2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License, version 2 only,
7 * as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
26 #include <sys/types.h>
35 #include <common/lttng-kernel.h>
36 #include <common/common.h>
37 #include <common/utils.h>
38 #include <common/compat/getenv.h>
39 #include <common/compat/prctl.h>
40 #include <common/unix.h>
41 #include <common/defaults.h>
42 #include <common/lttng-elf.h>
44 #include <lttng/constant.h>
50 typedef int (*run_as_fct
)(struct run_as_data
*data
, struct run_as_ret
*ret_value
);
52 struct run_as_mkdir_data
{
57 struct run_as_open_data
{
63 struct run_as_unlink_data
{
67 struct run_as_rmdir_recursive_data
{
71 struct run_as_extract_elf_symbol_offset_data
{
72 char function
[LTTNG_SYMBOL_NAME_LEN
];
75 struct run_as_extract_sdt_probe_offsets_data
{
76 char probe_name
[LTTNG_SYMBOL_NAME_LEN
];
77 char provider_name
[LTTNG_SYMBOL_NAME_LEN
];
80 struct run_as_mkdir_ret
{
84 struct run_as_open_ret
{
88 struct run_as_unlink_ret
{
92 struct run_as_rmdir_recursive_ret
{
96 struct run_as_extract_elf_symbol_offset_ret
{
100 struct run_as_extract_sdt_probe_offsets_ret
{
102 uint64_t offsets
[LTTNG_KERNEL_MAX_UPROBE_NUM
];
109 RUN_AS_RMDIR_RECURSIVE
,
110 RUN_AS_MKDIR_RECURSIVE
,
111 RUN_AS_EXTRACT_ELF_SYMBOL_OFFSET
,
112 RUN_AS_EXTRACT_SDT_PROBE_OFFSETS
,
119 struct run_as_mkdir_data mkdir
;
120 struct run_as_open_data open
;
121 struct run_as_unlink_data unlink
;
122 struct run_as_rmdir_recursive_data rmdir_recursive
;
123 struct run_as_extract_elf_symbol_offset_data extract_elf_symbol_offset
;
124 struct run_as_extract_sdt_probe_offsets_data extract_sdt_probe_offsets
;
131 * The run_as_ret structure holds the returned value and status of the command.
133 * The `u` union field holds the return value of the command; in most cases it
134 * represents the success or the failure of the command. In more complex
135 * commands, it holds a computed value.
137 * The _errno field is the errno recorded after the execution of the command.
139 * The _error fields is used the signify that return status of the command. For
140 * simple commands returning `int` the _error field will be the same as the
141 * ret_int field. In complex commands, it signify the success or failure of the
148 struct run_as_mkdir_ret mkdir
;
149 struct run_as_open_ret open
;
150 struct run_as_unlink_ret unlink
;
151 struct run_as_rmdir_recursive_ret rmdir_recursive
;
152 struct run_as_extract_elf_symbol_offset_ret extract_elf_symbol_offset
;
153 struct run_as_extract_sdt_probe_offsets_ret extract_sdt_probe_offsets
;
159 struct run_as_worker
{
160 pid_t pid
; /* Worker PID. */
165 /* Single global worker per process (for now). */
166 static struct run_as_worker
*global_worker
;
167 /* Lock protecting the worker. */
168 static pthread_mutex_t worker_lock
= PTHREAD_MUTEX_INITIALIZER
;
180 return !lttng_secure_getenv("LTTNG_DEBUG_NOCLONE");
185 int _utils_mkdir_recursive_unsafe(const char *path
, mode_t mode
);
188 * Create recursively directory using the FULL path.
