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 A fcntl wrapper that will deal with EINTR.
203 ********************************************************************/
205 int sys_fcntl_long(int fd
, int cmd
, long arg
)
210 ret
= fcntl(fd
, cmd
, arg
);
211 } while (ret
== -1 && errno
== EINTR
);
215 /****************************************************************************
216 Get/Set all the possible time fields from a stat struct as a timespec.
217 ****************************************************************************/
219 static struct timespec
get_atimespec(const struct stat
*pst
)
221 #if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
224 /* Old system - no ns timestamp. */
225 ret
.tv_sec
= pst
->st_atime
;
229 #if defined(HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC)
231 #elif defined(HAVE_STRUCT_STAT_ST_MTIMENSEC)
233 ret
.tv_sec
= pst
->st_atime
;
234 ret
.tv_nsec
= pst
->st_atimensec
;
236 #elif defined(HAVE_STRUCT_STAT_ST_MTIME_N)
238 ret
.tv_sec
= pst
->st_atime
;
239 ret
.tv_nsec
= pst
->st_atime_n
;
241 #elif defined(HAVE_STRUCT_STAT_ST_UMTIME)
243 ret
.tv_sec
= pst
->st_atime
;
244 ret
.tv_nsec
= pst
->st_uatime
* 1000;
246 #elif defined(HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC)
247 return pst
->st_atimespec
;
249 #error CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
254 static struct timespec
get_mtimespec(const struct stat
*pst
)
256 #if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
259 /* Old system - no ns timestamp. */
260 ret
.tv_sec
= pst
->st_mtime
;
264 #if defined(HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC)
266 #elif defined(HAVE_STRUCT_STAT_ST_MTIMENSEC)
268 ret
.tv_sec
= pst
->st_mtime
;
269 ret
.tv_nsec
= pst
->st_mtimensec
;
271 #elif defined(HAVE_STRUCT_STAT_ST_MTIME_N)
273 ret
.tv_sec
= pst
->st_mtime
;
274 ret
.tv_nsec
= pst
->st_mtime_n
;
276 #elif defined(HAVE_STRUCT_STAT_ST_UMTIME)
278 ret
.tv_sec
= pst
->st_mtime
;
279 ret
.tv_nsec
= pst
->st_umtime
* 1000;
281 #elif defined(HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC)
282 return pst
->st_mtimespec
;
284 #error CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
289 static struct timespec
get_ctimespec(const struct stat
*pst
)
291 #if !defined(HAVE_STAT_HIRES_TIMESTAMPS)
294 /* Old system - no ns timestamp. */
295 ret
.tv_sec
= pst
->st_ctime
;
299 #if defined(HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC)
301 #elif defined(HAVE_STRUCT_STAT_ST_MTIMENSEC)
303 ret
.tv_sec
= pst
->st_ctime
;
304 ret
.tv_nsec
= pst
->st_ctimensec
;
306 #elif defined(HAVE_STRUCT_STAT_ST_MTIME_N)
308 ret
.tv_sec
= pst
->st_ctime
;
309 ret
.tv_nsec
= pst
->st_ctime_n
;
311 #elif defined(HAVE_STRUCT_STAT_ST_UMTIME)
313 ret
.tv_sec
= pst
->st_ctime
;
314 ret
.tv_nsec
= pst
->st_uctime
* 1000;
316 #elif defined(HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC)
317 return pst
->st_ctimespec
;
319 #error CONFIGURE_ERROR_IN_DETECTING_TIMESPEC_IN_STAT
324 /****************************************************************************
325 Return the best approximation to a 'create time' under UNIX from a stat
327 ****************************************************************************/
329 static struct timespec
calc_create_time_stat(const struct stat
*st
)
331 struct timespec ret
, ret1
;
332 struct timespec c_time
= get_ctimespec(st
);
333 struct timespec m_time
= get_mtimespec(st
);
334 struct timespec a_time
= get_atimespec(st
);
336 ret
= timespec_compare(&c_time
, &m_time
) < 0 ? c_time
: m_time
;
337 ret1
= timespec_compare(&ret
, &a_time
) < 0 ? ret
: a_time
;
339 if(!null_timespec(ret1
)) {
344 * One of ctime, mtime or atime was zero (probably atime).
