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         {
 161                 return NULL;
 162         }
 163
 164         (*count) = 0;
 165         (*num  ) = NULL;
 166
 167         while ((p = Atoic(p, &val, ":,")) != NULL && (*p) != ':')
 168         {
 169                 (*num) = Realloc((*num), ((*count)+1) * sizeof(uint32));
 170                 if ((*num) == NULL)
 171                 {
 172                         return NULL;
 173                 }
 174                 (*num)[(*count)] = val;
 175                 (*count)++;
 176                 p++;
 177         }
 178
 179         return p;
 180 }
 181
 182
 183 /*******************************************************************
 184   check if a file exists - call vfs_file_exist for samba files
 185 ********************************************************************/
 186 BOOL file_exist(char *fname,SMB_STRUCT_STAT *sbuf)
 187 {
 188   SMB_STRUCT_STAT st;
 189   if (!sbuf) sbuf = &st;
 190
 191   if (sys_stat(fname,sbuf) != 0)
 192     return(False);
 193
 194   return(S_ISREG(sbuf->st_mode));
 195 }
 196
 197 /*******************************************************************
 198   rename a unix file
 199 ********************************************************************/
 200 int file_rename(char *from, char *to)
 201 {
 202         int rcode = rename (from, to);
 203
 204         if (errno == EXDEV)
 205         {
 206                 /* Rename across filesystems needed. */
 207                 rcode = copy_reg (from, to);
 208         }
 209         return rcode;
 210 }
 211
 212 /*******************************************************************
 213 check a files mod time
 214 ********************************************************************/
 215 time_t file_modtime(char *fname)
 216 {
 217   SMB_STRUCT_STAT st;
 218
 219   if (sys_stat(fname,&st) != 0)
 220     return(0);
 221
 222   return(st.st_mtime);
 223 }
 224
 225 /*******************************************************************
 226   check if a directory exists
 227 ********************************************************************/
 228 BOOL directory_exist(char *dname,SMB_STRUCT_STAT *st)
 229 {
 230   SMB_STRUCT_STAT st2;
 231   BOOL ret;
 232
 233   if (!st) st = &st2;
 234
 235   if (sys_stat(dname,st) != 0)
 236     return(False);
 237
 238   ret = S_ISDIR(st->st_mode);
 239   if(!ret)
 240     errno = ENOTDIR;
 241   return ret;
 242 }
 243
 244 /*******************************************************************
 245 returns the size in bytes of the named file
 246 ********************************************************************/
 247 SMB_OFF_T get_file_size(char *file_name)
 248 {
 249   SMB_STRUCT_STAT buf;
 250   buf.st_size = 0;
 251   if(sys_stat(file_name,&buf) != 0)
 252     return (SMB_OFF_T)-1;
 253   return(buf.st_size);
 254 }
 255
 256 /*******************************************************************
 257 return a string representing an attribute for a file
 258 ********************************************************************/
 259 char *attrib_string(uint16 mode)
 260 {
 261   static fstring attrstr;
 262
 263   attrstr[0] = 0;
 264
 265   if (mode & aVOLID) fstrcat(attrstr,"V");
 266   if (mode & aDIR) fstrcat(attrstr,"D");
 267   if (mode & aARCH) fstrcat(attrstr,"A");
 268   if (mode & aHIDDEN) fstrcat(attrstr,"H");
 269   if (mode & aSYSTEM) fstrcat(attrstr,"S");
 270   if (mode & aRONLY) fstrcat(attrstr,"R");
 271
 272   return(attrstr);
 273 }
 274
 275 /*******************************************************************
 276   show a smb message structure
 277 ********************************************************************/
 278 void show_msg(char *buf)
 279 {
 280         int i;
 281         int bcc=0;
 282
 283         if (DEBUGLEVEL < 5) return;
 284
 285         DEBUG(5,("size=%d\nsmb_com=0x%x\nsmb_rcls=%d\nsmb_reh=%d\nsmb_err=%d\nsmb_flg=%d\nsmb_flg2=%d\n",
 286                         smb_len(buf),
 287                         (int)CVAL(buf,smb_com),
 288                         (int)CVAL(buf,smb_rcls),
 289                         (int)CVAL(buf,smb_reh),
 290                         (int)SVAL(buf,smb_err),
 291                         (int)CVAL(buf,smb_flg),
 292                         (int)SVAL(buf,smb_flg2)));
 293         DEBUG(5,("smb_tid=%d\nsmb_pid=%d\nsmb_uid=%d\nsmb_mid=%d\nsmt_wct=%d\n",
 294                         (int)SVAL(buf,smb_tid),
 295                         (int)SVAL(buf,smb_pid),
 296                         (int)SVAL(buf,smb_uid),
 297                         (int)SVAL(buf,smb_mid),
 298                         (int)CVAL(buf,smb_wct)));
 299
 300         for (i=0;i<(int)CVAL(buf,smb_wct);i++)
 301         {
 302                 DEBUG(5,("smb_vwv[%d]=%d (0x%X)\n",i,
 303                         SVAL(buf,smb_vwv+2*i),SVAL(buf,smb_vwv+2*i)));
 304         }
 305
 306         bcc = (int)SVAL(buf,smb_vwv+2*(CVAL(buf,smb_wct)));
 307
 308         DEBUG(5,("smb_bcc=%d\n",bcc));
 309
 310         if (DEBUGLEVEL < 10) return;
 311
 312         if (DEBUGLEVEL < 50)
 313         {
 314                 bcc = MIN(bcc, 512);
 315         }
 316
 317         dump_data(10, smb_buf(buf), bcc);
 318 }
 319
 320 /*******************************************************************
 321   set the length and marker of an smb packet
 322 ********************************************************************/
 323 void smb_setlen(char *buf,int len)
 324 {
 325   _smb_setlen(buf,len);
 326
 327   CVAL(buf,4) = 0xFF;
 328   CVAL(buf,5) = 'S';
 329   CVAL(buf,6) = 'M';
 330   CVAL(buf,7) = 'B';
 331 }
 332
 333 /*******************************************************************
 334   setup the word count and byte count for a smb message
 335 ********************************************************************/
 336 int set_message(char *buf,int num_words,int num_bytes,BOOL zero)
 337 {
 338         if (zero)
 339                 memset(buf + smb_size,'\0',num_words*2 + num_bytes);
 340         CVAL(buf,smb_wct) = num_words;
 341         SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
 342         smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
 343         return (smb_size + num_words*2 + num_bytes);
 344 }
 345
 346 /*******************************************************************
 347   setup only the byte count for a smb message
 348 ********************************************************************/
 349 void set_message_bcc(char *buf,int num_bytes)
 350 {
 351         int num_words = CVAL(buf,smb_wct);
 352         SSVAL(buf,smb_vwv + num_words*SIZEOFWORD,num_bytes);
 353         smb_setlen(buf,smb_size + num_words*2 + num_bytes - 4);
 354 }
 355
 356 /*******************************************************************
 357   setup only the byte count for a smb message, using the end of the
 358   message as a marker
 359 ********************************************************************/
 360 void set_message_end(void *outbuf,void *end_ptr)
 361 {
 362         set_message_bcc((char *)outbuf,PTR_DIFF(end_ptr,smb_buf((char *)outbuf)));
 363 }
 364
 365 /*******************************************************************
 366 reduce a file name, removing .. elements.
