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 ||
346 st.st_mode != TTY_MODE)
352 static int setup_confirm_stdio(const ExecContext *context,
354 int *_saved_stdout) {
355 int fd = -1, saved_stdin, saved_stdout = -1, r;
358 assert(_saved_stdin);
359 assert(_saved_stdout);
361 /* This returns positive EXIT_xxx return values instead of
362 * negative errno style values! */
364 if ((saved_stdin = fcntl(STDIN_FILENO, F_DUPFD, 3)) < 0)
367 if ((saved_stdout = fcntl(STDOUT_FILENO, F_DUPFD, 3)) < 0) {
372 if ((fd = acquire_terminal(
374 context->std_input == EXEC_INPUT_TTY_FAIL,
375 context->std_input == EXEC_INPUT_TTY_FORCE)) < 0) {
380 if (chown_terminal(fd, getuid()) < 0) {
385 if (dup2(fd, STDIN_FILENO) < 0) {
390 if (dup2(fd, STDOUT_FILENO) < 0) {
396 close_nointr_nofail(fd);
398 *_saved_stdin = saved_stdin;
399 *_saved_stdout = saved_stdout;
404 if (saved_stdout >= 0)
405 close_nointr_nofail(saved_stdout);
407 if (saved_stdin >= 0)
408 close_nointr_nofail(saved_stdin);
411 close_nointr_nofail(fd);
416 static int restore_conform_stdio(const ExecContext *context,
424 assert(*saved_stdin >= 0);
425 assert(saved_stdout);
426 assert(*saved_stdout >= 0);
428 /* This returns positive EXIT_xxx return values instead of
429 * negative errno style values! */
431 if (is_terminal_input(context->std_input)) {
433 /* The service wants terminal input. */
437 context->std_output == EXEC_OUTPUT_INHERIT ||
438 context->std_output == EXEC_OUTPUT_TTY;
441 /* If the service doesn't want a controlling terminal,
442 * then we need to get rid entirely of what we have
445 if (release_terminal() < 0)
448 if (dup2(*saved_stdin, STDIN_FILENO) < 0)
451 if (dup2(*saved_stdout, STDOUT_FILENO) < 0)
454 *keep_stdout = *keep_stdin = false;
460 static int get_group_creds(const char *groupname, gid_t *gid) {
467 /* We enforce some special rules for gid=0: in order to avoid
468 * NSS lookups for root we hardcode its data. */
470 if (streq(groupname, "root") || streq(groupname, "0")) {
475 if (safe_atolu(groupname, &lu) >= 0) {
477 g = getgrgid((gid_t) lu);
480 g = getgrnam(groupname);
484 return errno != 0 ? -errno : -ESRCH;
490 static int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home) {
500 /* We enforce some special rules for uid=0: in order to avoid
501 * NSS lookups for root we hardcode its data. */
503 if (streq(*username, "root") || streq(*username, "0")) {
511 if (safe_atolu(*username, &lu) >= 0) {
513 p = getpwuid((uid_t) lu);
515 /* If there are multiple users with the same id, make
516 * sure to leave $USER to the configured value instead
517 * of the first occurence in the database. However if
518 * the uid was configured by a numeric uid, then let's
519 * pick the real username from /etc/passwd. */
521 *username = p->pw_name;
524 p = getpwnam(*username);
528 return errno != 0 ? -errno : -ESRCH;
536 static int enforce_groups(const ExecContext *context, const char *username, gid_t gid) {
537 bool keep_groups = false;
