1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
29 #include <sys/socket.h>
31 #include <sys/prctl.h>
32 #include <linux/sched.h>
33 #include <sys/types.h>
37 #include <sys/mount.h>
46 #include "securebits.h"
48 #include "namespace.h"
50 /* This assumes there is a 'tty' group */
53 static int shift_fds(int fds
[], unsigned n_fds
) {
54 int start
, restart_from
;
59 /* Modifies the fds array! (sorts it) */
69 for (i
= start
; i
< (int) n_fds
; i
++) {
72 /* Already at right index? */
76 if ((nfd
= fcntl(fds
[i
], F_DUPFD
, i
+3)) < 0)
79 close_nointr_nofail(fds
[i
]);
82 /* Hmm, the fd we wanted isn't free? Then
83 * let's remember that and try again from here*/
84 if (nfd
!= i
+3 && restart_from
< 0)
97 static int flags_fds(const int fds
[], unsigned n_fds
, bool nonblock
) {
106 /* Drops/Sets O_NONBLOCK and FD_CLOEXEC from the file flags */
108 for (i
= 0; i
< n_fds
; i
++) {
110 if ((r
= fd_nonblock(fds
[i
], nonblock
)) < 0)
113 /* We unconditionally drop FD_CLOEXEC from the fds,
114 * since after all we want to pass these fds to our
117 if ((r
= fd_cloexec(fds
[i
], false)) < 0)
124 static const char *tty_path(const ExecContext
*context
) {
127 if (context
->tty_path
)
128 return context
->tty_path
;
130 return "/dev/console";
133 static int open_null_as(int flags
, int nfd
) {
138 if ((fd
= open("/dev/null", flags
|O_NOCTTY
)) < 0)
142 r
= dup2(fd
, nfd
) < 0 ? -errno
: nfd
;
143 close_nointr_nofail(fd
);
150 static int connect_logger_as(const ExecContext
*context
, ExecOutput output
, const char *ident
, int nfd
) {
154 struct sockaddr_un un
;
158 assert(output
< _EXEC_OUTPUT_MAX
);
162 if ((fd
= socket(AF_UNIX
, SOCK_STREAM
, 0)) < 0)
166 sa
.sa
.sa_family
= AF_UNIX
;
167 strncpy(sa
.un
.sun_path
+1, LOGGER_SOCKET
, sizeof(sa
.un
.sun_path
)-1);
169 if (connect(fd
, &sa
.sa
, sizeof(sa
)) < 0) {
170 close_nointr_nofail(fd
);
174 if (shutdown(fd
, SHUT_RD
) < 0) {
175 close_nointr_nofail(fd
);
179 /* We speak a very simple protocol between log server
180 * and client: one line for the log destination (kmsg
181 * or syslog), followed by the priority field,
182 * followed by the process name. Since we replaced
183 * stdin/stderr we simple use stdio to write to
184 * it. Note that we use stderr, to minimize buffer
185 * flushing issues. */
191 output
== EXEC_OUTPUT_KERNEL
? "kmsg" : "syslog",
192 context
->syslog_priority
,
193 context
->syslog_identifier
? context
->syslog_identifier
: ident
);
196 r
= dup2(fd
, nfd
) < 0 ? -errno
: nfd
;
197 close_nointr_nofail(fd
);
203 static int open_terminal_as(const char *path
, mode_t mode
, int nfd
) {
209 if ((fd
= open_terminal(path
, mode
| O_NOCTTY
)) < 0)
213 r
= dup2(fd
, nfd
) < 0 ? -errno
: nfd
;
214 close_nointr_nofail(fd
);
221 static bool is_terminal_input(ExecInput i
) {
223 i
== EXEC_INPUT_TTY
||
224 i
== EXEC_INPUT_TTY_FORCE
||
225 i
== EXEC_INPUT_TTY_FAIL
;
228 static int fixup_input(const ExecContext
*context
, int socket_fd
) {
231 if (socket_fd
< 0 && context
->std_input
== EXEC_INPUT_SOCKET
)
232 return EXEC_INPUT_NULL
;
234 return context
->std_input
;
237 static int fixup_output(const ExecContext
*context
, int socket_fd
) {
240 if (socket_fd
< 0 && context
->std_output
== EXEC_OUTPUT_SOCKET
)
241 return EXEC_OUTPUT_INHERIT
;
243 return context
->std_output
;
246 static int fixup_error(const ExecContext
