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"
29 #ifdef HAVE_SYS_SYSCTL_H
30 #include <sys/sysctl.h>
33 #ifdef HAVE_SYS_PRCTL_H
34 #include <sys/prctl.h>
38 The idea is that this file will eventually have wrappers around all
39 important system calls in samba. The aims are:
41 - to enable easier porting by putting OS dependent stuff in here
43 - to allow for hooks into other "pseudo-filesystems"
45 - to allow easier integration of things like the japanese extensions
47 - to support the philosophy of Samba to expose the features of
48 the OS within the SMB model. In general whatever file/printer/variable
49 expansions/etc make sense to the OS should be acceptable to Samba.
54 /*******************************************************************
55 A read wrapper that will deal with EINTR.
56 ********************************************************************/
58 ssize_t sys_read(int fd, void *buf, size_t count)
63 ret = read(fd, buf, count);
64 #if defined(EWOULDBLOCK)
65 } while (ret == -1 && (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK));
67 } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
72 /*******************************************************************
73 A write wrapper that will deal with EINTR.
74 ********************************************************************/
76 ssize_t sys_write(int fd, const void *buf, size_t count)
81 ret = write(fd, buf, count);
82 #if defined(EWOULDBLOCK)
83 } while (ret == -1 && (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK));
85 } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
90 /*******************************************************************
91 A writev wrapper that will deal with EINTR.
92 ********************************************************************/
94 ssize_t sys_writev(int fd, const struct iovec *iov, int iovcnt)
99 /* Try to confuse write_data_iov a bit */
100 if ((random() % 5) == 0) {
101 return sys_write(fd, iov[0].iov_base, iov[0].iov_len);
103 if (iov[0].iov_len > 1) {
104 return sys_write(fd, iov[0].iov_base,
105 (random() % (iov[0].iov_len-1)) + 1);
110 ret = writev(fd, iov, iovcnt);
111 #if defined(EWOULDBLOCK)
112 } while (ret == -1 && (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK));
114 } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
119 /*******************************************************************
120 A pread wrapper that will deal with EINTR
121 ********************************************************************/
123 #if defined(HAVE_PREAD)
124 ssize_t sys_pread(int fd, void *buf, size_t count, off_t off)
129 ret = pread(fd, buf, count, off);
130 } while (ret == -1 && errno == EINTR);
135 /*******************************************************************
136 A write wrapper that will deal with EINTR
137 ********************************************************************/
139 #if defined(HAVE_PWRITE)
140 ssize_t sys_pwrite(int fd, const void *buf, size_t count, off_t off)
145 ret = pwrite(fd, buf, count, off);
146 } while (ret == -1 && errno == EINTR);
151 /*******************************************************************
152 A send wrapper that will deal with EINTR or EAGAIN or EWOULDBLOCK.
153 ********************************************************************/
155 ssize_t sys_send(int s, const void *msg, size_t len, int flags)
160 ret = send(s, msg, len, flags);
161 #if defined(EWOULDBLOCK)
162 } while (ret == -1 && (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK));
164 } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
169 /*******************************************************************
170 A recvfrom wrapper that will deal with EINTR.
171 ********************************************************************/
173 ssize_t sys_recvfrom(int s, void *buf, size_t len, int flags, struct sockaddr *from, socklen_t *fromlen)
178 ret = recvfrom(s, buf, len, flags, from, fromlen);
179 #if defined(EWOULDBLOCK)
180 } while (ret == -1 && (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK));
182 } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
187 /*******************************************************************
188 A fcntl wrapper that will deal with EINTR.
189 ********************************************************************/
191 int sys_fcntl_ptr(int fd, int cmd, void *arg)
196 ret = fcntl(fd, cmd, arg);
197 } while (ret == -1 && errno == EINTR);
201 /****************************************************************************
