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 setup_input(const ExecContext
*context
) {
228 switch (context
->std_input
) {
230 case EXEC_INPUT_NULL
:
231 return open_null_as(O_RDONLY
, STDIN_FILENO
);
234 case EXEC_INPUT_TTY_FORCE
:
235 case EXEC_INPUT_TTY_FAIL
: {
238 if ((fd
= acquire_terminal(
240 context
->std_input
== EXEC_INPUT_TTY_FAIL
,
241 context
->std_input
== EXEC_INPUT_TTY_FORCE
)) < 0)
244 if (fd
!= STDIN_FILENO
) {
245 r
= dup2(fd
, STDIN_FILENO
) < 0 ? -errno
: STDIN_FILENO
;
246 close_nointr_nofail(fd
);
254 assert_not_reached("Unknown input type");
258 static int setup_output(const ExecContext
*context
, const char *ident
) {
262 /* This expects the input is already set up */
264 switch (context
->std_output
) {
266 case EXEC_OUTPUT_INHERIT
:
268 /* If the input is connected to a terminal, inherit that... */
269 if (is_terminal_input(context
->std_input
))
270 return dup2(STDIN_FILENO
, STDOUT_FILENO
) < 0 ? -errno
: STDOUT_FILENO
;
274 case EXEC_OUTPUT_NULL
:
275 return open_null_as(O_WRONLY
, STDOUT_FILENO
);
277 case EXEC_OUTPUT_TTY
: {
278 if (is_terminal_input(context
->std_input
))
279 return dup2(STDIN_FILENO
, STDOUT_FILENO
) < 0 ? -errno
: STDOUT_FILENO
;
281 /* We don't reset the terminal if this is just about output */
282 return open_terminal_as(tty_path(context
), O_WRONLY
, STDOUT_FILENO
);
285 case EXEC_OUTPUT_SYSLOG
:
286 case EXEC_OUTPUT_KERNEL
:
287 return connect_logger_as(context
, context
->std_output
, ident
, STDOUT_FILENO
);
290 assert_not_reached("Unknown output type");
294 static int setup_error(const ExecContext
*context
, const char *ident
) {
298 /* This expects the input and output are already set up */
300 /* Don't change the stderr file descriptor if we inherit all
301 * the way and are not on a tty */
302 if (context
->std_error
== EXEC_OUTPUT_INHERIT
&&
303 context
->std_output
== EXEC_OUTPUT_INHERIT
&&
304 !is_terminal_input(context
->std_input
))
305 return STDERR_FILENO
;
307 /* Duplicate form stdout if possible */
308 if (context
->std_error
== context
->std_output
||
309 context
->std_error
== EXEC_OUTPUT_INHERIT
)
310 return dup2(STDOUT_FILENO
, STDERR_FILENO
) < 0 ? -errno
: STDERR_FILENO
;
312 switch (context
->std_error
) {
314 case EXEC_OUTPUT_NULL
:
315 return open_null_as(O_WRONLY
, STDERR_FILENO
);
317 case EXEC_OUTPUT_TTY
:
318 if (is_terminal_input(context
->std_input
))
319 return dup2(STDIN_FILENO
, STDERR_FILENO
) < 0 ? -errno
: STDERR_FILENO
;
321 /* We don't reset the terminal if this is just about output */
322 return open_terminal_as(tty_path(context
), O_WRONLY
, STDERR_FILENO
);
324 case EXEC_OUTPUT_SYSLOG
:
325 case EXEC_OUTPUT_KERNEL
:
326 return connect_logger_as(context
, context
->std_error
, ident
, STDERR_FILENO
);
329 assert_not_reached("Unknown error type");
333 static int chown_terminal(int fd
, uid_t uid
) {
338 /* This might fail. What matters are the results. */
340 fchmod(fd
, TTY_MODE
);
342 if (fstat(fd
, &st
) < 0)
345 if (st
.st_uid
!= uid
|| (st
.st_mode
& 0777) != TTY_MODE
)
351 static int setup_confirm_stdio(const ExecContext
