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
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "includes.h"
  23
  24 #if (defined(HAVE_NETGROUP) && defined (WITH_AUTOMOUNT))
  25 #ifdef WITH_NISPLUS_HOME
  26 #ifdef BROKEN_NISPLUS_INCLUDE_FILES
  27 /*
  28  * The following lines are needed due to buggy include files
  29  * in Solaris 2.6 which define GROUP in both /usr/include/sys/acl.h and
  30  * also in /usr/include/rpcsvc/nis.h. The definitions conflict. JRA.
  31  * Also GROUP_OBJ is defined as 0x4 in /usr/include/sys/acl.h and as
  32  * an enum in /usr/include/rpcsvc/nis.h.
  33  */
  34
  35 #if defined(GROUP)
  36 #undef GROUP
  37 #endif
  38
  39 #if defined(GROUP_OBJ)
  40 #undef GROUP_OBJ
  41 #endif
  42
  43 #endif /* BROKEN_NISPLUS_INCLUDE_FILES */
  44
  45 #include <rpcsvc/nis.h>
  46
  47 #else /* !WITH_NISPLUS_HOME */
  48
  49 #include "rpcsvc/ypclnt.h"
  50
  51 #endif /* WITH_NISPLUS_HOME */
  52 #endif /* HAVE_NETGROUP && WITH_AUTOMOUNT */
  53
  54 #ifdef WITH_SSL
  55 #include <ssl.h>
  56 #undef Realloc  /* SSLeay defines this and samba has a function of this name */
  57 extern SSL  *ssl;
  58 extern int  sslFd;
  59 #endif  /* WITH_SSL */
  60
  61 extern int DEBUGLEVEL;
  62
  63 int Protocol = PROTOCOL_COREPLUS;
  64
  65 /* a default finfo structure to ensure all fields are sensible */
  66 file_info def_finfo = {-1,0,0,0,0,0,0,"",""};
  67
  68 /* this is used by the chaining code */
  69 int chain_size = 0;
  70
  71 int trans_num = 0;
  72
  73 /*
  74    case handling on filenames
  75 */
  76 int case_default = CASE_LOWER;
  77
  78 /* the following control case operations - they are put here so the
  79    client can link easily */
  80 BOOL case_sensitive;
  81 BOOL case_preserve;
  82 BOOL use_mangled_map = False;
  83 BOOL short_case_preserve;
  84 BOOL case_mangle;
  85
  86 static enum remote_arch_types ra_type = RA_UNKNOWN;
  87 pstring user_socket_options=DEFAULT_SOCKET_OPTIONS;
  88
  89 pstring global_myname = "";
  90 fstring global_myworkgroup = "";
  91 char **my_netbios_names;
  92
  93
  94 /****************************************************************************
  95   find a suitable temporary directory. The result should be copied immediately
  96   as it may be overwritten by a subsequent call
  97   ****************************************************************************/
  98 char *tmpdir(void)
  99 {
 100   char *p;
 101   if ((p = getenv("TMPDIR"))) {
 102     return p;
 103   }
 104   return "/tmp";
 105 }
 106
 107 /****************************************************************************
 108 determine whether we are in the specified group
 109 ****************************************************************************/
 110
 111 BOOL in_group(gid_t group, gid_t current_gid, int ngroups, gid_t *groups)
 112 {
 113         int i;
 114
 115         if (group == current_gid) return(True);
 116
 117         for (i=0;i<ngroups;i++)
 118                 if (group == groups[i])
 119                         return(True);
 120
 121         return(False);
 122 }
 123
 124
 125 /****************************************************************************
 126 like atoi but gets the value up to the separater character
 127 ****************************************************************************/
 128 char *Atoic(char *p, int *n, char *c)
 129 {
 130         if (!isdigit((int)*p))
 131         {
 132                 DEBUG(5, ("Atoic: malformed number\n"));
 133                 return NULL;
 134         }
 135
 136         (*n) = atoi(p);
 137
 138         while ((*p) && isdigit((int)*p))
 139         {
 140                 p++;
 141         }
 142
 143         if (strchr(c, *p) == NULL)
 144         {
 145                 DEBUG(5, ("Atoic: no separator characters (%s) not found\n", c));
 146                 return NULL;
 147         }
 148
 149         return p;
 150 }
 151
 152 /*************************************************************************
 153  reads a list of numbers
 154  *************************************************************************/
 155 char *get_numlist(char *p, uint32 **num, int *count)
 156 {
 157         int val;
 158
 159         if (num == NULL || count == NULL)
 160                 return NULL;
 161
 162         (*count) = 0;
 163         (*num  ) = NULL;
 164
 165         while ((p = Atoic(p, &val, ":,")) != NULL && (*p) != ':') {
 166                 uint32 *tn;
 167
 168                 tn = Realloc((*num), ((*count)+1) * sizeof(uint32));
 169                 if (tn == NULL) {
 170                         if (*num)
 171                                 free(*num);
 172                         return NULL;
 173                 } else
 174                         (*num) = tn;
 175                 (*num)[(*count)] = val;
 176                 (*count)++;
 177                 p++;
 178         }
 179
 180         return p;
 181 }
 182
 183
 184 /*******************************************************************
 185   check if a file exists - call vfs_file_exist for samba files
 186 ********************************************************************/
 187 BOOL file_exist(char *fname,SMB_STRUCT_STAT *sbuf)
 188 {
 189   SMB_STRUCT_STAT st;
 190   if (!sbuf) sbuf = &st;
 191
 192   if (sys_stat(fname,sbuf) != 0)
 193     return(False);
 194
 195   return(S_ISREG(sbuf->st_mode));
 196 }
 197
 198 /*******************************************************************
 199   rename a unix file
 200 ********************************************************************/
 201 int file_rename(char *from, char *to)
 202 {
 203         int rcode = rename (from, to);
 204
 205         if (errno == EXDEV)
 206         {
 207                 /* Rename across filesystems needed. */
 208                 rcode = copy_reg (from, to);
 209         }
 210         return rcode;
 211 }
 212
 213 /*******************************************************************
 214 check a files mod time
 215 ********************************************************************/
 216 time_t file_modtime(char *fname)
 217 {
 218   SMB_STRUCT_STAT st;
 219
 220   if (sys_stat(fname,&st) != 0)
 221     return(0);
 222
 223   return(st.st_mtime);
 224 }
 225
 226 /*******************************************************************
 227   check if a directory exists
 228 ********************************************************************/
 229 BOOL directory_exist(char *dname,SMB_STRUCT_STAT *st)
 230 {
 231   SMB_STRUCT_STAT st2;
 232   BOOL ret;
 233
 234   if (!st) st = &st2;
 235
 236   if (sys_stat(dname,st) != 0)
 237     return(False);
 238
 239   ret = S_ISDIR(st->st_mode);
 240   if(!ret)
 241     errno = ENOTDIR;
 242   return ret;
 243 }
 244
 245 /*******************************************************************
 246 returns the size in bytes of the named file
 247 ********************************************************************/
 248 SMB_OFF_T get_file_size(char *file_name)
 249 {
 250   SMB_STRUCT_STAT buf;
 251   buf.st_size = 0;
 252   if(sys_stat(file_name,&buf) != 0)
 253     return (SMB_OFF_T)-1;
 254   return(buf.st_size);
 255 }
 256
 257 /*******************************************************************
 258 return a string representing an attribute for a file
 259 ********************************************************************/
 260 char *attrib_string(uint16 mode)
 261 {
 262   static fstring attrstr;
 263
 264   attrstr[0] = 0;
 265
 266   if (mode & aVOLID) fstrcat(attrstr,"V");
 267   if (mode & aDIR) fstrcat(attrstr,"D");
 268   if (mode & aARCH) fstrcat(attrstr,"A");
 269   if (mode & aHIDDEN) fstrcat(attrstr,"H");