 367 ********************************************************************/
 368 void dos_clean_name(char *s)
 369 {
 370   char *p=NULL;
 371
 372   DEBUG(3,("dos_clean_name [%s]\n",s));
 373
 374   /* remove any double slashes */
 375   all_string_sub(s, "\\\\", "\\", 0);
 376
 377   while ((p = strstr(s,"\\..\\")) != NULL)
 378     {
 379       pstring s1;
 380
 381       *p = 0;
 382       pstrcpy(s1,p+3);
 383
 384       if ((p=strrchr(s,'\\')) != NULL)
 385         *p = 0;
 386       else
 387         *s = 0;
 388       pstrcat(s,s1);
 389     }
 390
 391   trim_string(s,NULL,"\\..");
 392
 393   all_string_sub(s, "\\.\\", "\\", 0);
 394 }
 395
 396 /*******************************************************************
 397 reduce a file name, removing .. elements.
 398 ********************************************************************/
 399 void unix_clean_name(char *s)
 400 {
 401   char *p=NULL;
 402
 403   DEBUG(3,("unix_clean_name [%s]\n",s));
 404
 405   /* remove any double slashes */
 406   all_string_sub(s, "//","/", 0);
 407
 408   /* Remove leading ./ characters */
 409   if(strncmp(s, "./", 2) == 0) {
 410     trim_string(s, "./", NULL);
 411     if(*s == 0)
 412       pstrcpy(s,"./");
 413   }
 414
 415   while ((p = strstr(s,"/../")) != NULL)
 416     {
 417       pstring s1;
 418
 419       *p = 0;
 420       pstrcpy(s1,p+3);
 421
 422       if ((p=strrchr(s,'/')) != NULL)
 423         *p = 0;
 424       else
 425         *s = 0;
 426       pstrcat(s,s1);
 427     }
 428
 429   trim_string(s,NULL,"/..");
 430 }
 431
 432 /****************************************************************************
 433   make a dir struct
 434 ****************************************************************************/
 435 void make_dir_struct(char *buf,char *mask,char *fname,SMB_OFF_T size,int mode,time_t date)
 436 {
 437   char *p;
 438   pstring mask2;
 439
 440   pstrcpy(mask2,mask);
 441
 442   if ((mode & aDIR) != 0)
 443     size = 0;
 444
 445   memset(buf+1,' ',11);
 446   if ((p = strchr(mask2,'.')) != NULL)
 447     {
 448       *p = 0;
 449       memcpy(buf+1,mask2,MIN(strlen(mask2),8));
 450       memcpy(buf+9,p+1,MIN(strlen(p+1),3));
 451       *p = '.';
 452     }
 453   else
 454     memcpy(buf+1,mask2,MIN(strlen(mask2),11));
 455
 456   memset(buf+21,'\0',DIR_STRUCT_SIZE-21);
 457   CVAL(buf,21) = mode;
 458   put_dos_date(buf,22,date);
 459   SSVAL(buf,26,size & 0xFFFF);
 460   SSVAL(buf,28,(size >> 16)&0xFFFF);
 461   StrnCpy(buf+30,fname,12);
 462   if (!case_sensitive)
 463     strupper(buf+30);
 464   DEBUG(8,("put name [%s] into dir struct\n",buf+30));
 465 }
 466
 467
 468 /*******************************************************************
 469 close the low 3 fd's and open dev/null in their place
 470 ********************************************************************/
 471 void close_low_fds(void)
 472 {
 473   int fd;
 474   int i;
 475   close(0); close(1);
 476 #ifndef __INSURE__
 477   close(2);
 478 #endif
 479   /* try and use up these file descriptors, so silly
 480      library routines writing to stdout etc won't cause havoc */
 481   for (i=0;i<3;i++) {
 482     fd = sys_open("/dev/null",O_RDWR,0);
 483     if (fd < 0) fd = sys_open("/dev/null",O_WRONLY,0);
 484     if (fd < 0) {
 485       DEBUG(0,("Can't open /dev/null\n"));
 486       return;
 487     }
 488     if (fd != i) {
 489       DEBUG(0,("Didn't get file descriptor %d\n",i));
 490       return;
 491     }
 492   }
 493 }
 494
 495 /****************************************************************************
 496 Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
 497 else
 498 if SYSV use O_NDELAY
 499 if BSD use FNDELAY
 500 ****************************************************************************/
 501 int set_blocking(int fd, BOOL set)
 502 {
 503   int val;
 504 #ifdef O_NONBLOCK
 505 #define FLAG_TO_SET O_NONBLOCK
 506 #else
 507 #ifdef SYSV
 508 #define FLAG_TO_SET O_NDELAY
 509 #else /* BSD */
 510 #define FLAG_TO_SET FNDELAY
 511 #endif
 512 #endif
 513
 514   if((val = fcntl(fd, F_GETFL, 0)) == -1)
 515         return -1;
 516   if(set) /* Turn blocking on - ie. clear nonblock flag */
 517         val &= ~FLAG_TO_SET;
 518   else
 519     val |= FLAG_TO_SET;
 520   return fcntl( fd, F_SETFL, val);
 521 #undef FLAG_TO_SET
 522 }
 523
 524 /****************************************************************************
 525 transfer some data between two fd's
 526 ****************************************************************************/
 527 SMB_OFF_T transfer_file(int infd,int outfd,SMB_OFF_T n,char *header,int headlen,int align)
 528 {
 529   static char *buf=NULL;
 530   static int size=0;
 531   char *buf1,*abuf;
 532   SMB_OFF_T total = 0;
 533
 534   DEBUG(4,("transfer_file n=%.0f  (head=%d) called\n",(double)n,headlen));
 535
 536   if (size == 0) {
 537     size = lp_readsize();
 538     size = MAX(size,1024);
 539   }
 540
 541   while (!buf && size>0) {
 542     buf = (char *)Realloc(buf,size+8);
 543     if (!buf) size /= 2;
 544   }
 545
 546   if (!buf) {
 547     DEBUG(0,("Can't allocate transfer buffer!\n"));
 548     exit(1);
 549   }
 550
 551   abuf = buf + (align%8);
 552
 553   if (header)
 554     n += headlen;
 555
 556   while (n > 0)
 557   {
 558     int s = (int)MIN(n,(SMB_OFF_T)size);
 559     int ret,ret2=0;
 560
 561     ret = 0;
 562
 563     if (header && (headlen >= MIN(s,1024))) {
 564       buf1 = header;
 565       s = headlen;
 566       ret = headlen;
 567       headlen = 0;
 568       header = NULL;
 569     } else {
 570       buf1 = abuf;
 571     }
 572
 573     if (header && headlen > 0)
 574     {
 575       ret = MIN(headlen,size);
 576       memcpy(buf1,header,ret);
 577       headlen -= ret;
 578       header += ret;
 579       if (headlen <= 0) header = NULL;
 580     }
 581
 582     if (s > ret)
 583       ret += read(infd,buf1+ret,s-ret);
 584
