source3/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 2001-2002
   6    Copyright (C) Simo Sorce 2001
   7    Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "includes.h"
  25
  26 /* Max allowable allococation - 256mb - 0x10000000 */
  27 #define MAX_ALLOC_SIZE (1024*1024*256)
  28
  29 #if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))
  30 #ifdef WITH_NISPLUS_HOME
  31 #ifdef BROKEN_NISPLUS_INCLUDE_FILES
  32 /*
  33  * The following lines are needed due to buggy include files
  34  * in Solaris 2.6 which define GROUP in both /usr/include/sys/acl.h and
  35  * also in /usr/include/rpcsvc/nis.h. The definitions conflict. JRA.
  36  * Also GROUP_OBJ is defined as 0x4 in /usr/include/sys/acl.h and as
  37  * an enum in /usr/include/rpcsvc/nis.h.
  38  */
  39
  40 #if defined(GROUP)
  41 #undef GROUP
  42 #endif
  43
  44 #if defined(GROUP_OBJ)
  45 #undef GROUP_OBJ
  46 #endif
  47
  48 #endif /* BROKEN_NISPLUS_INCLUDE_FILES */
  49
  50 #include <rpcsvc/nis.h>
  51
  52 #endif /* WITH_NISPLUS_HOME */
  53 #endif /* HAVE_NETGROUP && WITH_AUTOMOUNT */
  54
  55 enum protocol_types Protocol = PROTOCOL_COREPLUS;
  56
  57 /* a default finfo structure to ensure all fields are sensible */
  58 file_info def_finfo = {-1,0,0,0,0,0,0,"",""};
  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 pstring user_socket_options=DEFAULT_SOCKET_OPTIONS;
  67
  68 /***********************************************************************
  69  Definitions for all names.
  70 ***********************************************************************/
  71
  72 static char *smb_myname;
  73 static char *smb_myworkgroup;
  74 static char *smb_scope;
  75 static int smb_num_netbios_names;
  76 static char **smb_my_netbios_names;
  77
  78 /***********************************************************************
  79  Allocate and set myname. Ensure upper case.
  80 ***********************************************************************/
  81
  82 BOOL set_global_myname(const char *myname)
  83 {
  84         SAFE_FREE(smb_myname);
  85         smb_myname = SMB_STRDUP(myname);
  86         if (!smb_myname)
  87                 return False;
  88         strupper_m(smb_myname);
  89         return True;
  90 }
  91
  92 const char *global_myname(void)
  93 {
  94         return smb_myname;
  95 }
  96
  97 /***********************************************************************
  98  Allocate and set myworkgroup. Ensure upper case.
  99 ***********************************************************************/
 100
 101 BOOL set_global_myworkgroup(const char *myworkgroup)
 102 {
 103         SAFE_FREE(smb_myworkgroup);
 104         smb_myworkgroup = SMB_STRDUP(myworkgroup);
 105         if (!smb_myworkgroup)
 106                 return False;
 107         strupper_m(smb_myworkgroup);
 108         return True;
 109 }
 110
 111 const char *lp_workgroup(void)
 112 {
 113         return smb_myworkgroup;
 114 }
 115
 116 /***********************************************************************
 117  Allocate and set scope. Ensure upper case.
 118 ***********************************************************************/
 119
 120 BOOL set_global_scope(const char *scope)
 121 {
 122         SAFE_FREE(smb_scope);
 123         smb_scope = SMB_STRDUP(scope);
 124         if (!smb_scope)
 125                 return False;
 126         strupper_m(smb_scope);
 127         return True;
 128 }
 129
 130 /*********************************************************************
 131  Ensure scope is never null string.
 132 *********************************************************************/
 133
 134 const char *global_scope(void)
 135 {
 136         if (!smb_scope)
 137                 set_global_scope("");
 138         return smb_scope;
 139 }
 140
 141 static void free_netbios_names_array(void)
 142 {
 143         int i;
 144
 145         for (i = 0; i < smb_num_netbios_names; i++)
 146                 SAFE_FREE(smb_my_netbios_names[i]);
 147
 148         SAFE_FREE(smb_my_netbios_names);
 149         smb_num_netbios_names = 0;
 150 }
 151
 152 static BOOL allocate_my_netbios_names_array(size_t number)
 153 {
 154         free_netbios_names_array();
 155
 156         smb_num_netbios_names = number + 1;
 157         smb_my_netbios_names = SMB_MALLOC_ARRAY( char *, smb_num_netbios_names );
 158
 159         if (!smb_my_netbios_names)
 160                 return False;
 161
 162         memset(smb_my_netbios_names, '\0', sizeof(char *) * smb_num_netbios_names);
 163         return True;
 164 }
 165
 166 static BOOL set_my_netbios_names(const char *name, int i)
 167 {
 168         SAFE_FREE(smb_my_netbios_names[i]);
 169
 170         smb_my_netbios_names[i] = SMB_STRDUP(name);
 171         if (!smb_my_netbios_names[i])
 172                 return False;
 173         strupper_m(smb_my_netbios_names[i]);
 174         return True;
 175 }
 176
 177 const char *my_netbios_names(int i)
 178 {
 179         return smb_my_netbios_names[i];
 180 }
 181
 182 BOOL set_netbios_aliases(const char **str_array)
 183 {
 184         size_t namecount;
 185
 186         /* Work out the max number of netbios aliases that we have */
 187         for( namecount=0; str_array && (str_array[namecount] != NULL); namecount++ )
 188                 ;
 189
 190         if ( global_myname() && *global_myname())
 191                 namecount++;
 192
 193         /* Allocate space for the netbios aliases */
 194         if (!allocate_my_netbios_names_array(namecount))
 195                 return False;
 196
 197         /* Use the global_myname string first */
 198         namecount=0;
 199         if ( global_myname() && *global_myname()) {
 200                 set_my_netbios_names( global_myname(), namecount );
 201                 namecount++;
 202         }
 203
 204         if (str_array) {
 205                 size_t i;
 206                 for ( i = 0; str_array[i] != NULL; i++) {
 207                         size_t n;
 208                         BOOL duplicate = False;
 209
 210                         /* Look for duplicates */
 211                         for( n=0; n<namecount; n++ ) {
 212                                 if( strequal( str_array[i], my_netbios_names(n) ) ) {
 213                                         duplicate = True;
 214                                         break;
 215                                 }
 216                         }
 217                         if (!duplicate) {
 218                                 if (!set_my_netbios_names(str_array[i], namecount))
 219                                         return False;
 220                                 namecount++;
 221                         }
 222                 }
 223         }
 224         return True;
 225 }
 226
 227 /****************************************************************************
 228   Common name initialization code.
 229 ****************************************************************************/
 230
 231 BOOL init_names(void)
 232 {
 233         extern fstring local_machine;
 234         char *p;
 235         int n;
 236
 237         if (global_myname() == NULL || *global_myname() == '\0') {
 238                 if (!set_global_myname(myhostname())) {
 239                         DEBUG( 0, ( "init_structs: malloc fail.\n" ) );
 240                         return False;
 241                 }
 242         }
 243
 244         if (!set_netbios_aliases(lp_netbios_aliases())) {
 245                 DEBUG( 0, ( "init_structs: malloc fail.\n" ) );
 246                 return False;
 247         }
 248
 249         fstrcpy( local_machine, global_myname() );
 250         trim_char( local_machine, ' ', ' ' );
 251         p = strchr( local_machine, ' ' );
 252         if (p)
 253                 *p = 0;
 254         strlower_m( local_machine );
 255
 256         DEBUG( 5, ("Netbios name list:-\n") );
 257         for( n=0; my_netbios_names(n); n++ )
 258                 DEBUGADD( 5, ( "my_netbios_names[%d]=\"%s\"\n", n, my_netbios_names(n) ) );
 259
 260         return( True );
 261 }
 262
 263 /**************************************************************************n
 264  Find a suitable temporary directory. The result should be copied immediately
 265  as it may be overwritten by a subsequent call.
 266 ****************************************************************************/
 267
 268 const char *tmpdir(void)
 269 {
 270         char *p;
 271         if ((p = getenv("TMPDIR")))
 272                 return p;
 273         return "/tmp";
 274 }
 275
 276 /****************************************************************************
 277  Add a gid to an array of gids if it's not already there.
 278 ****************************************************************************/
 279
 280 void add_gid_to_array_unique(TALLOC_CTX *mem_ctx, gid_t gid,
 281                              gid_t **gids, int *num)
 282 {
 283         int i;
 284
 285         for (i=0; i<*num; i++) {
 286                 if ((*gids)[i] == gid)
 287                         return;
 288         }
 289
 290         if (mem_ctx != NULL)
 291                 *gids = TALLOC_REALLOC_ARRAY(mem_ctx, *gids, gid_t, *num+1);
 292         else
 293                 *gids = SMB_REALLOC_ARRAY(*gids, gid_t, *num+1);
 294
 295         if (*gids == NULL)
 296                 return;
 297
 298         (*gids)[*num] = gid;
 299         *num += 1;
 300 }
 301
 302 /****************************************************************************
 303  Like atoi but gets the value up to the separator character.
 304 ****************************************************************************/
 305
 306 static const char *Atoic(const char *p, int *n, const char *c)
 307 {
 308         if (!isdigit((int)*p)) {
 309                 DEBUG(5, ("Atoic: malformed number\n"));
 310                 return NULL;
 311         }
 312
 313         (*n) = atoi(p);
 314
 315         while ((*p) && isdigit((int)*p))
 316                 p++;
 317
 318         if (strchr_m(c, *p) == NULL) {
 319                 DEBUG(5, ("Atoic: no separator characters (%s) not found\n", c));
 320                 return NULL;
 321         }
 322
 323         return p;
 324 }
 325
 326 /*************************************************************************
 327  Reads a list of numbers.
 328  *************************************************************************/
 329
 330 const char *get_numlist(const char *p, uint32 **num, int *count)
 331 {
 332         int val;
 333
 334         if (num == NULL || count == NULL)
 335                 return NULL;
 336
 337         (*count) = 0;
 338         (*num  ) = NULL;
 339
 340         while ((p = Atoic(p, &val, ":,")) != NULL && (*p) != ':') {
 341                 uint32 *tn;
 342
 343                 tn = SMB_REALLOC_ARRAY((*num), uint32, (*count)+1);
 344                 if (tn == NULL) {
 345                         SAFE_FREE(*num);
 346                         return NULL;
 347                 } else
 348                         (*num) = tn;
 349                 (*num)[(*count)] = val;
 350                 (*count)++;
 351                 p++;
 352         }
 353
 354         return p;