345 * Just return MIN(ctime, mtime).
350 /****************************************************************************
351 Return the best approximation to a 'create time' under UNIX from a stat_ex
353 ****************************************************************************/
355 static struct timespec
calc_create_time_stat_ex(const struct stat_ex
*st
)
357 struct timespec ret
, ret1
;
358 struct timespec c_time
= st
->st_ex_ctime
;
359 struct timespec m_time
= st
->st_ex_mtime
;
360 struct timespec a_time
= st
->st_ex_atime
;
362 ret
= timespec_compare(&c_time
, &m_time
) < 0 ? c_time
: m_time
;
363 ret1
= timespec_compare(&ret
, &a_time
) < 0 ? ret
: a_time
;
365 if(!null_timespec(ret1
)) {
370 * One of ctime, mtime or atime was zero (probably atime).
371 * Just return MIN(ctime, mtime).
376 /****************************************************************************
377 Return the 'create time' from a stat struct if it exists (birthtime) or else
378 use the best approximation.
379 ****************************************************************************/
381 static void make_create_timespec(const struct stat
*pst
, struct stat_ex
*dst
,
382 bool fake_dir_create_times
)
384 if (S_ISDIR(pst
->st_mode
) && fake_dir_create_times
) {
385 dst
->st_ex_btime
.tv_sec
= 315493200L; /* 1/1/1980 */
386 dst
->st_ex_btime
.tv_nsec
= 0;
389 dst
->st_ex_calculated_birthtime
= false;
391 #if defined(HAVE_STRUCT_STAT_ST_BIRTHTIMESPEC_TV_NSEC)
392 dst
->st_ex_btime
= pst
->st_birthtimespec
;
393 #elif defined(HAVE_STRUCT_STAT_ST_BIRTHTIMENSEC)
394 dst
->st_ex_btime
.tv_sec
= pst
->st_birthtime
;
395 dst
->st_ex_btime
.tv_nsec
= pst
->st_birthtimenspec
;
396 #elif defined(HAVE_STRUCT_STAT_ST_BIRTHTIME)
397 dst
->st_ex_btime
.tv_sec
= pst
->st_birthtime
;
398 dst
->st_ex_btime
.tv_nsec
= 0;
400 dst
->st_ex_btime
= calc_create_time_stat(pst
);
401 dst
->st_ex_calculated_birthtime
= true;
404 /* Deal with systems that don't initialize birthtime correctly.
405 * Pointed out by SATOH Fumiyasu <fumiyas@osstech.jp>.
407 if (null_timespec(dst
->st_ex_btime
)) {
408 dst
->st_ex_btime
= calc_create_time_stat(pst
);
409 dst
->st_ex_calculated_birthtime
= true;
413 /****************************************************************************
414 If we update a timestamp in a stat_ex struct we may have to recalculate
415 the birthtime. For now only implement this for write time, but we may
416 also need to do it for atime and ctime. JRA.
417 ****************************************************************************/
419 void update_stat_ex_mtime(struct stat_ex
*dst
,
420 struct timespec write_ts
)
422 dst
->st_ex_mtime
= write_ts
;
424 /* We may have to recalculate btime. */
425 if (dst
->st_ex_calculated_birthtime
) {
426 dst
->st_ex_btime
= calc_create_time_stat_ex(dst
);
430 void update_stat_ex_create_time(struct stat_ex
*dst
,
431 struct timespec create_time
)
433 dst
->st_ex_btime
= create_time
;
434 dst
->st_ex_calculated_birthtime
= false;
437 void init_stat_ex_from_stat (struct stat_ex
*dst
,
438 const struct stat
*src
,
439 bool fake_dir_create_times
)
441 dst
->st_ex_dev
= src
->st_dev
;
442 dst
->st_ex_ino
= src
->st_ino
;
443 dst
->st_ex_mode
= src
->st_mode
;
444 dst
->st_ex_nlink
= src
->st_nlink
;
445 dst
->st_ex_uid
= src
->st_uid
;
446 dst
->st_ex_gid
= src
->st_gid
;
