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. */
192 output == EXEC_OUTPUT_KERNEL ? "kmsg" : "syslog",
193 context->syslog_priority,
194 context->syslog_identifier ? context->syslog_identifier : ident,
195 !context->syslog_no_prefix);
198 r = dup2(fd, nfd) < 0 ? -errno : nfd;
199 close_nointr_nofail(fd);
205 static int open_terminal_as(const char *path, mode_t mode, int nfd) {
211 if ((fd = open_terminal(path, mode | O_NOCTTY)) < 0)
215 r = dup2(fd, nfd) < 0 ? -errno : nfd;
216 close_nointr_nofail(fd);
223 static bool is_terminal_input(ExecInput i) {
225 i == EXEC_INPUT_TTY ||
226 i == EXEC_INPUT_TTY_FORCE ||
227 i == EXEC_INPUT_TTY_FAIL;
230 static int fixup_input(const ExecContext *context, int socket_fd) {
233 if (socket_fd < 0 && context->std_input == EXEC_INPUT_SOCKET)
234 return EXEC_INPUT_NULL;
236 return context->std_input;
239 static int fixup_output(const ExecContext *context, int socket_fd) {
242 if (socket_fd < 0 && context->std_output == EXEC_OUTPUT_SOCKET)
243 return EXEC_OUTPUT_INHERIT;
245 return context->std_output;
248 static int fixup_error(const ExecContext *context, int socket_fd) {
251 if (socket_fd < 0 && context->std_error == EXEC_OUTPUT_SOCKET)
252 return EXEC_OUTPUT_INHERIT;
254 return context->std_error;
257 static int setup_input(const ExecContext *context, int socket_fd) {
262 i = fixup_input(context, socket_fd);
266 case EXEC_INPUT_NULL:
267 return open_null_as(O_RDONLY, STDIN_FILENO);
270 case EXEC_INPUT_TTY_FORCE:
271 case EXEC_INPUT_TTY_FAIL: {
274 if ((fd = acquire_terminal(
276 i == EXEC_INPUT_TTY_FAIL,
277 i == EXEC_INPUT_TTY_FORCE,
281 if (fd != STDIN_FILENO) {
282 r = dup2(fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO;
283 close_nointr_nofail(fd);
290 case EXEC_INPUT_SOCKET:
291 return dup2(socket_fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO;
294 assert_not_reached("Unknown input type");
298 static int setup_output(const ExecContext *context, int socket_fd, const char *ident) {
305 i = fixup_input(context, socket_fd);
306 o = fixup_output(context, socket_fd);
308 /* This expects the input is already set up */
312 case EXEC_OUTPUT_INHERIT:
314 /* If the input is connected to a terminal, inherit that... */
315 if (is_terminal_input(i) || i == EXEC_INPUT_SOCKET)
316 return dup2(STDIN_FILENO, STDOUT_FILENO) < 0 ? -errno : STDOUT_FILENO;
320 case EXEC_OUTPUT_NULL:
321 return open_null_as(O_WRONLY, STDOUT_FILENO);
323 case EXEC_OUTPUT_TTY:
324 if (is_terminal_input(i))
325 return dup2(STDIN_FILENO, STDOUT_FILENO) < 0 ? -errno : STDOUT_FILENO;
327 /* We don't reset the terminal if this is just about output */
328 return open_terminal_as(tty_path(context), O_WRONLY, STDOUT_FILENO);
330 case EXEC_OUTPUT_SYSLOG:
331 case EXEC_OUTPUT_KERNEL:
332 return connect_logger_as(context, o, ident, STDOUT_FILENO);
334 case EXEC_OUTPUT_SOCKET:
335 assert(socket_fd >= 0);
336 return dup2(socket_fd, STDOUT_FILENO) < 0 ? -errno : STDOUT_FILENO;
339 assert_not_reached("Unknown output type");
343 static int setup_error(const ExecContext *context, int socket_fd, const char *ident) {
350 i = fixup_input(context, socket_fd);
351 o = fixup_output(context, socket_fd);
352 e = fixup_error(context, socket_fd);
354 /* This expects the input and output are already set up */
356 /* Don't change the stderr file descriptor if we inherit all
357 * the way and are not on a tty */
