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>
44 #include "securebits.h"
47 /* This assumes there is a 'tty' group */
50 static int shift_fds(int fds
[], unsigned n_fds
) {
51 int start
, restart_from
;
56 /* Modifies the fds array! (sorts it) */
66 for (i
= start
; i
< (int) n_fds
; i
++) {
69 /* Already at right index? */
73 if ((nfd
= fcntl(fds
[i
], F_DUPFD
, i
+3)) < 0)
76 close_nointr_nofail(fds
[i
]);
79 /* Hmm, the fd we wanted isn't free? Then
80 * let's remember that and try again from here*/
81 if (nfd
!= i
+3 && restart_from
< 0)
94 static int flags_fds(const int fds
[], unsigned n_fds
, bool nonblock
) {
103 /* Drops/Sets O_NONBLOCK and FD_CLOEXEC from the file flags */
105 for (i
= 0; i
< n_fds
; i
++) {
107 if ((r
= fd_nonblock(fds
[i
], nonblock
)) < 0)
110 /* We unconditionally drop FD_CLOEXEC from the fds,
111 * since after all we want to pass these fds to our
114 if ((r
= fd_cloexec(fds
[i
], false)) < 0)
121 static const char *tty_path(const ExecContext
*context
) {
124 if (context
->tty_path
)
125 return context
->tty_path
;
127 return "/dev/console";
130 static int open_null_as(int flags
, int nfd
) {
135 if ((fd
= open("/dev/null", flags
|O_NOCTTY
)) < 0)
139 r
= dup2(fd
, nfd
) < 0 ? -errno
: nfd
;
140 close_nointr_nofail(fd
);
147 static int connect_logger_as(const ExecContext
*context
, ExecOutput output
, const char *ident
, int nfd
) {
151 struct sockaddr_un un
;
155 assert(output
< _EXEC_OUTPUT_MAX
);
159 if ((fd
= socket(AF_UNIX
, SOCK_STREAM
, 0)) < 0)
163 sa
.sa
.sa_family
= AF_UNIX
;
164 strncpy(sa
.un
.sun_path
+1, LOGGER_SOCKET
, sizeof(sa
.un
.sun_path
)-1);
166 if (connect(fd
, &sa
.sa
, sizeof(sa
)) < 0) {
167 close_nointr_nofail(fd
);
171 if (shutdown(fd
, SHUT_RD
) < 0) {
172 close_nointr_nofail(fd
);
176 /* We speak a very simple protocol between log server
177 * and client: one line for the log destination (kmsg
178 * or syslog), followed by the priority field,
179 * followed by the process name. Since we replaced
180 * stdin/stderr we simple use stdio to write to
181 * it. Note that we use stderr, to minimize buffer
182 * flushing issues. */
188 output
== EXEC_OUTPUT_KERNEL
? "kmsg" : "syslog",
189 context
->syslog_priority
,
190 context
->syslog_identifier
? context
->syslog_identifier
: ident
);
193 r
= dup2(fd
, nfd
) < 0 ? -errno
: nfd
;
194 close_nointr_nofail(fd
);
200 static int open_terminal_as(const char *path
, mode_t mode
, int nfd
) {
206 if ((fd
= open_terminal(path
, mode
| O_NOCTTY
)) < 0)
210 r
= dup2(fd
, nfd
) < 0 ? -errno
: nfd
;
211 close_nointr_nofail(fd
);
218 static bool is_terminal_input(ExecInput i
) {
220 i
== EXEC_INPUT_TTY
||
221 i
== EXEC_INPUT_TTY_FORCE
||
222 i
== EXEC_INPUT_TTY_FAIL
;
225 static int fixup_input(const ExecContext
*context
, int socket_fd
) {
228 if (socket_fd
< 0 && context
->std_input
== EXEC_INPUT_SOCKET
)
229 return EXEC_INPUT_NULL
;
231 return context
->std_input
;
234 static int fixup_output(const ExecContext
*context
, int socket_fd
) {
237 if (socket_fd
< 0 && context
->std_output
== EXEC_OUTPUT_SOCKET
)
238 return EXEC_OUTPUT_INHERIT
;
240 return context
->std_output
;
243 static int fixup_error(const ExecContext
*context
, int socket_fd
