source/lib/util.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 1.9.
   4    Samba utility functions
   5    Copyright (C) Andrew Tridgell 1992-1998
   6    Copyright (C) Jeremy Allison 2001
   7    Copyright (C) Simo Sorce 2001
   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 #if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))
  27 #ifdef WITH_NISPLUS_HOME
  28 #ifdef BROKEN_NISPLUS_INCLUDE_FILES
  29 /*
  30  * The following lines are needed due to buggy include files
  31  * in Solaris 2.6 which define GROUP in both /usr/include/sys/acl.h and
  32  * also in /usr/include/rpcsvc/nis.h. The definitions conflict. JRA.
  33  * Also GROUP_OBJ is defined as 0x4 in /usr/include/sys/acl.h and as
  34  * an enum in /usr/include/rpcsvc/nis.h.
  35  */
  36
  37 #if defined(GROUP)
  38 #undef GROUP
  39 #endif
  40
  41 #if defined(GROUP_OBJ)
  42 #undef GROUP_OBJ
  43 #endif
  44
  45 #endif /* BROKEN_NISPLUS_INCLUDE_FILES */
  46
  47 #include <rpcsvc/nis.h>
  48
  49 #endif /* WITH_NISPLUS_HOME */
  50 #endif /* HAVE_NETGROUP && WITH_AUTOMOUNT */
  51
  52 #ifdef WITH_SSL
  53 #include <openssl/ssl.h>
  54 #undef Realloc  /* SSLeay defines this and samba has a function of this name */
  55 extern SSL  *ssl;
  56 extern int  sslFd;
  57 #endif  /* WITH_SSL */
  58
  59 int Protocol = PROTOCOL_COREPLUS;
  60
  61 /* a default finfo structure to ensure all fields are sensible */
  62 file_info def_finfo = {-1,0,0,0,0,0,0,"",""};
  63
  64 /* this is used by the chaining code */
  65 int chain_size = 0;
  66
  67 int trans_num = 0;
  68
  69 /*
  70    case handling on filenames
  71 */
  72 int case_default = CASE_LOWER;
  73
  74 /* the following control case operations - they are put here so the
  75    client can link easily */
  76 BOOL case_sensitive;
  77 BOOL case_preserve;
  78 BOOL use_mangled_map = False;
  79 BOOL short_case_preserve;
  80 BOOL case_mangle;
  81
  82 static enum remote_arch_types ra_type = RA_UNKNOWN;
  83 pstring user_socket_options=DEFAULT_SOCKET_OPTIONS;
  84
  85 pstring global_myname = "";
  86 fstring global_myworkgroup = "";
  87 char **my_netbios_names;
  88
  89
  90 /****************************************************************************
  91  Find a suitable temporary directory. The result should be copied immediately
  92  as it may be overwritten by a subsequent call.
  93 ****************************************************************************/
  94
  95 char *tmpdir(void)
  96 {
  97         char *p;
  98         if ((p = getenv("TMPDIR")))
  99                 return p;
 100         return "/tmp";
 101 }
 102
 103 /****************************************************************************
 104  Determine whether we are in the specified group.
 105 ****************************************************************************/
 106
 107 BOOL in_group(gid_t group, gid_t current_gid, int ngroups, gid_t *groups)
 108 {
 109         int i;
 110
 111         if (group == current_gid)
 112                 return(True);
 113
 114         for (i=0;i<ngroups;i++)
 115                 if (group == groups[i])
 116                         return(True);
 117
 118         return(False);
 119 }
 120
 121 /****************************************************************************
 122  Like atoi but gets the value up to the separater character.
 123 ****************************************************************************/
 124
 125 char *Atoic(char *p, int *n, char *c)
 126 {
 127         if (!isdigit((int)*p)) {
 128                 DEBUG(5, ("Atoic: malformed number\n"));
 129                 return NULL;
 130         }
 131
 132         (*n) = atoi(p);
 133
 134         while ((*p) && isdigit((int)*p))
 135                 p++;
 136
 137         if (strchr(c, *p) == NULL) {
 138                 DEBUG(5, ("Atoic: no separator characters (%s) not found\n", c));
 139                 return NULL;
 140         }
 141
 142         return p;
 143 }
 144
 145 /*************************************************************************
 146  Reads a list of numbers.
 147  *************************************************************************/
 148
 149 char *get_numlist(char *p, uint32 **num, int *count)
 150 {
 151         int val;
 152
 153         if (num == NULL || count == NULL)
 154                 return NULL;
 155
 156         (*count) = 0;
 157         (*num  ) = NULL;
 158
 159         while ((p = Atoic(p, &val, ":,")) != NULL && (*p) != ':') {
 160                 uint32 *tn;
 161
 162                 tn = Realloc((*num), ((*count)+1) * sizeof(uint32));
 163                 if (tn == NULL)
 164                 {
 165                         SAFE_FREE(*num);
 166                         return NULL;
 167                 } else
 168                         (*num) = tn;
 169                 (*num)[(*count)] = val;
 170                 (*count)++;
 171                 p++;
 172         }
 173
 174         return p;
 175 }
 176
 177 /*******************************************************************
 178  Check if a file exists - call vfs_file_exist for samba files.
 179 ********************************************************************/
 180
 181 BOOL file_exist(char *fname,SMB_STRUCT_STAT *sbuf)
 182 {
 183         SMB_STRUCT_STAT st;
 184         if (!sbuf)
 185                 sbuf = &st;
 186
 187         if (sys_stat(fname,sbuf) != 0)
 188                 return(False);
 189
 190         return(S_ISREG(sbuf->st_mode));
 191 }
 192
 193 /*******************************************************************
 194  Check a files mod time.
 195 ********************************************************************/
 196
 197 time_t file_modtime(char *fname)
 198 {
 199         SMB_STRUCT_STAT st;
 200
 201         if (sys_stat(fname,&st) != 0)
 202                 return(0);
 203
 204         return(st.st_mtime);
