failed to allocate memory
 464                  */
 465                 return False;
 466         }
 467
 468         for (i=0; i<*num_gids; i++) {
 469                 if ((*gids)[i] == gid) {
 470                         return True;
 471                 }
 472         }
 473
 474         *gids = TALLOC_REALLOC_ARRAY(mem_ctx, *gids, gid_t, *num_gids+1);
 475         if (*gids == NULL) {
 476                 *num_gids = 0;
 477                 return False;
 478         }
 479
 480         (*gids)[*num_gids] = gid;
 481         *num_gids += 1;
 482         return True;
 483 }
 484
 485 /****************************************************************************
 486  Like atoi but gets the value up to the separator character.
 487 ****************************************************************************/
 488
 489 static const char *Atoic(const char *p, int *n, const char *c)
 490 {
 491         if (!isdigit((int)*p)) {
 492                 DEBUG(5, ("Atoic: malformed number\n"));
 493                 return NULL;
 494         }
 495
 496         (*n) = atoi(p);
 497
 498         while ((*p) && isdigit((int)*p))
 499                 p++;
 500
 501         if (strchr_m(c, *p) == NULL) {
 502                 DEBUG(5, ("Atoic: no separator characters (%s) not found\n", c));
 503                 return NULL;
 504         }
 505
 506         return p;
 507 }
 508
 509 /*************************************************************************
 510  Reads a list of numbers.
 511  *************************************************************************/
 512
 513 const char *get_numlist(const char *p, uint32 **num, int *count)
 514 {
 515         int val;
 516
 517         if (num == NULL || count == NULL)
 518                 return NULL;
 519
 520         (*count) = 0;
 521         (*num  ) = NULL;
 522
 523         while ((p = Atoic(p, &val, ":,")) != NULL && (*p) != ':') {
 524                 *num = SMB_REALLOC_ARRAY((*num), uint32, (*count)+1);
 525                 if (!(*num)) {
 526                         return NULL;
 527                 }
 528                 (*num)[(*count)] = val;
 529                 (*count)++;
 530                 p++;
 531         }
 532
 533         return p;
 534 }
 535
 536 /*******************************************************************
 537  Check if a file exists - call vfs_file_exist for samba files.
 538 ********************************************************************/
 539
 540 bool file_exist(const char *fname,SMB_STRUCT_STAT *sbuf)
 541 {
 542         SMB_STRUCT_STAT st;
 543         if (!sbuf)
 544                 sbuf = &st;
 545
 546         if (sys_stat(fname,sbuf) != 0)
 547                 return(False);
 548
 549         return((S_ISREG(sbuf->st_mode)) || (S_ISFIFO(sbuf->st_mode)));
 550 }
 551
 552 /*******************************************************************
 553  Check if a unix domain socket exists - call vfs_file_exist for samba files.
 554 ********************************************************************/
 555
 556 bool socket_exist(const char *fname)
 557 {
 558         SMB_STRUCT_STAT st;
 559         if (sys_stat(fname,&st) != 0)
 560                 return(False);
 561
 562         return S_ISSOCK(st.st_mode);
 563 }
 564
 565 /*******************************************************************
 566  Check a files mod time.
 567 ********************************************************************/
 568
 569 time_t file_modtime(const char *fname)
 570 {
 571         SMB_STRUCT_STAT st;
 572
 573         if (sys_stat(fname,&st) != 0)
 574                 return(0);
 575
 576         return(st.st_mtime);
 577 }
 578
 579 /*******************************************************************
 580  Check if a directory exists.
 581 ********************************************************************/
 582
 583 bool directory_exist(char *dname,SMB_STRUCT_STAT *st)
 584 {
 585         SMB_STRUCT_STAT st2;
 586         bool ret;
 587
 588         if (!st)
 589                 st = &st2;
 590
 591         if (sys_stat(dname,st) != 0)
 592                 return(False);
 593
 594         ret = S_ISDIR(st->st_mode);
 595         if(!ret)
 596                 errno = ENOTDIR;
 597         return ret;
 598 }
 599
 600 /*******************************************************************
 601  Returns the size in bytes of the named file.
 602 ********************************************************************/
 603
 604 SMB_OFF_T get_file_size(char *file_name)
 605 {
 606         SMB_STRUCT_STAT buf;
 607         buf.st_size = 0;
 608         if(sys_stat(file_name,&buf) != 0)
 609                 return (SMB_OFF_T)-1;
 610         return(buf.st_size);
 611 }
 612
 613 /*******************************************************************
 614  Return a string representing an attribute for a file.
 615 ********************************************************************/
 616
 617 char *attrib_string(uint16 mode)
 618 {
 619         fstring attrstr;
 620
 621         attrstr[0] = 0;
 622
 623         if (mode & aVOLID) fstrcat(attrstr,"V");
 624         if (mode & aDIR) fstrcat(attrstr,"D");
 625         if (mode & aARCH) fstrcat(attrstr,"A");
 626         if (mode & aHIDDEN) fstrcat(attrstr,"H");
 627         if (mode & aSYSTEM) fstrcat(attrstr,"S");
 628         if (mode & aRONLY) fstrcat(attrstr,"R");
 629
 630         return talloc_strdup(talloc_tos(), attrstr);
 631 }
 632
 633 /*******************************************************************
 634  Show a smb message structure.
 635 ********************************************************************/
 636
 637 void show_msg(char *buf)
 638 {
 639         int i;
 640         int bcc=0;
 641
 642         if (!DEBUGLVL(5))
 643                 return;
 644
 645         DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n",
 646                         smb_len(buf),
 647                         (int)CVAL(buf,smb_com),
 648                         (int)CVAL(buf,smb_rcls),
 649                         (int)CVAL(buf,smb_reh),
 650                         (int)SVAL(buf,smb_err),
 651                         (int)CVAL(buf,smb_flg),
 652                         (int)SVAL(buf,smb_flg2)));
 653         DEBUGADD(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\n",
 654                         (int)SVAL(buf,smb_tid),
 655                         (int)SVAL(buf,smb_pid),
 656                         (int)SVAL(buf,smb_uid),
 657                         (int)SVAL(buf,smb_mid)));
 658         DEBUGADD(5,("smt_wct=%d\n",(int)CVAL(buf,smb_wct)));
 659
 660         for (i=0;i<(int)CVAL(buf,smb_wct);i++)
 661                 DEBUGADD(5,("smb_vwv[%2d]=%5d (0x%X)\n",i,
 662                         SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i)));
 663
 664         bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct)));
 665
 666         DEBUGADD(5,("smb_bcc=%d\n",bcc));
 667
 668         if (DEBUGLEVEL < 10)
 669                 return;
 670
 671         if (DEBUGLEVEL < 50)
 672                 bcc = MIN(bcc, 512);
 673
 674         dump_data(10, (uint8 *)smb_buf(buf), bcc);
 675 }
 676
 677 /*******************************************************************
 678  Set the length and marker of an encrypted smb packet.
 679 ********************************************************************/
 680
 681 void smb_set_enclen(char *buf,int len,uint16 enc_ctx_num)
 682 {
 683         _smb_setlen(buf,len);
 684
 685         SCVAL(buf,4,0xFF);
 686         SCVAL(buf,5,'E');
 687         SSVAL(buf,6,enc_ctx_num);
 688 }
 689
 690 /*******************************************************************
 691  Set the length and marker of an smb packet.
 692 ********************************************************************/
 693
 694 void smb_setlen(char *buf,int len)
 695 {
 696         _smb_setlen(buf,len);
 697
 698         SCVAL(buf,4,0xFF);
 699         SCVAL(buf,5,'S');
 700         SCVAL(buf,6,'M');
 701         SCVAL(buf,7,'B');
 702 }
 703
 704 /*******************************************************************
 705  Setup only the byte count for a smb message.
 706 ********************************************************************/
 707
 708 int set_message_bcc(char *buf,int num_bytes)
 709 {
 710         int num_words = CVAL(buf,smb_wct);
 711         SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
 712         _smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
 713         return (smb_size + num_words*2 + num_bytes);
 714 }
 715
 716 /*******************************************************************
 717  Add a data blob to the end of a smb_buf, adjusting bcc and smb_len.
 718  Return the bytes added
 719 ********************************************************************/
 720
 721 ssize_t message_push_blob(uint8 **outbuf, DATA_BLOB blob)
 722 {
 723         size_t newlen = smb_len(*outbuf) + 4 + blob.length;
 724         uint8 *tmp;
 725
 726         if (!(tmp = TALLOC_REALLOC_ARRAY(NULL, *outbuf, uint8, newlen))) {
 727                 DEBUG(0, ("talloc failed\n"));
 728                 return -1;
 729         }
 730         *outbuf = tmp;
 731
 732         memcpy(tmp + smb_len(tmp) + 4, blob.data, blob.length);
 733         set_message_bcc((char *)tmp, smb_buflen(tmp) + blob.length);
 734         return blob.length;
 735 }
 736
 737 /*******************************************************************
 738  Reduce a file name, removing .. elements.
 739 ********************************************************************/
 740
 741 static char *dos_clean_name(TALLOC_CTX *ctx, const char *s)
 742 {
 743         char *p = NULL;
 744         char *str = NULL;
 745
 746         DEBUG(3,("dos_clean_name [%s]\n",s));
 747
 748         /* remove any double slashes */
 749         str = talloc_all_string_sub(ctx, s, "\\\\", "\\");
 750         if (!str) {
 751                 return NULL;
 752         }
 753
 754         /* Remove leading .\\ characters */
 755         if(strncmp(str, ".\\", 2) == 0) {
 756                 trim_string(str, ".\\", NULL);
 757                 if(*str == 0) {
 758                         str = talloc_strdup(ctx, ".\\");
 759                         if (!str) {
 760                                 return NULL;
 761                         }
 762                 }
 763         }
 764
 765         while ((p = strstr_m(str,"\\..\\")) != NULL) {
 766                 char *s1;
 767
 768                 *p = 0;
 769                 s1 = p+3;
 770
 771                 if ((p=strrchr_m(str,'\\')) != NULL) {
 772                         *p = 0;
 773                 } else {
 774                         *str = 0;
 775                 }
 776                 str = talloc_asprintf(ctx,
 777                                 "%s%s",
 778                                 str,
 779                                 s1);
 780                 if (!str) {
 781                         return NULL;
 782                 }
 783         }
 784
 785         trim_string(str,NULL,"\\..");
 786         return talloc_all_string_sub(ctx, str, "\\.\\", "\\");
 787 }
 788
 789 /*******************************************************************
 790  Reduce a file name, removing .. elements.
 791 ********************************************************************/
 792
 793 char *unix_clean_name(TALLOC_CTX *ctx, const char *s)
 794 {
 795         char *p = NULL;
 796         char *str = NULL;
 797
 798         DEBUG(3,("unix_clean_name [%s]\n",s));
 799
 800         /* remove any double slashes */
 801         str = talloc_all_string_sub(ctx, s, "//","/");
 802         if (!str) {
 803                 return NULL;
 804         }
 805
 806         /* Remove leading ./ characters */
 807         if(strncmp(str, "./", 2) == 0) {
 808                 trim_string(str, "./", NULL);
 809                 if(*str == 0) {
 810                         str = talloc_strdup(ctx, "./");
 811                         if (!str) {
 812                                 return NULL;
 813                         }
 814                 }
 815         }
 816
 817         while ((p = strstr_m(str,"/../")) != NULL) {
 818                 char *s1;
 819
 820                 *p = 0;
 821                 s1 = p+3;
 822
 823                 if ((p=strrchr_m(str,'/')) != NULL) {
 824                         *p = 0;
 825                 } else {
 826                         *str = 0;
 827                 }
 828                 str = talloc_asprintf(ctx,
 829                                 "%s%s",
 830                                 str,
 831                                 s1);
 832                 if (!str) {
 833                         return NULL;
 834                 }
 835         }
 836
 837         trim_string(str,NULL,"/..");
 838         return talloc_all_string_sub(ctx, str, "/./", "/");
 839 }
 840
 841 char *clean_name(TALLOC_CTX *ctx, const char *s)
 842 {
 843         char *str = dos_clean_name(ctx, s);
 844         if (!str) {
 845                 return NULL;
 846         }
 847         return unix_clean_name(ctx, str);