) {
246 if (socket_fd
< 0 && context
->std_error
== EXEC_OUTPUT_SOCKET
)
247 return EXEC_OUTPUT_INHERIT
;
249 return context
->std_error
;
252 static int setup_input(const ExecContext
*context
, int socket_fd
) {
257 i
= fixup_input(context
, socket_fd
);
261 case EXEC_INPUT_NULL
:
262 return open_null_as(O_RDONLY
, STDIN_FILENO
);
265 case EXEC_INPUT_TTY_FORCE
:
266 case EXEC_INPUT_TTY_FAIL
: {
269 if ((fd
= acquire_terminal(
271 i
== EXEC_INPUT_TTY_FAIL
,
272 i
== EXEC_INPUT_TTY_FORCE
)) < 0)
275 if (fd
!= STDIN_FILENO
) {
276 r
= dup2(fd
, STDIN_FILENO
) < 0 ? -errno
: STDIN_FILENO
;
277 close_nointr_nofail(fd
);
284 case EXEC_INPUT_SOCKET
:
285 return dup2(socket_fd
, STDIN_FILENO
) < 0 ? -errno
: STDIN_FILENO
;
288 assert_not_reached("Unknown input type");
292 static int setup_output(const ExecContext
*context
, int socket_fd
, const char *ident
) {
299 i
= fixup_input(context
, socket_fd
);
300 o
= fixup_output(context
, socket_fd
);
302 /* This expects the input is already set up */
306 case EXEC_OUTPUT_INHERIT
:
308 /* If the input is connected to a terminal, inherit that... */
309 if (is_terminal_input(i
) || i
== EXEC_INPUT_SOCKET
)
310 return dup2(STDIN_FILENO
, STDOUT_FILENO
) < 0 ? -errno
: STDOUT_FILENO
;
314 case EXEC_OUTPUT_NULL
:
315 return open_null_as(O_WRONLY
, STDOUT_FILENO
);
317 case EXEC_OUTPUT_TTY
:
318 if (is_terminal_input(i
))
319 return dup2(STDIN_FILENO
, STDOUT_FILENO
) < 0 ? -errno
: STDOUT_FILENO
;
321 /* We don't reset the terminal if this is just about output */
322 return open_terminal_as(tty_path(context
), O_WRONLY
, STDOUT_FILENO
);
324 case EXEC_OUTPUT_SYSLOG
:
325 case EXEC_OUTPUT_KERNEL
:
326 return connect_logger_as(context
, o
, ident
, STDOUT_FILENO
);
328 case EXEC_OUTPUT_SOCKET
:
329 assert(socket_fd
>= 0);
330 return dup2(socket_fd
, STDOUT_FILENO
) < 0 ? -errno
: STDOUT_FILENO
;
333 assert_not_reached("Unknown output type");
337 static int setup_error(const ExecContext
*context
, int socket_fd
, const char *ident
) {
344 i
= fixup_input(context
, socket_fd
);
345 o
= fixup_output(context
, socket_fd
);
346 e
= fixup_error(context
, socket_fd
);
348 /* This expects the input and output are already set up */
350 /* Don't change the stderr file descriptor if we inherit all
351 * the way and are not on a tty */
352 if (e
== EXEC_OUTPUT_INHERIT
&&
353 o
== EXEC_OUTPUT_INHERIT
&&
354 !is_terminal_input(i
))
355 return STDERR_FILENO
;
357 /* Duplicate form stdout if possible */
358 if (e
== o
|| e
== EXEC_OUTPUT_INHERIT
)
359 return dup2(STDOUT_FILENO
, STDERR_FILENO
) < 0 ? -errno
: STDERR_FILENO
;
363 case EXEC_OUTPUT_NULL
:
364 return open_null_as(O_WRONLY
, STDERR_FILENO
);
366 case EXEC_OUTPUT_TTY
:
367 if (is_terminal_input(i
))
368 return dup2(STDIN_FILENO
, STDERR_FILENO
) < 0 ? -errno
: STDERR_FILENO
;
370 /* We don't reset the terminal if this is just about output */
371 return open_terminal_as(tty_path(context
), O_WRONLY
, STDERR_FILENO
);
373 case EXEC_OUTPUT_SYSLOG
:
374 case EXEC_OUTPUT_KERNEL
:
375 return connect_logger_as(context
, e
, ident
, STDERR_FILENO
);
377 case EXEC_OUTPUT_SOCKET
:
378 assert(socket_fd
>= 0);
379 return dup2(socket_fd
, STDERR_FILENO
) < 0 ? -errno
