1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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 Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser 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>
39 #include <linux/oom.h>
41 #include <linux/seccomp-bpf.h>
47 #include <security/pam_appl.h>
53 #include "capability.h"
56 #include "sd-messages.h"
58 #include "securebits.h"
59 #include "namespace.h"
61 #include "exit-status.h"
63 #include "utmp-wtmp.h"
65 #include "path-util.h"
66 #include "syscall-list.h"
72 #define IDLE_TIMEOUT_USEC (5*USEC_PER_SEC)
73 #define IDLE_TIMEOUT2_USEC (1*USEC_PER_SEC)
75 /* This assumes there is a 'tty' group */
78 #define SNDBUF_SIZE (8*1024*1024)
80 static int shift_fds(int fds[], unsigned n_fds) {
81 int start, restart_from;
86 /* Modifies the fds array! (sorts it) */
96 for (i = start; i < (int) n_fds; i++) {
99 /* Already at right index? */
103 if ((nfd = fcntl(fds[i], F_DUPFD, i+3)) < 0)
106 close_nointr_nofail(fds[i]);
109 /* Hmm, the fd we wanted isn't free? Then
110 * let's remember that and try again from here*/
111 if (nfd != i+3 && restart_from < 0)
115 if (restart_from < 0)
118 start = restart_from;
124 static int flags_fds(const int fds[], unsigned n_fds, bool nonblock) {
133 /* Drops/Sets O_NONBLOCK and FD_CLOEXEC from the file flags */
135 for (i = 0; i < n_fds; i++) {
137 if ((r = fd_nonblock(fds[i], nonblock)) < 0)
140 /* We unconditionally drop FD_CLOEXEC from the fds,
141 * since after all we want to pass these fds to our
144 if ((r = fd_cloexec(fds[i], false)) < 0)
151 _pure_ static const char *tty_path(const ExecContext *context) {
154 if (context->tty_path)
155 return context->tty_path;
157 return "/dev/console";
160 static void exec_context_tty_reset(const ExecContext *context) {
163 if (context->tty_vhangup)
164 terminal_vhangup(tty_path(context));
166 if (context->tty_reset)
167 reset_terminal(tty_path(context));
169 if (context->tty_vt_disallocate && context->tty_path)
170 vt_disallocate(context->tty_path);
173 static bool is_terminal_output(ExecOutput o) {
175 o == EXEC_OUTPUT_TTY ||
176 o == EXEC_OUTPUT_SYSLOG_AND_CONSOLE ||
177 o == EXEC_OUTPUT_KMSG_AND_CONSOLE ||
178 o == EXEC_OUTPUT_JOURNAL_AND_CONSOLE;
181 static int open_null_as(int flags, int nfd) {
186 fd = open("/dev/null", flags|O_NOCTTY);
191 r = dup2(fd, nfd) < 0 ? -errno : nfd;
192 close_nointr_nofail(fd);
199 static int connect_logger_as(const ExecContext *context, ExecOutput output, const char *ident, const char *unit_id, int nfd) {
201 union sockaddr_union sa = {
202 .un.sun_family = AF_UNIX,
203 .un.sun_path = "/run/systemd/journal/stdout",
207 assert(output < _EXEC_OUTPUT_MAX);
211 fd = socket(AF_UNIX, SOCK_STREAM, 0);
215 r = connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path));
217 close_nointr_nofail(fd);
221 if (shutdown(fd, SHUT_RD) < 0) {
222 close_nointr_nofail(fd);
226 fd_inc_sndbuf(fd, SNDBUF_SIZE);
236 context->syslog_identifier ? context->syslog_identifier : ident,
238 context->syslog_priority,
239 !!context->syslog_level_prefix,
240 output == EXEC_OUTPUT_SYSLOG || output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE,
241 output == EXEC_OUTPUT_KMSG || output == EXEC_OUTPUT_KMSG_AND_CONSOLE,
242 is_terminal_output(output));
245 r = dup2(fd, nfd) < 0 ? -errno : nfd;
246 close_nointr_nofail(fd);
252 static int open_terminal_as(const char *path, mode_t mode, int nfd) {
258 if ((fd = open_terminal(path, mode | O_NOCTTY)) < 0)
262 r = dup2(fd, nfd) < 0 ? -errno : nfd;
263 close_nointr_nofail(fd);
270 static bool is_terminal_input(ExecInput i) {
272 i == EXEC_INPUT_TTY ||
273 i == EXEC_INPUT_TTY_FORCE ||
274 i == EXEC_INPUT_TTY_FAIL;
277 static int fixup_input(ExecInput std_input, int socket_fd, bool apply_tty_stdin) {
279 if (is_terminal_input(std_input) && !apply_tty_stdin)
280 return EXEC_INPUT_NULL;
282 if (std_input == EXEC_INPUT_SOCKET && socket_fd < 0)
283 return EXEC_INPUT_NULL;
288 static int fixup_output(ExecOutput std_output, int socket_fd) {
290 if (std_output == EXEC_OUTPUT_SOCKET && socket_fd < 0)
291 return EXEC_OUTPUT_INHERIT;
296 static int setup_input(const ExecContext *context, int socket_fd, bool apply_tty_stdin) {
301 i = fixup_input(context->std_input, socket_fd, apply_tty_stdin);
305 case EXEC_INPUT_NULL:
306 return open_null_as(O_RDONLY, STDIN_FILENO);
309 case EXEC_INPUT_TTY_FORCE:
310 case EXEC_INPUT_TTY_FAIL: {
313 fd = acquire_terminal(tty_path(context),
314 i == EXEC_INPUT_TTY_FAIL,
315 i == EXEC_INPUT_TTY_FORCE,
321 if (fd != STDIN_FILENO) {
322 r = dup2(fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO;
323 close_nointr_nofail(fd);
330 case EXEC_INPUT_SOCKET:
331 return dup2(socket_fd, STDIN_FILENO) < 0 ? -errno : STDIN_FILENO;
334 assert_not_reached("Unknown input type");
338 static int setup_output(const ExecContext *context, int fileno, int socket_fd, const char *ident, const char *unit_id, bool apply_tty_stdin) {
346 i = fixup_input(context->std_input, socket_fd, apply_tty_stdin);
347 o = fixup_output(context->std_output, socket_fd);
349 if (fileno == STDERR_FILENO) {
351 e = fixup_output(context->std_error, socket_fd);
353 /* This expects the input and output are already set up */
355 /* Don't change the stderr file descriptor if we inherit all
356 * the way and are not on a tty */
357 if (e == EXEC_OUTPUT_INHERIT &&
358 o == EXEC_OUTPUT_INHERIT &&
