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"
51 /* This assumes there is a 'tty' group */
54 static int shift_fds(int fds[], unsigned n_fds) {
55 int start, restart_from;
60 /* Modifies the fds array! (sorts it) */
70 for (i = start; i < (int) n_fds; i++) {
73 /* Already at right index? */
77 if ((nfd = fcntl(fds[i], F_DUPFD, i+3)) < 0)
80 close_nointr_nofail(fds[i]);
83 /* Hmm, the fd we wanted isn't free? Then
84 * let's remember that and try again from here*/
85 if (nfd != i+3 && restart_from < 0)
98 static int flags_fds(const int fds[], unsigned n_fds, bool nonblock) {
107 /* Drops/Sets O_NONBLOCK and FD_CLOEXEC from the file flags */
109 for (i = 0; i < n_fds; i++) {
111 if ((r = fd_nonblock(fds[i], nonblock)) < 0)
114 /* We unconditionally drop FD_CLOEXEC from the fds,
115 * since after all we want to pass these fds to our
118 if ((r = fd_cloexec(fds[i], false)) < 0)
125 static const char *tty_path(const ExecContext *context) {
128 if (context->tty_path)
129 return context->tty_path;
131 return "/dev/console";
134 static int open_null_as(int flags, int nfd) {
139 if ((fd = open("/dev/null", flags|O_NOCTTY)) < 0)
143 r = dup2(fd, nfd) < 0 ? -errno : nfd;
144 close_nointr_nofail(fd);
151 static int connect_logger_as(const ExecContext *context, ExecOutput output, const char *ident, int nfd) {
155 struct sockaddr_un un;
159 assert(output < _EXEC_OUTPUT_MAX);
163 if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0)
167 sa.sa.sa_family = AF_UNIX;
168 strncpy(sa.un.sun_path+1, LOGGER_SOCKET, sizeof(sa.un.sun_path)-1);
170 if (connect(fd, &sa.sa, sizeof(sa)) < 0) {
171 close_nointr_nofail(fd);
175 if (shutdown(fd, SHUT_RD) < 0) {
176 close_nointr_nofail(fd);
180 /* We speak a very simple protocol between log server
181 * and client: one line for the log destination (kmsg
182 * or syslog), followed by the priority field,
183 * followed by the process name. Since we replaced
184 * stdin/stderr we simple use stdio to write to
185 * it. Note that we use stderr, to minimize buffer
186 * flushing issues. */
193 output == EXEC_OUTPUT_KMSG ? "kmsg" : "syslog",
194 context->syslog_priority,
195 context->syslog_identifier ? context->syslog_identifier : ident,
196 !context->syslog_no_prefix);
199 r = dup2(fd, nfd) < 0 ? -errno : nfd;
200 close_nointr_nofail(fd);
206 static int open_terminal_as(const char *path, mode_t mode, int nfd) {
212 if ((fd = open_terminal(path, mode | O_NOCTTY)) < 0)
216 r = dup2(fd, nfd) < 0 ? -errno : nfd;
217 close_nointr_nofail(fd);
224 static bool is_terminal_input(ExecInput i) {
226 i == EXEC_INPUT_TTY ||
227 i == EXEC_INPUT_TTY_FORCE ||
228 i == EXEC_INPUT_TTY_FAIL;
231 static int fixup_input(ExecInput std_input, int socket_fd) {
233 if (std_input == EXEC_INPUT_SOCKET && socket_fd < 0)
234 return EXEC_INPUT_NULL;
239 static int fixup_output(ExecOutput std_output, int socket_fd) {
241 if (std_output == EXEC_OUTPUT_SOCKET && socket_fd < 0)
242 return EXEC_OUTPUT_INHERIT;
247 static int setup_input(const ExecContext *context, int socket_fd) {
252 i = fixup_input(context->std_input, socket_fd);
256 case EXEC_INPUT_NULL:
257 return open_null_as(O_RDONLY, STDIN_FILENO);
260 case EXEC_INPUT_TTY_FORCE:
261 case EXEC_INPUT_TTY_FAIL: {