542 /* Lookup and ser GID and supplementary group list. Here too
543 * we avoid NSS lookups for gid=0. */
545 if (context->group || username) {
548 if ((r = get_group_creds(context->group, &gid)) < 0)
551 /* First step, initialize groups from /etc/groups */
552 if (username && gid != 0) {
553 if (initgroups(username, gid) < 0)
559 /* Second step, set our gids */
560 if (setresgid(gid, gid, gid) < 0)
564 if (context->supplementary_groups) {
569 /* Final step, initialize any manually set supplementary groups */
570 ngroups_max = (int) sysconf(_SC_NGROUPS_MAX);
572 if (!(gids = new(gid_t, ngroups_max)))
576 if ((k = getgroups(ngroups_max, gids)) < 0) {
583 STRV_FOREACH(i, context->supplementary_groups) {
585 if (k >= ngroups_max) {
590 if ((r = get_group_creds(*i, gids+k)) < 0) {
598 if (setgroups(k, gids) < 0) {
609 static int enforce_user(const ExecContext *context, uid_t uid) {
613 /* Sets (but doesn't lookup) the uid and make sure we keep the
614 * capabilities while doing so. */
616 if (context->capabilities) {
618 static const cap_value_t bits[] = {
619 CAP_SETUID, /* Necessary so that we can run setresuid() below */
620 CAP_SETPCAP /* Necessary so that we can set PR_SET_SECUREBITS later on */
623 /* First step: If we need to keep capabilities but
624 * drop privileges we need to make sure we keep our
625 * caps, whiel we drop priviliges. */
627 int sb = context->secure_bits|SECURE_KEEP_CAPS;
629 if (prctl(PR_GET_SECUREBITS) != sb)
630 if (prctl(PR_SET_SECUREBITS, sb) < 0)
634 /* Second step: set the capabilites. This will reduce
635 * the capabilities to the minimum we need. */
637 if (!(d = cap_dup(context->capabilities)))
640 if (cap_set_flag(d, CAP_EFFECTIVE, ELEMENTSOF(bits), bits, CAP_SET) < 0 ||
641 cap_set_flag(d, CAP_PERMITTED, ELEMENTSOF(bits), bits, CAP_SET) < 0) {
647 if (cap_set_proc(d) < 0) {
656 /* Third step: actually set the uids */
657 if (setresuid(uid, uid, uid) < 0)
660 /* At this point we should have all necessary capabilities but
661 are otherwise a normal user. However, the caps might got
662 corrupted due to the setresuid() so we need clean them up
663 later. This is done outside of this call. */
668 int exec_spawn(ExecCommand *command,
669 const ExecContext *context,
670 int fds[], unsigned n_fds,
671 bool apply_permissions,
674 CGroupBonding *cgroup_bondings,
684 assert(fds || n_fds <= 0);
686 if (!(line = exec_command_line(command)))
689 log_debug("About to execute: %s", line);
693 if ((r = cgroup_bonding_realize_list(cgroup_bondings)))
696 if ((pid = fork()) < 0)
702 const char *username = NULL, *home = NULL;
703 uid_t uid = (uid_t) -1;
704 gid_t gid = (gid_t) -1;
705 char **our_env = NULL, **final_env = NULL;
707 int saved_stdout = -1, saved_stdin = -1;
708 bool keep_stdout = false, keep_stdin = false;
712 reset_all_signal_handlers();
714 if (sigemptyset(&ss) < 0 ||
715 sigprocmask(SIG_SETMASK, &ss, NULL) < 0) {
716 r = EXIT_SIGNAL_MASK;
725 umask(context->umask);
730 /* Set up terminal for the question */