 205 }
 206
 207 /*******************************************************************
 208  Check if a directory exists.
 209 ********************************************************************/
 210
 211 BOOL directory_exist(char *dname,SMB_STRUCT_STAT *st)
 212 {
 213   SMB_STRUCT_STAT st2;
 214   BOOL ret;
 215
 216   if (!st) st = &st2;
 217
 218   if (sys_stat(dname,st) != 0)
 219     return(False);
 220
 221   ret = S_ISDIR(st->st_mode);
 222   if(!ret)
 223     errno = ENOTDIR;
 224   return ret;
 225 }
 226
 227 /*******************************************************************
 228 returns the size in bytes of the named file
 229 ********************************************************************/
 230 SMB_OFF_T get_file_size(char *file_name)
 231 {
 232   SMB_STRUCT_STAT buf;
 233   buf.st_size = 0;
 234   if(sys_stat(file_name,&buf) != 0)
 235     return (SMB_OFF_T)-1;
 236   return(buf.st_size);
 237 }
 238
 239 /*******************************************************************
 240 return a string representing an attribute for a file
 241 ********************************************************************/
 242 char *attrib_string(uint16 mode)
 243 {
 244   static fstring attrstr;
 245
 246   attrstr[0] = 0;
 247
 248   if (mode & aVOLID) fstrcat(attrstr,"V");
 249   if (mode & aDIR) fstrcat(attrstr,"D");
 250   if (mode & aARCH) fstrcat(attrstr,"A");
 251   if (mode & aHIDDEN) fstrcat(attrstr,"H");
 252   if (mode & aSYSTEM) fstrcat(attrstr,"S");
 253   if (mode & aRONLY) fstrcat(attrstr,"R");
 254
 255   return(attrstr);
 256 }
 257
 258 /*******************************************************************
 259   show a smb message structure
 260 ********************************************************************/
 261 void show_msg(char *buf)
 262 {
 263         int i;
 264         int bcc=0;
 265
 266         if (DEBUGLEVEL < 5) return;
 267
 268         DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n",
 269                         smb_len(buf),
 270                         (int)CVAL(buf,smb_com),
 271                         (int)CVAL(buf,smb_rcls),
 272                         (int)CVAL(buf,smb_reh),
 273                         (int)SVAL(buf,smb_err),
 274                         (int)CVAL(buf,smb_flg),
 275                         (int)SVAL(buf,smb_flg2)));
 276         DEBUG(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\nsmt_wct=%d\n",
 277                         (int)SVAL(buf,smb_tid),
 278                         (int)SVAL(buf,smb_pid),
 279                         (int)SVAL(buf,smb_uid),
 280                         (int)SVAL(buf,smb_mid),
 281                         (int)CVAL(buf,smb_wct)));
 282
 283         for (i=0;i<(int)CVAL(buf,smb_wct);i++)
 284         {
 285                 DEBUG(5,("smb_vwv[%d]=%d (0x%X)\n",i,
 286                         SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i)));
 287         }
 288
 289         bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct)));
 290
 291         DEBUG(5,("smb_bcc=%d\n",bcc));
 292
 293         if (DEBUGLEVEL < 10) return;
 294
 295         if (DEBUGLEVEL < 50)
 296         {
 297                 bcc = MIN(bcc, 512);
 298         }
 299
 300         dump_data(10, smb_buf(buf), bcc);
 301 }
 302
 303 /*******************************************************************
 304   set the length and marker of an smb packet
 305 ********************************************************************/
 306 void smb_setlen(char *buf,int len)
 307 {
 308   _smb_setlen(buf,len);
 309
 310   SCVAL(buf,4,0xFF);
 311   SCVAL(buf,5,'S');
 312   SCVAL(buf,6,'M');
 313   SCVAL(buf,7,'B');
 314 }
 315
 316 /*******************************************************************
 317   setup the word count and byte count for a smb message
 318 ********************************************************************/
 319 int set_message(char *buf,int num_words,int num_bytes,BOOL zero)
 320 {
 321         if (zero)
 322                 memset(buf + smb_size,'\0',num_words*2 + num_bytes);
 323         SCVAL(buf,smb_wct,num_words);
 324         SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
 325         smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
 326         return (smb_size + num_words*2 + num_bytes);
 327 }
 328
 329 /*******************************************************************
 330   setup only the byte count for a smb message
 331 ********************************************************************/
 332 int set_message_bcc(char *buf,int num_bytes)
 333 {
 334         int num_words = CVAL(buf,smb_wct);
 335         SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
 336         smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
 337         return (smb_size + num_words*2 + num_bytes);
 338 }
 339
 340 /*******************************************************************
 341   setup only the byte count for a smb message, using the end of the
 342   message as a marker
 343 ********************************************************************/
 344 int set_message_end(void *outbuf,void *end_ptr)
 345 {
 346         return set_message_bcc((char *)outbuf,PTR_DIFF(end_ptr,smb_buf((char *)outbuf)));
 347 }
 348
 349 /*******************************************************************
 350 reduce a file name, removing .. elements.
 351 ********************************************************************/
 352 void dos_clean_name(char *s)
 353 {
 354   char *p=NULL;
 355
 356   DEBUG(3,("dos_clean_name [%s]\n",s));
 357
 358   /* remove any double slashes */
 359   all_string_sub(s, "\\\\", "\\", 0);
 360
 361   while ((p = strstr(s,"\\..\\")) != NULL)
 362     {
 363       pstring s1;
 364
 365       *p = 0;
 366       pstrcpy(s1,p+3);
 367
 368       if ((p=strrchr(s,'\\')) != NULL)
 369         *p = 0;
 370       else
 371         *s = 0;
 372       pstrcat(s,s1);
 373     }
 374
 375   trim_string(s,NULL,"\\..");
 376
 377   all_string_sub(s, "\\.\\", "\\", 0);
 378 }
 379
 380 /*******************************************************************
 381 reduce a file name, removing .. elements.
 382 ********************************************************************/
 383 void unix_clean_name(char *s)
 384 {
 385   char *p=NULL;
 386
 387   DEBUG(3,("unix_clean_name [%s]\n",s));
 388
 389   /* remove any double slashes */
 390   all_string_sub(s, "//","/", 0);
 391
 392   /* Remove leading ./ characters */
 393   if(strncmp(s, "./", 2) == 0) {
 394     trim_string(s, "./", NULL);
 395     if(*s == 0)
 396       pstrcpy(s,"./");
 397   }
 398
 399   while ((p = strstr(s,"/../")) != NULL)
 400     {
 401       pstring s1;
 402
 403       *p = 0;
 404       pstrcpy(s1,p+3);
 405
 406       if ((p=strrchr(s,'/')) != NULL)
 407         *p = 0;
 408       else
 409         *s = 0;
 410       pstrcat(s,s1);
 411     }
 412
 413   trim_string(s,NULL,"/..");
 414 }
 415
 416 /****************************************************************************
 417   make a dir struct
 418 ****************************************************************************/
 419 void make_dir_struct(char *buf,char *mask,char *fname,SMB_OFF_T size,int mode,time_t date)
 420 {
 421   char *p;
 422   pstring mask2;
 423
 424   pstrcpy(mask2,mask);
 425
 426   if ((mode & aDIR) != 0)
 427     size = 0;
 428
 429   memset(buf+1,' ',11);
 430   if ((p = strchr(mask2,'.')) != NULL)
 431     {
 432       *p = 0;
 433       memcpy(buf+1,mask2,MIN(strlen(mask2),8));
 434       memcpy(buf+9,p+1,MIN(strlen(p+1),3));
 435       *p = '.';
 436     }
 437   else
 438     memcpy(buf+1,mask2,MIN(strlen(mask2),11));
 439
 440   memset(buf+21,'\0',DIR_STRUCT_SIZE-21);
 441   SCVAL(buf,21,mode);
 442   put_dos_date(buf,22,date);
 443   SSVAL(buf,26,size & 0xFFFF);
 444   SSVAL(buf,28,(size >> 16)&0xFFFF);
 445   StrnCpy(buf+30,fname,12);
 446   if (!case_sensitive)
 447     strupper(buf+30);
 448   DEBUG(8,("put name [%s] into dir struct\n",buf+30));
 449 }
 450
 451
 452 /*******************************************************************
 453 close the low 3 fd's and open dev/null in their place
 454 ********************************************************************/
 455 void close_low_fds(void)
 456 {
 457   int fd;
 458   int i;
 459   close(0); close(1);
 460 #ifndef __INSURE__
 461   close(2);
 462 #endif
 463   /* try and use up these file descriptors, so silly
 464      library routines writing to stdout etc won't cause havoc */
 465   for (i=0;i<3;i++) {
 466     fd = sys_open("/dev/null",O_RDWR,0);
 467     if (fd < 0) fd = sys_open("/dev/null",O_WRONLY,0);
 468     if (fd < 0) {
 469       DEBUG(0,("Can't open /dev/null\n"));
 470       return;
 471     }
 472     if (fd != i) {
 473       DEBUG(0,("Didn't get file descriptor %d\n",i));
 474       return;
 475     }
 476   }
 477 }
 478
 479 /****************************************************************************
 480 Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
 481 else
 482 if SYSV use O_NDELAY
 483 if BSD use FNDELAY
 484 ****************************************************************************/
 485 int set_blocking(int fd, BOOL set)
 486 {
 487   int val;
 488 #ifdef O_NONBLOCK
 489 #define FLAG_TO_SET O_NONBLOCK
 490 #else
 491 #ifdef SYSV
 492 #define FLAG_TO_SET O_NDELAY
 493 #else /* BSD */
 494 #define FLAG_TO_SET FNDELAY
 495 #endif
 496 #endif
 497
 498   if((val = fcntl(fd, F_GETFL, 0)) == -1)
 499         return -1;
 500   if(set) /* Turn blocking on - ie. clear nonblock flag */
 501         val &= ~FLAG_TO_SET;
 502   else
 503     val |= FLAG_TO_SET;
 504   return fcntl( fd, F_SETFL, val);
 505 #undef FLAG_TO_SET
 506 }
 507
 508 /****************************************************************************