 270   if (mode & aSYSTEM) fstrcat(attrstr,"S");
 271   if (mode & aRONLY) fstrcat(attrstr,"R");
 272
 273   return(attrstr);
 274 }
 275
 276 /*******************************************************************
 277   show a smb message structure
 278 ********************************************************************/
 279 void show_msg(char *buf)
 280 {
 281         int i;
 282         int bcc=0;
 283
 284         if (DEBUGLEVEL < 5) return;
 285
 286         DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n",
 287                         smb_len(buf),
 288                         (int)CVAL(buf,smb_com),
 289                         (int)CVAL(buf,smb_rcls),
 290                         (int)CVAL(buf,smb_reh),
 291                         (int)SVAL(buf,smb_err),
 292                         (int)CVAL(buf,smb_flg),
 293                         (int)SVAL(buf,smb_flg2)));
 294         DEBUG(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\nsmt_wct=%d\n",
 295                         (int)SVAL(buf,smb_tid),
 296                         (int)SVAL(buf,smb_pid),
 297                         (int)SVAL(buf,smb_uid),
 298                         (int)SVAL(buf,smb_mid),
 299                         (int)CVAL(buf,smb_wct)));
 300
 301         for (i=0;i<(int)CVAL(buf,smb_wct);i++)
 302         {
 303                 DEBUG(5,("smb_vwv[%d]=%d (0x%X)\n",i,
 304                         SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i)));
 305         }
 306
 307         bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct)));
 308
 309         DEBUG(5,("smb_bcc=%d\n",bcc));
 310
 311         if (DEBUGLEVEL < 10) return;
 312
 313         if (DEBUGLEVEL < 50)
 314         {
 315                 bcc = MIN(bcc, 512);
 316         }
 317
 318         dump_data(10, smb_buf(buf), bcc);
 319 }
 320
 321 /*******************************************************************
 322   set the length and marker of an smb packet
 323 ********************************************************************/
 324 void smb_setlen(char *buf,int len)
 325 {
 326   _smb_setlen(buf,len);
 327
 328   CVAL(buf,4) = 0xFF;
 329   CVAL(buf,5) = 'S';
 330   CVAL(buf,6) = 'M';
 331   CVAL(buf,7) = 'B';
 332 }
 333
 334 /*******************************************************************
 335   setup the word count and byte count for a smb message
 336 ********************************************************************/
 337 int set_message(char *buf,int num_words,int num_bytes,BOOL zero)
 338 {
 339         if (zero)
 340                 memset(buf + smb_size,'\0',num_words*2 + num_bytes);
 341         CVAL(buf,smb_wct) = num_words;
 342         SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
 343         smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
 344         return (smb_size + num_words*2 + num_bytes);
 345 }
 346
 347 /*******************************************************************
 348   setup only the byte count for a smb message
 349 ********************************************************************/
 350 void set_message_bcc(char *buf,int num_bytes)
 351 {
 352         int num_words = CVAL(buf,smb_wct);
 353         SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
 354         smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
 355 }
 356
 357 /*******************************************************************
 358   setup only the byte count for a smb message, using the end of the
 359   message as a marker
 360 ********************************************************************/
 361 void set_message_end(void *outbuf,void *end_ptr)
 362 {
 363         set_message_bcc((char *)outbuf,PTR_DIFF(end_ptr,smb_buf((char *)outbuf)));
 364 }
 365
 366 /*******************************************************************
 367 reduce a file name, removing .. elements.
 368 ********************************************************************/
 369 void dos_clean_name(char *s)
 370 {
 371   char *p=NULL;
 372
 373   DEBUG(3,("dos_clean_name [%s]\n",s));
 374
 375   /* remove any double slashes */
 376   all_string_sub(s, "\\\\", "\\", 0);
 377
 378   while ((p = strstr(s,"\\..\\")) != NULL)
 379     {
 380       pstring s1;
 381
 382       *p = 0;
 383       pstrcpy(s1,p+3);
 384
 385       if ((p=strrchr(s,'\\')) != NULL)
 386         *p = 0;
 387       else
 388         *s = 0;
 389       pstrcat(s,s1);
 390     }
 391
 392   trim_string(s,NULL,"\\..");
 393
 394   all_string_sub(s, "\\.\\", "\\", 0);
 395 }
 396
 397 /*******************************************************************
 398 reduce a file name, removing .. elements.
 399 ********************************************************************/
 400 void unix_clean_name(char *s)
 401 {
 402   char *p=NULL;
 403
 404   DEBUG(3,("unix_clean_name [%s]\n",s));
 405
 406   /* remove any double slashes */
 407   all_string_sub(s, "//","/", 0);
 408
 409   /* Remove leading ./ characters */
 410   if(strncmp(s, "./", 2) == 0) {
 411     trim_string(s, "./", NULL);
 412     if(*s == 0)
 413       pstrcpy(s,"./");
 414   }
 415
 416   while ((p = strstr(s,"/../")) != NULL)
 417     {
 418       pstring s1;
 419
 420       *p = 0;
 421       pstrcpy(s1,p+3);
 422
 423       if ((p=strrchr(s,'/')) != NULL)
 424         *p = 0;
 425       else
 426         *s = 0;
 427       pstrcat(s,s1);
 428     }
 429
 430   trim_string(s,NULL,"/..");
 431 }
 432
 433 /****************************************************************************
 434   make a dir struct
 435 ****************************************************************************/
 436 void make_dir_struct(char *buf,char *mask,char *fname,SMB_OFF_T size,int mode,time_t date)
 437 {
 438   char *p;
 439   pstring mask2;
 440
 441   pstrcpy(mask2,mask);
 442
 443   if ((mode & aDIR) != 0)
 444     size = 0;
 445
 446   memset(buf+1,' ',11);
 447   if ((p = strchr(mask2,'.')) != NULL)
 448     {
 449       *p = 0;
 450       memcpy(buf+1,mask2,MIN(strlen(mask2),8));
 451       memcpy(buf+9,p+1,MIN(strlen(p+1),3));
 452       *p = '.';
 453     }
 454   else
 455     memcpy(buf+1,mask2,MIN(strlen(mask2),11));
 456
 457   memset(buf+21,'\0',DIR_STRUCT_SIZE-21);
 458   CVAL(buf,21) = mode;
 459   put_dos_date(buf,22,date);
 460   SSVAL(buf,26,size & 0xFFFF);
 461   SSVAL(buf,28,(size >> 16)&0xFFFF);
 462   StrnCpy(buf+30,fname,12);
 463   if (!case_sensitive)
 464     strupper(buf+30);
 465   DEBUG(8,("put name [%s] into dir struct\n",buf+30));
 466 }
 467
 468
 469 /*******************************************************************
 470 close the low 3 fd's and open dev/null in their place
 471 ********************************************************************/
 472 void close_low_fds(void)
 473 {
 474   int fd;
 475   int i;
 476   close(0); close(1);
 477 #ifndef __INSURE__
 478   close(2);
 479 #endif
 480   /* try and use up these file descriptors, so silly
 481      library routines writing to stdout etc won't cause havoc */
 482   for (i=0;i<3;i++) {
 483     fd = sys_open("/dev/null",O_RDWR,0);
 484     if (fd < 0) fd = sys_open("/dev/null",O_WRONLY,0);
 485     if (fd < 0) {
 486       DEBUG(0,("Can't open /dev/null\n"));
 487       return;
 488     }
 489     if (fd != i) {
 490       DEBUG(0,("Didn't get file descriptor %d\n",i));
 491       return;
 492     }
 493   }
 494 }
 495
 496 /****************************************************************************
 497 Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
 498 else
 499 if SYSV use O_NDELAY
 500 if BSD use FNDELAY
 501 ****************************************************************************/
 502 int set_blocking(int fd, BOOL set)
