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>
45 #include "securebits.h"
47 #include "namespace.h"
49 /* This assumes there is a 'tty' group */
52 static int shift_fds(int fds
[], unsigned n_fds
) {
53 int start
, restart_from
;
58 /* Modifies the fds array! (sorts it) */
68 for (i
= start
; i
< (int) n_fds
; i
++) {
71 /* Already at right index? */
75 if ((nfd
= fcntl(fds
[i
], F_DUPFD
, i
+3)) < 0)
78 close_nointr_nofail(fds
[i
]);
81 /* Hmm, the fd we wanted isn't free? Then
82 * let's remember that and try again from here*/
83 if (nfd
!= i
+3 && restart_from
< 0)
96 static int flags_fds(const int fds
[], unsigned n_fds
, bool nonblock
) {
105 /* Drops/Sets O_NONBLOCK and FD_CLOEXEC from the file flags */
107 for (i
= 0; i
< n_fds
; i
++) {
109 if ((r
= fd_nonblock(fds
[i
], nonblock
)) < 0)
112 /* We unconditionally drop FD_CLOEXEC from the fds,
113 * since after all we want to pass these fds to our
116 if ((r
= fd_cloexec(fds
[i
], false)) < 0)
123 static const char *tty_path(const ExecContext
*context
) {
126 if (context
->tty_path
)
127 return context
->tty_path
;
129 return "/dev/console";
132 static int open_null_as(int flags
, int nfd
) {
137 if ((fd
= open("/dev/null", flags
|O_NOCTTY
)) < 0)
141 r
= dup2(fd
, nfd
) < 0 ? -errno
: nfd
;
142 close_nointr_nofail(fd
);
149 static int connect_logger_as(const ExecContext
*context
, ExecOutput output
, const char *ident
, int nfd
) {
153 struct sockaddr_un un
;
157 assert(output
< _EXEC_OUTPUT_MAX
);
161 if ((fd
= socket(AF_UNIX
, SOCK_STREAM
, 0)) < 0)
165 sa
.sa
.sa_family
= AF_UNIX
;
166 strncpy(sa
.un
.sun_path
+1, LOGGER_SOCKET
, sizeof(sa
.un
.sun_path
)-1);
168 if (connect(fd
, &sa
.sa
, sizeof(sa
)) < 0) {
169 close_nointr_nofail(fd
);
173 if (shutdown(fd
, SHUT_RD
) < 0) {
174 close_nointr_nofail(fd
);
178 /* We speak a very simple protocol between log server
179 * and client: one line for the log destination (kmsg
180 * or syslog), followed by the priority field,
181 * followed by the process name. Since we replaced
182 * stdin/stderr we simple use stdio to write to
183 * it. Note that we use stderr, to minimize buffer
184 * flushing issues. */
190 output
== EXEC_OUTPUT_KERNEL
? "kmsg" : "syslog",
191 context
->syslog_priority
,
192 context
->syslog_identifier
? context
->syslog_identifier
: ident
);
195 r
= dup2(fd
, nfd
) < 0 ? -errno
: nfd
;
196 close_nointr_nofail(fd
);
202 static int open_terminal_as(const char *path
, mode_t mode
, int nfd
) {
208 if ((fd
= open_terminal(path
, mode
| O_NOCTTY
)) < 0)
212 r
= dup2(fd
, nfd
) < 0 ? -errno
: nfd
;
213 close_nointr_nofail(fd
);
220 static bool is_terminal_input(ExecInput i
) {
222 i
== EXEC_INPUT_TTY
||
223 i
== EXEC_INPUT_TTY_FORCE
||
224 i
== EXEC_INPUT_TTY_FAIL
;
227 static int fixup_input(const ExecContext
*context
, int socket_fd
) {
230 if (socket_fd
< 0 && context
->std_input
== EXEC_INPUT_SOCKET
)
231 return EXEC_INPUT_NULL
;
233 return context
->std_input
;
236 static int fixup_output(const ExecContext
*context
, int socket_fd
) {
239 if (socket_fd
< 0 && context
->std_output
== EXEC_OUTPUT_SOCKET
)