*context
, int socket_fd
) {
249 if (socket_fd
< 0 && context
->std_error
== EXEC_OUTPUT_SOCKET
)
250 return EXEC_OUTPUT_INHERIT
;
252 return context
->std_error
;
255 static int setup_input(const ExecContext
*context
, int socket_fd
) {
260 i
= fixup_input(context
, socket_fd
);
264 case EXEC_INPUT_NULL
:
265 return open_null_as(O_RDONLY
, STDIN_FILENO
);
268 case EXEC_INPUT_TTY_FORCE
:
269 case EXEC_INPUT_TTY_FAIL
: {
272 if ((fd
= acquire_terminal(
274 i
== EXEC_INPUT_TTY_FAIL
,
275 i
== EXEC_INPUT_TTY_FORCE
)) < 0)
278 if (fd
!= STDIN_FILENO
) {
279 r
= dup2(fd
, STDIN_FILENO
) < 0 ? -errno
: STDIN_FILENO
;
280 close_nointr_nofail(fd
);
287 case EXEC_INPUT_SOCKET
:
288 return dup2(socket_fd
, STDIN_FILENO
) < 0 ? -errno
: STDIN_FILENO
;
291 assert_not_reached("Unknown input type");
295 static int setup_output(const ExecContext
*context
, int socket_fd
, const char *ident
) {
302 i
= fixup_input(context
, socket_fd
);
303 o
= fixup_output(context
, socket_fd
);
305 /* This expects the input is already set up */
309 case EXEC_OUTPUT_INHERIT
:
311 /* If the input is connected to a terminal, inherit that... */
312 if (is_terminal_input(i
) || i
== EXEC_INPUT_SOCKET
)
313 return dup2(STDIN_FILENO
, STDOUT_FILENO
) < 0 ? -errno
: STDOUT_FILENO
;
317 case EXEC_OUTPUT_NULL
:
318 return open_null_as(O_WRONLY
, STDOUT_FILENO
);
320 case EXEC_OUTPUT_TTY
:
321 if (is_terminal_input(i
))
322 return dup2(STDIN_FILENO
, STDOUT_FILENO
) < 0 ? -errno
: STDOUT_FILENO
;
324 /* We don't reset the terminal if this is just about output */
325 return open_terminal_as(tty_path(context
), O_WRONLY
, STDOUT_FILENO
);
327 case EXEC_OUTPUT_SYSLOG
:
328 case EXEC_OUTPUT_KERNEL
:
329 return connect_logger_as(context
, o
, ident
, STDOUT_FILENO
);
331 case EXEC_OUTPUT_SOCKET
:
332 assert(socket_fd
>= 0);
333 return dup2(socket_fd
, STDOUT_FILENO
) < 0 ? -errno
: STDOUT_FILENO
;
336 assert_not_reached("Unknown output type");
340 static int setup_error(const ExecContext
*context
, int socket_fd
, const char *ident
) {
347 i
= fixup_input(context
, socket_fd
);
348 o
= fixup_output(context
, socket_fd
);
349 e
= fixup_error(context
, socket_fd
);
351 /* This expects the input and output are already set up */
353 /* Don't change the stderr file descriptor if we inherit all
354 * the way and are not on a tty */
355 if (e
== EXEC_OUTPUT_INHERIT
&&
356 o
== EXEC_OUTPUT_INHERIT
&&
357 !is_terminal_input(i
))
358 return STDERR_FILENO
;
360 /* Duplicate form stdout if possible */
361 if (e
== o
|| e
== EXEC_OUTPUT_INHERIT
)
362 return dup2(STDOUT_FILENO
, STDERR_FILENO
) < 0 ? -errno
: STDERR_FILENO
;
366 case EXEC_OUTPUT_NULL
:
367 return open_null_as(O_WRONLY
, STDERR_FILENO
);
369 case EXEC_OUTPUT_TTY
:
370 if (is_terminal_input(i
))
371 return dup2(STDIN_FILENO
, STDERR_FILENO
) < 0 ? -errno
: STDERR_FILENO
;
373 /* We don't reset the terminal if this is just about output */
374 return open_terminal_as(tty_path(context
), O_WRONLY
, STDERR_FILENO
);
376 case EXEC_OUTPUT_SYSLOG
:
377 case EXEC_OUTPUT_KERNEL
:
378 return connect_logger_as(context
, e
, ident
, STDERR_FILENO
);
380 case EXEC_OUTPUT_SOCKET
:
381 assert(socket_fd
>= 0);
382 return dup2(socket_fd
, STDERR_FILENO
) < 0 ? -errno
: STDERR_FILENO
;
385 assert_not_reached("Unknown error type");
389 static int chown_terminal(int fd
