lib/replace/replace.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    replacement routines for broken systems
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Jelmer Vernooij 2005-2008
   6    Copyright (C) Matthieu Patou  2010
   7
   8      ** NOTE! The following LGPL license applies to the replace
   9      ** library. This does NOT imply that all of Samba is released
  10      ** under the LGPL
  11
  12    This library is free software; you can redistribute it and/or
  13    modify it under the terms of the GNU Lesser General Public
  14    License as published by the Free Software Foundation; either
  15    version 3 of the License, or (at your option) any later version.
  16
  17    This library is distributed in the hope that it will be useful,
  18    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20    Lesser General Public License for more details.
  21
  22    You should have received a copy of the GNU Lesser General Public
  23    License along with this library; if not, see <http://www.gnu.org/licenses/>.
  24 */
  25
  26 #include "replace.h"
  27
  28 #include "system/filesys.h"
  29 #include "system/time.h"
  30 #include "system/network.h"
  31 #include "system/passwd.h"
  32 #include "system/syslog.h"
  33 #include "system/locale.h"
  34 #include "system/wait.h"
  35
  36 #ifdef _WIN32
  37 #define mkdir(d,m) _mkdir(d)
  38 #endif
  39
  40 void replace_dummy(void);
  41 void replace_dummy(void) {}
  42
  43 #ifndef HAVE_FTRUNCATE
  44  /*******************************************************************
  45 ftruncate for operating systems that don't have it
  46 ********************************************************************/
  47 int rep_ftruncate(int f, off_t l)
  48 {
  49 #ifdef HAVE_CHSIZE
  50       return chsize(f,l);
  51 #elif defined(F_FREESP)
  52       struct  flock   fl;
  53
  54       fl.l_whence = 0;
  55       fl.l_len = 0;
  56       fl.l_start = l;
  57       fl.l_type = F_WRLCK;
  58       return fcntl(f, F_FREESP, &fl);
  59 #else
  60 #error "you must have a ftruncate function"
  61 #endif
  62 }
  63 #endif /* HAVE_FTRUNCATE */
  64
  65
  66 #ifndef HAVE_STRLCPY
  67 /*
  68  * Like strncpy but does not 0 fill the buffer and always null
  69  * terminates. bufsize is the size of the destination buffer.
  70  * Returns the length of s.
  71  */
  72 size_t rep_strlcpy(char *d, const char *s, size_t bufsize)
  73 {
  74         size_t len = strlen(s);
  75         size_t ret = len;
  76
  77         if (bufsize <= 0) {
  78                 return 0;
  79         }
  80         if (len >= bufsize) {
  81                 len = bufsize - 1;
  82         }
  83         memcpy(d, s, len);
  84         d[len] = 0;
  85         return ret;
  86 }
  87 #endif
  88
  89 #ifndef HAVE_STRLCAT
  90 /* like strncat but does not 0 fill the buffer and always null
  91    terminates. bufsize is the length of the buffer, which should
  92    be one more than the maximum resulting string length */
  93 size_t rep_strlcat(char *d, const char *s, size_t bufsize)
  94 {
  95         size_t len1 = strnlen(d, bufsize);
  96         size_t len2 = strlen(s);
  97         size_t ret = len1 + len2;
  98
  99         if (len1+len2 >= bufsize) {
 100                 if (bufsize < (len1+1)) {
 101                         return ret;
 102                 }
 103                 len2 = bufsize - (len1+1);
 104         }
 105         if (len2 > 0) {
 106                 memcpy(d+len1, s, len2);
 107                 d[len1+len2] = 0;
 108         }
 109         return ret;
 110 }
 111 #endif
 112
 113 #ifndef HAVE_MKTIME
 114 /*******************************************************************