 509  Transfer some data between two fd's.
 510 ****************************************************************************/
 511
 512 #ifndef TRANSFER_BUF_SIZE
 513 #define TRANSFER_BUF_SIZE 65536
 514 #endif
 515
 516 ssize_t transfer_file_internal(int infd, int outfd, size_t n, ssize_t (*read_fn)(int, void *, size_t),
 517                                                 ssize_t (*write_fn)(int, const void *, size_t))
 518 {
 519         char *buf;
 520         size_t total = 0;
 521         ssize_t read_ret;
 522         ssize_t write_ret;
 523         size_t num_to_read_thistime;
 524         size_t num_written = 0;
 525
 526         if ((buf = malloc(TRANSFER_BUF_SIZE)) == NULL)
 527                 return -1;
 528
 529         while (total < n) {
 530                 num_to_read_thistime = MIN((n - total), TRANSFER_BUF_SIZE);
 531
 532                 read_ret = (*read_fn)(infd, buf, num_to_read_thistime);
 533                 if (read_ret == -1) {
 534                         DEBUG(0,("transfer_file_internal: read failure. Error = %s\n", strerror(errno) ));
 535                         SAFE_FREE(buf);
 536                         return -1;
 537                 }
 538                 if (read_ret == 0)
 539                         break;
 540
 541                 num_written = 0;
 542
 543                 while (num_written < read_ret) {
 544                         write_ret = (*write_fn)(outfd,buf + num_written, read_ret - num_written);
 545
 546                         if (write_ret == -1) {
 547                                 DEBUG(0,("transfer_file_internal: write failure. Error = %s\n", strerror(errno) ));
 548                                 SAFE_FREE(buf);
 549                                 return -1;
 550                         }
 551                         if (write_ret == 0)
 552                                 return (ssize_t)total;
 553
 554                         num_written += (size_t)write_ret;
 555                 }
 556
 557                 total += (size_t)read_ret;
 558         }
 559
 560         SAFE_FREE(buf);
 561         return (ssize_t)total;
 562 }
 563
 564 SMB_OFF_T transfer_file(int infd,int outfd,SMB_OFF_T n)
 565 {
 566         return (SMB_OFF_T)transfer_file_internal(infd, outfd, (size_t)n, read, write);
 567 }
 568
 569 /*******************************************************************
 570  Sleep for a specified number of milliseconds.
 571 ********************************************************************/
 572
 573 void msleep(int t)
 574 {
 575         int tdiff=0;
 576         struct timeval tval,t1,t2;
 577         fd_set fds;
 578
 579         GetTimeOfDay(&t1);
 580         GetTimeOfDay(&t2);
 581
 582         while (tdiff < t) {
 583                 tval.tv_sec = (t-tdiff)/1000;
 584                 tval.tv_usec = 1000*((t-tdiff)%1000);
 585
 586                 FD_ZERO(&fds);
 587                 errno = 0;
 588                 sys_select_intr(0,&fds,NULL,NULL,&tval);
 589
 590                 GetTimeOfDay(&t2);
 591                 tdiff = TvalDiff(&t1,&t2);
 592         }
 593 }
 594
 595 /****************************************************************************
 596  Become a daemon, discarding the controlling terminal.
 597 ****************************************************************************/
 598
 599 void become_daemon(void)
 600 {
 601         if (sys_fork()) {
 602                 _exit(0);
 603         }
 604
 605   /* detach from the terminal */
 606 #ifdef HAVE_SETSID
 607         setsid();
 608 #elif defined(TIOCNOTTY)
 609         {
 610                 int i = sys_open("/dev/tty", O_RDWR, 0);
 611                 if (i != -1) {
 612                         ioctl(i, (int) TIOCNOTTY, (char *)0);
 613                         close(i);
 614                 }
 615         }
 616 #endif /* HAVE_SETSID */
 617
 618         /* Close fd's 0,1,2. Needed if started by rsh */
 619         close_low_fds();
 620 }
 621
 622 /****************************************************************************
 623  Put up a yes/no prompt
 624 ****************************************************************************/
 625
 626 BOOL yesno(char *p)
 627 {
 628         pstring ans;
 629         printf("%s",p);
 630
 631         if (!fgets(ans,sizeof(ans)-1,stdin))
 632                 return(False);
 633
 634         if (*ans == 'y' || *ans == 'Y')
 635                 return(True);
 636
 637         return(False);
 638 }
 639
 640 /****************************************************************************
 641  Expand a pointer to be a particular size.
 642 ****************************************************************************/
 643
 644 void *Realloc(void *p,size_t size)
 645 {
 646         void *ret=NULL;
 647
 648         if (size == 0) {
 649                 SAFE_FREE(p);
 650                 DEBUG(5,("Realloc asked for 0 bytes\n"));
 651                 return NULL;
 652         }
 653
 654         if (!p)
 655                 ret = (void *)malloc(size);
 656         else
 657                 ret = (void *)realloc(p,size);
 658
 659         if (!ret)
 660                 DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",(int)size));
 661
 662         return(ret);
 663 }
 664
 665 /****************************************************************************
 666  Free memory, checks for NULL.
 667 use directly SAFE_FREE()
 668 exist only because we need to pass a function pointer somewhere --SSS
 669 ****************************************************************************/
 670
 671 void safe_free(void *p)
 672 {
 673         SAFE_FREE(p);
 674 }
 675
 676 /****************************************************************************
 677  Get my own name and IP.
 678 ****************************************************************************/
 679
 680 BOOL get_myname(char *my_name)
 681 {
 682         pstring hostname;
 683
 684         *hostname = 0;
 685
 686         /* get my host name */
 687         if (gethostname(hostname, sizeof(hostname)) == -1) {
 688                 DEBUG(0,("gethostname failed\n"));
 689                 return False;
 690         }
 691
 692         /* Ensure null termination. */
 693         hostname[sizeof(hostname)-1] = '\0';
 694
 695         if (my_name) {
 696                 /* split off any parts after an initial . */
 697                 char *p = strchr(hostname,'.');
 698                 if (p)
 699                         *p = 0;
 700
 701                 fstrcpy(my_name,hostname);
 702         }
 703
 704         return(True);
 705 }
 706
 707 /****************************************************************************
 708  Interpret a protocol description string, with a default.
 709 ****************************************************************************/
 710
 711 int interpret_protocol(char *str,int def)
 712 {
 713   if (strequal(str,"NT1"))
 714     return(PROTOCOL_NT1);
 715   if (strequal(str,"LANMAN2"))
 716     return(PROTOCOL_LANMAN2);
 717   if (strequal(str,"LANMAN1"))
 718     return(PROTOCOL_LANMAN1);
 719   if (strequal(str,"CORE"))
 720     return(PROTOCOL_CORE);
 721   if (strequal(str,"COREPLUS"))
 722     return(PROTOCOL_COREPLUS);
 723   if (strequal(str,"CORE+"))
 724     return(PROTOCOL_COREPLUS);
 725
 726   DEBUG(0,("Unrecognised protocol level %s\n",str));
 727
 728   return(def);
 729 }
 730
 731 /****************************************************************************
 732  Return true if a string could be a pure IP address.
 733 ****************************************************************************/
 734
 735 BOOL is_ipaddress(const char *str)
 736 {
 737   BOOL pure_address = True;
 738   int i;
 739
 740   for (i=0; pure_address && str[i]; i++)
 741     if (!(isdigit((int)str[i]) || str[i] == '.'))