, uid_t uid
) {
394 /* This might fail. What matters are the results. */
396 fchmod(fd
, TTY_MODE
);
398 if (fstat(fd
, &st
) < 0)
401 if (st
.st_uid
!= uid
|| (st
.st_mode
& 0777) != TTY_MODE
)
407 static int setup_confirm_stdio(const ExecContext
*context
,
409 int *_saved_stdout
) {
410 int fd
= -1, saved_stdin
, saved_stdout
= -1, r
;
413 assert(_saved_stdin
);
414 assert(_saved_stdout
);
416 /* This returns positive EXIT_xxx return values instead of
417 * negative errno style values! */
419 if ((saved_stdin
= fcntl(STDIN_FILENO
, F_DUPFD
, 3)) < 0)
422 if ((saved_stdout
= fcntl(STDOUT_FILENO
, F_DUPFD
, 3)) < 0) {
427 if ((fd
= acquire_terminal(
429 context
->std_input
== EXEC_INPUT_TTY_FAIL
,
430 context
->std_input
== EXEC_INPUT_TTY_FORCE
)) < 0) {
435 if (chown_terminal(fd
, getuid()) < 0) {
440 if (dup2(fd
, STDIN_FILENO
) < 0) {
445 if (dup2(fd
, STDOUT_FILENO
) < 0) {
451 close_nointr_nofail(fd
);
453 *_saved_stdin
= saved_stdin
;
454 *_saved_stdout
= saved_stdout
;
459 if (saved_stdout
>= 0)
460 close_nointr_nofail(saved_stdout
);
462 if (saved_stdin
>= 0)
463 close_nointr_nofail(saved_stdin
);
466 close_nointr_nofail(fd
);
471 static int restore_confirm_stdio(const ExecContext
*context
,
479 assert(*saved_stdin
>= 0);
480 assert(saved_stdout
);
481 assert(*saved_stdout
>= 0);
483 /* This returns positive EXIT_xxx return values instead of
484 * negative errno style values! */
486 if (is_terminal_input(context
->std_input
)) {
488 /* The service wants terminal input. */
492 context
->std_output
== EXEC_OUTPUT_INHERIT
||
493 context
->std_output
== EXEC_OUTPUT_TTY
;
496 /* If the service doesn't want a controlling terminal,
497 * then we need to get rid entirely of what we have
500 if (release_terminal() < 0)
503 if (dup2(*saved_stdin
, STDIN_FILENO
) < 0)
506 if (dup2(*saved_stdout
, STDOUT_FILENO
) < 0)
509 *keep_stdout
= *keep_stdin
= false;
515 static int get_group_creds(const char *groupname
, gid_t
*gid
) {
522 /* We enforce some special rules for gid=0: in order to avoid
523 * NSS lookups for root we hardcode its data. */
525 if (streq(groupname
, "root") || streq(groupname
, "0")) {
530 if (safe_atolu(groupname
, &lu
) >= 0) {
532 g
= getgrgid((gid_t
) lu
);
535 g
= getgrnam(groupname
);
539 return errno
!= 0 ? -errno
: -ESRCH
;
545 static int get_user_creds(const char **username
, uid_t
*uid
, gid_t
*gid
, const char **home
) {
555 /* We enforce some special rules for uid=0: in order to avoid
556 * NSS lookups for root we hardcode its data. */
558 if (streq(*username
, "root") || streq(*username
, "0")) {
566 if (safe_atolu(*username
, &lu
) >= 0) {
568 p
= getpwuid((uid_t
) lu
);
570 /* If there are multiple users with the same id, make
571 * sure to leave $USER to the configured value instead
572 * of the first occurence in the database. However if
573 * the uid was configured by a numeric uid, then let's
574 * pick the real username from /etc/passwd. */
576 *username
= p
->pw_name
;
579 p
= getpwnam(*username
);
583 return errno
!= 0 ? -errno
: -ESRCH
;
591 static int enforce_groups(const ExecContext
*context
, const char *username
, gid_t gid
) {
592 bool keep_groups
= false;
597 /* Lookup and ser GID and supplementary group list. Here too
598 * we avoid NSS lookups for gid=0. */
600 if (context
->group
|| username
) {
603 if ((r
