spoolss: fill in spoolss_Create/DeletePrinterIC + rerun make samba3-idl.
[Samba/gbeck.git] / lib / replace / replace.c
blobfc15717349e1d189dcd9494d1bc2dd61e12ca92c
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
7 ** NOTE! The following LGPL license applies to the replace
8 ** library. This does NOT imply that all of Samba is released
9 ** under the LGPL
11 This library is free software; you can redistribute it and/or
12 modify it under the terms of the GNU Lesser General Public
13 License as published by the Free Software Foundation; either
14 version 3 of the License, or (at your option) any later version.
16 This library is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 Lesser General Public License for more details.
21 You should have received a copy of the GNU Lesser General Public
22 License along with this library; if not, see <http://www.gnu.org/licenses/>.
25 #include "replace.h"
27 #include "system/filesys.h"
28 #include "system/time.h"
29 #include "system/passwd.h"
30 #include "system/syslog.h"
31 #include "system/locale.h"
32 #include "system/wait.h"
34 #ifdef _WIN32
35 #define mkdir(d,m) _mkdir(d)
36 #endif
38 void replace_dummy(void);
39 void replace_dummy(void) {}
41 #ifndef HAVE_FTRUNCATE
42 /*******************************************************************
43 ftruncate for operating systems that don't have it
44 ********************************************************************/
45 int rep_ftruncate(int f, off_t l)
47 #ifdef HAVE_CHSIZE
48 return chsize(f,l);
49 #elif defined(F_FREESP)
50 struct flock fl;
52 fl.l_whence = 0;
53 fl.l_len = 0;
54 fl.l_start = l;
55 fl.l_type = F_WRLCK;
56 return fcntl(f, F_FREESP, &fl);
57 #else
58 #error "you must have a ftruncate function"
59 #endif
61 #endif /* HAVE_FTRUNCATE */
64 #ifndef HAVE_STRLCPY
65 /* like strncpy but does not 0 fill the buffer and always null
66 terminates. bufsize is the size of the destination buffer */
67 size_t rep_strlcpy(char *d, const char *s, size_t bufsize)
69 size_t len = strlen(s);
70 size_t ret = len;
71 if (bufsize <= 0) return 0;
72 if (len >= bufsize) len = bufsize-1;
73 memcpy(d, s, len);
74 d[len] = 0;
75 return ret;
77 #endif
79 #ifndef HAVE_STRLCAT
80 /* like strncat but does not 0 fill the buffer and always null
81 terminates. bufsize is the length of the buffer, which should
82 be one more than the maximum resulting string length */
83 size_t rep_strlcat(char *d, const char *s, size_t bufsize)
85 size_t len1 = strlen(d);
86 size_t len2 = strlen(s);
87 size_t ret = len1 + len2;
89 if (len1+len2 >= bufsize) {
90 if (bufsize < (len1+1)) {
91 return ret;
93 len2 = bufsize - (len1+1);
95 if (len2 > 0) {
96 memcpy(d+len1, s, len2);
97 d[len1+len2] = 0;
99 return ret;
101 #endif
103 #ifndef HAVE_MKTIME
104 /*******************************************************************
105 a mktime() replacement for those who don't have it - contributed by
106 C.A. Lademann <cal@zls.com>
107 Corrections by richard.kettlewell@kewill.com
108 ********************************************************************/
110 #define MINUTE 60
111 #define HOUR 60*MINUTE
112 #define DAY 24*HOUR
113 #define YEAR 365*DAY
114 time_t rep_mktime(struct tm *t)
116 struct tm *u;
117 time_t epoch = 0;
118 int n;
119 int mon [] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
120 y, m, i;
122 if(t->tm_year < 70)
123 return((time_t)-1);
125 n = t->tm_year + 1900 - 1;
126 epoch = (t->tm_year - 70) * YEAR +
127 ((n / 4 - n / 100 + n / 400) - (1969 / 4 - 1969 / 100 + 1969 / 400)) * DAY;
129 y = t->tm_year + 1900;
130 m = 0;
132 for(i = 0; i < t->tm_mon; i++) {
133 epoch += mon [m] * DAY;
134 if(m == 1 && y % 4 == 0 && (y % 100 != 0 || y % 400 == 0))