 115 a mktime() replacement for those who don't have it - contributed by
 116 C.A. Lademann <cal@zls.com>
 117 Corrections by richard.kettlewell@kewill.com
 118 ********************************************************************/
 119
 120 #define  MINUTE  60
 121 #define  HOUR    60*MINUTE
 122 #define  DAY             24*HOUR
 123 #define  YEAR    365*DAY
 124 time_t rep_mktime(struct tm *t)
 125 {
 126   struct tm       *u;
 127   time_t  epoch = 0;
 128   int n;
 129   int             mon [] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
 130   y, m, i;
 131
 132   if(t->tm_year < 70)
 133     return((time_t)-1);
 134
 135   n = t->tm_year + 1900 - 1;
 136   epoch = (t->tm_year - 70) * YEAR +
 137     ((n / 4 - n / 100 + n / 400) - (1969 / 4 - 1969 / 100 + 1969 / 400)) * DAY;
 138
 139   y = t->tm_year + 1900;
 140   m = 0;
 141
 142   for(i = 0; i < t->tm_mon; i++) {
 143     epoch += mon [m] * DAY;
 144     if(m == 1 && y % 4 == 0 && (y % 100 != 0 || y % 400 == 0))
 145       epoch += DAY;
 146
 147     if(++m > 11) {
 148       m = 0;
 149       y++;
 150     }
 151   }
 152
 153   epoch += (t->tm_mday - 1) * DAY;
 154   epoch += t->tm_hour * HOUR + t->tm_min * MINUTE + t->tm_sec;
 155
 156   if((u = localtime(&epoch)) != NULL) {
 157     t->tm_sec = u->tm_sec;
 158     t->tm_min = u->tm_min;
 159     t->tm_hour = u->tm_hour;
 160     t->tm_mday = u->tm_mday;
 161     t->tm_mon = u->tm_mon;
 162     t->tm_year = u->tm_year;
 163     t->tm_wday = u->tm_wday;
 164     t->tm_yday = u->tm_yday;
 165     t->tm_isdst = u->tm_isdst;
 166   }
 167
 168   return(epoch);
 169 }
 170 #endif /* !HAVE_MKTIME */
 171
 172
 173 #ifndef HAVE_INITGROUPS
 174 /****************************************************************************
 175  some systems don't have an initgroups call
 176 ****************************************************************************/
 177 int rep_initgroups(char *name, gid_t id)
 178 {
 179 #ifndef HAVE_SETGROUPS
 180         /* yikes! no SETGROUPS or INITGROUPS? how can this work? */
 181         errno = ENOSYS;
 182         return -1;
 183 #else /* HAVE_SETGROUPS */
 184
 185 #include <grp.h>
 186
 187         gid_t *grouplst = NULL;
 188         int max_gr = NGROUPS_MAX;
 189         int ret;
 190         int    i,j;
 191         struct group *g;
 192         char   *gr;
 193
 194         if((grouplst = malloc(sizeof(gid_t) * max_gr)) == NULL) {
 195                 errno = ENOMEM;
 196                 return -1;
 197         }
 198
 199         grouplst[0] = id;
 200         i = 1;
 201         while (i < max_gr && ((g = (struct group *)getgrent()) != (struct group *)NULL)) {
 202                 if (g->gr_gid == id)
 203                         continue;
 204                 j = 0;
 205                 gr = g->gr_mem[0];
 206                 while (gr && (*gr != (char)NULL)) {
 207                         if (strcmp(name,gr) == 0) {
 208                                 grouplst[i] = g->gr_gid;
 209                                 i++;
 210                                 gr = (char *)NULL;
 211                                 break;
 212                         }
 213                         gr = g->gr_mem[++j];
 214                 }
 215         }
 216         endgrent();
 217         ret = setgroups(i, grouplst);
 218         free(grouplst);
 219         return ret;
 220 #endif /* HAVE_SETGROUPS */
 221 }
 222 #endif /* HAVE_INITGROUPS */
 223
 224
 225 #ifndef HAVE_MEMMOVE
 226 /*******************************************************************
 227 safely copies memory, ensuring no overlap problems.
 228 this is only used if the machine does not have its own memmove().
 229 this is not the fastest algorithm in town, but it will do for our
 230 needs.
