2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 1998-2005
6 Copyright (C) Timur Bakeyev 2005
7 Copyright (C) Bjoern Jacke 2006-2007
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>.
24 #include "system/syslog.h"
25 #include "system/capability.h"
26 #include "system/passwd.h"
27 #include "system/filesys.h"
28 #include "../lib/util/setid.h"
30 #ifdef HAVE_SYS_SYSCTL_H
31 #include <sys/sysctl.h>
34 #ifdef HAVE_SYS_PRCTL_H
35 #include <sys/prctl.h>
39 The idea is that this file will eventually have wrappers around all
40 important system calls in samba. The aims are:
42 - to enable easier porting by putting OS dependent stuff in here
44 - to allow for hooks into other "pseudo-filesystems"
46 - to allow easier integration of things like the japanese extensions
48 - to support the philosophy of Samba to expose the features of
49 the OS within the SMB model. In general whatever file/printer/variable
50 expansions/etc make sense to the OS should be acceptable to Samba.
53 /*******************************************************************
54 A send wrapper that will deal with EINTR or EAGAIN or EWOULDBLOCK.
55 ********************************************************************/
57 ssize_t sys_send(int s, const void *msg, size_t len, int flags)
62 ret = send(s, msg, len, flags);
63 } while (ret == -1 && (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK));
68 /*******************************************************************
69 A recvfrom wrapper that will deal with EINTR.
70 NB. As used with non-blocking sockets, return on EAGAIN/EWOULDBLOCK
71 ********************************************************************/
73 ssize_t sys_recvfrom(int s, void *buf, size_t len, int flags, struct sockaddr *from, socklen_t *fromlen)
78 ret = recvfrom(s, buf, len, flags, from, fromlen);
79 } while (ret == -1 && (errno == EINTR));
83 /*******************************************************************
84 A fcntl wrapper that will deal with EINTR.
85 ********************************************************************/
87 int sys_fcntl_ptr(int fd, int cmd, void *arg)
92 ret = fcntl(fd, cmd, arg);
93 } while (ret == -1 && errno == EINTR);
97 /*******************************************************************
98 A fcntl wrapper that will deal with EINTR.
99 ********************************************************************/
101 int sys_fcntl_long(int fd, int cmd, long arg)
106 ret = fcntl(fd, cmd, arg);
107 } while (ret == -1 && errno == EINTR);
111 /****************************************************************************
112 Get/Set all the possible time fields from a stat struct as a timespec.
113 ****************************************************************************/
115 static struct timespec get_atimespec(const struct stat *pst)
117 #if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
120 /* Old system - no ns timestamp. */
121 ret.tv_sec = pst->st_atime;
125 #if defined(HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC)
127 ret.tv_sec = pst->st_atim.tv_sec;
128 ret.tv_nsec = pst->st_atim.tv_nsec;
130 #elif defined(HAVE_STRUCT_STAT_ST_MTIMENSEC)
132 ret.tv_sec = pst->st_atime;
133 ret.tv_nsec = pst->st_atimensec;
135 #elif defined(HAVE_STRUCT_STAT_ST_MTIME_N)
137 ret.tv_sec = pst->st_atime;
138 ret.tv_nsec = pst->st_atime_n;
140 #elif defined(HAVE_STRUCT_STAT_ST_UMTIME)
142 ret.tv_sec = pst->st_atime;
143 ret.tv_nsec = pst->st_uatime * 1000;
145 #elif defined(HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC)
146 return pst->st_atimespec;
148 #error CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
153 static struct timespec get_mtimespec(const struct stat *pst)
155 #if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
158 /* Old system - no ns timestamp. */
159 ret.tv_sec = pst->st_mtime;
163 #if defined(HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC)
165 ret.tv_sec = pst->st_mtim.tv_sec;
166 ret.tv_nsec = pst->st_mtim.tv_nsec;
168 #elif defined(HAVE_STRUCT_STAT_ST_MTIMENSEC)
170 ret.tv_sec = pst->st_mtime;