 585     if (ret > 0)
 586     {
 587       ret2 = (outfd>=0?write_data(outfd,buf1,ret):ret);
 588       if (ret2 > 0) total += ret2;
 589       /* if we can't write then dump excess data */
 590       if (ret2 != ret)
 591         transfer_file(infd,-1,n-(ret+headlen),NULL,0,0);
 592     }
 593     if (ret <= 0 || ret2 != ret)
 594       return(total);
 595     n -= ret;
 596   }
 597   return(total);
 598 }
 599
 600
 601 /*******************************************************************
 602 sleep for a specified number of milliseconds
 603 ********************************************************************/
 604 void msleep(int t)
 605 {
 606   int tdiff=0;
 607   struct timeval tval,t1,t2;
 608   fd_set fds;
 609
 610   GetTimeOfDay(&t1);
 611   GetTimeOfDay(&t2);
 612
 613   while (tdiff < t) {
 614     tval.tv_sec = (t-tdiff)/1000;
 615     tval.tv_usec = 1000*((t-tdiff)%1000);
 616
 617     FD_ZERO(&fds);
 618     errno = 0;
 619     sys_select_intr(0,&fds,&tval);
 620
 621     GetTimeOfDay(&t2);
 622     tdiff = TvalDiff(&t1,&t2);
 623   }
 624 }
 625
 626
 627 /****************************************************************************
 628 become a daemon, discarding the controlling terminal
 629 ****************************************************************************/
 630 void become_daemon(void)
 631 {
 632         if (sys_fork()) {
 633                 _exit(0);
 634         }
 635
 636   /* detach from the terminal */
 637 #ifdef HAVE_SETSID
 638         setsid();
 639 #elif defined(TIOCNOTTY)
 640         {
 641                 int i = sys_open("/dev/tty", O_RDWR, 0);
 642                 if (i != -1) {
 643                         ioctl(i, (int) TIOCNOTTY, (char *)0);
 644                         close(i);
 645                 }
 646         }
 647 #endif /* HAVE_SETSID */
 648
 649         /* Close fd's 0,1,2. Needed if started by rsh */
 650         close_low_fds();
 651 }
 652
 653
 654 /****************************************************************************
 655 put up a yes/no prompt
 656 ****************************************************************************/
 657 BOOL yesno(char *p)
 658 {
 659   pstring ans;
 660   printf("%s",p);
 661
 662   if (!fgets(ans,sizeof(ans)-1,stdin))
 663     return(False);
 664
 665   if (*ans == 'y' || *ans == 'Y')
 666     return(True);
 667
 668   return(False);
 669 }
 670
 671 #ifdef HPUX
 672 /****************************************************************************
 673 this is a version of setbuffer() for those machines that only have setvbuf
 674 ****************************************************************************/
 675  void setbuffer(FILE *f,char *buf,int bufsize)
 676 {
 677   setvbuf(f,buf,_IOFBF,bufsize);
 678 }
 679 #endif
 680
 681 /****************************************************************************
 682 expand a pointer to be a particular size
 683 ****************************************************************************/
 684 void *Realloc(void *p,size_t size)
 685 {
 686   void *ret=NULL;
 687
 688   if (size == 0) {
 689     if (p) free(p);
 690     DEBUG(5,("Realloc asked for 0 bytes\n"));
 691     return NULL;
 692   }
 693
 694   if (!p)
 695     ret = (void *)malloc(size);
 696   else
 697     ret = (void *)realloc(p,size);
 698
 699   if (!ret)
 700     DEBUG(0,("Memory allocation error: failed to expand to %d bytes\n",(int)size));
 701
 702   return(ret);
 703 }
 704
 705
 706 /****************************************************************************
 707 free memory, checks for NULL
 708 ****************************************************************************/
 709 void safe_free(void *p)
 710 {
 711         if (p != NULL)
 712         {
 713                 free(p);
 714         }
 715 }
 716
 717
 718 /****************************************************************************
 719 get my own name and IP
 720 ****************************************************************************/
 721 BOOL get_myname(char *my_name)
 722 {
 723         pstring hostname;
 724
 725         *hostname = 0;
 726
 727         /* get my host name */
 728         if (gethostname(hostname, sizeof(hostname)) == -1) {
 729                 DEBUG(0,("gethostname failed\n"));
 730                 return False;
 731         }
 732
 733         /* Ensure null termination. */
 734         hostname[sizeof(hostname)-1] = '\0';
 735
 736         if (my_name) {
 737                 /* split off any parts after an initial . */
 738                 char *p = strchr(hostname,'.');
 739                 if (p) *p = 0;
 740
 741                 fstrcpy(my_name,hostname);
 742         }
 743
 744         return(True);
 745 }
 746
 747 /****************************************************************************
 748 interpret a protocol description string, with a default
 749 ****************************************************************************/
 750 int interpret_protocol(char *str,int def)
 751 {
 752   if (strequal(str,"NT1"))
 753     return(PROTOCOL_NT1);
 754   if (strequal(str,"LANMAN2"))
 755     return(PROTOCOL_LANMAN2);
 756   if (strequal(str,"LANMAN1"))
 757     return(PROTOCOL_LANMAN1);
 758   if (strequal(str,"CORE"))
 759     return(PROTOCOL_CORE);
 760   if (strequal(str,"COREPLUS"))
 761     return(PROTOCOL_COREPLUS);
 762   if (strequal(str,"CORE+"))
 763     return(PROTOCOL_COREPLUS);
 764
 765   DEBUG(0,("Unrecognised protocol level %s\n",str));
 766
 767   return(def);
 768 }
 769
 770 /****************************************************************************
 771  Return true if a string could be a pure IP address.
 772 ****************************************************************************/
 773
 774 BOOL is_ipaddress(const char *str)
 775 {
 776   BOOL pure_address = True;
 777   int i;
 778
 779   for (i=0; pure_address && str[i]; i++)
 780     if (!(isdigit((int)str[i]) || str[i] == '.'))