*context
,
353 int *_saved_stdout
) {
354 int fd
= -1, saved_stdin
, saved_stdout
= -1, r
;
357 assert(_saved_stdin
);
358 assert(_saved_stdout
);
360 /* This returns positive EXIT_xxx return values instead of
361 * negative errno style values! */
363 if ((saved_stdin
= fcntl(STDIN_FILENO
, F_DUPFD
, 3)) < 0)
366 if ((saved_stdout
= fcntl(STDOUT_FILENO
, F_DUPFD
, 3)) < 0) {
371 if ((fd
= acquire_terminal(
373 context
->std_input
== EXEC_INPUT_TTY_FAIL
,
374 context
->std_input
== EXEC_INPUT_TTY_FORCE
)) < 0) {
379 if (chown_terminal(fd
, getuid()) < 0) {
384 if (dup2(fd
, STDIN_FILENO
) < 0) {
389 if (dup2(fd
, STDOUT_FILENO
) < 0) {
395 close_nointr_nofail(fd
);
397 *_saved_stdin
= saved_stdin
;
398 *_saved_stdout
= saved_stdout
;
403 if (saved_stdout
>= 0)
404 close_nointr_nofail(saved_stdout
);
406 if (saved_stdin
>= 0)
407 close_nointr_nofail(saved_stdin
);
410 close_nointr_nofail(fd
);
415 static int restore_conform_stdio(const ExecContext
*context
,
423 assert(*saved_stdin
>= 0);
424 assert(saved_stdout
);
425 assert(*saved_stdout
>= 0);
427 /* This returns positive EXIT_xxx return values instead of
428 * negative errno style values! */
430 if (is_terminal_input(context
->std_input
)) {
432 /* The service wants terminal input. */
436 context
->std_output
== EXEC_OUTPUT_INHERIT
||
437 context
->std_output
== EXEC_OUTPUT_TTY
;
440 /* If the service doesn't want a controlling terminal,
441 * then we need to get rid entirely of what we have
444 if (release_terminal() < 0)
447 if (dup2(*saved_stdin
, STDIN_FILENO
) < 0)
450 if (dup2(*saved_stdout
, STDOUT_FILENO
) < 0)
453 *keep_stdout
= *keep_stdin
= false;
459 static int get_group_creds(const char *groupname
, gid_t
*gid
) {
466 /* We enforce some special rules for gid=0: in order to avoid
467 * NSS lookups for root we hardcode its data. */
469 if (streq(groupname
, "root") || streq(groupname
, "0")) {
474 if (safe_atolu(groupname
, &lu
) >= 0) {
476 g
= getgrgid((gid_t
) lu
);
479 g
= getgrnam(groupname
);
483 return errno
!= 0 ? -errno
: -ESRCH
;
489 static int get_user_creds(const char **username
, uid_t
*uid
, gid_t
*gid
, const char **home
) {
499 /* We enforce some special rules for uid=0: in order to avoid
500 * NSS lookups for root we hardcode its data. */
502 if (streq(*username
, "root") || streq(*username
, "0")) {
510 if (safe_atolu(*username
, &lu
) >= 0) {
512 p
= getpwuid((uid_t
) lu
);
514 /* If there are multiple users with the same id, make
515 * sure to leave $USER to the configured value instead
516 * of the first occurence in the database. However if
517 * the uid was configured by a numeric uid, then let's
518 * pick the real username from /etc/passwd. */
520 *username
= p
->pw_name
;
523 p
= getpwnam(*username
);
527 return errno
!= 0 ? -errno
: -ESRCH
;
535 static int enforce_groups(const ExecContext
*context
, const char *username
, gid_t gid
) {
536 bool keep_groups
= false;
541 /* Lookup and ser GID and supplementary group list. Here too
542 * we avoid NSS lookups for gid=0. */
544 if (context
->group
|| username
) {
547 if ((r