= get_group_creds(context
->group
, &gid
)) < 0)
606 /* First step, initialize groups from /etc/groups */
607 if (username
&& gid
!= 0) {
608 if (initgroups(username
, gid
) < 0)
614 /* Second step, set our gids */
615 if (setresgid(gid
, gid
, gid
) < 0)
619 if (context
->supplementary_groups
) {
624 /* Final step, initialize any manually set supplementary groups */
625 ngroups_max
= (int) sysconf(_SC_NGROUPS_MAX
);
627 if (!(gids
= new(gid_t
, ngroups_max
)))
631 if ((k
= getgroups(ngroups_max
, gids
)) < 0) {
638 STRV_FOREACH(i
, context
->supplementary_groups
) {
640 if (k
>= ngroups_max
) {
645 if ((r
= get_group_creds(*i
, gids
+k
)) < 0) {
653 if (setgroups(k
, gids
) < 0) {
664 static int enforce_user(const ExecContext
*context
, uid_t uid
) {
668 /* Sets (but doesn't lookup) the uid and make sure we keep the
669 * capabilities while doing so. */
671 if (context
->capabilities
) {
673 static const cap_value_t bits
[] = {
674 CAP_SETUID
, /* Necessary so that we can run setresuid() below */
675 CAP_SETPCAP
/* Necessary so that we can set PR_SET_SECUREBITS later on */
678 /* First step: If we need to keep capabilities but
679 * drop privileges we need to make sure we keep our
680 * caps, whiel we drop priviliges. */
682 int sb
= context
->secure_bits
|SECURE_KEEP_CAPS
;
684 if (prctl(PR_GET_SECUREBITS
) != sb
)
685 if (prctl(PR_SET_SECUREBITS
, sb
) < 0)
689 /* Second step: set the capabilites. This will reduce
690 * the capabilities to the minimum we need. */
692 if (!(d
= cap_dup(context
->capabilities
)))
695 if (cap_set_flag(d
, CAP_EFFECTIVE
, ELEMENTSOF(bits
), bits
, CAP_SET
) < 0 ||
696 cap_set_flag(d
, CAP_PERMITTED
, ELEMENTSOF(bits
), bits
, CAP_SET
) < 0) {
702 if (cap_set_proc(d
) < 0) {
711 /* Third step: actually set the uids */
712 if (setresuid(uid
, uid
, uid
) < 0)
715 /* At this point we should have all necessary capabilities but
716 are otherwise a normal user. However, the caps might got
717 corrupted due to the setresuid() so we need clean them up
718 later. This is done outside of this call. */
723 int exec_spawn(ExecCommand
*command
,
725 const ExecContext
*context
,
726 int fds
[], unsigned n_fds
,
727 bool apply_permissions
,
730 CGroupBonding
*cgroup_bondings
,
741 assert(fds
|| n_fds
<= 0);
743 if (context
->std_input
== EXEC_INPUT_SOCKET
||
744 context
->std_output
== EXEC_OUTPUT_SOCKET
||
745 context
->std_error
== EXEC_OUTPUT_SOCKET
) {
758 argv
= command
->argv
;
760 if (!(line
= exec_command_line(argv
)))
763 log_debug("About to execute: %s", line
);
767 if ((r
= cgroup_bonding_realize_list(cgroup_bondings
)))
770 if ((pid
= fork()) < 0)
776 const char *username
= NULL
, *home
= NULL
;
777 uid_t uid
= (uid_t
) -1;
778 gid_t gid
= (gid_t
) -1;
779 char **our_env
= NULL
, **final_env
= NULL
;
781 int saved_stdout
= -1, saved_stdin
= -1;
782 bool keep_stdout
= false, keep_stdin
= false;
786 reset_all_signal_handlers();
788 if (sigemptyset(&ss
) < 0 ||
789 sigprocmask(SIG_SETMASK
, &ss
, NULL
) < 0) {
790 r
= EXIT_SIGNAL_MASK
;
794 if (!context
->no_setsid
)
803 /* Set up terminal for the question */
804 if ((r
= setup_confirm_stdio(context
,
805 &saved_stdin
, &saved_stdout
)))
808 /* Now ask the question. */
809 if (!(line
= exec_command_line(argv
))) {
814 r
= ask(&response
, "yns", "Execute %s? [Yes, No, Skip] ", line
);
817 if (r