 781       pure_address = False;
 782
 783   /* Check that a pure number is not misinterpreted as an IP */
 784   pure_address = pure_address && (strchr(str, '.') != NULL);
 785
 786   return pure_address;
 787 }
 788
 789 /****************************************************************************
 790 interpret an internet address or name into an IP address in 4 byte form
 791 ****************************************************************************/
 792
 793 uint32 interpret_addr(char *str)
 794 {
 795   struct hostent *hp;
 796   uint32 res;
 797
 798   if (strcmp(str,"0.0.0.0") == 0) return(0);
 799   if (strcmp(str,"255.255.255.255") == 0) return(0xFFFFFFFF);
 800
 801   /* if it's in the form of an IP address then get the lib to interpret it */
 802   if (is_ipaddress(str)) {
 803     res = inet_addr(str);
 804   } else {
 805     /* otherwise assume it's a network name of some sort and use
 806        Get_Hostbyname */
 807     if ((hp = Get_Hostbyname(str)) == 0) {
 808       DEBUG(3,("Get_Hostbyname: Unknown host. %s\n",str));
 809       return 0;
 810     }
 811     if(hp->h_addr == NULL) {
 812       DEBUG(3,("Get_Hostbyname: host address is invalid for host %s\n",str));
 813       return 0;
 814     }
 815     putip((char *)&res,(char *)hp->h_addr);
 816   }
 817
 818   if (res == (uint32)-1) return(0);
 819
 820   return(res);
 821 }
 822
 823 /*******************************************************************
 824   a convenient addition to interpret_addr()
 825   ******************************************************************/
 826 struct in_addr *interpret_addr2(char *str)
 827 {
 828   static struct in_addr ret;
 829   uint32 a = interpret_addr(str);
 830   ret.s_addr = a;
 831   return(&ret);
 832 }
 833
 834 /*******************************************************************
 835   check if an IP is the 0.0.0.0
 836   ******************************************************************/
 837 BOOL zero_ip(struct in_addr ip)
 838 {
 839   uint32 a;
 840   putip((char *)&a,(char *)&ip);
 841   return(a == 0);
 842 }
 843
 844
 845 #if (defined(HAVE_NETGROUP) && defined(WITH_AUTOMOUNT))
 846 /******************************************************************
 847  Remove any mount options such as -rsize=2048,wsize=2048 etc.
 848  Based on a fix from <Thomas.Hepper@icem.de>.
 849 *******************************************************************/
 850
 851 static void strip_mount_options( pstring *str)
 852 {
 853   if (**str == '-')
 854   {
 855     char *p = *str;
 856     while(*p && !isspace(*p))
 857       p++;
 858     while(*p && isspace(*p))
 859       p++;
 860     if(*p) {
 861       pstring tmp_str;
 862
 863       pstrcpy(tmp_str, p);
 864       pstrcpy(*str, tmp_str);
 865     }
 866   }
 867 }
 868
 869 /*******************************************************************
 870  Patch from jkf@soton.ac.uk
 871  Split Luke's automount_server into YP lookup and string splitter
 872  so can easily implement automount_path().
 873  As we may end up doing both, cache the last YP result.
 874 *******************************************************************/
 875
 876 #ifdef WITH_NISPLUS_HOME
 877 char *automount_lookup(char *user_name)
 878 {
 879   static fstring last_key = "";
 880   static pstring last_value = "";
 881
 882   char *nis_map = (char *)lp_nis_home_map_name();
 883
 884   char buffer[NIS_MAXATTRVAL + 1];
 885   nis_result *result;
 886   nis_object *object;
 887   entry_obj  *entry;
 888
 889   if (strcmp(user_name, last_key))
 890   {
 891     slprintf(buffer, sizeof(buffer)-1, "[key=%s],%s", user_name, nis_map);
 892     DEBUG(5, ("NIS+ querystring: %s\n", buffer));
 893
 894     if (result = nis_list(buffer, FOLLOW_PATH|EXPAND_NAME|HARD_LOOKUP, NULL, NULL))
 895     {
 896        if (result->status != NIS_SUCCESS)
 897       {
 898         DEBUG(3, ("NIS+ query failed: %s\n", nis_sperrno(result->status)));
 899         fstrcpy(last_key, ""); pstrcpy(last_value, "");
 900       }
 901       else
 902       {
 903         object = result->objects.objects_val;
 904         if (object->zo_data.zo_type == ENTRY_OBJ)
 905         {
 906            entry = &object->zo_data.objdata_u.en_data;
 907            DEBUG(5, ("NIS+ entry type: %s\n", entry->en_type));
 908            DEBUG(3, ("NIS+ result: %s\n", entry->en_cols.en_cols_val[1].ec_value.ec_value_val));
 909
 910            pstrcpy(last_value, entry->en_cols.en_cols_val[1].ec_value.ec_value_val);
 911            pstring_sub(last_value, "&", user_name);
 912            fstrcpy(last_key, user_name);
 913         }
 914       }
 915     }
 916     nis_freeresult(result);
 917   }
 918
 919   strip_mount_options(&last_value);
 920
 921   DEBUG(4, ("NIS+ Lookup: %s resulted in %s\n", user_name, last_value));
 922   return last_value;
 923 }
 924 #else /* WITH_NISPLUS_HOME */
 925 char *automount_lookup(char *user_name)
 926 {
 927   static fstring last_key = "";
 928   static pstring last_value = "";
 929
 930   int nis_error;        /* returned by yp all functions */
 931   char *nis_result;     /* yp_match inits this */
 932   int nis_result_len;  /* and set this */
 933   char *nis_domain;     /* yp_get_default_domain inits this */
 934   char *nis_map = (char *)lp_nis_home_map_name();
 935
 936   if ((nis_error = yp_get_default_domain(&nis_domain)) != 0) {
 937     DEBUG(3, ("YP Error: %s\n", yperr_string(nis_error)));
 938     return last_value;
 939   }
 940
 941   DEBUG(5, ("NIS Domain: %s\n", nis_domain));
 942
 943   if (!strcmp(user_name, last_key)) {
 944         nis_result = last_value;
 945     nis_result_len = strlen(last_value);
 946     nis_error = 0;
 947
 948   } else {
 949
 950     if ((nis_error = yp_match(nis_domain, nis_map,
 951                               user_name, strlen(user_name),
 952                               &nis_result, &nis_result_len)) == 0) {
 953        if (!nis_error && nis_result_len >= sizeof(pstring)) {
 954                nis_result_len = sizeof(pstring)-1;
 955        }
 956        fstrcpy(last_key, user_name);
 957        strncpy(last_value, nis_result, nis_result_len);
 958        last_value[nis_result_len] = '\0';
 959         strip_mount_options(&last_value);
 960
 961     } else if(nis_error == YPERR_KEY) {
 962
 963     /* If Key lookup fails user home server is not in nis_map
 964        use default information for server, and home directory */
 965        last_value[0] = 0;
 966        DEBUG(3, ("YP Key not found:  while looking up \"%s\" in map \"%s\"\n",
 967                 user_name, nis_map));
 968        DEBUG(3, ("using defaults for server and home directory\n"));
 969     } else {
 970        DEBUG(3, ("YP Error: \"%s\" while looking up \"%s\" in map \"%s\"\n",
 971                yperr_string(nis_error), user_name, nis_map));
 972     }
 973   }
 974
 975
 976   DEBUG(4, ("YP Lookup: %s resulted in %s\n", user_name, last_value));
 977   return last_value;
 978 }
 979 #endif /* WITH_NISPLUS_HOME */
 980 #endif
 981
 982
 983 /*******************************************************************
 984 are two IPs on the same subnet?