 355 }
 356
 357 /*******************************************************************
 358  Check if a file exists - call vfs_file_exist for samba files.
 359 ********************************************************************/
 360
 361 BOOL file_exist(const char *fname,SMB_STRUCT_STAT *sbuf)
 362 {
 363         SMB_STRUCT_STAT st;
 364         if (!sbuf)
 365                 sbuf = &st;
 366
 367         if (sys_stat(fname,sbuf) != 0)
 368                 return(False);
 369
 370         return((S_ISREG(sbuf->st_mode)) || (S_ISFIFO(sbuf->st_mode)));
 371 }
 372
 373 /*******************************************************************
 374  Check a files mod time.
 375 ********************************************************************/
 376
 377 time_t file_modtime(const char *fname)
 378 {
 379         SMB_STRUCT_STAT st;
 380
 381         if (sys_stat(fname,&st) != 0)
 382                 return(0);
 383
 384         return(st.st_mtime);
 385 }
 386
 387 /*******************************************************************
 388  Check if a directory exists.
 389 ********************************************************************/
 390
 391 BOOL directory_exist(char *dname,SMB_STRUCT_STAT *st)
 392 {
 393         SMB_STRUCT_STAT st2;
 394         BOOL ret;
 395
 396         if (!st)
 397                 st = &st2;
 398
 399         if (sys_stat(dname,st) != 0)
 400                 return(False);
 401
 402         ret = S_ISDIR(st->st_mode);
 403         if(!ret)
 404                 errno = ENOTDIR;
 405         return ret;
 406 }
 407
 408 /*******************************************************************
 409  Returns the size in bytes of the named file.
 410 ********************************************************************/
 411
 412 SMB_OFF_T get_file_size(char *file_name)
 413 {
 414         SMB_STRUCT_STAT buf;
 415         buf.st_size = 0;
 416         if(sys_stat(file_name,&buf) != 0)
 417                 return (SMB_OFF_T)-1;
 418         return(buf.st_size);
 419 }
 420
 421 /*******************************************************************
 422  Return a string representing an attribute for a file.
 423 ********************************************************************/
 424
 425 char *attrib_string(uint16 mode)
 426 {
 427         static fstring attrstr;
 428
 429         attrstr[0] = 0;
 430
 431         if (mode & aVOLID) fstrcat(attrstr,"V");
 432         if (mode & aDIR) fstrcat(attrstr,"D");
 433         if (mode & aARCH) fstrcat(attrstr,"A");
 434         if (mode & aHIDDEN) fstrcat(attrstr,"H");
 435         if (mode & aSYSTEM) fstrcat(attrstr,"S");
 436         if (mode & aRONLY) fstrcat(attrstr,"R");
 437
 438         return(attrstr);
 439 }
 440
 441 /*******************************************************************
 442  Show a smb message structure.
 443 ********************************************************************/
 444
 445 void show_msg(char *buf)
 446 {
 447         int i;
 448         int bcc=0;
 449
 450         if (!DEBUGLVL(5))
 451                 return;
 452
 453         DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n",
 454                         smb_len(buf),
 455                         (int)CVAL(buf,smb_com),
 456                         (int)CVAL(buf,smb_rcls),
 457                         (int)CVAL(buf,smb_reh),
 458                         (int)SVAL(buf,smb_err),
 459                         (int)CVAL(buf,smb_flg),
 460                         (int)SVAL(buf,smb_flg2)));
 461         DEBUGADD(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\n",
 462                         (int)SVAL(buf,smb_tid),
 463                         (int)SVAL(buf,smb_pid),
 464                         (int)SVAL(buf,smb_uid),
 465                         (int)SVAL(buf,smb_mid)));
 466         DEBUGADD(5,("smt_wct=%d\n",(int)CVAL(buf,smb_wct)));
 467
 468         for (i=0;i<(int)CVAL(buf,smb_wct);i++)
 469                 DEBUGADD(5,("smb_vwv[%2d]=%5d (0x%X)\n",i,
 470                         SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i)));
 471
 472         bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct)));
 473
 474         DEBUGADD(5,("smb_bcc=%d\n",bcc));
 475
 476         if (DEBUGLEVEL < 10)
 477                 return;
 478
 479         if (DEBUGLEVEL < 50)
 480                 bcc = MIN(bcc, 512);
 481
 482         dump_data(10, smb_buf(buf), bcc);
 483 }
 484
 485 /*******************************************************************
 486  Set the length and marker of an smb packet.
 487 ********************************************************************/
 488
 489 void smb_setlen(char *buf,int len)
 490 {
 491         _smb_setlen(buf,len);
 492
 493         SCVAL(buf,4,0xFF);
 494         SCVAL(buf,5,'S');
 495         SCVAL(buf,6,'M');
 496         SCVAL(buf,7,'B');
 497 }
 498
 499 /*******************************************************************
 500  Setup the word count and byte count for a smb message.
 501 ********************************************************************/
 502
 503 int set_message(char *buf,int num_words,int num_bytes,BOOL zero)
 504 {
 505         if (zero)
 506                 memset(buf + smb_size,'\0',num_words*2 + num_bytes);
 507         SCVAL(buf,smb_wct,num_words);
 508         SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
 509         smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
 510         return (smb_size + num_words*2 + num_bytes);
 511 }
 512
 513 /*******************************************************************
 514  Setup only the byte count for a smb message.
 515 ********************************************************************/
 516
 517 int set_message_bcc(char *buf,int num_bytes)
 518 {
 519         int num_words = CVAL(buf,smb_wct);
 520         SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
 521         smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
 522         return (smb_size + num_words*2 + num_bytes);
 523 }
 524
 525 /*******************************************************************
 526  Setup only the byte count for a smb message, using the end of the
 527  message as a marker.
 528 ********************************************************************/
 529
 530 int set_message_end(void *outbuf,void *end_ptr)
 531 {
 532         return set_message_bcc((char *)outbuf,PTR_DIFF(end_ptr,smb_buf((char *)outbuf)));
 533 }
 534
 535 /*******************************************************************
 536  Reduce a file name, removing .. elements.
 537 ********************************************************************/
 538
 539 void dos_clean_name(char *s)
 540 {
 541         char *p=NULL;
 542
 543         DEBUG(3,("dos_clean_name [%s]\n",s));
 544
 545         /* remove any double slashes */
 546         all_string_sub(s, "\\\\", "\\", 0);
 547
 548         while ((p = strstr_m(s,"\\..\\")) != NULL) {
 549                 pstring s1;
 550
 551                 *p = 0;
 552                 pstrcpy(s1,p+3);
 553
 554                 if ((p=strrchr_m(s,'\\')) != NULL)
 555                         *p = 0;
 556                 else
 557                         *s = 0;
 558                 pstrcat(s,s1);
 559         }
 560
 561         trim_string(s,NULL,"\\..");
 562
 563         all_string_sub(s, "\\.\\", "\\", 0);
 564 }
 565
 566 /*******************************************************************
 567  Reduce a file name, removing .. elements.
 568 ********************************************************************/
 569
 570 void unix_clean_name(char *s)
 571 {
 572         char *p=NULL;
 573
 574         DEBUG(3,("unix_clean_name [%s]\n",s));
 575
 576         /* remove any double slashes */
 577         all_string_sub(s, "//","/", 0);
 578
 579         /* Remove leading ./ characters */
 580         if(strncmp(s, "./", 2) == 0) {
 581                 trim_string(s, "./", NULL);
 582                 if(*s == 0)
 583                         pstrcpy(s,"./");
 584         }
 585
 586         while ((p = strstr_m(s,"/../")) != NULL) {
 587                 pstring s1;
 588
 589                 *p = 0;
 590                 pstrcpy(s1,p+3);
 591
 592                 if ((p=strrchr_m(s,'/')) != NULL)
 593                         *p = 0;
 594                 else
 595                         *s = 0;
 596                 pstrcat(s,s1);
 597         }
 598
 599         trim_string(s,NULL,"/..");
 600 }
 601
 602 /****************************************************************************
 603  Make a dir struct.
 604 ****************************************************************************/
 605
 606 void make_dir_struct(char *buf, const char *mask, const char *fname,SMB_OFF_T size,int mode,time_t date)
 607 {
 608         char *p;
 609         pstring mask2;
 610
 611         pstrcpy(mask2,mask);
 612
 613         if ((mode & aDIR) != 0)
 614                 size = 0;
 615
 616         memset(buf+1,' ',11);
 617         if ((p = strchr_m(mask2,'.')) != NULL) {
 618                 *p = 0;
 619                 push_ascii(buf+1,mask2,8, 0);
 620                 push_ascii(buf+9,p+1,3, 0);
 621                 *p = '.';
 622         } else
 623                 push_ascii(buf+1,mask2,11, 0);
 624
 625         memset(buf+21,'\0',DIR_STRUCT_SIZE-21);
 626         SCVAL(buf,21,mode);
 627         put_dos_date(buf,22,date);
 628         SSVAL(buf,26,size & 0xFFFF);
 629         SSVAL(buf,28,(size >> 16)&0xFFFF);
 630         /* We only uppercase if the protocol is downrev.
 631            Strange, but verified on W2K3. Needed for OS/2. JRA. */
 632         push_ascii(buf+30,fname,12,Protocol < PROTOCOL_NT1 ? STR_UPPER : 0);
 633         DEBUG(8,("put name [%s] from [%s] into dir struct\n",buf+30, fname));
 634 }
 635
 636 /*******************************************************************
 637  Close the low 3 fd's and open dev/null in their place.
 638 ********************************************************************/
 639
 640 void close_low_fds(BOOL stderr_too)
 641 {
 642 #ifndef VALGRIND
 643         int fd;
 644         int i;
 645
 646         close(0);
 647         close(1);
 648
 649         if (stderr_too)
 650                 close(2);
 651
 652         /* try and use up these file descriptors, so silly
 653                 library routines writing to stdout etc won't cause havoc */
 654         for (i=0;i<3;i++) {
 655                 if (i == 2 && !stderr_too)
 656                         continue;
 657
 658                 fd = sys_open("/dev/null",O_RDWR,0);
 659                 if (fd < 0)
 660                         fd = sys_open("/dev/null",O_WRONLY,0);
 661                 if (fd < 0) {
 662                         DEBUG(0,("Can't open /dev/null\n"));
 663                         return;
 664                 }
 665                 if (fd != i) {
 666                         DEBUG(0,("Didn't get file descriptor %d\n",i));
 667                         return;
 668                 }
 669         }
 670 #endif
 671 }
 672
 673 /****************************************************************************
 674  Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
 675  else
 676   if SYSV use O_NDELAY
 677   if BSD use FNDELAY
 678 ****************************************************************************/
 679
 680 int set_blocking(int fd, BOOL set)
 681 {
 682         int val;
 683 #ifdef O_NONBLOCK
 684 #define FLAG_TO_SET O_NONBLOCK
 685 #else
 686 #ifdef SYSV
 687 #define FLAG_TO_SET O_NDELAY
 688 #else /* BSD */
 689 #define FLAG_TO_SET FNDELAY
 690 #endif
 691 #endif
 692
 693         if((val = sys_fcntl_long(fd, F_GETFL, 0)) == -1)
 694                 return -1;
 695         if(set) /* Turn blocking on - ie. clear nonblock flag */
 696                 val &= ~FLAG_TO_SET;
 697         else
 698                 val |= FLAG_TO_SET;
 699         return sys_fcntl_long( fd, F_SETFL, val);
 700 #undef FLAG_TO_SET
 701 }
 702
 703 /****************************************************************************