202 Get/Set all the possible time fields from a stat struct as a timespec.
203 ****************************************************************************/
205 static struct timespec get_atimespec(const struct stat *pst)
207 #if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
210 /* Old system - no ns timestamp. */
211 ret.tv_sec = pst->st_atime;
215 #if defined(HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC)
217 #elif defined(HAVE_STRUCT_STAT_ST_MTIMENSEC)
219 ret.tv_sec = pst->st_atime;
220 ret.tv_nsec = pst->st_atimensec;
222 #elif defined(HAVE_STRUCT_STAT_ST_MTIME_N)
224 ret.tv_sec = pst->st_atime;
225 ret.tv_nsec = pst->st_atime_n;
227 #elif defined(HAVE_STRUCT_STAT_ST_UMTIME)
229 ret.tv_sec = pst->st_atime;
230 ret.tv_nsec = pst->st_uatime * 1000;
232 #elif defined(HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC)
233 return pst->st_atimespec;
235 #error CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
240 static struct timespec get_mtimespec(const struct stat *pst)
242 #if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
245 /* Old system - no ns timestamp. */
246 ret.tv_sec = pst->st_mtime;
250 #if defined(HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC)
252 #elif defined(HAVE_STRUCT_STAT_ST_MTIMENSEC)
254 ret.tv_sec = pst->st_mtime;
255 ret.tv_nsec = pst->st_mtimensec;
257 #elif defined(HAVE_STRUCT_STAT_ST_MTIME_N)
259 ret.tv_sec = pst->st_mtime;
260 ret.tv_nsec = pst->st_mtime_n;
262 #elif defined(HAVE_STRUCT_STAT_ST_UMTIME)
264 ret.tv_sec = pst->st_mtime;
265 ret.tv_nsec = pst->st_umtime * 1000;
267 #elif defined(HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC)
268 return pst->st_mtimespec;
270 #error CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
275 static struct timespec get_ctimespec(const struct stat *pst)
277 #if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
280 /* Old system - no ns timestamp. */
281 ret.tv_sec = pst->st_ctime;
285 #if defined(HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC)
287 #elif defined(HAVE_STRUCT_STAT_ST_MTIMENSEC)
289 ret.tv_sec = pst->st_ctime;
290 ret.tv_nsec = pst->st_ctimensec;
292 #elif defined(HAVE_STRUCT_STAT_ST_MTIME_N)
294 ret.tv_sec = pst->st_ctime;
295 ret.tv_nsec = pst->st_ctime_n;
297 #elif defined(HAVE_STRUCT_STAT_ST_UMTIME)
299 ret.tv_sec = pst->st_ctime;
300 ret.tv_nsec = pst->st_uctime * 1000;
302 #elif defined(HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC)
303 return pst->st_ctimespec;
305 #error CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
310 /****************************************************************************
311 Return the best approximation to a 'create time' under UNIX from a stat
313 ****************************************************************************/
315 static struct timespec calc_create_time_stat(const struct stat *st)
317 struct timespec ret, ret1;
318 struct timespec c_time = get_ctimespec(st);
319 struct timespec m_time = get_mtimespec(st);
320 struct timespec a_time = get_atimespec(st);
322 ret = timespec_compare(&c_time, &m_time) < 0 ? c_time : m_time;
323 ret1 = timespec_compare(&ret, &a_time) < 0 ? ret : a_time;
325 if(!null_timespec(ret1)) {
330 * One of ctime, mtime or atime was zero (probably atime).
331 * Just return MIN(ctime, mtime).
336 /****************************************************************************
337 Return the best approximation to a 'create time' under UNIX from a stat_ex
339 ****************************************************************************/
341 static struct timespec calc_create_time_stat_ex(const struct stat_ex *st)
343 struct timespec ret, ret1;
344 struct timespec c_time = st->st_ex_ctime;
345 struct timespec m_time = st->st_ex_mtime;
346 struct timespec a_time = st->st_ex_atime;
348 ret = timespec_compare(&c_time, &m_time) < 0 ? c_time : m_time;
349 ret1 = timespec_compare(&ret, &a_time) < 0 ? ret : a_time;
351 if(!null_timespec(ret1)) {
356 * One of ctime, mtime or atime was zero (probably atime).
357 * Just return MIN(ctime, mtime).
362 /****************************************************************************
363 Return the 'create time' from a stat struct if it exists (birthtime) or else
364 use the best approximation.
