2 Unix SMB/CIFS implementation.
3 replacement routines for broken systems
4 Copyright (C) Andrew Tridgell 1992-1998
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 #include "system/wait.h"
23 #include "system/time.h"
24 #include "system/network.h"
26 void replace_dummy(void);
27 void replace_dummy(void) {}
29 #ifndef HAVE_FTRUNCATE
30 /*******************************************************************
31 ftruncate for operating systems that don't have it
32 ********************************************************************/
33 int ftruncate(int f,off_t l)
44 return fcntl(f, F_FREESP, &fl);
47 #endif /* HAVE_FTRUNCATE */
51 /* like strncpy but does not 0 fill the buffer and always null
52 terminates. bufsize is the size of the destination buffer */
53 size_t strlcpy(char *d, const char *s, size_t bufsize)
55 size_t len = strlen(s);
57 if (bufsize <= 0) return 0;
58 if (len >= bufsize) len = bufsize-1;
66 /* like strncat but does not 0 fill the buffer and always null
67 terminates. bufsize is the length of the buffer, which should
68 be one more than the maximum resulting string length */
69 size_t strlcat(char *d, const char *s, size_t bufsize)
71 size_t len1 = strlen(d);
72 size_t len2 = strlen(s);
73 size_t ret = len1 + len2;
75 if (len1+len2 >= bufsize) {
76 len2 = bufsize - (len1+1);
79 memcpy(d+len1, s, len2);
87 /*******************************************************************
88 a mktime() replacement for those who don't have it - contributed by
89 C.A. Lademann <cal@zls.com>
90 Corrections by richard.kettlewell@kewill.com
91 ********************************************************************/
94 #define HOUR 60*MINUTE
97 time_t mktime(struct tm *t)
102 int mon [] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
108 n = t->tm_year + 1900 - 1;
109 epoch = (t->tm_year - 70) * YEAR +
110 ((n / 4 - n / 100 + n / 400) - (1969 / 4 - 1969 / 100 + 1969 / 400)) * DAY;
112 y = t->tm_year + 1900;
115 for(i = 0; i < t->tm_mon; i++) {
116 epoch += mon [m] * DAY;
117 if(m == 1 && y % 4 == 0 && (y % 100 != 0 || y % 400 == 0))
126 epoch += (t->tm_mday - 1) * DAY;
127 epoch += t->tm_hour * HOUR + t->tm_min * MINUTE + t->tm_sec;
129 if((u = localtime(&epoch)) != NULL) {
130 t->tm_sec = u->tm_sec;
131 t->tm_min = u->tm_min;
132 t->tm_hour = u->tm_hour;
133 t->tm_mday = u->tm_mday;
134 t->tm_mon = u->tm_mon;
135 t->tm_year = u->tm_year;
136 t->tm_wday = u->tm_wday;
137 t->tm_yday = u->tm_yday;
138 t->tm_isdst = u->tm_isdst;
143 #endif /* !HAVE_MKTIME */
148 /* Rename a file. (from libiberty in GNU binutils) */
149 int rename(const char *zfrom, const char *zto)
151 if (link (zfrom, zto) < 0)
156 || link (zfrom, zto) < 0)
159 return unlink (zfrom);
161 #endif /* HAVE_RENAME */
165 #if defined(HAVE_SETNETGRENT) && defined(HAVE_GETNETGRENT) && defined(HAVE_ENDNETGRENT)
167 * Search for a match in a netgroup. This replaces it on broken systems.
169 int innetgr(const char *group,const char *host,const char *user,const char *dom)
171 char *hst, *usr, *dm;
174 while (getnetgrent(&hst, &usr, &dm)) {
175 if (((host == 0) || (hst == 0) || !strcmp(host, hst)) &&
176 ((user == 0) || (usr == 0) || !strcmp(user, usr)) &&
177 ((dom == 0) || (dm == 0) || !strcmp(dom, dm))) {
185 #endif /* HAVE_SETNETGRENT HAVE_GETNETGRENT HAVE_ENDNETGRENT */
186 #endif /* HAVE_INNETGR */
190 #ifndef HAVE_INITGROUPS
191 /****************************************************************************
192 some systems don't have an initgroups call
193 ****************************************************************************/
194 int initgroups(char *name, gid_t id)
196 #ifndef HAVE_SETGROUPS
197 /* yikes! no SETGROUPS or INITGROUPS? how can this work? */
200 #else /* HAVE_SETGROUPS */
201 gid_t *grouplst = NULL;
202 int max_gr = groups_max();
208 if((grouplst = malloc(sizeof(gid_t) * max_gr)) == NULL) {
215 while (i < max_gr && ((g = (struct group *)getgrent()) != (struct group *)NULL)) {
220 while (gr && (*gr != (char)NULL)) {
221 if (strcmp(name,gr) == 0) {
222 grouplst[i] = g->gr_gid;
231 ret = setgroups(i, grouplst);
234 #endif /* HAVE_SETGROUPS */
236 #endif /* HAVE_INITGROUPS */
239 #if (defined(SecureWare) && defined(SCO))
240 /* This is needed due to needing the nap() function but we don't want
241 to include the Xenix libraries since that will break other things...
242 BTW: system call # 0x0c28 is the same as calling nap() */
243 long nap(long milliseconds) {
244 return syscall(0x0c28, milliseconds);
250 /*******************************************************************
251 safely copies memory, ensuring no overlap problems.