358 if (e == EXEC_OUTPUT_INHERIT &&
359 o == EXEC_OUTPUT_INHERIT &&
360 !is_terminal_input(i))
361 return STDERR_FILENO;
363 /* Duplicate form stdout if possible */
364 if (e == o || e == EXEC_OUTPUT_INHERIT)
365 return dup2(STDOUT_FILENO, STDERR_FILENO) < 0 ? -errno : STDERR_FILENO;
369 case EXEC_OUTPUT_NULL:
370 return open_null_as(O_WRONLY, STDERR_FILENO);
372 case EXEC_OUTPUT_TTY:
373 if (is_terminal_input(i))
374 return dup2(STDIN_FILENO, STDERR_FILENO) < 0 ? -errno : STDERR_FILENO;
376 /* We don't reset the terminal if this is just about output */
377 return open_terminal_as(tty_path(context), O_WRONLY, STDERR_FILENO);
379 case EXEC_OUTPUT_SYSLOG:
380 case EXEC_OUTPUT_KERNEL:
381 return connect_logger_as(context, e, ident, STDERR_FILENO);
383 case EXEC_OUTPUT_SOCKET:
384 assert(socket_fd >= 0);
385 return dup2(socket_fd, STDERR_FILENO) < 0 ? -errno : STDERR_FILENO;
388 assert_not_reached("Unknown error type");
392 static int chown_terminal(int fd, uid_t uid) {
397 /* This might fail. What matters are the results. */
398 (void) fchown(fd, uid, -1);
399 (void) fchmod(fd, TTY_MODE);
401 if (fstat(fd, &st) < 0)
404 if (st.st_uid != uid || (st.st_mode & 0777) != TTY_MODE)
410 static int setup_confirm_stdio(const ExecContext *context,
412 int *_saved_stdout) {
413 int fd = -1, saved_stdin, saved_stdout = -1, r;
416 assert(_saved_stdin);
417 assert(_saved_stdout);
419 /* This returns positive EXIT_xxx return values instead of
420 * negative errno style values! */
422 if ((saved_stdin = fcntl(STDIN_FILENO, F_DUPFD, 3)) < 0)
425 if ((saved_stdout = fcntl(STDOUT_FILENO, F_DUPFD, 3)) < 0) {
430 if ((fd = acquire_terminal(
432 context->std_input == EXEC_INPUT_TTY_FAIL,
433 context->std_input == EXEC_INPUT_TTY_FORCE,
439 if (chown_terminal(fd, getuid()) < 0) {
444 if (dup2(fd, STDIN_FILENO) < 0) {
449 if (dup2(fd, STDOUT_FILENO) < 0) {
455 close_nointr_nofail(fd);
457 *_saved_stdin = saved_stdin;
458 *_saved_stdout = saved_stdout;
463 if (saved_stdout >= 0)
464 close_nointr_nofail(saved_stdout);
466 if (saved_stdin >= 0)
467 close_nointr_nofail(saved_stdin);
470 close_nointr_nofail(fd);
475 static int restore_confirm_stdio(const ExecContext *context,
483 assert(*saved_stdin >= 0);
484 assert(saved_stdout);
485 assert(*saved_stdout >= 0);
487 /* This returns positive EXIT_xxx return values instead of
488 * negative errno style values! */
490 if (is_terminal_input(context->std_input)) {
492 /* The service wants terminal input. */
496 context->std_output == EXEC_OUTPUT_INHERIT ||
497 context->std_output == EXEC_OUTPUT_TTY;
500 /* If the service doesn't want a controlling terminal,
501 * then we need to get rid entirely of what we have
504 if (release_terminal() < 0)
507 if (dup2(*saved_stdin, STDIN_FILENO) < 0)
510 if (dup2(*saved_stdout, STDOUT_FILENO) < 0)
513 *keep_stdout = *keep_stdin = false;
519 static int get_group_creds(const char *groupname, gid_t *gid) {
526 /* We enforce some special rules for gid=0: in order to avoid
527 * NSS lookups for root we hardcode its data. */
529 if (streq(groupname, "root") || streq(groupname, "0")) {
534 if (safe_atolu(groupname, &lu) >= 0) {
536 g = getgrgid((gid_t) lu);
539 g = getgrnam(groupname);
543 return errno != 0 ? -errno : -ESRCH;
549 static int get_user_creds(const char **username, uid_t *uid, gid_t *gid, const char **home) {
559 /* We enforce some special rules for uid=0: in order to avoid