= get_group_creds(context
->group
, &gid
)) < 0)
550 /* First step, initialize groups from /etc/groups */
551 if (username
&& gid
!= 0) {
552 if (initgroups(username
, gid
) < 0)
558 /* Second step, set our gids */
559 if (setresgid(gid
, gid
, gid
) < 0)
563 if (context
->supplementary_groups
) {
568 /* Final step, initialize any manually set supplementary groups */
569 ngroups_max
= (int) sysconf(_SC_NGROUPS_MAX
);
571 if (!(gids
= new(gid_t
, ngroups_max
)))
575 if ((k
= getgroups(ngroups_max
, gids
)) < 0) {
582 STRV_FOREACH(i
, context
->supplementary_groups
) {
584 if (k
>= ngroups_max
) {
589 if ((r
= get_group_creds(*i
, gids
+k
)) < 0) {
597 if (setgroups(k
, gids
) < 0) {
608 static int enforce_user(const ExecContext
*context
, uid_t uid
) {
612 /* Sets (but doesn't lookup) the uid and make sure we keep the
613 * capabilities while doing so. */
615 if (context
->capabilities
) {
617 static const cap_value_t bits
[] = {
618 CAP_SETUID
, /* Necessary so that we can run setresuid() below */
619 CAP_SETPCAP
/* Necessary so that we can set PR_SET_SECUREBITS later on */
622 /* First step: If we need to keep capabilities but
623 * drop privileges we need to make sure we keep our
624 * caps, whiel we drop priviliges. */
626 int sb
= context
->secure_bits
|SECURE_KEEP_CAPS
;
628 if (prctl(PR_GET_SECUREBITS
) != sb
)
629 if (prctl(PR_SET_SECUREBITS
, sb
) < 0)
633 /* Second step: set the capabilites. This will reduce
634 * the capabilities to the minimum we need. */
636 if (!(d
= cap_dup(context
->capabilities
)))
639 if (cap_set_flag(d
, CAP_EFFECTIVE
, ELEMENTSOF(bits
), bits
, CAP_SET
) < 0 ||
640 cap_set_flag(d
, CAP_PERMITTED
, ELEMENTSOF(bits
), bits
, CAP_SET
) < 0) {
646 if (cap_set_proc(d
) < 0) {
655 /* Third step: actually set the uids */
656 if (setresuid(uid
, uid
, uid
) < 0)
659 /* At this point we should have all necessary capabilities but
660 are otherwise a normal user. However, the caps might got
661 corrupted due to the setresuid() so we need clean them up
662 later. This is done outside of this call. */
667 int exec_spawn(ExecCommand
*command
,
668 const ExecContext
*context
,
669 int fds
[], unsigned n_fds
,
670 bool apply_permissions
,
673 CGroupBonding
*cgroup_bondings
,
683 assert(fds
|| n_fds
<= 0);
685 if (!(line
= exec_command_line(command
)))
688 log_debug("About to execute: %s", line
);
692 if ((r
= cgroup_bonding_realize_list(cgroup_bondings
)))
695 if ((pid
= fork()) < 0)
701 const char *username
= NULL
, *home
= NULL
;
702 uid_t uid
= (uid_t
) -1;
703 gid_t gid
= (gid_t
) -1;
704 char **our_env
= NULL
, **final_env
= NULL
;
706 int saved_stdout
= -1, saved_stdin
= -1;
707 bool keep_stdout
= false, keep_stdin
= false;
711 reset_all_signal_handlers();
713 if (sigemptyset(&ss
) < 0 ||
714 sigprocmask(SIG_SETMASK
, &ss
, NULL
) < 0) {
715 r
= EXIT_SIGNAL_MASK
;
724 umask(context
->umask
);
729 /* Set up terminal for the question */
730 if ((r
= setup_confirm_stdio(context
,
731 &saved_stdin
, &saved_stdout
)))
734 /* Now ask the question. */
735 if (!(line
= exec_command_line(command
))) {