264 if ((fd = acquire_terminal(
266 i == EXEC_INPUT_TTY_FAIL,
267 i == EXEC_INPUT_TTY_FORCE,
271 if (fd != STDIN_FILENO) {
272 r = dup2(fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO;
273 close_nointr_nofail(fd);
280 case EXEC_INPUT_SOCKET:
281 return dup2(socket_fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO;
284 assert_not_reached("Unknown input type");
288 static int setup_output(const ExecContext *context, int socket_fd, const char *ident) {
295 i = fixup_input(context->std_input, socket_fd);
296 o = fixup_output(context->std_output, socket_fd);
298 /* This expects the input is already set up */
302 case EXEC_OUTPUT_INHERIT:
304 /* If the input is connected to a terminal, inherit that... */
305 if (i != EXEC_INPUT_NULL)
306 return dup2(STDIN_FILENO, STDOUT_FILENO) < 0 ? -errno : STDOUT_FILENO;
308 /* For PID 1 stdout is always connected to /dev/null,
309 * hence reopen the console if out parent is PID1. */
311 return open_terminal_as(tty_path(context), O_WRONLY, STDOUT_FILENO);
313 return STDOUT_FILENO;
315 case EXEC_OUTPUT_NULL:
316 return open_null_as(O_WRONLY, STDOUT_FILENO);
318 case EXEC_OUTPUT_TTY:
319 if (is_terminal_input(i))
320 return dup2(STDIN_FILENO, STDOUT_FILENO) < 0 ? -errno : STDOUT_FILENO;
322 /* We don't reset the terminal if this is just about output */
323 return open_terminal_as(tty_path(context), O_WRONLY, STDOUT_FILENO);
325 case EXEC_OUTPUT_SYSLOG:
326 case EXEC_OUTPUT_KMSG:
327 return connect_logger_as(context, o, ident, STDOUT_FILENO);
329 case EXEC_OUTPUT_SOCKET:
330 assert(socket_fd >= 0);
331 return dup2(socket_fd, STDOUT_FILENO) < 0 ? -errno : STDOUT_FILENO;
334 assert_not_reached("Unknown output type");
338 static int setup_error(const ExecContext *context, int socket_fd, const char *ident) {
345 i = fixup_input(context->std_input, socket_fd);
346 o = fixup_output(context->std_output, socket_fd);
347 e = fixup_output(context->std_error, socket_fd);
349 /* This expects the input and output are already set up */
351 /* Don't change the stderr file descriptor if we inherit all
352 * the way and are not on a tty */
353 if (e == EXEC_OUTPUT_INHERIT &&
354 o == EXEC_OUTPUT_INHERIT &&
355 i != EXEC_INPUT_NULL &&
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_KMSG:
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. */
394 (void) fchown(fd, uid, -1);
395 (void) 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,
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 /* We reset exactly these signals, since they are the
788 * only ones we set to SIG_IGN in the main daemon. All
789 * others we leave untouched because we set them to
790 * SIG_DFL or a valid handler initially, both of which
791 * will be demoted to SIG_DFL. */
792 default_signals(SIGNALS_CRASH_HANDLER,
795 if (sigemptyset(&ss) < 0 ||
796 sigprocmask(SIG_SETMASK, &ss, NULL) < 0) {
797 r = EXIT_SIGNAL_MASK;
801 if (!context->no_setsid)
807 if (socket_fd >= 0 && context->tcpwrap_name)
808 if (!socket_tcpwrap(socket_fd, context->tcpwrap_name)) {
816 /* Set up terminal for the question */
817 if ((r = setup_confirm_stdio(context,
818 &saved_stdin, &saved_stdout)))
821 /* Now ask the question. */
822 if (!(line = exec_command_line(argv))) {