560 * NSS lookups for root we hardcode its data. */
562 if (streq(*username, "root") || streq(*username, "0")) {
570 if (safe_atolu(*username, &lu) >= 0) {
572 p = getpwuid((uid_t) lu);
574 /* If there are multiple users with the same id, make
575 * sure to leave $USER to the configured value instead
576 * of the first occurence in the database. However if
577 * the uid was configured by a numeric uid, then let's
578 * pick the real username from /etc/passwd. */
580 *username = p->pw_name;
583 p = getpwnam(*username);
587 return errno != 0 ? -errno : -ESRCH;
595 static int enforce_groups(const ExecContext *context, const char *username, gid_t gid) {
596 bool keep_groups = false;
601 /* Lookup and ser GID and supplementary group list. Here too
602 * we avoid NSS lookups for gid=0. */
604 if (context->group || username) {
607 if ((r = get_group_creds(context->group, &gid)) < 0)
610 /* First step, initialize groups from /etc/groups */
611 if (username && gid != 0) {
612 if (initgroups(username, gid) < 0)
618 /* Second step, set our gids */
619 if (setresgid(gid, gid, gid) < 0)
623 if (context->supplementary_groups) {
628 /* Final step, initialize any manually set supplementary groups */
629 ngroups_max = (int) sysconf(_SC_NGROUPS_MAX);
631 if (!(gids = new(gid_t, ngroups_max)))
635 if ((k = getgroups(ngroups_max, gids)) < 0) {
642 STRV_FOREACH(i, context->supplementary_groups) {
644 if (k >= ngroups_max) {
649 if ((r = get_group_creds(*i, gids+k)) < 0) {
657 if (setgroups(k, gids) < 0) {
668 static int enforce_user(const ExecContext *context, uid_t uid) {
672 /* Sets (but doesn't lookup) the uid and make sure we keep the
673 * capabilities while doing so. */
675 if (context->capabilities) {
677 static const cap_value_t bits[] = {
678 CAP_SETUID, /* Necessary so that we can run setresuid() below */
679 CAP_SETPCAP /* Necessary so that we can set PR_SET_SECUREBITS later on */
682 /* First step: If we need to keep capabilities but
683 * drop privileges we need to make sure we keep our
684 * caps, whiel we drop priviliges. */
686 int sb = context->secure_bits|SECURE_KEEP_CAPS;
688 if (prctl(PR_GET_SECUREBITS) != sb)
689 if (prctl(PR_SET_SECUREBITS, sb) < 0)
693 /* Second step: set the capabilites. This will reduce
694 * the capabilities to the minimum we need. */
696 if (!(d = cap_dup(context->capabilities)))
699 if (cap_set_flag(d, CAP_EFFECTIVE, ELEMENTSOF(bits), bits, CAP_SET) < 0 ||
700 cap_set_flag(d, CAP_PERMITTED, ELEMENTSOF(bits), bits, CAP_SET) < 0) {
706 if (cap_set_proc(d) < 0) {
715 /* Third step: actually set the uids */
716 if (setresuid(uid, uid, uid) < 0)
719 /* At this point we should have all necessary capabilities but
720 are otherwise a normal user. However, the caps might got
721 corrupted due to the setresuid() so we need clean them up
722 later. This is done outside of this call. */
727 int exec_spawn(ExecCommand *command,
729 const ExecContext *context,
730 int fds[], unsigned n_fds,
732 bool apply_permissions,
735 CGroupBonding *cgroup_bondings,
746 assert(fds || n_fds <= 0);
748 if (context->std_input == EXEC_INPUT_SOCKET ||
749 context->std_output == EXEC_OUTPUT_SOCKET ||
750 context->std_error == EXEC_OUTPUT_SOCKET) {
763 argv = command->argv;
765 if (!(line = exec_command_line(argv)))
768 log_debug("About to execute: %s", line);
772 if ((r = cgroup_bonding_realize_list(cgroup_bondings)))