740 r
= ask(&response
, "yns", "Execute %s? [Yes, No, Skip] ", line
);
743 if (r
< 0 || response
== 'n') {
746 } else if (response
== 's') {
751 /* Release terminal for the question */
752 if ((r
= restore_conform_stdio(context
,
753 &saved_stdin
, &saved_stdout
,
754 &keep_stdin
, &keep_stdout
)))
759 if (setup_input(context
) < 0) {
765 if (setup_output(context
, file_name_from_path(command
->path
)) < 0) {
770 if (setup_error(context
, file_name_from_path(command
->path
)) < 0) {
776 if ((r
= cgroup_bonding_install_list(cgroup_bondings
, 0)) < 0) {
781 if (context
->oom_adjust_set
) {
784 snprintf(t
, sizeof(t
), "%i", context
->oom_adjust
);
787 if (write_one_line_file("/proc/self/oom_adj", t
) < 0) {
793 if (context
->nice_set
)
794 if (setpriority(PRIO_PROCESS
, 0, context
->nice
) < 0) {
799 if (context
->cpu_sched_set
) {
800 struct sched_param param
;
803 param
.sched_priority
= context
->cpu_sched_priority
;
805 if (sched_setscheduler(0, context
->cpu_sched_policy
|
806 (context
->cpu_sched_reset_on_fork
? SCHED_RESET_ON_FORK
: 0), ¶m
) < 0) {
807 r
= EXIT_SETSCHEDULER
;
812 if (context
->cpu_affinity_set
)
813 if (sched_setaffinity(0, sizeof(context
->cpu_affinity
), &context
->cpu_affinity
) < 0) {
814 r
= EXIT_CPUAFFINITY
;
818 if (context
->ioprio_set
)
819 if (ioprio_set(IOPRIO_WHO_PROCESS
, 0, context
->ioprio
) < 0) {
824 if (context
->timer_slack_ns_set
)
825 if (prctl(PR_SET_TIMERSLACK
, context
->timer_slack_ns_set
) < 0) {
831 username
= context
->user
;
832 if (get_user_creds(&username
, &uid
, &gid
, &home
) < 0) {
837 if (is_terminal_input(context
->std_input
))
838 if (chown_terminal(STDIN_FILENO
, uid
) < 0) {
844 if (apply_permissions
)
845 if (enforce_groups(context
, username
, uid
) < 0) {
851 if (context
->root_directory
)
852 if (chroot(context
->root_directory
) < 0) {
857 if (chdir(context
->working_directory
? context
->working_directory
: "/") < 0) {
865 if (asprintf(&d
, "%s/%s",
866 context
->root_directory
? context
->root_directory
: "",
867 context
->working_directory
? context
->working_directory
: "") < 0) {
881 if (close_all_fds(fds
, n_fds
) < 0 ||
882 shift_fds(fds
, n_fds
) < 0 ||
883 flags_fds(fds
, n_fds
, context
->non_blocking
) < 0) {
888 if (apply_permissions
) {
890 for (i
= 0; i
< RLIMIT_NLIMITS
; i
++) {
891 if (!context
->rlimit
[i
])
894 if (setrlimit(i
, context
->rlimit
[i
]) < 0) {
901 if (enforce_user(context
, uid
) < 0) {
906 /* PR_GET_SECUREBITS is not priviliged, while
907 * PR_SET_SECUREBITS is. So to suppress
908 * potential EPERMs we'll try not to call
909 * PR_SET_SECUREBITS unless necessary. */
910 if (prctl(PR_GET_SECUREBITS
) != context
->secure_bits
)
911 if (prctl(PR_SET_SECUREBITS
, context
->secure_bits
) < 0) {
916 if (context
->capabilities
)
917 if (cap_set_proc(context
->capabilities
) < 0) {
918 r
= EXIT_CAPABILITIES
;
923 if (!(our_env
= new0(char*, 6))) {
929 if (asprintf(our_env
+ n_env
++, "LISTEN_PID=%llu", (unsigned long long) getpid()) < 0 ||
930 asprintf(our_env
+ n_env
++, "LISTEN_FDS=%u", n_fds
) < 0) {
936 if (asprintf(our_env