 503 {
 504   int val;
 505 #ifdef O_NONBLOCK
 506 #define FLAG_TO_SET O_NONBLOCK
 507 #else
 508 #ifdef SYSV
 509 #define FLAG_TO_SET O_NDELAY
 510 #else /* BSD */
 511 #define FLAG_TO_SET FNDELAY
 512 #endif
 513 #endif
 514
 515   if((val = fcntl(fd, F_GETFL, 0)) == -1)
 516         return -1;
 517   if(set) /* Turn blocking on - ie. clear nonblock flag */
 518         val &= ~FLAG_TO_SET;
 519   else
 520     val |= FLAG_TO_SET;
 521   return fcntl( fd, F_SETFL, val);
 522 #undef FLAG_TO_SET
 523 }
 524
 525 /****************************************************************************
 526 transfer some data between two fd's
 527 ****************************************************************************/
 528 SMB_OFF_T transfer_file(int infd,int outfd,SMB_OFF_T n,char *header,int headlen,int align)
 529 {
 530   static char *buf=NULL;
 531   static int size=0;
 532   char *buf1,*abuf;
 533   SMB_OFF_T total = 0;
 534
 535   DEBUG(4,("transfer_file n=%.0f  (head=%d) called\n",(double)n,headlen));
 536
 537   if (size == 0) {
 538     size = lp_readsize();
 539     size = MAX(size,1024);
 540   }
 541
 542   while (!buf && size>0) {
 543     buf = (char *)malloc(size+8);
 544     if (!buf) size /= 2;
 545   }
 546
 547   if (!buf) {
 548     DEBUG(0,("Can't allocate transfer buffer!\n"));
 549     exit(1);
 550   }
 551
 552   abuf = buf + (align%8);
 553
 554   if (header)
 555     n += headlen;
 556
 557   while (n > 0)
 558   {
 559     int s = (int)MIN(n,(SMB_OFF_T)size);
 560     int ret,ret2=0;
 561
 562     ret = 0;
 563
 564     if (header && (headlen >= MIN(s,1024))) {
 565       buf1 = header;
 566       s = headlen;
 567       ret = headlen;
 568       headlen = 0;
 569       header = NULL;
 570     } else {
 571       buf1 = abuf;
 572     }
 573
 574     if (header && headlen > 0)
 575     {
 576       ret = MIN(headlen,size);
 577       memcpy(buf1,header,ret);
 578       headlen -= ret;
 579       header += ret;
 580       if (headlen <= 0) header = NULL;
 581     }
 582
 583     if (s > ret)
 584       ret += read(infd,buf1+ret,s-ret);
 585
 586     if (ret > 0)
 587     {
 588       ret2 = (outfd>=0?write_data(outfd,buf1,ret):ret);
 589       if (ret2 > 0) total += ret2;
 590       /* if we can't write then dump excess data */
 591       if (ret2 != ret)
 592         transfer_file(infd,-1,n-(ret+headlen),NULL,0,0);
 593     }
 594     if (ret <= 0 || ret2 != ret)
 595       return(total);
 596     n -= ret;
 597   }
 598   return(total);
 599 }
 600
 601
 602 /*******************************************************************
 603 sleep for a specified number of milliseconds
 604 ********************************************************************/
 605 void msleep(int t)
 606 {
 607   int tdiff=0;
 608   struct timeval tval,t1,t2;
 609   fd_set fds;
 610
 611   GetTimeOfDay(&t1);
 612   GetTimeOfDay(&t2);
 613
 614   while (tdiff < t) {
 615     tval.tv_sec = (t-tdiff)/1000;
 616     tval.tv_usec = 1000*((t-tdiff)%1000);
 617
 618     FD_ZERO(&fds);
 619     errno = 0;
 620     sys_select_intr(0,&fds,&tval);
 621
 622     GetTimeOfDay(&t2);
 623     tdiff = TvalDiff(&t1,&t2);
 624   }
 625 }
 626
 627
 628 /****************************************************************************
 629 become a daemon, discarding the controlling terminal
 630 ****************************************************************************/
 631 void become_daemon(void)
 632 {
 633         if (sys_fork()) {
 634                 _exit(0);
 635         }
 636
 637   /* detach from the terminal */
 638 #ifdef HAVE_SETSID
 639         setsid();
 640 #elif defined(TIOCNOTTY)
 641         {
 642                 int i = sys_open("/dev/tty", O_RDWR, 0);
 643                 if (i != -1) {
 644                         ioctl(i, (int) TIOCNOTTY, (char *)0);
 645                         close(i);
 646                 }
 647         }
 648 #endif /* HAVE_SETSID */
 649
 650         /* Close fd's 0,1,2. Needed if started by rsh */
 651         close_low_fds();
 652 }
 653
 654
 655 /****************************************************************************
 656 put up a yes/no prompt
 657 ****************************************************************************/
 658 BOOL yesno(char *p)
 659 {
 660   pstring ans;
 661   printf("%s",p);
 662
 663   if (!fgets(ans,sizeof(ans)-1,stdin))
 664     return(False);
 665
 666   if (*ans == 'y' || *ans == 'Y')
 667     return(True);
 668
 669   return(False);
 670 }
 671
 672 #ifdef HPUX
 673 /****************************************************************************
 674 this is a version of setbuffer() for those machines that only have setvbuf
 675 ****************************************************************************/
 676  void setbuffer(FILE *f,char *buf,int bufsize)
 677 {
 678   setvbuf(f,buf,_IOFBF,bufsize);
 679 }
 680 #endif
 681
 682 /****************************************************************************
 683 expand a pointer to be a particular size
 684 ****************************************************************************/
 685 void *Realloc(void *p,size_t size)
 686 {
 687   void *ret=NULL;
 688
 689   if (size == 0) {
 690     if (p) free(p);
 691     DEBUG(5,("Realloc asked for 0 bytes\n"));
 692     return NULL;
 693   }
 694
 695   if (!p)
 696     ret = (void *)malloc(size);
 697   else
 698     ret = (void *)realloc(p,size);
 699
 700   if (!ret)
 701     DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",(int)size));
 702
 703   return(ret);
 704 }
 705
 706
 707 /****************************************************************************
 708 free memory, checks for NULL
 709 ****************************************************************************/
 710 void safe_free(void *p)
 711 {
 712         if (p != NULL)
 713         {
 714                 free(p);
 715         }
 716 }
 717
 718
 719 /****************************************************************************
 720 get my own name and IP
 721 ****************************************************************************/
 722 BOOL get_myname(char *my_name)
 723 {
 724         pstring hostname;
 725
 726         *hostname = 0;
 727
 728         /* get my host name */
 729         if (gethostname(hostname, sizeof(hostname)) == -1) {
 730                 DEBUG(0,("gethostname failed\n"));
 731                 return False;
 732         }
 733
 734         /* Ensure null termination. */
 735         hostname[sizeof(hostname)-1] = '\0';
 736
 737         if (my_name) {
 738                 /* split off any parts after an initial . */
 739                 char *p = strchr(hostname,'.');
 740                 if (p) *p = 0;
 741
 742                 fstrcpy(my_name,hostname);
 743         }
 744
 745         return(True);
 746 }
 747
 748 /****************************************************************************
 749 interpret a protocol description string, with a default
 750 ****************************************************************************/
 751 int interpret_protocol(char *str,int def)
 752 {
 753   if (strequal(str,"NT1"))
 754     return(PROTOCOL_NT1);
 755   if (strequal(str,"LANMAN2"))
 756     return(PROTOCOL_LANMAN2);
 757   if (strequal(str,"LANMAN1"))
 758     return(PROTOCOL_LANMAN1);
 759   if (strequal(str,"CORE"))
 760     return(PROTOCOL_CORE);
 761   if (strequal(str,"COREPLUS"))
 762     return(PROTOCOL_COREPLUS);
 763   if (strequal(str,"CORE+"))
 764     return(PROTOCOL_COREPLUS);
 765
 766   DEBUG(0,("Unrecognised protocol level %s\n",str));
 767
 768   return(def);
 769 }
 770
 771 /****************************************************************************