 848 }
 849
 850 /*******************************************************************
 851  Close the low 3 fd's and open dev/null in their place.
 852 ********************************************************************/
 853
 854 void close_low_fds(bool stderr_too)
 855 {
 856 #ifndef VALGRIND
 857         int fd;
 858         int i;
 859
 860         close(0);
 861         close(1);
 862
 863         if (stderr_too)
 864                 close(2);
 865
 866         /* try and use up these file descriptors, so silly
 867                 library routines writing to stdout etc won't cause havoc */
 868         for (i=0;i<3;i++) {
 869                 if (i == 2 && !stderr_too)
 870                         continue;
 871
 872                 fd = sys_open("/dev/null",O_RDWR,0);
 873                 if (fd < 0)
 874                         fd = sys_open("/dev/null",O_WRONLY,0);
 875                 if (fd < 0) {
 876                         DEBUG(0,("Can't open /dev/null\n"));
 877                         return;
 878                 }
 879                 if (fd != i) {
 880                         DEBUG(0,("Didn't get file descriptor %d\n",i));
 881                         return;
 882                 }
 883         }
 884 #endif
 885 }
 886
 887 /*******************************************************************
 888  Write data into an fd at a given offset. Ignore seek errors.
 889 ********************************************************************/
 890
 891 ssize_t write_data_at_offset(int fd, const char *buffer, size_t N, SMB_OFF_T pos)
 892 {
 893         size_t total=0;
 894         ssize_t ret;
 895
 896         if (pos == (SMB_OFF_T)-1) {
 897                 return write_data(fd, buffer, N);
 898         }
 899 #if defined(HAVE_PWRITE) || defined(HAVE_PRWITE64)
 900         while (total < N) {
 901                 ret = sys_pwrite(fd,buffer + total,N - total, pos);
 902                 if (ret == -1 && errno == ESPIPE) {
 903                         return write_data(fd, buffer + total,N - total);
 904                 }
 905                 if (ret == -1) {
 906                         DEBUG(0,("write_data_at_offset: write failure. Error = %s\n", strerror(errno) ));
 907                         return -1;
 908                 }
 909                 if (ret == 0) {
 910                         return total;
 911                 }
 912                 total += ret;
 913                 pos += ret;
 914         }
 915         return (ssize_t)total;
 916 #else
 917         /* Use lseek and write_data. */
 918         if (sys_lseek(fd, pos, SEEK_SET) == -1) {
 919                 if (errno != ESPIPE) {
 920                         return -1;
 921                 }
 922         }
 923         return write_data(fd, buffer, N);
 924 #endif
 925 }
 926
 927 /****************************************************************************
 928  Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
 929  else
 930   if SYSV use O_NDELAY
 931   if BSD use FNDELAY
 932 ****************************************************************************/
 933
 934 int set_blocking(int fd, bool set)
 935 {
 936         int val;
 937 #ifdef O_NONBLOCK
 938 #define FLAG_TO_SET O_NONBLOCK
 939 #else
 940 #ifdef SYSV
 941 #define FLAG_TO_SET O_NDELAY
 942 #else /* BSD */
 943 #define FLAG_TO_SET FNDELAY
 944 #endif
 945 #endif
 946
 947         if((val = sys_fcntl_long(fd, F_GETFL, 0)) == -1)
 948                 return -1;
 949         if(set) /* Turn blocking on - ie. clear nonblock flag */
 950                 val &= ~FLAG_TO_SET;
 951         else
 952                 val |= FLAG_TO_SET;
 953         return sys_fcntl_long( fd, F_SETFL, val);
 954 #undef FLAG_TO_SET
 955 }
 956
 957 /*******************************************************************
 958  Sleep for a specified number of milliseconds.
 959 ********************************************************************/
 960
 961 void smb_msleep(unsigned int t)
 962 {
 963 #if defined(HAVE_NANOSLEEP)
 964         struct timespec tval;
 965         int ret;
 966
 967         tval.tv_sec = t/1000;
 968         tval.tv_nsec = 1000000*(t%1000);
 969
 970         do {
 971                 errno = 0;
 972                 ret = nanosleep(&tval, &tval);
 973         } while (ret < 0 && errno == EINTR && (tval.tv_sec > 0 || tval.tv_nsec > 0));
 974 #else
 975         unsigned int tdiff=0;
 976         struct timeval tval,t1,t2;
 977         fd_set fds;
 978
 979         GetTimeOfDay(&t1);
 980         t2 = t1;
 981
 982         while (tdiff < t) {
 983                 tval.tv_sec = (t-tdiff)/1000;
 984                 tval.tv_usec = 1000*((t-tdiff)%1000);
 985
 986                 /* Never wait for more than 1 sec. */
 987                 if (tval.tv_sec > 1) {
 988                         tval.tv_sec = 1;
 989                         tval.tv_usec = 0;
 990                 }
 991
 992                 FD_ZERO(&fds);
 993                 errno = 0;
 994                 sys_select_intr(0,&fds,NULL,NULL,&tval);
 995
 996                 GetTimeOfDay(&t2);
 997                 if (t2.tv_sec < t1.tv_sec) {
 998                         /* Someone adjusted time... */
 999                         t1 = t2;
1000                 }
1001
1002                 tdiff = TvalDiff(&t1,&t2);
1003         }
1004 #endif
1005 }
1006
1007 /****************************************************************************
1008  Become a daemon, discarding the controlling terminal.
1009 ****************************************************************************/
1010
1011 void become_daemon(bool Fork, bool no_process_group)
1012 {
1013         if (Fork) {
1014                 if (sys_fork()) {
1015                         _exit(0);
1016                 }
1017         }
1018
1019   /* detach from the terminal */
1020 #ifdef HAVE_SETSID
1021         if (!no_process_group) setsid();
1022 #elif defined(TIOCNOTTY)
1023         if (!no_process_group) {
1024                 int i = sys_open("/dev/tty", O_RDWR, 0);
1025                 if (i != -1) {
1026                         ioctl(i, (int) TIOCNOTTY, (char *)0);
1027                         close(i);
1028                 }
1029         }
1030 #endif /* HAVE_SETSID */
1031
1032         /* Close fd's 0,1,2. Needed if started by rsh */
1033         close_low_fds(False);  /* Don't close stderr, let the debug system
1034                                   attach it to the logfile */
1035 }
1036
1037 bool reinit_after_fork(struct messaging_context *msg_ctx,
1038                        bool parent_longlived)
1039 {
1040         NTSTATUS status;
1041
1042         /* Reset the state of the random
1043          * number generation system, so
1044          * children do not get the same random
1045          * numbers as each other */
1046         set_need_random_reseed();
1047
1048         /* tdb needs special fork handling */
1049         if (tdb_reopen_all(parent_longlived ? 1 : 0) == -1) {
1050                 DEBUG(0,("tdb_reopen_all failed.\n"));
1051                 return false;
1052         }
1053
1054         /*
1055          * For clustering, we need to re-init our ctdbd connection after the
1056          * fork
1057          */
1058         status = messaging_reinit(msg_ctx);
1059         if (!NT_STATUS_IS_OK(status)) {
1060                 DEBUG(0,("messaging_reinit() failed: %s\n",
1061                          nt_errstr(status)));
1062                 return false;
1063         }
1064
1065         return true;
1066 }
1067
1068 /****************************************************************************
1069  Put up a yes/no prompt.
1070 ****************************************************************************/
1071
1072 bool yesno(const char *p)
1073 {
1074         char ans[20];
1075         printf("%s",p);
1076
1077         if (!fgets(ans,sizeof(ans)-1,stdin))
1078                 return(False);
1079
1080         if (*ans == 'y' || *ans == 'Y')
1081                 return(True);
1082
1083         return(False);
1084 }
1085
1086 #if defined(PARANOID_MALLOC_CHECKER)
1087
1088 /****************************************************************************
1089  Internal malloc wrapper. Externally visible.
1090 ****************************************************************************/
1091
1092 void *malloc_(size_t size)
1093 {
1094         if (size == 0) {
1095                 return NULL;
1096         }
1097 #undef malloc
1098         return malloc(size);
1099 #define malloc(s) __ERROR_DONT_USE_MALLOC_DIRECTLY
1100 }
1101
1102 /****************************************************************************
1103  Internal calloc wrapper. Not externally visible.
1104 ****************************************************************************/
1105
1106 static void *calloc_(size_t count, size_t size)
1107 {
1108         if (size == 0 || count == 0) {
1109                 return NULL;
1110         }
1111 #undef calloc
1112         return calloc(count, size);
1113 #define calloc(n,s) __ERROR_DONT_USE_CALLOC_DIRECTLY
1114 }
1115
1116 /****************************************************************************
1117  Internal realloc wrapper. Not externally visible.
1118 ****************************************************************************/
1119
1120 static void *realloc_(void *ptr, size_t size)
1121 {
1122 #undef realloc
1123         return realloc(ptr, size);
1124 #define realloc(p,s) __ERROR_DONT_USE_RELLOC_DIRECTLY
1125 }
1126
1127 #endif /* PARANOID_MALLOC_CHECKER */
1128
1129 /****************************************************************************
1130  Type-safe malloc.
1131 ****************************************************************************/
1132
1133 void *malloc_array(size_t el_size, unsigned int count)
1134 {
1135         if (count >= MAX_ALLOC_SIZE/el_size) {
1136                 return NULL;
1137         }
1138
1139         if (el_size == 0 || count == 0) {
1140                 return NULL;
1141         }
1142 #if defined(PARANOID_MALLOC_CHECKER)
1143         return malloc_(el_size*count);
1144 #else
1145         return malloc(el_size*count);
1146 #endif
1147 }
1148
1149 /****************************************************************************
1150  Type-safe memalign
1151 ****************************************************************************/
1152
1153 void *memalign_array(size_t el_size, size_t align, unsigned int count)
1154 {
1155         if (count >= MAX_ALLOC_SIZE/el_size) {
1156                 return NULL;
1157         }
1158
1159         return sys_memalign(align, el_size*count);
1160 }
1161
1162 /****************************************************************************
1163  Type-safe calloc.
1164 ****************************************************************************/
1165
1166 void *calloc_array(size_t size, size_t nmemb)
1167 {
1168         if (nmemb >= MAX_ALLOC_SIZE/size) {
1169                 return NULL;
1170         }
1171         if (size == 0 || nmemb == 0) {
1172                 return NULL;
1173         }
1174 #if defined(PARANOID_MALLOC_CHECKER)
1175         return calloc_(nmemb, size);
1176 #else
1177         return calloc(nmemb, size);
1178 #endif
1179 }
1180
1181 /****************************************************************************
1182  Expand a pointer to be a particular size.
1183  Note that this version of Realloc has an extra parameter that decides
1184  whether to free the passed in storage on allocation failure or if the
1185  new size is zero.
1186
1187  This is designed for use in the typical idiom of :
1188
1189  p = SMB_REALLOC(p, size)
1190  if (!p) {
1191     return error;
1192  }
1193
1194  and not to have to keep track of the old 'p' contents to free later, nor
1195  to worry if the size parameter was zero. In the case where NULL is returned
1196  we guarentee that p has been freed.