365 ****************************************************************************/
367 static void make_create_timespec(const struct stat *pst, struct stat_ex *dst,
368 bool fake_dir_create_times)
370 if (S_ISDIR(pst->st_mode) && fake_dir_create_times) {
371 dst->st_ex_btime.tv_sec = 315493200L; /* 1/1/1980 */
372 dst->st_ex_btime.tv_nsec = 0;
375 dst->st_ex_calculated_birthtime = false;
377 #if defined(HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC)
378 dst->st_ex_btime = pst->st_birthtimespec;
379 #elif defined(HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC)
380 dst->st_ex_btime.tv_sec = pst->st_birthtime;
381 dst->st_ex_btime.tv_nsec = pst->st_birthtimenspec;
382 #elif defined(HAVE_STRUCT_STAT_ST_BIRTHTIME)
383 dst->st_ex_btime.tv_sec = pst->st_birthtime;
384 dst->st_ex_btime.tv_nsec = 0;
386 dst->st_ex_btime = calc_create_time_stat(pst);
387 dst->st_ex_calculated_birthtime = true;
390 /* Deal with systems that don't initialize birthtime correctly.
391 * Pointed out by SATOH Fumiyasu <fumiyas@osstech.jp>.
393 if (null_timespec(dst->st_ex_btime)) {
394 dst->st_ex_btime = calc_create_time_stat(pst);
395 dst->st_ex_calculated_birthtime = true;
399 /****************************************************************************
400 If we update a timestamp in a stat_ex struct we may have to recalculate
401 the birthtime. For now only implement this for write time, but we may
402 also need to do it for atime and ctime. JRA.
403 ****************************************************************************/
405 void update_stat_ex_mtime(struct stat_ex *dst,
406 struct timespec write_ts)
408 dst->st_ex_mtime = write_ts;
410 /* We may have to recalculate btime. */
411 if (dst->st_ex_calculated_birthtime) {
412 dst->st_ex_btime = calc_create_time_stat_ex(dst);
416 void update_stat_ex_create_time(struct stat_ex *dst,
417 struct timespec create_time)
419 dst->st_ex_btime = create_time;
420 dst->st_ex_calculated_birthtime = false;
423 void init_stat_ex_from_stat (struct stat_ex *dst,
424 const struct stat *src,
425 bool fake_dir_create_times)
427 dst->st_ex_dev = src->st_dev;
428 dst->st_ex_ino = src->st_ino;
429 dst->st_ex_mode = src->st_mode;
430 dst->st_ex_nlink = src->st_nlink;
431 dst->st_ex_uid = src->st_uid;
432 dst->st_ex_gid = src->st_gid;
433 dst->st_ex_rdev = src->st_rdev;
434 dst->st_ex_size = src->st_size;
435 dst->st_ex_atime = get_atimespec(src);
436 dst->st_ex_mtime = get_mtimespec(src);
437 dst->st_ex_ctime = get_ctimespec(src);
438 make_create_timespec(src, dst, fake_dir_create_times);
439 #ifdef HAVE_STAT_ST_BLKSIZE
440 dst->st_ex_blksize = src->st_blksize;
442 dst->st_ex_blksize = STAT_ST_BLOCKSIZE;
445 #ifdef HAVE_STAT_ST_BLOCKS
446 dst->st_ex_blocks = src->st_blocks;
448 dst->st_ex_blocks = src->st_size / dst->st_ex_blksize + 1;
451 #ifdef HAVE_STAT_ST_FLAGS
452 dst->st_ex_flags = src->st_flags;
454 dst->st_ex_flags = 0;
458 /*******************************************************************
460 ********************************************************************/
462 int sys_stat(const char *fname, SMB_STRUCT_STAT *sbuf,
463 bool fake_dir_create_times)
467 ret = stat(fname, &statbuf);
469 /* we always want directories to appear zero size */
470 if (S_ISDIR(statbuf.st_mode)) {
473 init_stat_ex_from_stat(sbuf, &statbuf, fake_dir_create_times);
478 /*******************************************************************
480 ********************************************************************/
482 int sys_fstat(int fd, SMB_STRUCT_STAT *sbuf, bool fake_dir_create_times)
486 ret = fstat(fd, &statbuf);
488 /* we always want directories to appear zero size */
489 if (S_ISDIR(statbuf.st_mode)) {
492 init_stat_ex_from_stat(sbuf, &statbuf, fake_dir_create_times);
497 /*******************************************************************
499 ********************************************************************/
501 int sys_lstat(const char *fname,SMB_STRUCT_STAT *sbuf,
502 bool fake_dir_create_times)
506 ret = lstat(fname, &statbuf);
508 /* we always want directories to appear zero size */
509 if (S_ISDIR(statbuf.st_mode)) {
512 init_stat_ex_from_stat(sbuf, &statbuf, fake_dir_create_times);