: STDERR_FILENO
;
382 assert_not_reached("Unknown error type");
386 static int chown_terminal(int fd
, uid_t uid
) {
391 /* This might fail. What matters are the results. */
393 fchmod(fd
, TTY_MODE
);
395 if (fstat(fd
, &st
) < 0)
398 if (st
.st_uid
!= uid
|| (st
.st_mode
& 0777) != TTY_MODE
)
404 static int setup_confirm_stdio(const ExecContext
*context
,
406 int *_saved_stdout
) {
407 int fd
= -1, saved_stdin
, saved_stdout
= -1, r
;
410 assert(_saved_stdin
);
411 assert(_saved_stdout
);
413 /* This returns positive EXIT_xxx return values instead of
414 * negative errno style values! */
416 if ((saved_stdin
= fcntl(STDIN_FILENO
, F_DUPFD
, 3)) < 0)
419 if ((saved_stdout
= fcntl(STDOUT_FILENO
, F_DUPFD
, 3)) < 0) {
424 if ((fd
= acquire_terminal(
426 context
->std_input
== EXEC_INPUT_TTY_FAIL
,
427 context
->std_input
== EXEC_INPUT_TTY_FORCE
)) < 0) {
432 if (chown_terminal(fd
, getuid()) < 0) {
437 if (dup2(fd
, STDIN_FILENO
) < 0) {
442 if (dup2(fd
, STDOUT_FILENO
) < 0) {
448 close_nointr_nofail(fd
);
450 *_saved_stdin
= saved_stdin
;
451 *_saved_stdout
= saved_stdout
;
456 if (saved_stdout
>= 0)
457 close_nointr_nofail(saved_stdout
);
459 if (saved_stdin
>= 0)
460 close_nointr_nofail(saved_stdin
);
463 close_nointr_nofail(fd
);
468 static int restore_conform_stdio(const ExecContext
*context
,
476 assert(*saved_stdin
>= 0);
477 assert(saved_stdout
);
478 assert(*saved_stdout
>= 0);
480 /* This returns positive EXIT_xxx return values instead of
481 * negative errno style values! */
483 if (is_terminal_input(context
->std_input
)) {
485 /* The service wants terminal input. */
489 context
->std_output
== EXEC_OUTPUT_INHERIT
||
490 context
->std_output
== EXEC_OUTPUT_TTY
;
493 /* If the service doesn't want a controlling terminal,
494 * then we need to get rid entirely of what we have
497 if (release_terminal() < 0)
500 if (dup2(*saved_stdin
, STDIN_FILENO
) < 0)
503 if (dup2(*saved_stdout
, STDOUT_FILENO
) < 0)
506 *keep_stdout
= *keep_stdin
= false;
512 static int get_group_creds(const char *groupname
, gid_t
*gid
) {
519 /* We enforce some special rules for gid=0: in order to avoid
520 * NSS lookups for root we hardcode its data. */
522 if (streq(groupname
, "root") || streq(groupname
, "0")) {
527 if (safe_atolu(groupname
, &lu
) >= 0) {
529 g
= getgrgid((gid_t
) lu
);
532 g
= getgrnam(groupname
);
536 return errno
!= 0 ? -errno
: -ESRCH
;
542 static int get_user_creds(const char **username
, uid_t
*uid
, gid_t
*gid
, const char **home
) {
552 /* We enforce some special rules for uid=0: in order to avoid
553 * NSS lookups for root we hardcode its data. */
555 if (streq(*username
, "root") || streq(*username
, "0")) {
563 if (safe_atolu(*username
, &lu
) >= 0) {
565 p
= getpwuid((uid_t
) lu
);
567 /* If there are multiple users with the same id, make
568 * sure to leave $USER to the configured value instead
569 * of the first occurence in the database. However if
570 * the uid was configured by a numeric uid, then let's
571 * pick the real username from /etc/passwd. */
573 *username
= p
->pw_name
;
576 p
= getpwnam(*username
);
580 return errno
!= 0 ? -errno
: -ESRCH
;
588 static int enforce_groups(const ExecContext
*context