 985 ********************************************************************/
 986 BOOL same_net(struct in_addr ip1,struct in_addr ip2,struct in_addr mask)
 987 {
 988   uint32 net1,net2,nmask;
 989
 990   nmask = ntohl(mask.s_addr);
 991   net1  = ntohl(ip1.s_addr);
 992   net2  = ntohl(ip2.s_addr);
 993
 994   return((net1 & nmask) == (net2 & nmask));
 995 }
 996
 997
 998 /****************************************************************************
 999 a wrapper for gethostbyname() that tries with all lower and all upper case
1000 if the initial name fails
1001 ****************************************************************************/
1002 struct hostent *Get_Hostbyname(const char *name)
1003 {
1004   char *name2 = strdup(name);
1005   struct hostent *ret;
1006
1007   if (!name2)
1008     {
1009       DEBUG(0,("Memory allocation error in Get_Hostbyname! panic\n"));
1010       exit(0);
1011     }
1012
1013
1014   /*
1015    * This next test is redundent and causes some systems (with
1016    * broken isalnum() calls) problems.
1017    * JRA.
1018    */
1019
1020 #if 0
1021   if (!isalnum(*name2))
1022     {
1023       free(name2);
1024       return(NULL);
1025     }
1026 #endif /* 0 */
1027
1028   ret = sys_gethostbyname(name2);
1029   if (ret != NULL)
1030     {
1031       free(name2);
1032       return(ret);
1033     }
1034
1035   /* try with all lowercase */
1036   strlower(name2);
1037   ret = sys_gethostbyname(name2);
1038   if (ret != NULL)
1039     {
1040       free(name2);
1041       return(ret);
1042     }
1043
1044   /* try with all uppercase */
1045   strupper(name2);
1046   ret = sys_gethostbyname(name2);
1047   if (ret != NULL)
1048     {
1049       free(name2);
1050       return(ret);
1051     }
1052
1053   /* nothing works :-( */
1054   free(name2);
1055   return(NULL);
1056 }
1057
1058
1059 /****************************************************************************
1060 check if a process exists. Does this work on all unixes?
1061 ****************************************************************************/
1062
1063 BOOL process_exists(pid_t pid)
1064 {
1065         return(kill(pid,0) == 0 || errno != ESRCH);
1066 }
1067
1068
1069 /*******************************************************************
1070  Convert a uid into a user name.
1071 ********************************************************************/
1072
1073 char *uidtoname(uid_t uid)
1074 {
1075         static fstring name;
1076         struct passwd *pass;
1077
1078         if (winbind_uidtoname(name, uid))
1079                 return name;
1080
1081         pass = sys_getpwuid(uid);
1082         if (pass) return(pass->pw_name);
1083         slprintf(name, sizeof(name) - 1, "%d",(int)uid);
1084         return(name);
1085 }
1086
1087
1088 /*******************************************************************
1089  Convert a gid into a group name.
1090 ********************************************************************/
1091
1092 char *gidtoname(gid_t gid)
1093 {
1094         static fstring name;
1095         struct group *grp;
1096
1097         if (winbind_gidtoname(name, gid))
1098                 return name;
1099
1100         grp = getgrgid(gid);
1101         if (grp) return(grp->gr_name);
1102         slprintf(name,sizeof(name) - 1, "%d",(int)gid);
1103         return(name);
1104 }
1105
1106 /*******************************************************************
1107  Convert a user name into a uid. If winbindd is present uses this.
1108 ********************************************************************/
1109
1110 uid_t nametouid(char *name)
1111 {
1112         struct passwd *pass;
1113         char *p;
1114         uid_t u;
1115
1116         u = (uid_t)strtol(name, &p, 0);
1117         if (p != name) return u;
1118
1119         if (winbind_nametouid(&u, name))
1120                 return u;
1121
1122         pass = sys_getpwnam(name);
1123         if (pass) return(pass->pw_uid);
1124         return (uid_t)-1;
1125 }
1126
1127 /*******************************************************************
1128  Convert a name to a gid_t if possible. Return -1 if not a group. If winbindd
1129  is present does a shortcut lookup...
1130 ********************************************************************/
1131
1132 gid_t nametogid(char *name)
1133 {
1134         struct group *grp;
1135         char *p;
1136         gid_t g;
1137
1138         g = (gid_t)strtol(name, &p, 0);
1139         if (p != name) return g;
1140
1141         if (winbind_nametogid(&g, name))
1142                 return g;
1143
1144         grp = getgrnam(name);
1145         if (grp) return(grp->gr_gid);
1146         return (gid_t)-1;
1147 }
1148
1149 /*******************************************************************
1150 something really nasty happened - panic!
1151 ********************************************************************/
1152 void smb_panic(char *why)
1153 {
1154         char *cmd = lp_panic_action();
1155         if (cmd && *cmd) {
1156                 system(cmd);
1157         }
1158         DEBUG(0,("PANIC: %s\n", why));
1159         dbgflush();
1160         abort();
1161 }
1162
1163
1164 /*******************************************************************
1165 a readdir wrapper which just returns the file name
1166 ********************************************************************/
1167 char *readdirname(DIR *p)
1168 {
1169         SMB_STRUCT_DIRENT *ptr;
1170         char *dname;
1171
1172         if (!p) return(NULL);
1173
1174         ptr = (SMB_STRUCT_DIRENT *)sys_readdir(p);
1175         if (!ptr) return(NULL);
1176
1177         dname = ptr->d_name;
1178
1179 #ifdef NEXT2
1180         if (telldir(p) < 0) return(NULL);
1181 #endif
1182
1183 #ifdef HAVE_BROKEN_READDIR
1184         /* using /usr/ucb/cc is BAD */
1185         dname = dname - 2;
1186 #endif
1187
1188         {
1189                 static pstring buf;
1190                 memcpy(buf, dname, NAMLEN(ptr)+1);
1191                 dname = buf;
1192         }
1193
1194         return(dname);
1195 }
1196
1197 /*******************************************************************
1198  Utility function used to decide if the last component
1199  of a path matches a (possibly wildcarded) entry in a namelist.
1200 ********************************************************************/
1201
1202 BOOL is_in_path(char *name, name_compare_entry *namelist)
1203 {
1204   pstring last_component;
1205   char *p;
1206
1207   DEBUG(8, ("is_in_path: %s\n", name));
1208
1209   /* if we have no list it's obviously not in the path */
1210   if((namelist == NULL ) || ((namelist != NULL) && (namelist[0].name == NULL)))
1211   {
1212     DEBUG(8,("is_in_path: no name list.\n"));
1213     return False;
1214   }
1215
1216   /* Get the last component of the unix name. */
1217   p = strrchr(name, '/');
1218   strncpy(last_component, p ? ++p : name, sizeof(last_component)-1);
1219   last_component[sizeof(last_component)-1] = '\0';
1220
1221   for(; namelist->name != NULL; namelist++)
1222   {
1223     if(namelist->is_wild)
1224     {
1225       if (mask_match(last_component, namelist->name, case_sensitive))
1226       {
1227          DEBUG(8,("is_in_path: mask match succeeded\n"));
1228          return True;
1229       }
1230     }
1231     else
1232     {
1233       if((case_sensitive && (strcmp(last_component, namelist->name) == 0))||
1234        (!case_sensitive && (StrCaseCmp(last_component, namelist->name) == 0)))
1235         {
1236          DEBUG(8,("is_in_path: match succeeded\n"));
1237          return True;
1238         }
1239     }
1240   }
1241   DEBUG(8,("is_in_path: match not found\n"));
1242
1243   return False;
1244 }
1245
1246 /*******************************************************************
1247  Strip a '/' separated list into an array of
1248  name_compare_enties structures suitable for
1249  passing to is_in_path(). We do this for
1250  speed so we can pre-parse all the names in the list
1251  and don't do it for each call to is_in_path().