731 if ((r = setup_confirm_stdio(context,
732 &saved_stdin, &saved_stdout)))
735 /* Now ask the question. */
736 if (!(line = exec_command_line(command))) {
741 r = ask(&response, "yns", "Execute %s? [Yes, No, Skip] ", line);
744 if (r < 0 || response == 'n') {
747 } else if (response == 's') {
752 /* Release terminal for the question */
753 if ((r = restore_conform_stdio(context,
754 &saved_stdin, &saved_stdout,
755 &keep_stdin, &keep_stdout)))
760 if (setup_input(context) < 0) {
766 if (setup_output(context, file_name_from_path(command->path)) < 0) {
771 if (setup_error(context, file_name_from_path(command->path)) < 0) {
777 if ((r = cgroup_bonding_install_list(cgroup_bondings, 0)) < 0) {
782 if (context->oom_adjust_set) {
785 snprintf(t, sizeof(t), "%i", context->oom_adjust);
788 if (write_one_line_file("/proc/self/oom_adj", t) < 0) {
794 if (context->nice_set)
795 if (setpriority(PRIO_PROCESS, 0, context->nice) < 0) {
800 if (context->cpu_sched_set) {
801 struct sched_param param;
804 param.sched_priority = context->cpu_sched_priority;
806 if (sched_setscheduler(0, context->cpu_sched_policy |
807 (context->cpu_sched_reset_on_fork ? SCHED_RESET_ON_FORK : 0), ¶m) < 0) {
808 r = EXIT_SETSCHEDULER;
813 if (context->cpu_affinity_set)
814 if (sched_setaffinity(0, sizeof(context->cpu_affinity), &context->cpu_affinity) < 0) {
815 r = EXIT_CPUAFFINITY;
819 if (context->ioprio_set)
820 if (ioprio_set(IOPRIO_WHO_PROCESS, 0, context->ioprio) < 0) {
825 if (context->timer_slack_ns_set)
826 if (prctl(PR_SET_TIMERSLACK, context->timer_slack_ns_set) < 0) {
832 username = context->user;
833 if (get_user_creds(&username, &uid, &gid, &home) < 0) {
839 if (apply_permissions)
840 if (enforce_groups(context, username, uid) < 0) {
845 if (is_terminal_input(context->std_input))
846 if (chown_terminal(STDIN_FILENO, uid) < 0) {
852 if (context->root_directory)
853 if (chroot(context->root_directory) < 0) {
858 if (chdir(context->working_directory ? context->working_directory : "/") < 0) {
866 if (asprintf(&d, "%s/%s",
867 context->root_directory ? context->root_directory : "",
868 context->working_directory ? context->working_directory : "") < 0) {
882 if (close_all_fds(fds, n_fds) < 0 ||
883 shift_fds(fds, n_fds) < 0 ||
884 flags_fds(fds, n_fds, context->non_blocking) < 0) {
889 if (apply_permissions) {
891 for (i = 0; i < RLIMIT_NLIMITS; i++) {
892 if (!context->rlimit[i])
895 if (setrlimit(i, context->rlimit[i]) < 0) {
902 if (enforce_user(context, uid) < 0) {
907 /* PR_GET_SECUREBITS is not priviliged, while
908 * PR_SET_SECUREBITS is. So to suppress
909 * potential EPERMs we'll try not to call
910 * PR_SET_SECUREBITS unless necessary. */
911 if (prctl(PR_GET_SECUREBITS) != context->secure_bits)
912 if (prctl(PR_SET_SECUREBITS, context->secure_bits) < 0) {
917 if (context->capabilities)
918 if (cap_set_proc(context->capabilities) < 0) {
919 r = EXIT_CAPABILITIES;
924 if (!(our_env = new0(char*, 6))) {
930 if (asprintf(our_env + n_env++, "LISTEN_PID=%llu", (unsigned long long) getpid()) < 0 ||