517 /*******************************************************************
518 An posix_fallocate() wrapper.
519 ********************************************************************/
520 int sys_posix_fallocate(int fd, off_t offset, off_t len)
522 #if defined(HAVE_POSIX_FALLOCATE) && !defined(HAVE_BROKEN_POSIX_FALLOCATE)
523 return posix_fallocate(fd, offset, len);
524 #elif defined(F_RESVSP64)
525 /* this handles XFS on IRIX */
527 off_t new_len = offset + len;
531 /* unlikely to get a too large file on a 64bit system but ... */
535 fl.l_whence = SEEK_SET;
539 ret=fcntl(fd, F_RESVSP64, &fl);
544 /* Make sure the file gets enlarged after we allocated space: */
546 if (new_len > sbuf.st_size)
547 ftruncate64(fd, new_len);
554 /*******************************************************************
555 An fallocate() function that matches the semantics of the Linux one.
556 ********************************************************************/
558 #ifdef HAVE_LINUX_FALLOC_H
559 #include <linux/falloc.h>
562 int sys_fallocate(int fd, enum vfs_fallocate_mode mode, off_t offset, off_t len)
564 #if defined(HAVE_LINUX_FALLOCATE64) || defined(HAVE_LINUX_FALLOCATE)
567 case VFS_FALLOCATE_EXTEND_SIZE:
570 case VFS_FALLOCATE_KEEP_SIZE:
571 lmode = FALLOC_FL_KEEP_SIZE;
577 #if defined(HAVE_LINUX_FALLOCATE)
578 return fallocate(fd, lmode, offset, len);
581 /* TODO - plumb in fallocate from other filesysetms like VXFS etc. JRA. */
587 #if HAVE_KERNEL_SHARE_MODES
589 #define LOCK_MAND 32 /* This is a mandatory flock */
590 #define LOCK_READ 64 /* ... Which allows concurrent read operations */
591 #define LOCK_WRITE 128 /* ... Which allows concurrent write operations */
592 #define LOCK_RW 192 /* ... Which allows concurrent read & write ops */
596 /*******************************************************************
597 A flock() wrapper that will perform the kernel flock.
598 ********************************************************************/
600 void kernel_flock(int fd, uint32 share_mode, uint32 access_mask)
602 #if HAVE_KERNEL_SHARE_MODES
604 if (share_mode == FILE_SHARE_WRITE) {
605 kernel_mode = LOCK_MAND|LOCK_WRITE;
606 } else if (share_mode == FILE_SHARE_READ) {
607 kernel_mode = LOCK_MAND|LOCK_READ;
608 } else if (share_mode == FILE_SHARE_NONE) {
609 kernel_mode = LOCK_MAND;
612 flock(fd, kernel_mode);
620 /*******************************************************************
621 An fdopendir wrapper.
622 Ugly hack - we need dirfd for this to work correctly in the
624 ********************************************************************/
626 DIR *sys_fdopendir(int fd)
628 #if defined(HAVE_FDOPENDIR) && defined(HAVE_DIRFD)
629 return fdopendir(fd);
636 /*******************************************************************
638 ********************************************************************/
640 int sys_mknod(const char *path, mode_t mode, SMB_DEV_T dev)
642 #if defined(HAVE_MKNOD)
643 return mknod(path, mode, dev);
645 /* No mknod system call. */
651 /*******************************************************************
652 The wait() calls vary between systems
653 ********************************************************************/
655 int sys_waitpid(pid_t pid,int *status,int options)
658 return waitpid(pid,status,options);
659 #else /* HAVE_WAITPID */
660 return wait4(pid, status, options, NULL);
661 #endif /* HAVE_WAITPID */
664 /*******************************************************************
665 System wrapper for getwd. Always returns MALLOC'ed memory, or NULL
666 on error (malloc fail usually).
667 ********************************************************************/
669 char *sys_getwd(void)
671 #ifdef GETCWD_TAKES_NULL
672 return getcwd(NULL, 0);
674 char *wd = NULL, *s = NULL;
675 size_t allocated = PATH_MAX;
678 s = SMB_REALLOC_ARRAY(s, char, allocated);
682 wd = getcwd(s, allocated);
686 if (errno != ERANGE) {
691 if (allocated < PATH_MAX) {
698 char *s = SMB_MALLOC_ARRAY(char, PATH_MAX);
706 #if defined(HAVE_POSIX_CAPABILITIES)
708 /**************************************************************************
709 Try and abstract process capabilities (for systems that have them).
710 ****************************************************************************/
712 /* Set the POSIX capabilities needed for the given purpose into the effective
713 * capability set of the current process. Make sure they are always removed
714 * from the inheritable set, because there is no circumstance in which our
715 * children should inherit our elevated privileges.