240 return EXEC_OUTPUT_INHERIT
;
242 return context
->std_output
;
245 static int fixup_error(const ExecContext
*context
, int socket_fd
) {
248 if (socket_fd
< 0 && context
->std_error
== EXEC_OUTPUT_SOCKET
)
249 return EXEC_OUTPUT_INHERIT
;
251 return context
->std_error
;
254 static int setup_input(const ExecContext
*context
, int socket_fd
) {
259 i
= fixup_input(context
, socket_fd
);
263 case EXEC_INPUT_NULL
:
264 return open_null_as(O_RDONLY
, STDIN_FILENO
);
267 case EXEC_INPUT_TTY_FORCE
:
268 case EXEC_INPUT_TTY_FAIL
: {
271 if ((fd
= acquire_terminal(
273 i
== EXEC_INPUT_TTY_FAIL
,
274 i
== EXEC_INPUT_TTY_FORCE
)) < 0)
277 if (fd
!= STDIN_FILENO
) {
278 r
= dup2(fd
, STDIN_FILENO
) < 0 ? -errno
: STDIN_FILENO
;
279 close_nointr_nofail(fd
);
286 case EXEC_INPUT_SOCKET
:
287 return dup2(socket_fd
, STDIN_FILENO
) < 0 ? -errno
: STDIN_FILENO
;
290 assert_not_reached("Unknown input type");
294 static int setup_output(const ExecContext
*context
, int socket_fd
, const char *ident
) {
301 i
= fixup_input(context
, socket_fd
);
302 o
= fixup_output(context
, socket_fd
);
304 /* This expects the input is already set up */
308 case EXEC_OUTPUT_INHERIT
:
310 /* If the input is connected to a terminal, inherit that... */
311 if (is_terminal_input(i
) || i
== EXEC_INPUT_SOCKET
)
312 return dup2(STDIN_FILENO
, STDOUT_FILENO
) < 0 ? -errno
: STDOUT_FILENO
;
316 case EXEC_OUTPUT_NULL
:
317 return open_null_as(O_WRONLY
, STDOUT_FILENO
);
319 case EXEC_OUTPUT_TTY
:
320 if (is_terminal_input(i
))
321 return dup2(STDIN_FILENO
, STDOUT_FILENO
) < 0 ? -errno
: STDOUT_FILENO
;
323 /* We don't reset the terminal if this is just about output */
324 return open_terminal_as(tty_path(context
), O_WRONLY
, STDOUT_FILENO
);
326 case EXEC_OUTPUT_SYSLOG
:
327 case EXEC_OUTPUT_KERNEL
:
328 return connect_logger_as(context
, o
, ident
, STDOUT_FILENO
);
330 case EXEC_OUTPUT_SOCKET
:
331 assert(socket_fd
>= 0);
332 return dup2(socket_fd
, STDOUT_FILENO
) < 0 ? -errno
: STDOUT_FILENO
;
335 assert_not_reached("Unknown output type");
339 static int setup_error(const ExecContext
*context
, int socket_fd
, const char *ident
) {
346 i
= fixup_input(context
, socket_fd
);
347 o
= fixup_output(context
, socket_fd
);
348 e
= fixup_error(context
, socket_fd
);
350 /* This expects the input and output are already set up */
352 /* Don't change the stderr file descriptor if we inherit all
353 * the way and are not on a tty */
354 if (e
== EXEC_OUTPUT_INHERIT
&&
355 o
== EXEC_OUTPUT_INHERIT
&&
356 !is_terminal_input(i
))
357 return STDERR_FILENO
;
359 /* Duplicate form stdout if possible */
360 if (e
== o
|| e
== EXEC_OUTPUT_INHERIT
)
361 return dup2(STDOUT_FILENO
, STDERR_FILENO
) < 0 ? -errno
: STDERR_FILENO
;
365 case EXEC_OUTPUT_NULL
:
366 return open_null_as(O_WRONLY
, STDERR_FILENO
);
368 case EXEC_OUTPUT_TTY
:
369 if (is_terminal_input(i
))
370 return dup2(STDIN_FILENO
, STDERR_FILENO
) < 0 ? -errno
: STDERR_FILENO
;
372 /* We don't reset the terminal if this is just about output */
373 return open_terminal_as(tty_path(context
), O_WRONLY
, STDERR_FILENO
);
375 case EXEC_OUTPUT_SYSLOG