, const char *username
, gid_t gid
) {
589 bool keep_groups
= false;
594 /* Lookup and ser GID and supplementary group list. Here too
595 * we avoid NSS lookups for gid=0. */
597 if (context
->group
|| username
) {
600 if ((r
= get_group_creds(context
->group
, &gid
)) < 0)
603 /* First step, initialize groups from /etc/groups */
604 if (username
&& gid
!= 0) {
605 if (initgroups(username
, gid
) < 0)
611 /* Second step, set our gids */
612 if (setresgid(gid
, gid
, gid
) < 0)
616 if (context
->supplementary_groups
) {
621 /* Final step, initialize any manually set supplementary groups */
622 ngroups_max
= (int) sysconf(_SC_NGROUPS_MAX
);
624 if (!(gids
= new(gid_t
, ngroups_max
)))
628 if ((k
= getgroups(ngroups_max
, gids
)) < 0) {
635 STRV_FOREACH(i
, context
->supplementary_groups
) {
637 if (k
>= ngroups_max
) {
642 if ((r
= get_group_creds(*i
, gids
+k
)) < 0) {
650 if (setgroups(k
, gids
) < 0) {
661 static int enforce_user(const ExecContext
*context
, uid_t uid
) {
665 /* Sets (but doesn't lookup) the uid and make sure we keep the
666 * capabilities while doing so. */
668 if (context
->capabilities
) {
670 static const cap_value_t bits
[] = {
671 CAP_SETUID
, /* Necessary so that we can run setresuid() below */
672 CAP_SETPCAP
/* Necessary so that we can set PR_SET_SECUREBITS later on */
675 /* First step: If we need to keep capabilities but
676 * drop privileges we need to make sure we keep our
677 * caps, whiel we drop priviliges. */
679 int sb
= context
->secure_bits
|SECURE_KEEP_CAPS
;
681 if (prctl(PR_GET_SECUREBITS
) != sb
)
682 if (prctl(PR_SET_SECUREBITS
, sb
) < 0)
686 /* Second step: set the capabilites. This will reduce
687 * the capabilities to the minimum we need. */
689 if (!(d
= cap_dup(context
->capabilities
)))
692 if (cap_set_flag(d
, CAP_EFFECTIVE
, ELEMENTSOF(bits
), bits
, CAP_SET
) < 0 ||
693 cap_set_flag(d
, CAP_PERMITTED
, ELEMENTSOF(bits
), bits
, CAP_SET
) < 0) {
699 if (cap_set_proc(d
) < 0) {
708 /* Third step: actually set the uids */
709 if (setresuid(uid
, uid
, uid
) < 0)
712 /* At this point we should have all necessary capabilities but
713 are otherwise a normal user. However, the caps might got
714 corrupted due to the setresuid() so we need clean them up
715 later. This is done outside of this call. */
720 int exec_spawn(ExecCommand
*command
,
722 const ExecContext
*context
,
723 int fds
[], unsigned n_fds
,
724 bool apply_permissions
,
727 CGroupBonding
*cgroup_bondings
,
738 assert(fds
|| n_fds
<= 0);
740 if (context
->std_input
== EXEC_INPUT_SOCKET
||
741 context
->std_output
== EXEC_OUTPUT_SOCKET
||
742 context
->std_error
== EXEC_OUTPUT_SOCKET
) {
755 argv
= command
->argv
;
757 if (!(line
= exec_command_line(argv
)))
760 log_debug("About to execute: %s", line
);
764 if ((r
= cgroup_bonding_realize_list(cgroup_bondings
)))
767 if ((pid
= fork()) < 0)
773 const char *username
= NULL
, *home
= NULL
;
774 uid_t uid
= (uid_t
) -1;
775 gid_t gid
= (gid_t
) -1;
776 char **our_env
= NULL
, **final_env
= NULL
;
778 int saved_stdout
= -1, saved_stdin
= -1;
779 bool keep_stdout
= false, keep_stdin
= false;
783 reset_all_signal_handlers();
785 if (sigemptyset(&ss
) < 0 ||
786 sigprocmask(SIG_SETMASK
, &ss
