source/lib/util.c

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