:
376 case EXEC_OUTPUT_KERNEL
:
377 return connect_logger_as(context
, e
, ident
, STDERR_FILENO
);
379 case EXEC_OUTPUT_SOCKET
:
380 assert(socket_fd
>= 0);
381 return dup2(socket_fd
, STDERR_FILENO
) < 0 ? -errno
: STDERR_FILENO
;
384 assert_not_reached("Unknown error type");
388 static int chown_terminal(int fd
, uid_t uid
) {
393 /* This might fail. What matters are the results. */
395 fchmod(fd
, TTY_MODE
);
397 if (fstat(fd
, &st
) < 0)
400 if (st
.st_uid
!= uid
|| (st
.st_mode
& 0777) != TTY_MODE
)
406 static int setup_confirm_stdio(const ExecContext
*context
,
408 int *_saved_stdout
) {
409 int fd
= -1, saved_stdin
, saved_stdout
= -1, r
;
412 assert(_saved_stdin
);
413 assert(_saved_stdout
);
415 /* This returns positive EXIT_xxx return values instead of
416 * negative errno style values! */
418 if ((saved_stdin
= fcntl(STDIN_FILENO
, F_DUPFD
, 3)) < 0)
421 if ((saved_stdout
= fcntl(STDOUT_FILENO
, F_DUPFD
, 3)) < 0) {
426 if ((fd
= acquire_terminal(
428 context
->std_input
== EXEC_INPUT_TTY_FAIL
,
429 context
->std_input
== EXEC_INPUT_TTY_FORCE
)) < 0) {
434 if (chown_terminal(fd
, getuid()) < 0) {
439 if (dup2(fd
, STDIN_FILENO
) < 0) {
444 if (dup2(fd
, STDOUT_FILENO
) < 0) {
450 close_nointr_nofail(fd
);
452 *_saved_stdin
= saved_stdin
;
453 *_saved_stdout
= saved_stdout
;
458 if (saved_stdout
>= 0)
459 close_nointr_nofail(saved_stdout
);
461 if (saved_stdin
>= 0)
462 close_nointr_nofail(saved_stdin
);
465 close_nointr_nofail(fd
);
470 static int restore_conform_stdio(const ExecContext
*context
,
478 assert(*saved_stdin
>= 0);
479 assert(saved_stdout
);
480 assert(*saved_stdout
>= 0);
482 /* This returns positive EXIT_xxx return values instead of
483 * negative errno style values! */
485 if (is_terminal_input(context
->std_input
)) {
487 /* The service wants terminal input. */
491 context
->std_output
== EXEC_OUTPUT_INHERIT
||
492 context
->std_output
== EXEC_OUTPUT_TTY
;
495 /* If the service doesn't want a controlling terminal,
496 * then we need to get rid entirely of what we have
499 if (release_terminal() < 0)
502 if (dup2(*saved_stdin
, STDIN_FILENO
) < 0)
505 if (dup2(*saved_stdout
, STDOUT_FILENO
) < 0)
508 *keep_stdout
= *keep_stdin
= false;
514 static int get_group_creds(const char *groupname
, gid_t
*gid
) {
521 /* We enforce some special rules for gid=0: in order to avoid
522 * NSS lookups for root we hardcode its data. */
524 if (streq(groupname
, "root") || streq(groupname
, "0")) {
529 if (safe_atolu(groupname
, &lu
) >= 0) {
531 g
= getgrgid((gid_t
) lu
);
534 g
= getgrnam(groupname
);
538 return errno
!= 0 ? -errno
: -ESRCH
;
544 static int get_user_creds(const char **username
, uid_t
*uid
, gid_t
*gid
, const char **home
) {
554 /* We enforce some special rules for uid=0: in order to avoid
555 * NSS lookups for root we hardcode its data. */
557 if (streq(*username
, "root") || streq(*username
, "0")) {
565 if (safe_atolu(*username
, &lu
) >= 0) {
567 p
= getpwuid((uid_t
) lu
);
569 /* If there are multiple users with the same id, make
570 * sure to leave $USER to the configured value instead