447 dst
->st_ex_rdev
= src
->st_rdev
;
448 dst
->st_ex_size
= src
->st_size
;
449 dst
->st_ex_atime
= get_atimespec(src
);
450 dst
->st_ex_mtime
= get_mtimespec(src
);
451 dst
->st_ex_ctime
= get_ctimespec(src
);
452 make_create_timespec(src
, dst
, fake_dir_create_times
);
453 #ifdef HAVE_STAT_ST_BLKSIZE
454 dst
->st_ex_blksize
= src
->st_blksize
;
456 dst
->st_ex_blksize
= STAT_ST_BLOCKSIZE
;
459 #ifdef HAVE_STAT_ST_BLOCKS
460 dst
->st_ex_blocks
= src
->st_blocks
;
462 dst
->st_ex_blocks
= src
->st_size
/ dst
->st_ex_blksize
+ 1;
465 #ifdef HAVE_STAT_ST_FLAGS
466 dst
->st_ex_flags
= src
->st_flags
;
468 dst
->st_ex_flags
= 0;
472 /*******************************************************************
474 ********************************************************************/
476 int sys_stat(const char *fname
, SMB_STRUCT_STAT
*sbuf
,
477 bool fake_dir_create_times
)
481 ret
= stat(fname
, &statbuf
);
483 /* we always want directories to appear zero size */
484 if (S_ISDIR(statbuf
.st_mode
)) {
487 init_stat_ex_from_stat(sbuf
, &statbuf
, fake_dir_create_times
);
492 /*******************************************************************
494 ********************************************************************/
496 int sys_fstat(int fd
, SMB_STRUCT_STAT
*sbuf
, bool fake_dir_create_times
)
500 ret
= fstat(fd
, &statbuf
);
502 /* we always want directories to appear zero size */
503 if (S_ISDIR(statbuf
.st_mode
)) {
506 init_stat_ex_from_stat(sbuf
, &statbuf
, fake_dir_create_times
);
511 /*******************************************************************
513 ********************************************************************/
515 int sys_lstat(const char *fname
,SMB_STRUCT_STAT
*sbuf
,
516 bool fake_dir_create_times
)
520 ret
= lstat(fname
, &statbuf
);
522 /* we always want directories to appear zero size */
523 if (S_ISDIR(statbuf
.st_mode
)) {
526 init_stat_ex_from_stat(sbuf
, &statbuf
, fake_dir_create_times
);
531 /*******************************************************************
532 An posix_fallocate() wrapper.
533 ********************************************************************/
534 int sys_posix_fallocate(int fd
, off_t offset
, off_t len
)
536 #if defined(HAVE_POSIX_FALLOCATE) && !defined(HAVE_BROKEN_POSIX_FALLOCATE)
537 return posix_fallocate(fd
, offset
, len
);
538 #elif defined(F_RESVSP64)
539 /* this handles XFS on IRIX */
541 off_t new_len
= offset
+ len
;
545 /* unlikely to get a too large file on a 64bit system but ... */
549 fl
.l_whence
= SEEK_SET
;
553 ret
=fcntl(fd
, F_RESVSP64
, &fl
);
558 /* Make sure the file gets enlarged after we allocated space: */
560 if (new_len
> sbuf
.st_size
)
561 ftruncate64(fd
, new_len
);
568 /*******************************************************************
569 An fallocate() function that matches the semantics of the Linux one.
570 ********************************************************************/
572 #ifdef HAVE_LINUX_FALLOC_H
573 #include <linux/falloc.h>
576 int sys_fallocate(int fd
, enum vfs_fallocate_mode mode
, off_t offset
, off_t len
)
578 #if defined(HAVE_LINUX_FALLOCATE64) || defined(HAVE_LINUX_FALLOCATE)
581 case VFS_FALLOCATE_EXTEND_SIZE
:
584 case VFS_FALLOCATE_KEEP_SIZE
:
585 lmode
= FALLOC_FL_KEEP_SIZE
;
591 #if defined(HAVE_LINUX_FALLOCATE)
592 return fallocate(fd
, lmode
, offset
, len
);