827 r = ask(&response, "yns", "Execute %s? [Yes, No, Skip] ", line);
830 if (r < 0 || response == 'n') {
833 } else if (response == 's') {
838 /* Release terminal for the question */
839 if ((r = restore_confirm_stdio(context,
840 &saved_stdin, &saved_stdout,
841 &keep_stdin, &keep_stdout)))
846 if (setup_input(context, socket_fd) < 0) {
852 if (setup_output(context, socket_fd, file_name_from_path(command->path)) < 0) {
857 if (setup_error(context, socket_fd, file_name_from_path(command->path)) < 0) {
863 if ((r = cgroup_bonding_install_list(cgroup_bondings, 0)) < 0) {
868 if (context->oom_adjust_set) {
871 snprintf(t, sizeof(t), "%i", context->oom_adjust);
874 if (write_one_line_file("/proc/self/oom_adj", t) < 0) {
880 if (context->nice_set)
881 if (setpriority(PRIO_PROCESS, 0, context->nice) < 0) {
886 if (context->cpu_sched_set) {
887 struct sched_param param;
890 param.sched_priority = context->cpu_sched_priority;
892 if (sched_setscheduler(0, context->cpu_sched_policy |
893 (context->cpu_sched_reset_on_fork ? SCHED_RESET_ON_FORK : 0), ¶m) < 0) {
894 r = EXIT_SETSCHEDULER;
899 if (context->cpu_affinity_set)
900 if (sched_setaffinity(0, sizeof(context->cpu_affinity), &context->cpu_affinity) < 0) {
901 r = EXIT_CPUAFFINITY;
905 if (context->ioprio_set)
906 if (ioprio_set(IOPRIO_WHO_PROCESS, 0, context->ioprio) < 0) {
911 if (context->timer_slack_ns_set)
912 if (prctl(PR_SET_TIMERSLACK, context->timer_slack_ns_set) < 0) {
918 username = context->user;
919 if (get_user_creds(&username, &uid, &gid, &home) < 0) {
924 if (is_terminal_input(context->std_input))
925 if (chown_terminal(STDIN_FILENO, uid) < 0) {
931 if (apply_permissions)
932 if (enforce_groups(context, username, uid) < 0) {
937 umask(context->umask);
939 if (strv_length(context->read_write_dirs) > 0 ||
940 strv_length(context->read_only_dirs) > 0 ||
941 strv_length(context->inaccessible_dirs) > 0 ||
942 context->mount_flags != MS_SHARED ||
943 context->private_tmp)
944 if ((r = setup_namespace(
945 context->read_write_dirs,
946 context->read_only_dirs,
947 context->inaccessible_dirs,
948 context->private_tmp,
949 context->mount_flags)) < 0)
953 if (context->root_directory)
954 if (chroot(context->root_directory) < 0) {
959 if (chdir(context->working_directory ? context->working_directory : "/") < 0) {
967 if (asprintf(&d, "%s/%s",
968 context->root_directory ? context->root_directory : "",
969 context->working_directory ? context->working_directory : "") < 0) {
983 if (close_all_fds(fds, n_fds) < 0 ||
984 shift_fds(fds, n_fds) < 0 ||
985 flags_fds(fds, n_fds, context->non_blocking) < 0) {
990 if (apply_permissions) {
992 for (i = 0; i < RLIMIT_NLIMITS; i++) {
993 if (!context->rlimit[i])
996 if (setrlimit(i, context->rlimit[i]) < 0) {
1003 if (enforce_user(context, uid) < 0) {
1008 /* PR_GET_SECUREBITS is not priviliged, while
1009 * PR_SET_SECUREBITS is. So to suppress
1010 * potential EPERMs we'll try not to call
1011 * PR_SET_SECUREBITS unless necessary. */
1012 if (prctl(PR_GET_SECUREBITS) != context->secure_bits)
1013 if (prctl(PR_SET_SECUREBITS, context->secure_bits) < 0) {
1014 r = EXIT_SECUREBITS;
1018 if (context->capabilities)
1019 if (cap_set_proc(context->capabilities) < 0) {
1020 r = EXIT_CAPABILITIES;