571 * of the first occurence in the database. However if
572 * the uid was configured by a numeric uid, then let's
573 * pick the real username from /etc/passwd. */
575 *username
= p
->pw_name
;
578 p
= getpwnam(*username
);
582 return errno
!= 0 ? -errno
: -ESRCH
;
590 static int enforce_groups(const ExecContext
*context
, const char *username
, gid_t gid
) {
591 bool keep_groups
= false;
596 /* Lookup and ser GID and supplementary group list. Here too
597 * we avoid NSS lookups for gid=0. */
599 if (context
->group
|| username
) {
602 if ((r
= get_group_creds(context
->group
, &gid
)) < 0)
605 /* First step, initialize groups from /etc/groups */
606 if (username
&& gid
!= 0) {
607 if (initgroups(username
, gid
) < 0)
613 /* Second step, set our gids */
614 if (setresgid(gid
, gid
, gid
) < 0)
618 if (context
->supplementary_groups
) {
623 /* Final step, initialize any manually set supplementary groups */
624 ngroups_max
= (int) sysconf(_SC_NGROUPS_MAX
);
626 if (!(gids
= new(gid_t
, ngroups_max
)))
630 if ((k
= getgroups(ngroups_max
, gids
)) < 0) {
637 STRV_FOREACH(i
, context
->supplementary_groups
) {
639 if (k
>= ngroups_max
) {
644 if ((r
= get_group_creds(*i
, gids
+k
)) < 0) {
652 if (setgroups(k
, gids
) < 0) {
663 static int enforce_user(const ExecContext
*context
, uid_t uid
) {
667 /* Sets (but doesn't lookup) the uid and make sure we keep the
668 * capabilities while doing so. */
670 if (context
->capabilities
) {
672 static const cap_value_t bits
[] = {
673 CAP_SETUID
, /* Necessary so that we can run setresuid() below */
674 CAP_SETPCAP
/* Necessary so that we can set PR_SET_SECUREBITS later on */
677 /* First step: If we need to keep capabilities but
678 * drop privileges we need to make sure we keep our
679 * caps, whiel we drop priviliges. */
681 int sb
= context
->secure_bits
|SECURE_KEEP_CAPS
;
683 if (prctl(PR_GET_SECUREBITS
) != sb
)
684 if (prctl(PR_SET_SECUREBITS
, sb
) < 0)
688 /* Second step: set the capabilites. This will reduce
689 * the capabilities to the minimum we need. */
691 if (!(d
= cap_dup(context
->capabilities
)))
694 if (cap_set_flag(d
, CAP_EFFECTIVE
, ELEMENTSOF(bits
), bits
, CAP_SET
) < 0 ||
695 cap_set_flag(d
, CAP_PERMITTED
, ELEMENTSOF(bits
), bits
, CAP_SET
) < 0) {
701 if (cap_set_proc(d
) < 0) {
710 /* Third step: actually set the uids */
711 if (setresuid(uid
, uid
, uid
) < 0)
714 /* At this point we should have all necessary capabilities but
715 are otherwise a normal user. However, the caps might got
716 corrupted due to the setresuid() so we need clean them up
717 later. This is done outside of this call. */
722 int exec_spawn(ExecCommand
*command
,
724 const ExecContext
*context
,
725 int fds
[], unsigned n_fds
,
726 bool apply_permissions
,
729 CGroupBonding
*cgroup_bondings
,
740 assert(fds
|| n_fds
<= 0);
742 if (context
->std_input
== EXEC_INPUT_SOCKET
||
743 context
->std_output
== EXEC_OUTPUT_SOCKET
||
744 context
->std_error
== EXEC_OUTPUT_SOCKET
) {
757 argv
= command
->argv
;
759 if (!(line
= exec_command_line(argv
)))
762 log_debug("About to execute: %s", line
);
766 if ((r
= cgroup_bonding_realize_list(cgroup_bondings