359 i == EXEC_INPUT_NULL &&
360 !is_terminal_input(context->std_input) &&
364 /* Duplicate from stdout if possible */
365 if (e == o || e == EXEC_OUTPUT_INHERIT)
366 return dup2(STDOUT_FILENO, fileno) < 0 ? -errno : fileno;
370 } else if (o == EXEC_OUTPUT_INHERIT) {
371 /* If input got downgraded, inherit the original value */
372 if (i == EXEC_INPUT_NULL && is_terminal_input(context->std_input))
373 return open_terminal_as(tty_path(context), O_WRONLY, fileno);
375 /* If the input is connected to anything that's not a /dev/null, inherit that... */
376 if (i != EXEC_INPUT_NULL)
377 return dup2(STDIN_FILENO, fileno) < 0 ? -errno : fileno;
379 /* If we are not started from PID 1 we just inherit STDOUT from our parent process. */
383 /* We need to open /dev/null here anew, to get the right access mode. */
384 return open_null_as(O_WRONLY, fileno);
389 case EXEC_OUTPUT_NULL:
390 return open_null_as(O_WRONLY, fileno);
392 case EXEC_OUTPUT_TTY:
393 if (is_terminal_input(i))
394 return dup2(STDIN_FILENO, fileno) < 0 ? -errno : fileno;
396 /* We don't reset the terminal if this is just about output */
397 return open_terminal_as(tty_path(context), O_WRONLY, fileno);
399 case EXEC_OUTPUT_SYSLOG:
400 case EXEC_OUTPUT_SYSLOG_AND_CONSOLE:
401 case EXEC_OUTPUT_KMSG:
402 case EXEC_OUTPUT_KMSG_AND_CONSOLE:
403 case EXEC_OUTPUT_JOURNAL:
404 case EXEC_OUTPUT_JOURNAL_AND_CONSOLE:
405 r = connect_logger_as(context, o, ident, unit_id, fileno);
407 log_struct_unit(LOG_CRIT, unit_id,
408 "MESSAGE=Failed to connect std%s of %s to the journal socket: %s",
409 fileno == STDOUT_FILENO ? "out" : "err",
410 unit_id, strerror(-r),
413 r = open_null_as(O_WRONLY, fileno);
417 case EXEC_OUTPUT_SOCKET:
418 assert(socket_fd >= 0);
419 return dup2(socket_fd, fileno) < 0 ? -errno : fileno;
422 assert_not_reached("Unknown error type");
426 static int chown_terminal(int fd, uid_t uid) {
431 /* This might fail. What matters are the results. */
432 (void) fchown(fd, uid, -1);
433 (void) fchmod(fd, TTY_MODE);
435 if (fstat(fd, &st) < 0)
438 if (st.st_uid != uid || (st.st_mode & 0777) != TTY_MODE)
444 static int setup_confirm_stdio(int *_saved_stdin,
445 int *_saved_stdout) {
446 int fd = -1, saved_stdin, saved_stdout = -1, r;
448 assert(_saved_stdin);
449 assert(_saved_stdout);
451 saved_stdin = fcntl(STDIN_FILENO, F_DUPFD, 3);
455 saved_stdout = fcntl(STDOUT_FILENO, F_DUPFD, 3);
456 if (saved_stdout < 0) {
461 fd = acquire_terminal(
466 DEFAULT_CONFIRM_USEC);
472 r = chown_terminal(fd, getuid());
476 if (dup2(fd, STDIN_FILENO) < 0) {
481 if (dup2(fd, STDOUT_FILENO) < 0) {
487 close_nointr_nofail(fd);
489 *_saved_stdin = saved_stdin;
490 *_saved_stdout = saved_stdout;
495 if (saved_stdout >= 0)
496 close_nointr_nofail(saved_stdout);
498 if (saved_stdin >= 0)
499 close_nointr_nofail(saved_stdin);
502 close_nointr_nofail(fd);
507 _printf_(1, 2) static int write_confirm_message(const char *format, ...) {
513 fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
517 va_start(ap, format);
518 vdprintf(fd, format, ap);
521 close_nointr_nofail(fd);
526 static int restore_confirm_stdio(int *saved_stdin,
532 assert(saved_stdout);
536 if (*saved_stdin >= 0)
537 if (dup2(*saved_stdin, STDIN_FILENO) < 0)
540 if (*saved_stdout >= 0)
541 if (dup2(*saved_stdout, STDOUT_FILENO) < 0)
544 if (*saved_stdin >= 0)
545 close_nointr_nofail(*saved_stdin);
547 if (*saved_stdout >= 0)
548 close_nointr_nofail(*saved_stdout);
553 static int ask_for_confirmation(char *response, char **argv) {
554 int saved_stdout = -1, saved_stdin = -1, r;
557 r = setup_confirm_stdio(&saved_stdin, &saved_stdout);
561 line = exec_command_line(argv);
565 r = ask(response, "yns", "Execute %s? [Yes, No, Skip] ", line);
568 restore_confirm_stdio(&saved_stdin, &saved_stdout);
573 static int enforce_groups(const ExecContext *context, const char *username, gid_t gid) {
574 bool keep_groups = false;
579 /* Lookup and set GID and supplementary group list. Here too
580 * we avoid NSS lookups for gid=0. */
582 if (context->group || username) {
584 if (context->group) {
585 const char *g = context->group;
587 if ((r = get_group_creds(&g, &gid)) < 0)
591 /* First step, initialize groups from /etc/groups */
592 if (username && gid != 0) {
593 if (initgroups(username, gid) < 0)
599 /* Second step, set our gids */
600 if (setresgid(gid, gid, gid) < 0)
604 if (context->supplementary_groups) {
609 /* Final step, initialize any manually set supplementary groups */
610 assert_se((ngroups_max = (int) sysconf(_SC_NGROUPS_MAX)) > 0);
612 if (!(gids = new(gid_t, ngroups_max)))
616 if ((k = getgroups(ngroups_max, gids)) < 0) {
623 STRV_FOREACH(i, context->supplementary_groups) {
626 if (k >= ngroups_max) {
632 r = get_group_creds(&g, gids+k);
641 if (setgroups(k, gids) < 0) {
652 static int enforce_user(const ExecContext *context, uid_t uid) {
656 /* Sets (but doesn't lookup) the uid and make sure we keep the
657 * capabilities while doing so. */
659 if (context->capabilities) {
661 static const cap_value_t bits[] = {
662 CAP_SETUID, /* Necessary so that we can run setresuid() below */
663 CAP_SETPCAP /* Necessary so that we can set PR_SET_SECUREBITS later on */
666 /* First step: If we need to keep capabilities but
667 * drop privileges we need to make sure we keep our
668 * caps, while we drop privileges. */
670 int sb = context->secure_bits | 1<<SECURE_KEEP_CAPS;
672 if (prctl(PR_GET_SECUREBITS) != sb)