, NULL
) < 0) {
787 r
= EXIT_SIGNAL_MASK
;
791 if (!context
->no_setsid
)
797 umask(context
->umask
);
802 /* Set up terminal for the question */
803 if ((r
= setup_confirm_stdio(context
,
804 &saved_stdin
, &saved_stdout
)))
807 /* Now ask the question. */
808 if (!(line
= exec_command_line(argv
))) {
813 r
= ask(&response
, "yns", "Execute %s? [Yes, No, Skip] ", line
);
816 if (r
< 0 || response
== 'n') {
819 } else if (response
== 's') {
824 /* Release terminal for the question */
825 if ((r
= restore_conform_stdio(context
,
826 &saved_stdin
, &saved_stdout
,
827 &keep_stdin
, &keep_stdout
)))
832 if (setup_input(context
, socket_fd
) < 0) {
838 if (setup_output(context
, socket_fd
, file_name_from_path(command
->path
)) < 0) {
843 if (setup_error(context
, socket_fd
, file_name_from_path(command
->path
)) < 0) {
849 if ((r
= cgroup_bonding_install_list(cgroup_bondings
, 0)) < 0) {
854 if (context
->oom_adjust_set
) {
857 snprintf(t
, sizeof(t
), "%i", context
->oom_adjust
);
860 if (write_one_line_file("/proc/self/oom_adj", t
) < 0) {
866 if (context
->nice_set
)
867 if (setpriority(PRIO_PROCESS
, 0, context
->nice
) < 0) {
872 if (context
->cpu_sched_set
) {
873 struct sched_param param
;
876 param
.sched_priority
= context
->cpu_sched_priority
;
878 if (sched_setscheduler(0, context
->cpu_sched_policy
|
879 (context
->cpu_sched_reset_on_fork
? SCHED_RESET_ON_FORK
: 0), ¶m
) < 0) {
880 r
= EXIT_SETSCHEDULER
;
885 if (context
->cpu_affinity_set
)
886 if (sched_setaffinity(0, sizeof(context
->cpu_affinity
), &context
->cpu_affinity
) < 0) {
887 r
= EXIT_CPUAFFINITY
;
891 if (context
->ioprio_set
)
892 if (ioprio_set(IOPRIO_WHO_PROCESS
, 0, context
->ioprio
) < 0) {
897 if (context
->timer_slack_ns_set
)
898 if (prctl(PR_SET_TIMERSLACK
, context
->timer_slack_ns_set
) < 0) {
904 username
= context
->user
;
905 if (get_user_creds(&username
, &uid
, &gid
, &home
) < 0) {
910 if (is_terminal_input(context
->std_input
))
911 if (chown_terminal(STDIN_FILENO
, uid
) < 0) {
917 if (apply_permissions
)
918 if (enforce_groups(context
, username
, uid
) < 0) {
924 if (context
->root_directory
)
925 if (chroot(context
->root_directory
) < 0) {
930 if (chdir(context
->working_directory
? context
->working_directory
: "/") < 0) {
938 if (asprintf(&d
, "%s/%s",
939 context
->root_directory
? context
->root_directory
: "",
940 context
->working_directory
? context
->working_directory
: "") < 0) {
954 if (close_all_fds(fds
, n_fds
) < 0 ||
955 shift_fds(fds
, n_fds
) < 0 ||
956 flags_fds(fds
, n_fds
, context
->non_blocking
) < 0) {
961 if (apply_permissions
) {
963 for (i
= 0; i
< RLIMIT_NLIMITS
; i
++) {
964 if (!context
->rlimit
[i
])
967 if (setrlimit(i
, context
->rlimit
[i
]) < 0) {
974 if (enforce_user(context
, uid
) < 0) {
979 /* PR_GET_SECUREBITS is not priviliged, while
980 * PR_SET_SECUREBITS is. So to suppress
981 * potential EPERMs we'll try not to call
982 * PR_SET_SECUREBITS unless necessary. */
983 if (prctl(PR_GET_SECUREBITS
) != context
->secure_bits
)
984 if (prctl(PR_SET_SECUREBITS
, context
->secure_bits
) < 0) {
989 if (context
->capabilities
)
990 if (cap_set_proc(context
->capabilities
) < 0) {
991 r
= EXIT_CAPABILITIES
;