1025 if (!(our_env = new0(char*, 6))) {
1031 if (asprintf(our_env + n_env++, "LISTEN_PID=%llu", (unsigned long long) getpid()) < 0 ||
1032 asprintf(our_env + n_env++, "LISTEN_FDS=%u", n_fds) < 0) {
1038 if (asprintf(our_env + n_env++, "HOME=%s", home) < 0) {
1044 if (asprintf(our_env + n_env++, "LOGNAME=%s", username) < 0 ||
1045 asprintf(our_env + n_env++, "USER=%s", username) < 0) {
1052 if (!(final_env = strv_env_merge(environment, our_env, context->environment, NULL))) {
1057 execve(command->path, argv, final_env);
1062 strv_free(final_env);
1064 if (saved_stdin >= 0)
1065 close_nointr_nofail(saved_stdin);
1067 if (saved_stdout >= 0)
1068 close_nointr_nofail(saved_stdout);
1073 /* We add the new process to the cgroup both in the child (so
1074 * that we can be sure that no user code is ever executed
1075 * outside of the cgroup) and in the parent (so that we can be
1076 * sure that when we kill the cgroup the process will be
1078 if (cgroup_bondings)
1079 cgroup_bonding_install_list(cgroup_bondings, pid);
1081 log_debug("Forked %s as %llu", command->path, (unsigned long long) pid);
1083 command->exec_status.pid = pid;
1084 command->exec_status.start_timestamp = now(CLOCK_REALTIME);
1090 void exec_context_init(ExecContext *c) {
1094 c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 0);
1095 c->cpu_sched_policy = SCHED_OTHER;
1096 c->syslog_priority = LOG_DAEMON|LOG_INFO;
1097 c->mount_flags = MS_SHARED;
1100 void exec_context_done(ExecContext *c) {
1105 strv_free(c->environment);
1106 c->environment = NULL;
1108 for (l = 0; l < ELEMENTSOF(c->rlimit); l++) {
1110 c->rlimit[l] = NULL;
1113 free(c->working_directory);
1114 c->working_directory = NULL;
1115 free(c->root_directory);
1116 c->root_directory = NULL;
1121 free(c->tcpwrap_name);
1122 c->tcpwrap_name = NULL;
1124 free(c->syslog_identifier);
1125 c->syslog_identifier = NULL;
1133 strv_free(c->supplementary_groups);
1134 c->supplementary_groups = NULL;
1136 if (c->capabilities) {
1137 cap_free(c->capabilities);
1138 c->capabilities = NULL;
1141 strv_free(c->read_only_dirs);
1142 c->read_only_dirs = NULL;
1144 strv_free(c->read_write_dirs);
1145 c->read_write_dirs = NULL;
1147 strv_free(c->inaccessible_dirs);
1148 c->inaccessible_dirs = NULL;
1151 void exec_command_done(ExecCommand *c) {
1161 void exec_command_done_array(ExecCommand *c, unsigned n) {
1164 for (i = 0; i < n; i++)
1165 exec_command_done(c+i);
1168 void exec_command_free_list(ExecCommand *c) {
1172 LIST_REMOVE(ExecCommand, command, c, i);
1173 exec_command_done(i);
1178 void exec_command_free_array(ExecCommand **c, unsigned n) {
1181 for (i = 0; i < n; i++) {
1182 exec_command_free_list(c[i]);
1187 static void strv_fprintf(FILE *f, char **l) {
1193 fprintf(f, " %s", *g);
1196 void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) {
1208 "%sWorkingDirectory: %s\n"
1209 "%sRootDirectory: %s\n"
1210 "%sNonBlocking: %s\n"
1211 "%sPrivateTmp: %s\n",
1213 prefix, c->working_directory ? c->working_directory : "/",
1214 prefix, c->root_directory ? c->root_directory : "/",
1215 prefix, yes_no(c->non_blocking),
1216 prefix, yes_no(c->private_tmp));
1219 for (e = c->environment; *e; e++)
1220 fprintf(f, "%sEnvironment: %s\n", prefix, *e);
1222 if (c->tcpwrap_name)