 772  Return true if a string could be a pure IP address.
 773 ****************************************************************************/
 774
 775 BOOL is_ipaddress(const char *str)
 776 {
 777   BOOL pure_address = True;
 778   int i;
 779
 780   for (i=0; pure_address && str[i]; i++)
 781     if (!(isdigit((int)str[i]) || str[i] == '.'))
 782       pure_address = False;
 783
 784   /* Check that a pure number is not misinterpreted as an IP */
 785   pure_address = pure_address && (strchr(str, '.') != NULL);
 786
 787   return pure_address;
 788 }
 789
 790 /****************************************************************************
 791 interpret an internet address or name into an IP address in 4 byte form
 792 ****************************************************************************/
 793
 794 uint32 interpret_addr(char *str)
 795 {
 796   struct hostent *hp;
 797   uint32 res;
 798
 799   if (strcmp(str,"0.0.0.0") == 0) return(0);
 800   if (strcmp(str,"255.255.255.255") == 0) return(0xFFFFFFFF);
 801
 802   /* if it's in the form of an IP address then get the lib to interpret it */
 803   if (is_ipaddress(str)) {
 804     res = inet_addr(str);
 805   } else {
 806     /* otherwise assume it's a network name of some sort and use
 807        sys_gethostbyname */
 808     if ((hp = sys_gethostbyname(str)) == 0) {
 809       DEBUG(3,("sys_gethostbyname: Unknown host. %s\n",str));
 810       return 0;
 811     }
 812     if(hp->h_addr == NULL) {
 813       DEBUG(3,("sys_gethostbyname: host address is invalid for host %s\n",str));
 814       return 0;
 815     }
 816     putip((char *)&res,(char *)hp->h_addr);
 817   }
 818
 819   if (res == (uint32)-1) return(0);
 820
 821   return(res);
 822 }
 823
 824 /*******************************************************************
 825   a convenient addition to interpret_addr()
 826   ******************************************************************/
 827 struct in_addr *interpret_addr2(char *str)
 828 {
 829   static struct in_addr ret;
 830   uint32 a = interpret_addr(str);
 831   ret.s_addr = a;
 832   return(&ret);
 833 }
 834
 835 /*******************************************************************
 836   check if an IP is the 0.0.0.0
 837   ******************************************************************/
 838 BOOL zero_ip(struct in_addr ip)
 839 {
 840   uint32 a;
 841   putip((char *)&a,(char *)&ip);
 842   return(a == 0);
 843 }
 844
 845
 846 #if (defined(HAVE_NETGROUP) && defined(WITH_AUTOMOUNT))
 847 /******************************************************************
 848  Remove any mount options such as -rsize=2048,wsize=2048 etc.
 849  Based on a fix from <Thomas.Hepper@icem.de>.
 850 *******************************************************************/
 851
 852 static void strip_mount_options( pstring *str)
 853 {
 854   if (**str == '-')
 855   {
 856     char *p = *str;
 857     while(*p && !isspace(*p))
 858       p++;
 859     while(*p && isspace(*p))
 860       p++;
 861     if(*p) {
 862       pstring tmp_str;
 863
 864       pstrcpy(tmp_str, p);
 865       pstrcpy(*str, tmp_str);
 866     }
 867   }
 868 }
 869
 870 /*******************************************************************
 871  Patch from jkf@soton.ac.uk
 872  Split Luke's automount_server into YP lookup and string splitter
 873  so can easily implement automount_path().
 874  As we may end up doing both, cache the last YP result.
 875 *******************************************************************/
 876
 877 #ifdef WITH_NISPLUS_HOME
 878 char *automount_lookup(char *user_name)
 879 {
 880   static fstring last_key = "";
 881   static pstring last_value = "";
 882
 883   char *nis_map = (char *)lp_nis_home_map_name();
 884
 885   char buffer[NIS_MAXATTRVAL + 1];
 886   nis_result *result;
 887   nis_object *object;
 888   entry_obj  *entry;
 889
 890   if (strcmp(user_name, last_key))
 891   {
 892     slprintf(buffer, sizeof(buffer)-1, "[key=%s],%s", user_name, nis_map);
 893     DEBUG(5, ("NIS+ querystring: %s\n", buffer));
 894
 895     if (result = nis_list(buffer, FOLLOW_PATH|EXPAND_NAME|HARD_LOOKUP, NULL, NULL))
 896     {
 897        if (result->status != NIS_SUCCESS)
 898       {
 899         DEBUG(3, ("NIS+ query failed: %s\n", nis_sperrno(result->status)));
 900         fstrcpy(last_key, ""); pstrcpy(last_value, "");
 901       }
 902       else
 903       {
 904         object = result->objects.objects_val;
 905         if (object->zo_data.zo_type == ENTRY_OBJ)
 906         {
 907            entry = &object->zo_data.objdata_u.en_data;
 908            DEBUG(5, ("NIS+ entry type: %s\n", entry->en_type));
 909            DEBUG(3, ("NIS+ result: %s\n", entry->en_cols.en_cols_val[1].ec_value.ec_value_val));
 910
 911            pstrcpy(last_value, entry->en_cols.en_cols_val[1].ec_value.ec_value_val);
 912            pstring_sub(last_value, "&", user_name);
 913            fstrcpy(last_key, user_name);
 914         }
 915       }
 916     }
 917     nis_freeresult(result);
 918   }
 919
 920   strip_mount_options(&last_value);
 921
 922   DEBUG(4, ("NIS+ Lookup: %s resulted in %s\n", user_name, last_value));
 923   return last_value;
 924 }
 925 #else /* WITH_NISPLUS_HOME */
 926 char *automount_lookup(char *user_name)
 927 {
 928   static fstring last_key = "";
 929   static pstring last_value = "";
 930
 931   int nis_error;        /* returned by yp all functions */
 932   char *nis_result;     /* yp_match inits this */
 933   int nis_result_len;  /* and set this */
 934   char *nis_domain;     /* yp_get_default_domain inits this */
 935   char *nis_map = (char *)lp_nis_home_map_name();
 936
 937   if ((nis_error = yp_get_default_domain(&nis_domain)) != 0) {
 938     DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error)));
 939     return last_value;
 940   }
 941
 942   DEBUG(5, ("NIS Domain: %s\n", nis_domain));
 943
 944   if (!strcmp(user_name, last_key)) {
 945         nis_result = last_value;
 946     nis_result_len = strlen(last_value);
 947     nis_error = 0;
 948
 949   } else {
 950
 951     if ((nis_error = yp_match(nis_domain, nis_map,
 952                               user_name, strlen(user_name),
 953                               &nis_result, &nis_result_len)) == 0) {