673 if (prctl(PR_SET_SECUREBITS, sb) < 0)
677 /* Second step: set the capabilities. This will reduce
678 * the capabilities to the minimum we need. */
680 if (!(d = cap_dup(context->capabilities)))
683 if (cap_set_flag(d, CAP_EFFECTIVE, ELEMENTSOF(bits), bits, CAP_SET) < 0 ||
684 cap_set_flag(d, CAP_PERMITTED, ELEMENTSOF(bits), bits, CAP_SET) < 0) {
690 if (cap_set_proc(d) < 0) {
699 /* Third step: actually set the uids */
700 if (setresuid(uid, uid, uid) < 0)
703 /* At this point we should have all necessary capabilities but
704 are otherwise a normal user. However, the caps might got
705 corrupted due to the setresuid() so we need clean them up
706 later. This is done outside of this call. */
713 static int null_conv(
715 const struct pam_message **msg,
716 struct pam_response **resp,
719 /* We don't support conversations */
724 static int setup_pam(
730 int fds[], unsigned n_fds) {
732 static const struct pam_conv conv = {
737 pam_handle_t *handle = NULL;
739 int pam_code = PAM_SUCCESS;
742 bool close_session = false;
743 pid_t pam_pid = 0, parent_pid;
750 /* We set up PAM in the parent process, then fork. The child
751 * will then stay around until killed via PR_GET_PDEATHSIG or
752 * systemd via the cgroup logic. It will then remove the PAM
753 * session again. The parent process will exec() the actual
754 * daemon. We do things this way to ensure that the main PID
755 * of the daemon is the one we initially fork()ed. */
757 if (log_get_max_level() < LOG_PRI(LOG_DEBUG))
760 pam_code = pam_start(name, user, &conv, &handle);
761 if (pam_code != PAM_SUCCESS) {
767 pam_code = pam_set_item(handle, PAM_TTY, tty);
768 if (pam_code != PAM_SUCCESS)
772 pam_code = pam_acct_mgmt(handle, flags);
773 if (pam_code != PAM_SUCCESS)
776 pam_code = pam_open_session(handle, flags);
777 if (pam_code != PAM_SUCCESS)
780 close_session = true;
782 e = pam_getenvlist(handle);
784 pam_code = PAM_BUF_ERR;
788 /* Block SIGTERM, so that we know that it won't get lost in
790 if (sigemptyset(&ss) < 0 ||
791 sigaddset(&ss, SIGTERM) < 0 ||
792 sigprocmask(SIG_BLOCK, &ss, &old_ss) < 0)
795 parent_pid = getpid();
805 /* The child's job is to reset the PAM session on
808 /* This string must fit in 10 chars (i.e. the length
809 * of "/sbin/init"), to look pretty in /bin/ps */
810 rename_process("(sd-pam)");
812 /* Make sure we don't keep open the passed fds in this
813 child. We assume that otherwise only those fds are
814 open here that have been opened by PAM. */
815 close_many(fds, n_fds);
817 /* Drop privileges - we don't need any to pam_close_session
818 * and this will make PR_SET_PDEATHSIG work in most cases.
819 * If this fails, ignore the error - but expect sd-pam threads
820 * to fail to exit normally */
821 if (setresuid(uid, uid, uid) < 0)
822 log_error("Error: Failed to setresuid() in sd-pam: %s", strerror(-r));
824 /* Wait until our parent died. This will only work if
825 * the above setresuid() succeeds, otherwise the kernel
826 * will not allow unprivileged parents kill their privileged
827 * children this way. We rely on the control groups kill logic
828 * to do the rest for us. */
829 if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0)
832 /* Check if our parent process might already have
834 if (getppid() == parent_pid) {
836 if (sigwait(&ss, &sig) < 0) {
843 assert(sig == SIGTERM);
848 /* If our parent died we'll end the session */
849 if (getppid() != parent_pid) {
850 pam_code = pam_close_session(handle, flags);
851 if (pam_code != PAM_SUCCESS)
858 pam_end(handle, pam_code | flags);
862 /* If the child was forked off successfully it will do all the
863 * cleanups, so forget about the handle here. */
866 /* Unblock SIGTERM again in the parent */
867 if (sigprocmask(SIG_SETMASK, &old_ss, NULL) < 0)
870 /* We close the log explicitly here, since the PAM modules
871 * might have opened it, but we don't want this fd around. */
880 if (pam_code != PAM_SUCCESS) {
881 log_error("PAM failed: %s", pam_strerror(handle, pam_code));
882 err = -EPERM; /* PAM errors do not map to errno */
884 log_error("PAM failed: %m");
890 pam_code = pam_close_session(handle, flags);
892 pam_end(handle, pam_code | flags);
900 kill(pam_pid, SIGTERM);
901 kill(pam_pid, SIGCONT);
908 static void rename_process_from_path(const char *path) {
909 char process_name[11];
913 /* This resulting string must fit in 10 chars (i.e. the length
914 * of "/sbin/init") to look pretty in /bin/ps */
918 rename_process("(...)");
924 /* The end of the process name is usually more
925 * interesting, since the first bit might just be
931 process_name[0] = '(';
932 memcpy(process_name+1, p, l);
933 process_name[1+l] = ')';
934 process_name[1+l+1] = 0;
936 rename_process(process_name);
939 static int apply_seccomp(uint32_t *syscall_filter) {
940 static const struct sock_filter header[] = {
941 VALIDATE_ARCHITECTURE,
944 static const struct sock_filter footer[] = {
950 struct sock_filter *f;
951 struct sock_fprog prog = {};
953 assert(syscall_filter);
955 /* First: count the syscalls to check for */
956 for (i = 0, n = 0; i < syscall_max(); i++)
957 if (syscall_filter[i >> 4] & (1 << (i & 31)))
960 /* Second: build the filter program from a header the syscall
961 * matches and the footer */
962 f = alloca(sizeof(struct sock_filter) * (ELEMENTSOF(header) + 2*n + ELEMENTSOF(footer)));
963 memcpy(f, header, sizeof(header));