775 if ((pid = fork()) < 0)
781 const char *username = NULL, *home = NULL;
782 uid_t uid = (uid_t) -1;
783 gid_t gid = (gid_t) -1;
784 char **our_env = NULL, **final_env = NULL;
786 int saved_stdout = -1, saved_stdin = -1;
787 bool keep_stdout = false, keep_stdin = false;
791 reset_all_signal_handlers();
793 if (sigemptyset(&ss) < 0 ||
794 sigprocmask(SIG_SETMASK, &ss, NULL) < 0) {
795 r = EXIT_SIGNAL_MASK;
799 if (!context->no_setsid)
808 /* Set up terminal for the question */
809 if ((r = setup_confirm_stdio(context,
810 &saved_stdin, &saved_stdout)))
813 /* Now ask the question. */
814 if (!(line = exec_command_line(argv))) {
819 r = ask(&response, "yns", "Execute %s? [Yes, No, Skip] ", line);
822 if (r < 0 || response == 'n') {
825 } else if (response == 's') {
830 /* Release terminal for the question */
831 if ((r = restore_confirm_stdio(context,
832 &saved_stdin, &saved_stdout,
833 &keep_stdin, &keep_stdout)))
838 if (setup_input(context, socket_fd) < 0) {
844 if (setup_output(context, socket_fd, file_name_from_path(command->path)) < 0) {
849 if (setup_error(context, socket_fd, file_name_from_path(command->path)) < 0) {
855 if ((r = cgroup_bonding_install_list(cgroup_bondings, 0)) < 0) {
860 if (context->oom_adjust_set) {
863 snprintf(t, sizeof(t), "%i", context->oom_adjust);
866 if (write_one_line_file("/proc/self/oom_adj", t) < 0) {
872 if (context->nice_set)
873 if (setpriority(PRIO_PROCESS, 0, context->nice) < 0) {
878 if (context->cpu_sched_set) {
879 struct sched_param param;
882 param.sched_priority = context->cpu_sched_priority;
884 if (sched_setscheduler(0, context->cpu_sched_policy |
885 (context->cpu_sched_reset_on_fork ? SCHED_RESET_ON_FORK : 0), ¶m) < 0) {
886 r = EXIT_SETSCHEDULER;
891 if (context->cpu_affinity_set)
892 if (sched_setaffinity(0, sizeof(context->cpu_affinity), &context->cpu_affinity) < 0) {
893 r = EXIT_CPUAFFINITY;
897 if (context->ioprio_set)
898 if (ioprio_set(IOPRIO_WHO_PROCESS, 0, context->ioprio) < 0) {
903 if (context->timer_slack_ns_set)
904 if (prctl(PR_SET_TIMERSLACK, context->timer_slack_ns_set) < 0) {
909 if (strv_length(context->read_write_dirs) > 0 ||
910 strv_length(context->read_only_dirs) > 0 ||
911 strv_length(context->inaccessible_dirs) > 0 ||
912 context->mount_flags != MS_SHARED ||
913 context->private_tmp)
914 if ((r = setup_namespace(
915 context->read_write_dirs,
916 context->read_only_dirs,
917 context->inaccessible_dirs,
918 context->private_tmp,
919 context->mount_flags)) < 0)
923 username = context->user;
924 if (get_user_creds(&username, &uid, &gid, &home) < 0) {
929 if (is_terminal_input(context->std_input))
930 if (chown_terminal(STDIN_FILENO, uid) < 0) {
936 if (apply_permissions)
937 if (enforce_groups(context, username, uid) < 0) {
942 umask(context->umask);
945 if (context->root_directory)
946 if (chroot(context->root_directory) < 0) {
951 if (chdir(context->working_directory ? context->working_directory : "/") < 0) {
959 if (asprintf(&d, "%s/%s",
960 context->root_directory ? context->root_directory : "",
961 context->working_directory ? context->working_directory : "") < 0) {
975 if (close_all_fds(fds, n_fds) < 0 ||
976 shift_fds(fds, n_fds) < 0 ||
977 flags_fds(fds, n_fds, context->non_blocking) < 0) {
982 if (apply_permissions) {
984 for (i = 0; i < RLIMIT_NLIMITS; i++) {
985 if (!context->rlimit[i])