717 static bool set_process_capability(enum smbd_capability capability,
720 cap_value_t cap_vals[2] = {0};
721 int num_cap_vals = 0;
725 #if defined(HAVE_PRCTL) && defined(PR_GET_KEEPCAPS) && defined(PR_SET_KEEPCAPS)
726 /* On Linux, make sure that any capabilities we grab are sticky
727 * across UID changes. We expect that this would allow us to keep both
728 * the effective and permitted capability sets, but as of circa 2.6.16,
729 * only the permitted set is kept. It is a bug (which we work around)
730 * that the effective set is lost, but we still require the effective
733 if (!prctl(PR_GET_KEEPCAPS)) {
734 prctl(PR_SET_KEEPCAPS, 1);
738 cap = cap_get_proc();
740 DEBUG(0,("set_process_capability: cap_get_proc failed: %s\n",
745 switch (capability) {
746 case KERNEL_OPLOCK_CAPABILITY:
747 #ifdef CAP_NETWORK_MGT
748 /* IRIX has CAP_NETWORK_MGT for oplocks. */
749 cap_vals[num_cap_vals++] = CAP_NETWORK_MGT;
752 case DMAPI_ACCESS_CAPABILITY:
753 #ifdef CAP_DEVICE_MGT
754 /* IRIX has CAP_DEVICE_MGT for DMAPI access. */
755 cap_vals[num_cap_vals++] = CAP_DEVICE_MGT;
757 /* Linux has CAP_MKNOD for DMAPI access. */
758 cap_vals[num_cap_vals++] = CAP_MKNOD;
761 case LEASE_CAPABILITY:
763 cap_vals[num_cap_vals++] = CAP_LEASE;
768 SMB_ASSERT(num_cap_vals <= ARRAY_SIZE(cap_vals));
770 if (num_cap_vals == 0) {
775 cap_set_flag(cap, CAP_EFFECTIVE, num_cap_vals, cap_vals,
776 enable ? CAP_SET : CAP_CLEAR);
778 /* We never want to pass capabilities down to our children, so make
779 * sure they are not inherited.
781 cap_set_flag(cap, CAP_INHERITABLE, num_cap_vals, cap_vals, CAP_CLEAR);
783 if (cap_set_proc(cap) == -1) {
784 DEBUG(0, ("set_process_capability: cap_set_proc failed: %s\n",
794 #endif /* HAVE_POSIX_CAPABILITIES */
796 /****************************************************************************
797 Gain the oplock capability from the kernel if possible.
798 ****************************************************************************/
800 void set_effective_capability(enum smbd_capability capability)
802 #if defined(HAVE_POSIX_CAPABILITIES)
803 set_process_capability(capability, True);
804 #endif /* HAVE_POSIX_CAPABILITIES */
807 void drop_effective_capability(enum smbd_capability capability)
809 #if defined(HAVE_POSIX_CAPABILITIES)
810 set_process_capability(capability, False);
811 #endif /* HAVE_POSIX_CAPABILITIES */
814 /**************************************************************************
815 Wrapper for random().
816 ****************************************************************************/
818 long sys_random(void)
820 #if defined(HAVE_RANDOM)
821 return (long)random();
822 #elif defined(HAVE_RAND)
825 DEBUG(0,("Error - no random function available !\n"));
830 /**************************************************************************
831 Wrapper for srandom().
832 ****************************************************************************/
834 void sys_srandom(unsigned int seed)
836 #if defined(HAVE_SRANDOM)
838 #elif defined(HAVE_SRAND)
841 DEBUG(0,("Error - no srandom function available !\n"));
847 #define NGROUPS_MAX 32 /* Guess... */
850 /**************************************************************************
851 Returns equivalent to NGROUPS_MAX - using sysconf if needed.
852 ****************************************************************************/
856 #if defined(SYSCONF_SC_NGROUPS_MAX)
857 int ret = sysconf(_SC_NGROUPS_MAX);
858 return (ret == -1) ? NGROUPS_MAX : ret;
864 /**************************************************************************
865 Wrap setgroups and getgroups for systems that declare getgroups() as
866 returning an array of gid_t, but actuall return an array of int.