931 asprintf(our_env + n_env++, "LISTEN_FDS=%u", n_fds) < 0) {
937 if (asprintf(our_env + n_env++, "HOME=%s", home) < 0) {
943 if (asprintf(our_env + n_env++, "LOGNAME=%s", username) < 0 ||
944 asprintf(our_env + n_env++, "USER=%s", username) < 0) {
949 if (!(final_env = strv_env_merge(environ, our_env, context->environment, NULL))) {
954 execve(command->path, command->argv, final_env);
959 strv_free(final_env);
961 if (saved_stdin >= 0)
962 close_nointr_nofail(saved_stdin);
964 if (saved_stdout >= 0)
965 close_nointr_nofail(saved_stdout);
970 /* We add the new process to the cgroup both in the child (so
971 * that we can be sure that no user code is ever executed
972 * outside of the cgroup) and in the parent (so that we can be
973 * sure that when we kill the cgroup the process will be
976 if ((r = cgroup_bonding_install_list(cgroup_bondings, pid)) < 0) {
981 log_debug("Forked %s as %llu", command->path, (unsigned long long) pid);
983 command->exec_status.pid = pid;
984 command->exec_status.start_timestamp = now(CLOCK_REALTIME);
990 void exec_context_init(ExecContext *c) {
995 c->oom_adjust_set = false;
998 c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 0);
999 c->ioprio_set = false;
1000 c->cpu_sched_policy = SCHED_OTHER;
1001 c->cpu_sched_priority = 0;
1002 c->cpu_sched_set = false;
1003 CPU_ZERO(&c->cpu_affinity);
1004 c->cpu_affinity_set = false;
1005 c->timer_slack_ns = 0;
1006 c->timer_slack_ns_set = false;
1008 c->cpu_sched_reset_on_fork = false;
1009 c->non_blocking = false;
1014 c->syslog_priority = LOG_DAEMON|LOG_INFO;
1017 c->capability_bounding_set_drop = 0;
1020 void exec_context_done(ExecContext *c) {
1025 strv_free(c->environment);
1026 c->environment = NULL;
1028 for (l = 0; l < ELEMENTSOF(c->rlimit); l++) {
1030 c->rlimit[l] = NULL;
1033 free(c->working_directory);
1034 c->working_directory = NULL;
1035 free(c->root_directory);
1036 c->root_directory = NULL;
1041 free(c->syslog_identifier);
1042 c->syslog_identifier = NULL;
1050 strv_free(c->supplementary_groups);
1051 c->supplementary_groups = NULL;
1053 if (c->capabilities) {
1054 cap_free(c->capabilities);
1055 c->capabilities = NULL;
1059 void exec_command_done(ExecCommand *c) {
1069 void exec_command_done_array(ExecCommand *c, unsigned n) {
1072 for (i = 0; i < n; i++)
1073 exec_command_done(c+i);
1076 void exec_command_free_list(ExecCommand *c) {
1080 LIST_REMOVE(ExecCommand, command, c, i);
1081 exec_command_done(i);
1086 void exec_command_free_array(ExecCommand **c, unsigned n) {
1089 for (i = 0; i < n; i++) {
1090 exec_command_free_list(c[i]);
1095 void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) {
1107 "%sWorkingDirectory: %s\n"
1108 "%sRootDirectory: %s\n"
1109 "%sNonBlocking: %s\n",
1111 prefix, c->working_directory ? c->working_directory : "/",
1112 prefix, c->root_directory ? c->root_directory : "/",
1113 prefix, yes_no(c->non_blocking));
1116 for (e = c->environment; *e; e++)