595 /* TODO - plumb in fallocate from other filesysetms like VXFS etc. JRA. */
601 #if HAVE_KERNEL_SHARE_MODES
603 #define LOCK_MAND 32 /* This is a mandatory flock */
604 #define LOCK_READ 64 /* ... Which allows concurrent read operations */
605 #define LOCK_WRITE 128 /* ... Which allows concurrent write operations */
606 #define LOCK_RW 192 /* ... Which allows concurrent read & write ops */
610 /*******************************************************************
611 A flock() wrapper that will perform the kernel flock.
612 ********************************************************************/
614 void kernel_flock(int fd
, uint32 share_mode
, uint32 access_mask
)
616 #if HAVE_KERNEL_SHARE_MODES
618 if (share_mode
== FILE_SHARE_WRITE
) {
619 kernel_mode
= LOCK_MAND
|LOCK_WRITE
;
620 } else if (share_mode
== FILE_SHARE_READ
) {
621 kernel_mode
= LOCK_MAND
|LOCK_READ
;
622 } else if (share_mode
== FILE_SHARE_NONE
) {
623 kernel_mode
= LOCK_MAND
;
626 flock(fd
, kernel_mode
);
634 /*******************************************************************
635 An fdopendir wrapper.
636 Ugly hack - we need dirfd for this to work correctly in the
638 ********************************************************************/
640 DIR *sys_fdopendir(int fd
)
642 #if defined(HAVE_FDOPENDIR) && defined(HAVE_DIRFD)
643 return fdopendir(fd
);
650 /*******************************************************************
652 ********************************************************************/
654 int sys_mknod(const char *path
, mode_t mode
, SMB_DEV_T dev
)
656 #if defined(HAVE_MKNOD)
657 return mknod(path
, mode
, dev
);
659 /* No mknod system call. */
665 /*******************************************************************
666 The wait() calls vary between systems
667 ********************************************************************/
669 int sys_waitpid(pid_t pid
,int *status
,int options
)
672 return waitpid(pid
,status
,options
);
673 #else /* HAVE_WAITPID */
674 return wait4(pid
, status
, options
, NULL
);
675 #endif /* HAVE_WAITPID */
678 /*******************************************************************
679 System wrapper for getwd. Always returns MALLOC'ed memory, or NULL
680 on error (malloc fail usually).
681 ********************************************************************/
683 char *sys_getwd(void)
685 #ifdef GETCWD_TAKES_NULL
686 return getcwd(NULL
, 0);
688 char *wd
= NULL
, *s
= NULL
;
689 size_t allocated
= PATH_MAX
;
692 s
= SMB_REALLOC_ARRAY(s
, char, allocated
);
696 wd
= getcwd(s
, allocated
);
700 if (errno
!= ERANGE
) {
705 if (allocated
< PATH_MAX
) {
712 char *s
= SMB_MALLOC_ARRAY(char, PATH_MAX
);
720 #if defined(HAVE_POSIX_CAPABILITIES)
722 /**************************************************************************
723 Try and abstract process capabilities (for systems that have them).
724 ****************************************************************************/
726 /* Set the POSIX capabilities needed for the given purpose into the effective
727 * capability set of the current process. Make sure they are always removed
728 * from the inheritable set, because there is no circumstance in which our
729 * children should inherit our elevated privileges.
731 static bool set_process_capability(enum smbd_capability capability
,
734 cap_value_t cap_vals
[2] = {0};
735 int num_cap_vals
= 0;
739 #if defined(HAVE_PRCTL) && defined(PR_GET_KEEPCAPS) && defined(PR_SET_KEEPCAPS)
740 /* On Linux, make sure that any capabilities we grab are sticky
741 * across UID changes. We expect that this would allow us to keep both
742 * the effective and permitted capability sets, but as of circa 2.6.16,
743 * only the permitted set is kept. It is a bug (which we work around)
744 * that the effective set is lost, but we still require the effective
747 if (!prctl(PR_GET_KEEPCAPS
)) {
748 prctl(PR_SET_KEEPCAPS
, 1);
752 cap
= cap_get_proc();
754 DEBUG(0,("set_process_capability: cap_get_proc failed: %s\n",
759 switch (capability
) {
760 case KERNEL_OPLOCK_CAPABILITY
:
761 #ifdef CAP_NETWORK_MGT
762 /* IRIX has CAP_NETWORK_MGT for oplocks. */
763 cap_vals
[num_cap_vals
++] = CAP_NETWORK_MGT
;
766 case DMAPI_ACCESS_CAPABILITY
:
767 #ifdef CAP_DEVICE_MGT
768 /* IRIX has CAP_DEVICE_MGT for DMAPI access. */
769 cap_vals
[num_cap_vals
++] = CAP_DEVICE_MGT
;
771 /* Linux has CAP_MKNOD for DMAPI access. */
772 cap_vals
[num_cap_vals
++] = CAP_MKNOD
;
775 case LEASE_CAPABILITY
:
777 cap_vals
[num_cap_vals
++] = CAP_LEASE
;
782 SMB_ASSERT(num_cap_vals
<= ARRAY_SIZE(cap_vals
));
784 if (num_cap_vals
== 0) {
789 cap_set_flag(cap
, CAP_EFFECTIVE
, num_cap_vals
, cap_vals
,
790 enable
? CAP_SET
: CAP_CLEAR
);
792 /* We never want to pass capabilities down to our children, so make
793 * sure they are not inherited.