+ n_env
++, "HOME=%s", home
) < 0) {
942 if (asprintf(our_env
+ n_env
++, "LOGNAME=%s", username
) < 0 ||
943 asprintf(our_env
+ n_env
++, "USER=%s", username
) < 0) {
948 if (!(final_env
= strv_env_merge(environ
, our_env
, context
->environment
, NULL
))) {
953 execve(command
->path
, command
->argv
, final_env
);
958 strv_free(final_env
);
960 if (saved_stdin
>= 0)
961 close_nointr_nofail(saved_stdin
);
963 if (saved_stdout
>= 0)
964 close_nointr_nofail(saved_stdout
);
969 /* We add the new process to the cgroup both in the child (so
970 * that we can be sure that no user code is ever executed
971 * outside of the cgroup) and in the parent (so that we can be
972 * sure that when we kill the cgroup the process will be
975 if ((r
= cgroup_bonding_install_list(cgroup_bondings
, pid
)) < 0) {
980 log_debug("Forked %s as %llu", command
->path
, (unsigned long long) pid
);
982 command
->exec_status
.pid
= pid
;
983 command
->exec_status
.start_timestamp
= now(CLOCK_REALTIME
);
989 void exec_context_init(ExecContext
*c
) {
994 c
->oom_adjust_set
= false;
997 c
->ioprio
= IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE
, 0);
998 c
->ioprio_set
= false;
999 c
->cpu_sched_policy
= SCHED_OTHER
;
1000 c
->cpu_sched_priority
= 0;
1001 c
->cpu_sched_set
= false;
1002 CPU_ZERO(&c
->cpu_affinity
);
1003 c
->cpu_affinity_set
= false;
1004 c
->timer_slack_ns
= 0;
1005 c
->timer_slack_ns_set
= false;
1007 c
->cpu_sched_reset_on_fork
= false;
1008 c
->non_blocking
= false;
1013 c
->syslog_priority
= LOG_DAEMON
|LOG_INFO
;
1016 c
->capability_bounding_set_drop
= 0;
1019 void exec_context_done(ExecContext
*c
) {
1024 strv_free(c
->environment
);
1025 c
->environment
= NULL
;
1027 for (l
= 0; l
< ELEMENTSOF(c
->rlimit
); l
++) {
1029 c
->rlimit
[l
] = NULL
;
1032 free(c
->working_directory
);
1033 c
->working_directory
= NULL
;
1034 free(c
->root_directory
);
1035 c
->root_directory
= NULL
;
1040 free(c
->syslog_identifier
);
1041 c
->syslog_identifier
= NULL
;
1049 strv_free(c
->supplementary_groups
);
1050 c
->supplementary_groups
= NULL
;
1052 if (c
->capabilities
) {
1053 cap_free(c
->capabilities
);
1054 c
->capabilities
= NULL
;
1058 void exec_command_done(ExecCommand
*c
) {
1068 void exec_command_done_array(ExecCommand
*c
, unsigned n
) {
1071 for (i
= 0; i
< n
; i
++)
1072 exec_command_done(c
+i
);
1075 void exec_command_free_list(ExecCommand
*c
) {
1079 LIST_REMOVE(ExecCommand
, command
, c
, i
);
1080 exec_command_done(i
);
1085 void exec_command_free_array(ExecCommand
**c
, unsigned n
) {
1088 for (i
= 0; i
< n
; i
++) {
1089 exec_command_free_list(c
[i
]);
1094 void exec_context_dump(ExecContext
*c
, FILE* f
, const char *prefix
) {
1106 "%sWorkingDirectory: %s\n"
1107 "%sRootDirectory: %s\n"
1108 "%sNonBlocking: %s\n",
1110 prefix
, c
->working_directory
? c
->working_directory
: "/",
1111 prefix
, c
->root_directory
? c
->root_directory
: "/",
1112 prefix
, yes_no(c
->non_blocking
));
1115 for (e
= c
->environment
; *e
; e
++)
1116 fprintf(f
, "%sEnvironment: %s\n", prefix
, *e
);
1123 if (c
->oom_adjust_set
)