965 for (i = 0, n = 0; i < syscall_max(); i++)
966 if (syscall_filter[i >> 4] & (1 << (i & 31))) {
967 struct sock_filter item[] = {
968 BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, INDEX_TO_SYSCALL(i), 0, 1),
969 BPF_STMT(BPF_RET+BPF_K, SECCOMP_RET_ALLOW)
972 assert_cc(ELEMENTSOF(item) == 2);
974 f[ELEMENTSOF(header) + 2*n] = item[0];
975 f[ELEMENTSOF(header) + 2*n+1] = item[1];
980 memcpy(f + (ELEMENTSOF(header) + 2*n), footer, sizeof(footer));
982 /* Third: install the filter */
983 prog.len = ELEMENTSOF(header) + ELEMENTSOF(footer) + 2*n;
985 if (prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, &prog) < 0)
991 static void do_idle_pipe_dance(int idle_pipe[4]) {
994 if (idle_pipe[1] >= 0)
995 close_nointr_nofail(idle_pipe[1]);
996 if (idle_pipe[2] >= 0)
997 close_nointr_nofail(idle_pipe[2]);
999 if (idle_pipe[0] >= 0) {
1002 r = fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT_USEC);
1004 if (idle_pipe[3] >= 0 && r == 0 /* timeout */) {
1005 /* Signal systemd that we are bored and want to continue. */
1006 write(idle_pipe[3], "x", 1);
1008 /* Wait for systemd to react to the signal above. */
1009 fd_wait_for_event(idle_pipe[0], POLLHUP, IDLE_TIMEOUT2_USEC);
1012 close_nointr_nofail(idle_pipe[0]);
1016 if (idle_pipe[3] >= 0)
1017 close_nointr_nofail(idle_pipe[3]);
1020 int exec_spawn(ExecCommand *command,
1022 ExecContext *context,
1023 int fds[], unsigned n_fds,
1025 bool apply_permissions,
1027 bool apply_tty_stdin,
1029 CGroupControllerMask cgroup_supported,
1030 const char *cgroup_path,
1031 const char *unit_id,
1033 ExecRuntime *runtime,
1036 _cleanup_strv_free_ char **files_env = NULL;
1045 assert(fds || n_fds <= 0);
1047 if (context->std_input == EXEC_INPUT_SOCKET ||
1048 context->std_output == EXEC_OUTPUT_SOCKET ||
1049 context->std_error == EXEC_OUTPUT_SOCKET) {
1061 r = exec_context_load_environment(context, &files_env);
1063 log_struct_unit(LOG_ERR,
1065 "MESSAGE=Failed to load environment files: %s", strerror(-r),
1072 argv = command->argv;
1074 line = exec_command_line(argv);
1078 log_struct_unit(LOG_DEBUG,
1080 "EXECUTABLE=%s", command->path,
1081 "MESSAGE=About to execute: %s", line,
1090 _cleanup_strv_free_ char **our_env = NULL, **pam_env = NULL, **final_env = NULL, **final_argv = NULL;
1091 const char *username = NULL, *home = NULL, *shell = NULL;
1092 unsigned n_dont_close = 0, n_env = 0;
1093 int dont_close[n_fds + 3];
1094 uid_t uid = (uid_t) -1;
1095 gid_t gid = (gid_t) -1;
1101 rename_process_from_path(command->path);
1103 /* We reset exactly these signals, since they are the
1104 * only ones we set to SIG_IGN in the main daemon. All
1105 * others we leave untouched because we set them to
1106 * SIG_DFL or a valid handler initially, both of which
1107 * will be demoted to SIG_DFL. */
1108 default_signals(SIGNALS_CRASH_HANDLER,
1109 SIGNALS_IGNORE, -1);
1111 if (context->ignore_sigpipe)
1112 ignore_signals(SIGPIPE, -1);
1114 assert_se(sigemptyset(&ss) == 0);
1115 if (sigprocmask(SIG_SETMASK, &ss, NULL) < 0) {
1117 r = EXIT_SIGNAL_MASK;
1122 do_idle_pipe_dance(idle_pipe);
1124 /* Close sockets very early to make sure we don't
1125 * block init reexecution because it cannot bind its
1130 dont_close[n_dont_close++] = socket_fd;
1132 memcpy(dont_close + n_dont_close, fds, sizeof(int) * n_fds);
1133 n_dont_close += n_fds;
1136 if (runtime->netns_storage_socket[0] >= 0)
1137 dont_close[n_dont_close++] = runtime->netns_storage_socket[0];
1138 if (runtime->netns_storage_socket[1] >= 0)
1139 dont_close[n_dont_close++] = runtime->netns_storage_socket[1];
1142 err = close_all_fds(dont_close, n_dont_close);
1148 if (!context->same_pgrp)
1155 if (context->tcpwrap_name) {
1157 if (!socket_tcpwrap(socket_fd, context->tcpwrap_name)) {
1163 for (i = 0; i < (int) n_fds; i++) {
1164 if (!socket_tcpwrap(fds[i], context->tcpwrap_name)) {
1172 exec_context_tty_reset(context);
1174 if (confirm_spawn) {
1177 err = ask_for_confirmation(&response, argv);
1178 if (err == -ETIMEDOUT)
1179 write_confirm_message("Confirmation question timed out, assuming positive response.\n");
1181 write_confirm_message("Couldn't ask confirmation question, assuming positive response: %s\n", strerror(-err));
1182 else if (response == 's') {
1183 write_confirm_message("Skipping execution.\n");
1187 } else if (response == 'n') {
1188 write_confirm_message("Failing execution.\n");
1194 /* If a socket is connected to STDIN/STDOUT/STDERR, we
1195 * must sure to drop O_NONBLOCK */
1197 fd_nonblock(socket_fd, false);
1199 err = setup_input(context, socket_fd, apply_tty_stdin);
1205 err = setup_output(context, STDOUT_FILENO, socket_fd, basename(command->path), unit_id, apply_tty_stdin);
1211 err = setup_output(context, STDERR_FILENO, socket_fd, basename(command->path), unit_id, apply_tty_stdin);
1218 err = cg_attach_everywhere(cgroup_supported, cgroup_path, 0);
1225 if (context->oom_score_adjust_set) {
1228 snprintf(t, sizeof(t), "%i", context->oom_score_adjust);
1231 if (write_string_file("/proc/self/oom_score_adj", t) < 0) {
1233 r = EXIT_OOM_ADJUST;
1238 if (context->nice_set)
1239 if (setpriority(PRIO_PROCESS, 0, context->nice) < 0) {
1245 if (context->cpu_sched_set) {
1246 struct sched_param param = {
1247 .sched_priority = context->cpu_sched_priority,
1250 r = sched_setscheduler(0,
1251 context->cpu_sched_policy |
1252 (context->cpu_sched_reset_on_fork ?