1197
1198  If free later semantics are desired, then pass 'free_old_on_error' as False which
1199  guarentees that the old contents are not freed on error, even if size == 0. To use
1200  this idiom use :
1201
1202  tmp = SMB_REALLOC_KEEP_OLD_ON_ERROR(p, size);
1203  if (!tmp) {
1204     SAFE_FREE(p);
1205     return error;
1206  } else {
1207     p = tmp;
1208  }
1209
1210  Changes were instigated by Coverity error checking. JRA.
1211 ****************************************************************************/
1212
1213 void *Realloc(void *p, size_t size, bool free_old_on_error)
1214 {
1215         void *ret=NULL;
1216
1217         if (size == 0) {
1218                 if (free_old_on_error) {
1219                         SAFE_FREE(p);
1220                 }
1221                 DEBUG(2,("Realloc asked for 0 bytes\n"));
1222                 return NULL;
1223         }
1224
1225 #if defined(PARANOID_MALLOC_CHECKER)
1226         if (!p) {
1227                 ret = (void *)malloc_(size);
1228         } else {
1229                 ret = (void *)realloc_(p,size);
1230         }
1231 #else
1232         if (!p) {
1233                 ret = (void *)malloc(size);
1234         } else {
1235                 ret = (void *)realloc(p,size);
1236         }
1237 #endif
1238
1239         if (!ret) {
1240                 if (free_old_on_error && p) {
1241                         SAFE_FREE(p);
1242                 }
1243                 DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",(int)size));
1244         }
1245
1246         return(ret);
1247 }
1248
1249 /****************************************************************************
1250  Type-safe realloc.
1251 ****************************************************************************/
1252
1253 void *realloc_array(void *p, size_t el_size, unsigned int count, bool free_old_on_error)
1254 {
1255         if (count >= MAX_ALLOC_SIZE/el_size) {
1256                 if (free_old_on_error) {
1257                         SAFE_FREE(p);
1258                 }
1259                 return NULL;
1260         }
1261         return Realloc(p, el_size*count, free_old_on_error);
1262 }
1263
1264 /****************************************************************************
1265  (Hopefully) efficient array append.
1266 ****************************************************************************/
1267
1268 void add_to_large_array(TALLOC_CTX *mem_ctx, size_t element_size,
1269                         void *element, void *_array, uint32 *num_elements,
1270                         ssize_t *array_size)
1271 {
1272         void **array = (void **)_array;
1273
1274         if (*array_size < 0) {
1275                 return;
1276         }
1277
1278         if (*array == NULL) {
1279                 if (*array_size == 0) {
1280                         *array_size = 128;
1281                 }
1282
1283                 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
1284                         goto error;
1285                 }
1286
1287                 *array = TALLOC(mem_ctx, element_size * (*array_size));
1288                 if (*array == NULL) {
1289                         goto error;
1290                 }
1291         }
1292
1293         if (*num_elements == *array_size) {
1294                 *array_size *= 2;
1295
1296                 if (*array_size >= MAX_ALLOC_SIZE/element_size) {
1297                         goto error;
1298                 }
1299
1300                 *array = TALLOC_REALLOC(mem_ctx, *array,
1301                                         element_size * (*array_size));
1302
1303                 if (*array == NULL) {
1304                         goto error;
1305                 }
1306         }
1307
1308         memcpy((char *)(*array) + element_size*(*num_elements),
1309                element, element_size);
1310         *num_elements += 1;
1311
1312         return;
1313
1314  error:
1315         *num_elements = 0;
1316         *array_size = -1;
1317 }
1318
1319 /****************************************************************************
1320  Free memory, checks for NULL.
1321  Use directly SAFE_FREE()
1322  Exists only because we need to pass a function pointer somewhere --SSS
1323 ****************************************************************************/
1324
1325 void safe_free(void *p)
1326 {
1327         SAFE_FREE(p);
1328 }
1329
1330 /****************************************************************************
1331  Get my own name and IP.
1332 ****************************************************************************/
1333
1334 char *get_myname(TALLOC_CTX *ctx)
1335 {
1336         char *p;
1337         char hostname[HOST_NAME_MAX];
1338
1339         *hostname = 0;
1340
1341         /* get my host name */
1342         if (gethostname(hostname, sizeof(hostname)) == -1) {
1343                 DEBUG(0,("gethostname failed\n"));
1344                 return False;
1345         }
1346
1347         /* Ensure null termination. */
1348         hostname[sizeof(hostname)-1] = '\0';
1349
1350         /* split off any parts after an initial . */
1351         p = strchr_m(hostname,'.');
1352         if (p) {
1353                 *p = 0;
1354         }
1355
1356         return talloc_strdup(ctx, hostname);
1357 }
1358
1359 /****************************************************************************
1360  Get my own domain name, or "" if we have none.
1361 ****************************************************************************/
1362
1363 char *get_mydnsdomname(TALLOC_CTX *ctx)
1364 {
1365         const char *domname;
1366         char *p;
1367
1368         domname = get_mydnsfullname();
1369         if (!domname) {
1370                 return NULL;
1371         }
1372
1373         p = strchr_m(domname, '.');
1374         if (p) {
1375                 p++;
1376                 return talloc_strdup(ctx, p);
1377         } else {
1378                 return talloc_strdup(ctx, "");
1379         }
1380 }
1381
1382 /****************************************************************************
1383  Interpret a protocol description string, with a default.
1384 ****************************************************************************/
1385
1386 int interpret_protocol(const char *str,int def)
1387 {
1388         if (strequal(str,"NT1"))
1389                 return(PROTOCOL_NT1);
1390         if (strequal(str,"LANMAN2"))
1391                 return(PROTOCOL_LANMAN2);
1392         if (strequal(str,"LANMAN1"))
1393                 return(PROTOCOL_LANMAN1);
1394         if (strequal(str,"CORE"))
1395                 return(PROTOCOL_CORE);
1396         if (strequal(str,"COREPLUS"))
1397                 return(PROTOCOL_COREPLUS);
1398         if (strequal(str,"CORE+"))
1399                 return(PROTOCOL_COREPLUS);
1400
1401         DEBUG(0,("Unrecognised protocol level %s\n",str));
1402
1403         return(def);
1404 }
1405
1406
1407 #if (defined(HAVE_NETGROUP) && defined(WITH_AUTOMOUNT))
1408 /******************************************************************
1409  Remove any mount options such as -rsize=2048,wsize=2048 etc.
1410  Based on a fix from <Thomas.Hepper@icem.de>.
1411  Returns a malloc'ed string.
1412 *******************************************************************/
1413
1414 static char *strip_mount_options(TALLOC_CTX *ctx, const char *str)
1415 {
1416         if (*str == '-') {
1417                 const char *p = str;
1418                 while(*p && !isspace(*p))
1419                         p++;
1420                 while(*p && isspace(*p))
1421                         p++;
1422                 if(*p) {
1423                         return talloc_strdup(ctx, p);
1424                 }
1425         }
1426         return NULL;
1427 }
1428
1429 /*******************************************************************
1430  Patch from jkf@soton.ac.uk
1431  Split Luke's automount_server into YP lookup and string splitter
1432  so can easily implement automount_path().
1433  Returns a malloc'ed string.
1434 *******************************************************************/
1435
1436 #ifdef WITH_NISPLUS_HOME
1437 char *automount_lookup(TALLOC_CTX *ctx, const char *user_name)
1438 {
1439         char *value = NULL;
1440
1441         char *nis_map = (char *)lp_nis_home_map_name();
1442
1443         char buffer[NIS_MAXATTRVAL + 1];
1444         nis_result *result;
1445         nis_object *object;
1446         entry_obj  *entry;
1447
1448         snprintf(buffer, sizeof(buffer), "[key=%s],%s", user_name, nis_map);
1449         DEBUG(5, ("NIS+ querystring: %s\n", buffer));
1450
1451         if (result = nis_list(buffer, FOLLOW_PATH|EXPAND_NAME|HARD_LOOKUP, NULL, NULL)) {
1452                 if (result->status != NIS_SUCCESS) {
1453                         DEBUG(3, ("NIS+ query failed: %s\n", nis_sperrno(result->status)));
1454                 } else {
1455                         object = result->objects.objects_val;
1456                         if (object->zo_data.zo_type == ENTRY_OBJ) {
1457                                 entry = &object->zo_data.objdata_u.en_data;
1458                                 DEBUG(5, ("NIS+ entry type: %s\n", entry->en_type));
1459                                 DEBUG(3, ("NIS+ result: %s\n", entry->en_cols.en_cols_val[1].ec_value.ec_value_val));
1460
1461                                 value = talloc_strdup(ctx,
1462                                                 entry->en_cols.en_cols_val[1].ec_value.ec_value_val);
1463                                 if (!value) {
1464                                         nis_freeresult(result);
1465                                         return NULL;
1466                                 }
1467                                 value = talloc_string_sub(ctx,
1468                                                 value,
1469                                                 "&",
1470                                                 user_name);
1471                         }
1472                 }
1473         }
1474         nis_freeresult(result);
1475
1476         if (value) {
1477                 value = strip_mount_options(ctx, value);
1478                 DEBUG(4, ("NIS+ Lookup: %s resulted in %s\n",
1479                                         user_name, value));
1480         }
1481         return value;
1482 }
1483 #else /* WITH_NISPLUS_HOME */
1484
1485 char *automount_lookup(TALLOC_CTX *ctx, const char *user_name)
1486 {
1487         char *value = NULL;
1488
1489         int nis_error;        /* returned by yp all functions */
1490         char *nis_result;     /* yp_match inits this */
1491         int nis_result_len;  /* and set this */
1492         char *nis_domain;     /* yp_get_default_domain inits this */
1493         char *nis_map = (char *)lp_nis_home_map_name();
1494
1495         if ((nis_error = yp_get_default_domain(&nis_domain)) != 0) {
1496                 DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error)));
1497                 return NULL;
1498         }
1499
1500         DEBUG(5, ("NIS Domain: %s\n", nis_domain));
1501
1502         if ((nis_error = yp_match(nis_domain, nis_map, user_name,
1503                                         strlen(user_name), &nis_result,
1504                                         &nis_result_len)) == 0) {
1505                 value = talloc_strdup(ctx, nis_result);
1506                 if (!value) {
1507                         return NULL;
1508                 }
1509                 value = strip_mount_options(ctx, value);
1510         } else if(nis_error == YPERR_KEY) {
1511                 DEBUG(3, ("YP Key not found:  while looking up \"%s\" in map \"%s\"\n",
1512                                 user_name, nis_map));
1513                 DEBUG(3, ("using defaults for server and home directory\n"));
1514         } else {
1515                 DEBUG(3, ("YP Error: \"%s\" while looking up \"%s\" in map \"%s\"\n",
1516                                 yperr_string(nis_error), user_name, nis_map));
1517         }
1518
1519         if (value) {
1520                 DEBUG(4, ("YP Lookup: %s resulted in %s\n", user_name, value));
1521         }
1522         return value;
1523 }
1524 #endif /* WITH_NISPLUS_HOME */
1525 #endif
1526
1527 /****************************************************************************
1528  Check if a process exists. Does this work on all unixes?
1529 ****************************************************************************/
1530
1531 bool process_exists(const struct server_id pid)
1532 {
1533         if (procid_is_me(&pid)) {
1534                 return True;
1535         }
1536
1537         if (procid_is_local(&pid)) {
1538                 return (kill(pid.pid,0) == 0 || errno != ESRCH);
1539         }
1540
1541 #ifdef CLUSTER_SUPPORT
1542         return ctdbd_process_exists(messaging_ctdbd_connection(), pid.vnn,
1543                                     pid.pid);
1544 #else
1545         return False;
1546 #endif
1547 }
1548
1549 bool process_exists_by_pid(pid_t pid)
1550 {
1551         /* Doing kill with a non-positive pid causes messages to be
1552          * sent to places we don't want. */
1553         SMB_ASSERT(pid > 0);
1554         return(kill(pid,0) == 0 || errno != ESRCH);
1555 }
1556
1557 /*******************************************************************
1558  Convert a uid into a user name.
1559 ********************************************************************/
1560
1561 const char *uidtoname(uid_t uid)
1562 {
1563         TALLOC_CTX *ctx = talloc_tos();
1564         char *name = NULL;
1565         struct passwd *pass = NULL;
1566
1567         pass = getpwuid_alloc(ctx,uid);
1568         if (pass) {
1569                 name = talloc_strdup(ctx,pass->pw_name);
1570                 TALLOC_FREE(pass);
1571         } else {
1572                 name = talloc_asprintf(ctx,
1573                                 "%ld",
1574                                 (long int)uid);
1575         }
1576         return name;