)))
769 if ((pid
= fork()) < 0)
775 const char *username
= NULL
, *home
= NULL
;
776 uid_t uid
= (uid_t
) -1;
777 gid_t gid
= (gid_t
) -1;
778 char **our_env
= NULL
, **final_env
= NULL
;
780 int saved_stdout
= -1, saved_stdin
= -1;
781 bool keep_stdout
= false, keep_stdin
= false;
785 reset_all_signal_handlers();
787 if (sigemptyset(&ss
) < 0 ||
788 sigprocmask(SIG_SETMASK
, &ss
, NULL
) < 0) {
789 r
= EXIT_SIGNAL_MASK
;
793 if (!context
->no_setsid
)
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) {
903 if (strv_length(context
->read_write_dirs
) > 0 ||
904 strv_length(context
->read_only_dirs
) > 0 ||
905 strv_length(context
->inaccessible_dirs
) > 0 ||
906 context
->mount_flags
!= MS_SHARED
||
907 context
->private_tmp
)
908 if ((r
= setup_namespace(
909 context
->read_write_dirs
,
910 context
->read_only_dirs
,
911 context
->inaccessible_dirs
,
912 context
->private_tmp
,
913 context
->mount_flags
)) < 0)
917 username
= context
->user
;
918 if (get_user_creds(&username
, &uid
, &gid
, &home
) < 0) {
923 if (is_terminal_input(context
->std_input
))
924 if (chown_terminal(STDIN_FILENO
, uid
) < 0) {
930 if (apply_permissions
)
931 if (enforce_groups(context
, username
, uid
) < 0) {
936 umask(context
->umask
);
939 if (context
->root_directory
)
940 if (chroot(context
->root_directory
) < 0) {
945 if (chdir(context
->working_directory
? context
->working_directory
: "/") < 0) {
953 if (asprintf(&d
, "%s/%s",
954 context
->root_directory
? context
->root_directory
: "",
955 context
->working_directory
? context
->working_directory
: "") < 0) {
969 if (close_all_fds(fds
, n_fds
) < 0 ||
970 shift_fds(fds
, n_fds
) < 0 ||
971 flags_fds(fds
, n_fds
, context
->non_blocking
) < 0) {
976 if (apply_permissions
) {
978 for (i
= 0; i
< RLIMIT_NLIMITS
; i
++) {
979 if (!context
->rlimit
[i
])
982 if (setrlimit(i
, context
->rlimit
[i
]) < 0) {
989 if (enforce_user(context
, uid
) < 0) {
994 /* PR_GET_SECUREBITS is not priviliged, while
995 * PR_SET_SECUREBITS is. So to suppress
996 * potential EPERMs we'll try not to call
997 * PR_SET_SECUREBITS unless necessary. */
998 if (prctl(PR_GET_SECUREBITS
) != context
->secure_bits
)
999 if (prctl(PR_SET_SECUREBITS
, context
->secure_bits
) < 0) {
1000 r
= EXIT_SECUREBITS
;
1004 if (context
->capabilities
)
1005 if (cap_set_proc(context
->capabilities
) < 0) {
1006 r
= EXIT_CAPABILITIES
;
1011 if (!(our_env
= new0(char*, 6))) {
1017 if (asprintf(our_env
+ n_env
++, "LISTEN_PID=%llu", (unsigned long long) getpid()) < 0 ||
1018 asprintf(our_env
+ n_env
++, "LISTEN_FDS=%u", n_fds
) < 0) {
1024 if (asprintf(our_env
+ n_env
++, "HOME=%s", home
) < 0) {
1030 if (asprintf(our_env
+ n_env
++, "LOGNAME=%s", username
) < 0 ||
1031 asprintf(our_env
+ n_env
++, "USER=%s", username
) < 0) {
1036 if (!(final_env
= strv_env_merge(environ
, our_env
, context
->environment
, NULL
))) {
1041 execve(command
->path
, argv
, final_env
);
1046 strv_free(final_env
);
1048 if (saved_stdin
>= 0)
1049 close_nointr_nofail(saved_stdin
);
1051 if (saved_stdout
>= 0)
1052 close_nointr_nofail(saved_stdout
);