 954        if (!nis_error && nis_result_len >= sizeof(pstring)) {
 955                nis_result_len = sizeof(pstring)-1;
 956        }
 957        fstrcpy(last_key, user_name);
 958        strncpy(last_value, nis_result, nis_result_len);
 959        last_value[nis_result_len] = '\0';
 960         strip_mount_options(&last_value);
 961
 962     } else if(nis_error == YPERR_KEY) {
 963
 964     /* If Key lookup fails user home server is not in nis_map
 965        use default information for server, and home directory */
 966        last_value[0] = 0;
 967        DEBUG(3, ("YP Key not found:  while looking up \"%s\" in map \"%s\"\n",
 968                 user_name, nis_map));
 969        DEBUG(3, ("using defaults for server and home directory\n"));
 970     } else {
 971        DEBUG(3, ("YP Error: \"%s\" while looking up \"%s\" in map \"%s\"\n",
 972                yperr_string(nis_error), user_name, nis_map));
 973     }
 974   }
 975
 976
 977   DEBUG(4, ("YP Lookup: %s resulted in %s\n", user_name, last_value));
 978   return last_value;
 979 }
 980 #endif /* WITH_NISPLUS_HOME */
 981 #endif
 982
 983
 984 /*******************************************************************
 985 are two IPs on the same subnet?
 986 ********************************************************************/
 987 BOOL same_net(struct in_addr ip1,struct in_addr ip2,struct in_addr mask)
 988 {
 989   uint32 net1,net2,nmask;
 990
 991   nmask = ntohl(mask.s_addr);
 992   net1  = ntohl(ip1.s_addr);
 993   net2  = ntohl(ip2.s_addr);
 994
 995   return((net1 & nmask) == (net2 & nmask));
 996 }
 997
 998
 999 /****************************************************************************
1000 check if a process exists. Does this work on all unixes?
1001 ****************************************************************************/
1002
1003 BOOL process_exists(pid_t pid)
1004 {
1005         return(kill(pid,0) == 0 || errno != ESRCH);
1006 }
1007
1008
1009 /*******************************************************************
1010  Convert a uid into a user name.
1011 ********************************************************************/
1012
1013 char *uidtoname(uid_t uid)
1014 {
1015         static fstring name;
1016         struct passwd *pass;
1017
1018         if (winbind_uidtoname(name, uid))
1019                 return name;
1020
1021         pass = sys_getpwuid(uid);
1022         if (pass) return(pass->pw_name);
1023         slprintf(name, sizeof(name) - 1, "%d",(int)uid);
1024         return(name);
1025 }
1026
1027
1028 /*******************************************************************
1029  Convert a gid into a group name.
1030 ********************************************************************/
1031
1032 char *gidtoname(gid_t gid)
1033 {
1034         static fstring name;
1035         struct group *grp;
1036
1037         if (winbind_gidtoname(name, gid))
1038                 return name;
1039
1040         grp = getgrgid(gid);
1041         if (grp) return(grp->gr_name);
1042         slprintf(name,sizeof(name) - 1, "%d",(int)gid);
1043         return(name);
1044 }
1045
1046 /*******************************************************************
1047  Convert a user name into a uid. If winbindd is present uses this.
1048 ********************************************************************/
1049
1050 uid_t nametouid(char *name)
1051 {
1052         struct passwd *pass;
1053         char *p;
1054         uid_t u;
1055
1056         u = (uid_t)strtol(name, &p, 0);
1057         if ((p != name) && (*p == '\0'))
1058                 return u;
1059
1060         if (winbind_nametouid(&u, name))
1061                 return u;
1062
1063         pass = sys_getpwnam(name);
1064         if (pass)
1065                 return(pass->pw_uid);
1066         return (uid_t)-1;
1067 }
1068
1069 /*******************************************************************
1070  Convert a name to a gid_t if possible. Return -1 if not a group. If winbindd
1071  is present does a shortcut lookup...
1072 ********************************************************************/
1073
1074 gid_t nametogid(char *name)
1075 {
1076         struct group *grp;
1077         char *p;
1078         gid_t g;
1079
1080         g = (gid_t)strtol(name, &p, 0);
1081         if ((p != name) && (*p == '\0'))
1082                 return g;
1083
1084         if (winbind_nametogid(&g, name))
1085                 return g;
1086
1087         grp = getgrnam(name);
1088         if (grp)
1089                 return(grp->gr_gid);
1090         return (gid_t)-1;
1091 }
1092
1093 /*******************************************************************
1094 something really nasty happened - panic!
1095 ********************************************************************/
1096 void smb_panic(char *why)
1097 {
1098         char *cmd = lp_panic_action();
1099         if (cmd && *cmd) {
1100                 system(cmd);
1101         }
1102         DEBUG(0,("PANIC: %s\n", why));
1103         dbgflush();
1104         abort();
1105 }
1106
1107
1108 /*******************************************************************
1109 a readdir wrapper which just returns the file name
1110 ********************************************************************/
1111 char *readdirname(DIR *p)
1112 {
1113         SMB_STRUCT_DIRENT *ptr;
1114         char *dname;
1115
1116         if (!p) return(NULL);
1117
1118         ptr = (SMB_STRUCT_DIRENT *)sys_readdir(p);
1119         if (!ptr) return(NULL);
1120
1121         dname = ptr->d_name;
1122
1123 #ifdef NEXT2
1124         if (telldir(p) < 0) return(NULL);
1125 #endif
1126
1127 #ifdef HAVE_BROKEN_READDIR
1128         /* using /usr/ucb/cc is BAD */
1129         dname = dname - 2;
1130 #endif
1131
1132         {
1133                 static pstring buf;
1134                 int len = NAMLEN(ptr);
1135                 memcpy(buf, dname, len);
1136                 buf[len] = 0;
1137                 dname = buf;
1138         }
1139
1140         return(dname);
1141 }
1142
1143 /*******************************************************************
1144  Utility function used to decide if the last component
1145  of a path matches a (possibly wildcarded) entry in a namelist.