171 ret.tv_nsec = pst->st_mtimensec;
173 #elif defined(HAVE_STRUCT_STAT_ST_MTIME_N)
175 ret.tv_sec = pst->st_mtime;
176 ret.tv_nsec = pst->st_mtime_n;
178 #elif defined(HAVE_STRUCT_STAT_ST_UMTIME)
180 ret.tv_sec = pst->st_mtime;
181 ret.tv_nsec = pst->st_umtime * 1000;
183 #elif defined(HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC)
184 return pst->st_mtimespec;
186 #error CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
191 static struct timespec get_ctimespec(const struct stat *pst)
193 #if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
196 /* Old system - no ns timestamp. */
197 ret.tv_sec = pst->st_ctime;
201 #if defined(HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC)
203 ret.tv_sec = pst->st_ctim.tv_sec;
204 ret.tv_nsec = pst->st_ctim.tv_nsec;
206 #elif defined(HAVE_STRUCT_STAT_ST_MTIMENSEC)
208 ret.tv_sec = pst->st_ctime;
209 ret.tv_nsec = pst->st_ctimensec;
211 #elif defined(HAVE_STRUCT_STAT_ST_MTIME_N)
213 ret.tv_sec = pst->st_ctime;
214 ret.tv_nsec = pst->st_ctime_n;
216 #elif defined(HAVE_STRUCT_STAT_ST_UMTIME)
218 ret.tv_sec = pst->st_ctime;
219 ret.tv_nsec = pst->st_uctime * 1000;
221 #elif defined(HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC)
222 return pst->st_ctimespec;
224 #error CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
229 /****************************************************************************
230 Return the best approximation to a 'create time' under UNIX from a stat
232 ****************************************************************************/
234 static struct timespec calc_create_time_stat(const struct stat *st)
236 struct timespec ret, ret1;
237 struct timespec c_time = get_ctimespec(st);
238 struct timespec m_time = get_mtimespec(st);
239 struct timespec a_time = get_atimespec(st);
241 ret = timespec_compare(&c_time, &m_time) < 0 ? c_time : m_time;
242 ret1 = timespec_compare(&ret, &a_time) < 0 ? ret : a_time;
244 if(!null_timespec(ret1)) {
249 * One of ctime, mtime or atime was zero (probably atime).
250 * Just return MIN(ctime, mtime).
255 /****************************************************************************
256 Return the best approximation to a 'create time' under UNIX from a stat_ex
258 ****************************************************************************/
260 static struct timespec calc_create_time_stat_ex(const struct stat_ex *st)
262 struct timespec ret, ret1;
263 struct timespec c_time = st->st_ex_ctime;
264 struct timespec m_time = st->st_ex_mtime;
265 struct timespec a_time = st->st_ex_atime;
267 ret = timespec_compare(&c_time, &m_time) < 0 ? c_time : m_time;
268 ret1 = timespec_compare(&ret, &a_time) < 0 ? ret : a_time;
270 if(!null_timespec(ret1)) {
275 * One of ctime, mtime or atime was zero (probably atime).
276 * Just return MIN(ctime, mtime).
281 /****************************************************************************
282 Return the 'create time' from a stat struct if it exists (birthtime) or else
283 use the best approximation.
284 ****************************************************************************/
286 static void make_create_timespec(const struct stat *pst, struct stat_ex *dst,
287 bool fake_dir_create_times)
289 if (S_ISDIR(pst->st_mode) && fake_dir_create_times) {
290 dst->st_ex_btime.tv_sec = 315493200L; /* 1/1/1980 */
291 dst->st_ex_btime.tv_nsec = 0;
294 dst->st_ex_iflags &= ~ST_EX_IFLAG_CALCULATED_BTIME;
296 #if defined(HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC)
297 dst->st_ex_btime = pst->st_birthtimespec;
298 #elif defined(HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC)
299 dst->st_ex_btime.tv_sec = pst->st_birthtime;
300 dst->st_ex_btime.tv_nsec = pst->st_birthtimenspec;
301 #elif defined(HAVE_STRUCT_STAT_ST_BIRTHTIME)
302 dst->st_ex_btime.tv_sec = pst->st_birthtime;
303 dst->st_ex_btime.tv_nsec = 0;
305 dst->st_ex_btime = calc_create_time_stat(pst);
306 dst->st_ex_iflags |= ST_EX_IFLAG_CALCULATED_BTIME;
309 /* Deal with systems that don't initialize birthtime correctly.