1125 "%sOOMAdjust: %i\n",
1126 prefix
, c
->oom_adjust
);
1128 for (i
= 0; i
< RLIM_NLIMITS
; i
++)
1130 fprintf(f
, "%s%s: %llu\n", prefix
, rlimit_to_string(i
), (unsigned long long) c
->rlimit
[i
]->rlim_max
);
1134 "%sIOSchedulingClass: %s\n"
1135 "%sIOPriority: %i\n",
1136 prefix
, ioprio_class_to_string(IOPRIO_PRIO_CLASS(c
->ioprio
)),
1137 prefix
, (int) IOPRIO_PRIO_DATA(c
->ioprio
));
1139 if (c
->cpu_sched_set
)
1141 "%sCPUSchedulingPolicy: %s\n"
1142 "%sCPUSchedulingPriority: %i\n"
1143 "%sCPUSchedulingResetOnFork: %s\n",
1144 prefix
, sched_policy_to_string(c
->cpu_sched_policy
),
1145 prefix
, c
->cpu_sched_priority
,
1146 prefix
, yes_no(c
->cpu_sched_reset_on_fork
));
1148 if (c
->cpu_affinity_set
) {
1149 fprintf(f
, "%sCPUAffinity:", prefix
);
1150 for (i
= 0; i
< CPU_SETSIZE
; i
++)
1151 if (CPU_ISSET(i
, &c
->cpu_affinity
))
1152 fprintf(f
, " %i", i
);
1156 if (c
->timer_slack_ns_set
)
1157 fprintf(f
, "%sTimerSlackNS: %lu\n", prefix
, c
->timer_slack_ns
);
1160 "%sStandardInput: %s\n"
1161 "%sStandardOutput: %s\n"
1162 "%sStandardError: %s\n",
1163 prefix
, exec_input_to_string(c
->std_input
),
1164 prefix
, exec_output_to_string(c
->std_output
),
1165 prefix
, exec_output_to_string(c
->std_error
));
1170 prefix
, c
->tty_path
);
1172 if (c
->std_output
== EXEC_OUTPUT_SYSLOG
|| c
->std_output
== EXEC_OUTPUT_KERNEL
||
1173 c
->std_error
== EXEC_OUTPUT_SYSLOG
|| c
->std_error
== EXEC_OUTPUT_KERNEL
)
1175 "%sSyslogFacility: %s\n"
1176 "%sSyslogLevel: %s\n",
1177 prefix
, log_facility_to_string(LOG_FAC(c
->syslog_priority
)),
1178 prefix
, log_level_to_string(LOG_PRI(c
->syslog_priority
)));
1180 if (c
->capabilities
) {
1182 if ((t
= cap_to_text(c
->capabilities
, NULL
))) {
1183 fprintf(f
, "%sCapabilities: %s\n",
1190 fprintf(f
, "%sSecure Bits:%s%s%s%s%s%s\n",
1192 (c
->secure_bits
& SECURE_KEEP_CAPS
) ? " keep-caps" : "",
1193 (c
->secure_bits
& SECURE_KEEP_CAPS_LOCKED
) ? " keep-caps-locked" : "",
1194 (c
->secure_bits
& SECURE_NO_SETUID_FIXUP
) ? " no-setuid-fixup" : "",
1195 (c
->secure_bits
& SECURE_NO_SETUID_FIXUP_LOCKED
) ? " no-setuid-fixup-locked" : "",
1196 (c
->secure_bits
& SECURE_NOROOT
) ? " noroot" : "",
1197 (c
->secure_bits
& SECURE_NOROOT_LOCKED
) ? "noroot-locked" : "");
1199 if (c
->capability_bounding_set_drop
) {
1200 fprintf(f
, "%sCapabilityBoundingSetDrop:", prefix
);
1202 for (i
= 0; i
<= CAP_LAST_CAP
; i
++)
1203 if (c
->capability_bounding_set_drop
& (1 << i
)) {
1206 if ((t
= cap_to_name(i
))) {
1207 fprintf(f
, " %s", t
);
1216 fprintf(f
, "%sUser: %s", prefix
, c
->user
);
1218 fprintf(f
, "%sGroup: %s", prefix
, c
->group
);
1220 if (c
->supplementary_groups
) {
1223 fprintf(f
, "%sSupplementaryGroups:", prefix
);
1225 STRV_FOREACH(g
, c
->supplementary_groups
)
1226 fprintf(f
, " %s", *g
);
1232 void exec_status_fill(ExecStatus
*s
, pid_t pid
, int code
, int status
) {
1236 s
->exit_timestamp
= now(CLOCK_REALTIME
);
1242 void exec_status_dump(ExecStatus
*s
, FILE *f
, const char *prefix
) {
1243 char buf
[FORMAT_TIMESTAMP_MAX
];
1256 prefix
, (unsigned long long) s
->pid
);