191 int _mkdir_recursive(struct run_as_data
*data
, struct run_as_ret
*ret_value
)
196 path
= data
->u
.mkdir
.path
;
197 mode
= data
->u
.mkdir
.mode
;
199 /* Safe to call as we have transitioned to the requested uid/gid. */
200 ret_value
->u
.mkdir
.ret
= _utils_mkdir_recursive_unsafe(path
, mode
);
201 ret_value
->_errno
= errno
;
202 ret_value
->_error
= (ret_value
->u
.mkdir
.ret
) ? true : false;
203 return ret_value
->u
.mkdir
.ret
;
207 int _mkdir(struct run_as_data
*data
, struct run_as_ret
*ret_value
)
209 ret_value
->u
.mkdir
.ret
= mkdir(data
->u
.mkdir
.path
, data
->u
.mkdir
.mode
);
210 ret_value
->_errno
= errno
;
211 ret_value
->_error
= (ret_value
->u
.mkdir
.ret
) ? true : false;
212 return ret_value
->u
.mkdir
.ret
;
216 int _open(struct run_as_data
*data
, struct run_as_ret
*ret_value
)
218 ret_value
->u
.open
.ret
= open(data
->u
.open
.path
, data
->u
.open
.flags
, data
->u
.open
.mode
);
219 ret_value
->fd
= ret_value
->u
.open
.ret
;
220 ret_value
->_errno
= errno
;
221 ret_value
->_error
= ret_value
->u
.open
.ret
< 0;
222 return ret_value
->u
.open
.ret
;
226 int _unlink(struct run_as_data
*data
, struct run_as_ret
*ret_value
)
228 ret_value
->u
.unlink
.ret
= unlink(data
->u
.unlink
.path
);
229 ret_value
->_errno
= errno
;
230 ret_value
->_error
= (ret_value
->u
.unlink
.ret
) ? true : false;
231 return ret_value
->u
.unlink
.ret
;
235 int _rmdir_recursive(struct run_as_data
*data
, struct run_as_ret
*ret_value
)
237 ret_value
->u
.rmdir_recursive
.ret
= utils_recursive_rmdir(data
->u
.rmdir_recursive
.path
);
238 ret_value
->_errno
= errno
;
239 ret_value
->_error
= (ret_value
->u
.rmdir_recursive
.ret
) ? true : false;
240 return ret_value
->u
.rmdir_recursive
.ret
;
244 int _extract_elf_symbol_offset(struct run_as_data
*data
,
245 struct run_as_ret
*ret_value
)
248 ret_value
->_error
= false;
250 ret
= lttng_elf_get_symbol_offset(data
->fd
,
251 data
->u
.extract_elf_symbol_offset
.function
,
252 &ret_value
->u
.extract_elf_symbol_offset
.offset
);
254 DBG("Failed to extract ELF function offset");
255 ret_value
->_error
= true;
262 int _extract_sdt_probe_offsets(struct run_as_data
*data
,
263 struct run_as_ret
*ret_value
)
266 uint64_t *offsets
= NULL
;
269 ret_value
->_error
= false;
271 /* On success, this call allocates the offsets paramater. */
272 ret
= lttng_elf_get_sdt_probe_offsets(data
->fd
,
273 data
->u
.extract_sdt_probe_offsets
.provider_name
,
274 data
->u
.extract_sdt_probe_offsets
.probe_name
,
275 &offsets
, &num_offset
);
278 DBG("Failed to extract SDT probe offsets");
279 ret_value
->_error
= true;
283 if (num_offset
<= 0 || num_offset
> LTTNG_KERNEL_MAX_UPROBE_NUM
) {
284 DBG("Wrong number of probes.");
286 ret_value
->_error
= true;
290 /* Copy the content of the offsets array to the ret struct. */
291 memcpy(ret_value
->u
.extract_sdt_probe_offsets
.offsets
,
292 offsets
, num_offset
* sizeof(uint64_t));
294 ret_value
->u
.extract_sdt_probe_offsets
.num_offset
= num_offset
;
303 run_as_fct
run_as_enum_to_fct(enum run_as_cmd cmd
)
312 case RUN_AS_RMDIR_RECURSIVE
:
313 return _rmdir_recursive
;
314 case RUN_AS_MKDIR_RECURSIVE
:
315 return _mkdir_recursive
;
316 case RUN_AS_EXTRACT_ELF_SYMBOL_OFFSET
:
317 return _extract_elf_symbol_offset
;
318 case RUN_AS_EXTRACT_SDT_PROBE_OFFSETS
:
319 return _extract_sdt_probe_offsets
;
321 ERR("Unknown command %d", (int) cmd
);
327 int do_send_fd(int sock
, int fd
)
332 ERR("Attempt to send invalid file descriptor to master (fd = %i)", fd
);