< 0 || response
== 'n') {
820 } else if (response
== 's') {
825 /* Release terminal for the question */
826 if ((r
= restore_confirm_stdio(context
,
827 &saved_stdin
, &saved_stdout
,
828 &keep_stdin
, &keep_stdout
)))
833 if (setup_input(context
, socket_fd
) < 0) {
839 if (setup_output(context
, socket_fd
, file_name_from_path(command
->path
)) < 0) {
844 if (setup_error(context
, socket_fd
, file_name_from_path(command
->path
)) < 0) {
850 if ((r
= cgroup_bonding_install_list(cgroup_bondings
, 0)) < 0) {
855 if (context
->oom_adjust_set
) {
858 snprintf(t
, sizeof(t
), "%i", context
->oom_adjust
);
861 if (write_one_line_file("/proc/self/oom_adj", t
) < 0) {
867 if (context
->nice_set
)
868 if (setpriority(PRIO_PROCESS
, 0, context
->nice
) < 0) {
873 if (context
->cpu_sched_set
) {
874 struct sched_param param
;
877 param
.sched_priority
= context
->cpu_sched_priority
;
879 if (sched_setscheduler(0, context
->cpu_sched_policy
|
880 (context
->cpu_sched_reset_on_fork
? SCHED_RESET_ON_FORK
: 0), ¶m
) < 0) {
881 r
= EXIT_SETSCHEDULER
;
886 if (context
->cpu_affinity_set
)
887 if (sched_setaffinity(0, sizeof(context
->cpu_affinity
), &context
->cpu_affinity
) < 0) {
888 r
= EXIT_CPUAFFINITY
;
892 if (context
->ioprio_set
)
893 if (ioprio_set(IOPRIO_WHO_PROCESS
, 0, context
->ioprio
) < 0) {
898 if (context
->timer_slack_ns_set
)
899 if (prctl(PR_SET_TIMERSLACK
, context
->timer_slack_ns_set
) < 0) {
904 if (strv_length(context
->read_write_dirs
) > 0 ||
905 strv_length(context
->read_only_dirs
) > 0 ||
906 strv_length(context
->inaccessible_dirs
) > 0 ||
907 context
->mount_flags
!= MS_SHARED
||
908 context
->private_tmp
)
909 if ((r
= setup_namespace(
910 context
->read_write_dirs
,
911 context
->read_only_dirs
,
912 context
->inaccessible_dirs
,
913 context
->private_tmp
,
914 context
->mount_flags
)) < 0)
918 username
= context
->user
;
919 if (get_user_creds(&username
, &uid
, &gid
, &home
) < 0) {
924 if (is_terminal_input(context
->std_input
))
925 if (chown_terminal(STDIN_FILENO
, uid
) < 0) {
931 if (apply_permissions
)
932 if (enforce_groups(context
, username
, uid
) < 0) {
937 umask(context
->umask
);
940 if (context
->root_directory
)
941 if (chroot(context
->root_directory
) < 0) {
946 if (chdir(context
->working_directory
? context
->working_directory
: "/") < 0) {
954 if (asprintf(&d
, "%s/%s",
955 context
->root_directory
? context
->root_directory
: "",
956 context
->working_directory
? context
->working_directory
: "") < 0) {
970 if (close_all_fds(fds
, n_fds
) < 0 ||
971 shift_fds(fds
, n_fds
) < 0 ||
972 flags_fds(fds
, n_fds
, context
->non_blocking
) < 0) {
977 if (apply_permissions
) {
979 for (i
= 0; i
< RLIMIT_NLIMITS
; i
++) {
980 if (!context
->rlimit
[i
])
983 if (setrlimit(i
, context
->rlimit
[i
]) < 0) {
990 if (enforce_user(context
, uid
) < 0) {
995 /* PR_GET_SECUREBITS is not priviliged, while
996 * PR_SET_SECUREBITS is. So to suppress
997 * potential EPERMs we'll try not to call
998 * PR_SET_SECUREBITS unless necessary. */
999 if (prctl(PR_GET_SECUREBITS
) != context
->secure_bits
)
1000 if (prctl(PR_SET_SECUREBITS
, context
->secure_bits
) < 0) {
1001 r
= EXIT_SECUREBITS
;
1005 if (context
->capabilities
)
1006 if (cap_set_proc(context
->capabilities
) < 0) {
1007 r
= EXIT_CAPABILITIES
;
1012 if (!(our_env
= new0(char*, 6))) {