135 epoch += DAY;
137 if(++m > 11) {
138 m = 0;
139 y++;
143 epoch += (t->tm_mday - 1) * DAY;
144 epoch += t->tm_hour * HOUR + t->tm_min * MINUTE + t->tm_sec;
146 if((u = localtime(&epoch)) != NULL) {
147 t->tm_sec = u->tm_sec;
148 t->tm_min = u->tm_min;
149 t->tm_hour = u->tm_hour;
150 t->tm_mday = u->tm_mday;
151 t->tm_mon = u->tm_mon;
152 t->tm_year = u->tm_year;
153 t->tm_wday = u->tm_wday;
154 t->tm_yday = u->tm_yday;
155 t->tm_isdst = u->tm_isdst;
158 return(epoch);
160 #endif /* !HAVE_MKTIME */
163 #ifndef HAVE_INITGROUPS
164 /****************************************************************************
165 some systems don't have an initgroups call
166 ****************************************************************************/
167 int rep_initgroups(char *name, gid_t id)
169 #ifndef HAVE_SETGROUPS
170 /* yikes! no SETGROUPS or INITGROUPS? how can this work? */
171 errno = ENOSYS;
172 return -1;
173 #else /* HAVE_SETGROUPS */
175 #include <grp.h>
177 gid_t *grouplst = NULL;
178 int max_gr = NGROUPS_MAX;
179 int ret;
180 int i,j;
181 struct group *g;
182 char *gr;
184 if((grouplst = malloc(sizeof(gid_t) * max_gr)) == NULL) {
185 errno = ENOMEM;
186 return -1;
189 grouplst[0] = id;
190 i = 1;
191 while (i < max_gr && ((g = (struct group *)getgrent()) != (struct group *)NULL)) {
192 if (g->gr_gid == id)
193 continue;
194 j = 0;
195 gr = g->gr_mem[0];
196 while (gr && (*gr != (char)NULL)) {
197 if (strcmp(name,gr) == 0) {
198 grouplst[i] = g->gr_gid;
199 i++;
200 gr = (char *)NULL;
201 break;
203 gr = g->gr_mem[++j];
206 endgrent();
207 ret = setgroups(i, grouplst);
208 free(grouplst);
209 return ret;
210 #endif /* HAVE_SETGROUPS */
212 #endif /* HAVE_INITGROUPS */
215 #if (defined(SecureWare) && defined(SCO))
216 /* This is needed due to needing the nap() function but we don't want
217 to include the Xenix libraries since that will break other things...
218 BTW: system call # 0x0c28 is the same as calling nap() */
219 long nap(long milliseconds) {
220 return syscall(0x0c28, milliseconds);
222 #endif
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)
234 unsigned long d,s;
235 int i;
236 if (dest==src || !size) return(dest);
238 d = (unsigned long)dest;
239 s = (unsigned long)src;
241 if ((d >= (s+size)) || (s >= (d+size))) {
242 /* no overlap */
243 memcpy(dest,src,size);
244 return(dest);
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];
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];
282 return(dest);
284 #endif /* HAVE_MEMMOVE */
286 #ifndef HAVE_STRDUP
287 /****************************************************************************
288 duplicate a string
289 ****************************************************************************/
290 char *rep_strdup(const char *s)
292 size_t len;
293 char *ret;
295 if (!s) return(NULL);
297 len = strlen(s)+1;
298 ret = (char *)malloc(len);
299 if (!ret) return(NULL);
300 memcpy(ret,s,len);
301 return(ret);
303 #endif /* HAVE_STRDUP */
305 #ifndef HAVE_SETLINEBUF
306 void rep_setlinebuf(FILE *stream)
308 setvbuf(stream, (char *)NULL, _IOLBF, 0);
310 #endif /* HAVE_SETLINEBUF */
312 #ifndef HAVE_VSYSLOG
313 #ifdef HAVE_SYSLOG
314 void rep_vsyslog (int facility_priority, const char *format, va_list arglist)
316 char *msg = NULL;
317 vasprintf(&msg, format, arglist);
318 if (!msg)
319 return;
320 syslog(facility_priority, "%s", msg);
321 free(msg);
323 #endif /* HAVE_SYSLOG */
324 #endif /* HAVE_VSYSLOG */
326 #ifndef HAVE_STRNLEN
328 Some platforms don't have strnlen
330 size_t rep_strnlen(const char *s, size_t max)
332 size_t len;
334 for (len = 0; len < max; len++) {
335 if (s[len] == '\0') {
336 break;
339 return len;