 231 ********************************************************************/
 232 void *rep_memmove(void *dest,const void *src,int size)
 233 {
 234         unsigned long d,s;
 235         int i;
 236         if (dest==src || !size) return(dest);
 237
 238         d = (unsigned long)dest;
 239         s = (unsigned long)src;
 240
 241         if ((d >= (s+size)) || (s >= (d+size))) {
 242                 /* no overlap */
 243                 memcpy(dest,src,size);
 244                 return(dest);
 245         }
 246
 247         if (d < s) {
 248                 /* we can forward copy */
 249                 if (s-d >= sizeof(int) &&
 250                     !(s%sizeof(int)) &&
 251                     !(d%sizeof(int)) &&
 252                     !(size%sizeof(int))) {
 253                         /* do it all as words */
 254                         int *idest = (int *)dest;
 255                         int *isrc = (int *)src;
 256                         size /= sizeof(int);
 257                         for (i=0;i<size;i++) idest[i] = isrc[i];
 258                 } else {
 259                         /* simplest */
 260                         char *cdest = (char *)dest;
 261                         char *csrc = (char *)src;
 262                         for (i=0;i<size;i++) cdest[i] = csrc[i];
 263                 }
 264         } else {
 265                 /* must backward copy */
 266                 if (d-s >= sizeof(int) &&
 267                     !(s%sizeof(int)) &&
 268                     !(d%sizeof(int)) &&
 269                     !(size%sizeof(int))) {
 270                         /* do it all as words */
 271                         int *idest = (int *)dest;
 272                         int *isrc = (int *)src;
 273                         size /= sizeof(int);
 274                         for (i=size-1;i>=0;i--) idest[i] = isrc[i];
 275                 } else {
 276                         /* simplest */
 277                         char *cdest = (char *)dest;
 278                         char *csrc = (char *)src;
 279                         for (i=size-1;i>=0;i--) cdest[i] = csrc[i];
 280                 }
 281         }
 282         return(dest);
 283 }
 284 #endif /* HAVE_MEMMOVE */
 285
 286 #ifndef HAVE_STRDUP
 287 /****************************************************************************
 288 duplicate a string
 289 ****************************************************************************/
 290 char *rep_strdup(const char *s)
 291 {
 292         size_t len;
 293         char *ret;
 294
 295         if (!s) return(NULL);
 296
 297         len = strlen(s)+1;
 298         ret = (char *)malloc(len);
 299         if (!ret) return(NULL);
 300         memcpy(ret,s,len);
 301         return(ret);
 302 }
 303 #endif /* HAVE_STRDUP */
 304
 305 #ifndef HAVE_SETLINEBUF
 306 void rep_setlinebuf(FILE *stream)
 307 {
 308         setvbuf(stream, (char *)NULL, _IOLBF, 0);
 309 }
 310 #endif /* HAVE_SETLINEBUF */
 311
 312 #ifndef HAVE_VSYSLOG
 313 #ifdef HAVE_SYSLOG
 314 void rep_vsyslog (int facility_priority, const char *format, va_list arglist)
 315 {
 316         char *msg = NULL;
 317         vasprintf(&msg, format, arglist);
 318         if (!msg)
 319                 return;
 320         syslog(facility_priority, "%s", msg);
 321         free(msg);
 322 }
 323 #endif /* HAVE_SYSLOG */
 324 #endif /* HAVE_VSYSLOG */
 325
 326 #ifndef HAVE_STRNLEN
 327 /**
 328  Some platforms don't have strnlen
 329 **/
 330  size_t rep_strnlen(const char *s, size_t max)
 331 {
 332         size_t len;
 333
 334         for (len = 0; len < max; len++) {
 335                 if (s[len] == '\0') {
 336                         break;
 337                 }
 338         }
 339         return len;
 340 }
 341 #endif
 342
 343 #ifndef HAVE_STRNDUP
 344 /**
 345  Some platforms don't have strndup.
 346 **/
 347 char *rep_strndup(const char *s, size_t n)
 348 {
 349         char *ret;
 350
 351         n = strnlen(s, n);
 352         ret = malloc(n+1);
 353         if (!ret)
 354                 return NULL;
 355         memcpy(ret, s, n);
 356         ret[n] = 0;
 357
 358         return ret;
 359 }
 360 #endif
 361
 362 #if !defined(HAVE_WAITPID) && defined(HAVE_WAIT4)
 363 int rep_waitpid(pid_t pid,int *status,int options)
 364 {
 365   return wait4(pid, status, options, NULL);
 366 }
 367 #endif
 368
 369 #ifndef HAVE_SETEUID
 370 int rep_seteuid(uid_t euid)
 371 {
 372 #ifdef HAVE_SETRESUID
 373         return setresuid(-1, euid, -1);
 374 #else
 375         errno = ENOSYS;
 376         return -1;
 377 #endif
 378 }
 379 #endif
 380
 381 #ifndef HAVE_SETEGID
 382 int rep_setegid(gid_t egid)
 383 {
 384 #ifdef HAVE_SETRESGID
 385         return setresgid(-1, egid, -1);
 386 #else
 387         errno = ENOSYS;
 388         return -1;
 389 #endif
 390 }
 391 #endif
 392
 393 /*******************************************************************
 394 os/2 also doesn't have chroot
 395 ********************************************************************/
 396 #ifndef HAVE_CHROOT
 397 int rep_chroot(const char *dname)
 398 {
 399         errno = ENOSYS;
 400         return -1;