252 this is only used if the machine does not have it's own memmove().
253 this is not the fastest algorithm in town, but it will do for our
255 ********************************************************************/
256 void *memmove(void *dest,const void *src,int size)
260 if (dest==src || !size) return(dest);
262 d = (unsigned long)dest;
263 s = (unsigned long)src;
265 if ((d >= (s+size)) || (s >= (d+size))) {
267 memcpy(dest,src,size);
272 /* we can forward copy */
273 if (s-d >= sizeof(int) &&
276 !(size%sizeof(int))) {
277 /* do it all as words */
278 int *idest = (int *)dest;
279 int *isrc = (int *)src;
281 for (i=0;i<size;i++) idest[i] = isrc[i];
284 char *cdest = (char *)dest;
285 char *csrc = (char *)src;
286 for (i=0;i<size;i++) cdest[i] = csrc[i];
289 /* must backward copy */
290 if (d-s >= sizeof(int) &&
293 !(size%sizeof(int))) {
294 /* do it all as words */
295 int *idest = (int *)dest;
296 int *isrc = (int *)src;
298 for (i=size-1;i>=0;i--) idest[i] = isrc[i];
301 char *cdest = (char *)dest;
302 char *csrc = (char *)src;
303 for (i=size-1;i>=0;i--) cdest[i] = csrc[i];
308 #endif /* HAVE_MEMMOVE */
311 /****************************************************************************
313 ****************************************************************************/
314 char *strdup(const char *s)
319 if (!s) return(NULL);
322 ret = (char *)malloc(len);
323 if (!ret) return(NULL);
327 #endif /* HAVE_STRDUP */
329 #ifndef WITH_PTHREADS
330 /* REWRITE: not thread safe */
331 #ifdef REPLACE_INET_NTOA
332 char *rep_inet_ntoa(struct in_addr ip)
334 uint8_t *p = (uint8_t *)&ip.s_addr;
336 slprintf(buf, 17, "%d.%d.%d.%d",
337 (int)p[0], (int)p[1], (int)p[2], (int)p[3]);
340 #endif /* REPLACE_INET_NTOA */
343 #ifndef HAVE_SETLINEBUF
344 int setlinebuf(FILE *stream)
346 return setvbuf(stream, (char *)NULL, _IOLBF, 0);
348 #endif /* HAVE_SETLINEBUF */
352 void vsyslog (int facility_priority, char *format, va_list arglist)
355 vasprintf(&msg, format, arglist);
358 syslog(facility_priority, "%s", msg);
361 #endif /* HAVE_SYSLOG */
362 #endif /* HAVE_VSYSLOG */
364 /*******************************************************************
365 yield the difference between *A and *B, in seconds, ignoring leap seconds
366 ********************************************************************/
367 static int tm_diff(struct tm *a, struct tm *b)
369 int ay = a->tm_year + (1900 - 1);
370 int by = b->tm_year + (1900 - 1);
371 int intervening_leap_days =
372 (ay/4 - by/4) - (ay/100 - by/100) + (ay/400 - by/400);
374 int days = 365*years + intervening_leap_days + (a->tm_yday - b->tm_yday);
375 int hours = 24*days + (a->tm_hour - b->tm_hour);
376 int minutes = 60*hours + (a->tm_min - b->tm_min);
377 int seconds = 60*minutes + (a->tm_sec - b->tm_sec);
382 /*******************************************************************
383 return the UTC offset in seconds west of UTC, or 0 if it cannot be determined
384 ******************************************************************/
385 int get_time_zone(time_t t)
387 struct tm *tm = gmtime(&t);
395 return tm_diff(&tm_utc,tm);
400 yes, I know this looks insane, but its really needed. The function in the
401 Linux timegm() manpage does not work on solaris.
403 time_t timegm(struct tm *tm)
411 tm3 = *localtime(&t);
413 tm2.tm_isdst = tm3.tm_isdst;
415 t -= get_time_zone(t);
422 int setenv(const char *name, const char *value, int overwrite)
427 asprintf(&p, "%s=%s", name, value);
429 if (overwrite || getenv(name)) {
430 if (p) ret = putenv(p);
440 #ifndef HAVE_STRTOULL
441 unsigned long long int strtoull(const char *str, char **endptr, int base)
444 return strtouq(str, endptr, base);
445 #elif defined(HAVE___STRTOULL)
446 return __strtoull(str, endptr, base);
448 # error "You need a strtoull function"
454 long long int strtoll(const char *str, char **endptr, int base)
457 return strtoq(str, endptr, base);
458 #elif defined(HAVE___STRTOLL)
459 return __strtoll(str, endptr, base);
461 # error "You need a strtoll function"
469 Some platforms don't have strndup.
471 char *strndup(const char *s, size_t n)
488 Some platforms don't have strnlen
490 size_t strnlen(const char *s, size_t n)
493 for (i=0; s[i] && i<n; i++)
499 int sys_waitpid(pid_t pid,int *status,int options)
502 return waitpid(pid,status,options);
503 #else /* USE_WAITPID */
504 return wait4(pid, status, options, NULL);
505 #endif /* USE_WAITPID */
509 int seteuid(uid_t euid)
511 #ifdef HAVE_SETRESUID
512 return setresuid(-1, euid, -1);
514 # error "You need a seteuid function"
520 int setegid(gid_t egid)
522 #ifdef HAVE_SETRESGID
523 return setresgid(-1, egid, -1);
525 # error "You need a setegid function"