795 cap_set_flag(cap
, CAP_INHERITABLE
, num_cap_vals
, cap_vals
, CAP_CLEAR
);
797 if (cap_set_proc(cap
) == -1) {
798 DEBUG(0, ("set_process_capability: cap_set_proc failed: %s\n",
808 #endif /* HAVE_POSIX_CAPABILITIES */
810 /****************************************************************************
811 Gain the oplock capability from the kernel if possible.
812 ****************************************************************************/
814 void set_effective_capability(enum smbd_capability capability
)
816 #if defined(HAVE_POSIX_CAPABILITIES)
817 set_process_capability(capability
, True
);
818 #endif /* HAVE_POSIX_CAPABILITIES */
821 void drop_effective_capability(enum smbd_capability capability
)
823 #if defined(HAVE_POSIX_CAPABILITIES)
824 set_process_capability(capability
, False
);
825 #endif /* HAVE_POSIX_CAPABILITIES */
828 /**************************************************************************
829 Wrapper for random().
830 ****************************************************************************/
832 long sys_random(void)
834 #if defined(HAVE_RANDOM)
835 return (long)random();
836 #elif defined(HAVE_RAND)
839 DEBUG(0,("Error - no random function available !\n"));
844 /**************************************************************************
845 Wrapper for srandom().
846 ****************************************************************************/
848 void sys_srandom(unsigned int seed
)
850 #if defined(HAVE_SRANDOM)
852 #elif defined(HAVE_SRAND)
855 DEBUG(0,("Error - no srandom function available !\n"));
861 #define NGROUPS_MAX 32 /* Guess... */
864 /**************************************************************************
865 Returns equivalent to NGROUPS_MAX - using sysconf if needed.
866 ****************************************************************************/
870 #if defined(SYSCONF_SC_NGROUPS_MAX)
871 int ret
= sysconf(_SC_NGROUPS_MAX
);
872 return (ret
== -1) ? NGROUPS_MAX
: ret
;
878 /**************************************************************************
879 Wrap setgroups and getgroups for systems that declare getgroups() as
880 returning an array of gid_t, but actuall return an array of int.
881 ****************************************************************************/
883 #if defined(HAVE_BROKEN_GETGROUPS)
885 #ifdef HAVE_BROKEN_GETGROUPS
891 static int sys_broken_getgroups(int setlen
, gid_t
*gidset
)
898 return getgroups(setlen
, &gid
);
902 * Broken case. We need to allocate a
903 * GID_T array of size setlen.
912 setlen
= groups_max();
914 if((group_list
= SMB_MALLOC_ARRAY(GID_T
, setlen
)) == NULL
) {
915 DEBUG(0,("sys_getgroups: Malloc fail.\n"));
919 if((ngroups
= getgroups(setlen
, group_list
)) < 0) {
920 int saved_errno
= errno
;
921 SAFE_FREE(group_list
);
926 for(i
= 0; i
< ngroups
; i
++)
927 gidset
[i
] = (gid_t
)group_list
[i
];
929 SAFE_FREE(group_list
);
933 static int sys_broken_setgroups(int setlen
, gid_t
*gidset
)
941 if (setlen
< 0 || setlen
> groups_max()) {
947 * Broken case. We need to allocate a
948 * GID_T array of size setlen.