988 if (setrlimit(i, context->rlimit[i]) < 0) {
995 if (enforce_user(context, uid) < 0) {
1000 /* PR_GET_SECUREBITS is not priviliged, while
1001 * PR_SET_SECUREBITS is. So to suppress
1002 * potential EPERMs we'll try not to call
1003 * PR_SET_SECUREBITS unless necessary. */
1004 if (prctl(PR_GET_SECUREBITS) != context->secure_bits)
1005 if (prctl(PR_SET_SECUREBITS, context->secure_bits) < 0) {
1006 r = EXIT_SECUREBITS;
1010 if (context->capabilities)
1011 if (cap_set_proc(context->capabilities) < 0) {
1012 r = EXIT_CAPABILITIES;
1017 if (!(our_env = new0(char*, 6))) {
1023 if (asprintf(our_env + n_env++, "LISTEN_PID=%llu", (unsigned long long) getpid()) < 0 ||
1024 asprintf(our_env + n_env++, "LISTEN_FDS=%u", n_fds) < 0) {
1030 if (asprintf(our_env + n_env++, "HOME=%s", home) < 0) {
1036 if (asprintf(our_env + n_env++, "LOGNAME=%s", username) < 0 ||
1037 asprintf(our_env + n_env++, "USER=%s", username) < 0) {
1044 if (!(final_env = strv_env_merge(environment, our_env, context->environment, NULL))) {
1049 execve(command->path, argv, final_env);
1054 strv_free(final_env);
1056 if (saved_stdin >= 0)
1057 close_nointr_nofail(saved_stdin);
1059 if (saved_stdout >= 0)
1060 close_nointr_nofail(saved_stdout);
1065 /* We add the new process to the cgroup both in the child (so
1066 * that we can be sure that no user code is ever executed
1067 * outside of the cgroup) and in the parent (so that we can be
1068 * sure that when we kill the cgroup the process will be
1070 if (cgroup_bondings)
1071 cgroup_bonding_install_list(cgroup_bondings, pid);
1073 log_debug("Forked %s as %llu", command->path, (unsigned long long) pid);
1075 command->exec_status.pid = pid;
1076 command->exec_status.start_timestamp = now(CLOCK_REALTIME);
1082 void exec_context_init(ExecContext *c) {
1086 c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 0);
1087 c->cpu_sched_policy = SCHED_OTHER;
1088 c->syslog_priority = LOG_DAEMON|LOG_INFO;
1089 c->mount_flags = MS_SHARED;
1092 void exec_context_done(ExecContext *c) {
1097 strv_free(c->environment);
1098 c->environment = NULL;
1100 for (l = 0; l < ELEMENTSOF(c->rlimit); l++) {
1102 c->rlimit[l] = NULL;
1105 free(c->working_directory);
1106 c->working_directory = NULL;
1107 free(c->root_directory);
1108 c->root_directory = NULL;
1113 free(c->syslog_identifier);
1114 c->syslog_identifier = NULL;
1122 strv_free(c->supplementary_groups);
1123 c->supplementary_groups = NULL;
1125 if (c->capabilities) {
1126 cap_free(c->capabilities);
1127 c->capabilities = NULL;
1130 strv_free(c->read_only_dirs);
1131 c->read_only_dirs = NULL;
1133 strv_free(c->read_write_dirs);
1134 c->read_write_dirs = NULL;
1136 strv_free(c->inaccessible_dirs);
1137 c->inaccessible_dirs = NULL;
1140 void exec_command_done(ExecCommand *c) {
1150 void exec_command_done_array(ExecCommand *c, unsigned n) {
1153 for (i = 0; i < n; i++)
1154 exec_command_done(c+i);
1157 void exec_command_free_list(ExecCommand *c) {
1161 LIST_REMOVE(ExecCommand, command, c, i);
1162 exec_command_done(i);
1167 void exec_command_free_array(ExecCommand **c, unsigned n) {
1170 for (i = 0; i < n; i++) {
1171 exec_command_free_list(c[i]);
1176 static void strv_fprintf(FILE *f, char **l) {
1182 fprintf(f, " %s", *g);
1185 void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) {
1197 "%sWorkingDirectory: %s\n"
1198 "%sRootDirectory: %s\n"
1199 "%sNonBlocking: %s\n"