333 /* Return 0 as this is not a fatal error. */
337 len
= lttcomm_send_fds_unix_sock(sock
, &fd
, 1);
339 PERROR("lttcomm_send_fds_unix_sock");
346 int do_recv_fd(int sock
, int *fd
)
350 len
= lttcomm_recv_fds_unix_sock(sock
, fd
, 1);
354 } else if (len
< 0) {
355 PERROR("lttcomm_recv_fds_unix_sock");
359 ERR("Invalid file descriptor received from worker (fd = %i)", *fd
);
360 /* Return 0 as this is not a fatal error. */
368 int send_fd_to_worker(struct run_as_worker
*worker
, enum run_as_cmd cmd
, int fd
)
373 case RUN_AS_EXTRACT_ELF_SYMBOL_OFFSET
:
374 case RUN_AS_EXTRACT_SDT_PROBE_OFFSETS
:
381 ERR("Refusing to send invalid fd to worker (fd = %i)", fd
);
385 ret
= do_send_fd(worker
->sockpair
[0], fd
);
387 PERROR("do_send_fd");
395 int send_fd_to_master(struct run_as_worker
*worker
, enum run_as_cmd cmd
, int fd
)
397 int ret
= 0, ret_close
= 0;
407 DBG("Not sending file descriptor to master as it is invalid (fd = %i)", fd
);
410 ret
= do_send_fd(worker
->sockpair
[1], fd
);
412 PERROR("do_send_fd error");
416 ret_close
= close(fd
);
425 int recv_fd_from_worker(struct run_as_worker
*worker
, enum run_as_cmd cmd
, int *fd
)
436 ret
= do_recv_fd(worker
->sockpair
[0], fd
);
438 PERROR("do_recv_fd error");
446 int recv_fd_from_master(struct run_as_worker
*worker
, enum run_as_cmd cmd
, int *fd
)
451 case RUN_AS_EXTRACT_ELF_SYMBOL_OFFSET
:
452 case RUN_AS_EXTRACT_SDT_PROBE_OFFSETS
:
458 ret
= do_recv_fd(worker
->sockpair
[1], fd
);
460 PERROR("do_recv_fd error");
468 int cleanup_received_fd(enum run_as_cmd cmd
, int fd
)
473 case RUN_AS_EXTRACT_ELF_SYMBOL_OFFSET
:
474 case RUN_AS_EXTRACT_SDT_PROBE_OFFSETS
:
485 PERROR("close error");
493 * Return < 0 on error, 0 if OK, 1 on hangup.
496 int handle_one_cmd(struct run_as_worker
*worker
)
499 struct run_as_data data
;
500 ssize_t readlen
, writelen
;
501 struct run_as_ret sendret
;
505 memset(&sendret
, 0, sizeof(sendret
));
509 * Stage 1: Receive run_as_data struct from the master.
510 * The structure contains the command type and all the parameters needed for
513 readlen
= lttcomm_recv_unix_sock(worker
->sockpair
[1], &data
,
520 if (readlen
< sizeof(data
)) {
521 PERROR("lttcomm_recv_unix_sock error");
526 cmd
= run_as_enum_to_fct(data
.cmd
);
533 * Stage 2: Receive file descriptor from master.
534 * Some commands need a file descriptor as input so if it's needed we
535 * receive the fd using the Unix socket.
537 ret
= recv_fd_from_master(worker
, data
.cmd
, &data
.fd
);
539 PERROR("recv_fd_from_master error");
544 prev_euid
= getuid();
545 if (data
.gid
!= getegid()) {
546 ret
= setegid(data
.gid
);
548 sendret
._error
= true;
549 sendret
._errno
= errno
;
554 if (data
.uid
!= prev_euid
) {
555 ret
= seteuid(data
.uid
);
557 sendret
._error
= true;
558 sendret
._errno
= errno
;
565 * Also set umask to 0 for mkdir executable bit.
570 * Stage 3: Execute the command
572 ret
= (*cmd
)(&data
, &sendret
);
574 DBG("Execution of command returned an error");
578 ret
= cleanup_received_fd(data
.cmd
, data
.fd
);
580 ERR("Error cleaning up FD");
585 * Stage 4: Send run_as_ret structure to the master.
586 * This structure contain the return value of the command and the errno.
588 writelen
= lttcomm_send_unix_sock(worker
->sockpair
[1], &sendret
,
590 if (writelen
< sizeof(sendret
)) {
591 PERROR("lttcomm_send_unix_sock error");
597 * Stage 5: Send file descriptor to the master
598 * Some commands return a file descriptor so if it's needed we pass it back
599 * to the master using the Unix socket.