310 * Pointed out by SATOH Fumiyasu <fumiyas@osstech.jp>.
312 if (null_timespec(dst->st_ex_btime)) {
313 dst->st_ex_btime = calc_create_time_stat(pst);
314 dst->st_ex_iflags |= ST_EX_IFLAG_CALCULATED_BTIME;
317 dst->st_ex_itime = dst->st_ex_btime;
318 dst->st_ex_iflags |= ST_EX_IFLAG_CALCULATED_ITIME;
321 /****************************************************************************
322 If we update a timestamp in a stat_ex struct we may have to recalculate
323 the birthtime. For now only implement this for write time, but we may
324 also need to do it for atime and ctime. JRA.
325 ****************************************************************************/
327 void update_stat_ex_mtime(struct stat_ex *dst,
328 struct timespec write_ts)
330 dst->st_ex_mtime = write_ts;
332 /* We may have to recalculate btime. */
333 if (dst->st_ex_iflags & ST_EX_IFLAG_CALCULATED_BTIME) {
334 dst->st_ex_btime = calc_create_time_stat_ex(dst);
338 void update_stat_ex_create_time(struct stat_ex *dst,
339 struct timespec create_time)
341 dst->st_ex_btime = create_time;
342 dst->st_ex_iflags &= ~ST_EX_IFLAG_CALCULATED_BTIME;
345 void init_stat_ex_from_stat (struct stat_ex *dst,
346 const struct stat *src,
347 bool fake_dir_create_times)
349 dst->st_ex_dev = src->st_dev;
350 dst->st_ex_ino = src->st_ino;
351 dst->st_ex_mode = src->st_mode;
352 dst->st_ex_nlink = src->st_nlink;
353 dst->st_ex_uid = src->st_uid;
354 dst->st_ex_gid = src->st_gid;
355 dst->st_ex_rdev = src->st_rdev;
356 dst->st_ex_size = src->st_size;
357 dst->st_ex_atime = get_atimespec(src);
358 dst->st_ex_mtime = get_mtimespec(src);
359 dst->st_ex_ctime = get_ctimespec(src);
360 dst->st_ex_iflags = 0;
361 make_create_timespec(src, dst, fake_dir_create_times);
362 #ifdef HAVE_STAT_ST_BLKSIZE
363 dst->st_ex_blksize = src->st_blksize;
365 dst->st_ex_blksize = STAT_ST_BLOCKSIZE;
368 #ifdef HAVE_STAT_ST_BLOCKS
369 dst->st_ex_blocks = src->st_blocks;
371 dst->st_ex_blocks = src->st_size / dst->st_ex_blksize + 1;
374 #ifdef HAVE_STAT_ST_FLAGS
375 dst->st_ex_flags = src->st_flags;
377 dst->st_ex_flags = 0;
381 /*******************************************************************
383 ********************************************************************/
385 int sys_stat(const char *fname, SMB_STRUCT_STAT *sbuf,
386 bool fake_dir_create_times)
390 ret = stat(fname, &statbuf);
392 /* we always want directories to appear zero size */
393 if (S_ISDIR(statbuf.st_mode)) {
396 init_stat_ex_from_stat(sbuf, &statbuf, fake_dir_create_times);
401 /*******************************************************************
403 ********************************************************************/
405 int sys_fstat(int fd, SMB_STRUCT_STAT *sbuf, bool fake_dir_create_times)
409 ret = fstat(fd, &statbuf);
411 /* we always want directories to appear zero size */
412 if (S_ISDIR(statbuf.st_mode)) {
415 init_stat_ex_from_stat(sbuf, &statbuf, fake_dir_create_times);
420 /*******************************************************************
422 ********************************************************************/
424 int sys_lstat(const char *fname,SMB_STRUCT_STAT *sbuf,
425 bool fake_dir_create_times)
429 ret = lstat(fname, &statbuf);
431 /* we always want directories to appear zero size */
432 if (S_ISDIR(statbuf.st_mode)) {
435 init_stat_ex_from_stat(sbuf, &statbuf, fake_dir_create_times);