1200 "%sPrivateTmp: %s\n",
1202 prefix, c->working_directory ? c->working_directory : "/",
1203 prefix, c->root_directory ? c->root_directory : "/",
1204 prefix, yes_no(c->non_blocking),
1205 prefix, yes_no(c->private_tmp));
1208 for (e = c->environment; *e; e++)
1209 fprintf(f, "%sEnvironment: %s\n", prefix, *e);
1216 if (c->oom_adjust_set)
1218 "%sOOMAdjust: %i\n",
1219 prefix, c->oom_adjust);
1221 for (i = 0; i < RLIM_NLIMITS; i++)
1223 fprintf(f, "%s%s: %llu\n", prefix, rlimit_to_string(i), (unsigned long long) c->rlimit[i]->rlim_max);
1227 "%sIOSchedulingClass: %s\n"
1228 "%sIOPriority: %i\n",
1229 prefix, ioprio_class_to_string(IOPRIO_PRIO_CLASS(c->ioprio)),
1230 prefix, (int) IOPRIO_PRIO_DATA(c->ioprio));
1232 if (c->cpu_sched_set)
1234 "%sCPUSchedulingPolicy: %s\n"
1235 "%sCPUSchedulingPriority: %i\n"
1236 "%sCPUSchedulingResetOnFork: %s\n",
1237 prefix, sched_policy_to_string(c->cpu_sched_policy),
1238 prefix, c->cpu_sched_priority,
1239 prefix, yes_no(c->cpu_sched_reset_on_fork));
1241 if (c->cpu_affinity_set) {
1242 fprintf(f, "%sCPUAffinity:", prefix);
1243 for (i = 0; i < CPU_SETSIZE; i++)
1244 if (CPU_ISSET(i, &c->cpu_affinity))
1245 fprintf(f, " %i", i);
1249 if (c->timer_slack_ns_set)
1250 fprintf(f, "%sTimerSlackNS: %lu\n", prefix, c->timer_slack_ns);
1253 "%sStandardInput: %s\n"
1254 "%sStandardOutput: %s\n"
1255 "%sStandardError: %s\n",
1256 prefix, exec_input_to_string(c->std_input),
1257 prefix, exec_output_to_string(c->std_output),
1258 prefix, exec_output_to_string(c->std_error));
1263 prefix, c->tty_path);
1265 if (c->std_output == EXEC_OUTPUT_SYSLOG || c->std_output == EXEC_OUTPUT_KERNEL ||
1266 c->std_error == EXEC_OUTPUT_SYSLOG || c->std_error == EXEC_OUTPUT_KERNEL)
1268 "%sSyslogFacility: %s\n"
1269 "%sSyslogLevel: %s\n",
1270 prefix, log_facility_to_string(LOG_FAC(c->syslog_priority)),
1271 prefix, log_level_to_string(LOG_PRI(c->syslog_priority)));
1273 if (c->capabilities) {
1275 if ((t = cap_to_text(c->capabilities, NULL))) {
1276 fprintf(f, "%sCapabilities: %s\n",
1283 fprintf(f, "%sSecure Bits:%s%s%s%s%s%s\n",
1285 (c->secure_bits & SECURE_KEEP_CAPS) ? " keep-caps" : "",
1286 (c->secure_bits & SECURE_KEEP_CAPS_LOCKED) ? " keep-caps-locked" : "",
1287 (c->secure_bits & SECURE_NO_SETUID_FIXUP) ? " no-setuid-fixup" : "",
1288 (c->secure_bits & SECURE_NO_SETUID_FIXUP_LOCKED) ? " no-setuid-fixup-locked" : "",
1289 (c->secure_bits & SECURE_NOROOT) ? " noroot" : "",
1290 (c->secure_bits & SECURE_NOROOT_LOCKED) ? "noroot-locked" : "");
1292 if (c->capability_bounding_set_drop) {
1293 fprintf(f, "%sCapabilityBoundingSetDrop:", prefix);
1295 for (i = 0; i <= CAP_LAST_CAP; i++)
1296 if (c->capability_bounding_set_drop & (1 << i)) {
1299 if ((t = cap_to_name(i))) {
1300 fprintf(f, " %s", t);
1309 fprintf(f, "%sUser: %s", prefix, c->user);
1311 fprintf(f, "%sGroup: %s", prefix, c->group);
1313 if (strv_length(c->supplementary_groups) > 0) {
1314 fprintf(f, "%sSupplementaryGroups:", prefix);
1315 strv_fprintf(f, c->supplementary_groups);
1319 if (strv_length(c->read_write_dirs) > 0) {
1320 fprintf(f, "%sReadWriteDirs:", prefix);
1321 strv_fprintf(f, c->read_write_dirs);
1325 if (strv_length(c->read_only_dirs) > 0) {
1326 fprintf(f, "%sReadOnlyDirs:", prefix);
1327 strv_fprintf(f, c->read_only_dirs);
1331 if (strv_length(c->inaccessible_dirs) > 0) {
1332 fprintf(f, "%sInaccessibleDirs:", prefix);