 704  Transfer some data between two fd's.
 705 ****************************************************************************/
 706
 707 #ifndef TRANSFER_BUF_SIZE
 708 #define TRANSFER_BUF_SIZE 65536
 709 #endif
 710
 711 ssize_t transfer_file_internal(int infd, int outfd, size_t n, ssize_t (*read_fn)(int, void *, size_t),
 712                                                 ssize_t (*write_fn)(int, const void *, size_t))
 713 {
 714         char *buf;
 715         size_t total = 0;
 716         ssize_t read_ret;
 717         ssize_t write_ret;
 718         size_t num_to_read_thistime;
 719         size_t num_written = 0;
 720
 721         if ((buf = SMB_MALLOC(TRANSFER_BUF_SIZE)) == NULL)
 722                 return -1;
 723
 724         while (total < n) {
 725                 num_to_read_thistime = MIN((n - total), TRANSFER_BUF_SIZE);
 726
 727                 read_ret = (*read_fn)(infd, buf, num_to_read_thistime);
 728                 if (read_ret == -1) {
 729                         DEBUG(0,("transfer_file_internal: read failure. Error = %s\n", strerror(errno) ));
 730                         SAFE_FREE(buf);
 731                         return -1;
 732                 }
 733                 if (read_ret == 0)
 734                         break;
 735
 736                 num_written = 0;
 737
 738                 while (num_written < read_ret) {
 739                         write_ret = (*write_fn)(outfd,buf + num_written, read_ret - num_written);
 740
 741                         if (write_ret == -1) {
 742                                 DEBUG(0,("transfer_file_internal: write failure. Error = %s\n", strerror(errno) ));
 743                                 SAFE_FREE(buf);
 744                                 return -1;
 745                         }
 746                         if (write_ret == 0)
 747                                 return (ssize_t)total;
 748
 749                         num_written += (size_t)write_ret;
 750                 }
 751
 752                 total += (size_t)read_ret;
 753         }
 754
 755         SAFE_FREE(buf);
 756         return (ssize_t)total;
 757 }
 758
 759 SMB_OFF_T transfer_file(int infd,int outfd,SMB_OFF_T n)
 760 {
 761         return (SMB_OFF_T)transfer_file_internal(infd, outfd, (size_t)n, sys_read, sys_write);
 762 }
 763
 764 /*******************************************************************
 765  Sleep for a specified number of milliseconds.
 766 ********************************************************************/
 767
 768 void smb_msleep(unsigned int t)
 769 {
 770 #if defined(HAVE_NANOSLEEP)
 771         struct timespec tval;
 772         int ret;
 773
 774         tval.tv_sec = t/1000;
 775         tval.tv_nsec = 1000000*(t%1000);
 776
 777         do {
 778                 errno = 0;
 779                 ret = nanosleep(&tval, &tval);
 780         } while (ret < 0 && errno == EINTR && (tval.tv_sec > 0 || tval.tv_nsec > 0));
 781 #else
 782         unsigned int tdiff=0;
 783         struct timeval tval,t1,t2;
 784         fd_set fds;
 785
 786         GetTimeOfDay(&t1);
 787         t2 = t1;
 788
 789         while (tdiff < t) {
 790                 tval.tv_sec = (t-tdiff)/1000;
 791                 tval.tv_usec = 1000*((t-tdiff)%1000);
 792
 793                 /* Never wait for more than 1 sec. */
 794                 if (tval.tv_sec > 1) {
 795                         tval.tv_sec = 1;
 796                         tval.tv_usec = 0;
 797                 }
 798
 799                 FD_ZERO(&fds);
 800                 errno = 0;
 801                 sys_select_intr(0,&fds,NULL,NULL,&tval);
 802
 803                 GetTimeOfDay(&t2);
 804                 if (t2.tv_sec < t1.tv_sec) {
 805                         /* Someone adjusted time... */
 806                         t1 = t2;
 807                 }
 808
 809                 tdiff = TvalDiff(&t1,&t2);
 810         }
 811 #endif
 812 }
 813
 814 /****************************************************************************
 815  Become a daemon, discarding the controlling terminal.
 816 ****************************************************************************/
 817
 818 void become_daemon(BOOL Fork)
 819 {
 820         if (Fork) {
 821                 if (sys_fork()) {
 822                         _exit(0);
 823                 }
 824         }
 825
 826   /* detach from the terminal */
 827 #ifdef HAVE_SETSID
 828         setsid();
 829 #elif defined(TIOCNOTTY)
 830         {
 831                 int i = sys_open("/dev/tty", O_RDWR, 0);
 832                 if (i != -1) {
 833                         ioctl(i, (int) TIOCNOTTY, (char *)0);
 834                         close(i);
 835                 }
 836         }
 837 #endif /* HAVE_SETSID */
 838
 839         /* Close fd's 0,1,2. Needed if started by rsh */
 840         close_low_fds(False);  /* Don't close stderr, let the debug system
 841                                   attach it to the logfile */
 842 }
 843
 844 /****************************************************************************
 845  Put up a yes/no prompt.
 846 ****************************************************************************/
 847
 848 BOOL yesno(char *p)
 849 {
 850         pstring ans;
 851         printf("%s",p);
 852
 853         if (!fgets(ans,sizeof(ans)-1,stdin))
 854                 return(False);
 855
 856         if (*ans == 'y' || *ans == 'Y')
 857                 return(True);
 858
 859         return(False);
 860 }
 861
 862 #if defined(PARANOID_MALLOC_CHECKER)
 863
 864 /****************************************************************************
 865  Internal malloc wrapper. Externally visible.
 866 ****************************************************************************/
 867
 868 void *malloc_(size_t size)
 869 {
 870 #undef malloc
 871         return malloc(size);
 872 #define malloc(s) __ERROR_DONT_USE_MALLOC_DIRECTLY
 873 }
 874
 875 /****************************************************************************
 876  Internal calloc wrapper. Not externally visible.
 877 ****************************************************************************/
 878
 879 static void *calloc_(size_t count, size_t size)
 880 {
 881 #undef calloc
 882         return calloc(count, size);
 883 #define calloc(n,s) __ERROR_DONT_USE_CALLOC_DIRECTLY
 884 }
 885
 886 /****************************************************************************
 887  Internal realloc wrapper. Not externally visible.
 888 ****************************************************************************/
 889
 890 static void *realloc_(void *ptr, size_t size)
 891 {
 892 #undef realloc
 893         return realloc(ptr, size);
 894 #define realloc(p,s) __ERROR_DONT_USE_RELLOC_DIRECTLY
 895 }
 896
 897 #endif /* PARANOID_MALLOC_CHECKER */
 898
 899 /****************************************************************************
 900  Type-safe malloc.
 901 ****************************************************************************/
 902
 903 void *malloc_array(size_t el_size, unsigned int count)
 904 {
 905         if (count >= MAX_ALLOC_SIZE/el_size) {
 906                 return NULL;
 907         }
 908
 909 #if defined(PARANOID_MALLOC_CHECKER)
 910         return malloc_(el_size*count);
 911 #else
 912         return malloc(el_size*count);
 913 #endif
 914 }
 915
 916 /****************************************************************************
 917  Type-safe calloc.
 918 ****************************************************************************/
 919
 920 void *calloc_array(size_t size, size_t nmemb)
 921 {
 922         if (nmemb >= MAX_ALLOC_SIZE/size) {
 923                 return NULL;
 924         }
 925 #if defined(PARANOID_MALLOC_CHECKER)
 926         return calloc_(nmemb, size);
 927 #else
 928         return calloc(nmemb, size);
 929 #endif
 930 }
 931
 932 /****************************************************************************
 933  Expand a pointer to be a particular size.
 934 ****************************************************************************/
 935
 936 void *Realloc(void *p,size_t size)
 937 {
 938         void *ret=NULL;
 939
 940         if (size == 0) {
 941                 SAFE_FREE(p);
 942                 DEBUG(5,("Realloc asked for 0 bytes\n"));
 943                 return NULL;
 944         }
 945
 946 #if defined(PARANOID_MALLOC_CHECKER)
 947         if (!p)
 948                 ret = (void *)malloc_(size);
 949         else
 950                 ret = (void *)realloc_(p,size);
 951 #else
 952         if (!p)
 953                 ret = (void *)malloc(size);
 954         else
 955                 ret = (void *)realloc(p,size);
 956 #endif
 957
 958         if (!ret)
 959                 DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",(int)size));
 960
 961         return(ret);
 962 }
 963
 964 /****************************************************************************
 965  Type-safe realloc.
 966 ****************************************************************************/
 967
 968 void *realloc_array(void *p,size_t el_size, unsigned int count)
 969 {
 970         if (count >= MAX_ALLOC_SIZE/el_size) {
 971                 return NULL;
 972         }
 973         return Realloc(p,el_size*count);
 974 }
 975
 976 /****************************************************************************
 977  Free memory, checks for NULL.
 978  Use directly SAFE_FREE()
 979  Exists only because we need to pass a function pointer somewhere --SSS
 980 ****************************************************************************/
 981
 982 void safe_free(void *p)
 983 {
 984         SAFE_FREE(p);
 985 }
 986
 987 /****************************************************************************
 988  Get my own name and IP.
 989 ****************************************************************************/
 990
 991 BOOL get_myname(char *my_name)
 992 {
 993         pstring hostname;
 994
 995         *hostname = 0;
 996
 997         /* get my host name */
 998         if (gethostname(hostname, sizeof(hostname)) == -1) {
 999                 DEBUG(0,("gethostname failed\n"));
1000                 return False;
1001         }
1002
1003         /* Ensure null termination. */
1004         hostname[sizeof(hostname)-1] = '\0';
1005
1006         if (my_name) {
1007                 /* split off any parts after an initial . */
1008                 char *p = strchr_m(hostname,'.');
1009
1010                 if (p)
1011                         *p = 0;
1012
1013                 fstrcpy(my_name,hostname);
1014         }
1015
1016         return(True);
1017 }
1018
1019 /****************************************************************************
1020  Get my own canonical name, including domain.
1021 ****************************************************************************/
1022
1023 BOOL get_mydnsfullname(fstring my_dnsname)
1024 {
1025         static fstring dnshostname;
1026         struct hostent *hp;
1027
1028         if (!*dnshostname) {
1029                 /* get my host name */
1030                 if (gethostname(dnshostname, sizeof(dnshostname)) == -1) {
1031                         *dnshostname = '\0';
1032                         DEBUG(0,("gethostname failed\n"));
1033                         return False;
1034                 }
1035
1036                 /* Ensure null termination. */
1037                 dnshostname[sizeof(dnshostname)-1] = '\0';
1038
1039                 /* Ensure we get the cannonical name. */
1040                 if (!(hp = sys_gethostbyname(dnshostname))) {
1041                         *dnshostname = '\0';
1042                         return False;
1043                 }
1044                 fstrcpy(dnshostname, hp->h_name);
1045         }
1046         fstrcpy(my_dnsname, dnshostname);
1047         return True;
1048 }
1049
1050 /****************************************************************************