1117 fprintf(f, "%sEnvironment: %s\n", prefix, *e);
1124 if (c->oom_adjust_set)
1126 "%sOOMAdjust: %i\n",
1127 prefix, c->oom_adjust);
1129 for (i = 0; i < RLIM_NLIMITS; i++)
1131 fprintf(f, "%s%s: %llu\n", prefix, rlimit_to_string(i), (unsigned long long) c->rlimit[i]->rlim_max);
1135 "%sIOSchedulingClass: %s\n"
1136 "%sIOPriority: %i\n",
1137 prefix, ioprio_class_to_string(IOPRIO_PRIO_CLASS(c->ioprio)),
1138 prefix, (int) IOPRIO_PRIO_DATA(c->ioprio));
1140 if (c->cpu_sched_set)
1142 "%sCPUSchedulingPolicy: %s\n"
1143 "%sCPUSchedulingPriority: %i\n"
1144 "%sCPUSchedulingResetOnFork: %s\n",
1145 prefix, sched_policy_to_string(c->cpu_sched_policy),
1146 prefix, c->cpu_sched_priority,
1147 prefix, yes_no(c->cpu_sched_reset_on_fork));
1149 if (c->cpu_affinity_set) {
1150 fprintf(f, "%sCPUAffinity:", prefix);
1151 for (i = 0; i < CPU_SETSIZE; i++)
1152 if (CPU_ISSET(i, &c->cpu_affinity))
1153 fprintf(f, " %i", i);
1157 if (c->timer_slack_ns_set)
1158 fprintf(f, "%sTimerSlackNS: %lu\n", prefix, c->timer_slack_ns);
1161 "%sStandardInput: %s\n"
1162 "%sStandardOutput: %s\n"
1163 "%sStandardError: %s\n",
1164 prefix, exec_input_to_string(c->std_input),
1165 prefix, exec_output_to_string(c->std_output),
1166 prefix, exec_output_to_string(c->std_error));
1171 prefix, c->tty_path);
1173 if (c->std_output == EXEC_OUTPUT_SYSLOG || c->std_output == EXEC_OUTPUT_KERNEL ||
1174 c->std_error == EXEC_OUTPUT_SYSLOG || c->std_error == EXEC_OUTPUT_KERNEL)
1176 "%sSyslogFacility: %s\n"
1177 "%sSyslogLevel: %s\n",
1178 prefix, log_facility_to_string(LOG_FAC(c->syslog_priority)),
1179 prefix, log_level_to_string(LOG_PRI(c->syslog_priority)));
1181 if (c->capabilities) {
1183 if ((t = cap_to_text(c->capabilities, NULL))) {
1184 fprintf(f, "%sCapabilities: %s\n",
1191 fprintf(f, "%sSecure Bits:%s%s%s%s%s%s\n",
1193 (c->secure_bits & SECURE_KEEP_CAPS) ? " keep-caps" : "",
1194 (c->secure_bits & SECURE_KEEP_CAPS_LOCKED) ? " keep-caps-locked" : "",
1195 (c->secure_bits & SECURE_NO_SETUID_FIXUP) ? " no-setuid-fixup" : "",
1196 (c->secure_bits & SECURE_NO_SETUID_FIXUP_LOCKED) ? " no-setuid-fixup-locked" : "",
1197 (c->secure_bits & SECURE_NOROOT) ? " noroot" : "",
1198 (c->secure_bits & SECURE_NOROOT_LOCKED) ? "noroot-locked" : "");
1200 if (c->capability_bounding_set_drop) {
1201 fprintf(f, "%sCapabilityBoundingSetDrop:", prefix);
1203 for (i = 0; i <= CAP_LAST_CAP; i++)
1204 if (c->capability_bounding_set_drop & (1 << i)) {
1207 if ((t = cap_to_name(i))) {
1208 fprintf(f, " %s", t);
1217 fprintf(f, "%sUser: %s", prefix, c->user);
1219 fprintf(f, "%sGroup: %s", prefix, c->group);
1221 if (c->supplementary_groups) {
1224 fprintf(f, "%sSupplementaryGroups:", prefix);
1226 STRV_FOREACH(g, c->supplementary_groups)
1227 fprintf(f, " %s", *g);
1233 void exec_status_fill(ExecStatus *s, pid_t pid, int code, int status) {
1237 s->exit_timestamp = now(CLOCK_REALTIME);
1243 void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix) {
1244 char buf[FORMAT_TIMESTAMP_MAX];
1257 prefix, (unsigned long long) s->pid);
