1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright 2010 Lennart Poettering
7 systemd is free software; you can redistribute it and/or modify it
8 under the terms of the GNU Lesser General Public License as published by
9 the Free Software Foundation; either version 2.1 of the License, or
10 (at your option) any later version.
12 systemd is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public License
18 along with systemd; If not, see <http://www.gnu.org/licenses/>.
24 #include <linux/oom.h>
29 //#include <stdio_ext.h>
33 #include <sys/personality.h>
34 #include <sys/prctl.h>
35 #include <sys/types.h>
39 #if HAVE_VALGRIND_VALGRIND_H
40 #include <valgrind/valgrind.h>
43 #include "alloc-util.h"
44 //#include "architecture.h"
53 #include "process-util.h"
54 //#include "raw-clone.h"
55 #include "signal-util.h"
56 //#include "stat-util.h"
57 #include "string-table.h"
58 #include "string-util.h"
59 //#include "terminal-util.h"
60 #include "user-util.h"
63 int get_process_state(pid_t pid) {
67 _cleanup_free_ char *line = NULL;
71 p = procfs_file_alloca(pid, "stat");
73 r = read_one_line_file(p, &line);
79 p = strrchr(line, ')');
85 if (sscanf(p, " %c", &state) != 1)
88 return (unsigned char) state;
91 int get_process_comm(pid_t pid, char **name) {
98 p = procfs_file_alloca(pid, "comm");
100 r = read_one_line_file(p, name);
107 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) {
108 _cleanup_fclose_ FILE *f = NULL;
110 char *k, *ans = NULL;
117 /* Retrieves a process' command line. Replaces unprintable characters while doing so by whitespace (coalescing
118 * multiple sequential ones into one). If max_length is != 0 will return a string of the specified size at most
119 * (the trailing NUL byte does count towards the length here!), abbreviated with a "..." ellipsis. If
120 * comm_fallback is true and the process has no command line set (the case for kernel threads), or has a
121 * command line that resolves to the empty string will return the "comm" name of the process instead.
123 * Returns -ESRCH if the process doesn't exist, and -ENOENT if the process has no command line (and
124 * comm_fallback is false). Returns 0 and sets *line otherwise. */
126 p = procfs_file_alloca(pid, "cmdline");
135 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
137 if (max_length == 1) {
139 /* If there's only room for one byte, return the empty string */
147 } else if (max_length == 0) {
148 size_t len = 0, allocated = 0;
150 while ((c = getc(f)) != EOF) {
152 if (!GREEDY_REALLOC(ans, allocated, len+3)) {
174 bool dotdotdot = false;
177 ans = new(char, max_length);
183 while ((c = getc(f)) != EOF) {
210 if (max_length <= 4) {
214 k = ans + max_length - 4;
217 /* Eat up final spaces */
218 while (k > ans && isspace(k[-1])) {
224 strncpy(k, "...", left-1);
230 /* Kernel threads have no argv[] */
232 _cleanup_free_ char *t = NULL;
240 h = get_process_comm(pid, &t);
245 ans = strjoin("[", t, "]");
251 if (l + 3 <= max_length)
252 ans = strjoin("[", t, "]");
253 else if (max_length <= 6) {
255 ans = new(char, max_length);
259 memcpy(ans, "[...]", max_length-1);
260 ans[max_length-1] = 0;
264 t[max_length - 6] = 0;
266 /* Chop off final spaces */
268 while (e > t && isspace(e[-1]))
272 ans = strjoin("[", t, "...]");
283 #if 0 /// UNNEEDED by elogind
284 int rename_process(const char name[]) {
285 static size_t mm_size = 0;
286 static char *mm = NULL;
287 bool truncated = false;
290 /* This is a like a poor man's setproctitle(). It changes the comm field, argv[0], and also the glibc's
291 * internally used name of the process. For the first one a limit of 16 chars applies; to the second one in