601 ret
= send_fd_to_master(worker
, data
.cmd
, sendret
.fd
);
603 DBG("Sending FD to master returned an error");
607 if (seteuid(prev_euid
) < 0) {
618 int run_as_worker(struct run_as_worker
*worker
)
622 struct run_as_ret sendret
;
623 size_t proc_orig_len
;
626 * Initialize worker. Set a different process cmdline.
628 proc_orig_len
= strlen(worker
->procname
);
629 memset(worker
->procname
, 0, proc_orig_len
);
630 strncpy(worker
->procname
, DEFAULT_RUN_AS_WORKER_NAME
, proc_orig_len
);
632 ret
= lttng_prctl(PR_SET_NAME
,
633 (unsigned long) DEFAULT_RUN_AS_WORKER_NAME
, 0, 0, 0);
634 if (ret
&& ret
!= -ENOSYS
) {
635 /* Don't fail as this is not essential. */
636 PERROR("prctl PR_SET_NAME");
639 memset(&sendret
, 0, sizeof(sendret
));
641 writelen
= lttcomm_send_unix_sock(worker
->sockpair
[1], &sendret
,
643 if (writelen
< sizeof(sendret
)) {
644 PERROR("lttcomm_send_unix_sock error");
650 ret
= handle_one_cmd(worker
);
654 } else if (ret
> 0) {
657 continue; /* Next command. */
666 int run_as_cmd(struct run_as_worker
*worker
,
668 struct run_as_data
*data
,
669 struct run_as_ret
*ret_value
,
670 uid_t uid
, gid_t gid
)
673 ssize_t readlen
, writelen
;
676 * If we are non-root, we can only deal with our own uid.
678 if (geteuid() != 0) {
679 if (uid
!= geteuid()) {
681 ret_value
->_errno
= EPERM
;
682 ERR("Client (%d)/Server (%d) UID mismatch (and sessiond is not root)",
683 (int) uid
, (int) geteuid());
693 * Stage 1: Send the run_as_data struct to the worker process
695 writelen
= lttcomm_send_unix_sock(worker
->sockpair
[0], data
,
697 if (writelen
< sizeof(*data
)) {
698 PERROR("Error writing message to run_as");
700 ret_value
->_errno
= EIO
;
705 * Stage 2: Send file descriptor to the worker process if needed
707 ret
= send_fd_to_worker(worker
, data
->cmd
, data
->fd
);
709 PERROR("do_send_fd error");
711 ret_value
->_errno
= EIO
;
716 * Stage 3: Wait for the execution of the command
720 * Stage 4: Receive the run_as_ret struct containing the return value and
723 readlen
= lttcomm_recv_unix_sock(worker
->sockpair
[0], ret_value
,
726 ERR("Run-as worker has hung-up during run_as_cmd");
728 ret_value
->_errno
= EIO
;
730 } else if (readlen
< sizeof(*ret_value
)) {
731 PERROR("Error reading response from run_as");
733 ret_value
->_errno
= errno
;
737 if (ret_value
->_error
) {
738 /* Skip stage 5 on error as there will be no fd to receive. */
743 * Stage 5: Receive file descriptor if needed
745 ret
= recv_fd_from_worker(worker
, data
->cmd
, &ret_value
->fd
);
747 ERR("Error receiving fd");
749 ret_value
->_errno
= EIO
;
757 * This is for debugging ONLY and should not be considered secure.
760 int run_as_noworker(enum run_as_cmd cmd
,
761 struct run_as_data
*data
, struct run_as_ret
*ret_value
,
762 uid_t uid
, gid_t gid
)
764 int ret
, saved_errno
;
768 fct
= run_as_enum_to_fct(cmd
);
775 ret
= fct(data
, ret_value
);
776 saved_errno
= ret_value
->_errno
;
784 int reset_sighandler(void)
788 DBG("Resetting run_as worker signal handlers to default");
789 for (sig
= 1; sig
<= 31; sig
++) {
790 (void) signal(sig
, SIG_DFL
);
796 void worker_sighandler(int sig
)
801 * The worker will inherit its parent's signals since they are part of
802 * the same process group. However, in the case of SIGINT and SIGTERM,
803 * we want to give the worker a chance to teardown gracefully when its
804 * parent closes the command socket.