1253 SCHED_RESET_ON_FORK : 0),
1257 r = EXIT_SETSCHEDULER;
1262 if (context->cpuset)
1263 if (sched_setaffinity(0, CPU_ALLOC_SIZE(context->cpuset_ncpus), context->cpuset) < 0) {
1265 r = EXIT_CPUAFFINITY;
1269 if (context->ioprio_set)
1270 if (ioprio_set(IOPRIO_WHO_PROCESS, 0, context->ioprio) < 0) {
1276 if (context->timer_slack_nsec != (nsec_t) -1)
1277 if (prctl(PR_SET_TIMERSLACK, context->timer_slack_nsec) < 0) {
1279 r = EXIT_TIMERSLACK;
1283 if (context->utmp_id)
1284 utmp_put_init_process(context->utmp_id, getpid(), getsid(0), context->tty_path);
1286 if (context->user) {
1287 username = context->user;
1288 err = get_user_creds(&username, &uid, &gid, &home, &shell);
1294 if (is_terminal_input(context->std_input)) {
1295 err = chown_terminal(STDIN_FILENO, uid);
1304 if (cgroup_path && context->user && context->pam_name) {
1305 err = cg_set_task_access(SYSTEMD_CGROUP_CONTROLLER, cgroup_path, 0644, uid, gid);
1312 err = cg_set_group_access(SYSTEMD_CGROUP_CONTROLLER, cgroup_path, 0755, uid, gid);
1320 if (apply_permissions) {
1321 err = enforce_groups(context, username, gid);
1328 umask(context->umask);
1331 if (apply_permissions && context->pam_name && username) {
1332 err = setup_pam(context->pam_name, username, uid, context->tty_path, &pam_env, fds, n_fds);
1339 if (context->private_network && runtime && runtime->netns_storage_socket[0] >= 0) {
1340 err = setup_netns(runtime->netns_storage_socket);
1347 if (!strv_isempty(context->read_write_dirs) ||
1348 !strv_isempty(context->read_only_dirs) ||
1349 !strv_isempty(context->inaccessible_dirs) ||
1350 context->mount_flags != 0 ||
1351 (context->private_tmp && runtime && (runtime->tmp_dir || runtime->var_tmp_dir))) {
1353 char *tmp = NULL, *var = NULL;
1355 /* The runtime struct only contains the parent
1356 * of the private /tmp, which is
1357 * non-accessible to world users. Inside of it
1358 * there's a /tmp that is sticky, and that's
1359 * the one we want to use here. */
1361 if (context->private_tmp && runtime) {
1362 if (runtime->tmp_dir)
1363 tmp = strappenda(runtime->tmp_dir, "/tmp");
1364 if (runtime->var_tmp_dir)
1365 var = strappenda(runtime->var_tmp_dir, "/tmp");
1368 err = setup_namespace(
1369 context->read_write_dirs,
1370 context->read_only_dirs,
1371 context->inaccessible_dirs,
1374 context->mount_flags);
1383 if (context->root_directory)
1384 if (chroot(context->root_directory) < 0) {
1390 if (chdir(context->working_directory ? context->working_directory : "/") < 0) {
1396 _cleanup_free_ char *d = NULL;
1398 if (asprintf(&d, "%s/%s",
1399 context->root_directory ? context->root_directory : "",
1400 context->working_directory ? context->working_directory : "") < 0) {
1413 /* We repeat the fd closing here, to make sure that
1414 * nothing is leaked from the PAM modules */
1415 err = close_all_fds(fds, n_fds);
1417 err = shift_fds(fds, n_fds);
1419 err = flags_fds(fds, n_fds, context->non_blocking);
1425 if (apply_permissions) {
1427 for (i = 0; i < RLIMIT_NLIMITS; i++) {
1428 if (!context->rlimit[i])
1431 if (setrlimit_closest(i, context->rlimit[i]) < 0) {
1438 if (context->capability_bounding_set_drop) {
1439 err = capability_bounding_set_drop(context->capability_bounding_set_drop, false);
1441 r = EXIT_CAPABILITIES;
1446 if (context->user) {
1447 err = enforce_user(context, uid);
1454 /* PR_GET_SECUREBITS is not privileged, while
1455 * PR_SET_SECUREBITS is. So to suppress
1456 * potential EPERMs we'll try not to call
1457 * PR_SET_SECUREBITS unless necessary. */
1458 if (prctl(PR_GET_SECUREBITS) != context->secure_bits)
1459 if (prctl(PR_SET_SECUREBITS, context->secure_bits) < 0) {
1461 r = EXIT_SECUREBITS;
1465 if (context->capabilities)
1466 if (cap_set_proc(context->capabilities) < 0) {
1468 r = EXIT_CAPABILITIES;
1472 if (context->no_new_privileges)
1473 if (prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0) < 0) {
1475 r = EXIT_NO_NEW_PRIVILEGES;
1479 if (context->syscall_filter) {
1480 err = apply_seccomp(context->syscall_filter);
1488 our_env = new(char*, 8);
1491 asprintf(our_env + n_env++, "LISTEN_PID=%lu", (unsigned long) getpid()) < 0 ||
1492 asprintf(our_env + n_env++, "LISTEN_FDS=%u", n_fds) < 0)) ||
1493 (home && asprintf(our_env + n_env++, "HOME=%s", home) < 0) ||
1495 asprintf(our_env + n_env++, "LOGNAME=%s", username) < 0 ||
1496 asprintf(our_env + n_env++, "USER=%s", username) < 0)) ||
1497 (shell && asprintf(our_env + n_env++, "SHELL=%s", shell) < 0) ||
1498 ((is_terminal_input(context->std_input) ||
1499 context->std_output == EXEC_OUTPUT_TTY ||
1500 context->std_error == EXEC_OUTPUT_TTY) && (
1501 !(our_env[n_env++] = strdup(default_term_for_tty(tty_path(context))))))) {
1508 our_env[n_env++] = NULL;
1511 final_env = strv_env_merge(5,
1514 context->environment,
1524 final_argv = replace_env_argv(argv, final_env);
1531 final_env = strv_env_clean(final_env);
1533 if (_unlikely_(log_get_max_level() >= LOG_PRI(LOG_DEBUG))) {
1534 line = exec_command_line(final_argv);
1537 log_struct_unit(LOG_DEBUG,
1539 "EXECUTABLE=%s", command->path,