1259 if (s->start_timestamp > 0)
1261 "%sStart Timestamp: %s\n",
1262 prefix, format_timestamp(buf, sizeof(buf), s->start_timestamp));
1264 if (s->exit_timestamp > 0)
1266 "%sExit Timestamp: %s\n"
1268 "%sExit Status: %i\n",
1269 prefix, format_timestamp(buf, sizeof(buf), s->exit_timestamp),
1270 prefix, sigchld_code_to_string(s->code),
1274 char *exec_command_line(ExecCommand *c) {
1283 STRV_FOREACH(a, c->argv)
1286 if (!(n = new(char, k)))
1290 STRV_FOREACH(a, c->argv) {
1297 if (strpbrk(*a, WHITESPACE)) {
1308 /* FIXME: this doesn't really handle arguments that have
1309 * spaces and ticks in them */
1314 void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix) {
1316 const char *prefix2;
1325 p2 = strappend(prefix, "\t");
1326 prefix2 = p2 ? p2 : prefix;
1328 cmd = exec_command_line(c);
1331 "%sCommand Line: %s\n",
1332 prefix, cmd ? cmd : strerror(ENOMEM));
1336 exec_status_dump(&c->exec_status, f, prefix2);
1341 void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix) {
1347 LIST_FOREACH(command, c, c)
1348 exec_command_dump(c, f, prefix);
1351 void exec_command_append_list(ExecCommand **l, ExecCommand *e) {
1358 /* It's kinda important that we keep the order here */
1359 LIST_FIND_TAIL(ExecCommand, command, *l, end);
1360 LIST_INSERT_AFTER(ExecCommand, command, *l, end, e);
1365 int exec_command_set(ExecCommand *c, const char *path, ...) {
1373 l = strv_new_ap(path, ap);
1379 if (!(p = strdup(path))) {
1393 const char* exit_status_to_string(ExitStatus status) {
1395 /* We cast to int here, so that -Wenum doesn't complain that
1396 * EXIT_SUCCESS/EXIT_FAILURE aren't in the enum */
1398 switch ((int) status) {
1406 case EXIT_INVALIDARGUMENT:
1407 return "INVALIDARGUMENT";
1409 case EXIT_NOTIMPLEMENTED:
1410 return "NOTIMPLEMENTED";
1412 case EXIT_NOPERMISSION:
1413 return "NOPERMISSION";
1415 case EXIT_NOTINSTALLED:
1416 return "NOTINSSTALLED";
1418 case EXIT_NOTCONFIGURED:
1419 return "NOTCONFIGURED";
1421 case EXIT_NOTRUNNING:
1422 return "NOTRUNNING";
1442 case EXIT_OOM_ADJUST:
1443 return "OOM_ADJUST";
1445 case EXIT_SIGNAL_MASK:
1446 return "SIGNAL_MASK";
1460 case EXIT_TIMERSLACK:
1461 return "TIMERSLACK";
1463 case EXIT_SECUREBITS:
1464 return "SECUREBITS";
1466 case EXIT_SETSCHEDULER:
1467 return "SETSCHEDULER";
1469 case EXIT_CPUAFFINITY:
1470 return "CPUAFFINITY";
1478 case EXIT_CAPABILITIES:
1479 return "CAPABILITIES";
1498 static const char* const exec_input_table[_EXEC_INPUT_MAX] = {
1499 [EXEC_INPUT_NULL] = "null",
1500 [EXEC_INPUT_TTY] = "tty",
1501 [EXEC_INPUT_TTY_FORCE] = "tty-force",
1502 [EXEC_INPUT_TTY_FAIL] = "tty-fail"
1505 static const char* const exec_output_table[_EXEC_OUTPUT_MAX] = {
1506 [EXEC_OUTPUT_INHERIT] = "inherit",
1507 [EXEC_OUTPUT_NULL] = "null",
1508 [EXEC_OUTPUT_TTY] = "tty",
1509 [EXEC_OUTPUT_SYSLOG] = "syslog",
1510 [EXEC_OUTPUT_KERNEL] = "kernel"
1513 DEFINE_STRING_TABLE_LOOKUP(exec_output, ExecOutput);
1515 DEFINE_STRING_TABLE_LOOKUP(exec_input, ExecInput);