1577 }
1578
1579 /*******************************************************************
1580  Convert a gid into a group name.
1581 ********************************************************************/
1582
1583 char *gidtoname(gid_t gid)
1584 {
1585         struct group *grp;
1586
1587         grp = getgrgid(gid);
1588         if (grp) {
1589                 return talloc_strdup(talloc_tos(), grp->gr_name);
1590         }
1591         else {
1592                 return talloc_asprintf(talloc_tos(),
1593                                         "%d",
1594                                         (int)gid);
1595         }
1596 }
1597
1598 /*******************************************************************
1599  Convert a user name into a uid.
1600 ********************************************************************/
1601
1602 uid_t nametouid(const char *name)
1603 {
1604         struct passwd *pass;
1605         char *p;
1606         uid_t u;
1607
1608         pass = getpwnam_alloc(NULL, name);
1609         if (pass) {
1610                 u = pass->pw_uid;
1611                 TALLOC_FREE(pass);
1612                 return u;
1613         }
1614
1615         u = (uid_t)strtol(name, &p, 0);
1616         if ((p != name) && (*p == '\0'))
1617                 return u;
1618
1619         return (uid_t)-1;
1620 }
1621
1622 /*******************************************************************
1623  Convert a name to a gid_t if possible. Return -1 if not a group.
1624 ********************************************************************/
1625
1626 gid_t nametogid(const char *name)
1627 {
1628         struct group *grp;
1629         char *p;
1630         gid_t g;
1631
1632         g = (gid_t)strtol(name, &p, 0);
1633         if ((p != name) && (*p == '\0'))
1634                 return g;
1635
1636         grp = sys_getgrnam(name);
1637         if (grp)
1638                 return(grp->gr_gid);
1639         return (gid_t)-1;
1640 }
1641
1642 /*******************************************************************
1643  Something really nasty happened - panic !
1644 ********************************************************************/
1645
1646 void smb_panic(const char *const why)
1647 {
1648         char *cmd;
1649         int result;
1650
1651 #ifdef DEVELOPER
1652         {
1653
1654                 if (global_clobber_region_function) {
1655                         DEBUG(0,("smb_panic: clobber_region() last called from [%s(%u)]\n",
1656                                          global_clobber_region_function,
1657                                          global_clobber_region_line));
1658                 }
1659         }
1660 #endif
1661
1662         DEBUG(0,("PANIC (pid %llu): %s\n",
1663                     (unsigned long long)sys_getpid(), why));
1664         log_stack_trace();
1665
1666         cmd = lp_panic_action();
1667         if (cmd && *cmd) {
1668                 DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmd));
1669                 result = system(cmd);
1670
1671                 if (result == -1)
1672                         DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n",
1673                                           strerror(errno)));
1674                 else
1675                         DEBUG(0, ("smb_panic(): action returned status %d\n",
1676                                           WEXITSTATUS(result)));
1677         }
1678
1679         dump_core();
1680 }
1681
1682 /*******************************************************************
1683  Print a backtrace of the stack to the debug log. This function
1684  DELIBERATELY LEAKS MEMORY. The expectation is that you should
1685  exit shortly after calling it.
1686 ********************************************************************/
1687
1688 #ifdef HAVE_LIBUNWIND_H
1689 #include <libunwind.h>
1690 #endif
1691
1692 #ifdef HAVE_EXECINFO_H
1693 #include <execinfo.h>
1694 #endif
1695
1696 #ifdef HAVE_LIBEXC_H
1697 #include <libexc.h>
1698 #endif
1699
1700 void log_stack_trace(void)
1701 {
1702 #ifdef HAVE_LIBUNWIND
1703         /* Try to use libunwind before any other technique since on ia64
1704          * libunwind correctly walks the stack in more circumstances than
1705          * backtrace.
1706          */
1707         unw_cursor_t cursor;
1708         unw_context_t uc;
1709         unsigned i = 0;
1710
1711         char procname[256];
1712         unw_word_t ip, sp, off;
1713
1714         procname[sizeof(procname) - 1] = '\0';
1715
1716         if (unw_getcontext(&uc) != 0) {
1717                 goto libunwind_failed;
1718         }
1719
1720         if (unw_init_local(&cursor, &uc) != 0) {
1721                 goto libunwind_failed;
1722         }
1723
1724         DEBUG(0, ("BACKTRACE:\n"));
1725
1726         do {
1727             ip = sp = 0;
1728             unw_get_reg(&cursor, UNW_REG_IP, &ip);
1729             unw_get_reg(&cursor, UNW_REG_SP, &sp);
1730
1731             switch (unw_get_proc_name(&cursor,
1732                         procname, sizeof(procname) - 1, &off) ) {
1733             case 0:
1734                     /* Name found. */
1735             case -UNW_ENOMEM:
1736                     /* Name truncated. */
1737                     DEBUGADD(0, (" #%u %s + %#llx [ip=%#llx] [sp=%#llx]\n",
1738                             i, procname, (long long)off,
1739                             (long long)ip, (long long) sp));
1740                     break;
1741             default:
1742             /* case -UNW_ENOINFO: */
1743             /* case -UNW_EUNSPEC: */
1744                     /* No symbol name found. */
1745                     DEBUGADD(0, (" #%u %s [ip=%#llx] [sp=%#llx]\n",
1746                             i, "<unknown symbol>",
1747                             (long long)ip, (long long) sp));
1748             }
1749             ++i;
1750         } while (unw_step(&cursor) > 0);
1751
1752         return;
1753
1754 libunwind_failed:
1755         DEBUG(0, ("unable to produce a stack trace with libunwind\n"));
1756
1757 #elif HAVE_BACKTRACE_SYMBOLS
1758         void *backtrace_stack[BACKTRACE_STACK_SIZE];
1759         size_t backtrace_size;
1760         char **backtrace_strings;
1761
1762         /* get the backtrace (stack frames) */
1763         backtrace_size = backtrace(backtrace_stack,BACKTRACE_STACK_SIZE);
1764         backtrace_strings = backtrace_symbols(backtrace_stack, backtrace_size);
1765
1766         DEBUG(0, ("BACKTRACE: %lu stack frames:\n",
1767                   (unsigned long)backtrace_size));
1768
1769         if (backtrace_strings) {
1770                 int i;
1771
1772                 for (i = 0; i < backtrace_size; i++)
1773                         DEBUGADD(0, (" #%u %s\n", i, backtrace_strings[i]));
1774
1775                 /* Leak the backtrace_strings, rather than risk what free() might do */
1776         }
1777
1778 #elif HAVE_LIBEXC
1779
1780         /* The IRIX libexc library provides an API for unwinding the stack. See
1781          * libexc(3) for details. Apparantly trace_back_stack leaks memory, but
1782          * since we are about to abort anyway, it hardly matters.
1783          */
1784
1785 #define NAMESIZE 32 /* Arbitrary */
1786
1787         __uint64_t      addrs[BACKTRACE_STACK_SIZE];
1788         char *          names[BACKTRACE_STACK_SIZE];
1789         char            namebuf[BACKTRACE_STACK_SIZE * NAMESIZE];
1790
1791         int             i;
1792         int             levels;
1793
1794         ZERO_ARRAY(addrs);
1795         ZERO_ARRAY(names);
1796         ZERO_ARRAY(namebuf);
1797
1798         /* We need to be root so we can open our /proc entry to walk
1799          * our stack. It also helps when we want to dump core.
1800          */
1801         become_root();
1802
1803         for (i = 0; i < BACKTRACE_STACK_SIZE; i++) {
1804                 names[i] = namebuf + (i * NAMESIZE);
1805         }
1806
1807         levels = trace_back_stack(0, addrs, names,
1808                         BACKTRACE_STACK_SIZE, NAMESIZE - 1);
1809
1810         DEBUG(0, ("BACKTRACE: %d stack frames:\n", levels));
1811         for (i = 0; i < levels; i++) {
1812                 DEBUGADD(0, (" #%d 0x%llx %s\n", i, addrs[i], names[i]));
1813         }
1814 #undef NAMESIZE
1815
1816 #else
1817         DEBUG(0, ("unable to produce a stack trace on this platform\n"));
1818 #endif
1819 }
1820
1821 /*******************************************************************
1822   A readdir wrapper which just returns the file name.
1823  ********************************************************************/
1824
1825 const char *readdirname(SMB_STRUCT_DIR *p)
1826 {
1827         SMB_STRUCT_DIRENT *ptr;
1828         char *dname;
1829
1830         if (!p)
1831                 return(NULL);
1832
1833         ptr = (SMB_STRUCT_DIRENT *)sys_readdir(p);
1834         if (!ptr)
1835                 return(NULL);
1836
1837         dname = ptr->d_name;
1838
1839 #ifdef NEXT2
1840         if (telldir(p) < 0)
1841                 return(NULL);
1842 #endif
1843
1844 #ifdef HAVE_BROKEN_READDIR_NAME
1845         /* using /usr/ucb/cc is BAD */
1846         dname = dname - 2;
1847 #endif
1848
1849         return talloc_strdup(talloc_tos(), dname);
1850 }
1851
1852 /*******************************************************************
1853  Utility function used to decide if the last component
1854  of a path matches a (possibly wildcarded) entry in a namelist.
1855 ********************************************************************/
1856
1857 bool is_in_path(const char *name, name_compare_entry *namelist, bool case_sensitive)
1858 {
1859         const char *last_component;
1860
1861         /* if we have no list it's obviously not in the path */
1862         if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL))) {
1863                 return False;
1864         }
1865
1866         DEBUG(8, ("is_in_path: %s\n", name));
1867
1868         /* Get the last component of the unix name. */
1869         last_component = strrchr_m(name, '/');
1870         if (!last_component) {
1871                 last_component = name;
1872         } else {
1873                 last_component++; /* Go past '/' */
1874         }
1875
1876         for(; namelist->name != NULL; namelist++) {
1877                 if(namelist->is_wild) {
1878                         if (mask_match(last_component, namelist->name, case_sensitive)) {
1879                                 DEBUG(8,("is_in_path: mask match succeeded\n"));
1880                                 return True;
1881                         }
1882                 } else {
1883                         if((case_sensitive && (strcmp(last_component, namelist->name) == 0))||
1884                                                 (!case_sensitive && (StrCaseCmp(last_component, namelist->name) == 0))) {
1885                                 DEBUG(8,("is_in_path: match succeeded\n"));
1886                                 return True;
1887                         }
1888                 }
1889         }
1890         DEBUG(8,("is_in_path: match not found\n"));
1891         return False;
1892 }
1893
1894 /*******************************************************************
1895  Strip a '/' separated list into an array of
1896  name_compare_enties structures suitable for
1897  passing to is_in_path(). We do this for
1898  speed so we can pre-parse all the names in the list
1899  and don't do it for each call to is_in_path().
1900  namelist is modified here and is assumed to be
1901  a copy owned by the caller.
1902  We also check if the entry contains a wildcard to
1903  remove a potentially expensive call to mask_match
1904  if possible.
1905 ********************************************************************/
1906
1907 void set_namearray(name_compare_entry **ppname_array, char *namelist)
1908 {
1909         char *name_end;
1910         char *nameptr = namelist;
1911         int num_entries = 0;
1912         int i;
1913
1914         (*ppname_array) = NULL;
1915
1916         if((nameptr == NULL ) || ((nameptr != NULL) && (*nameptr == '\0')))
1917                 return;
1918
1919         /* We need to make two passes over the string. The
1920                 first to count the number of elements, the second
1921                 to split it.