 742       pure_address = False;
 743
 744   /* Check that a pure number is not misinterpreted as an IP */
 745   pure_address = pure_address && (strchr(str, '.') != NULL);
 746
 747   return pure_address;
 748 }
 749
 750 /****************************************************************************
 751 interpret an internet address or name into an IP address in 4 byte form
 752 ****************************************************************************/
 753
 754 uint32 interpret_addr(const char *str)
 755 {
 756   struct hostent *hp;
 757   uint32 res;
 758
 759   if (strcmp(str,"0.0.0.0") == 0) return(0);
 760   if (strcmp(str,"255.255.255.255") == 0) return(0xFFFFFFFF);
 761
 762   /* if it's in the form of an IP address then get the lib to interpret it */
 763   if (is_ipaddress(str)) {
 764     res = inet_addr(str);
 765   } else {
 766     /* otherwise assume it's a network name of some sort and use
 767        sys_gethostbyname */
 768     if ((hp = sys_gethostbyname(str)) == 0) {
 769       DEBUG(3,("sys_gethostbyname: Unknown host. %s\n",str));
 770       return 0;
 771     }
 772     if(hp->h_addr == NULL) {
 773       DEBUG(3,("sys_gethostbyname: host address is invalid for host %s\n",str));
 774       return 0;
 775     }
 776     putip((char *)&res,(char *)hp->h_addr);
 777   }
 778
 779   if (res == (uint32)-1) return(0);
 780
 781   return(res);
 782 }
 783
 784 /*******************************************************************
 785   a convenient addition to interpret_addr()
 786   ******************************************************************/
 787 struct in_addr *interpret_addr2(const char *str)
 788 {
 789   static struct in_addr ret;
 790   uint32 a = interpret_addr(str);
 791   ret.s_addr = a;
 792   return(&ret);
 793 }
 794
 795 /*******************************************************************
 796   check if an IP is the 0.0.0.0
 797   ******************************************************************/
 798 BOOL zero_ip(struct in_addr ip)
 799 {
 800   uint32 a;
 801   putip((char *)&a,(char *)&ip);
 802   return(a == 0);
 803 }
 804
 805
 806 #if (defined(HAVE_NETGROUP) && defined(WITH_AUTOMOUNT))
 807 /******************************************************************
 808  Remove any mount options such as -rsize=2048,wsize=2048 etc.
 809  Based on a fix from <Thomas.Hepper@icem.de>.
 810 *******************************************************************/
 811
 812 static void strip_mount_options( pstring *str)
 813 {
 814   if (**str == '-')
 815   {
 816     char *p = *str;
 817     while(*p && !isspace(*p))
 818       p++;
 819     while(*p && isspace(*p))
 820       p++;
 821     if(*p) {
 822       pstring tmp_str;
 823
 824       pstrcpy(tmp_str, p);
 825       pstrcpy(*str, tmp_str);
 826     }
 827   }
 828 }
 829
 830 /*******************************************************************
 831  Patch from jkf@soton.ac.uk
 832  Split Luke's automount_server into YP lookup and string splitter
 833  so can easily implement automount_path().
 834  As we may end up doing both, cache the last YP result.
 835 *******************************************************************/
 836
 837 #ifdef WITH_NISPLUS_HOME
 838 char *automount_lookup(char *user_name)
 839 {
 840   static fstring last_key = "";
 841   static pstring last_value = "";
 842
 843   char *nis_map = (char *)lp_nis_home_map_name();
 844
 845   char buffer[NIS_MAXATTRVAL + 1];
 846   nis_result *result;
 847   nis_object *object;
 848   entry_obj  *entry;
 849
 850   if (strcmp(user_name, last_key))
 851   {
 852     slprintf(buffer, sizeof(buffer)-1, "[key=%s],%s", user_name, nis_map);
 853     DEBUG(5, ("NIS+ querystring: %s\n", buffer));
 854
 855     if (result = nis_list(buffer, FOLLOW_PATH|EXPAND_NAME|HARD_LOOKUP, NULL, NULL))
 856     {
 857        if (result->status != NIS_SUCCESS)
 858       {
 859         DEBUG(3, ("NIS+ query failed: %s\n", nis_sperrno(result->status)));
 860         fstrcpy(last_key, ""); pstrcpy(last_value, "");
 861       }
 862       else
 863       {
 864         object = result->objects.objects_val;
 865         if (object->zo_data.zo_type == ENTRY_OBJ)
 866         {
 867            entry = &object->zo_data.objdata_u.en_data;
 868            DEBUG(5, ("NIS+ entry type: %s\n", entry->en_type));
 869            DEBUG(3, ("NIS+ result: %s\n", entry->en_cols.en_cols_val[1].ec_value.ec_value_val));
 870
 871            pstrcpy(last_value, entry->en_cols.en_cols_val[1].ec_value.ec_value_val);
 872            pstring_sub(last_value, "&", user_name);
 873            fstrcpy(last_key, user_name);
 874         }
 875       }
 876     }
 877     nis_freeresult(result);
 878   }
 879
 880   strip_mount_options(&last_value);
 881
 882   DEBUG(4, ("NIS+ Lookup: %s resulted in %s\n", user_name, last_value));
 883   return last_value;
 884 }
 885 #else /* WITH_NISPLUS_HOME */
 886 char *automount_lookup(char *user_name)
 887 {
 888   static fstring last_key = "";
 889   static pstring last_value = "";
 890
 891   int nis_error;        /* returned by yp all functions */
 892   char *nis_result;     /* yp_match inits this */
 893   int nis_result_len;  /* and set this */
 894   char *nis_domain;     /* yp_get_default_domain inits this */
 895   char *nis_map = (char *)lp_nis_home_map_name();
 896
 897   if ((nis_error = yp_get_default_domain(&nis_domain)) != 0) {
 898     DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error)));
 899     return last_value;
 900   }
 901
 902   DEBUG(5, ("NIS Domain: %s\n", nis_domain));
 903
 904   if (!strcmp(user_name, last_key)) {
 905         nis_result = last_value;
 906     nis_result_len = strlen(last_value);
 907     nis_error = 0;
 908
 909   } else {
 910
 911     if ((nis_error = yp_match(nis_domain, nis_map,
 912                               user_name, strlen(user_name),
 913                               &nis_result, &nis_result_len)) == 0) {
 914        if (!nis_error && nis_result_len >= sizeof(pstring)) {
 915                nis_result_len = sizeof(pstring)-1;
 916        }
 917        fstrcpy(last_key, user_name);
 918        strncpy(last_value, nis_result, nis_result_len);
 919        last_value[nis_result_len] = '\0';
 920         strip_mount_options(&last_value);
 921
 922     } else if(nis_error == YPERR_KEY) {
 923
 924     /* If Key lookup fails user home server is not in nis_map
 925        use default information for server, and home directory */
 926        last_value[0] = 0;
 927        DEBUG(3, ("YP Key not found:  while looking up \"%s\" in map \"%s\"\n",
 928                 user_name, nis_map));
 929        DEBUG(3, ("using defaults for server and home directory\n"));
 930     } else {
 931        DEBUG(3, ("YP Error: \"%s\" while looking up \"%s\" in map \"%s\"\n",
 932                yperr_string(nis_error), user_name, nis_map));
 933     }
 934   }
 935
 936
 937   DEBUG(4, ("YP Lookup: %s resulted in %s\n", user_name, last_value));
 938   return last_value;
 939 }
 940 #endif /* WITH_NISPLUS_HOME */
 941 #endif
 942
 943
 944 /*******************************************************************
 945 are two IPs on the same subnet?
 946 ********************************************************************/
 947 BOOL same_net(struct in_addr ip1,struct in_addr ip2,struct in_addr mask)
 948 {
 949   uint32 net1,net2,nmask;
 950
 951   nmask = ntohl(mask.s_addr);
 952   net1  = ntohl(ip1.s_addr);
 953   net2  = ntohl(ip2.s_addr);
 954
 955   return((net1 & nmask) == (net2 & nmask));
 956 }
 957
 958
 959 /****************************************************************************
 960 check if a process exists. Does this work on all unixes?