 401 }
 402 #endif
 403
 404 /*****************************************************************
 405  Possibly replace mkstemp if it is broken.
 406 *****************************************************************/
 407
 408 #ifndef HAVE_SECURE_MKSTEMP
 409 int rep_mkstemp(char *template)
 410 {
 411         /* have a reasonable go at emulating it. Hope that
 412            the system mktemp() isn't completely hopeless */
 413         mktemp(template);
 414         if (template[0] == 0)
 415                 return -1;
 416         return open(template, O_CREAT|O_EXCL|O_RDWR, 0600);
 417 }
 418 #endif
 419
 420 #ifndef HAVE_MKDTEMP
 421 char *rep_mkdtemp(char *template)
 422 {
 423         char *dname;
 424
 425         if ((dname = mktemp(template))) {
 426                 if (mkdir(dname, 0700) >= 0) {
 427                         return dname;
 428                 }
 429         }
 430
 431         return NULL;
 432 }
 433 #endif
 434
 435 /*****************************************************************
 436  Watch out: this is not thread safe.
 437 *****************************************************************/
 438
 439 #ifndef HAVE_PREAD
 440 ssize_t rep_pread(int __fd, void *__buf, size_t __nbytes, off_t __offset)
 441 {
 442         if (lseek(__fd, __offset, SEEK_SET) != __offset) {
 443                 return -1;
 444         }
 445         return read(__fd, __buf, __nbytes);
 446 }
 447 #endif
 448
 449 /*****************************************************************
 450  Watch out: this is not thread safe.
 451 *****************************************************************/
 452
 453 #ifndef HAVE_PWRITE
 454 ssize_t rep_pwrite(int __fd, const void *__buf, size_t __nbytes, off_t __offset)
 455 {
 456         if (lseek(__fd, __offset, SEEK_SET) != __offset) {
 457                 return -1;
 458         }
 459         return write(__fd, __buf, __nbytes);
 460 }
 461 #endif
 462
 463 #ifndef HAVE_STRCASESTR
 464 char *rep_strcasestr(const char *haystack, const char *needle)
 465 {
 466         const char *s;
 467         size_t nlen = strlen(needle);
 468         for (s=haystack;*s;s++) {
 469                 if (toupper(*needle) == toupper(*s) &&
 470                     strncasecmp(s, needle, nlen) == 0) {
 471                         return (char *)((uintptr_t)s);
 472                 }
 473         }
 474         return NULL;
 475 }
 476 #endif
 477
 478 #ifndef HAVE_STRTOK_R
 479 /* based on GLIBC version, copyright Free Software Foundation */
 480 char *rep_strtok_r(char *s, const char *delim, char **save_ptr)
 481 {
 482         char *token;
 483
 484         if (s == NULL) s = *save_ptr;
 485
 486         s += strspn(s, delim);
 487         if (*s == '\0') {
 488                 *save_ptr = s;
 489                 return NULL;
 490         }
 491
 492         token = s;
 493         s = strpbrk(token, delim);
 494         if (s == NULL) {
 495                 *save_ptr = token + strlen(token);
 496         } else {
 497                 *s = '\0';
 498                 *save_ptr = s + 1;
 499         }
 500
 501         return token;
 502 }
 503 #endif
 504
 505
 506 #ifndef HAVE_STRTOLL
 507 long long int rep_strtoll(const char *str, char **endptr, int base)
 508 {
 509 #ifdef HAVE_STRTOQ
 510         return strtoq(str, endptr, base);
 511 #elif defined(HAVE___STRTOLL)
 512         return __strtoll(str, endptr, base);
 513 #elif SIZEOF_LONG == SIZEOF_LONG_LONG
 514         return (long long int) strtol(str, endptr, base);
 515 #else
 516 # error "You need a strtoll function"
 517 #endif
 518 }
 519 #else
 520 #ifdef HAVE_BSD_STRTOLL
 521 long long int rep_strtoll(const char *str, char **endptr, int base)
 522 {
 523         long long int nb = strtoll(str, endptr, base);
 524         /* With glibc EINVAL is only returned if base is not ok */
 525         if (errno == EINVAL) {
 526                 if (base == 0 || (base >1 && base <37)) {
 527                         /* Base was ok so it's because we were not
 528                          * able to make the convertion.