1018 if (asprintf(our_env
+ n_env
++, "LISTEN_PID=%llu", (unsigned long long) getpid()) < 0 ||
1019 asprintf(our_env
+ n_env
++, "LISTEN_FDS=%u", n_fds
) < 0) {
1025 if (asprintf(our_env
+ n_env
++, "HOME=%s", home
) < 0) {
1031 if (asprintf(our_env
+ n_env
++, "LOGNAME=%s", username
) < 0 ||
1032 asprintf(our_env
+ n_env
++, "USER=%s", username
) < 0) {
1037 if (!(final_env
= strv_env_merge(environ
, our_env
, context
->environment
, NULL
))) {
1042 execve(command
->path
, argv
, final_env
);
1047 strv_free(final_env
);
1049 if (saved_stdin
>= 0)
1050 close_nointr_nofail(saved_stdin
);
1052 if (saved_stdout
>= 0)
1053 close_nointr_nofail(saved_stdout
);
1058 /* We add the new process to the cgroup both in the child (so
1059 * that we can be sure that no user code is ever executed
1060 * outside of the cgroup) and in the parent (so that we can be
1061 * sure that when we kill the cgroup the process will be
1063 if (cgroup_bondings
)
1064 if ((r
= cgroup_bonding_install_list(cgroup_bondings
, pid
)) < 0) {
1069 log_debug("Forked %s as %llu", command
->path
, (unsigned long long) pid
);
1071 command
->exec_status
.pid
= pid
;
1072 command
->exec_status
.start_timestamp
= now(CLOCK_REALTIME
);
1078 void exec_context_init(ExecContext
*c
) {
1082 c
->ioprio
= IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE
, 0);
1083 c
->cpu_sched_policy
= SCHED_OTHER
;
1084 c
->syslog_priority
= LOG_DAEMON
|LOG_INFO
;
1085 c
->mount_flags
= MS_SHARED
;
1088 void exec_context_done(ExecContext
*c
) {
1093 strv_free(c
->environment
);
1094 c
->environment
= NULL
;
1096 for (l
= 0; l
< ELEMENTSOF(c
->rlimit
); l
++) {
1098 c
->rlimit
[l
] = NULL
;
1101 free(c
->working_directory
);
1102 c
->working_directory
= NULL
;
1103 free(c
->root_directory
);
1104 c
->root_directory
= NULL
;
1109 free(c
->syslog_identifier
);
1110 c
->syslog_identifier
= NULL
;
1118 strv_free(c
->supplementary_groups
);
1119 c
->supplementary_groups
= NULL
;
1121 if (c
->capabilities
) {
1122 cap_free(c
->capabilities
);
1123 c
->capabilities
= NULL
;
1126 strv_free(c
->read_only_dirs
);
1127 c
->read_only_dirs
= NULL
;
1129 strv_free(c
->read_write_dirs
);
1130 c
->read_write_dirs
= NULL
;
1132 strv_free(c
->inaccessible_dirs
);
1133 c
->inaccessible_dirs
= NULL
;
1136 void exec_command_done(ExecCommand
*c
) {
1146 void exec_command_done_array(ExecCommand
*c
, unsigned n
) {
1149 for (i
= 0; i
< n
; i
++)
1150 exec_command_done(c
+i
);
1153 void exec_command_free_list(ExecCommand
*c
) {
1157 LIST_REMOVE(ExecCommand
, command
, c
, i
);
1158 exec_command_done(i
);
1163 void exec_command_free_array(ExecCommand
**c
, unsigned n
) {
1166 for (i
= 0; i
< n
; i
++) {
1167 exec_command_free_list(c
[i
]);
1172 static void strv_fprintf(FILE *f
, char **l
) {
1178 fprintf(f
, " %s", *g
);
1181 void exec_context_dump(ExecContext
*c
, FILE* f
, const char *prefix
) {
1193 "%sWorkingDirectory: %s\n"
1194 "%sRootDirectory: %s\n"
1195 "%sNonBlocking: %s\n"
1196 "%sPrivateTmp: %s\n",
1198 prefix
, c
->working_directory
? c
->working_directory
: "/",
1199 prefix
, c
->root_directory
? c
->root_directory
: "/",
1200 prefix
, yes_no(c
->non_blocking
),
1201 prefix
, yes_no(c
->private_tmp
));
1204 for (e
= c
->environment
; *e
; e
++)
1205 fprintf(f
, "%sEnvironment: %s\n", prefix
, *e
);
1212 if (c
->oom_adjust_set
)