1922         */
1923
1924         while(*nameptr) {
1925                 if ( *nameptr == '/' ) {
1926                         /* cope with multiple (useless) /s) */
1927                         nameptr++;
1928                         continue;
1929                 }
1930                 /* find the next / */
1931                 name_end = strchr_m(nameptr, '/');
1932
1933                 /* oops - the last check for a / didn't find one. */
1934                 if (name_end == NULL)
1935                         break;
1936
1937                 /* next segment please */
1938                 nameptr = name_end + 1;
1939                 num_entries++;
1940         }
1941
1942         if(num_entries == 0)
1943                 return;
1944
1945         if(( (*ppname_array) = SMB_MALLOC_ARRAY(name_compare_entry, num_entries + 1)) == NULL) {
1946                 DEBUG(0,("set_namearray: malloc fail\n"));
1947                 return;
1948         }
1949
1950         /* Now copy out the names */
1951         nameptr = namelist;
1952         i = 0;
1953         while(*nameptr) {
1954                 if ( *nameptr == '/' ) {
1955                         /* cope with multiple (useless) /s) */
1956                         nameptr++;
1957                         continue;
1958                 }
1959                 /* find the next / */
1960                 if ((name_end = strchr_m(nameptr, '/')) != NULL)
1961                         *name_end = 0;
1962
1963                 /* oops - the last check for a / didn't find one. */
1964                 if(name_end == NULL)
1965                         break;
1966
1967                 (*ppname_array)[i].is_wild = ms_has_wild(nameptr);
1968                 if(((*ppname_array)[i].name = SMB_STRDUP(nameptr)) == NULL) {
1969                         DEBUG(0,("set_namearray: malloc fail (1)\n"));
1970                         return;
1971                 }
1972
1973                 /* next segment please */
1974                 nameptr = name_end + 1;
1975                 i++;
1976         }
1977
1978         (*ppname_array)[i].name = NULL;
1979
1980         return;
1981 }
1982
1983 /****************************************************************************
1984  Routine to free a namearray.
1985 ****************************************************************************/
1986
1987 void free_namearray(name_compare_entry *name_array)
1988 {
1989         int i;
1990
1991         if(name_array == NULL)
1992                 return;
1993
1994         for(i=0; name_array[i].name!=NULL; i++)
1995                 SAFE_FREE(name_array[i].name);
1996         SAFE_FREE(name_array);
1997 }
1998
1999 #undef DBGC_CLASS
2000 #define DBGC_CLASS DBGC_LOCKING
2001
2002 /****************************************************************************
2003  Simple routine to do POSIX file locking. Cruft in NFS and 64->32 bit mapping
2004  is dealt with in posix.c
2005  Returns True if the lock was granted, False otherwise.
2006 ****************************************************************************/
2007
2008 bool fcntl_lock(int fd, int op, SMB_OFF_T offset, SMB_OFF_T count, int type)
2009 {
2010         SMB_STRUCT_FLOCK lock;
2011         int ret;
2012
2013         DEBUG(8,("fcntl_lock fd=%d op=%d offset=%.0f count=%.0f type=%d\n",
2014                 fd,op,(double)offset,(double)count,type));
2015
2016         lock.l_type = type;
2017         lock.l_whence = SEEK_SET;
2018         lock.l_start = offset;
2019         lock.l_len = count;
2020         lock.l_pid = 0;
2021
2022         ret = sys_fcntl_ptr(fd,op,&lock);
2023
2024         if (ret == -1) {
2025                 int sav = errno;
2026                 DEBUG(3,("fcntl_lock: lock failed at offset %.0f count %.0f op %d type %d (%s)\n",
2027                         (double)offset,(double)count,op,type,strerror(errno)));
2028                 errno = sav;
2029                 return False;
2030         }
2031
2032         /* everything went OK */
2033         DEBUG(8,("fcntl_lock: Lock call successful\n"));
2034
2035         return True;
2036 }
2037
2038 /****************************************************************************
2039  Simple routine to query existing file locks. Cruft in NFS and 64->32 bit mapping
2040  is dealt with in posix.c
2041  Returns True if we have information regarding this lock region (and returns
2042  F_UNLCK in *ptype if the region is unlocked). False if the call failed.
2043 ****************************************************************************/
2044
2045 bool fcntl_getlock(int fd, SMB_OFF_T *poffset, SMB_OFF_T *pcount, int *ptype, pid_t *ppid)
2046 {
2047         SMB_STRUCT_FLOCK lock;
2048         int ret;
2049
2050         DEBUG(8,("fcntl_getlock fd=%d offset=%.0f count=%.0f type=%d\n",
2051                     fd,(double)*poffset,(double)*pcount,*ptype));
2052
2053         lock.l_type = *ptype;
2054         lock.l_whence = SEEK_SET;
2055         lock.l_start = *poffset;
2056         lock.l_len = *pcount;
2057         lock.l_pid = 0;
2058
2059         ret = sys_fcntl_ptr(fd,SMB_F_GETLK,&lock);
2060
2061         if (ret == -1) {
2062                 int sav = errno;
2063                 DEBUG(3,("fcntl_getlock: lock request failed at offset %.0f count %.0f type %d (%s)\n",
2064                         (double)*poffset,(double)*pcount,*ptype,strerror(errno)));
2065                 errno = sav;
2066                 return False;
2067         }
2068
2069         *ptype = lock.l_type;
2070         *poffset = lock.l_start;
2071         *pcount = lock.l_len;
2072         *ppid = lock.l_pid;
2073
2074         DEBUG(3,("fcntl_getlock: fd %d is returned info %d pid %u\n",
2075                         fd, (int)lock.l_type, (unsigned int)lock.l_pid));
2076         return True;
2077 }
2078
2079 #undef DBGC_CLASS
2080 #define DBGC_CLASS DBGC_ALL
2081
2082 /*******************************************************************
2083  Is the name specified one of my netbios names.
2084  Returns true if it is equal, false otherwise.
2085 ********************************************************************/
2086
2087 bool is_myname(const char *s)
2088 {
2089         int n;
2090         bool ret = False;
2091
2092         for (n=0; my_netbios_names(n); n++) {
2093                 if (strequal(my_netbios_names(n), s)) {
2094                         ret=True;
2095                         break;
2096                 }
2097         }
2098         DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret));
2099         return(ret);
2100 }
2101
2102 /*******************************************************************
2103  Is the name specified our workgroup/domain.
2104  Returns true if it is equal, false otherwise.
2105 ********************************************************************/
2106
2107 bool is_myworkgroup(const char *s)
2108 {
2109         bool ret = False;
2110
2111         if (strequal(s, lp_workgroup())) {
2112                 ret=True;
2113         }
2114
2115         DEBUG(8, ("is_myworkgroup(\"%s\") returns %d\n", s, ret));
2116         return(ret);
2117 }
2118
2119 /*******************************************************************
2120  we distinguish between 2K and XP by the "Native Lan Manager" string
2121    WinXP => "Windows 2002 5.1"
2122    WinXP 64bit => "Windows XP 5.2"
2123    Win2k => "Windows 2000 5.0"
2124    NT4   => "Windows NT 4.0"
2125    Win9x => "Windows 4.0"
2126  Windows 2003 doesn't set the native lan manager string but
2127  they do set the domain to "Windows 2003 5.2" (probably a bug).
2128 ********************************************************************/
2129
2130 void ra_lanman_string( const char *native_lanman )
2131 {
2132         if ( strcmp( native_lanman, "Windows 2002 5.1" ) == 0 )
2133                 set_remote_arch( RA_WINXP );
2134         else if ( strcmp( native_lanman, "Windows XP 5.2" ) == 0 )
2135                 set_remote_arch( RA_WINXP64 );
2136         else if ( strcmp( native_lanman, "Windows Server 2003 5.2" ) == 0 )
2137                 set_remote_arch( RA_WIN2K3 );
2138 }
2139
2140 static const char *remote_arch_str;
2141
2142 const char *get_remote_arch_str(void)
2143 {
2144         if (!remote_arch_str) {
2145                 return "UNKNOWN";
2146         }
2147         return remote_arch_str;
2148 }
2149
2150 /*******************************************************************
2151  Set the horrid remote_arch string based on an enum.
2152 ********************************************************************/
2153
2154 void set_remote_arch(enum remote_arch_types type)
2155 {
2156         ra_type = type;
2157         switch( type ) {
2158         case RA_WFWG:
2159                 remote_arch_str = "WfWg";
2160                 break;
2161         case RA_OS2:
2162                 remote_arch_str = "OS2";
2163                 break;
2164         case RA_WIN95:
2165                 remote_arch_str = "Win95";
2166                 break;
2167         case RA_WINNT:
2168                 remote_arch_str = "WinNT";
2169                 break;
2170         case RA_WIN2K:
2171                 remote_arch_str = "Win2K";
2172                 break;
2173         case RA_WINXP:
2174                 remote_arch_str = "WinXP";
2175                 break;
2176         case RA_WINXP64:
2177                 remote_arch_str = "WinXP64";
2178                 break;
2179         case RA_WIN2K3:
2180                 remote_arch_str = "Win2K3";
2181                 break;
2182         case RA_VISTA:
2183                 remote_arch_str = "Vista";
2184                 break;
2185         case RA_SAMBA:
2186                 remote_arch_str = "Samba";
2187                 break;
2188         case RA_CIFSFS:
2189                 remote_arch_str = "CIFSFS";
2190                 break;
2191         default:
2192                 ra_type = RA_UNKNOWN;
2193                 remote_arch_str = "UNKNOWN";
2194                 break;
2195         }
2196
2197         DEBUG(10,("set_remote_arch: Client arch is \'%s\'\n",
2198                                 remote_arch_str));
2199 }
2200
2201 /*******************************************************************
2202  Get the remote_arch type.
2203 ********************************************************************/
2204
2205 enum remote_arch_types get_remote_arch(void)
2206 {
2207         return ra_type;
2208 }
2209
2210 void print_asc(int level, const unsigned char *buf,int len)
2211 {
2212         int i;
2213         for (i=0;i<len;i++)
2214                 DEBUG(level,("%c", isprint(buf[i])?buf[i]:'.'));
2215 }
2216
2217 void dump_data(int level, const unsigned char *buf1,int len)
2218 {
2219         const unsigned char *buf = (const unsigned char *)buf1;
2220         int i=0;
2221         if (len<=0) return;
2222
2223         if (!DEBUGLVL(level)) return;
2224
2225         DEBUGADD(level,("[%03X] ",i));
2226         for (i=0;i<len;) {
2227                 DEBUGADD(level,("%02X ",(int)buf[i]));
2228                 i++;
2229                 if (i%8 == 0) DEBUGADD(level,(" "));
2230                 if (i%16 == 0) {
2231                         print_asc(level,&buf[i-16],8); DEBUGADD(level,(" "));
2232                         print_asc(level,&buf[i-8],8); DEBUGADD(level,("\n"));
2233                         if (i<len) DEBUGADD(level,("[%03X] ",i));
2234                 }
2235         }
2236         if (i%16) {
2237                 int n;
2238                 n = 16 - (i%16);
2239                 DEBUGADD(level,(" "));
2240                 if (n>8) DEBUGADD(level,(" "));
2241                 while (n--) DEBUGADD(level,("   "));
2242                 n = MIN(8,i%16);
2243                 print_asc(level,&buf[i-(i%16)],n); DEBUGADD(level,( " " ));
2244                 n = (i%16) - n;
2245                 if (n>0) print_asc(level,&buf[i-n],n);
2246                 DEBUGADD(level,("\n"));
2247         }
2248 }
2249
2250 void dump_data_pw(const char *msg, const uchar * data, size_t len)
2251 {
2252 #ifdef DEBUG_PASSWORD
2253         DEBUG(11, ("%s", msg));
2254         if (data != NULL && len > 0)
2255         {
2256                 dump_data(11, data, len);
2257         }
2258 #endif
2259 }
2260
2261 const char *tab_depth(int level, int depth)
2262 {
2263         if( CHECK_DEBUGLVL(level) ) {
2264                 dbgtext("%*s", depth*4, "");
2265         }
2266         return "";
2267 }
2268
2269 /*****************************************************************************
2270  Provide a checksum on a string
2271
2272  Input:  s - the null-terminated character string for which the checksum
2273              will be calculated.