818 DBG("run_as worker received signal %s", signame
);
820 DBG("run_as_worker received signal %d", sig
);
825 int set_worker_sighandlers(void)
831 if ((ret
= sigemptyset(&sigset
)) < 0) {
832 PERROR("sigemptyset");
836 sa
.sa_handler
= worker_sighandler
;
839 if ((ret
= sigaction(SIGINT
, &sa
, NULL
)) < 0) {
840 PERROR("sigaction SIGINT");
844 if ((ret
= sigaction(SIGTERM
, &sa
, NULL
)) < 0) {
845 PERROR("sigaction SIGTERM");
849 DBG("run_as signal handler set for SIGTERM and SIGINT");
855 int run_as_create_worker_no_lock(const char *procname
)
860 struct run_as_ret recvret
;
861 struct run_as_worker
*worker
;
863 assert(!global_worker
);
866 * Don't initialize a worker, all run_as tasks will be performed
867 * in the current process.
872 worker
= zmalloc(sizeof(*worker
));
877 worker
->procname
= strdup(procname
);
878 if (!worker
->procname
) {
880 goto error_procname_alloc
;
882 /* Create unix socket. */
883 if (lttcomm_create_anon_unix_socketpair(worker
->sockpair
) < 0) {
894 } else if (pid
== 0) {
899 set_worker_sighandlers();
901 /* Just close, no shutdown. */
902 if (close(worker
->sockpair
[0])) {
908 * Close all FDs aside from STDIN, STDOUT, STDERR and sockpair[1]
909 * Sockpair[1] is used as a control channel with the master
911 for (i
= 3; i
< sysconf(_SC_OPEN_MAX
); i
++) {
912 if (i
!= worker
->sockpair
[1]) {
917 worker
->sockpair
[0] = -1;
918 ret
= run_as_worker(worker
);
919 if (lttcomm_close_unix_sock(worker
->sockpair
[1])) {
923 worker
->sockpair
[1] = -1;
924 LOG(ret
? PRINT_ERR
: PRINT_DBG
, "run_as worker exiting (ret = %d)", ret
);
925 exit(ret
? EXIT_FAILURE
: EXIT_SUCCESS
);
929 /* Just close, no shutdown. */
930 if (close(worker
->sockpair
[1])) {
935 worker
->sockpair
[1] = -1;
937 /* Wait for worker to become ready. */
938 readlen
= lttcomm_recv_unix_sock(worker
->sockpair
[0],
939 &recvret
, sizeof(recvret
));
940 if (readlen
< sizeof(recvret
)) {
941 ERR("readlen: %zd", readlen
);
942 PERROR("Error reading response from run_as at creation");
946 global_worker
= worker
;
951 /* Error handling. */
953 for (i
= 0; i
< 2; i
++) {
954 if (worker
->sockpair
[i
] < 0) {
957 if (lttcomm_close_unix_sock(worker
->sockpair
[i
])) {
960 worker
->sockpair
[i
] = -1;
963 free(worker
->procname
);
964 error_procname_alloc
:
970 int run_as_restart_worker(struct run_as_worker
*worker
)
973 char *procname
= NULL
;
975 procname
= worker
->procname
;
977 /* Close socket to run_as worker process and clean up the zombie process */
978 run_as_destroy_worker();
980 /* Create a new run_as worker process*/
981 ret
= run_as_create_worker_no_lock(procname
);
983 ERR("Restarting the worker process failed");
992 int run_as(enum run_as_cmd cmd
, struct run_as_data
*data
,
993 struct run_as_ret
*ret_value
, uid_t uid
, gid_t gid
)
995 int ret
, saved_errno
;
997 pthread_mutex_lock(&worker_lock
);
999 DBG("Using run_as worker");
1001 assert(global_worker
);
1003 ret
= run_as_cmd(global_worker
, cmd
, data
, ret_value
, uid
, gid
);
1004 saved_errno
= ret_value
->_errno
;
1007 * If the worker thread crashed the errno is set to EIO. we log
1008 * the error and start a new worker process.