1051  Get my own domain name.
1052 ****************************************************************************/
1053
1054 BOOL get_mydnsdomname(fstring my_domname)
1055 {
1056         fstring domname;
1057         char *p;
1058
1059         *my_domname = '\0';
1060         if (!get_mydnsfullname(domname)) {
1061                 return False;
1062         }
1063         p = strchr_m(domname, '.');
1064         if (p) {
1065                 p++;
1066                 fstrcpy(my_domname, p);
1067         }
1068
1069         return False;
1070 }
1071
1072 /****************************************************************************
1073  Interpret a protocol description string, with a default.
1074 ****************************************************************************/
1075
1076 int interpret_protocol(const char *str,int def)
1077 {
1078         if (strequal(str,"NT1"))
1079                 return(PROTOCOL_NT1);
1080         if (strequal(str,"LANMAN2"))
1081                 return(PROTOCOL_LANMAN2);
1082         if (strequal(str,"LANMAN1"))
1083                 return(PROTOCOL_LANMAN1);
1084         if (strequal(str,"CORE"))
1085                 return(PROTOCOL_CORE);
1086         if (strequal(str,"COREPLUS"))
1087                 return(PROTOCOL_COREPLUS);
1088         if (strequal(str,"CORE+"))
1089                 return(PROTOCOL_COREPLUS);
1090
1091         DEBUG(0,("Unrecognised protocol level %s\n",str));
1092
1093         return(def);
1094 }
1095
1096 /****************************************************************************
1097  Return true if a string could be a pure IP address.
1098 ****************************************************************************/
1099
1100 BOOL is_ipaddress(const char *str)
1101 {
1102         BOOL pure_address = True;
1103         int i;
1104
1105         for (i=0; pure_address && str[i]; i++)
1106                 if (!(isdigit((int)str[i]) || str[i] == '.'))
1107                         pure_address = False;
1108
1109         /* Check that a pure number is not misinterpreted as an IP */
1110         pure_address = pure_address && (strchr_m(str, '.') != NULL);
1111
1112         return pure_address;
1113 }
1114
1115 /****************************************************************************
1116  Interpret an internet address or name into an IP address in 4 byte form.
1117 ****************************************************************************/
1118
1119 uint32 interpret_addr(const char *str)
1120 {
1121         struct hostent *hp;
1122         uint32 res;
1123
1124         if (strcmp(str,"0.0.0.0") == 0)
1125                 return(0);
1126         if (strcmp(str,"255.255.255.255") == 0)
1127                 return(0xFFFFFFFF);
1128
1129   /* if it's in the form of an IP address then get the lib to interpret it */
1130         if (is_ipaddress(str)) {
1131                 res = inet_addr(str);
1132         } else {
1133                 /* otherwise assume it's a network name of some sort and use
1134                         sys_gethostbyname */
1135                 if ((hp = sys_gethostbyname(str)) == 0) {
1136                         DEBUG(3,("sys_gethostbyname: Unknown host. %s\n",str));
1137                         return 0;
1138                 }
1139
1140                 if(hp->h_addr == NULL) {
1141                         DEBUG(3,("sys_gethostbyname: host address is invalid for host %s\n",str));
1142                         return 0;
1143                 }
1144                 putip((char *)&res,(char *)hp->h_addr);
1145         }
1146
1147         if (res == (uint32)-1)
1148                 return(0);
1149
1150         return(res);
1151 }
1152
1153 /*******************************************************************
1154  A convenient addition to interpret_addr().
1155 ******************************************************************/
1156
1157 struct in_addr *interpret_addr2(const char *str)
1158 {
1159         static struct in_addr ret;
1160         uint32 a = interpret_addr(str);
1161         ret.s_addr = a;
1162         return(&ret);
1163 }
1164
1165 /*******************************************************************
1166  Check if an IP is the 0.0.0.0.
1167 ******************************************************************/
1168
1169 BOOL is_zero_ip(struct in_addr ip)
1170 {
1171         uint32 a;
1172         putip((char *)&a,(char *)&ip);
1173         return(a == 0);
1174 }
1175
1176 /*******************************************************************
1177  Set an IP to 0.0.0.0.
1178 ******************************************************************/
1179
1180 void zero_ip(struct in_addr *ip)
1181 {
1182         static BOOL init;
1183         static struct in_addr ipzero;
1184
1185         if (!init) {
1186                 ipzero = *interpret_addr2("0.0.0.0");
1187                 init = True;
1188         }
1189
1190         *ip = ipzero;
1191 }
1192
1193 #if (defined(HAVE_NETGROUP) && defined(WITH_AUTOMOUNT))
1194 /******************************************************************
1195  Remove any mount options such as -rsize=2048,wsize=2048 etc.
1196  Based on a fix from <Thomas.Hepper@icem.de>.
1197 *******************************************************************/
1198
1199 static void strip_mount_options( pstring *str)
1200 {
1201         if (**str == '-') {
1202                 char *p = *str;
1203                 while(*p && !isspace(*p))
1204                         p++;
1205                 while(*p && isspace(*p))
1206                         p++;
1207                 if(*p) {
1208                         pstring tmp_str;
1209
1210                         pstrcpy(tmp_str, p);
1211                         pstrcpy(*str, tmp_str);
1212                 }
1213         }
1214 }
1215
1216 /*******************************************************************
1217  Patch from jkf@soton.ac.uk
1218  Split Luke's automount_server into YP lookup and string splitter
1219  so can easily implement automount_path().
1220  As we may end up doing both, cache the last YP result.
1221 *******************************************************************/
1222
1223 #ifdef WITH_NISPLUS_HOME
1224 char *automount_lookup( char *user_name)
1225 {
1226         static fstring last_key = "";
1227         static pstring last_value = "";
1228
1229         char *nis_map = (char *)lp_nis_home_map_name();
1230
1231         char buffer[NIS_MAXATTRVAL + 1];
1232         nis_result *result;
1233         nis_object *object;
1234         entry_obj  *entry;
1235
1236         if (strcmp(user_name, last_key)) {
1237                 slprintf(buffer, sizeof(buffer)-1, "[key=%s],%s", user_name, nis_map);
1238                 DEBUG(5, ("NIS+ querystring: %s\n", buffer));
1239
1240                 if (result = nis_list(buffer, FOLLOW_PATH|EXPAND_NAME|HARD_LOOKUP, NULL, NULL)) {
1241                         if (result->status != NIS_SUCCESS) {
1242                                 DEBUG(3, ("NIS+ query failed: %s\n", nis_sperrno(result->status)));
1243                                 fstrcpy(last_key, ""); pstrcpy(last_value, "");
1244                         } else {
1245                                 object = result->objects.objects_val;
1246                                 if (object->zo_data.zo_type == ENTRY_OBJ) {
1247                                         entry = &object->zo_data.objdata_u.en_data;
1248                                         DEBUG(5, ("NIS+ entry type: %s\n", entry->en_type));
1249                                         DEBUG(3, ("NIS+ result: %s\n", entry->en_cols.en_cols_val[1].ec_value.ec_value_val));
1250
1251                                         pstrcpy(last_value, entry->en_cols.en_cols_val[1].ec_value.ec_value_val);
1252                                         pstring_sub(last_value, "&", user_name);
1253                                         fstrcpy(last_key, user_name);
1254                                 }
1255                         }
1256                 }
1257                 nis_freeresult(result);
1258         }
1259
1260         strip_mount_options(&last_value);
1261
1262         DEBUG(4, ("NIS+ Lookup: %s resulted in %s\n", user_name, last_value));
1263         return last_value;
1264 }
1265 #else /* WITH_NISPLUS_HOME */
1266
1267 char *automount_lookup( char *user_name)
1268 {
1269         static fstring last_key = "";
1270         static pstring last_value = "";
1271
1272         int nis_error;        /* returned by yp all functions */
1273         char *nis_result;     /* yp_match inits this */
1274         int nis_result_len;  /* and set this */
1275         char *nis_domain;     /* yp_get_default_domain inits this */
1276         char *nis_map = (char *)lp_nis_home_map_name();
1277
1278         if ((nis_error = yp_get_default_domain(&nis_domain)) != 0) {
1279                 DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error)));
1280                 return last_value;
1281         }
1282
1283         DEBUG(5, ("NIS Domain: %s\n", nis_domain));
1284
1285         if (!strcmp(user_name, last_key)) {
1286                 nis_result = last_value;
1287                 nis_result_len = strlen(last_value);
1288                 nis_error = 0;
1289         } else {
1290                 if ((nis_error = yp_match(nis_domain, nis_map, user_name, strlen(user_name),
1291                                 &nis_result, &nis_result_len)) == 0) {
1292                         if (!nis_error && nis_result_len >= sizeof(pstring)) {
1293                                 nis_result_len = sizeof(pstring)-1;
1294                         }
1295                         fstrcpy(last_key, user_name);
1296                         strncpy(last_value, nis_result, nis_result_len);
1297                         last_value[nis_result_len] = '\0';
1298                         strip_mount_options(&last_value);
1299
1300                 } else if(nis_error == YPERR_KEY) {
1301
1302                         /* If Key lookup fails user home server is not in nis_map
1303                                 use default information for server, and home directory */
1304                         last_value[0] = 0;
1305                         DEBUG(3, ("YP Key not found:  while looking up \"%s\" in map \"%s\"\n",
1306                                         user_name, nis_map));
1307                         DEBUG(3, ("using defaults for server and home directory\n"));
1308                 } else {
1309                         DEBUG(3, ("YP Error: \"%s\" while looking up \"%s\" in map \"%s\"\n",
1310                                         yperr_string(nis_error), user_name, nis_map));
1311                 }
1312         }
1313
1314         DEBUG(4, ("YP Lookup: %s resulted in %s\n", user_name, last_value));
1315         return last_value;
1316 }
1317 #endif /* WITH_NISPLUS_HOME */
1318 #endif
1319
1320 /*******************************************************************
1321  Are two IPs on the same subnet?
1322 ********************************************************************/
1323
1324 BOOL same_net(struct in_addr ip1,struct in_addr ip2,struct in_addr mask)
1325 {
1326         uint32 net1,net2,nmask;
1327
1328         nmask = ntohl(mask.s_addr);
1329         net1  = ntohl(ip1.s_addr);
1330         net2  = ntohl(ip2.s_addr);
1331
1332         return((net1 & nmask) == (net2 & nmask));
1333 }
1334
1335
1336 /****************************************************************************