 529                          * Let's reset errno.
 530                          */
 531                         errno = 0;
 532                 }
 533         }
 534         return nb;
 535 }
 536 #endif /* HAVE_BSD_STRTOLL */
 537 #endif /* HAVE_STRTOLL */
 538
 539
 540 #ifndef HAVE_STRTOULL
 541 unsigned long long int rep_strtoull(const char *str, char **endptr, int base)
 542 {
 543 #ifdef HAVE_STRTOUQ
 544         return strtouq(str, endptr, base);
 545 #elif defined(HAVE___STRTOULL)
 546         return __strtoull(str, endptr, base);
 547 #elif SIZEOF_LONG == SIZEOF_LONG_LONG
 548         return (unsigned long long int) strtoul(str, endptr, base);
 549 #else
 550 # error "You need a strtoull function"
 551 #endif
 552 }
 553 #else
 554 #ifdef HAVE_BSD_STRTOLL
 555 #ifdef HAVE_STRTOUQ
 556 unsigned long long int rep_strtoull(const char *str, char **endptr, int base)
 557 {
 558         unsigned long long int nb = strtouq(str, endptr, base);
 559         /* In linux EINVAL is only returned if base is not ok */
 560         if (errno == EINVAL) {
 561                 if (base == 0 || (base >1 && base <37)) {
 562                         /* Base was ok so it's because we were not
 563                          * able to make the convertion.
 564                          * Let's reset errno.
 565                          */
 566                         errno = 0;
 567                 }
 568         }
 569         return nb;
 570 }
 571 #else
 572 #error "You need the strtouq function"
 573 #endif /* HAVE_STRTOUQ */
 574 #endif /* HAVE_BSD_STRTOLL */
 575 #endif /* HAVE_STRTOULL */
 576
 577 #ifndef HAVE_SETENV
 578 int rep_setenv(const char *name, const char *value, int overwrite)
 579 {
 580         char *p;
 581         size_t l1, l2;
 582         int ret;
 583
 584         if (!overwrite && getenv(name)) {
 585                 return 0;
 586         }
 587
 588         l1 = strlen(name);
 589         l2 = strlen(value);
 590
 591         p = malloc(l1+l2+2);
 592         if (p == NULL) {
 593                 return -1;
 594         }
 595         memcpy(p, name, l1);
 596         p[l1] = '=';
 597         memcpy(p+l1+1, value, l2);
 598         p[l1+l2+1] = 0;
 599
 600         ret = putenv(p);
 601         if (ret != 0) {
 602                 free(p);
 603         }
 604
 605         return ret;
 606 }
 607 #endif
 608
 609 #ifndef HAVE_UNSETENV
 610 int rep_unsetenv(const char *name)
 611 {
 612         extern char **environ;
 613         size_t len = strlen(name);
 614         size_t i, count;
 615
 616         if (environ == NULL || getenv(name) == NULL) {
 617                 return 0;
 618         }
 619
 620         for (i=0;environ[i];i++) /* noop */ ;
 621
 622         count=i;
 623
 624         for (i=0;i<count;) {
 625                 if (strncmp(environ[i], name, len) == 0 && environ[i][len] == '=') {
 626                         /* note: we do _not_ free the old variable here. It is unsafe to
 627                            do so, as the pointer may not have come from malloc */
 628                         memmove(&environ[i], &environ[i+1], (count-i)*sizeof(char *));
 629                         count--;
 630                 } else {
 631                         i++;
 632                 }
 633         }
 634
 635         return 0;
 636 }
 637 #endif
 638