951 if((group_list
= SMB_MALLOC_ARRAY(GID_T
, setlen
)) == NULL
) {
952 DEBUG(0,("sys_setgroups: Malloc fail.\n"));
956 for(i
= 0; i
< setlen
; i
++)
957 group_list
[i
] = (GID_T
) gidset
[i
];
959 if(setgroups(setlen
, group_list
) != 0) {
960 int saved_errno
= errno
;
961 SAFE_FREE(group_list
);
966 SAFE_FREE(group_list
);
970 #endif /* HAVE_BROKEN_GETGROUPS */
972 /* This is a list of systems that require the first GID passed to setgroups(2)
973 * to be the effective GID. If your system is one of these, add it here.
975 #if defined (FREEBSD) || defined (DARWINOS)
976 #define USE_BSD_SETGROUPS
979 #if defined(USE_BSD_SETGROUPS)
980 /* Depending on the particular BSD implementation, the first GID that is
981 * passed to setgroups(2) will either be ignored or will set the credential's
982 * effective GID. In either case, the right thing to do is to guarantee that
983 * gidset[0] is the effective GID.
985 static int sys_bsd_setgroups(gid_t primary_gid
, int setlen
, const gid_t
*gidset
)
987 gid_t
*new_gidset
= NULL
;
991 /* setgroups(2) will fail with EINVAL if we pass too many groups. */
994 /* No group list, just make sure we are setting the efective GID. */
996 return setgroups(1, &primary_gid
);
999 /* If the primary gid is not the first array element, grow the array
1000 * and insert it at the front.
1002 if (gidset
[0] != primary_gid
) {
1003 new_gidset
= SMB_MALLOC_ARRAY(gid_t
, setlen
+ 1);
1004 if (new_gidset
== NULL
) {
1008 memcpy(new_gidset
+ 1, gidset
, (setlen
* sizeof(gid_t
)));
1009 new_gidset
[0] = primary_gid
;
1014 DEBUG(3, ("forced to truncate group list from %d to %d\n",
1019 #if defined(HAVE_BROKEN_GETGROUPS)
1020 ret
= sys_broken_setgroups(setlen
, new_gidset
? new_gidset
: gidset
);
1022 ret
= setgroups(setlen
, new_gidset
? new_gidset
: gidset
);
1027 SAFE_FREE(new_gidset
);
1034 #endif /* USE_BSD_SETGROUPS */
1036 /**************************************************************************
1037 Wrapper for getgroups. Deals with broken (int) case.
1038 ****************************************************************************/
1040 int sys_getgroups(int setlen
, gid_t
*gidset
)
1042 #if defined(HAVE_BROKEN_GETGROUPS)
1043 return sys_broken_getgroups(setlen
, gidset
);
1045 return getgroups(setlen
, gidset
);
1049 /**************************************************************************
1050 Wrapper for setgroups. Deals with broken (int) case and BSD case.
1051 ****************************************************************************/
1053 int sys_setgroups(gid_t
UNUSED(primary_gid
), int setlen
, gid_t
*gidset
)
1055 #if !defined(HAVE_SETGROUPS)
1058 #endif /* HAVE_SETGROUPS */
1060 #if defined(USE_BSD_SETGROUPS)
1061 return sys_bsd_setgroups(primary_gid
, setlen
, gidset
);
1062 #elif defined(HAVE_BROKEN_GETGROUPS)
1063 return sys_broken_setgroups(setlen
, gidset
);
1065 return setgroups(setlen
, gidset
);
1069 /**************************************************************************
1070 Extract a command into an arg list.
1071 ****************************************************************************/
1073 static char **extract_args(TALLOC_CTX
*mem_ctx
, const char *command
)
1082 if (!(trunc_cmd
= talloc_strdup(mem_ctx
, command
))) {
1083 DEBUG(0, ("talloc failed\n"));
1087 if(!(ptr
= strtok_r(trunc_cmd
, " \t", &saveptr
))) {
1088 TALLOC_FREE(trunc_cmd
);
1097 for( argcl
= 1; ptr
; ptr
= strtok_r(NULL
, " \t", &saveptr
))
1100 TALLOC_FREE(trunc_cmd
);
1102 if (!(argl
= talloc_array(mem_ctx
, char *, argcl
+ 1))) {
1107 * Now do the extraction.