 961 ****************************************************************************/
 962
 963 BOOL process_exists(pid_t pid)
 964 {
 965         return(kill(pid,0) == 0 || errno != ESRCH);
 966 }
 967
 968
 969 /*******************************************************************
 970  Convert a uid into a user name.
 971 ********************************************************************/
 972
 973 char *uidtoname(uid_t uid)
 974 {
 975         static fstring name;
 976         struct passwd *pass;
 977
 978         if (winbind_uidtoname(name, uid))
 979                 return name;
 980
 981         pass = sys_getpwuid(uid);
 982         if (pass)
 983                 return(pass->pw_name);
 984         slprintf(name, sizeof(name) - 1, "%d",(int)uid);
 985         return(name);
 986 }
 987
 988
 989 /*******************************************************************
 990  Convert a gid into a group name.
 991 ********************************************************************/
 992
 993 char *gidtoname(gid_t gid)
 994 {
 995         static fstring name;
 996         struct group *grp;
 997
 998         if (winbind_gidtoname(name, gid))
 999                 return name;
1000
1001         grp = getgrgid(gid);
1002         if (grp)
1003                 return(grp->gr_name);
1004         slprintf(name,sizeof(name) - 1, "%d",(int)gid);
1005         return(name);
1006 }
1007
1008 /*******************************************************************
1009  Convert a user name into a uid. If winbindd is present uses this.
1010 ********************************************************************/
1011
1012 uid_t nametouid(char *name)
1013 {
1014         struct passwd *pass;
1015         char *p;
1016         uid_t u;
1017
1018         u = (uid_t)strtol(name, &p, 0);
1019         if ((p != name) && (*p == '\0'))
1020                 return u;
1021
1022         if (winbind_nametouid(&u, name))
1023                 return u;
1024
1025         pass = sys_getpwnam(name);
1026         if (pass)
1027                 return(pass->pw_uid);
1028         return (uid_t)-1;
1029 }
1030
1031 /*******************************************************************
1032  Convert a name to a gid_t if possible. Return -1 if not a group. If winbindd
1033  is present does a shortcut lookup...
1034 ********************************************************************/
1035
1036 gid_t nametogid(char *name)
1037 {
1038         struct group *grp;
1039         char *p;
1040         gid_t g;
1041
1042         g = (gid_t)strtol(name, &p, 0);
1043         if ((p != name) && (*p == '\0'))
1044                 return g;
1045
1046         if (winbind_nametogid(&g, name))
1047                 return g;
1048
1049         grp = getgrnam(name);
1050         if (grp)
1051                 return(grp->gr_gid);
1052         return (gid_t)-1;
1053 }
1054
1055 /*******************************************************************
1056 something really nasty happened - panic!
1057 ********************************************************************/
1058 void smb_panic(char *why)
1059 {
1060         char *cmd = lp_panic_action();
1061         if (cmd && *cmd) {
1062                 system(cmd);
1063         }
1064         DEBUG(0,("PANIC: %s\n", why));
1065         dbgflush();
1066         abort();
1067 }
1068
1069
1070 /*******************************************************************
1071 a readdir wrapper which just returns the file name
1072 ********************************************************************/
1073 char *readdirname(DIR *p)
1074 {
1075         SMB_STRUCT_DIRENT *ptr;
1076         char *dname;
1077
1078         if (!p) return(NULL);
1079
1080         ptr = (SMB_STRUCT_DIRENT *)sys_readdir(p);
1081         if (!ptr) return(NULL);
1082
1083         dname = ptr->d_name;
1084
1085 #ifdef NEXT2
1086         if (telldir(p) < 0) return(NULL);
1087 #endif
1088
1089 #ifdef HAVE_BROKEN_READDIR
1090         /* using /usr/ucb/cc is BAD */
1091         dname = dname - 2;
1092 #endif
1093
1094         {
1095                 static pstring buf;
1096                 int len = NAMLEN(ptr);
1097                 memcpy(buf, dname, len);
1098                 buf[len] = 0;
1099                 dname = buf;
1100         }
1101
1102         return(dname);
1103 }
1104
1105 /*******************************************************************
1106  Utility function used to decide if the last component
1107  of a path matches a (possibly wildcarded) entry in a namelist.
1108 ********************************************************************/
1109
1110 BOOL is_in_path(char *name, name_compare_entry *namelist)
1111 {
1112   pstring last_component;
1113   char *p;
1114
1115   DEBUG(8, ("is_in_path: %s\n", name));
1116
1117   /* if we have no list it's obviously not in the path */
1118   if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL)))
1119   {
1120     DEBUG(8,("is_in_path: no name list.\n"));
1121     return False;
1122   }
1123
1124   /* Get the last component of the unix name. */
1125   p = strrchr(name, '/');
1126   strncpy(last_component, p ? ++p : name, sizeof(last_component)-1);
1127   last_component[sizeof(last_component)-1] = '\0';
1128
1129   for(; namelist->name != NULL; namelist++)
1130   {
1131     if(namelist->is_wild)
1132     {
1133       if (mask_match(last_component, namelist->name, case_sensitive))
1134       {
1135          DEBUG(8,("is_in_path: mask match succeeded\n"));
1136          return True;
1137       }
1138     }
1139     else
1140     {
1141       if((case_sensitive && (strcmp(last_component, namelist->name) == 0))||
1142        (!case_sensitive && (StrCaseCmp(last_component, namelist->name) == 0)))
1143         {
1144          DEBUG(8,("is_in_path: match succeeded\n"));
1145          return True;
1146         }
1147     }
1148   }
1149   DEBUG(8,("is_in_path: match not found\n"));
1150
1151   return False;
1152 }
1153
1154 /*******************************************************************
1155  Strip a '/' separated list into an array of
1156  name_compare_enties structures suitable for
1157  passing to is_in_path(). We do this for
1158  speed so we can pre-parse all the names in the list
1159  and don't do it for each call to is_in_path().
1160  namelist is modified here and is assumed to be
1161  a copy owned by the caller.
1162  We also check if the entry contains a wildcard to
1163  remove a potentially expensive call to mask_match
1164  if possible.
1165 ********************************************************************/
1166
1167 void set_namearray(name_compare_entry **ppname_array, char *namelist)
1168 {
1169   char *name_end;
1170   char *nameptr = namelist;
1171   int num_entries = 0;
1172   int i;
1173
1174   (*ppname_array) = NULL;
1175
1176   if((nameptr == NULL ) || ((nameptr != NULL) && (*nameptr == '\0')))
1177     return;
1178
1179   /* We need to make two passes over the string. The
1180      first to count the number of elements, the second
1181      to split it.
1182    */
1183   while(*nameptr)
1184     {
1185       if ( *nameptr == '/' )
1186         {
1187           /* cope with multiple (useless) /s) */
1188           nameptr++;
1189           continue;
1190         }
1191       /* find the next / */
1192       name_end = strchr(nameptr, '/');
1193
1194       /* oops - the last check for a / didn't find one. */
1195       if (name_end == NULL)
1196         break;
1197
1198       /* next segment please */
1199       nameptr = name_end + 1;
1200       num_entries++;
1201     }
1202
1203   if(num_entries == 0)
1204     return;
1205
1206   if(( (*ppname_array) = (name_compare_entry *)malloc(
1207            (num_entries + 1) * sizeof(name_compare_entry))) == NULL)
1208         {
1209     DEBUG(0,("set_namearray: malloc fail\n"));
1210     return;
1211         }
1212
1213   /* Now copy out the names */
1214   nameptr = namelist;
1215   i = 0;
1216   while(*nameptr)
1217              {
1218       if ( *nameptr == '/' )
1219       {
1220           /* cope with multiple (useless) /s) */
1221           nameptr++;
1222           continue;
1223       }
1224       /* find the next / */
1225       if ((name_end = strchr(nameptr, '/')) != NULL)
1226       {
1227           *name_end = 0;
1228          }
1229
1230       /* oops - the last check for a / didn't find one. */
1231       if(name_end == NULL)
1232         break;
1233
1234       (*ppname_array)[i].is_wild = ms_has_wild(nameptr);
1235       if(((*ppname_array)[i].name = strdup(nameptr)) == NULL)
1236       {
1237         DEBUG(0,("set_namearray: malloc fail (1)\n"));
1238         return;
1239       }
1240
1241       /* next segment please */
1242       nameptr = name_end + 1;
1243       i++;
1244     }
1245
1246   (*ppname_array)[i].name = NULL;
1247
1248   return;
1249 }
1250
1251 /****************************************************************************
1252 routine to free a namearray.