1252  namelist is modified here and is assumed to be
1253  a copy owned by the caller.
1254  We also check if the entry contains a wildcard to
1255  remove a potentially expensive call to mask_match
1256  if possible.
1257 ********************************************************************/
1258
1259 void set_namearray(name_compare_entry **ppname_array, char *namelist)
1260 {
1261   char *name_end;
1262   char *nameptr = namelist;
1263   int num_entries = 0;
1264   int i;
1265
1266   (*ppname_array) = NULL;
1267
1268   if((nameptr == NULL ) || ((nameptr != NULL) && (*nameptr == '\0')))
1269     return;
1270
1271   /* We need to make two passes over the string. The
1272      first to count the number of elements, the second
1273      to split it.
1274    */
1275   while(*nameptr)
1276     {
1277       if ( *nameptr == '/' )
1278         {
1279           /* cope with multiple (useless) /s) */
1280           nameptr++;
1281           continue;
1282         }
1283       /* find the next / */
1284       name_end = strchr(nameptr, '/');
1285
1286       /* oops - the last check for a / didn't find one. */
1287       if (name_end == NULL)
1288         break;
1289
1290       /* next segment please */
1291       nameptr = name_end + 1;
1292       num_entries++;
1293     }
1294
1295   if(num_entries == 0)
1296     return;
1297
1298   if(( (*ppname_array) = (name_compare_entry *)malloc(
1299            (num_entries + 1) * sizeof(name_compare_entry))) == NULL)
1300         {
1301     DEBUG(0,("set_namearray: malloc fail\n"));
1302     return;
1303         }
1304
1305   /* Now copy out the names */
1306   nameptr = namelist;
1307   i = 0;
1308   while(*nameptr)
1309              {
1310       if ( *nameptr == '/' )
1311       {
1312           /* cope with multiple (useless) /s) */
1313           nameptr++;
1314           continue;
1315       }
1316       /* find the next / */
1317       if ((name_end = strchr(nameptr, '/')) != NULL)
1318       {
1319           *name_end = 0;
1320          }
1321
1322       /* oops - the last check for a / didn't find one. */
1323       if(name_end == NULL)
1324         break;
1325
1326       (*ppname_array)[i].is_wild = ms_has_wild(nameptr);
1327       if(((*ppname_array)[i].name = strdup(nameptr)) == NULL)
1328       {
1329         DEBUG(0,("set_namearray: malloc fail (1)\n"));
1330         return;
1331       }
1332
1333       /* next segment please */
1334       nameptr = name_end + 1;
1335       i++;
1336     }
1337
1338   (*ppname_array)[i].name = NULL;
1339
1340   return;
1341 }
1342
1343 /****************************************************************************
1344 routine to free a namearray.
1345 ****************************************************************************/
1346
1347 void free_namearray(name_compare_entry *name_array)
1348 {
1349   if(name_array == 0)
1350     return;
1351
1352   if(name_array->name != NULL)
1353     free(name_array->name);
1354
1355   free((char *)name_array);
1356 }
1357
1358 /****************************************************************************
1359  Simple routine to do POSIX file locking. Cruft in NFS and 64->32 bit mapping
1360  is dealt with in posix.c
1361 ****************************************************************************/
1362
1363 BOOL fcntl_lock(int fd, int op, SMB_OFF_T offset, SMB_OFF_T count, int type)
1364 {
1365   SMB_STRUCT_FLOCK lock;
1366   int ret;
1367
1368   DEBUG(8,("fcntl_lock %d %d %.0f %.0f %d\n",fd,op,(double)offset,(double)count,type));
1369
1370   lock.l_type = type;
1371   lock.l_whence = SEEK_SET;
1372   lock.l_start = offset;
1373   lock.l_len = count;
1374   lock.l_pid = 0;
1375
1376   errno = 0;
1377
1378   ret = fcntl(fd,op,&lock);
1379
1380   if (errno != 0)
1381     DEBUG(3,("fcntl_lock: fcntl lock gave errno %d (%s)\n",errno,strerror(errno)));
1382
1383   /* a lock query */
1384   if (op == SMB_F_GETLK)
1385   {
1386     if ((ret != -1) &&
1387         (lock.l_type != F_UNLCK) &&
1388         (lock.l_pid != 0) &&
1389         (lock.l_pid != sys_getpid()))
1390     {
1391       DEBUG(3,("fcntl_lock: fd %d is locked by pid %d\n",fd,(int)lock.l_pid));
1392       return(True);
1393     }
1394
1395     /* it must be not locked or locked by me */
1396     return(False);
1397   }
1398
1399   /* a lock set or unset */
1400   if (ret == -1)
1401   {
1402     DEBUG(3,("fcntl_lock: lock failed at offset %.0f count %.0f op %d type %d (%s)\n",
1403           (double)offset,(double)count,op,type,strerror(errno)));
1404     return(False);
1405   }
1406
1407   /* everything went OK */
1408   DEBUG(8,("fcntl_lock: Lock call successful\n"));
1409
1410   return(True);
1411 }
1412
1413 /*******************************************************************
1414 is the name specified one of my netbios names
1415 returns true is it is equal, false otherwise
1416 ********************************************************************/
1417 BOOL is_myname(char *s)
1418 {
1419   int n;
1420   BOOL ret = False;
1421
1422   for (n=0; my_netbios_names[n]; n++) {
1423     if (strequal(my_netbios_names[n], s))
1424       ret=True;
1425   }
1426   DEBUG(8, ("is_myname(\"%s\") returns %d\n", s, ret));
1427   return(ret);
1428 }
1429
1430 /*******************************************************************
1431 set the horrid remote_arch string based on an enum.
1432 ********************************************************************/
1433 void set_remote_arch(enum remote_arch_types type)
1434 {
1435   extern fstring remote_arch;
1436   ra_type = type;
1437   switch( type )
1438   {
1439   case RA_WFWG:
1440     fstrcpy(remote_arch, "WfWg");
1441     return;
1442   case RA_OS2:
1443     fstrcpy(remote_arch, "OS2");
1444     return;
1445   case RA_WIN95:
1446     fstrcpy(remote_arch, "Win95");
1447     return;
1448   case RA_WINNT:
1449     fstrcpy(remote_arch, "WinNT");
1450     return;
1451   case RA_WIN2K:
1452     fstrcpy(remote_arch, "Win2K");
1453     return;
1454   case RA_SAMBA:
1455     fstrcpy(remote_arch,"Samba");
1456     return;
1457   default:
1458     ra_type = RA_UNKNOWN;
1459     fstrcpy(remote_arch, "UNKNOWN");
1460     break;