1333 strv_fprintf(f, c->inaccessible_dirs);
1338 void exec_status_fill(ExecStatus *s, pid_t pid, int code, int status) {
1342 s->exit_timestamp = now(CLOCK_REALTIME);
1348 void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix) {
1349 char buf[FORMAT_TIMESTAMP_MAX];
1362 prefix, (unsigned long long) s->pid);
1364 if (s->start_timestamp > 0)
1366 "%sStart Timestamp: %s\n",
1367 prefix, format_timestamp(buf, sizeof(buf), s->start_timestamp));
1369 if (s->exit_timestamp > 0)
1371 "%sExit Timestamp: %s\n"
1373 "%sExit Status: %i\n",
1374 prefix, format_timestamp(buf, sizeof(buf), s->exit_timestamp),
1375 prefix, sigchld_code_to_string(s->code),
1379 char *exec_command_line(char **argv) {
1387 STRV_FOREACH(a, argv)
1390 if (!(n = new(char, k)))
1394 STRV_FOREACH(a, argv) {
1401 if (strpbrk(*a, WHITESPACE)) {
1412 /* FIXME: this doesn't really handle arguments that have
1413 * spaces and ticks in them */
1418 void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix) {
1420 const char *prefix2;
1429 p2 = strappend(prefix, "\t");
1430 prefix2 = p2 ? p2 : prefix;
1432 cmd = exec_command_line(c->argv);
1435 "%sCommand Line: %s\n",
1436 prefix, cmd ? cmd : strerror(ENOMEM));
1440 exec_status_dump(&c->exec_status, f, prefix2);
1445 void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix) {
1451 LIST_FOREACH(command, c, c)
1452 exec_command_dump(c, f, prefix);
1455 void exec_command_append_list(ExecCommand **l, ExecCommand *e) {
1462 /* It's kinda important that we keep the order here */
1463 LIST_FIND_TAIL(ExecCommand, command, *l, end);
1464 LIST_INSERT_AFTER(ExecCommand, command, *l, end, e);
1469 int exec_command_set(ExecCommand *c, const char *path, ...) {
1477 l = strv_new_ap(path, ap);
1483 if (!(p = strdup(path))) {
1497 const char* exit_status_to_string(ExitStatus status) {
1499 /* We cast to int here, so that -Wenum doesn't complain that
1500 * EXIT_SUCCESS/EXIT_FAILURE aren't in the enum */
1502 switch ((int) status) {
1510 case EXIT_INVALIDARGUMENT:
1511 return "INVALIDARGUMENT";
1513 case EXIT_NOTIMPLEMENTED:
1514 return "NOTIMPLEMENTED";
1516 case EXIT_NOPERMISSION:
1517 return "NOPERMISSION";
1519 case EXIT_NOTINSTALLED:
1520 return "NOTINSSTALLED";
1522 case EXIT_NOTCONFIGURED:
1523 return "NOTCONFIGURED";
1525 case EXIT_NOTRUNNING:
1526 return "NOTRUNNING";
1546 case EXIT_OOM_ADJUST:
1547 return "OOM_ADJUST";
1549 case EXIT_SIGNAL_MASK:
1550 return "SIGNAL_MASK";
1564 case EXIT_TIMERSLACK:
1565 return "TIMERSLACK";
1567 case EXIT_SECUREBITS:
1568 return "SECUREBITS";
1570 case EXIT_SETSCHEDULER:
1571 return "SETSCHEDULER";
1573 case EXIT_CPUAFFINITY:
1574 return "CPUAFFINITY";
1582 case EXIT_CAPABILITIES:
1583 return "CAPABILITIES";
1602 static const char* const exec_input_table[_EXEC_INPUT_MAX] = {
1603 [EXEC_INPUT_NULL] = "null",
1604 [EXEC_INPUT_TTY] = "tty",
1605 [EXEC_INPUT_TTY_FORCE] = "tty-force",
1606 [EXEC_INPUT_TTY_FAIL] = "tty-fail",
1607 [EXEC_INPUT_SOCKET] = "socket"
1610 static const char* const exec_output_table[_EXEC_OUTPUT_MAX] = {
1611 [EXEC_OUTPUT_INHERIT] = "inherit",
1612 [EXEC_OUTPUT_NULL] = "null",
1613 [EXEC_OUTPUT_TTY] = "tty",
1614 [EXEC_OUTPUT_SYSLOG] = "syslog",
1615 [EXEC_OUTPUT_KERNEL] = "kernel",
1616 [EXEC_OUTPUT_SOCKET] = "socket"
1619 DEFINE_STRING_TABLE_LOOKUP(exec_output, ExecOutput);
1621 DEFINE_STRING_TABLE_LOOKUP(exec_input, ExecInput);