1214 "%sOOMAdjust: %i\n",
1215 prefix
, c
->oom_adjust
);
1217 for (i
= 0; i
< RLIM_NLIMITS
; i
++)
1219 fprintf(f
, "%s%s: %llu\n", prefix
, rlimit_to_string(i
), (unsigned long long) c
->rlimit
[i
]->rlim_max
);
1223 "%sIOSchedulingClass: %s\n"
1224 "%sIOPriority: %i\n",
1225 prefix
, ioprio_class_to_string(IOPRIO_PRIO_CLASS(c
->ioprio
)),
1226 prefix
, (int) IOPRIO_PRIO_DATA(c
->ioprio
));
1228 if (c
->cpu_sched_set
)
1230 "%sCPUSchedulingPolicy: %s\n"
1231 "%sCPUSchedulingPriority: %i\n"
1232 "%sCPUSchedulingResetOnFork: %s\n",
1233 prefix
, sched_policy_to_string(c
->cpu_sched_policy
),
1234 prefix
, c
->cpu_sched_priority
,
1235 prefix
, yes_no(c
->cpu_sched_reset_on_fork
));
1237 if (c
->cpu_affinity_set
) {
1238 fprintf(f
, "%sCPUAffinity:", prefix
);
1239 for (i
= 0; i
< CPU_SETSIZE
; i
++)
1240 if (CPU_ISSET(i
, &c
->cpu_affinity
))
1241 fprintf(f
, " %i", i
);
1245 if (c
->timer_slack_ns_set
)
1246 fprintf(f
, "%sTimerSlackNS: %lu\n", prefix
, c
->timer_slack_ns
);
1249 "%sStandardInput: %s\n"
1250 "%sStandardOutput: %s\n"
1251 "%sStandardError: %s\n",
1252 prefix
, exec_input_to_string(c
->std_input
),
1253 prefix
, exec_output_to_string(c
->std_output
),
1254 prefix
, exec_output_to_string(c
->std_error
));
1259 prefix
, c
->tty_path
);
1261 if (c
->std_output
== EXEC_OUTPUT_SYSLOG
|| c
->std_output
== EXEC_OUTPUT_KERNEL
||
1262 c
->std_error
== EXEC_OUTPUT_SYSLOG
|| c
->std_error
== EXEC_OUTPUT_KERNEL
)
1264 "%sSyslogFacility: %s\n"
1265 "%sSyslogLevel: %s\n",
1266 prefix
, log_facility_to_string(LOG_FAC(c
->syslog_priority
)),
1267 prefix
, log_level_to_string(LOG_PRI(c
->syslog_priority
)));
1269 if (c
->capabilities
) {
1271 if ((t
= cap_to_text(c
->capabilities
, NULL
))) {
1272 fprintf(f
, "%sCapabilities: %s\n",
1279 fprintf(f
, "%sSecure Bits:%s%s%s%s%s%s\n",
1281 (c
->secure_bits
& SECURE_KEEP_CAPS
) ? " keep-caps" : "",
1282 (c
->secure_bits
& SECURE_KEEP_CAPS_LOCKED
) ? " keep-caps-locked" : "",
1283 (c
->secure_bits
& SECURE_NO_SETUID_FIXUP
) ? " no-setuid-fixup" : "",
1284 (c
->secure_bits
& SECURE_NO_SETUID_FIXUP_LOCKED
) ? " no-setuid-fixup-locked" : "",
1285 (c
->secure_bits
& SECURE_NOROOT
) ? " noroot" : "",
1286 (c
->secure_bits
& SECURE_NOROOT_LOCKED
) ? "noroot-locked" : "");
1288 if (c
->capability_bounding_set_drop
) {
1289 fprintf(f
, "%sCapabilityBoundingSetDrop:", prefix
);
1291 for (i
= 0; i
<= CAP_LAST_CAP
; i
++)
1292 if (c
->capability_bounding_set_drop
& (1 << i
)) {
1295 if ((t
= cap_to_name(i
))) {
1296 fprintf(f
, " %s", t
);
1305 fprintf(f
, "%sUser: %s", prefix
, c
->user
);
1307 fprintf(f
, "%sGroup: %s", prefix
, c
->group
);
1309 if (strv_length(c
->supplementary_groups
) > 0) {
1310 fprintf(f
, "%sSupplementaryGroups:", prefix
);
1311 strv_fprintf(f
, c
->supplementary_groups
);
1315 if (strv_length(c
->read_write_dirs
) > 0) {
1316 fprintf(f
, "%sReadWriteDirs:", prefix
);
1317 strv_fprintf(f
, c
->read_write_dirs
);
1321 if (strv_length(c
->read_only_dirs
) > 0) {
1322 fprintf(f
, "%sReadOnlyDirs:", prefix
);
1323 strv_fprintf(f
, c
->read_only_dirs
);
1327 if (strv_length(c
->inaccessible_dirs
) > 0) {
1328 fprintf(f
, "%sInaccessibleDirs:", prefix
);
1329 strv_fprintf(f
, c
->inaccessible_dirs
);
1334 void exec_status_fill(ExecStatus
*s
, pid_t pid
, int code
, int status
) {
1338 s
->exit_timestamp
= now(CLOCK_REALTIME