292 * many cases one of 10 (i.e. length of "/sbin/init") — however if we have CAP_SYS_RESOURCES it is unbounded;
293 * to the third one 7 (i.e. the length of "systemd". If you pass a longer string it will likely be
296 * Returns 0 if a name was set but truncated, > 0 if it was set but not truncated. */
299 return -EINVAL; /* let's not confuse users unnecessarily with an empty name */
303 /* First step, change the comm field. */
304 (void) prctl(PR_SET_NAME, name);
305 if (l > 15) /* Linux process names can be 15 chars at max */
308 /* Second step, change glibc's ID of the process name. */
309 if (program_invocation_name) {
312 k = strlen(program_invocation_name);
313 strncpy(program_invocation_name, name, k);
318 /* Third step, completely replace the argv[] array the kernel maintains for us. This requires privileges, but
319 * has the advantage that the argv[] array is exactly what we want it to be, and not filled up with zeros at
320 * the end. This is the best option for changing /proc/self/cmdline. */
322 /* Let's not bother with this if we don't have euid == 0. Strictly speaking we should check for the
323 * CAP_SYS_RESOURCE capability which is independent of the euid. In our own code the capability generally is
324 * present only for euid == 0, hence let's use this as quick bypass check, to avoid calling mmap() if
325 * PR_SET_MM_ARG_{START,END} fails with EPERM later on anyway. After all geteuid() is dead cheap to call, but
328 log_debug("Skipping PR_SET_MM, as we don't have privileges.");
329 else if (mm_size < l+1) {
333 nn_size = PAGE_ALIGN(l+1);
334 nn = mmap(NULL, nn_size, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
335 if (nn == MAP_FAILED) {
336 log_debug_errno(errno, "mmap() failed: %m");
340 strncpy(nn, name, nn_size);
342 /* Now, let's tell the kernel about this new memory */
343 if (prctl(PR_SET_MM, PR_SET_MM_ARG_START, (unsigned long) nn, 0, 0) < 0) {
344 log_debug_errno(errno, "PR_SET_MM_ARG_START failed, proceeding without: %m");
345 (void) munmap(nn, nn_size);
349 /* And update the end pointer to the new end, too. If this fails, we don't really know what to do, it's
350 * pretty unlikely that we can rollback, hence we'll just accept the failure, and continue. */
351 if (prctl(PR_SET_MM, PR_SET_MM_ARG_END, (unsigned long) nn + l + 1, 0, 0) < 0)
352 log_debug_errno(errno, "PR_SET_MM_ARG_END failed, proceeding without: %m");
355 (void) munmap(mm, mm_size);
360 strncpy(mm, name, mm_size);
362 /* Update the end pointer, continuing regardless of any failure. */
363 if (prctl(PR_SET_MM, PR_SET_MM_ARG_END, (unsigned long) mm + l + 1, 0, 0) < 0)
364 log_debug_errno(errno, "PR_SET_MM_ARG_END failed, proceeding without: %m");
368 /* Fourth step: in all cases we'll also update the original argv[], so that our own code gets it right too if
369 * it still looks here */
371 if (saved_argc > 0) {
377 k = strlen(saved_argv[0]);
378 strncpy(saved_argv[0], name, k);
383 for (i = 1; i < saved_argc; i++) {
387 memzero(saved_argv[i], strlen(saved_argv[i]));
395 int is_kernel_thread(pid_t pid) {
402 if (IN_SET(pid, 0, 1) || pid == getpid_cached()) /* pid 1, and we ourselves certainly aren't a kernel thread */
407 p = procfs_file_alloca(pid, "cmdline");
415 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
417 count = fread(&c, 1, 1, f);
421 /* Kernel threads have an empty cmdline */
424 return eof ? 1 : -errno;
429 #if 0 /// UNNEEDED by elogind
430 int get_process_capeff(pid_t pid, char **capeff) {
437 p = procfs_file_alloca(pid, "status");
439 r = get_proc_field(p, "CapEff", WHITESPACE, capeff);
447 static int get_process_link_contents(const char *proc_file, char **name) {