1337  Check if a process exists. Does this work on all unixes?
1338 ****************************************************************************/
1339
1340 BOOL process_exists(pid_t pid)
1341 {
1342         /* Doing kill with a non-positive pid causes messages to be
1343          * sent to places we don't want. */
1344         SMB_ASSERT(pid > 0);
1345         return(kill(pid,0) == 0 || errno != ESRCH);
1346 }
1347
1348 /*******************************************************************
1349  Convert a uid into a user name.
1350 ********************************************************************/
1351
1352 const char *uidtoname(uid_t uid)
1353 {
1354         static fstring name;
1355         struct passwd *pass;
1356
1357         pass = getpwuid_alloc(uid);
1358         if (pass) {
1359                 fstrcpy(name, pass->pw_name);
1360                 passwd_free(&pass);
1361         } else {
1362                 slprintf(name, sizeof(name) - 1, "%ld",(long int)uid);
1363         }
1364         return name;
1365 }
1366
1367
1368 /*******************************************************************
1369  Convert a gid into a group name.
1370 ********************************************************************/
1371
1372 char *gidtoname(gid_t gid)
1373 {
1374         static fstring name;
1375         struct group *grp;
1376
1377         grp = getgrgid(gid);
1378         if (grp)
1379                 return(grp->gr_name);
1380         slprintf(name,sizeof(name) - 1, "%d",(int)gid);
1381         return(name);
1382 }
1383
1384 /*******************************************************************
1385  Convert a user name into a uid.
1386 ********************************************************************/
1387
1388 uid_t nametouid(const char *name)
1389 {
1390         struct passwd *pass;
1391         char *p;
1392         uid_t u;
1393
1394         pass = getpwnam_alloc(name);
1395         if (pass) {
1396                 u = pass->pw_uid;
1397                 passwd_free(&pass);
1398                 return u;
1399         }
1400
1401         u = (uid_t)strtol(name, &p, 0);
1402         if ((p != name) && (*p == '\0'))
1403                 return u;
1404
1405         return (uid_t)-1;
1406 }
1407
1408 /*******************************************************************
1409  Convert a name to a gid_t if possible. Return -1 if not a group.
1410 ********************************************************************/
1411
1412 gid_t nametogid(const char *name)
1413 {
1414         struct group *grp;
1415         char *p;
1416         gid_t g;
1417
1418         g = (gid_t)strtol(name, &p, 0);
1419         if ((p != name) && (*p == '\0'))
1420                 return g;
1421
1422         grp = sys_getgrnam(name);
1423         if (grp)
1424                 return(grp->gr_gid);
1425         return (gid_t)-1;
1426 }
1427
1428 /*******************************************************************
1429  legacy wrapper for smb_panic2()
1430 ********************************************************************/
1431 void smb_panic( const char *why )
1432 {
1433         smb_panic2( why, True );
1434 }
1435
1436 /*******************************************************************
1437  Something really nasty happened - panic !
1438 ********************************************************************/
1439
1440 #ifdef HAVE_LIBEXC_H
1441 #include <libexc.h>
1442 #endif
1443
1444 void smb_panic2(const char *why, BOOL decrement_pid_count )
1445 {
1446         char *cmd;
1447         int result;
1448 #ifdef HAVE_BACKTRACE_SYMBOLS
1449         void *backtrace_stack[BACKTRACE_STACK_SIZE];
1450         size_t backtrace_size;
1451         char **backtrace_strings;
1452 #endif
1453
1454 #ifdef DEVELOPER
1455         {
1456                 extern char *global_clobber_region_function;
1457                 extern unsigned int global_clobber_region_line;
1458
1459                 if (global_clobber_region_function) {
1460                         DEBUG(0,("smb_panic: clobber_region() last called from [%s(%u)]\n",
1461                                          global_clobber_region_function,
1462                                          global_clobber_region_line));
1463                 }
1464         }
1465 #endif
1466
1467         /* only smbd needs to decrement the smbd counter in connections.tdb */
1468         if ( decrement_pid_count )
1469                 decrement_smbd_process_count();
1470
1471         cmd = lp_panic_action();
1472         if (cmd && *cmd) {
1473                 DEBUG(0, ("smb_panic(): calling panic action [%s]\n", cmd));
1474                 result = system(cmd);
1475
1476                 if (result == -1)
1477                         DEBUG(0, ("smb_panic(): fork failed in panic action: %s\n",
1478                                           strerror(errno)));
1479                 else
1480                         DEBUG(0, ("smb_panic(): action returned status %d\n",
1481                                           WEXITSTATUS(result)));
1482         }
1483         DEBUG(0,("PANIC: %s\n", why));
1484
1485 #ifdef HAVE_BACKTRACE_SYMBOLS
1486         /* get the backtrace (stack frames) */
1487         backtrace_size = backtrace(backtrace_stack,BACKTRACE_STACK_SIZE);
1488         backtrace_strings = backtrace_symbols(backtrace_stack, backtrace_size);
1489
1490         DEBUG(0, ("BACKTRACE: %lu stack frames:\n",
1491                   (unsigned long)backtrace_size));
1492
1493         if (backtrace_strings) {
1494                 int i;
1495
1496                 for (i = 0; i < backtrace_size; i++)
1497                         DEBUGADD(0, (" #%u %s\n", i, backtrace_strings[i]));
1498
1499                 /* Leak the backtrace_strings, rather than risk what free() might do */
1500         }
1501
1502 #elif HAVE_LIBEXC
1503
1504 #define NAMESIZE 32 /* Arbitrary */
1505
1506         /* The IRIX libexc library provides an API for unwinding the stack. See
1507          * libexc(3) for details. Apparantly trace_back_stack leaks memory, but
1508          * since we are about to abort anyway, it hardly matters.
1509          *
1510          * Note that if we paniced due to a SIGSEGV or SIGBUS (or similar) this
1511          * will fail with a nasty message upon failing to open the /proc entry.
1512          */
1513         {
1514                 __uint64_t      addrs[BACKTRACE_STACK_SIZE];
1515                 char *          names[BACKTRACE_STACK_SIZE];
1516                 char            namebuf[BACKTRACE_STACK_SIZE * NAMESIZE];
1517
1518                 int             i;
1519                 int             levels;
1520
1521                 ZERO_ARRAY(addrs);
1522                 ZERO_ARRAY(names);
1523                 ZERO_ARRAY(namebuf);
1524
1525                 /* We need to be root so we can open our /proc entry to walk
1526                  * our stack. It also helps when we want to dump core.
1527                  */
1528                 become_root();
1529
1530                 for (i = 0; i < BACKTRACE_STACK_SIZE; i++) {
1531                         names[i] = namebuf + (i * NAMESIZE);
1532                 }
1533
1534                 levels = trace_back_stack(0, addrs, names,
1535                                 BACKTRACE_STACK_SIZE, NAMESIZE);
1536
1537                 DEBUG(0, ("BACKTRACE: %d stack frames:\n", levels));
1538                 for (i = 0; i < levels; i++) {
1539                         DEBUGADD(0, (" #%d 0x%llx %s\n", i, addrs[i], names[i]));
1540                 }
1541      }
1542 #undef NAMESIZE
1543 #endif
1544
1545         dbgflush();
1546 #ifdef SIGABRT
1547         CatchSignal(SIGABRT,SIGNAL_CAST SIG_DFL);
1548 #endif
1549         abort();
1550 }
1551
1552 /*******************************************************************
1553   A readdir wrapper which just returns the file name.
1554  ********************************************************************/
1555
1556 const char *readdirname(DIR *p)
1557 {
1558         SMB_STRUCT_DIRENT *ptr;
1559         char *dname;
1560
1561         if (!p)
1562                 return(NULL);
1563
1564         ptr = (SMB_STRUCT_DIRENT *)sys_readdir(p);
1565         if (!ptr)
1566                 return(NULL);
1567
1568         dname = ptr->d_name;
1569
1570 #ifdef NEXT2
1571         if (telldir(p) < 0)
1572                 return(NULL);
1573 #endif
1574
1575 #ifdef HAVE_BROKEN_READDIR
1576         /* using /usr/ucb/cc is BAD */
1577         dname = dname - 2;
1578 #endif
1579
1580         {
1581                 static pstring buf;
1582                 int len = NAMLEN(ptr);
1583                 memcpy(buf, dname, len);
1584                 buf[len] = 0;
1585                 dname = buf;
1586         }
1587
1588         return(dname);
1589 }
1590
1591 /*******************************************************************
1592  Utility function used to decide if the last component
1593  of a path matches a (possibly wildcarded) entry in a namelist.
1594 ********************************************************************/
1595
1596 BOOL is_in_path(const char *name, name_compare_entry *namelist, BOOL case_sensitive)
1597 {
1598         pstring last_component;
1599         char *p;
1600
1601         /* if we have no list it's obviously not in the path */
1602         if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL))) {
1603                 return False;
1604         }
1605
1606         DEBUG(8, ("is_in_path: %s\n", name));
1607
1608         /* Get the last component of the unix name. */
1609         p = strrchr_m(name, '/');
1610         strncpy(last_component, p ? ++p : name, sizeof(last_component)-1);
1611         last_component[sizeof(last_component)-1] = '\0';
1612
1613         for(; namelist->name != NULL; namelist++) {
1614                 if(namelist->is_wild) {
1615                         if (mask_match(last_component, namelist->name, case_sensitive)) {
1616                                 DEBUG(8,("is_in_path: mask match succeeded\n"));
1617                                 return True;
1618                         }
1619                 } else {
1620                         if((case_sensitive && (strcmp(last_component, namelist->name) == 0))||
1621                                                 (!case_sensitive && (StrCaseCmp(last_component, namelist->name) == 0))) {
1622                                 DEBUG(8,("is_in_path: match succeeded\n"));
1623                                 return True;
1624                         }
1625                 }
1626         }
1627         DEBUG(8,("is_in_path: match not found\n"));
1628
1629         return False;
1630 }
1631
1632 /*******************************************************************
1633  Strip a '/' separated list into an array of
1634  name_compare_enties structures suitable for
1635  passing to is_in_path(). We do this for
1636  speed so we can pre-parse all the names in the list
1637  and don't do it for each call to is_in_path().
1638  namelist is modified here and is assumed to be
1639  a copy owned by the caller.
1640  We also check if the entry contains a wildcard to
1641  remove a potentially expensive call to mask_match
1642  if possible.
1643 ********************************************************************/
1644
1645 void set_namearray(name_compare_entry **ppname_array, char *namelist)
1646 {
1647         char *name_end;
1648         char *nameptr = namelist;
1649         int num_entries = 0;
1650         int i;
1651
1652         (*ppname_array) = NULL;
1653
1654         if((nameptr == NULL ) || ((nameptr != NULL) && (*nameptr == '\0')))
1655                 return;
1656
1657         /* We need to make two passes over the string. The
1658                 first to count the number of elements, the second
1659                 to split it.