341 #endif
343 #ifndef HAVE_STRNDUP
345 Some platforms don't have strndup.
347 char *rep_strndup(const char *s, size_t n)
349 char *ret;
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;
358 return ret;
360 #endif
362 #if !defined(HAVE_WAITPID) && defined(HAVE_WAIT4)
363 int rep_waitpid(pid_t pid,int *status,int options)
365 return wait4(pid, status, options, NULL);
367 #endif
369 #ifndef HAVE_SETEUID
370 int rep_seteuid(uid_t euid)
372 #ifdef HAVE_SETRESUID
373 return setresuid(-1, euid, -1);
374 #else
375 errno = ENOSYS;
376 return -1;
377 #endif
379 #endif
381 #ifndef HAVE_SETEGID
382 int rep_setegid(gid_t egid)
384 #ifdef HAVE_SETRESGID
385 return setresgid(-1, egid, -1);
386 #else
387 errno = ENOSYS;
388 return -1;
389 #endif
391 #endif
393 /*******************************************************************
394 os/2 also doesn't have chroot
395 ********************************************************************/
396 #ifndef HAVE_CHROOT
397 int rep_chroot(const char *dname)
399 errno = ENOSYS;
400 return -1;
402 #endif
404 /*****************************************************************
405 Possibly replace mkstemp if it is broken.
406 *****************************************************************/
408 #ifndef HAVE_SECURE_MKSTEMP
409 int rep_mkstemp(char *template)
411 /* have a reasonable go at emulating it. Hope that
412 the system mktemp() isn't completly hopeless */
413 char *p = mktemp(template);
414 if (!p)
415 return -1;
416 return open(p, O_CREAT|O_EXCL|O_RDWR, 0600);
418 #endif
420 #ifndef HAVE_MKDTEMP
421 char *rep_mkdtemp(char *template)
423 char *dname;
425 if ((dname = mktemp(template))) {
426 if (mkdir(dname, 0700) >= 0) {
427 return dname;
431 return NULL;
433 #endif
435 /*****************************************************************
436 Watch out: this is not thread safe.
437 *****************************************************************/
439 #ifndef HAVE_PREAD
440 ssize_t rep_pread(int __fd, void *__buf, size_t __nbytes, off_t __offset)
442 if (lseek(__fd, __offset, SEEK_SET) != __offset) {
443 return -1;
445 return read(__fd, __buf, __nbytes);