 639 #ifndef HAVE_UTIME
 640 int rep_utime(const char *filename, const struct utimbuf *buf)
 641 {
 642         errno = ENOSYS;
 643         return -1;
 644 }
 645 #endif
 646
 647 #ifndef HAVE_UTIMES
 648 int rep_utimes(const char *filename, const struct timeval tv[2])
 649 {
 650         struct utimbuf u;
 651
 652         u.actime = tv[0].tv_sec;
 653         if (tv[0].tv_usec > 500000) {
 654                 u.actime += 1;
 655         }
 656
 657         u.modtime = tv[1].tv_sec;
 658         if (tv[1].tv_usec > 500000) {
 659                 u.modtime += 1;
 660         }
 661
 662         return utime(filename, &u);
 663 }
 664 #endif
 665
 666 #ifndef HAVE_DUP2
 667 int rep_dup2(int oldfd, int newfd)
 668 {
 669         errno = ENOSYS;
 670         return -1;
 671 }
 672 #endif
 673
 674 #ifndef HAVE_CHOWN
 675 /**
 676 chown isn't used much but OS/2 doesn't have it
 677 **/
 678 int rep_chown(const char *fname, uid_t uid, gid_t gid)
 679 {
 680         errno = ENOSYS;
 681         return -1;
 682 }
 683 #endif
 684
 685 #ifndef HAVE_LINK
 686 int rep_link(const char *oldpath, const char *newpath)
 687 {
 688         errno = ENOSYS;
 689         return -1;
 690 }
 691 #endif
 692
 693 #ifndef HAVE_READLINK
 694 int rep_readlink(const char *path, char *buf, size_t bufsiz)
 695 {
 696         errno = ENOSYS;
 697         return -1;
 698 }
 699 #endif
 700
 701 #ifndef HAVE_SYMLINK
 702 int rep_symlink(const char *oldpath, const char *newpath)
 703 {
 704         errno = ENOSYS;
 705         return -1;
 706 }
 707 #endif
 708
 709 #ifndef HAVE_LCHOWN
 710 int rep_lchown(const char *fname,uid_t uid,gid_t gid)
 711 {
 712         errno = ENOSYS;
 713         return -1;
 714 }
 715 #endif
 716
 717 #ifndef HAVE_REALPATH
 718 char *rep_realpath(const char *path, char *resolved_path)
 719 {
 720         /* As realpath is not a system call we can't return ENOSYS. */
 721         errno = EINVAL;
 722         return NULL;
 723 }
 724 #endif
 725
 726
 727 #ifndef HAVE_MEMMEM
 728 void *rep_memmem(const void *haystack, size_t haystacklen,
 729                  const void *needle, size_t needlelen)
 730 {
 731         if (needlelen == 0) {
 732                 return discard_const(haystack);
 733         }
 734         while (haystacklen >= needlelen) {
 735                 char *p = (char *)memchr(haystack, *(const char *)needle,
 736                                          haystacklen-(needlelen-1));
 737                 if (!p) return NULL;
 738                 if (memcmp(p, needle, needlelen) == 0) {
 739                         return p;
 740                 }
 741                 haystack = p+1;
 742                 haystacklen -= (p - (const char *)haystack) + 1;
 743         }
 744         return NULL;
 745 }
 746 #endif
 747
 748 #if !defined(HAVE_VDPRINTF) || !defined(HAVE_C99_VSNPRINTF)
 749 int rep_vdprintf(int fd, const char *format, va_list ap)
 750 {
 751         char *s = NULL;
 752         int ret;
 753
 754         vasprintf(&s, format, ap);
 755         if (s == NULL) {
 756                 errno = ENOMEM;
 757                 return -1;
 758         }
 759         ret = write(fd, s, strlen(s));
 760         free(s);
 761         return ret;
 762 }
 763 #endif
 764
 765 #if !defined(HAVE_DPRINTF) || !defined(HAVE_C99_VSNPRINTF)
 766 int rep_dprintf(int fd, const char *format, ...)