1146 ********************************************************************/
1147
1148 BOOL is_in_path(char *name, name_compare_entry *namelist)
1149 {
1150   pstring last_component;
1151   char *p;
1152
1153   DEBUG(8, ("is_in_path: %s\n", name));
1154
1155   /* if we have no list it's obviously not in the path */
1156   if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL)))
1157   {
1158     DEBUG(8,("is_in_path: no name list.\n"));
1159     return False;
1160   }
1161
1162   /* Get the last component of the unix name. */
1163   p = strrchr(name, '/');
1164   strncpy(last_component, p ? ++p : name, sizeof(last_component)-1);
1165   last_component[sizeof(last_component)-1] = '\0';
1166
1167   for(; namelist->name != NULL; namelist++)
1168   {
1169     if(namelist->is_wild)
1170     {
1171       if (mask_match(last_component, namelist->name, case_sensitive))
1172       {
1173          DEBUG(8,("is_in_path: mask match succeeded\n"));
1174          return True;
1175       }
1176     }
1177     else
1178     {
1179       if((case_sensitive && (strcmp(last_component, namelist->name) == 0))||
1180        (!case_sensitive && (StrCaseCmp(last_component, namelist->name) == 0)))
1181         {
1182          DEBUG(8,("is_in_path: match succeeded\n"));
1183          return True;
1184         }
1185     }
1186   }
1187   DEBUG(8,("is_in_path: match not found\n"));
1188
1189   return False;
1190 }
1191
1192 /*******************************************************************
1193  Strip a '/' separated list into an array of
1194  name_compare_enties structures suitable for
1195  passing to is_in_path(). We do this for
1196  speed so we can pre-parse all the names in the list
1197  and don't do it for each call to is_in_path().
1198  namelist is modified here and is assumed to be
1199  a copy owned by the caller.
1200  We also check if the entry contains a wildcard to
1201  remove a potentially expensive call to mask_match
1202  if possible.
1203 ********************************************************************/
1204
1205 void set_namearray(name_compare_entry **ppname_array, char *namelist)
1206 {
1207   char *name_end;
1208   char *nameptr = namelist;
1209   int num_entries = 0;
1210   int i;
1211
1212   (*ppname_array) = NULL;
1213
1214   if((nameptr == NULL ) || ((nameptr != NULL) && (*nameptr == '\0')))
1215     return;
1216
1217   /* We need to make two passes over the string. The
1218      first to count the number of elements, the second
1219      to split it.
1220    */
1221   while(*nameptr)
1222     {
1223       if ( *nameptr == '/' )
1224         {
1225           /* cope with multiple (useless) /s) */
1226           nameptr++;
1227           continue;
1228         }
1229       /* find the next / */
1230       name_end = strchr(nameptr, '/');
1231
1232       /* oops - the last check for a / didn't find one. */
1233       if (name_end == NULL)
1234         break;
1235
1236       /* next segment please */
1237       nameptr = name_end + 1;
1238       num_entries++;
1239     }
1240
1241   if(num_entries == 0)
1242     return;
1243
1244   if(( (*ppname_array) = (name_compare_entry *)malloc(
1245            (num_entries + 1) * sizeof(name_compare_entry))) == NULL)
1246         {
1247     DEBUG(0,("set_namearray: malloc fail\n"));
1248     return;
1249         }
1250
1251   /* Now copy out the names */
1252   nameptr = namelist;
1253   i = 0;
1254   while(*nameptr)
1255              {
1256       if ( *nameptr == '/' )
1257       {
1258           /* cope with multiple (useless) /s) */
1259           nameptr++;
1260           continue;
1261       }
1262       /* find the next / */
1263       if ((name_end = strchr(nameptr, '/')) != NULL)
1264       {
1265           *name_end = 0;
1266          }
1267
1268       /* oops - the last check for a / didn't find one. */
1269       if(name_end == NULL)
1270         break;
1271
1272       (*ppname_array)[i].is_wild = ms_has_wild(nameptr);
1273       if(((*ppname_array)[i].name = strdup(nameptr)) == NULL)
1274       {
1275         DEBUG(0,("set_namearray: malloc fail (1)\n"));
1276         return;
1277       }
1278
1279       /* next segment please */
1280       nameptr = name_end + 1;
1281       i++;
1282     }
1283
1284   (*ppname_array)[i].name = NULL;
1285
1286   return;
1287 }
1288
1289 /****************************************************************************
1290 routine to free a namearray.
1291 ****************************************************************************/
1292
1293 void free_namearray(name_compare_entry *name_array)
1294 {
1295   if(name_array == 0)
1296     return;
1297
1298   if(name_array->name != NULL)
1299     free(name_array->name);
1300
1301   free((char *)name_array);
1302 }
1303
1304 /****************************************************************************
1305  Simple routine to do POSIX file locking. Cruft in NFS and 64->32 bit mapping
1306  is dealt with in posix.c
1307 ****************************************************************************/
1308
1309 BOOL fcntl_lock(int fd, int op, SMB_OFF_T offset, SMB_OFF_T count, int type)
1310 {
1311   SMB_STRUCT_FLOCK lock;
1312   int ret;
1313
1314   DEBUG(8,("fcntl_lock %d %d %.0f %.0f %d\n",fd,op,(double)offset,(double)count,type));
1315
1316   lock.l_type = type;
1317   lock.l_whence = SEEK_SET;
1318   lock.l_start = offset;
1319   lock.l_len = count;
1320   lock.l_pid = 0;
1321
1322   errno = 0;
1323
1324   ret = fcntl(fd,op,&lock);
1325
1326   if (errno != 0)
1327     DEBUG(3,("fcntl_lock: fcntl lock gave errno %d (%s)\n",errno,strerror(errno)));
1328
1329   /* a lock query */
1330   if (op == SMB_F_GETLK)
1331   {
1332     if ((ret != -1) &&
1333         (lock.l_type != F_UNLCK) &&
1334         (lock.l_pid != 0) &&
1335         (lock.l_pid != sys_getpid()))
1336     {
1337       DEBUG(3,("fcntl_lock: fd %d is locked by pid %d\n",fd,(int)lock.l_pid));
1338       return(True);
1339     }
1340
1341     /* it must be not locked or locked by me */
1342     return(False);
1343   }
1344
1345   /* a lock set or unset */
1346   if (ret == -1)
1347   {
1348     DEBUG(3,("fcntl_lock: lock failed at offset %.0f count %.0f op %d type %d (%s)\n",
1349           (double)offset,(double)count,op,type,strerror(errno)));
1350     return(False);
1351   }
1352
1353   /* everything went OK */
1354   DEBUG(8,("fcntl_lock: Lock call successful\n"));
1355
1356   return(True);
1357 }
1358
1359 /*******************************************************************
1360 is the name specified one of my netbios names
1361 returns true is it is equal, false otherwise
1362 ********************************************************************/
1363 BOOL is_myname(char *s)
1364 {
1365   int n;
1366   BOOL ret = False;
1367
1368   for (n=0; my_netbios_names[n]; n++) {
1369     if (strequal(my_netbios_names[n], s))
1370       ret=True;
1371   }
1372   DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret));
1373   return(ret);
1374 }
1375
1376 /*******************************************************************
1377 set the horrid remote_arch string based on an enum.