447 #endif
449 /*****************************************************************
450 Watch out: this is not thread safe.
451 *****************************************************************/
453 #ifndef HAVE_PWRITE
454 ssize_t rep_pwrite(int __fd, const void *__buf, size_t __nbytes, off_t __offset)
456 if (lseek(__fd, __offset, SEEK_SET) != __offset) {
457 return -1;
459 return write(__fd, __buf, __nbytes);
461 #endif
463 #ifndef HAVE_STRCASESTR
464 char *rep_strcasestr(const char *haystack, const char *needle)
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);
474 return NULL;
476 #endif
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)
482 char *token;
484 if (s == NULL) s = *save_ptr;
486 s += strspn(s, delim);
487 if (*s == '\0') {
488 *save_ptr = s;
489 return NULL;
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;
501 return token;
503 #endif
505 #ifndef HAVE_STRTOLL
506 long long int rep_strtoll(const char *str, char **endptr, int base)
508 #ifdef HAVE_STRTOQ
509 return strtoq(str, endptr, base);
510 #elif defined(HAVE___STRTOLL)
511 return __strtoll(str, endptr, base);
512 #elif SIZEOF_LONG == SIZEOF_LONG_LONG
513 return (long long int) strtol(str, endptr, base);
514 #else
515 # error "You need a strtoll function"
516 #endif
518 #endif
521 #ifndef HAVE_STRTOULL
522 unsigned long long int rep_strtoull(const char *str, char **endptr, int base)
524 #ifdef HAVE_STRTOUQ
525 return strtouq(str, endptr, base);
526 #elif defined(HAVE___STRTOULL)
527 return __strtoull(str, endptr, base);
528 #elif SIZEOF_LONG == SIZEOF_LONG_LONG
529 return (unsigned long long int) strtoul(str, endptr, base);
530 #else
531 # error "You need a strtoull function"
532 #endif
534 #endif
536 #ifndef HAVE_SETENV
537 int rep_setenv(const char *name, const char *value, int overwrite)
539 char *p;
540 size_t l1, l2;
541 int ret;
543 if (!overwrite && getenv(name)) {
544 return 0;
547 l1 = strlen(name);
548 l2 = strlen(value);
550 p = malloc(l1+l2+2);
551 if (p == NULL) {
552 return -1;
554 memcpy(p, name, l1);
555 p[l1] = '=';
556 memcpy(p+l1+1, value, l2);
557 p[l1+l2+1] = 0;
559 ret = putenv(p);
560 if (ret != 0) {
561 free(p);
564 return ret;
566 #endif
568 #ifndef HAVE_UNSETENV
569 int rep_unsetenv(const char *name)
571 extern char **environ;
572 size_t len = strlen(name);
573 size_t i, count;
575 if (environ == NULL || getenv(name) == NULL) {
576 return 0;
579 for (i=0;environ[i];i++) /* noop */ ;
581 count=i;
583 for (i=0;i<count;) {
584 if (strncmp(environ[i], name, len) == 0 && environ[i][len] == '=') {
585 /* note: we do _not_ free the old variable here. It is unsafe to
586 do so, as the pointer may not have come from malloc */
587 memmove(&environ[i], &environ[i+1], (count-i)*sizeof(char *));
588 count--;
589 } else {
590 i++;
594 return 0;
596 #endif
598 #ifndef HAVE_UTIME
599 int rep_utime(const char *filename, const struct utimbuf *buf)
601 errno = ENOSYS;
602 return -1;
604 #endif
606 #ifndef HAVE_UTIMES
607 int rep_utimes(const char *filename, const struct timeval tv[2])
609 struct utimbuf u;
611 u.actime = tv[0].tv_sec;
612 if (tv[0].tv_usec > 500000) {
613 u.actime += 1;
616 u.modtime = tv[1].tv_sec;
617 if (tv[1].tv_usec > 500000) {
618 u.modtime += 1;
621 return utime(filename, &u);
623 #endif
625 #ifndef HAVE_DUP2
626 int rep_dup2(int oldfd, int newfd)
628 errno = ENOSYS;
629 return -1;
631 #endif
633 #ifndef HAVE_CHOWN
635 chown isn't used much but OS/2 doesn't have it
637 int rep_chown(const char *fname, uid_t uid, gid_t gid)
639 errno = ENOSYS;
640 return -1;
642 #endif
644 #ifndef HAVE_LINK
645 int rep_link(const char *oldpath, const char *newpath)
647 errno = ENOSYS;
648 return -1;
650 #endif
652 #ifndef HAVE_READLINK
653 int rep_readlink(const char *path, char *buf, size_t bufsiz)
655 errno = ENOSYS;
656 return -1;
658 #endif
660 #ifndef HAVE_SYMLINK
661 int rep_symlink(const char *oldpath, const char *newpath)
663 errno = ENOSYS;
664 return -1;
666 #endif
668 #ifndef HAVE_LCHOWN
669 int rep_lchown(const char *fname,uid_t uid,gid_t gid)
671 errno = ENOSYS;
672 return -1;
674 #endif
676 #ifndef HAVE_REALPATH
677 char *rep_realpath(const char *path, char *resolved_path)
679 /* As realpath is not a system call we can't return ENOSYS. */
680 errno = EINVAL;
681 return NULL;
683 #endif