867 ****************************************************************************/
869 #if defined(HAVE_BROKEN_GETGROUPS)
871 #ifdef HAVE_BROKEN_GETGROUPS
877 static int sys_broken_getgroups(int setlen, gid_t *gidset)
884 return getgroups(setlen, &gid);
888 * Broken case. We need to allocate a
889 * GID_T array of size setlen.
898 setlen = groups_max();
900 if((group_list = SMB_MALLOC_ARRAY(GID_T, setlen)) == NULL) {
901 DEBUG(0,("sys_getgroups: Malloc fail.\n"));
905 if((ngroups = getgroups(setlen, group_list)) < 0) {
906 int saved_errno = errno;
907 SAFE_FREE(group_list);
912 for(i = 0; i < ngroups; i++)
913 gidset[i] = (gid_t)group_list[i];
915 SAFE_FREE(group_list);
919 static int sys_broken_setgroups(int setlen, gid_t *gidset)
927 if (setlen < 0 || setlen > groups_max()) {
933 * Broken case. We need to allocate a
934 * GID_T array of size setlen.
937 if((group_list = SMB_MALLOC_ARRAY(GID_T, setlen)) == NULL) {
938 DEBUG(0,("sys_setgroups: Malloc fail.\n"));
942 for(i = 0; i < setlen; i++)
943 group_list[i] = (GID_T) gidset[i];
945 if(setgroups(setlen, group_list) != 0) {
946 int saved_errno = errno;
947 SAFE_FREE(group_list);
952 SAFE_FREE(group_list);
956 #endif /* HAVE_BROKEN_GETGROUPS */
958 /* This is a list of systems that require the first GID passed to setgroups(2)
959 * to be the effective GID. If your system is one of these, add it here.
961 #if defined (FREEBSD) || defined (DARWINOS)
962 #define USE_BSD_SETGROUPS
965 #if defined(USE_BSD_SETGROUPS)
966 /* Depending on the particular BSD implementation, the first GID that is
967 * passed to setgroups(2) will either be ignored or will set the credential's
968 * effective GID. In either case, the right thing to do is to guarantee that
969 * gidset[0] is the effective GID.
971 static int sys_bsd_setgroups(gid_t primary_gid, int setlen, const gid_t *gidset)
973 gid_t *new_gidset = NULL;
977 /* setgroups(2) will fail with EINVAL if we pass too many groups. */
980 /* No group list, just make sure we are setting the efective GID. */
982 return setgroups(1, &primary_gid);
985 /* If the primary gid is not the first array element, grow the array
986 * and insert it at the front.
988 if (gidset[0] != primary_gid) {
989 new_gidset = SMB_MALLOC_ARRAY(gid_t, setlen + 1);
990 if (new_gidset == NULL) {
994 memcpy(new_gidset + 1, gidset, (setlen * sizeof(gid_t)));
995 new_gidset[0] = primary_gid;
1000 DEBUG(3, ("forced to truncate group list from %d to %d\n",
1005 #if defined(HAVE_BROKEN_GETGROUPS)
1006 ret = sys_broken_setgroups(setlen, new_gidset ? new_gidset : gidset);
1008 ret = setgroups(setlen, new_gidset ? new_gidset : gidset);
1013 SAFE_FREE(new_gidset);
1020 #endif /* USE_BSD_SETGROUPS */
1022 /**************************************************************************
1023 Wrapper for getgroups. Deals with broken (int) case.
1024 ****************************************************************************/
1026 int sys_getgroups(int setlen, gid_t *gidset)
1028 #if defined(HAVE_BROKEN_GETGROUPS)
1029 return sys_broken_getgroups(setlen, gidset);
1031 return getgroups(setlen, gidset);
1035 /**************************************************************************
1036 Wrapper for setgroups. Deals with broken (int) case and BSD case.
1037 ****************************************************************************/
1039 int sys_setgroups(gid_t UNUSED(primary_gid), int setlen, gid_t *gidset)
1041 #if !defined(HAVE_SETGROUPS)
1044 #endif /* HAVE_SETGROUPS */
1046 #if defined(USE_BSD_SETGROUPS)
1047 return sys_bsd_setgroups(primary_gid, setlen, gidset);
1048 #elif defined(HAVE_BROKEN_GETGROUPS)
1049 return sys_broken_setgroups(setlen, gidset);
1051 return setgroups(setlen, gidset);