1010 if (ret
== -1 && saved_errno
== EIO
) {
1011 DBG("Socket closed unexpectedly... "
1012 "Restarting the worker process");
1013 ret
= run_as_restart_worker(global_worker
);
1015 ERR("Failed to restart worker process.");
1020 DBG("Using run_as without worker");
1021 ret
= run_as_noworker(cmd
, data
, ret_value
, uid
, gid
);
1024 pthread_mutex_unlock(&worker_lock
);
1029 int run_as_mkdir_recursive(const char *path
, mode_t mode
, uid_t uid
, gid_t gid
)
1031 struct run_as_data data
;
1032 struct run_as_ret ret
;
1034 memset(&data
, 0, sizeof(data
));
1035 memset(&ret
, 0, sizeof(ret
));
1036 DBG3("mkdir() recursive %s with mode %d for uid %d and gid %d",
1037 path
, (int) mode
, (int) uid
, (int) gid
);
1038 strncpy(data
.u
.mkdir
.path
, path
, PATH_MAX
- 1);
1039 data
.u
.mkdir
.path
[PATH_MAX
- 1] = '\0';
1040 data
.u
.mkdir
.mode
= mode
;
1042 run_as(RUN_AS_MKDIR_RECURSIVE
, &data
, &ret
, uid
, gid
);
1044 return ret
.u
.mkdir
.ret
;
1048 int run_as_mkdir(const char *path
, mode_t mode
, uid_t uid
, gid_t gid
)
1050 struct run_as_data data
;
1051 struct run_as_ret ret
;
1053 memset(&data
, 0, sizeof(data
));
1054 memset(&ret
, 0, sizeof(ret
));
1056 DBG3("mkdir() %s with mode %d for uid %d and gid %d",
1057 path
, (int) mode
, (int) uid
, (int) gid
);
1058 strncpy(data
.u
.mkdir
.path
, path
, PATH_MAX
- 1);
1059 data
.u
.mkdir
.path
[PATH_MAX
- 1] = '\0';
1060 data
.u
.mkdir
.mode
= mode
;
1061 run_as(RUN_AS_MKDIR
, &data
, &ret
, uid
, gid
);
1063 return ret
.u
.mkdir
.ret
;
1067 int run_as_open(const char *path
, int flags
, mode_t mode
, uid_t uid
, gid_t gid
)
1069 struct run_as_data data
;
1070 struct run_as_ret ret
;
1072 memset(&data
, 0, sizeof(data
));
1073 memset(&ret
, 0, sizeof(ret
));
1075 DBG3("open() %s with flags %X mode %d for uid %d and gid %d",
1076 path
, flags
, (int) mode
, (int) uid
, (int) gid
);
1077 strncpy(data
.u
.open
.path
, path
, PATH_MAX
- 1);
1078 data
.u
.open
.path
[PATH_MAX
- 1] = '\0';
1079 data
.u
.open
.flags
= flags
;
1080 data
.u
.open
.mode
= mode
;
1081 run_as(RUN_AS_OPEN
, &data
, &ret
, uid
, gid
);
1083 ret
.u
.open
.ret
= ret
.fd
;
1084 return ret
.u
.open
.ret
;
1088 int run_as_unlink(const char *path
, uid_t uid
, gid_t gid
)
1090 struct run_as_data data
;
1091 struct run_as_ret ret
;
1093 memset(&data
, 0, sizeof(data
));
1094 memset(&ret
, 0, sizeof(ret
));
1096 DBG3("unlink() %s with for uid %d and gid %d",
1097 path
, (int) uid
, (int) gid
);
1098 strncpy(data
.u
.unlink
.path
, path
, PATH_MAX
- 1);
1099 data
.u
.unlink
.path
[PATH_MAX
- 1] = '\0';
1100 run_as(RUN_AS_UNLINK
, &data
, &ret
, uid
, gid
);
1102 return ret
.u
.unlink
.ret
;
1106 int run_as_rmdir_recursive(const char *path
, uid_t uid
, gid_t gid
)
1108 struct run_as_data data
;
1109 struct run_as_ret ret
;
1111 memset(&data
, 0, sizeof(data
));
1112 memset(&ret
, 0, sizeof(ret
));
1114 DBG3("rmdir_recursive() %s with for uid %d and gid %d",
1115 path
, (int) uid
, (int) gid
);
1116 strncpy(data
.u
.rmdir_recursive
.path
, path
, PATH_MAX
- 1);
1117 data
.u
.rmdir_recursive
.path