1540 "MESSAGE=Executing: %s", line,
1547 execve(command->path, final_argv, final_env);
1554 log_struct(LOG_ERR, MESSAGE_ID(SD_MESSAGE_SPAWN_FAILED),
1555 "EXECUTABLE=%s", command->path,
1556 "MESSAGE=Failed at step %s spawning %s: %s",
1557 exit_status_to_string(r, EXIT_STATUS_SYSTEMD),
1558 command->path, strerror(-err),
1567 log_struct_unit(LOG_DEBUG,
1569 "MESSAGE=Forked %s as %lu",
1570 command->path, (unsigned long) pid,
1573 /* We add the new process to the cgroup both in the child (so
1574 * that we can be sure that no user code is ever executed
1575 * outside of the cgroup) and in the parent (so that we can be
1576 * sure that when we kill the cgroup the process will be
1579 cg_attach(SYSTEMD_CGROUP_CONTROLLER, cgroup_path, pid);
1581 exec_status_start(&command->exec_status, pid);
1587 void exec_context_init(ExecContext *c) {
1591 c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 0);
1592 c->cpu_sched_policy = SCHED_OTHER;
1593 c->syslog_priority = LOG_DAEMON|LOG_INFO;
1594 c->syslog_level_prefix = true;
1595 c->ignore_sigpipe = true;
1596 c->timer_slack_nsec = (nsec_t) -1;
1599 void exec_context_done(ExecContext *c) {
1604 strv_free(c->environment);
1605 c->environment = NULL;
1607 strv_free(c->environment_files);
1608 c->environment_files = NULL;
1610 for (l = 0; l < ELEMENTSOF(c->rlimit); l++) {
1612 c->rlimit[l] = NULL;
1615 free(c->working_directory);
1616 c->working_directory = NULL;
1617 free(c->root_directory);
1618 c->root_directory = NULL;
1623 free(c->tcpwrap_name);
1624 c->tcpwrap_name = NULL;
1626 free(c->syslog_identifier);
1627 c->syslog_identifier = NULL;
1635 strv_free(c->supplementary_groups);
1636 c->supplementary_groups = NULL;
1641 if (c->capabilities) {
1642 cap_free(c->capabilities);
1643 c->capabilities = NULL;
1646 strv_free(c->read_only_dirs);
1647 c->read_only_dirs = NULL;
1649 strv_free(c->read_write_dirs);
1650 c->read_write_dirs = NULL;
1652 strv_free(c->inaccessible_dirs);
1653 c->inaccessible_dirs = NULL;
1656 CPU_FREE(c->cpuset);
1661 free(c->syscall_filter);
1662 c->syscall_filter = NULL;
1665 void exec_command_done(ExecCommand *c) {
1675 void exec_command_done_array(ExecCommand *c, unsigned n) {
1678 for (i = 0; i < n; i++)
1679 exec_command_done(c+i);
1682 void exec_command_free_list(ExecCommand *c) {
1686 LIST_REMOVE(command, c, i);
1687 exec_command_done(i);
1692 void exec_command_free_array(ExecCommand **c, unsigned n) {
1695 for (i = 0; i < n; i++) {
1696 exec_command_free_list(c[i]);
1701 int exec_context_load_environment(const ExecContext *c, char ***l) {
1702 char **i, **r = NULL;
1707 STRV_FOREACH(i, c->environment_files) {
1710 bool ignore = false;
1712 _cleanup_globfree_ glob_t pglob = {};
1722 if (!path_is_absolute(fn)) {
1730 /* Filename supports globbing, take all matching files */
1732 if (glob(fn, 0, NULL, &pglob) != 0) {
1737 return errno ? -errno : -EINVAL;
1739 count = pglob.gl_pathc;
1747 for (n = 0; n < count; n++) {
1748 k = load_env_file(pglob.gl_pathv[n], NULL, &p);
1756 /* Log invalid environment variables with filename */
1758 p = strv_env_clean_log(p, pglob.gl_pathv[n]);
1765 m = strv_env_merge(2, r, p);
1781 static bool tty_may_match_dev_console(const char *tty) {
1782 char *active = NULL, *console;
1785 if (startswith(tty, "/dev/"))
1788 /* trivial identity? */
1789 if (streq(tty, "console"))
1792 console = resolve_dev_console(&active);
1793 /* if we could not resolve, assume it may */
1797 /* "tty0" means the active VC, so it may be the same sometimes */
1798 b = streq(console, tty) || (streq(console, "tty0") && tty_is_vc(tty));
1804 bool exec_context_may_touch_console(ExecContext *ec) {
1805 return (ec->tty_reset || ec->tty_vhangup || ec->tty_vt_disallocate ||
1806 is_terminal_input(ec->std_input) ||
1807 is_terminal_output(ec->std_output) ||
1808 is_terminal_output(ec->std_error)) &&
1809 tty_may_match_dev_console(tty_path(ec));
1812 static void strv_fprintf(FILE *f, char **l) {
1818 fprintf(f, " %s", *g);
1821 void exec_context_dump(ExecContext *c, FILE* f, const char *prefix) {
1828 prefix = strempty(prefix);
1832 "%sWorkingDirectory: %s\n"
1833 "%sRootDirectory: %s\n"
1834 "%sNonBlocking: %s\n"
1835 "%sPrivateTmp: %s\n"
1836 "%sPrivateNetwork: %s\n"
1837 "%sIgnoreSIGPIPE: %s\n",
1839 prefix, c->working_directory ? c->working_directory : "/",
1840 prefix, c->root_directory ? c->root_directory : "/",
1841 prefix, yes_no(c->non_blocking),
1842 prefix, yes_no(c->private_tmp),
1843 prefix, yes_no(c->private_network),
1844 prefix, yes_no(c->ignore_sigpipe));
1846 STRV_FOREACH(e, c->environment)
1847 fprintf(f, "%sEnvironment: %s\n", prefix, *e);
1849 STRV_FOREACH(e, c->environment_files)
1850 fprintf(f, "%sEnvironmentFile: %s\n", prefix, *e);
1852 if (c->tcpwrap_name)
1854 "%sTCPWrapName: %s\n",
1855 prefix, c->tcpwrap_name);
1862 if (c->oom_score_adjust_set)
1864 "%sOOMScoreAdjust: %i\n",
1865 prefix, c->oom_score_adjust);
1867 for (i = 0; i < RLIM_NLIMITS; i++)
1869 fprintf(f, "%s%s: %llu\n", prefix, rlimit_to_string(i), (unsigned long long) c->rlimit[i]->rlim_max);