1660         */
1661
1662         while(*nameptr) {
1663                 if ( *nameptr == '/' ) {
1664                         /* cope with multiple (useless) /s) */
1665                         nameptr++;
1666                         continue;
1667                 }
1668                 /* find the next / */
1669                 name_end = strchr_m(nameptr, '/');
1670
1671                 /* oops - the last check for a / didn't find one. */
1672                 if (name_end == NULL)
1673                         break;
1674
1675                 /* next segment please */
1676                 nameptr = name_end + 1;
1677                 num_entries++;
1678         }
1679
1680         if(num_entries == 0)
1681                 return;
1682
1683         if(( (*ppname_array) = SMB_MALLOC_ARRAY(name_compare_entry, num_entries + 1)) == NULL) {
1684                 DEBUG(0,("set_namearray: malloc fail\n"));
1685                 return;
1686         }
1687
1688         /* Now copy out the names */
1689         nameptr = namelist;
1690         i = 0;
1691         while(*nameptr) {
1692                 if ( *nameptr == '/' ) {
1693                         /* cope with multiple (useless) /s) */
1694                         nameptr++;
1695                         continue;
1696                 }
1697                 /* find the next / */
1698                 if ((name_end = strchr_m(nameptr, '/')) != NULL)
1699                         *name_end = 0;
1700
1701                 /* oops - the last check for a / didn't find one. */
1702                 if(name_end == NULL)
1703                         break;
1704
1705                 (*ppname_array)[i].is_wild = ms_has_wild(nameptr);
1706                 if(((*ppname_array)[i].name = SMB_STRDUP(nameptr)) == NULL) {
1707                         DEBUG(0,("set_namearray: malloc fail (1)\n"));
1708                         return;
1709                 }
1710
1711                 /* next segment please */
1712                 nameptr = name_end + 1;
1713                 i++;
1714         }
1715
1716         (*ppname_array)[i].name = NULL;
1717
1718         return;
1719 }
1720
1721 /****************************************************************************
1722  Routine to free a namearray.
1723 ****************************************************************************/
1724
1725 void free_namearray(name_compare_entry *name_array)
1726 {
1727         int i;
1728
1729         if(name_array == NULL)
1730                 return;
1731
1732         for(i=0; name_array[i].name!=NULL; i++)
1733                 SAFE_FREE(name_array[i].name);
1734         SAFE_FREE(name_array);
1735 }
1736
1737 /****************************************************************************
1738  Simple routine to do POSIX file locking. Cruft in NFS and 64->32 bit mapping
1739  is dealt with in posix.c
1740 ****************************************************************************/
1741
1742 BOOL fcntl_lock(int fd, int op, SMB_OFF_T offset, SMB_OFF_T count, int type)
1743 {
1744         SMB_STRUCT_FLOCK lock;
1745         int ret;
1746
1747         DEBUG(8,("fcntl_lock %d %d %.0f %.0f %d\n",fd,op,(double)offset,(double)count,type));
1748
1749         lock.l_type = type;
1750         lock.l_whence = SEEK_SET;
1751         lock.l_start = offset;
1752         lock.l_len = count;
1753         lock.l_pid = 0;
1754
1755         ret = sys_fcntl_ptr(fd,op,&lock);
1756
1757         if (ret == -1 && errno != 0)
1758                 DEBUG(3,("fcntl_lock: fcntl lock gave errno %d (%s)\n",errno,strerror(errno)));
1759
1760         /* a lock query */
1761         if (op == SMB_F_GETLK) {
1762                 if ((ret != -1) &&
1763                                 (lock.l_type != F_UNLCK) &&
1764                                 (lock.l_pid != 0) &&
1765                                 (lock.l_pid != sys_getpid())) {
1766                         DEBUG(3,("fcntl_lock: fd %d is locked by pid %d\n",fd,(int)lock.l_pid));
1767                         return(True);
1768                 }
1769
1770                 /* it must be not locked or locked by me */
1771                 return(False);
1772         }
1773
1774         /* a lock set or unset */
1775         if (ret == -1) {
1776                 DEBUG(3,("fcntl_lock: lock failed at offset %.0f count %.0f op %d type %d (%s)\n",
1777                         (double)offset,(double)count,op,type,strerror(errno)));
1778                 return(False);
1779         }
1780
1781         /* everything went OK */
1782         DEBUG(8,("fcntl_lock: Lock call successful\n"));
1783
1784         return(True);
1785 }
1786
1787 /*******************************************************************
1788  Is the name specified one of my netbios names.
1789  Returns true if it is equal, false otherwise.
1790 ********************************************************************/
1791
1792 BOOL is_myname(const char *s)
1793 {
1794         int n;
1795         BOOL ret = False;
1796
1797         for (n=0; my_netbios_names(n); n++) {
1798                 if (strequal(my_netbios_names(n), s)) {
1799                         ret=True;
1800                         break;
1801                 }
1802         }
1803         DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret));
1804         return(ret);
1805 }
1806
1807 BOOL is_myname_or_ipaddr(const char *s)
1808 {
1809         fstring name, dnsname;
1810         char *servername;
1811
1812         if ( !s )
1813                 return False;
1814
1815         /* santize the string from '\\name' */
1816
1817         fstrcpy( name, s );
1818
1819         servername = strrchr_m( name, '\\' );
1820         if ( !servername )
1821                 servername = name;
1822         else
1823                 servername++;
1824
1825         /* optimize for the common case */
1826
1827         if (strequal(servername, global_myname()))
1828                 return True;
1829
1830         /* check for an alias */
1831
1832         if (is_myname(servername))
1833                 return True;
1834
1835         /* check for loopback */
1836
1837         if (strequal(servername, "localhost"))
1838                 return True;
1839
1840         /* maybe it's my dns name */
1841
1842         if ( get_mydnsfullname( dnsname ) )
1843                 if ( strequal( servername, dnsname ) )
1844                         return True;
1845
1846         /* handle possible CNAME records */
1847
1848         if ( !is_ipaddress( servername ) ) {
1849                 /* use DNS to resolve the name, but only the first address */
1850                 struct hostent *hp;
1851
1852                 if (((hp = sys_gethostbyname(name)) != NULL) && (hp->h_addr != NULL)) {
1853                         struct in_addr return_ip;
1854                         putip( (char*)&return_ip, (char*)hp->h_addr );
1855                         fstrcpy( name, inet_ntoa( return_ip ) );
1856                         servername = name;
1857                 }
1858         }
1859
1860         /* maybe its an IP address? */
1861         if (is_ipaddress(servername)) {
1862                 struct iface_struct nics[MAX_INTERFACES];
1863                 int i, n;
1864                 uint32 ip;
1865
1866                 ip = interpret_addr(servername);
1867                 if ((ip==0) || (ip==0xffffffff))
1868                         return False;
1869
1870                 n = get_interfaces(nics, MAX_INTERFACES);
1871                 for (i=0; i<n; i++) {
1872                         if (ip == nics[i].ip.s_addr)
1873                                 return True;
1874                 }
1875         }
1876
1877         /* no match */
1878         return False;
1879 }
1880
1881 /*******************************************************************
1882  Is the name specified our workgroup/domain.
1883  Returns true if it is equal, false otherwise.
1884 ********************************************************************/
1885
1886 BOOL is_myworkgroup(const char *s)
1887 {
1888         BOOL ret = False;
1889
1890         if (strequal(s, lp_workgroup())) {
1891                 ret=True;
1892         }
1893
1894         DEBUG(8, ("is_myworkgroup(\"%s\") returns %d\n", s, ret));
1895         return(ret);
1896 }
1897
1898 /*******************************************************************
1899  we distinguish between 2K and XP by the "Native Lan Manager" string
1900    WinXP => "Windows 2002 5.1"
1901    Win2k => "Windows 2000 5.0"
1902    NT4   => "Windows NT 4.0"
1903    Win9x => "Windows 4.0"
1904  Windows 2003 doesn't set the native lan manager string but
1905  they do set the domain to "Windows 2003 5.2" (probably a bug).
1906 ********************************************************************/
1907
1908 void ra_lanman_string( const char *native_lanman )
1909 {
1910         if ( strcmp( native_lanman, "Windows 2002 5.1" ) == 0 )
1911                 set_remote_arch( RA_WINXP );
1912         else if ( strcmp( native_lanman, "Windows Server 2003 5.2" ) == 0 )
1913                 set_remote_arch( RA_WIN2K3 );
1914 }
1915
1916 /*******************************************************************
1917  Set the horrid remote_arch string based on an enum.
1918 ********************************************************************/
1919
1920 void set_remote_arch(enum remote_arch_types type)
1921 {
1922         extern fstring remote_arch;
1923         ra_type = type;
1924         switch( type ) {
1925         case RA_WFWG:
1926                 fstrcpy(remote_arch, "WfWg");
1927                 break;
1928         case RA_OS2:
1929                 fstrcpy(remote_arch, "OS2");
1930                 break;
1931         case RA_WIN95:
1932                 fstrcpy(remote_arch, "Win95");
1933                 break;
1934         case RA_WINNT:
1935                 fstrcpy(remote_arch, "WinNT");
1936                 break;
1937         case RA_WIN2K:
1938                 fstrcpy(remote_arch, "Win2K");
1939                 break;
1940         case RA_WINXP:
1941                 fstrcpy(remote_arch, "WinXP");
1942                 break;
1943         case RA_WIN2K3:
1944                 fstrcpy(remote_arch, "Win2K3");
1945                 break;
1946         case RA_SAMBA:
1947                 fstrcpy(remote_arch,"Samba");
1948                 break;
1949         case RA_CIFSFS:
1950                 fstrcpy(remote_arch,"CIFSFS");
1951                 break;
1952         default:
1953                 ra_type = RA_UNKNOWN;
1954                 fstrcpy(remote_arch, "UNKNOWN");
1955                 break;
1956         }
1957
1958         DEBUG(10,("set_remote_arch: Client arch is \'%s\'\n", remote_arch));
1959 }
1960
1961 /*******************************************************************
1962  Get the remote_arch type.
1963 ********************************************************************/
1964
1965 enum remote_arch_types get_remote_arch(void)
1966 {
1967         return ra_type;
1968 }
1969
1970 void print_asc(int level, const unsigned char *buf,int len)
1971 {
1972         int i;
1973         for (i=0;i<len;i++)
1974                 DEBUG(level,("%c", isprint(buf[i])?buf[i]:'.'));
1975 }
1976
1977 void dump_data(int level, const char *buf1,int len)
1978 {
1979         const unsigned char *buf = (const unsigned char *)buf1;
1980         int i=0;
1981         if (len<=0) return;
1982
1983         if (!DEBUGLVL(level)) return;
1984
1985         DEBUGADD(level,("[%03X] ",i));
1986         for (i=0;i<len;) {
1987                 DEBUGADD(level,("%02X ",(int)buf[i]));
1988                 i++;
1989                 if (i%8 == 0) DEBUGADD(level,(" "));
1990                 if (i%16 == 0) {
1991                         print_asc(level,&buf[i-16],8); DEBUGADD(level,(" "));
1992                         print_asc(level,&buf[i-8],8); DEBUGADD(level,("\n"));
1993                         if (i<len) DEBUGADD(level,("[%03X] ",i));
1994                 }
1995         }
1996         if (i%16) {
1997                 int n;
1998                 n = 16 - (i%16);
1999                 DEBUGADD(level,(" "));
2000                 if (n>8) DEBUGADD(level,(" "));
2001                 while (n--) DEBUGADD(level,("   "));
2002                 n = MIN(8,i%16);
2003                 print_asc(level,&buf[i-(i%16)],n); DEBUGADD(level,( " " ));
2004                 n = (i%16) - n;
2005                 if (n>0) print_asc(level,&buf[i-n],n);
2006                 DEBUGADD(level,("\n"));
2007         }
2008 }
2009
2010 void dump_data_pw(const char *msg, const uchar * data, size_t len)
2011 {
2012 #ifdef DEBUG_PASSWORD
2013         DEBUG(11, ("%s", msg));
2014         if (data != NULL && len > 0)
2015         {
2016                 dump_data(11, data, len);
2017         }
2018 #endif
2019 }
2020
2021 char *tab_depth(int depth)
2022 {
2023         static pstring spaces;
2024         memset(spaces, ' ', depth * 4);
2025         spaces[depth * 4] = 0;
2026         return spaces;
2027 }
2028
2029 /*****************************************************************************
2030  Provide a checksum on a string
2031
2032  Input:  s - the null-terminated character string for which the checksum
2033              will be calculated.