996 if (!(our_env
= new0(char*, 6))) {
1002 if (asprintf(our_env
+ n_env
++, "LISTEN_PID=%llu", (unsigned long long) getpid()) < 0 ||
1003 asprintf(our_env
+ n_env
++, "LISTEN_FDS=%u", n_fds
) < 0) {
1009 if (asprintf(our_env
+ n_env
++, "HOME=%s", home
) < 0) {
1015 if (asprintf(our_env
+ n_env
++, "LOGNAME=%s", username
) < 0 ||
1016 asprintf(our_env
+ n_env
++, "USER=%s", username
) < 0) {
1021 if (!(final_env
= strv_env_merge(environ
, our_env
, context
->environment
, NULL
))) {
1026 execve(command
->path
, argv
, final_env
);
1031 strv_free(final_env
);
1033 if (saved_stdin
>= 0)
1034 close_nointr_nofail(saved_stdin
);
1036 if (saved_stdout
>= 0)
1037 close_nointr_nofail(saved_stdout
);
1042 /* We add the new process to the cgroup both in the child (so
1043 * that we can be sure that no user code is ever executed
1044 * outside of the cgroup) and in the parent (so that we can be
1045 * sure that when we kill the cgroup the process will be
1047 if (cgroup_bondings
)
1048 if ((r
= cgroup_bonding_install_list(cgroup_bondings
, pid
)) < 0) {
1053 log_debug("Forked %s as %llu", command
->path
, (unsigned long long) pid
);
1055 command
->exec_status
.pid
= pid
;
1056 command
->exec_status
.start_timestamp
= now(CLOCK_REALTIME
);
1062 void exec_context_init(ExecContext
*c
) {
1067 c
->oom_adjust_set
= false;
1069 c
->nice_set
= false;
1070 c
->ioprio
= IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE
, 0);
1071 c
->ioprio_set
= false;
1072 c
->cpu_sched_policy
= SCHED_OTHER
;
1073 c
->cpu_sched_priority
= 0;
1074 c
->cpu_sched_set
= false;
1075 CPU_ZERO(&c
->cpu_affinity
);
1076 c
->cpu_affinity_set
= false;
1077 c
->timer_slack_ns
= 0;
1078 c
->timer_slack_ns_set
= false;
1080 c
->cpu_sched_reset_on_fork
= false;
1081 c
->non_blocking
= false;
1086 c
->syslog_priority
= LOG_DAEMON
|LOG_INFO
;
1089 c
->capability_bounding_set_drop
= 0;
1092 void exec_context_done(ExecContext
*c
) {
1097 strv_free(c
->environment
);
1098 c
->environment
= NULL
;
1100 for (l
= 0; l
< ELEMENTSOF(c
->rlimit
); l
++) {
1102 c
->rlimit
[l
] = NULL
;
1105 free(c
->working_directory
);
1106 c
->working_directory
= NULL
;
1107 free(c
->root_directory
);
1108 c
->root_directory
= NULL
;
1113 free(c
->syslog_identifier
);
1114 c
->syslog_identifier
= NULL
;
1122 strv_free(c
->supplementary_groups
);
1123 c
->supplementary_groups
= NULL
;
1125 if (c
->capabilities
) {
1126 cap_free(c
->capabilities
);
1127 c
->capabilities
= NULL
;
1131 void exec_command_done(ExecCommand
*c
) {
1141 void exec_command_done_array(ExecCommand
*c
, unsigned n
) {
1144 for (i
= 0; i
< n
; i
++)
1145 exec_command_done(c
+i
);
1148 void exec_command_free_list(ExecCommand
*c
) {
1152 LIST_REMOVE(ExecCommand
, command
, c
, i
);
1153 exec_command_done(i
);
1158 void exec_command_free_array(ExecCommand
**c
, unsigned n
) {
1161 for (i
= 0; i
< n
; i
++) {
1162 exec_command_free_list(c
[i
]);
1167 void exec_context_dump(ExecContext
*c
, FILE* f
, const char *prefix
) {
1179 "%sWorkingDirectory: %s\n"
1180 "%sRootDirectory: %s\n"
1181 "%sNonBlocking: %s\n",
1183 prefix
, c
->working_directory
? c
->working_directory
: "/",
1184 prefix
, c
->root_directory
? c
->root_directory
: "/",
1185 prefix
