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. */
395 (void) fchown(fd, uid, -1);
396 (void) 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,
728 bool apply_permissions,
731 CGroupBonding *cgroup_bondings,
742 assert(fds || n_fds <= 0);
744 if (context->std_input == EXEC_INPUT_SOCKET ||
745 context->std_output == EXEC_OUTPUT_SOCKET ||
746 context->std_error == EXEC_OUTPUT_SOCKET) {
759 argv = command->argv;
761 if (!(line = exec_command_line(argv)))
764 log_debug("About to execute: %s", line);
768 if ((r = cgroup_bonding_realize_list(cgroup_bondings)))
771 if ((pid = fork()) < 0)
777 const char *username = NULL, *home = NULL;
778 uid_t uid = (uid_t) -1;
779 gid_t gid = (gid_t) -1;
780 char **our_env = NULL, **final_env = NULL;
782 int saved_stdout = -1, saved_stdin = -1;
783 bool keep_stdout = false, keep_stdin = false;
787 reset_all_signal_handlers();
789 if (sigemptyset(&ss) < 0 ||
790 sigprocmask(SIG_SETMASK, &ss, NULL) < 0) {
791 r = EXIT_SIGNAL_MASK;
795 if (!context->no_setsid)
804 /* Set up terminal for the question */
805 if ((r = setup_confirm_stdio(context,
806 &saved_stdin, &saved_stdout)))
809 /* Now ask the question. */
810 if (!(line = exec_command_line(argv))) {
815 r = ask(&response, "yns", "Execute %s? [Yes, No, Skip] ", line);
818 if (r < 0 || response == 'n') {
821 } else if (response == 's') {
826 /* Release terminal for the question */
827 if ((r = restore_confirm_stdio(context,
828 &saved_stdin, &saved_stdout,
829 &keep_stdin, &keep_stdout)))
834 if (setup_input(context, socket_fd) < 0) {
840 if (setup_output(context, socket_fd, file_name_from_path(command->path)) < 0) {
845 if (setup_error(context, socket_fd, file_name_from_path(command->path)) < 0) {
851 if ((r = cgroup_bonding_install_list(cgroup_bondings, 0)) < 0) {
856 if (context->oom_adjust_set) {
859 snprintf(t, sizeof(t), "%i", context->oom_adjust);
862 if (write_one_line_file("/proc/self/oom_adj", t) < 0) {
868 if (context->nice_set)
869 if (setpriority(PRIO_PROCESS, 0, context->nice) < 0) {
874 if (context->cpu_sched_set) {
875 struct sched_param param;
878 param.sched_priority = context->cpu_sched_priority;
880 if (sched_setscheduler(0, context->cpu_sched_policy |
881 (context->cpu_sched_reset_on_fork ? SCHED_RESET_ON_FORK : 0), ¶m) < 0) {
882 r = EXIT_SETSCHEDULER;
887 if (context->cpu_affinity_set)
888 if (sched_setaffinity(0, sizeof(context->cpu_affinity), &context->cpu_affinity) < 0) {
889 r = EXIT_CPUAFFINITY;
893 if (context->ioprio_set)
894 if (ioprio_set(IOPRIO_WHO_PROCESS, 0, context->ioprio) < 0) {
899 if (context->timer_slack_ns_set)
900 if (prctl(PR_SET_TIMERSLACK, context->timer_slack_ns_set) < 0) {
905 if (strv_length(context->read_write_dirs) > 0 ||
906 strv_length(context->read_only_dirs) > 0 ||
907 strv_length(context->inaccessible_dirs) > 0 ||
908 context->mount_flags != MS_SHARED ||
909 context->private_tmp)
910 if ((r = setup_namespace(
911 context->read_write_dirs,
912 context->read_only_dirs,
913 context->inaccessible_dirs,
914 context->private_tmp,
915 context->mount_flags)) < 0)
919 username = context->user;
920 if (get_user_creds(&username, &uid, &gid, &home) < 0) {
925 if (is_terminal_input(context->std_input))
926 if (chown_terminal(STDIN_FILENO, uid) < 0) {
932 if (apply_permissions)
933 if (enforce_groups(context, username, uid) < 0) {
938 umask(context->umask);
941 if (context->root_directory)
942 if (chroot(context->root_directory) < 0) {
947 if (chdir(context->working_directory ? context->working_directory : "/") < 0) {
955 if (asprintf(&d, "%s/%s",
956 context->root_directory ? context->root_directory : "",
957 context->working_directory ? context->working_directory : "") < 0) {
971 if (close_all_fds(fds, n_fds) < 0 ||
972 shift_fds(fds, n_fds) < 0 ||
973 flags_fds(fds, n_fds, context->non_blocking) < 0) {
978 if (apply_permissions) {
980 for (i = 0; i < RLIMIT_NLIMITS; i++) {
981 if (!context->rlimit[i])
984 if (setrlimit(i, context->rlimit[i]) < 0) {
991 if (enforce_user(context, uid) < 0) {
996 /* PR_GET_SECUREBITS is not priviliged, while
997 * PR_SET_SECUREBITS is. So to suppress
998 * potential EPERMs we'll try not to call
999 * PR_SET_SECUREBITS unless necessary. */
1000 if (prctl(PR_GET_SECUREBITS) != context->secure_bits)
1001 if (prctl(PR_SET_SECUREBITS, context->secure_bits) < 0) {
1002 r = EXIT_SECUREBITS;
1006 if (context->capabilities)
1007 if (cap_set_proc(context->capabilities) < 0) {
1008 r = EXIT_CAPABILITIES;
1013 if (!(our_env = new0(char*, 6))) {
1019 if (asprintf(our_env + n_env++, "LISTEN_PID=%llu", (unsigned long long) getpid()) < 0 ||
1020 asprintf(our_env + n_env++, "LISTEN_FDS=%u", n_fds) < 0) {
1026 if (asprintf(our_env + n_env++, "HOME=%s", home) < 0) {
1032 if (asprintf(our_env + n_env++, "LOGNAME=%s", username) < 0 ||
1033 asprintf(our_env + n_env++, "USER=%s", username) < 0) {
1040 if (!(final_env = strv_env_merge(environment, our_env, context->environment, NULL))) {
1045 execve(command->path, argv, final_env);
1050 strv_free(final_env);
1052 if (saved_stdin >= 0)
1053 close_nointr_nofail(saved_stdin);
1055 if (saved_stdout >= 0)
1056 close_nointr_nofail(saved_stdout);
1061 /* We add the new process to the cgroup both in the child (so
1062 * that we can be sure that no user code is ever executed
1063 * outside of the cgroup) and in the parent (so that we can be
1064 * sure that when we kill the cgroup the process will be
1066 if (cgroup_bondings)
1067 cgroup_bonding_install_list(cgroup_bondings, pid);
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);