2274
2275   Output: The checksum value calculated for s.
2276 *****************************************************************************/
2277
2278 int str_checksum(const char *s)
2279 {
2280         int res = 0;
2281         int c;
2282         int i=0;
2283
2284         while(*s) {
2285                 c = *s;
2286                 res ^= (c << (i % 15)) ^ (c >> (15-(i%15)));
2287                 s++;
2288                 i++;
2289         }
2290         return(res);
2291 }
2292
2293 /*****************************************************************
2294  Zero a memory area then free it. Used to catch bugs faster.
2295 *****************************************************************/
2296
2297 void zero_free(void *p, size_t size)
2298 {
2299         memset(p, 0, size);
2300         SAFE_FREE(p);
2301 }
2302
2303 /*****************************************************************
2304  Set our open file limit to a requested max and return the limit.
2305 *****************************************************************/
2306
2307 int set_maxfiles(int requested_max)
2308 {
2309 #if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE))
2310         struct rlimit rlp;
2311         int saved_current_limit;
2312
2313         if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2314                 DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n",
2315                         strerror(errno) ));
2316                 /* just guess... */
2317                 return requested_max;
2318         }
2319
2320         /*
2321          * Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to
2322          * account for the extra fd we need
2323          * as well as the log files and standard
2324          * handles etc. Save the limit we want to set in case
2325          * we are running on an OS that doesn't support this limit (AIX)
2326          * which always returns RLIM_INFINITY for rlp.rlim_max.
2327          */
2328
2329         /* Try raising the hard (max) limit to the requested amount. */
2330
2331 #if defined(RLIM_INFINITY)
2332         if (rlp.rlim_max != RLIM_INFINITY) {
2333                 int orig_max = rlp.rlim_max;
2334
2335                 if ( rlp.rlim_max < requested_max )
2336                         rlp.rlim_max = requested_max;
2337
2338                 /* This failing is not an error - many systems (Linux) don't
2339                         support our default request of 10,000 open files. JRA. */
2340
2341                 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2342                         DEBUG(3,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d max files failed with error %s\n",
2343                                 (int)rlp.rlim_max, strerror(errno) ));
2344
2345                         /* Set failed - restore original value from get. */
2346                         rlp.rlim_max = orig_max;
2347                 }
2348         }
2349 #endif
2350
2351         /* Now try setting the soft (current) limit. */
2352
2353         saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);
2354
2355         if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2356                 DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n",
2357                         (int)rlp.rlim_cur, strerror(errno) ));
2358                 /* just guess... */
2359                 return saved_current_limit;
2360         }
2361
2362         if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2363                 DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n",
2364                         strerror(errno) ));
2365                 /* just guess... */
2366                 return saved_current_limit;
2367     }
2368
2369 #if defined(RLIM_INFINITY)
2370         if(rlp.rlim_cur == RLIM_INFINITY)
2371                 return saved_current_limit;
2372 #endif
2373
2374         if((int)rlp.rlim_cur > saved_current_limit)
2375                 return saved_current_limit;
2376
2377         return rlp.rlim_cur;
2378 #else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */
2379         /*
2380          * No way to know - just guess...
2381          */
2382         return requested_max;
2383 #endif
2384 }
2385
2386 /*****************************************************************
2387  Possibly replace mkstemp if it is broken.
2388 *****************************************************************/
2389
2390 int smb_mkstemp(char *name_template)
2391 {
2392 #if HAVE_SECURE_MKSTEMP
2393         return mkstemp(name_template);
2394 #else
2395         /* have a reasonable go at emulating it. Hope that
2396            the system mktemp() isn't completly hopeless */
2397         char *p = mktemp(name_template);
2398         if (!p)
2399                 return -1;
2400         return open(p, O_CREAT|O_EXCL|O_RDWR, 0600);
2401 #endif
2402 }
2403
2404 /*****************************************************************
2405  malloc that aborts with smb_panic on fail or zero size.
2406  *****************************************************************/
2407
2408 void *smb_xmalloc_array(size_t size, unsigned int count)
2409 {
2410         void *p;
2411         if (size == 0) {
2412                 smb_panic("smb_xmalloc_array: called with zero size");
2413         }
2414         if (count >= MAX_ALLOC_SIZE/size) {
2415                 smb_panic("smb_xmalloc_array: alloc size too large");
2416         }
2417         if ((p = SMB_MALLOC(size*count)) == NULL) {
2418                 DEBUG(0, ("smb_xmalloc_array failed to allocate %lu * %lu bytes\n",
2419                         (unsigned long)size, (unsigned long)count));
2420                 smb_panic("smb_xmalloc_array: malloc failed");
2421         }
2422         return p;
2423 }
2424
2425 /**
2426  Memdup with smb_panic on fail.
2427 **/
2428
2429 void *smb_xmemdup(const void *p, size_t size)
2430 {
2431         void *p2;
2432         p2 = SMB_XMALLOC_ARRAY(unsigned char,size);
2433         memcpy(p2, p, size);
2434         return p2;
2435 }
2436
2437 /**
2438  strdup that aborts on malloc fail.
2439 **/
2440
2441 char *smb_xstrdup(const char *s)
2442 {
2443 #if defined(PARANOID_MALLOC_CHECKER)
2444 #ifdef strdup
2445 #undef strdup
2446 #endif
2447 #endif
2448
2449 #ifndef HAVE_STRDUP
2450 #define strdup rep_strdup
2451 #endif
2452
2453         char *s1 = strdup(s);
2454 #if defined(PARANOID_MALLOC_CHECKER)
2455 #ifdef strdup
2456 #undef strdup
2457 #endif
2458 #define strdup(s) __ERROR_DONT_USE_STRDUP_DIRECTLY
2459 #endif
2460         if (!s1) {
2461                 smb_panic("smb_xstrdup: malloc failed");
2462         }
2463         return s1;
2464
2465 }
2466
2467 /**
2468  strndup that aborts on malloc fail.
2469 **/
2470
2471 char *smb_xstrndup(const char *s, size_t n)
2472 {
2473 #if defined(PARANOID_MALLOC_CHECKER)
2474 #ifdef strndup
2475 #undef strndup
2476 #endif
2477 #endif
2478
2479 #if (defined(BROKEN_STRNDUP) || !defined(HAVE_STRNDUP))
2480 #undef HAVE_STRNDUP
2481 #define strndup rep_strndup
2482 #endif
2483
2484         char *s1 = strndup(s, n);
2485 #if defined(PARANOID_MALLOC_CHECKER)
2486 #ifdef strndup
2487 #undef strndup
2488 #endif
2489 #define strndup(s,n) __ERROR_DONT_USE_STRNDUP_DIRECTLY
2490 #endif
2491         if (!s1) {
2492                 smb_panic("smb_xstrndup: malloc failed");
2493         }
2494         return s1;
2495 }
2496
2497 /*
2498   vasprintf that aborts on malloc fail
2499 */
2500
2501  int smb_xvasprintf(char **ptr, const char *format, va_list ap)
2502 {
2503         int n;
2504         va_list ap2;
2505
2506         VA_COPY(ap2, ap);
2507
2508         n = vasprintf(ptr, format, ap2);
2509         if (n == -1 || ! *ptr) {
2510                 smb_panic("smb_xvasprintf: out of memory");
2511         }
2512         va_end(ap2);
2513         return n;
2514 }
2515
2516 /*****************************************************************
2517  Like strdup but for memory.
2518 *****************************************************************/
2519
2520 void *memdup(const void *p, size_t size)
2521 {
2522         void *p2;
2523         if (size == 0)
2524                 return NULL;
2525         p2 = SMB_MALLOC(size);
2526         if (!p2)
2527                 return NULL;
2528         memcpy(p2, p, size);
2529         return p2;
2530 }
2531
2532 /*****************************************************************
2533  Get local hostname and cache result.
2534 *****************************************************************/
2535
2536 char *myhostname(void)
2537 {
2538         static char *ret;
2539         if (ret == NULL) {
2540                 /* This is cached forever so
2541                  * use NULL talloc ctx. */
2542                 ret = get_myname(NULL);
2543         }
2544         return ret;
2545 }
2546
2547 /*****************************************************************
2548  A useful function for returning a path in the Samba pid directory.
2549 *****************************************************************/
2550
2551 static char *xx_path(const char *name, const char *rootpath)
2552 {
2553         char *fname = NULL;
2554
2555         fname = talloc_strdup(talloc_tos(), rootpath);
2556         if (!fname) {
2557                 return NULL;
2558         }
2559         trim_string(fname,"","/");
2560
2561         if (!directory_exist(fname,NULL)) {
2562                 mkdir(fname,0755);
2563         }
2564
2565         return talloc_asprintf(talloc_tos(),
2566                                 "%s/%s",
2567                                 fname,
2568                                 name);
2569 }
2570
2571 /*****************************************************************
2572  A useful function for returning a path in the Samba lock directory.
2573 *****************************************************************/
2574
2575 char *lock_path(const char *name)
2576 {
2577         return xx_path(name, lp_lockdir());
2578 }
2579
2580 /*****************************************************************
2581  A useful function for returning a path in the Samba pid directory.
2582 *****************************************************************/
2583
2584 char *pid_path(const char *name)
2585 {
2586         return xx_path(name, lp_piddir());
2587 }
2588
2589 /**
2590  * @brief Returns an absolute path to a file in the Samba lib directory.
2591  *
2592  * @param name File to find, relative to LIBDIR.
2593  *
2594  * @retval Pointer to a string containing the full path.
2595  **/
2596
2597 char *lib_path(const char *name)
2598 {
2599         return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_LIBDIR(), name);
2600 }
2601
2602 /**
2603  * @brief Returns an absolute path to a file in the Samba data directory.
2604  *
2605  * @param name File to find, relative to CODEPAGEDIR.
2606  *
2607  * @retval Pointer to a talloc'ed string containing the full path.
2608  **/
2609
2610 char *data_path(const char *name)
2611 {
2612         return talloc_asprintf(talloc_tos(), "%s/%s", get_dyn_CODEPAGEDIR(), name);
2613 }
2614
2615 /*****************************************************************
2616 a useful function for returning a path in the Samba state directory
2617  *****************************************************************/
2618
2619 char *state_path(const char *name)
2620 {
2621         return xx_path(name, get_dyn_STATEDIR());
2622 }
2623
2624 /**
2625  * @brief Returns the platform specific shared library extension.
2626  *
2627  * @retval Pointer to a const char * containing the extension.
2628  **/
2629
2630 const char *shlib_ext(void)
2631 {
2632         return get_dyn_SHLIBEXT();
2633 }
2634
2635 /*******************************************************************
2636  Given a filename - get its directory name
2637  NB: Returned in static storage.  Caveats:
2638  o  If caller wishes to preserve, they should copy.
2639 ********************************************************************/
2640
2641 char *parent_dirname(const char *path)
2642 {
2643         char *parent;
2644
2645         if (!parent_dirname_talloc(talloc_tos(), path, &parent, NULL)) {
2646                 return NULL;
2647         }
2648
2649         return parent;
2650 }
2651
2652 bool parent_dirname_talloc(TALLOC_CTX *mem_ctx, const char *dir,
2653                            char **parent, const char **name)
2654 {
2655         char *p;
2656         ptrdiff_t len;
2657
2658         p = strrchr_m(dir, '/'); /* Find final '/', if any */
2659
2660         if (p == NULL) {
2661                 if (!(*parent = talloc_strdup(mem_ctx, "."))) {
2662                         return False;
2663                 }
2664                 if (name) {
2665                         *name = "";
2666                 }
2667                 return True;
2668         }
2669
2670         len = p-dir;
2671
2672         if (!(*parent = TALLOC_ARRAY(mem_ctx, char, len+1))) {
2673                 return False;
2674         }
2675         memcpy(*parent, dir, len);
2676         (*parent)[len] = '\0';
2677
2678         if (name) {
2679                 *name = p+1;
2680         }
2681         return True;
2682 }
2683
2684 /*******************************************************************
2685  Determine if a pattern contains any Microsoft wildcard characters.
2686 *******************************************************************/
2687
2688 bool ms_has_wild(const char *s)
2689 {
2690         char c;
2691
2692         if (lp_posix_pathnames()) {
2693                 /* With posix pathnames no characters are wild. */
2694                 return False;
2695         }
2696
2697         while ((c = *s++)) {
2698                 switch (c) {
2699                 case '*':
2700                 case '?':
2701                 case '<':
2702                 case '>':
2703                 case '"':
2704                         return True;
2705                 }
2706         }
2707         return False;
2708 }
2709
2710 bool ms_has_wild_w(const smb_ucs2_t *s)
2711 {
2712         smb_ucs2_t c;
2713         if (!s) return False;
2714         while ((c = *s++)) {
2715                 switch (c) {
2716                 case UCS2_CHAR('*'):
2717                 case UCS2_CHAR('?'):
2718                 case UCS2_CHAR('<'):
2719                 case UCS2_CHAR('>'):
2720                 case UCS2_CHAR('"'):
2721                         return True;
2722                 }
2723         }
2724         return False;
2725 }
2726
2727 /*******************************************************************
2728  A wrapper that handles case sensitivity and the special handling
2729  of the ".." name.