440 /*******************************************************************
441 An posix_fallocate() wrapper.
442 ********************************************************************/
443 int sys_posix_fallocate(int fd, off_t offset, off_t len)
445 #if defined(HAVE_POSIX_FALLOCATE)
446 return posix_fallocate(fd, offset, len);
447 #elif defined(F_RESVSP64)
448 /* this handles XFS on IRIX */
450 off_t new_len = offset + len;
454 /* unlikely to get a too large file on a 64bit system but ... */
458 fl.l_whence = SEEK_SET;
462 ret=fcntl(fd, F_RESVSP64, &fl);
467 /* Make sure the file gets enlarged after we allocated space: */
469 if (new_len > sbuf.st_size)
470 ftruncate64(fd, new_len);
477 /*******************************************************************
478 An fallocate() function that matches the semantics of the Linux one.
479 ********************************************************************/
481 #ifdef HAVE_LINUX_FALLOC_H
482 #include <linux/falloc.h>
485 int sys_fallocate(int fd, uint32_t mode, off_t offset, off_t len)
487 #if defined(HAVE_LINUX_FALLOCATE)
490 if (mode & VFS_FALLOCATE_FL_KEEP_SIZE) {
491 lmode |= FALLOC_FL_KEEP_SIZE;
492 mode &= ~VFS_FALLOCATE_FL_KEEP_SIZE;
495 #if defined(HAVE_FALLOC_FL_PUNCH_HOLE)
496 if (mode & VFS_FALLOCATE_FL_PUNCH_HOLE) {
497 lmode |= FALLOC_FL_PUNCH_HOLE;
498 mode &= ~VFS_FALLOCATE_FL_PUNCH_HOLE;
500 #endif /* HAVE_FALLOC_FL_PUNCH_HOLE */
503 DEBUG(2, ("unmapped fallocate flags: %lx\n",
504 (unsigned long)mode));
508 return fallocate(fd, lmode, offset, len);
509 #else /* HAVE_LINUX_FALLOCATE */
510 /* TODO - plumb in fallocate from other filesysetms like VXFS etc. JRA. */
513 #endif /* HAVE_LINUX_FALLOCATE */
516 #ifdef HAVE_KERNEL_SHARE_MODES
518 #define LOCK_MAND 32 /* This is a mandatory flock */
519 #define LOCK_READ 64 /* ... Which allows concurrent read operations */
520 #define LOCK_WRITE 128 /* ... Which allows concurrent write operations */
521 #define LOCK_RW 192 /* ... Which allows concurrent read & write ops */
525 /*******************************************************************
526 A flock() wrapper that will perform the kernel flock.
527 ********************************************************************/
529 void kernel_flock(int fd, uint32_t share_mode, uint32_t access_mask)
531 #ifdef HAVE_KERNEL_SHARE_MODES
533 if (share_mode == FILE_SHARE_WRITE) {
534 kernel_mode = LOCK_MAND|LOCK_WRITE;
535 } else if (share_mode == FILE_SHARE_READ) {
536 kernel_mode = LOCK_MAND|LOCK_READ;
537 } else if (share_mode == FILE_SHARE_NONE) {
538 kernel_mode = LOCK_MAND;
541 flock(fd, kernel_mode);
549 /*******************************************************************
550 An fdopendir wrapper.
551 ********************************************************************/
553 DIR *sys_fdopendir(int fd)
555 #if defined(HAVE_FDOPENDIR)
556 return fdopendir(fd);
563 /*******************************************************************
565 ********************************************************************/
567 int sys_mknod(const char *path, mode_t mode, SMB_DEV_T dev)
569 #if defined(HAVE_MKNOD)
570 return mknod(path, mode, dev);
572 /* No mknod system call. */
578 /*******************************************************************
579 System wrapper for getwd. Always returns MALLOC'ed memory, or NULL
580 on error (malloc fail usually).