, yes_no(c
->non_blocking
));
1188 for (e
= c
->environment
; *e
; e
++)
1189 fprintf(f
, "%sEnvironment: %s\n", prefix
, *e
);
1196 if (c
->oom_adjust_set
)
1198 "%sOOMAdjust: %i\n",
1199 prefix
, c
->oom_adjust
);
1201 for (i
= 0; i
< RLIM_NLIMITS
; i
++)
1203 fprintf(f
, "%s%s: %llu\n", prefix
, rlimit_to_string(i
), (unsigned long long) c
->rlimit
[i
]->rlim_max
);
1207 "%sIOSchedulingClass: %s\n"
1208 "%sIOPriority: %i\n",
1209 prefix
, ioprio_class_to_string(IOPRIO_PRIO_CLASS(c
->ioprio
)),
1210 prefix
, (int) IOPRIO_PRIO_DATA(c
->ioprio
));
1212 if (c
->cpu_sched_set
)
1214 "%sCPUSchedulingPolicy: %s\n"
1215 "%sCPUSchedulingPriority: %i\n"
1216 "%sCPUSchedulingResetOnFork: %s\n",
1217 prefix
, sched_policy_to_string(c
->cpu_sched_policy
),
1218 prefix
, c
->cpu_sched_priority
,
1219 prefix
, yes_no(c
->cpu_sched_reset_on_fork
));
1221 if (c
->cpu_affinity_set
) {
1222 fprintf(f
, "%sCPUAffinity:", prefix
);
1223 for (i
= 0; i
< CPU_SETSIZE
; i
++)
1224 if (CPU_ISSET(i
, &c
->cpu_affinity
))
1225 fprintf(f
, " %i", i
);
1229 if (c
->timer_slack_ns_set
)
1230 fprintf(f
, "%sTimerSlackNS: %lu\n", prefix
, c
->timer_slack_ns
);
1233 "%sStandardInput: %s\n"
1234 "%sStandardOutput: %s\n"
1235 "%sStandardError: %s\n",
1236 prefix
, exec_input_to_string(c
->std_input
),
1237 prefix
, exec_output_to_string(c
->std_output
),
1238 prefix
, exec_output_to_string(c
->std_error
));
1243 prefix
, c
->tty_path
);
1245 if (c
->std_output
== EXEC_OUTPUT_SYSLOG
|| c
->std_output
== EXEC_OUTPUT_KERNEL
||
1246 c
->std_error
== EXEC_OUTPUT_SYSLOG
|| c
->std_error
== EXEC_OUTPUT_KERNEL
)
1248 "%sSyslogFacility: %s\n"
1249 "%sSyslogLevel: %s\n",
1250 prefix
, log_facility_to_string(LOG_FAC(c
->syslog_priority
)),
1251 prefix
, log_level_to_string(LOG_PRI(c
->syslog_priority
)));
1253 if (c
->capabilities
) {
1255 if ((t
= cap_to_text(c
->capabilities
, NULL
))) {
1256 fprintf(f
, "%sCapabilities: %s\n",
1263 fprintf(f
, "%sSecure Bits:%s%s%s%s%s%s\n",
1265 (c
->secure_bits
& SECURE_KEEP_CAPS
) ? " keep-caps" : "",
1266 (c
->secure_bits
& SECURE_KEEP_CAPS_LOCKED
) ? " keep-caps-locked" : "",
1267 (c
->secure_bits
& SECURE_NO_SETUID_FIXUP
) ? " no-setuid-fixup" : "",
1268 (c
->secure_bits
& SECURE_NO_SETUID_FIXUP_LOCKED
) ? " no-setuid-fixup-locked" : "",
1269 (c
->secure_bits
& SECURE_NOROOT
) ? " noroot" : "",
1270 (c
->secure_bits
& SECURE_NOROOT_LOCKED
) ? "noroot-locked" : "");
1272 if (c
->capability_bounding_set_drop
) {
1273 fprintf(f
, "%sCapabilityBoundingSetDrop:", prefix
);
1275 for (i
= 0; i
<= CAP_LAST_CAP
; i
++)
1276 if (c
->capability_bounding_set_drop
& (1 << i
)) {
1279 if ((t
= cap_to_name(i
))) {
1280 fprintf(f
, " %s", t
);
1289 fprintf(f
, "%sUser: %s", prefix
, c
->user
);
1291 fprintf(f
, "%sGroup: %s", prefix
, c
->group
);
1293 if (c
->supplementary_groups
) {
1296 fprintf(f
, "%sSupplementaryGroups:", prefix
);
1298 STRV_FOREACH(g
, c
->supplementary_groups
)
1299 fprintf(f
, " %s", *g
);
1305 void exec_status_fill(ExecStatus
*s
, pid_t pid
, int code
, int status
) {
1309 s
->exit_timestamp
= now(CLOCK_REALTIME
);
1315 void exec_status_dump(ExecStatus
*s
, FILE *f
, const char *prefix
) {
1316 char buf
[FORMAT_TIMESTAMP_MAX
];