1871 if (c->ioprio_set) {
1875 r = ioprio_class_to_string_alloc(IOPRIO_PRIO_CLASS(c->ioprio), &class_str);
1879 "%sIOSchedulingClass: %s\n"
1880 "%sIOPriority: %i\n",
1881 prefix, strna(class_str),
1882 prefix, (int) IOPRIO_PRIO_DATA(c->ioprio));
1886 if (c->cpu_sched_set) {
1890 r = sched_policy_to_string_alloc(c->cpu_sched_policy, &policy_str);
1894 "%sCPUSchedulingPolicy: %s\n"
1895 "%sCPUSchedulingPriority: %i\n"
1896 "%sCPUSchedulingResetOnFork: %s\n",
1897 prefix, strna(policy_str),
1898 prefix, c->cpu_sched_priority,
1899 prefix, yes_no(c->cpu_sched_reset_on_fork));
1904 fprintf(f, "%sCPUAffinity:", prefix);
1905 for (i = 0; i < c->cpuset_ncpus; i++)
1906 if (CPU_ISSET_S(i, CPU_ALLOC_SIZE(c->cpuset_ncpus), c->cpuset))
1907 fprintf(f, " %i", i);
1911 if (c->timer_slack_nsec != (nsec_t) -1)
1912 fprintf(f, "%sTimerSlackNSec: %lu\n", prefix, (unsigned long)c->timer_slack_nsec);
1915 "%sStandardInput: %s\n"
1916 "%sStandardOutput: %s\n"
1917 "%sStandardError: %s\n",
1918 prefix, exec_input_to_string(c->std_input),
1919 prefix, exec_output_to_string(c->std_output),
1920 prefix, exec_output_to_string(c->std_error));
1926 "%sTTYVHangup: %s\n"
1927 "%sTTYVTDisallocate: %s\n",
1928 prefix, c->tty_path,
1929 prefix, yes_no(c->tty_reset),
1930 prefix, yes_no(c->tty_vhangup),
1931 prefix, yes_no(c->tty_vt_disallocate));
1933 if (c->std_output == EXEC_OUTPUT_SYSLOG || c->std_output == EXEC_OUTPUT_KMSG || c->std_output == EXEC_OUTPUT_JOURNAL ||
1934 c->std_output == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || c->std_output == EXEC_OUTPUT_KMSG_AND_CONSOLE || c->std_output == EXEC_OUTPUT_JOURNAL_AND_CONSOLE ||
1935 c->std_error == EXEC_OUTPUT_SYSLOG || c->std_error == EXEC_OUTPUT_KMSG || c->std_error == EXEC_OUTPUT_JOURNAL ||
1936 c->std_error == EXEC_OUTPUT_SYSLOG_AND_CONSOLE || c->std_error == EXEC_OUTPUT_KMSG_AND_CONSOLE || c->std_error == EXEC_OUTPUT_JOURNAL_AND_CONSOLE) {
1937 char *fac_str, *lvl_str;
1940 r = log_facility_unshifted_to_string_alloc(c->syslog_priority >> 3, &fac_str);
1944 r = log_level_to_string_alloc(LOG_PRI(c->syslog_priority), &lvl_str);
1949 "%sSyslogFacility: %s\n"
1950 "%sSyslogLevel: %s\n",
1951 prefix, strna(fac_str),
1952 prefix, strna(lvl_str));
1957 if (c->capabilities) {
1959 if ((t = cap_to_text(c->capabilities, NULL))) {
1960 fprintf(f, "%sCapabilities: %s\n",
1967 fprintf(f, "%sSecure Bits:%s%s%s%s%s%s\n",
1969 (c->secure_bits & 1<<SECURE_KEEP_CAPS) ? " keep-caps" : "",
1970 (c->secure_bits & 1<<SECURE_KEEP_CAPS_LOCKED) ? " keep-caps-locked" : "",
1971 (c->secure_bits & 1<<SECURE_NO_SETUID_FIXUP) ? " no-setuid-fixup" : "",
1972 (c->secure_bits & 1<<SECURE_NO_SETUID_FIXUP_LOCKED) ? " no-setuid-fixup-locked" : "",
1973 (c->secure_bits & 1<<SECURE_NOROOT) ? " noroot" : "",
1974 (c->secure_bits & 1<<SECURE_NOROOT_LOCKED) ? "noroot-locked" : "");
1976 if (c->capability_bounding_set_drop) {
1978 fprintf(f, "%sCapabilityBoundingSet:", prefix);
1980 for (l = 0; l <= cap_last_cap(); l++)
1981 if (!(c->capability_bounding_set_drop & ((uint64_t) 1ULL << (uint64_t) l))) {
1984 if ((t = cap_to_name(l))) {
1985 fprintf(f, " %s", t);
1994 fprintf(f, "%sUser: %s\n", prefix, c->user);
1996 fprintf(f, "%sGroup: %s\n", prefix, c->group);
1998 if (strv_length(c->supplementary_groups) > 0) {
1999 fprintf(f, "%sSupplementaryGroups:", prefix);
2000 strv_fprintf(f, c->supplementary_groups);
2005 fprintf(f, "%sPAMName: %s\n", prefix, c->pam_name);
2007 if (strv_length(c->read_write_dirs) > 0) {
2008 fprintf(f, "%sReadWriteDirs:", prefix);
2009 strv_fprintf(f, c->read_write_dirs);
2013 if (strv_length(c->read_only_dirs) > 0) {
2014 fprintf(f, "%sReadOnlyDirs:", prefix);
2015 strv_fprintf(f, c->read_only_dirs);
2019 if (strv_length(c->inaccessible_dirs) > 0) {
2020 fprintf(f, "%sInaccessibleDirs:", prefix);
2021 strv_fprintf(f, c->inaccessible_dirs);
2027 "%sUtmpIdentifier: %s\n",
2028 prefix, c->utmp_id);
2031 void exec_status_start(ExecStatus *s, pid_t pid) {
2036 dual_timestamp_get(&s->start_timestamp);
2039 void exec_status_exit(ExecStatus *s, ExecContext *context, pid_t pid, int code, int status) {
2042 if (s->pid && s->pid != pid)
2046 dual_timestamp_get(&s->exit_timestamp);
2052 if (context->utmp_id)
2053 utmp_put_dead_process(context->utmp_id, pid, code, status);
2055 exec_context_tty_reset(context);
2059 void exec_status_dump(ExecStatus *s, FILE *f, const char *prefix) {
2060 char buf[FORMAT_TIMESTAMP_MAX];
2073 prefix, (unsigned long) s->pid);
2075 if (s->start_timestamp.realtime > 0)
2077 "%sStart Timestamp: %s\n",
2078 prefix, format_timestamp(buf, sizeof(buf), s->start_timestamp.realtime));
2080 if (s->exit_timestamp.realtime > 0)
2082 "%sExit Timestamp: %s\n"
2084 "%sExit Status: %i\n",
2085 prefix, format_timestamp(buf, sizeof(buf), s->exit_timestamp.realtime),
2086 prefix, sigchld_code_to_string(s->code),
2090 char *exec_command_line(char **argv) {
2098 STRV_FOREACH(a, argv)
2101 if (!(n = new(char, k)))
2105 STRV_FOREACH(a, argv) {
2112 if (strpbrk(*a, WHITESPACE)) {