1253 ****************************************************************************/
1254
1255 void free_namearray(name_compare_entry *name_array)
1256 {
1257   if(name_array == NULL)
1258     return;
1259
1260   SAFE_FREE(name_array->name);
1261   SAFE_FREE(name_array);
1262 }
1263
1264 /****************************************************************************
1265  Simple routine to do POSIX file locking. Cruft in NFS and 64->32 bit mapping
1266  is dealt with in posix.c
1267 ****************************************************************************/
1268
1269 BOOL fcntl_lock(int fd, int op, SMB_OFF_T offset, SMB_OFF_T count, int type)
1270 {
1271   SMB_STRUCT_FLOCK lock;
1272   int ret;
1273
1274   DEBUG(8,("fcntl_lock %d %d %.0f %.0f %d\n",fd,op,(double)offset,(double)count,type));
1275
1276   lock.l_type = type;
1277   lock.l_whence = SEEK_SET;
1278   lock.l_start = offset;
1279   lock.l_len = count;
1280   lock.l_pid = 0;
1281
1282   errno = 0;
1283
1284   ret = fcntl(fd,op,&lock);
1285
1286   if (errno != 0)
1287     DEBUG(3,("fcntl_lock: fcntl lock gave errno %d (%s)\n",errno,strerror(errno)));
1288
1289   /* a lock query */
1290   if (op == SMB_F_GETLK)
1291   {
1292     if ((ret != -1) &&
1293         (lock.l_type != F_UNLCK) &&
1294         (lock.l_pid != 0) &&
1295         (lock.l_pid != sys_getpid()))
1296     {
1297       DEBUG(3,("fcntl_lock: fd %d is locked by pid %d\n",fd,(int)lock.l_pid));
1298       return(True);
1299     }
1300
1301     /* it must be not locked or locked by me */
1302     return(False);
1303   }
1304
1305   /* a lock set or unset */
1306   if (ret == -1)
1307   {
1308     DEBUG(3,("fcntl_lock: lock failed at offset %.0f count %.0f op %d type %d (%s)\n",
1309           (double)offset,(double)count,op,type,strerror(errno)));
1310     return(False);
1311   }
1312
1313   /* everything went OK */
1314   DEBUG(8,("fcntl_lock: Lock call successful\n"));
1315
1316   return(True);
1317 }
1318
1319 /*******************************************************************
1320 is the name specified one of my netbios names
1321 returns true is it is equal, false otherwise
1322 ********************************************************************/
1323 BOOL is_myname(char *s)
1324 {
1325   int n;
1326   BOOL ret = False;
1327
1328   for (n=0; my_netbios_names[n]; n++) {
1329     if (strequal(my_netbios_names[n], s))
1330       ret=True;
1331   }
1332   DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret));
1333   return(ret);
1334 }
1335
1336 BOOL is_myname_or_ipaddr(char *s)
1337 {
1338         char *ptr;
1339         pstring nbname;
1340
1341         /* optimize for the common case */
1342         if (strequal(s, global_myname))
1343                 return True;
1344
1345         /* maybe its an IP address? */
1346         if (is_ipaddress(s))
1347         {
1348                 struct iface_struct nics[MAX_INTERFACES];
1349                 int i, n;
1350                 uint32 ip;
1351
1352                 ip = interpret_addr(s);
1353                 if ((ip==0) || (ip==0xffffffff))
1354                         return False;
1355
1356                 n = get_interfaces(nics, MAX_INTERFACES);
1357                 for (i=0; i<n; i++) {
1358                         if (ip == nics[i].ip.s_addr)
1359                                 return True;
1360                 }
1361         }
1362
1363         /* check for an alias */
1364         ptr = lp_netbios_aliases();
1365         while ( next_token(&ptr, nbname, NULL, sizeof(nbname)) )
1366         {
1367                 if (StrCaseCmp(s, nbname) == 0)
1368                         return True;
1369         }
1370
1371
1372         /* no match */
1373         return False;
1374
1375 }
1376
1377
1378 /*******************************************************************
1379 set the horrid remote_arch string based on an enum.
1380 ********************************************************************/
1381 void set_remote_arch(enum remote_arch_types type)
1382 {
1383   extern fstring remote_arch;
1384   ra_type = type;
1385   switch( type )
1386   {
1387   case RA_WFWG:
1388     fstrcpy(remote_arch, "WfWg");
1389     return;
1390   case RA_OS2:
1391     fstrcpy(remote_arch, "OS2");
1392     return;
1393   case RA_WIN95:
1394     fstrcpy(remote_arch, "Win95");
1395     return;
1396   case RA_WINNT:
1397     fstrcpy(remote_arch, "WinNT");
1398     return;
1399   case RA_WIN2K:
1400     fstrcpy(remote_arch, "Win2K");
1401     return;
1402   case RA_SAMBA:
1403     fstrcpy(remote_arch,"Samba");
1404     return;
1405   default:
1406     ra_type = RA_UNKNOWN;
1407     fstrcpy(remote_arch, "UNKNOWN");
1408     break;
1409   }
1410 }
1411
1412 /*******************************************************************
1413  Get the remote_arch type.
1414 ********************************************************************/
1415 enum remote_arch_types get_remote_arch(void)
1416 {
1417   return ra_type;
1418 }
1419
1420
1421 void out_ascii(FILE *f, unsigned char *buf,int len)
1422 {
1423         int i;
1424         for (i=0;i<len;i++)
1425         {
1426                 fprintf(f, "%c", isprint(buf[i])?buf[i]:'.');
1427         }
1428 }
1429
1430 void out_data(FILE *f,char *buf1,int len, int per_line)
1431 {
1432         unsigned char *buf = (unsigned char *)buf1;
1433         int i=0;
1434         if (len<=0)
1435         {
1436                 return;
1437         }
1438
1439         fprintf(f, "[%03X] ",i);
1440         for (i=0;i<len;)
1441         {
1442                 fprintf(f, "%02X ",(int)buf[i]);
1443                 i++;
1444                 if (i%(per_line/2) == 0) fprintf(f, " ");
1445                 if (i%per_line == 0)
1446                 {
1447                         out_ascii(f,&buf[i-per_line  ],per_line/2); fprintf(f, " ");
1448                         out_ascii(f,&buf[i-per_line/2],per_line/2); fprintf(f, "\n");
1449                         if (i<len) fprintf(f, "[%03X] ",i);
1450                 }
1451         }
1452         if ((i%per_line) != 0)
1453         {
1454                 int n;
1455
1456                 n = per_line - (i%per_line);
1457                 fprintf(f, " ");
1458                 if (n>(per_line/2)) fprintf(f, " ");
1459                 while (n--)
1460                 {
1461                         fprintf(f, "   ");
1462                 }
1463                 n = MIN(per_line/2,i%per_line);
1464                 out_ascii(f,&buf[i-(i%per_line)],n); fprintf(f, " ");
1465                 n = (i%per_line) - n;
1466                 if (n>0) out_ascii(f,&buf[i-n],n);
1467                 fprintf(f, "\n");
1468         }
1469 }
1470
1471 void print_asc(int level, unsigned char *buf,int len)
1472 {
1473         int i;
1474         for (i=0;i<len;i++)
1475                 DEBUG(level,("%c", isprint(buf[i])?buf[i]:'.'));
1476 }
1477
1478 void dump_data(int level,char *buf1,int len)
1479 {
1480   unsigned char *buf = (unsigned char *)buf1;
1481   int i=0;
1482   if (len<=0) return;
1483
1484   DEBUG(level,("[%03X] ",i));
1485   for (i=0;i<len;) {
1486     DEBUG(level,("%02X ",(int)buf[i]));
1487     i++;
1488     if (i%8 == 0) DEBUG(level,(" "));
1489     if (i%16 == 0) {
1490       print_asc(level,&buf[i-16],8); DEBUG(level,(" "));
1491       print_asc(level,&buf[i-8],8); DEBUG(level,("\n"));
1492       if (i<len) DEBUG(level,("[%03X] ",i));
1493     }
1494   }
1495   if (i%16) {
1496     int n;
1497
1498     n = 16 - (i%16);
1499     DEBUG(level,(" "));
1500     if (n>8) DEBUG(level,(" "));
1501     while (n--) DEBUG(level,("   "));
1502
1503     n = MIN(8,i%16);
1504     print_asc(level,&buf[i-(i%16)],n); DEBUG(level,(" "));
1505     n = (i%16) - n;
1506     if (n>0) print_asc(level,&buf[i-n],n);
1507     DEBUG(level,("\n"));
1508   }
1509 }
1510
1511 char *tab_depth(int depth)
1512 {
1513         static pstring spaces;
1514         memset(spaces, ' ', depth * 4);
1515         spaces[depth * 4] = 0;
1516         return spaces;
1517 }
1518
1519 /*****************************************************************************
1520  * Provide a checksum on a string
1521  *
1522  *  Input:  s - the null-terminated character string for which the checksum
1523  *              will be calculated.