1329 prefix
, (unsigned long long) s
->pid
);
1331 if (s
->start_timestamp
> 0)
1333 "%sStart Timestamp: %s\n",
1334 prefix
, format_timestamp(buf
, sizeof(buf
), s
->start_timestamp
));
1336 if (s
->exit_timestamp
> 0)
1338 "%sExit Timestamp: %s\n"
1340 "%sExit Status: %i\n",
1341 prefix
, format_timestamp(buf
, sizeof(buf
), s
->exit_timestamp
),
1342 prefix
, sigchld_code_to_string(s
->code
),
1346 char *exec_command_line(char **argv
) {
1354 STRV_FOREACH(a
, argv
)
1357 if (!(n
= new(char, k
)))
1361 STRV_FOREACH(a
, argv
) {
1368 if (strpbrk(*a
, WHITESPACE
)) {
1379 /* FIXME: this doesn't really handle arguments that have
1380 * spaces and ticks in them */
1385 void exec_command_dump(ExecCommand
*c
, FILE *f
, const char *prefix
) {
1387 const char *prefix2
;
1396 p2
= strappend(prefix
, "\t");
1397 prefix2
= p2
? p2
: prefix
;
1399 cmd
= exec_command_line(c
->argv
);
1402 "%sCommand Line: %s\n",
1403 prefix
, cmd
? cmd
: strerror(ENOMEM
));
1407 exec_status_dump(&c
->exec_status
, f
, prefix2
);
1412 void exec_command_dump_list(ExecCommand
*c
, FILE *f
, const char *prefix
) {
1418 LIST_FOREACH(command
, c
, c
)
1419 exec_command_dump(c
, f
, prefix
);
1422 void exec_command_append_list(ExecCommand
**l
, ExecCommand
*e
) {
1429 /* It's kinda important that we keep the order here */
1430 LIST_FIND_TAIL(ExecCommand
, command
, *l
, end
);
1431 LIST_INSERT_AFTER(ExecCommand
, command
, *l
, end
, e
);
1436 int exec_command_set(ExecCommand
*c
, const char *path
, ...) {
1444 l
= strv_new_ap(path
, ap
);
1450 if (!(p
= strdup(path
))) {
1464 const char* exit_status_to_string(ExitStatus status
) {
1466 /* We cast to int here, so that -Wenum doesn't complain that
1467 * EXIT_SUCCESS/EXIT_FAILURE aren't in the enum */
1469 switch ((int) status
) {
1477 case EXIT_INVALIDARGUMENT
:
1478 return "INVALIDARGUMENT";
1480 case EXIT_NOTIMPLEMENTED
:
1481 return "NOTIMPLEMENTED";
1483 case EXIT_NOPERMISSION
:
1484 return "NOPERMISSION";
1486 case EXIT_NOTINSTALLED
:
1487 return "NOTINSSTALLED";
1489 case EXIT_NOTCONFIGURED
:
1490 return "NOTCONFIGURED";
1492 case EXIT_NOTRUNNING
:
1493 return "NOTRUNNING";
1513 case EXIT_OOM_ADJUST
:
1514 return "OOM_ADJUST";
1516 case EXIT_SIGNAL_MASK
:
1517 return "SIGNAL_MASK";
1531 case EXIT_TIMERSLACK
:
1532 return "TIMERSLACK";
1534 case EXIT_SECUREBITS
:
1535 return "SECUREBITS";
1537 case EXIT_SETSCHEDULER
:
1538 return "SETSCHEDULER";
1540 case EXIT_CPUAFFINITY
:
1541 return "CPUAFFINITY";
1549 case EXIT_CAPABILITIES
:
1550 return "CAPABILITIES";
1569 static const char* const exec_input_table
[_EXEC_INPUT_MAX
] = {
1570 [EXEC_INPUT_NULL
] = "null",
1571 [EXEC_INPUT_TTY
] = "tty",
1572 [EXEC_INPUT_TTY_FORCE
] = "tty-force",
1573 [EXEC_INPUT_TTY_FAIL
] = "tty-fail",
1574 [EXEC_INPUT_SOCKET
] = "socket"
1577 static const char* const exec_output_table
[_EXEC_OUTPUT_MAX
] = {
1578 [EXEC_OUTPUT_INHERIT
] = "inherit",
1579 [EXEC_OUTPUT_NULL
] = "null",
1580 [EXEC_OUTPUT_TTY
] = "tty",
1581 [EXEC_OUTPUT_SYSLOG
] = "syslog",
1582 [EXEC_OUTPUT_KERNEL
] = "kernel",
1583 [EXEC_OUTPUT_SOCKET
] = "socket"
1586 DEFINE_STRING_TABLE_LOOKUP(exec_output
, ExecOutput
);
1588 DEFINE_STRING_TABLE_LOOKUP(exec_input
, ExecInput
);