1057 /* We add the new process to the cgroup both in the child (so
1058 * that we can be sure that no user code is ever executed
1059 * outside of the cgroup) and in the parent (so that we can be
1060 * sure that when we kill the cgroup the process will be
1062 if (cgroup_bondings
)
1063 if ((r
= cgroup_bonding_install_list(cgroup_bondings
, pid
)) < 0) {
1068 log_debug("Forked %s as %llu", command
->path
, (unsigned long long) pid
);
1070 command
->exec_status
.pid
= pid
;
1071 command
->exec_status
.start_timestamp
= now(CLOCK_REALTIME
);
1077 void exec_context_init(ExecContext
*c
) {
1081 c
->ioprio
= IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE
, 0);
1082 c
->cpu_sched_policy
= SCHED_OTHER
;
1083 c
->syslog_priority
= LOG_DAEMON
|LOG_INFO
;
1084 c
->mount_flags
= MS_SHARED
;
1087 void exec_context_done(ExecContext
*c
) {
1092 strv_free(c
->environment
);
1093 c
->environment
= NULL
;
1095 for (l
= 0; l
< ELEMENTSOF(c
->rlimit
); l
++) {
1097 c
->rlimit
[l
] = NULL
;
1100 free(c
->working_directory
);
1101 c
->working_directory
= NULL
;
1102 free(c
->root_directory
);
1103 c
->root_directory
= NULL
;
1108 free(c
->syslog_identifier
);
1109 c
->syslog_identifier
= NULL
;
1117 strv_free(c
->supplementary_groups
);
1118 c
->supplementary_groups
= NULL
;
1120 if (c
->capabilities
) {
1121 cap_free(c
->capabilities
);
1122 c
->capabilities
= NULL
;
1125 strv_free(c
->read_only_dirs
);
1126 c
->read_only_dirs
= NULL
;
1128 strv_free(c
->read_write_dirs
);
1129 c
->read_write_dirs
= NULL
;
1131 strv_free(c
->inaccessible_dirs
);
1132 c
->inaccessible_dirs
= NULL
;
1135 void exec_command_done(ExecCommand
*c
) {
1145 void exec_command_done_array(ExecCommand
*c
, unsigned n
) {
1148 for (i
= 0; i
< n
; i
++)
1149 exec_command_done(c
+i
);
1152 void exec_command_free_list(ExecCommand
*c
) {
1156 LIST_REMOVE(ExecCommand
, command
, c
, i
);
1157 exec_command_done(i
);
1162 void exec_command_free_array(ExecCommand
**c
, unsigned n
) {
1165 for (i
= 0; i
< n
; i
++) {
1166 exec_command_free_list(c
[i
]);
1171 static void strv_fprintf(FILE *f
, char **l
) {
1177 fprintf(f
, " %s", *g
);
1180 void exec_context_dump(ExecContext
*c
, FILE* f
, const char *prefix
) {
1192 "%sWorkingDirectory: %s\n"
1193 "%sRootDirectory: %s\n"
1194 "%sNonBlocking: %s\n"
1195 "%sPrivateTmp: %s\n",
1197 prefix
, c
->working_directory
? c
->working_directory
: "/",
1198 prefix
, c
->root_directory
? c
->root_directory
: "/",
1199 prefix
, yes_no(c
->non_blocking
),
1200 prefix
, yes_no(c
->private_tmp
));
1203 for (e
= c
->environment
; *e
; e
++)
1204 fprintf(f
, "%sEnvironment: %s\n", prefix
, *e
);
1211 if (c
->oom_adjust_set
)
1213 "%sOOMAdjust: %i\n",
1214 prefix
, c
->oom_adjust
);
1216 for (i
= 0; i
< RLIM_NLIMITS
; i
++)
1218 fprintf(f
, "%s%s: %llu\n", prefix
, rlimit_to_string(i
), (unsigned long long) c
->rlimit
[i
]->rlim_max
);
1222 "%sIOSchedulingClass: %s\n"
1223 "%sIOPriority: %i\n",
1224 prefix
, ioprio_class_to_string(IOPRIO_PRIO_CLASS(c
->ioprio
)),
1225 prefix
, (int) IOPRIO_PRIO_DATA(c
->ioprio
));
1227 if (c
->cpu_sched_set
)
1229 "%sCPUSchedulingPolicy: %s\n"