1055 /**************************************************************************
1056 Extract a command into an arg list.
1057 ****************************************************************************/
1059 static char **extract_args(TALLOC_CTX *mem_ctx, const char *command)
1068 if (!(trunc_cmd = talloc_strdup(mem_ctx, command))) {
1069 DEBUG(0, ("talloc failed\n"));
1073 if(!(ptr = strtok_r(trunc_cmd, " \t", &saveptr))) {
1074 TALLOC_FREE(trunc_cmd);
1083 for( argcl = 1; ptr; ptr = strtok_r(NULL, " \t", &saveptr))
1086 TALLOC_FREE(trunc_cmd);
1088 if (!(argl = talloc_array(mem_ctx, char *, argcl + 1))) {
1093 * Now do the extraction.
1096 if (!(trunc_cmd = talloc_strdup(mem_ctx, command))) {
1100 ptr = strtok_r(trunc_cmd, " \t", &saveptr);
1103 if (!(argl[i++] = talloc_strdup(argl, ptr))) {
1107 while((ptr = strtok_r(NULL, " \t", &saveptr)) != NULL) {
1109 if (!(argl[i++] = talloc_strdup(argl, ptr))) {
1115 TALLOC_FREE(trunc_cmd);
1119 DEBUG(0, ("talloc failed\n"));
1120 TALLOC_FREE(trunc_cmd);
1126 /**************************************************************************
1127 Wrapper for popen. Safer as it doesn't search a path.
1128 Modified from the glibc sources.
1129 modified by tridge to return a file descriptor. We must kick our FILE* habit
1130 ****************************************************************************/
1132 typedef struct _popen_list
1136 struct _popen_list *next;
1139 static popen_list *popen_chain;
1141 int sys_popen(const char *command)
1143 int parent_end, child_end;
1145 popen_list *entry = NULL;
1148 if (pipe(pipe_fds) < 0)
1151 parent_end = pipe_fds[0];
1152 child_end = pipe_fds[1];
1159 if((entry = SMB_MALLOC_P(popen_list)) == NULL)
1162 ZERO_STRUCTP(entry);
1165 * Extract the command and args into a NULL terminated array.
1168 if(!(argl = extract_args(NULL, command)))
1171 entry->child_pid = fork();
1173 if (entry->child_pid == -1) {
1177 if (entry->child_pid == 0) {
1183 int child_std_end = STDOUT_FILENO;
1187 if (child_end != child_std_end) {
1188 dup2 (child_end, child_std_end);
1193 * POSIX.2: "popen() shall ensure that any streams from previous
1194 * popen() calls that remain open in the parent process are closed
1195 * in the new child process."
1198 for (p = popen_chain; p; p = p->next)
1201 execv(argl[0], argl);
1212 /* Link into popen_chain. */
1213 entry->next = popen_chain;
1214 popen_chain = entry;
1215 entry->fd = parent_end;
1228 /**************************************************************************
1229 Wrapper for pclose. Modified from the glibc sources.
1230 ****************************************************************************/
1232 int sys_pclose(int fd)
1235 popen_list **ptr = &popen_chain;
1236 popen_list *entry = NULL;
1240 /* Unlink from popen_chain. */
1241 for ( ; *ptr != NULL; ptr = &(*ptr)->next) {
1242 if ((*ptr)->fd == fd) {
1244 *ptr = (*ptr)->next;
1250 if (status < 0 || close(entry->fd) < 0)
1254 * As Samba is catching and eating child process
1255 * exits we don't really care about the child exit
1256 * code, a -1 with errno = ECHILD will do fine for us.
1260 wait_pid = sys_waitpid (entry->child_pid, &wstatus, 0);
1261 } while (wait_pid == -1 && errno == EINTR);
1270 /**************************************************************************
1271 Wrapper for Admin Logs.
1272 ****************************************************************************/
1274 void sys_adminlog(int priority, const char *format_str, ...)