1524  *
1525  *  Output: The checksum value calculated for s.
1526  *
1527  * ****************************************************************************
1528  */
1529 int str_checksum(const char *s)
1530 {
1531         int res = 0;
1532         int c;
1533         int i=0;
1534
1535         while(*s) {
1536                 c = *s;
1537                 res ^= (c << (i % 15)) ^ (c >> (15-(i%15)));
1538                 s++;
1539                 i++;
1540         }
1541         return(res);
1542 } /* str_checksum */
1543
1544
1545
1546 /*****************************************************************
1547 zero a memory area then free it. Used to catch bugs faster
1548 *****************************************************************/
1549 void zero_free(void *p, size_t size)
1550 {
1551         memset(p, 0, size);
1552         SAFE_FREE(p);
1553 }
1554
1555
1556 /*****************************************************************
1557 set our open file limit to a requested max and return the limit
1558 *****************************************************************/
1559 int set_maxfiles(int requested_max)
1560 {
1561 #if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE))
1562         struct rlimit rlp;
1563         int saved_current_limit;
1564
1565         if(getrlimit(RLIMIT_NOFILE, &rlp)) {
1566                 DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n",
1567                         strerror(errno) ));
1568                 /* just guess... */
1569                 return requested_max;
1570         }
1571
1572         /*
1573      * Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to
1574          * account for the extra fd we need
1575          * as well as the log files and standard
1576          * handles etc. Save the limit we want to set in case
1577          * we are running on an OS that doesn't support this limit (AIX)
1578          * which always returns RLIM_INFINITY for rlp.rlim_max.
1579          */
1580
1581         /* Try raising the hard (max) limit to the requested amount. */
1582
1583 #if defined(RLIM_INFINITY)
1584         if (rlp.rlim_max != RLIM_INFINITY) {
1585                 int orig_max = rlp.rlim_max;
1586
1587                 if ( rlp.rlim_max < requested_max )
1588                         rlp.rlim_max = requested_max;
1589
1590                 /* This failing is not an error - many systems (Linux) don't
1591                         support our default request of 10,000 open files. JRA. */
1592
1593                 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
1594                         DEBUG(3,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d max files failed with error %s\n",
1595                                 (int)rlp.rlim_max, strerror(errno) ));
1596
1597                         /* Set failed - restore original value from get. */
1598                         rlp.rlim_max = orig_max;
1599                 }
1600         }
1601 #endif
1602
1603         /* Now try setting the soft (current) limit. */
1604
1605         saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);
1606
1607         if(setrlimit(RLIMIT_NOFILE, &rlp)) {
1608                 DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n",
1609                         (int)rlp.rlim_cur, strerror(errno) ));
1610                 /* just guess... */
1611                 return saved_current_limit;
1612         }
1613
1614         if(getrlimit(RLIMIT_NOFILE, &rlp)) {
1615                 DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n",
1616                         strerror(errno) ));
1617                 /* just guess... */
1618                 return saved_current_limit;
1619     }
1620
1621 #if defined(RLIM_INFINITY)
1622         if(rlp.rlim_cur == RLIM_INFINITY)
1623                 return saved_current_limit;
1624 #endif
1625
1626     if((int)rlp.rlim_cur > saved_current_limit)
1627                 return saved_current_limit;
1628
1629         return rlp.rlim_cur;
1630 #else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */
1631         /*
1632          * No way to know - just guess...
1633          */
1634         return requested_max;
1635 #endif
1636 }
1637
1638 /*****************************************************************
1639  splits out the start of the key (HKLM or HKU) and the rest of the key
1640  *****************************************************************/
1641 BOOL reg_split_key(char *full_keyname, uint32 *reg_type, char *key_name)
1642 {
1643         pstring tmp;
1644
1645         if (!next_token(&full_keyname, tmp, "\\", sizeof(tmp)))
1646         {
1647                 return False;
1648         }
1649
1650         (*reg_type) = 0;
1651
1652         DEBUG(10, ("reg_split_key: hive %s\n", tmp));
1653
1654         if (strequal(tmp, "HKLM") || strequal(tmp, "HKEY_LOCAL_MACHINE"))
1655         {
1656                 (*reg_type) = HKEY_LOCAL_MACHINE;
1657         }
1658         else if (strequal(tmp, "HKU") || strequal(tmp, "HKEY_USERS"))
1659         {
1660                 (*reg_type) = HKEY_USERS;
1661         }
1662         else
1663         {
1664                 DEBUG(10,("reg_split_key: unrecognised hive key %s\n", tmp));
1665                 return False;
1666         }
1667
1668         if (next_token(NULL, tmp, "\n\r", sizeof(tmp)))
1669         {
1670                 fstrcpy(key_name, tmp);
1671         }
1672         else
1673         {
1674                 key_name[0] = 0;
1675         }
1676
1677         DEBUG(10, ("reg_split_key: name %s\n", key_name));
1678
1679         return True;
1680 }
1681
1682
1683 /*****************************************************************
1684 possibly replace mkstemp if it is broken
1685 *****************************************************************/
1686 int smb_mkstemp(char *template)
1687 {
1688 #if HAVE_SECURE_MKSTEMP
1689         return mkstemp(template);
1690 #else
1691         /* have a reasonable go at emulating it. Hope that
1692            the system mktemp() isn't completly hopeless */
1693         char *p = mktemp(template);
1694         if (!p) return -1;
1695         return open(p, O_CREAT|O_EXCL|O_RDWR, 0600);
1696 #endif
1697 }
1698
1699 /*****************************************************************
1700  malloc that aborts with smb_panic on fail or zero size.
1701  *****************************************************************/
1702
1703 void *smb_xmalloc(size_t size)
1704 {
1705         void *p;
1706         if (size == 0)
1707                 smb_panic("smb_xmalloc: called with zero size.\n");
1708         if ((p = malloc(size)) == NULL)
1709                 smb_panic("smb_xmalloc: malloc fail.\n");
1710         return p;
1711 }
1712
1713 /*****************************************************************
1714  Memdup with smb_panic on fail.
1715  *****************************************************************/
1716
1717 void *xmemdup(const void *p, size_t size)
1718 {
1719         void *p2;
1720         p2 = smb_xmalloc(size);
1721         memcpy(p2, p, size);
1722         return p2;
1723 }
1724
1725 /*****************************************************************
1726  strdup that aborts on malloc fail.