453 r = readlink_malloc(proc_file, name);
462 int get_process_exe(pid_t pid, char **name) {
469 p = procfs_file_alloca(pid, "exe");
470 r = get_process_link_contents(p, name);
474 d = endswith(*name, " (deleted)");
481 #if 0 /// UNNEEDED by elogind
482 static int get_process_id(pid_t pid, const char *field, uid_t *uid) {
483 _cleanup_fclose_ FILE *f = NULL;
493 p = procfs_file_alloca(pid, "status");
501 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
503 FOREACH_LINE(line, f, return -errno) {
508 if (startswith(l, field)) {
510 l += strspn(l, WHITESPACE);
512 l[strcspn(l, WHITESPACE)] = 0;
514 return parse_uid(l, uid);
521 int get_process_uid(pid_t pid, uid_t *uid) {
523 if (pid == 0 || pid == getpid_cached()) {
528 return get_process_id(pid, "Uid:", uid);
531 int get_process_gid(pid_t pid, gid_t *gid) {
533 if (pid == 0 || pid == getpid_cached()) {
538 assert_cc(sizeof(uid_t) == sizeof(gid_t));
539 return get_process_id(pid, "Gid:", gid);
542 int get_process_cwd(pid_t pid, char **cwd) {
547 p = procfs_file_alloca(pid, "cwd");
549 return get_process_link_contents(p, cwd);
552 int get_process_root(pid_t pid, char **root) {
557 p = procfs_file_alloca(pid, "root");
559 return get_process_link_contents(p, root);
562 int get_process_environ(pid_t pid, char **env) {
563 _cleanup_fclose_ FILE *f = NULL;
564 _cleanup_free_ char *outcome = NULL;
567 size_t allocated = 0, sz = 0;
572 p = procfs_file_alloca(pid, "environ");
581 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
583 while ((c = fgetc(f)) != EOF) {
584 if (!GREEDY_REALLOC(outcome, allocated, sz + 5))
588 outcome[sz++] = '\n';
590 sz += cescape_char(c, outcome + sz);
594 outcome = strdup("");
606 int get_process_ppid(pid_t pid, pid_t *_ppid) {
608 _cleanup_free_ char *line = NULL;
615 if (pid == 0 || pid == getpid_cached()) {
620 p = procfs_file_alloca(pid, "stat");
621 r = read_one_line_file(p, &line);
627 /* Let's skip the pid and comm fields. The latter is enclosed
628 * in () but does not escape any () in its value, so let's
629 * skip over it manually */
631 p = strrchr(line, ')');
643 if ((long unsigned) (pid_t) ppid != ppid)
646 *_ppid = (pid_t) ppid;
652 int wait_for_terminate(pid_t pid, siginfo_t *status) {
663 if (waitid(P_PID, pid, status, WEXITED) < 0) {
668 return negative_errno();
677 * < 0 : wait_for_terminate() failed to get the state of the
678 * process, the process was terminated by a signal, or
679 * failed for an unknown reason.
680 * >=0 : The process terminated normally, and its exit code is
683 * That is, success is indicated by a return value of zero, and an
684 * error is indicated by a non-zero value.
686 * A warning is emitted if the process terminates abnormally,
687 * and also if it returns non-zero unless check_exit_code is true.
689 int wait_for_terminate_and_warn(const char *name, pid_t pid, bool check_exit_code) {
696 r = wait_for_terminate(pid, &status);
698 return log_warning_errno(r, "Failed to wait for %s: %m", name);
700 if (status.si_code == CLD_EXITED) {
701 if (status.si_status != 0)
702 log_full(check_exit_code ? LOG_WARNING : LOG_DEBUG,
703 "%s failed with error code %i.", name, status.si_status);
705 log_debug("%s succeeded.", name);
707 return status.si_status;
708 } else if (IN_SET(status.si_code, CLD_KILLED, CLD_DUMPED)) {
710 log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status));
714 log_warning("%s failed due to unknown reason.", name);
720 * < 0 : wait_for_terminate_with_timeout() failed to get the state of the
721 * process, the process timed out, the process was terminated by a
722 * signal, or failed for an unknown reason.