2730 *******************************************************************/
2731
2732 bool mask_match(const char *string, const char *pattern, bool is_case_sensitive)
2733 {
2734         if (strcmp(string,"..") == 0)
2735                 string = ".";
2736         if (strcmp(pattern,".") == 0)
2737                 return False;
2738
2739         return ms_fnmatch(pattern, string, Protocol <= PROTOCOL_LANMAN2, is_case_sensitive) == 0;
2740 }
2741
2742 /*******************************************************************
2743  A wrapper that handles case sensitivity and the special handling
2744  of the ".." name. Varient that is only called by old search code which requires
2745  pattern translation.
2746 *******************************************************************/
2747
2748 bool mask_match_search(const char *string, const char *pattern, bool is_case_sensitive)
2749 {
2750         if (strcmp(string,"..") == 0)
2751                 string = ".";
2752         if (strcmp(pattern,".") == 0)
2753                 return False;
2754
2755         return ms_fnmatch(pattern, string, True, is_case_sensitive) == 0;
2756 }
2757
2758 /*******************************************************************
2759  A wrapper that handles a list of patters and calls mask_match()
2760  on each.  Returns True if any of the patterns match.
2761 *******************************************************************/
2762
2763 bool mask_match_list(const char *string, char **list, int listLen, bool is_case_sensitive)
2764 {
2765        while (listLen-- > 0) {
2766                if (mask_match(string, *list++, is_case_sensitive))
2767                        return True;
2768        }
2769        return False;
2770 }
2771
2772 /*********************************************************
2773  Recursive routine that is called by unix_wild_match.
2774 *********************************************************/
2775
2776 static bool unix_do_match(const char *regexp, const char *str)
2777 {
2778         const char *p;
2779
2780         for( p = regexp; *p && *str; ) {
2781
2782                 switch(*p) {
2783                         case '?':
2784                                 str++;
2785                                 p++;
2786                                 break;
2787
2788                         case '*':
2789
2790                                 /*
2791                                  * Look for a character matching
2792                                  * the one after the '*'.
2793                                  */
2794                                 p++;
2795                                 if(!*p)
2796                                         return true; /* Automatic match */
2797                                 while(*str) {
2798
2799                                         while(*str && (*p != *str))
2800                                                 str++;
2801
2802                                         /*
2803                                          * Patch from weidel@multichart.de. In the case of the regexp
2804                                          * '*XX*' we want to ensure there are at least 2 'X' characters
2805                                          * in the string after the '*' for a match to be made.
2806                                          */
2807
2808                                         {
2809                                                 int matchcount=0;
2810
2811                                                 /*
2812                                                  * Eat all the characters that match, but count how many there were.
2813                                                  */
2814
2815                                                 while(*str && (*p == *str)) {
2816                                                         str++;
2817                                                         matchcount++;
2818                                                 }
2819
2820                                                 /*
2821                                                  * Now check that if the regexp had n identical characters that
2822                                                  * matchcount had at least that many matches.
2823                                                  */
2824
2825                                                 while ( *(p+1) && (*(p+1) == *p)) {
2826                                                         p++;
2827                                                         matchcount--;
2828                                                 }
2829
2830                                                 if ( matchcount <= 0 )
2831                                                         return false;
2832                                         }
2833
2834                                         str--; /* We've eaten the match char after the '*' */
2835
2836                                         if(unix_do_match(p, str))
2837                                                 return true;
2838
2839                                         if(!*str)
2840                                                 return false;
2841                                         else
2842                                                 str++;
2843                                 }
2844                                 return false;
2845
2846                         default:
2847                                 if(*str != *p)
2848                                         return false;
2849                                 str++;
2850                                 p++;
2851                                 break;
2852                 }
2853         }
2854
2855         if(!*p && !*str)
2856                 return true;
2857
2858         if (!*p && str[0] == '.' && str[1] == 0)
2859                 return true;
2860
2861         if (!*str && *p == '?') {
2862                 while (*p == '?')
2863                         p++;
2864                 return(!*p);
2865         }
2866
2867         if(!*str && (*p == '*' && p[1] == '\0'))
2868                 return true;
2869
2870         return false;
2871 }
2872
2873 /*******************************************************************
2874  Simple case insensitive interface to a UNIX wildcard matcher.
2875  Returns True if match, False if not.
2876 *******************************************************************/
2877
2878 bool unix_wild_match(const char *pattern, const char *string)
2879 {
2880         TALLOC_CTX *ctx = talloc_stackframe();
2881         char *p2;
2882         char *s2;
2883         char *p;
2884         bool ret = false;
2885
2886         p2 = talloc_strdup(ctx,pattern);
2887         s2 = talloc_strdup(ctx,string);
2888         if (!p2 || !s2) {
2889                 TALLOC_FREE(ctx);
2890                 return false;
2891         }
2892         strlower_m(p2);
2893         strlower_m(s2);
2894
2895         /* Remove any *? and ** from the pattern as they are meaningless */
2896         for(p = p2; *p; p++) {
2897                 while( *p == '*' && (p[1] == '?' ||p[1] == '*')) {
2898                         memmove(&p[1], &p[2], strlen(&p[2])+1);
2899                 }
2900         }
2901
2902         if (strequal(p2,"*")) {
2903                 TALLOC_FREE(ctx);
2904                 return true;
2905         }
2906
2907         ret = unix_do_match(p2, s2);
2908         TALLOC_FREE(ctx);
2909         return ret;
2910 }
2911
2912 /**********************************************************************
2913  Converts a name to a fully qualified domain name.
2914  Returns true if lookup succeeded, false if not (then fqdn is set to name)
2915  Note we deliberately use gethostbyname here, not getaddrinfo as we want
2916  to examine the h_aliases and I don't know how to do that with getaddrinfo.
2917 ***********************************************************************/
2918
2919 bool name_to_fqdn(fstring fqdn, const char *name)
2920 {
2921         char *full = NULL;
2922         struct hostent *hp = gethostbyname(name);
2923
2924         if (!hp || !hp->h_name || !*hp->h_name) {
2925                 DEBUG(10,("name_to_fqdn: lookup for %s failed.\n", name));
2926                 fstrcpy(fqdn, name);
2927                 return false;
2928         }
2929
2930         /* Find out if the fqdn is returned as an alias
2931          * to cope with /etc/hosts files where the first
2932          * name is not the fqdn but the short name */
2933         if (hp->h_aliases && (! strchr_m(hp->h_name, '.'))) {
2934                 int i;
2935                 for (i = 0; hp->h_aliases[i]; i++) {
2936                         if (strchr_m(hp->h_aliases[i], '.')) {
2937                                 full = hp->h_aliases[i];
2938                                 break;
2939                         }
2940                 }
2941         }
2942         if (full && (StrCaseCmp(full, "localhost.localdomain") == 0)) {
2943                 DEBUG(1, ("WARNING: your /etc/hosts file may be broken!\n"));
2944                 DEBUGADD(1, ("    Specifing the machine hostname for address 127.0.0.1 may lead\n"));
2945                 DEBUGADD(1, ("    to Kerberos authentication problems as localhost.localdomain\n"));
2946                 DEBUGADD(1, ("    may end up being used instead of the real machine FQDN.\n"));
2947                 full = hp->h_name;
2948         }
2949         if (!full) {
2950                 full = hp->h_name;
2951         }
2952
2953         DEBUG(10,("name_to_fqdn: lookup for %s -> %s.\n", name, full));
2954         fstrcpy(fqdn, full);
2955         return true;
2956 }
2957
2958 /**********************************************************************
2959  Extension to talloc_get_type: Abort on type mismatch
2960 ***********************************************************************/
2961
2962 void *talloc_check_name_abort(const void *ptr, const char *name)
2963 {
2964         void *result;
2965
2966         result = talloc_check_name(ptr, name);
2967         if (result != NULL)
2968                 return result;
2969
2970         DEBUG(0, ("Talloc type mismatch, expected %s, got %s\n",
2971                   name, talloc_get_name(ptr)));
2972         smb_panic("talloc type mismatch");
2973         /* Keep the compiler happy */
2974         return NULL;
2975 }
2976
2977 uint32 map_share_mode_to_deny_mode(uint32 share_access, uint32 private_options)
2978 {
2979         switch (share_access & ~FILE_SHARE_DELETE) {
2980                 case FILE_SHARE_NONE:
2981                         return DENY_ALL;
2982                 case FILE_SHARE_READ:
2983                         return DENY_WRITE;
2984                 case FILE_SHARE_WRITE:
2985                         return DENY_READ;
2986                 case FILE_SHARE_READ|FILE_SHARE_WRITE:
2987                         return DENY_NONE;
2988         }
2989         if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_DOS) {
2990                 return DENY_DOS;
2991         } else if (private_options & NTCREATEX_OPTIONS_PRIVATE_DENY_FCB) {
2992                 return DENY_FCB;
2993         }
2994
2995         return (uint32)-1;
2996 }
2997
2998 pid_t procid_to_pid(const struct server_id *proc)
2999 {
3000         return proc->pid;
3001 }
3002
3003 static uint32 my_vnn = NONCLUSTER_VNN;
3004
3005 void set_my_vnn(uint32 vnn)
3006 {
3007         DEBUG(10, ("vnn pid %d = %u\n", (int)sys_getpid(), (unsigned int)vnn));
3008         my_vnn = vnn;
3009 }
3010
3011 uint32 get_my_vnn(void)
3012 {
3013         return my_vnn;
3014 }
3015
3016 struct server_id pid_to_procid(pid_t pid)
3017 {
3018         struct server_id result;
3019         result.pid = pid;
3020 #ifdef CLUSTER_SUPPORT
3021         result.vnn = my_vnn;
3022 #endif
3023         return result;
3024 }
3025
3026 struct server_id procid_self(void)
3027 {
3028         return pid_to_procid(sys_getpid());
3029 }
3030
3031 struct server_id server_id_self(void)
3032 {
3033         return procid_self();
3034 }
3035
3036 bool procid_equal(const struct server_id *p1, const struct server_id *p2)
3037 {
3038         if (p1->pid != p2->pid)
3039                 return False;
3040 #ifdef CLUSTER_SUPPORT
3041         if (p1->vnn != p2->vnn)
3042                 return False;
3043 #endif
3044         return True;
3045 }
3046
3047 bool cluster_id_equal(const struct server_id *id1,
3048                       const struct server_id *id2)
3049 {
3050         return procid_equal(id1, id2);
3051 }
3052
3053 bool procid_is_me(const struct server_id *pid)
3054 {
3055         if (pid->pid != sys_getpid())
3056                 return False;
3057 #ifdef CLUSTER_SUPPORT
3058         if (pid->vnn != my_vnn)
3059                 return False;
3060 #endif
3061         return True;
3062 }
3063
3064 struct server_id interpret_pid(const char *pid_string)
3065 {
3066 #ifdef CLUSTER_SUPPORT
3067         unsigned int vnn, pid;
3068         struct server_id result;
3069         if (sscanf(pid_string, "%u:%u", &vnn, &pid) == 2) {
3070                 result.vnn = vnn;
3071                 result.pid = pid;
3072         }
3073         else if (sscanf(pid_string, "%u", &pid) == 1) {
3074                 result.vnn = NONCLUSTER_VNN;
3075                 result.pid = pid;
3076         }
3077         else {
3078                 result.vnn = NONCLUSTER_VNN;
3079                 result.pid = -1;
3080         }
3081         return result;
3082 #else
3083         return pid_to_procid(atoi(pid_string));
3084 #endif
3085 }
3086
3087 char *procid_str(TALLOC_CTX *mem_ctx, const struct server_id *pid)
3088 {
3089 #ifdef CLUSTER_SUPPORT
3090         if (pid->vnn == NONCLUSTER_VNN) {
3091                 return talloc_asprintf(mem_ctx,
3092                                 "%d",
3093                                 (int)pid->pid);
3094         }
3095         else {
3096                 return talloc_asprintf(mem_ctx,
3097                                         "%u:%d",
3098                                         (unsigned)pid->vnn,
3099                                         (int)pid->pid);
3100         }
3101 #else
3102         return talloc_asprintf(mem_ctx,
3103                         "%d",
3104                         (int)pid->pid);
3105 #endif
3106 }
3107
3108 char *procid_str_static(const struct server_id *pid)
3109 {
3110         return procid_str(talloc_tos(), pid);
3111 }
3112
3113 bool procid_valid(const struct server_id *pid)
3114 {
3115         return (pid->pid != -1);
3116 }
3117
3118 bool procid_is_local(const struct server_id *pid)
3119 {
3120 #ifdef CLUSTER_SUPPORT
3121         return pid->vnn == my_vnn;
3122 #else
3123         return True;
3124 #endif
3125 }
3126
3127 int this_is_smp(void)
3128 {
3129 #if defined(HAVE_SYSCONF)
3130
3131 #if defined(SYSCONF_SC_NPROC_ONLN)
3132         return (sysconf(_SC_NPROC_ONLN) > 1) ? 1 : 0;
3133 #elif defined(SYSCONF_SC_NPROCESSORS_ONLN)
3134         return (sysconf(_SC_NPROCESSORS_ONLN) > 1) ? 1 : 0;
3135 #else
3136         return 0;
3137 #endif
3138
3139 #else
3140         return 0;