1110 if (!(trunc_cmd
= talloc_strdup(mem_ctx
, command
))) {
1114 ptr
= strtok_r(trunc_cmd
, " \t", &saveptr
);
1117 if (!(argl
[i
++] = talloc_strdup(argl
, ptr
))) {
1121 while((ptr
= strtok_r(NULL
, " \t", &saveptr
)) != NULL
) {
1123 if (!(argl
[i
++] = talloc_strdup(argl
, ptr
))) {
1129 TALLOC_FREE(trunc_cmd
);
1133 DEBUG(0, ("talloc failed\n"));
1134 TALLOC_FREE(trunc_cmd
);
1140 /**************************************************************************
1141 Wrapper for popen. Safer as it doesn't search a path.
1142 Modified from the glibc sources.
1143 modified by tridge to return a file descriptor. We must kick our FILE* habit
1144 ****************************************************************************/
1146 typedef struct _popen_list
1150 struct _popen_list
*next
;
1153 static popen_list
*popen_chain
;
1155 int sys_popen(const char *command
)
1157 int parent_end
, child_end
;
1159 popen_list
*entry
= NULL
;
1162 if (pipe(pipe_fds
) < 0)
1165 parent_end
= pipe_fds
[0];
1166 child_end
= pipe_fds
[1];
1173 if((entry
= SMB_MALLOC_P(popen_list
)) == NULL
)
1176 ZERO_STRUCTP(entry
);
1179 * Extract the command and args into a NULL terminated array.
1182 if(!(argl
= extract_args(NULL
, command
)))
1185 entry
->child_pid
= fork();
1187 if (entry
->child_pid
== -1) {
1191 if (entry
->child_pid
== 0) {
1197 int child_std_end
= STDOUT_FILENO
;
1201 if (child_end
!= child_std_end
) {
1202 dup2 (child_end
, child_std_end
);
1207 * POSIX.2: "popen() shall ensure that any streams from previous
1208 * popen() calls that remain open in the parent process are closed
1209 * in the new child process."
1212 for (p
= popen_chain
; p
; p
= p
->next
)
1215 execv(argl
[0], argl
);
1226 /* Link into popen_chain. */
1227 entry
->next
= popen_chain
;
1228 popen_chain
= entry
;
1229 entry
->fd
= parent_end
;
1242 /**************************************************************************
1243 Wrapper for pclose. Modified from the glibc sources.
1244 ****************************************************************************/
1246 int sys_pclose(int fd
)
1249 popen_list
**ptr
= &popen_chain
;
1250 popen_list
*entry
= NULL
;
1254 /* Unlink from popen_chain. */
1255 for ( ; *ptr
!= NULL
; ptr
= &(*ptr
)->next
) {
1256 if ((*ptr
)->fd
== fd
) {
1258 *ptr
= (*ptr
)->next
;
1264 if (status
< 0 || close(entry
->fd
) < 0)
1268 * As Samba is catching and eating child process
1269 * exits we don't really care about the child exit
1270 * code, a -1 with errno = ECHILD will do fine for us.
1274 wait_pid
= sys_waitpid (entry
->child_pid
, &wstatus
, 0);
1275 } while (wait_pid
== -1 && errno
== EINTR
);
1284 /**************************************************************************
1285 Wrapper for Admin Logs.
1286 ****************************************************************************/
1288 void sys_adminlog(int priority
, const char *format_str
, ...)
1292 char *msgbuf
= NULL
;
1294 va_start( ap
, format_str
);
1295 ret
= vasprintf( &msgbuf
, format_str
, ap
);
1301 #if defined(HAVE_SYSLOG)
1302 syslog( priority
, "%s", msgbuf
);
1304 DEBUG(0,("%s", msgbuf
));
1309 /****************************************************************************
1310 Return the major devicenumber for UNIX extensions.
1311 ****************************************************************************/
1313 uint32
unix_dev_major(SMB_DEV_T dev
)
1315 #if defined(HAVE_DEVICE_MAJOR_FN)
1316 return (uint32
)major(dev
);
1318 return (uint32
)(dev
>> 8);
1322 /****************************************************************************