581 ********************************************************************/
583 char *sys_getwd(void)
585 #ifdef GETCWD_TAKES_NULL
586 return getcwd(NULL, 0);
587 #elif defined(HAVE_GETCWD)
588 char *wd = NULL, *s = NULL;
589 size_t allocated = PATH_MAX;
592 s = SMB_REALLOC_ARRAY(s, char, allocated);
596 wd = getcwd(s, allocated);
600 if (errno != ERANGE) {
601 int saved_errno = errno;
607 if (allocated < PATH_MAX) {
615 char *s = SMB_MALLOC_ARRAY(char, PATH_MAX);
621 int saved_errno = errno;
629 #if defined(HAVE_POSIX_CAPABILITIES)
631 /**************************************************************************
632 Try and abstract process capabilities (for systems that have them).
633 ****************************************************************************/
635 /* Set the POSIX capabilities needed for the given purpose into the effective
636 * capability set of the current process. Make sure they are always removed
637 * from the inheritable set, because there is no circumstance in which our
638 * children should inherit our elevated privileges.
640 static bool set_process_capability(enum smbd_capability capability,
643 cap_value_t cap_vals[2] = {0};
644 int num_cap_vals = 0;
648 #if defined(HAVE_PRCTL) && defined(PR_GET_KEEPCAPS) && defined(PR_SET_KEEPCAPS)
649 /* On Linux, make sure that any capabilities we grab are sticky
650 * across UID changes. We expect that this would allow us to keep both
651 * the effective and permitted capability sets, but as of circa 2.6.16,
652 * only the permitted set is kept. It is a bug (which we work around)
653 * that the effective set is lost, but we still require the effective
656 if (!prctl(PR_GET_KEEPCAPS)) {
657 prctl(PR_SET_KEEPCAPS, 1);
661 cap = cap_get_proc();
663 DEBUG(0,("set_process_capability: cap_get_proc failed: %s\n",
668 switch (capability) {
669 case KERNEL_OPLOCK_CAPABILITY:
670 #ifdef CAP_NETWORK_MGT
671 /* IRIX has CAP_NETWORK_MGT for oplocks. */
672 cap_vals[num_cap_vals++] = CAP_NETWORK_MGT;
675 case DMAPI_ACCESS_CAPABILITY:
676 #ifdef CAP_DEVICE_MGT
677 /* IRIX has CAP_DEVICE_MGT for DMAPI access. */
678 cap_vals[num_cap_vals++] = CAP_DEVICE_MGT;
680 /* Linux has CAP_MKNOD for DMAPI access. */
681 cap_vals[num_cap_vals++] = CAP_MKNOD;
684 case LEASE_CAPABILITY:
686 cap_vals[num_cap_vals++] = CAP_LEASE;
689 case DAC_OVERRIDE_CAPABILITY:
690 #ifdef CAP_DAC_OVERRIDE
691 cap_vals[num_cap_vals++] = CAP_DAC_OVERRIDE;
695 SMB_ASSERT(num_cap_vals <= ARRAY_SIZE(cap_vals));
697 if (num_cap_vals == 0) {
702 cap_set_flag(cap, CAP_EFFECTIVE, num_cap_vals, cap_vals,
703 enable ? CAP_SET : CAP_CLEAR);
705 /* We never want to pass capabilities down to our children, so make
706 * sure they are not inherited.