1461   }
1462 }
1463
1464 /*******************************************************************
1465  Get the remote_arch type.
1466 ********************************************************************/
1467 enum remote_arch_types get_remote_arch(void)
1468 {
1469   return ra_type;
1470 }
1471
1472
1473 void out_ascii(FILE *f, unsigned char *buf,int len)
1474 {
1475         int i;
1476         for (i=0;i<len;i++)
1477         {
1478                 fprintf(f, "%c", isprint(buf[i])?buf[i]:'.');
1479         }
1480 }
1481
1482 void out_data(FILE *f,char *buf1,int len, int per_line)
1483 {
1484         unsigned char *buf = (unsigned char *)buf1;
1485         int i=0;
1486         if (len<=0)
1487         {
1488                 return;
1489         }
1490
1491         fprintf(f, "[%03X] ",i);
1492         for (i=0;i<len;)
1493         {
1494                 fprintf(f, "%02X ",(int)buf[i]);
1495                 i++;
1496                 if (i%(per_line/2) == 0) fprintf(f, " ");
1497                 if (i%per_line == 0)
1498                 {
1499                         out_ascii(f,&buf[i-per_line  ],per_line/2); fprintf(f, " ");
1500                         out_ascii(f,&buf[i-per_line/2],per_line/2); fprintf(f, "\n");
1501                         if (i<len) fprintf(f, "[%03X] ",i);
1502                 }
1503         }
1504         if ((i%per_line) != 0)
1505         {
1506                 int n;
1507
1508                 n = per_line - (i%per_line);
1509                 fprintf(f, " ");
1510                 if (n>(per_line/2)) fprintf(f, " ");
1511                 while (n--)
1512                 {
1513                         fprintf(f, "   ");
1514                 }
1515                 n = MIN(per_line/2,i%per_line);
1516                 out_ascii(f,&buf[i-(i%per_line)],n); fprintf(f, " ");
1517                 n = (i%per_line) - n;
1518                 if (n>0) out_ascii(f,&buf[i-n],n);
1519                 fprintf(f, "\n");
1520         }
1521 }
1522
1523 void print_asc(int level, unsigned char *buf,int len)
1524 {
1525         int i;
1526         for (i=0;i<len;i++)
1527                 DEBUG(level,("%c", isprint(buf[i])?buf[i]:'.'));
1528 }
1529
1530 void dump_data(int level,char *buf1,int len)
1531 {
1532   unsigned char *buf = (unsigned char *)buf1;
1533   int i=0;
1534   if (len<=0) return;
1535
1536   DEBUG(level,("[%03X] ",i));
1537   for (i=0;i<len;) {
1538     DEBUG(level,("%02X ",(int)buf[i]));
1539     i++;
1540     if (i%8 == 0) DEBUG(level,(" "));
1541     if (i%16 == 0) {
1542       print_asc(level,&buf[i-16],8); DEBUG(level,(" "));
1543       print_asc(level,&buf[i-8],8); DEBUG(level,("\n"));
1544       if (i<len) DEBUG(level,("[%03X] ",i));
1545     }
1546   }
1547   if (i%16) {
1548     int n;
1549
1550     n = 16 - (i%16);
1551     DEBUG(level,(" "));
1552     if (n>8) DEBUG(level,(" "));
1553     while (n--) DEBUG(level,("   "));
1554
1555     n = MIN(8,i%16);
1556     print_asc(level,&buf[i-(i%16)],n); DEBUG(level,(" "));
1557     n = (i%16) - n;
1558     if (n>0) print_asc(level,&buf[i-n],n);
1559     DEBUG(level,("\n"));
1560   }
1561 }
1562
1563 char *tab_depth(int depth)
1564 {
1565         static pstring spaces;
1566         memset(spaces, ' ', depth * 4);
1567         spaces[depth * 4] = 0;
1568         return spaces;
1569 }
1570
1571 /*****************************************************************************
1572  * Provide a checksum on a string
1573  *
1574  *  Input:  s - the null-terminated character string for which the checksum
1575  *              will be calculated.
1576  *
1577  *  Output: The checksum value calculated for s.
1578  *
1579  * ****************************************************************************
1580  */
1581 int str_checksum(const char *s)
1582 {
1583         int res = 0;
1584         int c;
1585         int i=0;
1586
1587         while(*s) {
1588                 c = *s;
1589                 res ^= (c << (i % 15)) ^ (c >> (15-(i%15)));
1590                 s++;
1591                 i++;
1592         }
1593         return(res);
1594 } /* str_checksum */
1595
1596
1597
1598 /*****************************************************************
1599 zero a memory area then free it. Used to catch bugs faster
1600 *****************************************************************/
1601 void zero_free(void *p, size_t size)
1602 {
1603         memset(p, 0, size);
1604         free(p);
1605 }
1606
1607
1608 /*****************************************************************
1609 set our open file limit to a requested max and return the limit
1610 *****************************************************************/
1611 int set_maxfiles(int requested_max)
1612 {
1613 #if (defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE))
1614         struct rlimit rlp;
1615         int saved_current_limit;
1616
1617         if(getrlimit(RLIMIT_NOFILE, &rlp)) {
1618                 DEBUG(0,("set_maxfiles: getrlimit (1) for RLIMIT_NOFILE failed with error %s\n",
1619                         strerror(errno) ));
1620                 /* just guess... */
1621                 return requested_max;
1622         }
1623
1624         /*
1625      * Set the fd limit to be real_max_open_files + MAX_OPEN_FUDGEFACTOR to
1626          * account for the extra fd we need
1627          * as well as the log files and standard
1628          * handles etc. Save the limit we want to set in case
1629          * we are running on an OS that doesn't support this limit (AIX)
1630          * which always returns RLIM_INFINITY for rlp.rlim_max.
1631          */
1632
1633         /* Try raising the hard (max) limit to the requested amount. */
1634
1635 #if defined(RLIM_INFINITY)
1636         if (rlp.rlim_max != RLIM_INFINITY) {
1637                 int orig_max = rlp.rlim_max;
1638
1639                 if ( rlp.rlim_max < requested_max )
1640                         rlp.rlim_max = requested_max;
1641
1642                 /* This failing is not an error - many systems (Linux) don't
1643                         support our default request of 10,000 open files. JRA. */
1644
1645                 if(setrlimit(RLIMIT_NOFILE, &rlp)) {
1646                         DEBUG(3,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d max files failed with error %s\n",
1647                                 (int)rlp.rlim_max, strerror(errno) ));
1648
1649                         /* Set failed - restore original value from get. */
1650                         rlp.rlim_max = orig_max;
1651                 }
1652         }
1653 #endif
1654
1655         /* Now try setting the soft (current) limit. */
1656
1657         saved_current_limit = rlp.rlim_cur = MIN(requested_max,rlp.rlim_max);
1658
1659         if(setrlimit(RLIMIT_NOFILE, &rlp)) {
1660                 DEBUG(0,("set_maxfiles: setrlimit for RLIMIT_NOFILE for %d files failed with error %s\n",
1661                         (int)rlp.rlim_cur, strerror(errno) ));
1662                 /* just guess... */
1663                 return saved_current_limit;
1664         }
1665
1666         if(getrlimit(RLIMIT_NOFILE, &rlp)) {
1667                 DEBUG(0,("set_maxfiles: getrlimit (2) for RLIMIT_NOFILE failed with error %s\n",
1668                         strerror(errno) ));
1669                 /* just guess... */
1670                 return saved_current_limit;
1671     }
1672
1673 #if defined(RLIM_INFINITY)
1674         if(rlp.rlim_cur == RLIM_INFINITY)
1675                 return saved_current_limit;
1676 #endif
1677
1678     if((int)rlp.rlim_cur > saved_current_limit)
1679                 return saved_current_limit;
1680
1681         return rlp.rlim_cur;
1682 #else /* !defined(HAVE_GETRLIMIT) || !defined(RLIMIT_NOFILE) */
1683         /*
1684          * No way to know - just guess...