1378 ********************************************************************/
1379 void set_remote_arch(enum remote_arch_types type)
1380 {
1381   extern fstring remote_arch;
1382   ra_type = type;
1383   switch( type )
1384   {
1385   case RA_WFWG:
1386     fstrcpy(remote_arch, "WfWg");
1387     return;
1388   case RA_OS2:
1389     fstrcpy(remote_arch, "OS2");
1390     return;
1391   case RA_WIN95:
1392     fstrcpy(remote_arch, "Win95");
1393     return;
1394   case RA_WINNT:
1395     fstrcpy(remote_arch, "WinNT");
1396     return;
1397   case RA_WIN2K:
1398     fstrcpy(remote_arch, "Win2K");
1399     return;
1400   case RA_SAMBA:
1401     fstrcpy(remote_arch,"Samba");
1402     return;
1403   default:
1404     ra_type = RA_UNKNOWN;
1405     fstrcpy(remote_arch, "UNKNOWN");
1406     break;
1407   }
1408 }
1409
1410 /*******************************************************************
1411  Get the remote_arch type.
1412 ********************************************************************/
1413 enum remote_arch_types get_remote_arch(void)
1414 {
1415   return ra_type;
1416 }
1417
1418
1419 void out_ascii(FILE *f, unsigned char *buf,int len)
1420 {
1421         int i;
1422         for (i=0;i<len;i++)
1423         {
1424                 fprintf(f, "%c", isprint(buf[i])?buf[i]:'.');
1425         }
1426 }
1427
1428 void out_data(FILE *f,char *buf1,int len, int per_line)
1429 {
1430         unsigned char *buf = (unsigned char *)buf1;
1431         int i=0;
1432         if (len<=0)
1433         {
1434                 return;
1435         }
1436
1437         fprintf(f, "[%03X] ",i);
1438         for (i=0;i<len;)
1439         {
1440                 fprintf(f, "%02X ",(int)buf[i]);
1441                 i++;
1442                 if (i%(per_line/2) == 0) fprintf(f, " ");
1443                 if (i%per_line == 0)
1444                 {
1445                         out_ascii(f,&buf[i-per_line  ],per_line/2); fprintf(f, " ");
1446                         out_ascii(f,&buf[i-per_line/2],per_line/2); fprintf(f, "\n");
1447                         if (i<len) fprintf(f, "[%03X] ",i);
1448                 }
1449         }
1450         if ((i%per_line) != 0)
1451         {
1452                 int n;
1453
1454                 n = per_line - (i%per_line);
1455                 fprintf(f, " ");
1456                 if (n>(per_line/2)) fprintf(f, " ");
1457                 while (n--)
1458                 {
1459                         fprintf(f, "   ");
1460                 }
1461                 n = MIN(per_line/2,i%per_line);
1462                 out_ascii(f,&buf[i-(i%per_line)],n); fprintf(f, " ");
1463                 n = (i%per_line) - n;
1464                 if (n>0) out_ascii(f,&buf[i-n],n);
1465                 fprintf(f, "\n");
1466         }
1467 }
1468
1469 void print_asc(int level, unsigned char *buf,int len)
1470 {
1471         int i;
1472         for (i=0;i<len;i++)
1473                 DEBUG(level,("%c", isprint(buf[i])?buf[i]:'.'));
1474 }
1475
1476 void dump_data(int level,char *buf1,int len)
1477 {
1478   unsigned char *buf = (unsigned char *)buf1;
1479   int i=0;
1480   if (len<=0) return;
1481
1482   DEBUG(level,("[%03X] ",i));
1483   for (i=0;i<len;) {
1484     DEBUG(level,("%02X ",(int)buf[i]));
1485     i++;
1486     if (i%8 == 0) DEBUG(level,(" "));
1487     if (i%16 == 0) {
1488       print_asc(level,&buf[i-16],8); DEBUG(level,(" "));
1489       print_asc(level,&buf[i-8],8); DEBUG(level,("\n"));
1490       if (i<len) DEBUG(level,("[%03X] ",i));
1491     }
1492   }
1493   if (i%16) {
1494     int n;
1495
1496     n = 16 - (i%16);
1497     DEBUG(level,(" "));
1498     if (n>8) DEBUG(level,(" "));
1499     while (n--) DEBUG(level,("   "));
1500
1501     n = MIN(8,i%16);
1502     print_asc(level,&buf[i-(i%16)],n); DEBUG(level,(" "));
1503     n = (i%16) - n;
1504     if (n>0) print_asc(level,&buf[i-n],n);
1505     DEBUG(level,("\n"));
1506   }
1507 }
1508
1509 char *tab_depth(int depth)
1510 {
1511         static pstring spaces;
1512         memset(spaces, ' ', depth * 4);
1513         spaces[depth * 4] = 0;
1514         return spaces;
1515 }
1516
1517 /*****************************************************************************
1518  * Provide a checksum on a string
1519  *
1520  *  Input:  s - the null-terminated character string for which the checksum
1521  *              will be calculated.
1522  *
1523  *  Output: The checksum value calculated for s.
1524  *
1525  * ****************************************************************************
1526  */
1527 int str_checksum(const char *s)
1528 {
1529         int res = 0;
1530         int c;
1531         int i=0;
1532
1533         while(*s) {
1534                 c = *s;
1535                 res ^= (c << (i % 15)) ^ (c >> (15-(i%15)));
1536                 s++;
1537                 i++;
1538         }
1539         return(res);
1540 } /* str_checksum */
1541
1542
1543
1544 /*****************************************************************
1545 zero a memory area then free it. Used to catch bugs faster
1546 *****************************************************************/
1547 void zero_free(void *p, size_t size)
1548 {
1549         memset(p, 0, size);
1550         free(p);
1551 }
1552
1553
1554 /*****************************************************************
1555 set our open file limit to a requested max and return the limit
1556 *****************************************************************/
1557 int set_maxfiles(int requested_max)
1558 {
1559 #if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE))
1560         struct rlimit rlp;
1561         int saved_current_limit;
1562
1563         if(getrlimit(RLIMIT_NOFILE, &rlp)) {
1564                 DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n",
1565                         strerror(errno) ));
1566                 /* just guess... */
1567                 return requested_max;
1568         }
1569
1570         /*
1571      * Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to
1572          * account for the extra fd we need
1573          * as well as the log files and standard
1574          * handles etc. Save the limit we want to set in case
1575          * we are running on an OS that doesn't support this limit (AIX)
1576          * which always returns RLIM_INFINITY for rlp.rlim_max.
1577          */
1578
1579         /* Try raising the hard (max) limit to the requested amount. */
1580
1581 #if defined(RLIM_INFINITY)
1582         if (rlp.rlim_max != RLIM_INFINITY) {
1583                 int orig_max = rlp.rlim_max;
1584
1585                 if ( rlp.rlim_max < requested_max )
1586                         rlp.rlim_max = requested_max;
1587
1588                 /* This failing is not an error - many systems (Linux) don't
1589                         support our default request of 10,000 open files. JRA. */
1590
1591                 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
1592                         DEBUG(3,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d max files failed with error %s\n",
1593                                 (int)rlp.rlim_max, strerror(errno) ));
1594
1595                         /* Set failed - restore original value from get. */
1596                         rlp.rlim_max = orig_max;
1597                 }
1598         }
1599 #endif
1600
1601         /* Now try setting the soft (current) limit. */
1602
1603         saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);
1604
1605         if(setrlimit(RLIMIT_NOFILE, &rlp)) {
1606                 DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n",
1607                         (int)rlp.rlim_cur, strerror(errno) ));
1608                 /* just guess... */
1609                 return saved_current_limit;
1610         }
1611
1612         if(getrlimit(RLIMIT_NOFILE, &rlp)) {
1613                 DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n",
1614                         strerror(errno) ));
1615                 /* just guess... */
1616                 return saved_current_limit;
1617     }
1618
1619 #if defined(RLIM_INFINITY)
1620         if(rlp.rlim_cur == RLIM_INFINITY)
1621                 return saved_current_limit;
1622 #endif
1623
1624     if((int)rlp.rlim_cur > saved_current_limit)
1625                 return saved_current_limit;
1626
1627         return rlp.rlim_cur;
1628 #else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */
1629         /*
1630          * No way to know - just guess...