1224 "%sTCPWrapName: %s\n",
1225 prefix, c->tcpwrap_name);
1232 if (c->oom_adjust_set)
1234 "%sOOMAdjust: %i\n",
1235 prefix, c->oom_adjust);
1237 for (i = 0; i < RLIM_NLIMITS; i++)
1239 fprintf(f, "%s%s: %llu\n", prefix, rlimit_to_string(i), (unsigned long long) c->rlimit[i]->rlim_max);
1243 "%sIOSchedulingClass: %s\n"
1244 "%sIOPriority: %i\n",
1245 prefix, ioprio_class_to_string(IOPRIO_PRIO_CLASS(c->ioprio)),
1246 prefix, (int) IOPRIO_PRIO_DATA(c->ioprio));
1248 if (c->cpu_sched_set)
1250 "%sCPUSchedulingPolicy: %s\n"
1251 "%sCPUSchedulingPriority: %i\n"
1252 "%sCPUSchedulingResetOnFork: %s\n",
1253 prefix, sched_policy_to_string(c->cpu_sched_policy),
1254 prefix, c->cpu_sched_priority,
1255 prefix, yes_no(c->cpu_sched_reset_on_fork));
1257 if (c->cpu_affinity_set) {
1258 fprintf(f, "%sCPUAffinity:", prefix);
1259 for (i = 0; i < CPU_SETSIZE; i++)
1260 if (CPU_ISSET(i, &c->cpu_affinity))
1261 fprintf(f, " %i", i);
1265 if (c->timer_slack_ns_set)
1266 fprintf(f, "%sTimerSlackNS: %lu\n", prefix, c->timer_slack_ns);
1269 "%sStandardInput: %s\n"
1270 "%sStandardOutput: %s\n"
1271 "%sStandardError: %s\n",
1272 prefix, exec_input_to_string(c->std_input),
1273 prefix, exec_output_to_string(c->std_output),
1274 prefix, exec_output_to_string(c->std_error));
1279 prefix, c->tty_path);
1281 if (c->std_output == EXEC_OUTPUT_SYSLOG || c->std_output == EXEC_OUTPUT_KMSG ||
1282 c->std_error == EXEC_OUTPUT_SYSLOG || c->std_error == EXEC_OUTPUT_KMSG)
1284 "%sSyslogFacility: %s\n"
1285 "%sSyslogLevel: %s\n",
1286 prefix, log_facility_to_string(LOG_FAC(c->syslog_priority)),
1287 prefix, log_level_to_string(LOG_PRI(c->syslog_priority)));
1289 if (c->capabilities) {
1291 if ((t = cap_to_text(c->capabilities, NULL))) {
1292 fprintf(f, "%sCapabilities: %s\n",
1299 fprintf(f, "%sSecure Bits:%s%s%s%s%s%s\n",
1301 (c->secure_bits & SECURE_KEEP_CAPS) ? " keep-caps" : "",
1302 (c->secure_bits & SECURE_KEEP_CAPS_LOCKED) ? " keep-caps-locked" : "",
1303 (c->secure_bits & SECURE_NO_SETUID_FIXUP) ? " no-setuid-fixup" : "",
1304 (c->secure_bits & SECURE_NO_SETUID_FIXUP_LOCKED) ? " no-setuid-fixup-locked" : "",
1305 (c->secure_bits & SECURE_NOROOT) ? " noroot" : "",
1306 (c->secure_bits & SECURE_NOROOT_LOCKED) ? "noroot-locked" : "");
1308 if (c->capability_bounding_set_drop) {
1309 fprintf(f, "%sCapabilityBoundingSetDrop:", prefix);
1311 for (i = 0; i <= CAP_LAST_CAP; i++)
1312 if (c->capability_bounding_set_drop & (1 << i)) {
1315 if ((t = cap_to_name(i))) {
1316 fprintf(f, " %s", t);
1325 fprintf(f, "%sUser: %s", prefix, c->user);
1327 fprintf(f, "%sGroup: %s", prefix, c->group);
1329 if (strv_length(c->supplementary_groups) > 0) {
1330 fprintf(f, "%sSupplementaryGroups:", prefix);
1331 strv_fprintf(f, c->supplementary_groups);
1335 if (strv_length(c->read_write_dirs) > 0) {
1336 fprintf(f, "%sReadWriteDirs:", prefix);
1337 strv_fprintf(f, c->read_write_dirs);
1341 if (strv_length(c->read_only_dirs) > 0) {
1342 fprintf(f, "%sReadOnlyDirs:", prefix);
1343 strv_fprintf(f, c->read_only_dirs);
1347 if (strv_length(c->inaccessible_dirs) > 0) {
1348 fprintf(f, "%sInaccessibleDirs:", prefix);
1349 strv_fprintf(f, c->inaccessible_dirs);
1354 void exec_status_fill(ExecStatus *s, pid_t pid, int code, int status) {