2034
2035   Output: The checksum value calculated for s.
2036 *****************************************************************************/
2037
2038 int str_checksum(const char *s)
2039 {
2040         int res = 0;
2041         int c;
2042         int i=0;
2043
2044         while(*s) {
2045                 c = *s;
2046                 res ^= (c << (i % 15)) ^ (c >> (15-(i%15)));
2047                 s++;
2048                 i++;
2049         }
2050         return(res);
2051 }
2052
2053 /*****************************************************************
2054  Zero a memory area then free it. Used to catch bugs faster.
2055 *****************************************************************/
2056
2057 void zero_free(void *p, size_t size)
2058 {
2059         memset(p, 0, size);
2060         SAFE_FREE(p);
2061 }
2062
2063 /*****************************************************************
2064  Set our open file limit to a requested max and return the limit.
2065 *****************************************************************/
2066
2067 int set_maxfiles(int requested_max)
2068 {
2069 #if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE))
2070         struct rlimit rlp;
2071         int saved_current_limit;
2072
2073         if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2074                 DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n",
2075                         strerror(errno) ));
2076                 /* just guess... */
2077                 return requested_max;
2078         }
2079
2080         /*
2081          * Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to
2082          * account for the extra fd we need
2083          * as well as the log files and standard
2084          * handles etc. Save the limit we want to set in case
2085          * we are running on an OS that doesn't support this limit (AIX)
2086          * which always returns RLIM_INFINITY for rlp.rlim_max.
2087          */
2088
2089         /* Try raising the hard (max) limit to the requested amount. */
2090
2091 #if defined(RLIM_INFINITY)
2092         if (rlp.rlim_max != RLIM_INFINITY) {
2093                 int orig_max = rlp.rlim_max;
2094
2095                 if ( rlp.rlim_max < requested_max )
2096                         rlp.rlim_max = requested_max;
2097
2098                 /* This failing is not an error - many systems (Linux) don't
2099                         support our default request of 10,000 open files. JRA. */
2100
2101                 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2102                         DEBUG(3,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d max files failed with error %s\n",
2103                                 (int)rlp.rlim_max, strerror(errno) ));
2104
2105                         /* Set failed - restore original value from get. */
2106                         rlp.rlim_max = orig_max;
2107                 }
2108         }
2109 #endif
2110
2111         /* Now try setting the soft (current) limit. */
2112
2113         saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);
2114
2115         if(setrlimit(RLIMIT_NOFILE, &rlp)) {
2116                 DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n",
2117                         (int)rlp.rlim_cur, strerror(errno) ));
2118                 /* just guess... */
2119                 return saved_current_limit;
2120         }
2121
2122         if(getrlimit(RLIMIT_NOFILE, &rlp)) {
2123                 DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n",
2124                         strerror(errno) ));
2125                 /* just guess... */
2126                 return saved_current_limit;
2127     }
2128
2129 #if defined(RLIM_INFINITY)
2130         if(rlp.rlim_cur == RLIM_INFINITY)
2131                 return saved_current_limit;
2132 #endif
2133
2134         if((int)rlp.rlim_cur > saved_current_limit)
2135                 return saved_current_limit;
2136
2137         return rlp.rlim_cur;
2138 #else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */
2139         /*
2140          * No way to know - just guess...
2141          */
2142         return requested_max;
2143 #endif
2144 }
2145
2146 /*****************************************************************
2147  Splits out the start of the key (HKLM or HKU) and the rest of the key.
2148 *****************************************************************/
2149
2150 BOOL reg_split_key(const char *full_keyname, uint32 *reg_type, char *key_name)
2151 {
2152         pstring tmp;
2153
2154         if (!next_token(&full_keyname, tmp, "\\", sizeof(tmp)))
2155                 return False;
2156
2157         (*reg_type) = 0;
2158
2159         DEBUG(10, ("reg_split_key: hive %s\n", tmp));
2160
2161         if (strequal(tmp, "HKLM") || strequal(tmp, "HKEY_LOCAL_MACHINE"))
2162                 (*reg_type) = HKEY_LOCAL_MACHINE;
2163         else if (strequal(tmp, "HKCR") || strequal(tmp, "HKEY_CLASSES_ROOT"))
2164                 (*reg_type) = HKEY_CLASSES_ROOT;
2165         else if (strequal(tmp, "HKU") || strequal(tmp, "HKEY_USERS"))
2166                 (*reg_type) = HKEY_USERS;
2167         else if (strequal(tmp, "HKPD")||strequal(tmp, "HKEY_PERFORMANCE_DATA"))
2168                 (*reg_type) = HKEY_PERFORMANCE_DATA;
2169         else {
2170                 DEBUG(10,("reg_split_key: unrecognised hive key %s\n", tmp));
2171                 return False;
2172         }
2173
2174         if (next_token(&full_keyname, tmp, "\n\r", sizeof(tmp)))
2175                 fstrcpy(key_name, tmp);
2176         else
2177                 key_name[0] = 0;
2178
2179         DEBUG(10, ("reg_split_key: name %s\n", key_name));
2180
2181         return True;
2182 }
2183
2184 /*****************************************************************
2185  Possibly replace mkstemp if it is broken.
2186 *****************************************************************/
2187
2188 int smb_mkstemp(char *template)
2189 {
2190 #if HAVE_SECURE_MKSTEMP
2191         return mkstemp(template);
2192 #else
2193         /* have a reasonable go at emulating it. Hope that
2194            the system mktemp() isn't completly hopeless */
2195         char *p = mktemp(template);
2196         if (!p)
2197                 return -1;
2198         return open(p, O_CREAT|O_EXCL|O_RDWR, 0600);
2199 #endif
2200 }
2201
2202 /*****************************************************************
2203  malloc that aborts with smb_panic on fail or zero size.
2204  *****************************************************************/
2205
2206 void *smb_xmalloc_array(size_t size, unsigned int count)
2207 {
2208         void *p;
2209         if (size == 0)
2210                 smb_panic("smb_xmalloc_array: called with zero size.\n");
2211         if (count >= MAX_ALLOC_SIZE/size) {
2212                 smb_panic("smb_xmalloc: alloc size too large.\n");
2213         }
2214         if ((p = SMB_MALLOC(size*count)) == NULL) {
2215                 DEBUG(0, ("smb_xmalloc_array failed to allocate %lu * %lu bytes\n",
2216                         (unsigned long)size, (unsigned long)count));
2217                 smb_panic("smb_xmalloc_array: malloc fail.\n");
2218         }
2219         return p;
2220 }
2221
2222 /**
2223  Memdup with smb_panic on fail.
2224 **/
2225
2226 void *smb_xmemdup(const void *p, size_t size)
2227 {
2228         void *p2;
2229         p2 = SMB_XMALLOC_ARRAY(unsigned char,size);
2230         memcpy(p2, p, size);
2231         return p2;
2232 }
2233
2234 /**
2235  strdup that aborts on malloc fail.
2236 **/
2237
2238 char *smb_xstrdup(const char *s)
2239 {
2240 #if defined(PARANOID_MALLOC_CHECKER)
2241 #ifdef strdup
2242 #undef strdup
2243 #endif
2244 #endif
2245         char *s1 = strdup(s);
2246 #if defined(PARANOID_MALLOC_CHECKER)
2247 #define strdup(s) __ERROR_DONT_USE_STRDUP_DIRECTLY
2248 #endif
2249         if (!s1)
2250                 smb_panic("smb_xstrdup: malloc fail\n");
2251         return s1;
2252
2253 }
2254
2255 /**
2256  strndup that aborts on malloc fail.
2257 **/
2258
2259 char *smb_xstrndup(const char *s, size_t n)
2260 {
2261 #if defined(PARANOID_MALLOC_CHECKER)
2262 #ifdef strndup
2263 #undef strndup
2264 #endif
2265 #endif
2266         char *s1 = strndup(s, n);
2267 #if defined(PARANOID_MALLOC_CHECKER)
2268 #define strndup(s,n) __ERROR_DONT_USE_STRNDUP_DIRECTLY
2269 #endif
2270         if (!s1)
2271                 smb_panic("smb_xstrndup: malloc fail\n");
2272         return s1;
2273 }
2274
2275 /*
2276   vasprintf that aborts on malloc fail
2277 */
2278
2279  int smb_xvasprintf(char **ptr, const char *format, va_list ap)
2280 {
2281         int n;
2282         va_list ap2;
2283
2284         VA_COPY(ap2, ap);
2285
2286         n = vasprintf(ptr, format, ap2);
2287         if (n == -1 || ! *ptr)
2288                 smb_panic("smb_xvasprintf: out of memory");
2289         return n;
2290 }
2291
2292 /*****************************************************************
2293  Like strdup but for memory.
2294 *****************************************************************/
2295
2296 void *memdup(const void *p, size_t size)
2297 {
2298         void *p2;
2299         if (size == 0)
2300                 return NULL;
2301         p2 = SMB_MALLOC(size);
2302         if (!p2)
2303                 return NULL;
2304         memcpy(p2, p, size);
2305         return p2;
2306 }
2307
2308 /*****************************************************************
2309  Get local hostname and cache result.
2310 *****************************************************************/
2311
2312 char *myhostname(void)
2313 {
2314         static pstring ret;
2315         if (ret[0] == 0)
2316                 get_myname(ret);
2317         return ret;
2318 }
2319
2320 /*****************************************************************
2321  A useful function for returning a path in the Samba lock directory.
2322 *****************************************************************/
2323
2324 char *lock_path(const char *name)
2325 {
2326         static pstring fname;
2327
2328         pstrcpy(fname,lp_lockdir());
2329         trim_char(fname,'\0','/');
2330
2331         if (!directory_exist(fname,NULL))
2332                 mkdir(fname,0755);
2333
2334         pstrcat(fname,"/");
2335         pstrcat(fname,name);
2336
2337         return fname;
2338 }
2339
2340 /*****************************************************************
2341  A useful function for returning a path in the Samba pid directory.
2342 *****************************************************************/
2343
2344 char *pid_path(const char *name)
2345 {
2346         static pstring fname;
2347
2348         pstrcpy(fname,lp_piddir());
2349         trim_char(fname,'\0','/');
2350
2351         if (!directory_exist(fname,NULL))
2352                 mkdir(fname,0755);
2353
2354         pstrcat(fname,"/");
2355         pstrcat(fname,name);
2356
2357         return fname;
2358 }
2359
2360 /**
2361  * @brief Returns an absolute path to a file in the Samba lib directory.