1258 if (s
->start_timestamp
> 0)
1260 "%sStart Timestamp: %s\n",
1261 prefix
, format_timestamp(buf
, sizeof(buf
), s
->start_timestamp
));
1263 if (s
->exit_timestamp
> 0)
1265 "%sExit Timestamp: %s\n"
1267 "%sExit Status: %i\n",
1268 prefix
, format_timestamp(buf
, sizeof(buf
), s
->exit_timestamp
),
1269 prefix
, sigchld_code_to_string(s
->code
),
1273 char *exec_command_line(ExecCommand
*c
) {
1282 STRV_FOREACH(a
, c
->argv
)
1285 if (!(n
= new(char, k
)))
1289 STRV_FOREACH(a
, c
->argv
) {
1296 if (strpbrk(*a
, WHITESPACE
)) {
1307 /* FIXME: this doesn't really handle arguments that have
1308 * spaces and ticks in them */
1313 void exec_command_dump(ExecCommand
*c
, FILE *f
, const char *prefix
) {
1315 const char *prefix2
;
1324 p2
= strappend(prefix
, "\t");
1325 prefix2
= p2
? p2
: prefix
;
1327 cmd
= exec_command_line(c
);
1330 "%sCommand Line: %s\n",
1331 prefix
, cmd
? cmd
: strerror(ENOMEM
));
1335 exec_status_dump(&c
->exec_status
, f
, prefix2
);
1340 void exec_command_dump_list(ExecCommand
*c
, FILE *f
, const char *prefix
) {
1346 LIST_FOREACH(command
, c
, c
)
1347 exec_command_dump(c
, f
, prefix
);
1350 void exec_command_append_list(ExecCommand
**l
, ExecCommand
*e
) {
1357 /* It's kinda important that we keep the order here */
1358 LIST_FIND_TAIL(ExecCommand
, command
, *l
, end
);
1359 LIST_INSERT_AFTER(ExecCommand
, command
, *l
, end
, e
);
1364 int exec_command_set(ExecCommand
*c
, const char *path
, ...) {
1372 l
= strv_new_ap(path
, ap
);
1378 if (!(p
= strdup(path
))) {
1392 const char* exit_status_to_string(ExitStatus status
) {
1394 /* We cast to int here, so that -Wenum doesn't complain that
1395 * EXIT_SUCCESS/EXIT_FAILURE aren't in the enum */
1397 switch ((int) status
) {
1405 case EXIT_INVALIDARGUMENT
:
1406 return "INVALIDARGUMENT";
1408 case EXIT_NOTIMPLEMENTED
:
1409 return "NOTIMPLEMENTED";
1411 case EXIT_NOPERMISSION
:
1412 return "NOPERMISSION";
1414 case EXIT_NOTINSTALLED
:
1415 return "NOTINSSTALLED";
1417 case EXIT_NOTCONFIGURED
:
1418 return "NOTCONFIGURED";
1420 case EXIT_NOTRUNNING
:
1421 return "NOTRUNNING";
1441 case EXIT_OOM_ADJUST
:
1442 return "OOM_ADJUST";
1444 case EXIT_SIGNAL_MASK
:
1445 return "SIGNAL_MASK";
1459 case EXIT_TIMERSLACK
:
1460 return "TIMERSLACK";
1462 case EXIT_SECUREBITS
:
1463 return "SECUREBITS";
1465 case EXIT_SETSCHEDULER
:
1466 return "SETSCHEDULER";
1468 case EXIT_CPUAFFINITY
:
1469 return "CPUAFFINITY";
1477 case EXIT_CAPABILITIES
:
1478 return "CAPABILITIES";
1497 static const char* const exec_input_table
[_EXEC_INPUT_MAX
] = {
1498 [EXEC_INPUT_NULL
] = "null",
1499 [EXEC_INPUT_TTY
] = "tty",
1500 [EXEC_INPUT_TTY_FORCE
] = "tty-force",
1501 [EXEC_INPUT_TTY_FAIL
] = "tty-fail"
1504 static const char* const exec_output_table
[_EXEC_OUTPUT_MAX
] = {
1505 [EXEC_OUTPUT_INHERIT
] = "inherit",
1506 [EXEC_OUTPUT_NULL
] = "null",
1507 [EXEC_OUTPUT_TTY
] = "tty",
1508 [EXEC_OUTPUT_SYSLOG
] = "syslog",
1509 [EXEC_OUTPUT_KERNEL
] = "kernel"
1512 DEFINE_STRING_TABLE_LOOKUP(exec_output
, ExecOutput
);
1514 DEFINE_STRING_TABLE_LOOKUP(exec_input
, ExecInput
);