708 cap_set_flag(cap, CAP_INHERITABLE, num_cap_vals, cap_vals, CAP_CLEAR);
710 if (cap_set_proc(cap) == -1) {
711 DEBUG(0, ("set_process_capability: cap_set_proc failed: %s\n",
721 #endif /* HAVE_POSIX_CAPABILITIES */
723 /****************************************************************************
724 Gain the oplock capability from the kernel if possible.
725 ****************************************************************************/
727 void set_effective_capability(enum smbd_capability capability)
729 #if defined(HAVE_POSIX_CAPABILITIES)
730 set_process_capability(capability, True);
731 #endif /* HAVE_POSIX_CAPABILITIES */
734 void drop_effective_capability(enum smbd_capability capability)
736 #if defined(HAVE_POSIX_CAPABILITIES)
737 set_process_capability(capability, False);
738 #endif /* HAVE_POSIX_CAPABILITIES */
741 /**************************************************************************
742 Wrapper for random().
743 ****************************************************************************/
745 long sys_random(void)
747 #if defined(HAVE_RANDOM)
748 return (long)random();
749 #elif defined(HAVE_RAND)
752 DEBUG(0,("Error - no random function available !\n"));
757 /**************************************************************************
758 Wrapper for srandom().
759 ****************************************************************************/
761 void sys_srandom(unsigned int seed)
763 #if defined(HAVE_SRANDOM)
765 #elif defined(HAVE_SRAND)
768 DEBUG(0,("Error - no srandom function available !\n"));
774 #define NGROUPS_MAX 32 /* Guess... */
777 /**************************************************************************
778 Returns equivalent to NGROUPS_MAX - using sysconf if needed.
779 ****************************************************************************/
783 #if defined(SYSCONF_SC_NGROUPS_MAX)
784 int ret = sysconf(_SC_NGROUPS_MAX);
785 return (ret == -1) ? NGROUPS_MAX : ret;
791 /**************************************************************************
792 Wrap setgroups and getgroups for systems that declare getgroups() as
793 returning an array of gid_t, but actuall return an array of int.
794 ****************************************************************************/
796 #if defined(HAVE_BROKEN_GETGROUPS)
798 #ifdef HAVE_BROKEN_GETGROUPS
804 static int sys_broken_getgroups(int setlen, gid_t *gidset)
810 return getgroups(0, NULL);
814 * Broken case. We need to allocate a
815 * GID_T array of size setlen.
823 if((group_list = SMB_MALLOC_ARRAY(GID_T, setlen)) == NULL) {
824 DEBUG(0,("sys_getgroups: Malloc fail.\n"));
828 if((ngroups = getgroups(setlen, group_list)) < 0) {
829 int saved_errno = errno;
830 SAFE_FREE(group_list);
836 * We're safe here as if ngroups > setlen then
837 * getgroups *must* return EINVAL.
838 * pubs.opengroup.org/onlinepubs/009695399/functions/getgroups.html
841 for(i = 0; i < ngroups; i++)
842 gidset[i] = (gid_t)group_list[i];
844 SAFE_FREE(group_list);
848 static int sys_broken_setgroups(int setlen, gid_t *gidset)
856 if (setlen < 0 || setlen > groups_max()) {
862 * Broken case. We need to allocate a
863 * GID_T array of size setlen.
866 if((group_list = SMB_MALLOC_ARRAY(GID_T, setlen)) == NULL) {
867 DEBUG(0,("sys_setgroups: Malloc fail.\n"));
871 for(i = 0; i < setlen; i++)
872 group_list[i] = (GID_T) gidset[i];
874 if(samba_setgroups(setlen, group_list) != 0) {
875 int saved_errno = errno;
876 SAFE_FREE(group_list);
881 SAFE_FREE(group_list);
885 #endif /* HAVE_BROKEN_GETGROUPS */
887 /* This is a list of systems that require the first GID passed to setgroups(2)
888 * to be the effective GID. If your system is one of these, add it here.
890 #if defined (FREEBSD) || defined (DARWINOS)
891 #define USE_BSD_SETGROUPS
894 #if defined(USE_BSD_SETGROUPS)
895 /* Depending on the particular BSD implementation, the first GID that is
896 * passed to setgroups(2) will either be ignored or will set the credential's
897 * effective GID. In either case, the right thing to do is to guarantee that
898 * gidset[0] is the effective GID.
900 static int sys_bsd_setgroups(gid_t primary_gid, int setlen, const gid_t *gidset)
902 gid_t *new_gidset = NULL;
906 /* setgroups(2) will fail with EINVAL if we pass too many groups. */
909 /* No group list, just make sure we are setting the efective GID. */
911 return samba_setgroups(1, &primary_gid);
914 /* If the primary gid is not the first array element, grow the array
915 * and insert it at the front.