1230 "%sCPUSchedulingPriority: %i\n"
1231 "%sCPUSchedulingResetOnFork: %s\n",
1232 prefix
, sched_policy_to_string(c
->cpu_sched_policy
),
1233 prefix
, c
->cpu_sched_priority
,
1234 prefix
, yes_no(c
->cpu_sched_reset_on_fork
));
1236 if (c
->cpu_affinity_set
) {
1237 fprintf(f
, "%sCPUAffinity:", prefix
);
1238 for (i
= 0; i
< CPU_SETSIZE
; i
++)
1239 if (CPU_ISSET(i
, &c
->cpu_affinity
))
1240 fprintf(f
, " %i", i
);
1244 if (c
->timer_slack_ns_set
)
1245 fprintf(f
, "%sTimerSlackNS: %lu\n", prefix
, c
->timer_slack_ns
);
1248 "%sStandardInput: %s\n"
1249 "%sStandardOutput: %s\n"
1250 "%sStandardError: %s\n",
1251 prefix
, exec_input_to_string(c
->std_input
),
1252 prefix
, exec_output_to_string(c
->std_output
),
1253 prefix
, exec_output_to_string(c
->std_error
));
1258 prefix
, c
->tty_path
);
1260 if (c
->std_output
== EXEC_OUTPUT_SYSLOG
|| c
->std_output
== EXEC_OUTPUT_KERNEL
||
1261 c
->std_error
== EXEC_OUTPUT_SYSLOG
|| c
->std_error
== EXEC_OUTPUT_KERNEL
)
1263 "%sSyslogFacility: %s\n"
1264 "%sSyslogLevel: %s\n",
1265 prefix
, log_facility_to_string(LOG_FAC(c
->syslog_priority
)),
1266 prefix
, log_level_to_string(LOG_PRI(c
->syslog_priority
)));
1268 if (c
->capabilities
) {
1270 if ((t
= cap_to_text(c
->capabilities
, NULL
))) {
1271 fprintf(f
, "%sCapabilities: %s\n",
1278 fprintf(f
, "%sSecure Bits:%s%s%s%s%s%s\n",
1280 (c
->secure_bits
& SECURE_KEEP_CAPS
) ? " keep-caps" : "",
1281 (c
->secure_bits
& SECURE_KEEP_CAPS_LOCKED
) ? " keep-caps-locked" : "",
1282 (c
->secure_bits
& SECURE_NO_SETUID_FIXUP
) ? " no-setuid-fixup" : "",
1283 (c
->secure_bits
& SECURE_NO_SETUID_FIXUP_LOCKED
) ? " no-setuid-fixup-locked" : "",
1284 (c
->secure_bits
& SECURE_NOROOT
) ? " noroot" : "",
1285 (c
->secure_bits
& SECURE_NOROOT_LOCKED
) ? "noroot-locked" : "");
1287 if (c
->capability_bounding_set_drop
) {
1288 fprintf(f
, "%sCapabilityBoundingSetDrop:", prefix
);
1290 for (i
= 0; i
<= CAP_LAST_CAP
; i
++)
1291 if (c
->capability_bounding_set_drop
& (1 << i
)) {
1294 if ((t
= cap_to_name(i
))) {
1295 fprintf(f
, " %s", t
);
1304 fprintf(f
, "%sUser: %s", prefix
, c
->user
);
1306 fprintf(f
, "%sGroup: %s", prefix
, c
->group
);
1308 if (strv_length(c
->supplementary_groups
) > 0) {
1309 fprintf(f
, "%sSupplementaryGroups:", prefix
);
1310 strv_fprintf(f
, c
->supplementary_groups
);
1314 if (strv_length(c
->read_write_dirs
) > 0) {
1315 fprintf(f
, "%sReadWriteDirs:", prefix
);
1316 strv_fprintf(f
, c
->read_write_dirs
);
1320 if (strv_length(c
->read_only_dirs
) > 0) {
1321 fprintf(f
, "%sReadOnlyDirs:", prefix
);
1322 strv_fprintf(f
, c
->read_only_dirs
);
1326 if (strv_length(c
->inaccessible_dirs
) > 0) {
1327 fprintf(f
, "%sInaccessibleDirs:", prefix
);
1328 strv_fprintf(f
, c
->inaccessible_dirs
);
1333 void exec_status_fill(ExecStatus
*s
, pid_t pid
, int code
, int status
) {
1337 s
->exit_timestamp
= now(CLOCK_REALTIME
);
1343 void exec_status_dump(ExecStatus
*s
, FILE *f
, const char *prefix
) {
1344 char buf
[FORMAT_TIMESTAMP_MAX
];
1357 prefix
, (unsigned long long) s
->pid
);
1359 if (s
->start_timestamp
> 0)
1361 "%sStart Timestamp: %s\n",