1323 Return the minor devicenumber for UNIX extensions.
1324 ****************************************************************************/
1326 uint32
unix_dev_minor(SMB_DEV_T dev
)
1328 #if defined(HAVE_DEVICE_MINOR_FN)
1329 return (uint32
)minor(dev
);
1331 return (uint32
)(dev
& 0xff);
1336 /*******************************************************************
1337 Return the number of CPUs.
1338 ********************************************************************/
1340 int sys_get_number_of_cores(void)
1344 #if defined(HAVE_SYSCONF)
1345 #if defined(_SC_NPROCESSORS_ONLN)
1346 ret
= (int)sysconf(_SC_NPROCESSORS_ONLN
);
1348 #if defined(_SC_NPROCESSORS_CONF)
1350 ret
= (int)sysconf(_SC_NPROCESSORS_CONF
);
1353 #elif defined(HAVE_SYSCTL) && defined(CTL_HW)
1355 unsigned int len
= sizeof(ret
);
1358 #if defined(HW_AVAILCPU)
1359 name
[1] = HW_AVAILCPU
;
1361 if (sysctl(name
, 2, &ret
, &len
, NULL
, 0) == -1) {
1365 #if defined(HW_NCPU)
1369 if (sysctl(nm
, 2, &count
, &len
, NULL
, 0) == -1) {
1382 #if defined(HAVE_AIO)
1384 /*******************************************************************
1385 An aio_read wrapper.
1386 ********************************************************************/
1388 int sys_aio_read(SMB_STRUCT_AIOCB
*aiocb
)
1390 #if defined(HAVE_AIO_READ)
1391 return aio_read(aiocb
);
1398 /*******************************************************************
1399 An aio_write wrapper.
1400 ********************************************************************/
1402 int sys_aio_write(SMB_STRUCT_AIOCB
*aiocb
)
1404 #if defined(HAVE_AIO_WRITE)
1405 return aio_write(aiocb
);
1412 /*******************************************************************
1413 An aio_return wrapper.
1414 ********************************************************************/
1416 ssize_t
sys_aio_return(SMB_STRUCT_AIOCB
*aiocb
)
1418 #if defined(HAVE_AIO_RETURN)
1419 return aio_return(aiocb
);
1426 /*******************************************************************
1427 An aio_cancel wrapper.
1428 ********************************************************************/
1430 int sys_aio_cancel(int fd
, SMB_STRUCT_AIOCB
*aiocb
)
1432 #if defined(HAVE_AIO_CANCEL)
1433 return aio_cancel(fd
, aiocb
);
1440 /*******************************************************************
1441 An aio_error wrapper.
1442 ********************************************************************/
1444 int sys_aio_error(const SMB_STRUCT_AIOCB
*aiocb
)
1446 #if defined(HAVE_AIO_ERROR)
1447 return aio_error(aiocb
);
1454 /*******************************************************************
1455 An aio_fsync wrapper.
1456 ********************************************************************/
1458 int sys_aio_fsync(int op
, SMB_STRUCT_AIOCB
*aiocb
)
1460 #if defined(HAVE_AIO_FSYNC)
1461 return aio_fsync(op
, aiocb
);
1468 /*******************************************************************
1469 An aio_fsync wrapper.
1470 ********************************************************************/
1472 int sys_aio_suspend(const SMB_STRUCT_AIOCB
* const cblist
[], int n
, const struct timespec
*timeout
)
1474 #if defined(HAVE_AIO_FSYNC)
1475 return aio_suspend(cblist
, n
, timeout
);
1481 #else /* !HAVE_AIO */
1483 int sys_aio_read(SMB_STRUCT_AIOCB
*aiocb
)
1489 int sys_aio_write(SMB_STRUCT_AIOCB
*aiocb
)
1495 ssize_t
sys_aio_return(SMB_STRUCT_AIOCB
*aiocb
)
1501 int sys_aio_cancel(int fd
, SMB_STRUCT_AIOCB
*aiocb
)
1507 int sys_aio_error(const SMB_STRUCT_AIOCB
*aiocb
)
1513 int sys_aio_fsync(int op
, SMB_STRUCT_AIOCB
*aiocb
)
1519 int sys_aio_suspend(const SMB_STRUCT_AIOCB
* const cblist
[], int n
, const struct timespec
*timeout
)
1524 #endif /* HAVE_AIO */