1358 s->exit_timestamp = now(CLOCK_REALTIME);
1364 void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix) {
1365 char buf[FORMAT_TIMESTAMP_MAX];
1378 prefix, (unsigned long long) s->pid);
1380 if (s->start_timestamp > 0)
1382 "%sStart Timestamp: %s\n",
1383 prefix, format_timestamp(buf, sizeof(buf), s->start_timestamp));
1385 if (s->exit_timestamp > 0)
1387 "%sExit Timestamp: %s\n"
1389 "%sExit Status: %i\n",
1390 prefix, format_timestamp(buf, sizeof(buf), s->exit_timestamp),
1391 prefix, sigchld_code_to_string(s->code),
1395 char *exec_command_line(char **argv) {
1403 STRV_FOREACH(a, argv)
1406 if (!(n = new(char, k)))
1410 STRV_FOREACH(a, argv) {
1417 if (strpbrk(*a, WHITESPACE)) {
1428 /* FIXME: this doesn't really handle arguments that have
1429 * spaces and ticks in them */
1434 void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix) {
1436 const char *prefix2;
1445 p2 = strappend(prefix, "\t");
1446 prefix2 = p2 ? p2 : prefix;
1448 cmd = exec_command_line(c->argv);
1451 "%sCommand Line: %s\n",
1452 prefix, cmd ? cmd : strerror(ENOMEM));
1456 exec_status_dump(&c->exec_status, f, prefix2);
1461 void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix) {
1467 LIST_FOREACH(command, c, c)
1468 exec_command_dump(c, f, prefix);
1471 void exec_command_append_list(ExecCommand **l, ExecCommand *e) {
1478 /* It's kinda important that we keep the order here */
1479 LIST_FIND_TAIL(ExecCommand, command, *l, end);
1480 LIST_INSERT_AFTER(ExecCommand, command, *l, end, e);
1485 int exec_command_set(ExecCommand *c, const char *path, ...) {
1493 l = strv_new_ap(path, ap);
1499 if (!(p = strdup(path))) {
1513 const char* exit_status_to_string(ExitStatus status) {
1515 /* We cast to int here, so that -Wenum doesn't complain that
1516 * EXIT_SUCCESS/EXIT_FAILURE aren't in the enum */
1518 switch ((int) status) {
1526 case EXIT_INVALIDARGUMENT:
1527 return "INVALIDARGUMENT";
1529 case EXIT_NOTIMPLEMENTED:
1530 return "NOTIMPLEMENTED";
1532 case EXIT_NOPERMISSION:
1533 return "NOPERMISSION";
1535 case EXIT_NOTINSTALLED:
1536 return "NOTINSSTALLED";
1538 case EXIT_NOTCONFIGURED:
1539 return "NOTCONFIGURED";
1541 case EXIT_NOTRUNNING:
1542 return "NOTRUNNING";
1562 case EXIT_OOM_ADJUST:
1563 return "OOM_ADJUST";
1565 case EXIT_SIGNAL_MASK:
1566 return "SIGNAL_MASK";
1580 case EXIT_TIMERSLACK:
1581 return "TIMERSLACK";
1583 case EXIT_SECUREBITS:
1584 return "SECUREBITS";
1586 case EXIT_SETSCHEDULER:
1587 return "SETSCHEDULER";
1589 case EXIT_CPUAFFINITY:
1590 return "CPUAFFINITY";
1598 case EXIT_CAPABILITIES:
1599 return "CAPABILITIES";
1621 static const char* const exec_input_table[_EXEC_INPUT_MAX] = {
1622 [EXEC_INPUT_NULL] = "null",
1623 [EXEC_INPUT_TTY] = "tty",
1624 [EXEC_INPUT_TTY_FORCE] = "tty-force",
1625 [EXEC_INPUT_TTY_FAIL] = "tty-fail",
1626 [EXEC_INPUT_SOCKET] = "socket"
1629 static const char* const exec_output_table[_EXEC_OUTPUT_MAX] = {
1630 [EXEC_OUTPUT_INHERIT] = "inherit",
1631 [EXEC_OUTPUT_NULL] = "null",
1632 [EXEC_OUTPUT_TTY] = "tty",
1633 [EXEC_OUTPUT_SYSLOG] = "syslog",
1634 [EXEC_OUTPUT_KMSG] = "kmsg",
1635 [EXEC_OUTPUT_SOCKET] = "socket"
1638 DEFINE_STRING_TABLE_LOOKUP(exec_output, ExecOutput);
1640 DEFINE_STRING_TABLE_LOOKUP(exec_input, ExecInput);