1362 prefix
, format_timestamp(buf
, sizeof(buf
), s
->start_timestamp
));
1364 if (s
->exit_timestamp
> 0)
1366 "%sExit Timestamp: %s\n"
1368 "%sExit Status: %i\n",
1369 prefix
, format_timestamp(buf
, sizeof(buf
), s
->exit_timestamp
),
1370 prefix
, sigchld_code_to_string(s
->code
),
1374 char *exec_command_line(char **argv
) {
1382 STRV_FOREACH(a
, argv
)
1385 if (!(n
= new(char, k
)))
1389 STRV_FOREACH(a
, argv
) {
1396 if (strpbrk(*a
, WHITESPACE
)) {
1407 /* FIXME: this doesn't really handle arguments that have
1408 * spaces and ticks in them */
1413 void exec_command_dump(ExecCommand
*c
, FILE *f
, const char *prefix
) {
1415 const char *prefix2
;
1424 p2
= strappend(prefix
, "\t");
1425 prefix2
= p2
? p2
: prefix
;
1427 cmd
= exec_command_line(c
->argv
);
1430 "%sCommand Line: %s\n",
1431 prefix
, cmd
? cmd
: strerror(ENOMEM
));
1435 exec_status_dump(&c
->exec_status
, f
, prefix2
);
1440 void exec_command_dump_list(ExecCommand
*c
, FILE *f
, const char *prefix
) {
1446 LIST_FOREACH(command
, c
, c
)
1447 exec_command_dump(c
, f
, prefix
);
1450 void exec_command_append_list(ExecCommand
**l
, ExecCommand
*e
) {
1457 /* It's kinda important that we keep the order here */
1458 LIST_FIND_TAIL(ExecCommand
, command
, *l
, end
);
1459 LIST_INSERT_AFTER(ExecCommand
, command
, *l
, end
, e
);
1464 int exec_command_set(ExecCommand
*c
, const char *path
, ...) {
1472 l
= strv_new_ap(path
, ap
);
1478 if (!(p
= strdup(path
))) {
1492 const char* exit_status_to_string(ExitStatus status
) {
1494 /* We cast to int here, so that -Wenum doesn't complain that
1495 * EXIT_SUCCESS/EXIT_FAILURE aren't in the enum */
1497 switch ((int) status
) {
1505 case EXIT_INVALIDARGUMENT
:
1506 return "INVALIDARGUMENT";
1508 case EXIT_NOTIMPLEMENTED
:
1509 return "NOTIMPLEMENTED";
1511 case EXIT_NOPERMISSION
:
1512 return "NOPERMISSION";
1514 case EXIT_NOTINSTALLED
:
1515 return "NOTINSSTALLED";
1517 case EXIT_NOTCONFIGURED
:
1518 return "NOTCONFIGURED";
1520 case EXIT_NOTRUNNING
:
1521 return "NOTRUNNING";
1541 case EXIT_OOM_ADJUST
:
1542 return "OOM_ADJUST";
1544 case EXIT_SIGNAL_MASK
:
1545 return "SIGNAL_MASK";
1559 case EXIT_TIMERSLACK
:
1560 return "TIMERSLACK";
1562 case EXIT_SECUREBITS
:
1563 return "SECUREBITS";
1565 case EXIT_SETSCHEDULER
:
1566 return "SETSCHEDULER";
1568 case EXIT_CPUAFFINITY
:
1569 return "CPUAFFINITY";
1577 case EXIT_CAPABILITIES
:
1578 return "CAPABILITIES";
1597 static const char* const exec_input_table
[_EXEC_INPUT_MAX
] = {
1598 [EXEC_INPUT_NULL
] = "null",
1599 [EXEC_INPUT_TTY
] = "tty",
1600 [EXEC_INPUT_TTY_FORCE
] = "tty-force",
1601 [EXEC_INPUT_TTY_FAIL
] = "tty-fail",
1602 [EXEC_INPUT_SOCKET
] = "socket"
1605 static const char* const exec_output_table
[_EXEC_OUTPUT_MAX
] = {
1606 [EXEC_OUTPUT_INHERIT
] = "inherit",
1607 [EXEC_OUTPUT_NULL
] = "null",
1608 [EXEC_OUTPUT_TTY
] = "tty",
1609 [EXEC_OUTPUT_SYSLOG
] = "syslog",
1610 [EXEC_OUTPUT_KERNEL
] = "kernel",
1611 [EXEC_OUTPUT_SOCKET
] = "socket"
1614 DEFINE_STRING_TABLE_LOOKUP(exec_output
, ExecOutput
);
1616 DEFINE_STRING_TABLE_LOOKUP(exec_input
, ExecInput
);