1685          */
1686         return requested_max;
1687 #endif
1688 }
1689
1690 /*****************************************************************
1691  splits out the start of the key (HKLM or HKU) and the rest of the key
1692  *****************************************************************/
1693 BOOL reg_split_key(char *full_keyname, uint32 *reg_type, char *key_name)
1694 {
1695         pstring tmp;
1696
1697         if (!next_token(&full_keyname, tmp, "\\", sizeof(tmp)))
1698         {
1699                 return False;
1700         }
1701
1702         (*reg_type) = 0;
1703
1704         DEBUG(10, ("reg_split_key: hive %s\n", tmp));
1705
1706         if (strequal(tmp, "HKLM") || strequal(tmp, "HKEY_LOCAL_MACHINE"))
1707         {
1708                 (*reg_type) = HKEY_LOCAL_MACHINE;
1709         }
1710         else if (strequal(tmp, "HKU") || strequal(tmp, "HKEY_USERS"))
1711         {
1712                 (*reg_type) = HKEY_USERS;
1713         }
1714         else
1715         {
1716                 DEBUG(10,("reg_split_key: unrecognised hive key %s\n", tmp));
1717                 return False;
1718         }
1719
1720         if (next_token(NULL, tmp, "\n\r", sizeof(tmp)))
1721         {
1722                 fstrcpy(key_name, tmp);
1723         }
1724         else
1725         {
1726                 key_name[0] = 0;
1727         }
1728
1729         DEBUG(10, ("reg_split_key: name %s\n", key_name));
1730
1731         return True;
1732 }
1733
1734
1735 /*****************************************************************
1736 possibly replace mkstemp if it is broken
1737 *****************************************************************/
1738 int smb_mkstemp(char *template)
1739 {
1740 #if HAVE_SECURE_MKSTEMP
1741         return mkstemp(template);
1742 #else
1743         /* have a reasonable go at emulating it. Hope that
1744            the system mktemp() isn't completly hopeless */
1745         char *p = mktemp(template);
1746         if (!p) return -1;
1747         return open(p, O_CREAT|O_EXCL|O_RDWR, 0600);
1748 #endif
1749 }
1750
1751 /*****************************************************************
1752 like strdup but for memory
1753  *****************************************************************/
1754 void *memdup(void *p, size_t size)
1755 {
1756         void *p2;
1757         if (size == 0) return NULL;
1758         p2 = malloc(size);
1759         if (!p2) return NULL;
1760         memcpy(p2, p, size);
1761         return p2;
1762 }
1763
1764 /*****************************************************************
1765 get local hostname and cache result
1766  *****************************************************************/
1767 char *myhostname(void)
1768 {
1769         static pstring ret;
1770         if (ret[0] == 0) {
1771                 get_myname(ret);
1772         }
1773         return ret;
1774 }
1775
1776
1777 /*****************************************************************
1778 a useful function for returning a path in the Samba lock directory
1779  *****************************************************************/
1780 char *lock_path(char *name)
1781 {
1782         static pstring fname;
1783
1784         pstrcpy(fname,lp_lockdir());
1785         trim_string(fname,"","/");
1786
1787         if (!directory_exist(fname,NULL)) {
1788                 mkdir(fname,0755);
1789         }
1790
1791         pstrcat(fname,"/");
1792         pstrcat(fname,name);
1793
1794         return fname;
1795 }
1796
1797 /*******************************************************************
1798  Given a filename - get its directory name
1799  NB: Returned in static storage.  Caveats:
1800  o  Not safe in thread environment.
1801  o  Caller must not free.
1802  o  If caller wishes to preserve, they should copy.
1803 ********************************************************************/
1804
1805 char *parent_dirname(const char *path)
1806 {
1807         static pstring dirpath;
1808         char *p;
1809
1810         if (!path)
1811                 return(NULL);
1812
1813         pstrcpy(dirpath, path);
1814         p = strrchr(dirpath, '/');  /* Find final '/', if any */
1815         if (!p) {
1816                 pstrcpy(dirpath, ".");    /* No final "/", so dir is "." */
1817         } else {
1818                 if (p == dirpath)
1819                         ++p;    /* For root "/", leave "/" in place */
1820                 *p = '\0';
1821         }
1822         return dirpath;
1823 }
1824
1825
1826 /*******************************************************************
1827 determine if a pattern contains any Microsoft wildcard characters
1828  *******************************************************************/
1829 BOOL ms_has_wild(char *s)
1830 {
1831         char c;
1832         while ((c = *s++)) {
1833                 switch (c) {
1834                 case '*':
1835                 case '?':
1836                 case '<':
1837                 case '>':
1838                 case '"':
1839                         return True;
1840                 }
1841         }
1842         return False;
1843 }
1844
1845 /*******************************************************************
1846  a wrapper that handles case sensitivity and the special handling
1847    of the ".." name
1848  *******************************************************************/
1849 BOOL mask_match(char *string, char *pattern, BOOL is_case_sensitive)
1850 {
1851         fstring p2, s2;
1852         if (strcmp(string,"..") == 0) string = ".";
1853         if (strcmp(pattern,".") == 0) return False;
1854
1855         if (is_case_sensitive) {
1856                 return ms_fnmatch(pattern, string) == 0;
1857         }
1858
1859         fstrcpy(p2, pattern);
1860         fstrcpy(s2, string);
1861         strlower(p2);
1862         strlower(s2);
1863         return ms_fnmatch(p2, s2) == 0;
1864 }
1865
1866
1867
1868 #ifdef __INSURE__
1869
1870 /*******************************************************************
1871 This routine is a trick to immediately catch errors when debugging
1872 with insure. A xterm with a gdb is popped up when insure catches
1873 a error. It is Linux specific.
1874 ********************************************************************/
1875 int _Insure_trap_error(int a1, int a2, int a3, int a4, int a5, int a6)
1876 {
1877         static int (*fn)();
1878         int ret;
1879         char pidstr[10];
1880         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'";
1881
1882         slprintf(pidstr, sizeof(pidstr)-1, "%d", sys_getpid());
1883         pstring_sub(cmd, "%d", pidstr);
1884
1885         if (!fn) {
1886                 static void *h;
1887                 h = dlopen("/usr/local/parasoft/insure++lite/lib.linux2/libinsure.so", RTLD_LAZY);
1888                 fn = dlsym(h, "_Insure_trap_error");
1889         }
1890
1891         ret = fn(a1, a2, a3, a4, a5, a6);
1892
1893         system(cmd);
1894
1895         return ret;
1896 }
1897 #endif