1278 char *msgbuf = NULL;
1280 va_start( ap, format_str );
1281 ret = vasprintf( &msgbuf, format_str, ap );
1287 #if defined(HAVE_SYSLOG)
1288 syslog( priority, "%s", msgbuf );
1290 DEBUG(0,("%s", msgbuf ));
1295 /****************************************************************************
1296 Return the major devicenumber for UNIX extensions.
1297 ****************************************************************************/
1299 uint32 unix_dev_major(SMB_DEV_T dev)
1301 #if defined(HAVE_DEVICE_MAJOR_FN)
1302 return (uint32)major(dev);
1304 return (uint32)(dev >> 8);
1308 /****************************************************************************
1309 Return the minor devicenumber for UNIX extensions.
1310 ****************************************************************************/
1312 uint32 unix_dev_minor(SMB_DEV_T dev)
1314 #if defined(HAVE_DEVICE_MINOR_FN)
1315 return (uint32)minor(dev);
1317 return (uint32)(dev & 0xff);
1322 /*******************************************************************
1323 Return the number of CPUs.
1324 ********************************************************************/
1326 int sys_get_number_of_cores(void)
1330 #if defined(HAVE_SYSCONF)
1331 #if defined(_SC_NPROCESSORS_ONLN)
1332 ret = (int)sysconf(_SC_NPROCESSORS_ONLN);
1334 #if defined(_SC_NPROCESSORS_CONF)
1336 ret = (int)sysconf(_SC_NPROCESSORS_CONF);
1339 #elif defined(HAVE_SYSCTL) && defined(CTL_HW)
1341 unsigned int len = sizeof(ret);
1344 #if defined(HW_AVAILCPU)
1345 name[1] = HW_AVAILCPU;
1347 if (sysctl(name, 2, &ret, &len, NULL, 0) == -1) {
1351 #if defined(HW_NCPU)
1355 if (sysctl(nm, 2, &count, &len, NULL, 0) == -1) {
1368 #if defined(HAVE_AIO)
1370 /*******************************************************************
1371 An aio_read wrapper.
1372 ********************************************************************/
1374 int sys_aio_read(SMB_STRUCT_AIOCB *aiocb)
1376 #if defined(HAVE_AIO_READ)
1377 return aio_read(aiocb);
1384 /*******************************************************************
1385 An aio_write wrapper.
1386 ********************************************************************/
1388 int sys_aio_write(SMB_STRUCT_AIOCB *aiocb)
1390 #if defined(HAVE_AIO_WRITE)
1391 return aio_write(aiocb);
1398 /*******************************************************************
1399 An aio_return wrapper.
1400 ********************************************************************/
1402 ssize_t sys_aio_return(SMB_STRUCT_AIOCB *aiocb)
1404 #if defined(HAVE_AIO_RETURN)
1405 return aio_return(aiocb);
1412 /*******************************************************************
1413 An aio_cancel wrapper.
1414 ********************************************************************/
1416 int sys_aio_cancel(int fd, SMB_STRUCT_AIOCB *aiocb)
1418 #if defined(HAVE_AIO_CANCEL)
1419 return aio_cancel(fd, aiocb);
1426 /*******************************************************************
1427 An aio_error wrapper.
1428 ********************************************************************/
1430 int sys_aio_error(const SMB_STRUCT_AIOCB *aiocb)
1432 #if defined(HAVE_AIO_ERROR)
1433 return aio_error(aiocb);
1440 /*******************************************************************
1441 An aio_fsync wrapper.
1442 ********************************************************************/
1444 int sys_aio_fsync(int op, SMB_STRUCT_AIOCB *aiocb)
1446 #if defined(HAVE_AIO_FSYNC)
1447 return aio_fsync(op, aiocb);
1454 /*******************************************************************
1455 An aio_fsync wrapper.
1456 ********************************************************************/
1458 int sys_aio_suspend(const SMB_STRUCT_AIOCB * const cblist[], int n, const struct timespec *timeout)
1460 #if defined(HAVE_AIO_FSYNC)
1461 return aio_suspend(cblist, n, timeout);
1467 #else /* !HAVE_AIO */
1469 int sys_aio_read(SMB_STRUCT_AIOCB *aiocb)
1475 int sys_aio_write(SMB_STRUCT_AIOCB *aiocb)
1481 ssize_t sys_aio_return(SMB_STRUCT_AIOCB *aiocb)
1487 int sys_aio_cancel(int fd, SMB_STRUCT_AIOCB *aiocb)
1493 int sys_aio_error(const SMB_STRUCT_AIOCB *aiocb)
1499 int sys_aio_fsync(int op, SMB_STRUCT_AIOCB *aiocb)
1505 int sys_aio_suspend(const SMB_STRUCT_AIOCB * const cblist[], int n, const struct timespec *timeout)
1510 #endif /* HAVE_AIO */