);
1344 void exec_status_dump(ExecStatus
*s
, FILE *f
, const char *prefix
) {
1345 char buf
[FORMAT_TIMESTAMP_MAX
];
1358 prefix
, (unsigned long long) s
->pid
);
1360 if (s
->start_timestamp
> 0)
1362 "%sStart Timestamp: %s\n",
1363 prefix
, format_timestamp(buf
, sizeof(buf
), s
->start_timestamp
));
1365 if (s
->exit_timestamp
> 0)
1367 "%sExit Timestamp: %s\n"
1369 "%sExit Status: %i\n",
1370 prefix
, format_timestamp(buf
, sizeof(buf
), s
->exit_timestamp
),
1371 prefix
, sigchld_code_to_string(s
->code
),
1375 char *exec_command_line(char **argv
) {
1383 STRV_FOREACH(a
, argv
)
1386 if (!(n
= new(char, k
)))
1390 STRV_FOREACH(a
, argv
) {
1397 if (strpbrk(*a
, WHITESPACE
)) {
1408 /* FIXME: this doesn't really handle arguments that have
1409 * spaces and ticks in them */
1414 void exec_command_dump(ExecCommand
*c
, FILE *f
, const char *prefix
) {
1416 const char *prefix2
;
1425 p2
= strappend(prefix
, "\t");
1426 prefix2
= p2
? p2
: prefix
;
1428 cmd
= exec_command_line(c
->argv
);
1431 "%sCommand Line: %s\n",
1432 prefix
, cmd
? cmd
: strerror(ENOMEM
));
1436 exec_status_dump(&c
->exec_status
, f
, prefix2
);
1441 void exec_command_dump_list(ExecCommand
*c
, FILE *f
, const char *prefix
) {
1447 LIST_FOREACH(command
, c
, c
)
1448 exec_command_dump(c
, f
, prefix
);
1451 void exec_command_append_list(ExecCommand
**l
, ExecCommand
*e
) {
1458 /* It's kinda important that we keep the order here */
1459 LIST_FIND_TAIL(ExecCommand
, command
, *l
, end
);
1460 LIST_INSERT_AFTER(ExecCommand
, command
, *l
, end
, e
);
1465 int exec_command_set(ExecCommand
*c
, const char *path
, ...) {
1473 l
= strv_new_ap(path
, ap
);
1479 if (!(p
= strdup(path
))) {
1493 const char* exit_status_to_string(ExitStatus status
) {
1495 /* We cast to int here, so that -Wenum doesn't complain that
1496 * EXIT_SUCCESS/EXIT_FAILURE aren't in the enum */
1498 switch ((int) status
) {
1506 case EXIT_INVALIDARGUMENT
:
1507 return "INVALIDARGUMENT";
1509 case EXIT_NOTIMPLEMENTED
:
1510 return "NOTIMPLEMENTED";
1512 case EXIT_NOPERMISSION
:
1513 return "NOPERMISSION";
1515 case EXIT_NOTINSTALLED
:
1516 return "NOTINSSTALLED";
1518 case EXIT_NOTCONFIGURED
:
1519 return "NOTCONFIGURED";
1521 case EXIT_NOTRUNNING
:
1522 return "NOTRUNNING";
1542 case EXIT_OOM_ADJUST
:
1543 return "OOM_ADJUST";
1545 case EXIT_SIGNAL_MASK
:
1546 return "SIGNAL_MASK";
1560 case EXIT_TIMERSLACK
:
1561 return "TIMERSLACK";
1563 case EXIT_SECUREBITS
:
1564 return "SECUREBITS";
1566 case EXIT_SETSCHEDULER
:
1567 return "SETSCHEDULER";
1569 case EXIT_CPUAFFINITY
:
1570 return "CPUAFFINITY";
1578 case EXIT_CAPABILITIES
:
1579 return "CAPABILITIES";
1598 static const char* const exec_input_table
[_EXEC_INPUT_MAX
] = {
1599 [EXEC_INPUT_NULL
] = "null",
1600 [EXEC_INPUT_TTY
] = "tty",
1601 [EXEC_INPUT_TTY_FORCE
] = "tty-force",
1602 [EXEC_INPUT_TTY_FAIL
] = "tty-fail",
1603 [EXEC_INPUT_SOCKET
] = "socket"
1606 static const char* const exec_output_table
[_EXEC_OUTPUT_MAX
] = {
1607 [EXEC_OUTPUT_INHERIT
] = "inherit",
1608 [EXEC_OUTPUT_NULL
] = "null",
1609 [EXEC_OUTPUT_TTY
] = "tty",
1610 [EXEC_OUTPUT_SYSLOG
] = "syslog",
1611 [EXEC_OUTPUT_KERNEL
] = "kernel",
1612 [EXEC_OUTPUT_SOCKET
] = "socket"
1615 DEFINE_STRING_TABLE_LOOKUP(exec_output
, ExecOutput
);
1617 DEFINE_STRING_TABLE_LOOKUP(exec_input
, ExecInput
);