1727  *****************************************************************/
1728
1729 char *xstrdup(const char *s)
1730 {
1731         char *s1 = strdup(s);
1732         if (!s1)
1733                 smb_panic("xstrdup: malloc fail\n");
1734         return s1;
1735 }
1736
1737 /*****************************************************************
1738 like strdup but for memory
1739  *****************************************************************/
1740 void *memdup(void *p, size_t size)
1741 {
1742         void *p2;
1743         if (size == 0) return NULL;
1744         p2 = malloc(size);
1745         if (!p2) return NULL;
1746         memcpy(p2, p, size);
1747         return p2;
1748 }
1749
1750 /*****************************************************************
1751 get local hostname and cache result
1752  *****************************************************************/
1753 char *myhostname(void)
1754 {
1755         static pstring ret;
1756         if (ret[0] == 0) {
1757                 get_myname(ret);
1758         }
1759         return ret;
1760 }
1761
1762
1763 /*****************************************************************
1764 a useful function for returning a path in the Samba lock directory
1765  *****************************************************************/
1766 char *lock_path(char *name)
1767 {
1768         static pstring fname;
1769
1770         pstrcpy(fname,lp_lockdir());
1771         trim_string(fname,"","/");
1772
1773         if (!directory_exist(fname,NULL)) {
1774                 mkdir(fname,0755);
1775         }
1776
1777         pstrcat(fname,"/");
1778         pstrcat(fname,name);
1779
1780         return fname;
1781 }
1782
1783 /*******************************************************************
1784  Given a filename - get its directory name
1785  NB: Returned in static storage.  Caveats:
1786  o  Not safe in thread environment.
1787  o  Caller must not free.
1788  o  If caller wishes to preserve, they should copy.
1789 ********************************************************************/
1790
1791 char *parent_dirname(const char *path)
1792 {
1793         static pstring dirpath;
1794         char *p;
1795
1796         if (!path)
1797                 return(NULL);
1798
1799         pstrcpy(dirpath, path);
1800         p = strrchr(dirpath, '/');  /* Find final '/', if any */
1801         if (!p) {
1802                 pstrcpy(dirpath, ".");    /* No final "/", so dir is "." */
1803         } else {
1804                 if (p == dirpath)
1805                         ++p;    /* For root "/", leave "/" in place */
1806                 *p = '\0';
1807         }
1808         return dirpath;
1809 }
1810
1811
1812 /*******************************************************************
1813 determine if a pattern contains any Microsoft wildcard characters
1814  *******************************************************************/
1815 BOOL ms_has_wild(char *s)
1816 {
1817         char c;
1818         while ((c = *s++)) {
1819                 switch (c) {
1820                 case '*':
1821                 case '?':
1822                 case '<':
1823                 case '>':
1824                 case '"':
1825                         return True;
1826                 }
1827         }
1828         return False;
1829 }
1830
1831 /*******************************************************************
1832  a wrapper that handles case sensitivity and the special handling
1833    of the ".." name
1834  *******************************************************************/
1835 BOOL mask_match(char *string, char *pattern, BOOL is_case_sensitive)
1836 {
1837         fstring p2, s2;
1838         if (strcmp(string,"..") == 0) string = ".";
1839         if (strcmp(pattern,".") == 0) return False;
1840
1841         if (is_case_sensitive) {
1842                 return ms_fnmatch(pattern, string) == 0;
1843         }
1844
1845         fstrcpy(p2, pattern);
1846         fstrcpy(s2, string);
1847         strlower(p2);
1848         strlower(s2);
1849         return ms_fnmatch(p2, s2) == 0;
1850 }
1851
1852 /*********************************************************
1853  Recursive routine that is called by unix_wild_match.
1854 *********************************************************/
1855
1856 static BOOL unix_do_match(char *regexp, char *str)
1857 {
1858         char *p;
1859
1860         for( p = regexp; *p && *str; ) {
1861
1862                 switch(*p) {
1863                         case '?':
1864                                 str++;
1865                                 p++;
1866                                 break;
1867
1868                         case '*':
1869
1870                                 /*
1871                                  * Look for a character matching
1872                                  * the one after the '*'.
1873                                  */
1874                                 p++;
1875                                 if(!*p)
1876                                         return True; /* Automatic match */
1877                                 while(*str) {
1878
1879                                         while(*str && (*p != *str))
1880                                                 str++;
1881
1882                                         /*
1883                                          * Patch from weidel@multichart.de. In the case of the regexp
1884                                          * '*XX*' we want to ensure there are at least 2 'X' characters
1885                                          * in the string after the '*' for a match to be made.
1886                                          */
1887
1888                                         {
1889                                                 int matchcount=0;
1890
1891                                                 /*
1892                                                  * Eat all the characters that match, but count how many there were.
1893                                                  */
1894
1895                                                 while(*str && (*p == *str)) {
1896                                                         str++;
1897                                                         matchcount++;
1898                                                 }
1899
1900                                                 /*
1901                                                  * Now check that if the regexp had n identical characters that
1902                                                  * matchcount had at least that many matches.
1903                                                  */
1904
1905                                                 while ( *(p+1) && (*(p+1) == *p)) {
1906                                                         p++;
1907                                                         matchcount--;
1908                                                 }
1909
1910                                                 if ( matchcount <= 0 )
1911                                                         return False;
1912                                         }
1913
1914                                         str--; /* We've eaten the match char after the '*' */
1915
1916                                         if(unix_do_match(p, str))
1917                                                 return True;
1918
1919                                         if(!*str)
1920                                                 return False;
1921                                         else
1922                                                 str++;
1923                                 }
1924                                 return False;
1925
1926                         default:
1927                                 if(*str != *p)
1928                                         return False;
1929                                 str++;
1930                                 p++;
1931                                 break;
1932                 }
1933         }
1934
1935         if(!*p && !*str)
1936                 return True;
1937
1938         if (!*p && str[0] == '.' && str[1] == 0)
1939                 return(True);
1940
1941         if (!*str && *p == '?') {
1942                 while (*p == '?')
1943                         p++;
1944                 return(!*p);
1945         }
1946
1947         if(!*str && (*p == '*' && p[1] == '\0'))
1948                 return True;
1949
1950         return False;
1951 }
1952
1953 /*******************************************************************
1954  Simple case insensitive interface to a UNIX wildcard matcher.
1955 *******************************************************************/
1956
1957 BOOL unix_wild_match(char *pattern, char *string)
1958 {
1959         pstring p2, s2;
1960         char *p;
1961
1962         pstrcpy(p2, pattern);
1963         pstrcpy(s2, string);
1964         strlower(p2);
1965         strlower(s2);
1966
1967         /* Remove any *? and ** from the pattern as they are meaningless */
1968         for(p = p2; *p; p++)
1969                 while( *p == '*' && (p[1] == '?' ||p[1] == '*'))
1970                         pstrcpy( &p[1], &p[2]);
1971
1972         if (strequal(p2,"*"))
1973                 return True;
1974
1975         return unix_do_match(p2, s2) == 0;
1976 }
1977
1978 #ifdef __INSURE__
1979
1980 /*******************************************************************
1981 This routine is a trick to immediately catch errors when debugging
1982 with insure. A xterm with a gdb is popped up when insure catches
1983 a error. It is Linux specific.
1984 ********************************************************************/
1985 int _Insure_trap_error(int a1, int a2, int a3, int a4, int a5, int a6)
1986 {
1987         static int (*fn)();
1988         int ret;
1989         char pidstr[10];
1990         pstring cmd = "/usr/X11R6/bin/xterm -display :0 -T Panic -n Panic -e /bin/sh -c 'cat /tmp/ierrs.*.%d ; gdb /proc/%d/exe %d'";
1991
1992         slprintf(pidstr, sizeof(pidstr)-1, "%d", sys_getpid());
1993         pstring_sub(cmd, "%d", pidstr);
1994
1995         if (!fn) {
1996                 static void *h;
1997                 h = dlopen("/usr/local/parasoft/insure++lite/lib.linux2/libinsure.so", RTLD_LAZY);
1998                 fn = dlsym(h, "_Insure_trap_error");
1999         }
2000
2001         ret = fn(a1, a2, a3, a4, a5, a6);
2002
2003         system(cmd);
2004
2005         return ret;
2006 }
2007 #endif