2123 /* FIXME: this doesn't really handle arguments that have
2124 * spaces and ticks in them */
2129 void exec_command_dump(ExecCommand *c, FILE *f, const char *prefix) {
2131 const char *prefix2;
2140 p2 = strappend(prefix, "\t");
2141 prefix2 = p2 ? p2 : prefix;
2143 cmd = exec_command_line(c->argv);
2146 "%sCommand Line: %s\n",
2147 prefix, cmd ? cmd : strerror(ENOMEM));
2151 exec_status_dump(&c->exec_status, f, prefix2);
2156 void exec_command_dump_list(ExecCommand *c, FILE *f, const char *prefix) {
2162 LIST_FOREACH(command, c, c)
2163 exec_command_dump(c, f, prefix);
2166 void exec_command_append_list(ExecCommand **l, ExecCommand *e) {
2173 /* It's kind of important, that we keep the order here */
2174 LIST_FIND_TAIL(command, *l, end);
2175 LIST_INSERT_AFTER(command, *l, end, e);
2180 int exec_command_set(ExecCommand *c, const char *path, ...) {
2188 l = strv_new_ap(path, ap);
2209 static int exec_runtime_allocate(ExecRuntime **rt) {
2214 *rt = new0(ExecRuntime, 1);
2219 (*rt)->netns_storage_socket[0] = (*rt)->netns_storage_socket[1] = -1;
2224 int exec_runtime_make(ExecRuntime **rt, ExecContext *c, const char *id) {
2234 if (!c->private_network && !c->private_tmp)
2237 r = exec_runtime_allocate(rt);
2241 if (c->private_network && (*rt)->netns_storage_socket[0] < 0) {
2242 if (socketpair(AF_UNIX, SOCK_DGRAM, 0, (*rt)->netns_storage_socket) < 0)
2246 if (c->private_tmp && !(*rt)->tmp_dir) {
2247 r = setup_tmp_dirs(id, &(*rt)->tmp_dir, &(*rt)->var_tmp_dir);
2255 ExecRuntime *exec_runtime_ref(ExecRuntime *r) {
2257 assert(r->n_ref > 0);
2263 ExecRuntime *exec_runtime_unref(ExecRuntime *r) {
2268 assert(r->n_ref > 0);
2271 if (r->n_ref <= 0) {
2273 free(r->var_tmp_dir);
2274 close_pipe(r->netns_storage_socket);
2281 int exec_runtime_serialize(ExecRuntime *rt, Unit *u, FILE *f, FDSet *fds) {
2290 unit_serialize_item(u, f, "tmp-dir", rt->tmp_dir);
2292 if (rt->var_tmp_dir)
2293 unit_serialize_item(u, f, "var-tmp-dir", rt->var_tmp_dir);
2295 if (rt->netns_storage_socket[0] >= 0) {
2298 copy = fdset_put_dup(fds, rt->netns_storage_socket[0]);
2302 unit_serialize_item_format(u, f, "netns-socket-0", "%i", copy);
2305 if (rt->netns_storage_socket[1] >= 0) {
2308 copy = fdset_put_dup(fds, rt->netns_storage_socket[1]);
2312 unit_serialize_item_format(u, f, "netns-socket-1", "%i", copy);
2318 int exec_runtime_deserialize_item(ExecRuntime **rt, Unit *u, const char *key, const char *value, FDSet *fds) {
2325 if (streq(key, "tmp-dir")) {
2328 r = exec_runtime_allocate(rt);
2332 copy = strdup(value);
2336 free((*rt)->tmp_dir);
2337 (*rt)->tmp_dir = copy;
2339 } else if (streq(key, "var-tmp-dir")) {
2342 r = exec_runtime_allocate(rt);
2346 copy = strdup(value);
2350 free((*rt)->var_tmp_dir);
2351 (*rt)->var_tmp_dir = copy;
2353 } else if (streq(key, "netns-socket-0")) {
2356 r = exec_runtime_allocate(rt);
2360 if (safe_atoi(value, &fd) < 0 || !fdset_contains(fds, fd))
2361 log_debug_unit(u->id, "Failed to parse netns socket value %s", value);
2363 if ((*rt)->netns_storage_socket[0] >= 0)
2364 close_nointr_nofail((*rt)->netns_storage_socket[0]);
2366 (*rt)->netns_storage_socket[0] = fdset_remove(fds, fd);
2368 } else if (streq(key, "netns-socket-1")) {
2371 r = exec_runtime_allocate(rt);
2375 if (safe_atoi(value, &fd) < 0 || !fdset_contains(fds, fd))
2376 log_debug_unit(u->id, "Failed to parse netns socket value %s", value);
2378 if ((*rt)->netns_storage_socket[1] >= 0)
2379 close_nointr_nofail((*rt)->netns_storage_socket[1]);
2381 (*rt)->netns_storage_socket[1] = fdset_remove(fds, fd);
2389 static void *remove_tmpdir_thread(void *p) {
2390 _cleanup_free_ char *path = p;
2392 rm_rf_dangerous(path, false, true, false);
2396 void exec_runtime_destroy(ExecRuntime *rt) {
2400 /* If there are multiple users of this, let's leave the stuff around */
2405 log_debug("Spawning thread to nuke %s", rt->tmp_dir);
2406 asynchronous_job(remove_tmpdir_thread, rt->tmp_dir);
2410 if (rt->var_tmp_dir) {
2411 log_debug("Spawning thread to nuke %s", rt->var_tmp_dir);
2412 asynchronous_job(remove_tmpdir_thread, rt->var_tmp_dir);
2413 rt->var_tmp_dir = NULL;
2416 close_pipe(rt->netns_storage_socket);
2419 static const char* const exec_input_table[_EXEC_INPUT_MAX] = {
2420 [EXEC_INPUT_NULL] = "null",
2421 [EXEC_INPUT_TTY] = "tty",
2422 [EXEC_INPUT_TTY_FORCE] = "tty-force",
2423 [EXEC_INPUT_TTY_FAIL] = "tty-fail",
2424 [EXEC_INPUT_SOCKET] = "socket"
2427 DEFINE_STRING_TABLE_LOOKUP(exec_input, ExecInput);
2429 static const char* const exec_output_table[_EXEC_OUTPUT_MAX] = {
2430 [EXEC_OUTPUT_INHERIT] = "inherit",
2431 [EXEC_OUTPUT_NULL] = "null",
2432 [EXEC_OUTPUT_TTY] = "tty",
2433 [EXEC_OUTPUT_SYSLOG] = "syslog",
2434 [EXEC_OUTPUT_SYSLOG_AND_CONSOLE] = "syslog+console",
2435 [EXEC_OUTPUT_KMSG] = "kmsg",
2436 [EXEC_OUTPUT_KMSG_AND_CONSOLE] = "kmsg+console",
2437 [EXEC_OUTPUT_JOURNAL] = "journal",
2438 [EXEC_OUTPUT_JOURNAL_AND_CONSOLE] = "journal+console",
2439 [EXEC_OUTPUT_SOCKET] = "socket"
2442 DEFINE_STRING_TABLE_LOOKUP(exec_output, ExecOutput);