917 if (gidset[0] != primary_gid) {
918 new_gidset = SMB_MALLOC_ARRAY(gid_t, setlen + 1);
919 if (new_gidset == NULL) {
923 memcpy(new_gidset + 1, gidset, (setlen * sizeof(gid_t)));
924 new_gidset[0] = primary_gid;
929 DEBUG(3, ("forced to truncate group list from %d to %d\n",
934 #if defined(HAVE_BROKEN_GETGROUPS)
935 ret = sys_broken_setgroups(setlen, new_gidset ? new_gidset : gidset);
937 ret = samba_setgroups(setlen, new_gidset ? new_gidset : gidset);
942 SAFE_FREE(new_gidset);
949 #endif /* USE_BSD_SETGROUPS */
951 /**************************************************************************
952 Wrapper for getgroups. Deals with broken (int) case.
953 ****************************************************************************/
955 int sys_getgroups(int setlen, gid_t *gidset)
957 #if defined(HAVE_BROKEN_GETGROUPS)
958 return sys_broken_getgroups(setlen, gidset);
960 return getgroups(setlen, gidset);
964 /**************************************************************************
965 Wrapper for setgroups. Deals with broken (int) case and BSD case.
966 ****************************************************************************/
968 int sys_setgroups(gid_t UNUSED(primary_gid), int setlen, gid_t *gidset)
970 #if !defined(HAVE_SETGROUPS)
973 #endif /* HAVE_SETGROUPS */
975 #if defined(USE_BSD_SETGROUPS)
976 return sys_bsd_setgroups(primary_gid, setlen, gidset);
977 #elif defined(HAVE_BROKEN_GETGROUPS)
978 return sys_broken_setgroups(setlen, gidset);
980 return samba_setgroups(setlen, gidset);
984 /****************************************************************************
985 Return the major devicenumber for UNIX extensions.
986 ****************************************************************************/
988 uint32_t unix_dev_major(SMB_DEV_T dev)
990 #if defined(HAVE_DEVICE_MAJOR_FN)
991 return (uint32_t)major(dev);
993 return (uint32_t)(dev >> 8);
997 /****************************************************************************
998 Return the minor devicenumber for UNIX extensions.
999 ****************************************************************************/
1001 uint32_t unix_dev_minor(SMB_DEV_T dev)
1003 #if defined(HAVE_DEVICE_MINOR_FN)
1004 return (uint32_t)minor(dev);
1006 return (uint32_t)(dev & 0xff);
1010 /**************************************************************************
1011 Wrapper for realpath.
1012 ****************************************************************************/
1014 char *sys_realpath(const char *path)
1018 #ifdef REALPATH_TAKES_NULL
1019 result = realpath(path, NULL);
1021 result = SMB_MALLOC_ARRAY(char, PATH_MAX + 1);
1023 char *resolved_path = realpath(path, result);
1024 if (!resolved_path) {
1027 /* SMB_ASSERT(result == resolved_path) ? */
1028 result = resolved_path;
1036 /*******************************************************************
1037 Return the number of CPUs.
1038 ********************************************************************/
1040 int sys_get_number_of_cores(void)
1044 #if defined(HAVE_SYSCONF)
1045 #if defined(_SC_NPROCESSORS_ONLN)
1046 ret = (int)sysconf(_SC_NPROCESSORS_ONLN);
1048 #if defined(_SC_NPROCESSORS_CONF)
1050 ret = (int)sysconf(_SC_NPROCESSORS_CONF);
1053 #elif defined(HAVE_SYSCTL) && defined(CTL_HW)
1055 unsigned int len = sizeof(ret);
1058 #if defined(HW_AVAILCPU)
1059 name[1] = HW_AVAILCPU;
1061 if (sysctl(name, 2, &ret, &len, NULL, 0) == -1) {
1065 #if defined(HW_NCPU)
1069 if (sysctl(nm, 2, &count, &len, NULL, 0) == -1) {