3141 #endif
3142 }
3143
3144 /****************************************************************
3145  Check if an offset into a buffer is safe.
3146  If this returns True it's safe to indirect into the byte at
3147  pointer ptr+off.
3148 ****************************************************************/
3149
3150 bool is_offset_safe(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3151 {
3152         const char *end_base = buf_base + buf_len;
3153         char *end_ptr = ptr + off;
3154
3155         if (!buf_base || !ptr) {
3156                 return False;
3157         }
3158
3159         if (end_base < buf_base || end_ptr < ptr) {
3160                 return False; /* wrap. */
3161         }
3162
3163         if (end_ptr < end_base) {
3164                 return True;
3165         }
3166         return False;
3167 }
3168
3169 /****************************************************************
3170  Return a safe pointer into a buffer, or NULL.
3171 ****************************************************************/
3172
3173 char *get_safe_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3174 {
3175         return is_offset_safe(buf_base, buf_len, ptr, off) ?
3176                         ptr + off : NULL;
3177 }
3178
3179 /****************************************************************
3180  Return a safe pointer into a string within a buffer, or NULL.
3181 ****************************************************************/
3182
3183 char *get_safe_str_ptr(const char *buf_base, size_t buf_len, char *ptr, size_t off)
3184 {
3185         if (!is_offset_safe(buf_base, buf_len, ptr, off)) {
3186                 return NULL;
3187         }
3188         /* Check if a valid string exists at this offset. */
3189         if (skip_string(buf_base,buf_len, ptr + off) == NULL) {
3190                 return NULL;
3191         }
3192         return ptr + off;
3193 }
3194
3195 /****************************************************************
3196  Return an SVAL at a pointer, or failval if beyond the end.
3197 ****************************************************************/
3198
3199 int get_safe_SVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
3200 {
3201         /*
3202          * Note we use off+1 here, not off+2 as SVAL accesses ptr[0] and ptr[1],
3203          * NOT ptr[2].
3204          */
3205         if (!is_offset_safe(buf_base, buf_len, ptr, off+1)) {
3206                 return failval;
3207         }
3208         return SVAL(ptr,off);
3209 }
3210
3211 /****************************************************************
3212  Return an IVAL at a pointer, or failval if beyond the end.
3213 ****************************************************************/
3214
3215 int get_safe_IVAL(const char *buf_base, size_t buf_len, char *ptr, size_t off, int failval)
3216 {
3217         /*
3218          * Note we use off+3 here, not off+4 as IVAL accesses
3219          * ptr[0] ptr[1] ptr[2] ptr[3] NOT ptr[4].
3220          */
3221         if (!is_offset_safe(buf_base, buf_len, ptr, off+3)) {
3222                 return failval;
3223         }
3224         return IVAL(ptr,off);
3225 }
3226
3227 /****************************************************************
3228  Split DOM\user into DOM and user. Do not mix with winbind variants of that
3229  call (they take care of winbind separator and other winbind specific settings).
3230 ****************************************************************/
3231
3232 void split_domain_user(TALLOC_CTX *mem_ctx,
3233                        const char *full_name,
3234                        char **domain,
3235                        char **user)
3236 {
3237         const char *p = NULL;
3238
3239         p = strchr_m(full_name, '\\');
3240
3241         if (p != NULL) {
3242                 *domain = talloc_strndup(mem_ctx, full_name,
3243                                          PTR_DIFF(p, full_name));
3244                 *user = talloc_strdup(mem_ctx, p+1);
3245         } else {
3246                 *domain = talloc_strdup(mem_ctx, "");
3247                 *user = talloc_strdup(mem_ctx, full_name);
3248         }
3249 }
3250
3251 #if 0
3252
3253 Disable these now we have checked all code paths and ensured
3254 NULL returns on zero request. JRA.
3255
3256 /****************************************************************
3257  talloc wrapper functions that guarentee a null pointer return
3258  if size == 0.
3259 ****************************************************************/
3260
3261 #ifndef MAX_TALLOC_SIZE
3262 #define MAX_TALLOC_SIZE 0x10000000
3263 #endif
3264
3265 /*
3266  *    talloc and zero memory.
3267  *    - returns NULL if size is zero.
3268  */
3269
3270 void *_talloc_zero_zeronull(const void *ctx, size_t size, const char *name)
3271 {
3272         void *p;
3273
3274         if (size == 0) {
3275                 return NULL;
3276         }
3277
3278         p = talloc_named_const(ctx, size, name);
3279
3280         if (p) {
3281                 memset(p, '\0', size);
3282         }
3283
3284         return p;
3285 }
3286
3287 /*
3288  *   memdup with a talloc.
3289  *   - returns NULL if size is zero.
3290  */
3291
3292 void *_talloc_memdup_zeronull(const void *t, const void *p, size_t size, const char *name)
3293 {
3294         void *newp;
3295
3296         if (size == 0) {
3297                 return NULL;
3298         }
3299
3300         newp = talloc_named_const(t, size, name);
3301         if (newp) {
3302                 memcpy(newp, p, size);
3303         }
3304
3305         return newp;
3306 }
3307
3308 /*
3309  *   alloc an array, checking for integer overflow in the array size.
3310  *   - returns NULL if count or el_size are zero.
3311  */
3312
3313 void *_talloc_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
3314 {
3315         if (count >= MAX_TALLOC_SIZE/el_size) {
3316                 return NULL;
3317         }
3318
3319         if (el_size == 0 || count == 0) {
3320                 return NULL;
3321         }
3322
3323         return talloc_named_const(ctx, el_size * count, name);
3324 }
3325
3326 /*
3327  *   alloc an zero array, checking for integer overflow in the array size
3328  *   - returns NULL if count or el_size are zero.
3329  */
3330
3331 void *_talloc_zero_array_zeronull(const void *ctx, size_t el_size, unsigned count, const char *name)
3332 {
3333         if (count >= MAX_TALLOC_SIZE/el_size) {
3334                 return NULL;
3335         }
3336
3337         if (el_size == 0 || count == 0) {
3338                 return NULL;
3339         }
3340
3341         return _talloc_zero(ctx, el_size * count, name);
3342 }
3343
3344 /*
3345  *   Talloc wrapper that returns NULL if size == 0.
3346  */
3347 void *talloc_zeronull(const void *context, size_t size, const char *name)
3348 {
3349         if (size == 0) {
3350                 return NULL;
3351         }
3352         return talloc_named_const(context, size, name);
3353 }
3354 #endif
3355
3356 /* Split a path name into filename and stream name components. Canonicalise
3357  * such that an implicit $DATA token is always explicit.
3358  *
3359  * The "specification" of this function can be found in the
3360  * run_local_stream_name() function in torture.c, I've tried those
3361  * combinations against a W2k3 server.
3362  */
3363
3364 NTSTATUS split_ntfs_stream_name(TALLOC_CTX *mem_ctx, const char *fname,
3365                                 char **pbase, char **pstream)
3366 {
3367         char *base = NULL;
3368         char *stream = NULL;
3369         char *sname; /* stream name */
3370         const char *stype; /* stream type */
3371
3372         DEBUG(10, ("split_ntfs_stream_name called for [%s]\n", fname));
3373
3374         sname = strchr_m(fname, ':');
3375
3376         if (lp_posix_pathnames() || (sname == NULL)) {
3377                 if (pbase != NULL) {
3378                         base = talloc_strdup(mem_ctx, fname);
3379                         NT_STATUS_HAVE_NO_MEMORY(base);
3380                 }
3381                 goto done;
3382         }
3383
3384         if (pbase != NULL) {
3385                 base = talloc_strndup(mem_ctx, fname, PTR_DIFF(sname, fname));
3386                 NT_STATUS_HAVE_NO_MEMORY(base);
3387         }
3388
3389         sname += 1;
3390
3391         stype = strchr_m(sname, ':');
3392
3393         if (stype == NULL) {
3394                 sname = talloc_strdup(mem_ctx, sname);
3395                 stype = "$DATA";
3396         }
3397         else {
3398                 if (StrCaseCmp(stype, ":$DATA") != 0) {
3399                         /*
3400                          * If there is an explicit stream type, so far we only
3401                          * allow $DATA. Is there anything else allowed? -- vl
3402                          */
3403                         DEBUG(10, ("[%s] is an invalid stream type\n", stype));
3404                         TALLOC_FREE(base);
3405                         return NT_STATUS_OBJECT_NAME_INVALID;
3406                 }
3407                 sname = talloc_strndup(mem_ctx, sname, PTR_DIFF(stype, sname));
3408                 stype += 1;
3409         }
3410
3411         if (sname == NULL) {
3412                 TALLOC_FREE(base);
3413                 return NT_STATUS_NO_MEMORY;
3414         }
3415
3416         if (sname[0] == '\0') {
3417                 /*
3418                  * no stream name, so no stream
3419                  */
3420                 goto done;
3421         }
3422
3423         if (pstream != NULL) {
3424                 stream = talloc_asprintf(mem_ctx, "%s:%s", sname, stype);
3425                 if (stream == NULL) {
3426                         TALLOC_FREE(sname);
3427                         TALLOC_FREE(base);
3428                         return NT_STATUS_NO_MEMORY;
3429                 }
3430                 /*
3431                  * upper-case the type field
3432                  */
3433                 strupper_m(strchr_m(stream, ':')+1);
3434         }
3435
3436  done:
3437         if (pbase != NULL) {
3438                 *pbase = base;
3439         }
3440         if (pstream != NULL) {
3441                 *pstream = stream;
3442         }
3443         return NT_STATUS_OK;
3444 }
3445
3446 bool is_valid_policy_hnd(const POLICY_HND *hnd)
3447 {
3448         POLICY_HND tmp;
3449         ZERO_STRUCT(tmp);
3450         return (memcmp(&tmp, hnd, sizeof(tmp)) != 0);
3451 }
3452
3453 /****************************************************************
3454  strip off leading '\\' from a hostname
3455 ****************************************************************/
3456
3457 const char *strip_hostname(const char *s)
3458 {
3459         if (!s) {
3460                 return NULL;
3461         }
3462
3463         if (strlen_m(s) < 3) {
3464                 return s;
3465         }
3466
3467         if (s[0] == '\\') s++;
3468         if (s[0] == '\\') s++;
3469
3470         return s;
3471 }