2362  *
2363  * @param name File to find, relative to LIBDIR.
2364  *
2365  * @retval Pointer to a static #pstring containing the full path.
2366  **/
2367
2368 char *lib_path(const char *name)
2369 {
2370         static pstring fname;
2371         fstr_sprintf(fname, "%s/%s", dyn_LIBDIR, name);
2372         return fname;
2373 }
2374
2375 /**
2376  * @brief Returns the platform specific shared library extension.
2377  *
2378  * @retval Pointer to a static #fstring containing the extension.
2379  **/
2380
2381 const char *shlib_ext(void)
2382 {
2383   return dyn_SHLIBEXT;
2384 }
2385
2386 /*******************************************************************
2387  Given a filename - get its directory name
2388  NB: Returned in static storage.  Caveats:
2389  o  Not safe in thread environment.
2390  o  Caller must not free.
2391  o  If caller wishes to preserve, they should copy.
2392 ********************************************************************/
2393
2394 char *parent_dirname(const char *path)
2395 {
2396         static pstring dirpath;
2397         char *p;
2398
2399         if (!path)
2400                 return(NULL);
2401
2402         pstrcpy(dirpath, path);
2403         p = strrchr_m(dirpath, '/');  /* Find final '/', if any */
2404         if (!p) {
2405                 pstrcpy(dirpath, ".");    /* No final "/", so dir is "." */
2406         } else {
2407                 if (p == dirpath)
2408                         ++p;    /* For root "/", leave "/" in place */
2409                 *p = '\0';
2410         }
2411         return dirpath;
2412 }
2413
2414
2415 /*******************************************************************
2416  Determine if a pattern contains any Microsoft wildcard characters.
2417 *******************************************************************/
2418
2419 BOOL ms_has_wild(const char *s)
2420 {
2421         char c;
2422         while ((c = *s++)) {
2423                 switch (c) {
2424                 case '*':
2425                 case '?':
2426                 case '<':
2427                 case '>':
2428                 case '"':
2429                         return True;
2430                 }
2431         }
2432         return False;
2433 }
2434
2435 BOOL ms_has_wild_w(const smb_ucs2_t *s)
2436 {
2437         smb_ucs2_t c;
2438         if (!s) return False;
2439         while ((c = *s++)) {
2440                 switch (c) {
2441                 case UCS2_CHAR('*'):
2442                 case UCS2_CHAR('?'):
2443                 case UCS2_CHAR('<'):
2444                 case UCS2_CHAR('>'):
2445                 case UCS2_CHAR('"'):
2446                         return True;
2447                 }
2448         }
2449         return False;
2450 }
2451
2452 /*******************************************************************
2453  A wrapper that handles case sensitivity and the special handling
2454  of the ".." name.
2455 *******************************************************************/
2456
2457 BOOL mask_match(const char *string, char *pattern, BOOL is_case_sensitive)
2458 {
2459         if (strcmp(string,"..") == 0)
2460                 string = ".";
2461         if (strcmp(pattern,".") == 0)
2462                 return False;
2463
2464         return ms_fnmatch(pattern, string, Protocol <= PROTOCOL_LANMAN2, is_case_sensitive) == 0;
2465 }
2466
2467 /*******************************************************************
2468  A wrapper that handles case sensitivity and the special handling
2469  of the ".." name. Varient that is only called by old search code which requires
2470  pattern translation.
2471 *******************************************************************/
2472
2473 BOOL mask_match_search(const char *string, char *pattern, BOOL is_case_sensitive)
2474 {
2475         if (strcmp(string,"..") == 0)
2476                 string = ".";
2477         if (strcmp(pattern,".") == 0)
2478                 return False;
2479
2480         return ms_fnmatch(pattern, string, True, is_case_sensitive) == 0;
2481 }
2482
2483 /*******************************************************************
2484  A wrapper that handles a list of patters and calls mask_match()
2485  on each.  Returns True if any of the patterns match.
2486 *******************************************************************/
2487
2488 BOOL mask_match_list(const char *string, char **list, int listLen, BOOL is_case_sensitive)
2489 {
2490        while (listLen-- > 0) {
2491                if (mask_match(string, *list++, is_case_sensitive))
2492                        return True;
2493        }
2494        return False;
2495 }
2496
2497 /*********************************************************
2498  Recursive routine that is called by unix_wild_match.
2499 *********************************************************/
2500
2501 static BOOL unix_do_match(const char *regexp, const char *str)
2502 {
2503         const char *p;
2504
2505         for( p = regexp; *p && *str; ) {
2506
2507                 switch(*p) {
2508                         case '?':
2509                                 str++;
2510                                 p++;
2511                                 break;
2512
2513                         case '*':
2514
2515                                 /*
2516                                  * Look for a character matching
2517                                  * the one after the '*'.
2518                                  */
2519                                 p++;
2520                                 if(!*p)
2521                                         return True; /* Automatic match */
2522                                 while(*str) {
2523
2524                                         while(*str && (*p != *str))
2525                                                 str++;
2526
2527                                         /*
2528                                          * Patch from weidel@multichart.de. In the case of the regexp
2529                                          * '*XX*' we want to ensure there are at least 2 'X' characters
2530                                          * in the string after the '*' for a match to be made.
2531                                          */
2532
2533                                         {
2534                                                 int matchcount=0;
2535
2536                                                 /*
2537                                                  * Eat all the characters that match, but count how many there were.
2538                                                  */
2539
2540                                                 while(*str && (*p == *str)) {
2541                                                         str++;
2542                                                         matchcount++;
2543                                                 }
2544
2545                                                 /*
2546                                                  * Now check that if the regexp had n identical characters that
2547                                                  * matchcount had at least that many matches.
2548                                                  */
2549
2550                                                 while ( *(p+1) && (*(p+1) == *p)) {
2551                                                         p++;
2552                                                         matchcount--;
2553                                                 }
2554
2555                                                 if ( matchcount <= 0 )
2556                                                         return False;
2557                                         }
2558
2559                                         str--; /* We've eaten the match char after the '*' */
2560
2561                                         if(unix_do_match(p, str))
2562                                                 return True;
2563
2564                                         if(!*str)
2565                                                 return False;
2566                                         else
2567                                                 str++;
2568                                 }
2569                                 return False;
2570
2571                         default:
2572                                 if(*str != *p)
2573                                         return False;
2574                                 str++;
2575                                 p++;
2576                                 break;
2577                 }
2578         }
2579
2580         if(!*p && !*str)
2581                 return True;
2582
2583         if (!*p && str[0] == '.' && str[1] == 0)
2584                 return(True);
2585
2586         if (!*str && *p == '?') {
2587                 while (*p == '?')
2588                         p++;
2589                 return(!*p);
2590         }
2591
2592         if(!*str && (*p == '*' && p[1] == '\0'))
2593                 return True;
2594
2595         return False;
2596 }
2597
2598 /*******************************************************************
2599  Simple case insensitive interface to a UNIX wildcard matcher.
2600 *******************************************************************/
2601
2602 BOOL unix_wild_match(const char *pattern, const char *string)
2603 {
2604         pstring p2, s2;
2605         char *p;
2606
2607         pstrcpy(p2, pattern);
2608         pstrcpy(s2, string);
2609         strlower_m(p2);
2610         strlower_m(s2);
2611
2612         /* Remove any *? and ** from the pattern as they are meaningless */
2613         for(p = p2; *p; p++)
2614                 while( *p == '*' && (p[1] == '?' ||p[1] == '*'))
2615                         pstrcpy( &p[1], &p[2]);
2616
2617         if (strequal(p2,"*"))
2618                 return True;
2619
2620         return unix_do_match(p2, s2) == 0;
2621 }
2622
2623 /**********************************************************************
2624  Converts a name to a fully qalified domain name.
2625 ***********************************************************************/
2626
2627 void name_to_fqdn(fstring fqdn, const char *name)
2628 {
2629         struct hostent *hp = sys_gethostbyname(name);
2630         if ( hp && hp->h_name && *hp->h_name ) {
2631                 DEBUG(10,("name_to_fqdn: lookup for %s -> %s.\n", name, hp->h_name));
2632                 fstrcpy(fqdn,hp->h_name);
2633         } else {
2634                 DEBUG(10,("name_to_fqdn: lookup for %s failed.\n", name));
2635                 fstrcpy(fqdn, name);
2636         }
2637 }
2638
2639 #ifdef __INSURE__
2640
2641 /*******************************************************************
2642 This routine is a trick to immediately catch errors when debugging
2643 with insure. A xterm with a gdb is popped up when insure catches
2644 a error. It is Linux specific.
2645 ********************************************************************/
2646
2647 int _Insure_trap_error(int a1, int a2, int a3, int a4, int a5, int a6)
2648 {
2649         static int (*fn)();
2650         int ret;
2651         char pidstr[10];
2652         /* you can get /usr/bin/backtrace from
2653            http://samba.org/ftp/unpacked/junkcode/backtrace */
2654         pstring cmd = "/usr/bin/backtrace %d";
2655
2656         slprintf(pidstr, sizeof(pidstr)-1, "%d", sys_getpid());
2657         pstring_sub(cmd, "%d", pidstr);
2658
2659         if (!fn) {
2660                 static void *h;
2661                 h = dlopen("/usr/local/parasoft/insure++lite/lib.linux2/libinsure.so", RTLD_LAZY);
2662                 fn = dlsym(h, "_Insure_trap_error");
2663
2664                 if (!h || h == _Insure_trap_error) {
2665                         h = dlopen("/usr/local/parasoft/lib.linux2/libinsure.so", RTLD_LAZY);
2666                         fn = dlsym(h, "_Insure_trap_error");
2667                 }
2668         }
2669
2670         ret = fn(a1, a2, a3, a4, a5, a6);
2671
2672         system(cmd);
2673
2674         return ret;
2675 }
2676 #endif