 767 {
 768         int ret;
 769         va_list ap;
 770
 771         va_start(ap, format);
 772         ret = vdprintf(fd, format, ap);
 773         va_end(ap);
 774
 775         return ret;
 776 }
 777 #endif
 778
 779 #ifndef HAVE_GET_CURRENT_DIR_NAME
 780 char *rep_get_current_dir_name(void)
 781 {
 782         char buf[PATH_MAX+1];
 783         char *p;
 784         p = getcwd(buf, sizeof(buf));
 785         if (p == NULL) {
 786                 return NULL;
 787         }
 788         return strdup(p);
 789 }
 790 #endif
 791
 792 #ifndef HAVE_STRERROR_R
 793 int rep_strerror_r(int errnum, char *buf, size_t buflen)
 794 {
 795         char *s = strerror(errnum);
 796         if (strlen(s)+1 > buflen) {
 797                 errno = ERANGE;
 798                 return -1;
 799         }
 800         strncpy(buf, s, buflen);
 801         return 0;
 802 }
 803 #endif
 804
 805 #ifndef HAVE_CLOCK_GETTIME
 806 int rep_clock_gettime(clockid_t clk_id, struct timespec *tp)
 807 {
 808         struct timeval tval;
 809         switch (clk_id) {
 810                 case 0: /* CLOCK_REALTIME :*/
 811 #ifdef HAVE_GETTIMEOFDAY_TZ
 812                         gettimeofday(&tval,NULL);
 813 #else
 814                         gettimeofday(&tval);
 815 #endif
 816                         tp->tv_sec = tval.tv_sec;
 817                         tp->tv_nsec = tval.tv_usec * 1000;
 818                         break;
 819                 default:
 820                         errno = EINVAL;
 821                         return -1;
 822         }
 823         return 0;
 824 }
 825 #endif
 826
 827 #ifndef HAVE_MEMALIGN
 828 void *rep_memalign( size_t align, size_t size )
 829 {
 830 #if defined(HAVE_POSIX_MEMALIGN)
 831         void *p = NULL;
 832         int ret = posix_memalign( &p, align, size );
 833         if ( ret == 0 )
 834                 return p;
 835
 836         return NULL;
 837 #else
 838         /* On *BSD systems memaligns doesn't exist, but memory will
 839          * be aligned on allocations of > pagesize. */
 840 #if defined(SYSCONF_SC_PAGESIZE)
 841         size_t pagesize = (size_t)sysconf(_SC_PAGESIZE);
 842 #elif defined(HAVE_GETPAGESIZE)
 843         size_t pagesize = (size_t)getpagesize();
 844 #else
 845         size_t pagesize = (size_t)-1;
 846 #endif
 847         if (pagesize == (size_t)-1) {
 848                 errno = ENOSYS;
 849                 return NULL;
 850         }
 851         if (size < pagesize) {
 852                 size = pagesize;
 853         }
 854         return malloc(size);
 855 #endif
 856 }
 857 #endif
 858
 859 #ifndef HAVE_GETPEEREID
 860 int rep_getpeereid(int s, uid_t *uid, gid_t *gid)
 861 {
 862 #if defined(HAVE_PEERCRED)
 863         struct ucred cred;
 864         socklen_t cred_len = sizeof(struct ucred);
 865         int ret;
 866
 867 #undef getsockopt
 868         ret = getsockopt(s, SOL_SOCKET, SO_PEERCRED, (void *)&cred, &cred_len);
 869         if (ret != 0) {
 870                 return -1;
 871         }
 872
 873         if (cred_len != sizeof(struct ucred)) {
 874                 errno = EINVAL;
 875                 return -1;
 876         }
 877
 878         *uid = cred.uid;
 879         *gid = cred.gid;
 880         return 0;
 881 #else
 882         errno = ENOSYS;
 883         return -1;
 884 #endif
 885 }
 886 #endif
 887
 888 #ifndef HAVE_USLEEP
 889 int rep_usleep(useconds_t sec)
 890 {
 891         struct timeval tval;
 892         /*
 893          * Fake it with select...
 894          */
 895         tval.tv_sec = 0;
 896         tval.tv_usec = usecs/1000;
 897         select(0,NULL,NULL,NULL,&tval);
 898         return 0;
 899 }
 900 #endif /* HAVE_USLEEP */
 901
 902 #ifndef HAVE_SETPROCTITLE
 903 void rep_setproctitle(const char *fmt, ...)
 904 {
 905 }
 906 #endif