1631          */
1632         return requested_max;
1633 #endif
1634 }
1635
1636 /*****************************************************************
1637  splits out the start of the key (HKLM or HKU) and the rest of the key
1638  *****************************************************************/
1639 BOOL reg_split_key(char *full_keyname, uint32 *reg_type, char *key_name)
1640 {
1641         pstring tmp;
1642
1643         if (!next_token(&full_keyname, tmp, "\\", sizeof(tmp)))
1644         {
1645                 return False;
1646         }
1647
1648         (*reg_type) = 0;
1649
1650         DEBUG(10, ("reg_split_key: hive %s\n", tmp));
1651
1652         if (strequal(tmp, "HKLM") || strequal(tmp, "HKEY_LOCAL_MACHINE"))
1653         {
1654                 (*reg_type) = HKEY_LOCAL_MACHINE;
1655         }
1656         else if (strequal(tmp, "HKU") || strequal(tmp, "HKEY_USERS"))
1657         {
1658                 (*reg_type) = HKEY_USERS;
1659         }
1660         else
1661         {
1662                 DEBUG(10,("reg_split_key: unrecognised hive key %s\n", tmp));
1663                 return False;
1664         }
1665
1666         if (next_token(NULL, tmp, "\n\r", sizeof(tmp)))
1667         {
1668                 fstrcpy(key_name, tmp);
1669         }
1670         else
1671         {
1672                 key_name[0] = 0;
1673         }
1674
1675         DEBUG(10, ("reg_split_key: name %s\n", key_name));
1676
1677         return True;
1678 }
1679
1680
1681 /*****************************************************************
1682 possibly replace mkstemp if it is broken
1683 *****************************************************************/
1684 int smb_mkstemp(char *template)
1685 {
1686 #if HAVE_SECURE_MKSTEMP
1687         return mkstemp(template);
1688 #else
1689         /* have a reasonable go at emulating it. Hope that
1690            the system mktemp() isn't completly hopeless */
1691         char *p = mktemp(template);
1692         if (!p) return -1;
1693         return open(p, O_CREAT|O_EXCL|O_RDWR, 0600);
1694 #endif
1695 }
1696
1697 /*****************************************************************
1698 like strdup but for memory
1699  *****************************************************************/
1700 void *memdup(void *p, size_t size)
1701 {
1702         void *p2;
1703         if (size == 0) return NULL;
1704         p2 = malloc(size);
1705         if (!p2) return NULL;
1706         memcpy(p2, p, size);
1707         return p2;
1708 }
1709
1710 /*****************************************************************
1711 get local hostname and cache result
1712  *****************************************************************/
1713 char *myhostname(void)
1714 {
1715         static pstring ret;
1716         if (ret[0] == 0) {
1717                 get_myname(ret);
1718         }
1719         return ret;
1720 }
1721
1722
1723 /*****************************************************************
1724 a useful function for returning a path in the Samba lock directory
1725  *****************************************************************/
1726 char *lock_path(char *name)
1727 {
1728         static pstring fname;
1729
1730         pstrcpy(fname,lp_lockdir());
1731         trim_string(fname,"","/");
1732
1733         if (!directory_exist(fname,NULL)) {
1734                 mkdir(fname,0755);
1735         }
1736
1737         pstrcat(fname,"/");
1738         pstrcat(fname,name);
1739
1740         return fname;
1741 }
1742
1743 /*******************************************************************
1744  Given a filename - get its directory name
1745  NB: Returned in static storage.  Caveats:
1746  o  Not safe in thread environment.
1747  o  Caller must not free.
1748  o  If caller wishes to preserve, they should copy.
1749 ********************************************************************/
1750
1751 char *parent_dirname(const char *path)
1752 {
1753         static pstring dirpath;
1754         char *p;
1755
1756         if (!path)
1757                 return(NULL);
1758
1759         pstrcpy(dirpath, path);
1760         p = strrchr(dirpath, '/');  /* Find final '/', if any */
1761         if (!p) {
1762                 pstrcpy(dirpath, ".");    /* No final "/", so dir is "." */
1763         } else {
1764                 if (p == dirpath)
1765                         ++p;    /* For root "/", leave "/" in place */
1766                 *p = '\0';
1767         }
1768         return dirpath;
1769 }
1770
1771
1772 /*******************************************************************
1773 determine if a pattern contains any Microsoft wildcard characters
1774  *******************************************************************/
1775 BOOL ms_has_wild(char *s)
1776 {
1777         char c;
1778         while ((c = *s++)) {
1779                 switch (c) {
1780                 case '*':
1781                 case '?':
1782                 case '<':
1783                 case '>':
1784                 case '"':
1785                         return True;
1786                 }
1787         }
1788         return False;
1789 }
1790
1791 /*******************************************************************
1792  a wrapper that handles case sensitivity and the special handling
1793    of the ".." name
1794  *******************************************************************/
1795 BOOL mask_match(char *string, char *pattern, BOOL is_case_sensitive)
1796 {
1797         fstring p2, s2;
1798         if (strcmp(string,"..") == 0) string = ".";
1799         if (strcmp(pattern,".") == 0) return False;
1800
1801         if (is_case_sensitive) {
1802                 return ms_fnmatch(pattern, string) == 0;
1803         }
1804
1805         fstrcpy(p2, pattern);
1806         fstrcpy(s2, string);
1807         strlower(p2);
1808         strlower(s2);
1809         return ms_fnmatch(p2, s2) == 0;
1810 }
1811
1812 /*******************************************************************
1813  Simple case insensitive interface to ms_fnmatch.
1814 *******************************************************************/
1815
1816 BOOL wild_match(char *string, char *pattern)
1817 {
1818         pstring p2, s2;
1819
1820         pstrcpy(p2, pattern);
1821         pstrcpy(s2, string);
1822         strlower(p2);
1823         strlower(s2);
1824         return ms_fnmatch(p2, s2) == 0;
1825 }
1826
1827 #ifdef __INSURE__
1828
1829 /*******************************************************************
1830 This routine is a trick to immediately catch errors when debugging
1831 with insure. A xterm with a gdb is popped up when insure catches
1832 a error. It is Linux specific.
1833 ********************************************************************/
1834 int _Insure_trap_error(int a1, int a2, int a3, int a4, int a5, int a6)
1835 {
1836         static int (*fn)();
1837         int ret;
1838         char pidstr[10];
1839         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'";
1840
1841         slprintf(pidstr, sizeof(pidstr)-1, "%d", sys_getpid());
1842         pstring_sub(cmd, "%d", pidstr);
1843
1844         if (!fn) {
1845                 static void *h;
1846                 h = dlopen("/usr/local/parasoft/insure++lite/lib.linux2/libinsure.so", RTLD_LAZY);
1847                 fn = dlsym(h, "_Insure_trap_error");
1848         }
1849
1850         ret = fn(a1, a2, a3, a4, a5, a6);
1851
1852         system(cmd);
1853
1854         return ret;
1855 }
1856 #endif