[PATH_MAX
- 1] = '\0';
1118 run_as(RUN_AS_RMDIR_RECURSIVE
, &data
, &ret
, uid
, gid
);
1120 return ret
.u
.rmdir_recursive
.ret
;
1124 int run_as_extract_elf_symbol_offset(int fd
, const char* function
,
1125 uid_t uid
, gid_t gid
, uint64_t *offset
)
1127 struct run_as_data data
;
1128 struct run_as_ret ret
;
1130 memset(&data
, 0, sizeof(data
));
1131 memset(&ret
, 0, sizeof(ret
));
1133 DBG3("extract_elf_symbol_offset() on fd=%d and function=%s "
1134 "with for uid %d and gid %d", fd
, function
, (int) uid
, (int) gid
);
1138 strncpy(data
.u
.extract_elf_symbol_offset
.function
, function
, LTTNG_SYMBOL_NAME_LEN
- 1);
1140 data
.u
.extract_elf_symbol_offset
.function
[LTTNG_SYMBOL_NAME_LEN
- 1] = '\0';
1142 run_as(RUN_AS_EXTRACT_ELF_SYMBOL_OFFSET
, &data
, &ret
, uid
, gid
);
1150 *offset
= ret
.u
.extract_elf_symbol_offset
.offset
;
1155 int run_as_extract_sdt_probe_offsets(int fd
, const char* provider_name
,
1156 const char* probe_name
, uid_t uid
, gid_t gid
,
1157 uint64_t **offsets
, uint32_t *num_offset
)
1159 struct run_as_data data
;
1160 struct run_as_ret ret
;
1162 memset(&data
, 0, sizeof(data
));
1163 memset(&ret
, 0, sizeof(ret
));
1165 DBG3("extract_sdt_probe_offsets() on fd=%d, probe_name=%s and "
1166 "provider_name=%s with for uid %d and gid %d", fd
, probe_name
,
1167 provider_name
, (int) uid
, (int) gid
);
1171 strncpy(data
.u
.extract_sdt_probe_offsets
.probe_name
, probe_name
, LTTNG_SYMBOL_NAME_LEN
- 1);
1172 strncpy(data
.u
.extract_sdt_probe_offsets
.provider_name
, provider_name
, LTTNG_SYMBOL_NAME_LEN
- 1);
1174 data
.u
.extract_sdt_probe_offsets
.probe_name
[LTTNG_SYMBOL_NAME_LEN
- 1] = '\0';
1175 data
.u
.extract_sdt_probe_offsets
.provider_name
[LTTNG_SYMBOL_NAME_LEN
- 1] = '\0';
1177 run_as(RUN_AS_EXTRACT_SDT_PROBE_OFFSETS
, &data
, &ret
, uid
, gid
);
1185 *num_offset
= ret
.u
.extract_sdt_probe_offsets
.num_offset
;
1187 *offsets
= zmalloc(*num_offset
* sizeof(uint64_t));
1192 memcpy(*offsets
, ret
.u
.extract_sdt_probe_offsets
.offsets
, *num_offset
* sizeof(uint64_t));
1197 int run_as_create_worker(const char *procname
)
1201 pthread_mutex_lock(&worker_lock
);
1202 ret
= run_as_create_worker_no_lock(procname
);
1203 pthread_mutex_unlock(&worker_lock
);
1208 void run_as_destroy_worker(void)
1210 struct run_as_worker
*worker
= global_worker
;
1212 DBG("Destroying run_as worker");
1213 pthread_mutex_lock(&worker_lock
);
1217 /* Close unix socket */
1218 DBG("Closing run_as worker socket");
1219 if (lttcomm_close_unix_sock(worker
->sockpair
[0])) {
1222 worker
->sockpair
[0] = -1;
1223 /* Wait for worker. */
1228 wait_ret
= waitpid(worker
->pid
, &status
, 0);
1230 if (errno
== EINTR
) {
1237 if (WIFEXITED(status
)) {
1238 LOG(WEXITSTATUS(status
) == 0 ? PRINT_DBG
: PRINT_ERR
,
1239 DEFAULT_RUN_AS_WORKER_NAME
" terminated with status code %d",
1240 WEXITSTATUS(status
));
1242 } else if (WIFSIGNALED(status
)) {
1243 ERR(DEFAULT_RUN_AS_WORKER_NAME
" was killed by signal %d",
1248 free(worker
->procname
);
1250 global_worker
= NULL
;
1252 pthread_mutex_unlock(&worker_lock
);