723 * >=0 : The process terminated normally with no failures.
725 * Success is indicated by a return value of zero, a timeout is indicated
726 * by ETIMEDOUT, and all other child failure states are indicated by error
727 * is indicated by a non-zero value.
729 int wait_for_terminate_with_timeout(pid_t pid, usec_t timeout) {
734 assert_se(sigemptyset(&mask) == 0);
735 assert_se(sigaddset(&mask, SIGCHLD) == 0);
737 /* Drop into a sigtimewait-based timeout. Waiting for the
739 until = now(CLOCK_MONOTONIC) + timeout;
742 siginfo_t status = {};
745 n = now(CLOCK_MONOTONIC);
749 r = sigtimedwait(&mask, NULL, timespec_store(&ts, until - n)) < 0 ? -errno : 0;
750 /* Assuming we woke due to the child exiting. */
751 if (waitid(P_PID, pid, &status, WEXITED|WNOHANG) == 0) {
752 if (status.si_pid == pid) {
753 /* This is the correct child.*/
754 if (status.si_code == CLD_EXITED)
755 return (status.si_status == 0) ? 0 : -EPROTO;
760 /* Not the child, check for errors and proceed appropriately */
764 /* Timed out, child is likely hung. */
767 /* Received a different signal and should retry */
770 /* Return any unexpected errors */
779 #if 0 /// UNNEEDED by elogind
780 void sigkill_wait(pid_t pid) {
783 if (kill(pid, SIGKILL) > 0)
784 (void) wait_for_terminate(pid, NULL);
787 void sigkill_waitp(pid_t *pid) {
796 int kill_and_sigcont(pid_t pid, int sig) {
799 r = kill(pid, sig) < 0 ? -errno : 0;
801 /* If this worked, also send SIGCONT, unless we already just sent a SIGCONT, or SIGKILL was sent which isn't
802 * affected by a process being suspended anyway. */
803 if (r >= 0 && !IN_SET(sig, SIGCONT, SIGKILL))
804 (void) kill(pid, SIGCONT);
810 int getenv_for_pid(pid_t pid, const char *field, char **_value) {
811 _cleanup_fclose_ FILE *f = NULL;
822 path = procfs_file_alloca(pid, "environ");
824 f = fopen(path, "re");
831 (void) __fsetlocking(f, FSETLOCKING_BYCALLER);
840 for (i = 0; i < sizeof(line)-1; i++) {
844 if (_unlikely_(c == EOF)) {
854 if (strneq(line, field, l) && line[l] == '=') {
855 value = strdup(line + l + 1);
869 bool pid_is_unwaited(pid_t pid) {
870 /* Checks whether a PID is still valid at all, including a zombie */
875 if (pid <= 1) /* If we or PID 1 would be dead and have been waited for, this code would not be running */
878 if (pid == getpid_cached())
881 if (kill(pid, 0) >= 0)
884 return errno != ESRCH;
887 bool pid_is_alive(pid_t pid) {
890 /* Checks whether a PID is still valid and not a zombie */
895 if (pid <= 1) /* If we or PID 1 would be a zombie, this code would not be running */
898 if (pid == getpid_cached())
901 r = get_process_state(pid);
902 if (IN_SET(r, -ESRCH, 'Z'))
908 #if 0 /// UNNEEDED by elogind
909 int pid_from_same_root_fs(pid_t pid) {
915 if (pid == 0 || pid == getpid_cached())
918 root = procfs_file_alloca(pid, "root");
920 return files_same(root, "/proc/1/root", 0);
924 bool is_main_thread(void) {
925 static thread_local int cached = 0;
927 if (_unlikely_(cached == 0))
928 cached = getpid_cached() == gettid() ? 1 : -1;
933 #if 0 /// UNNEEDED by elogind
934 noreturn void freeze(void) {
938 /* Make sure nobody waits for us on a socket anymore */
939 close_all_fds(NULL, 0);
947 bool oom_score_adjust_is_valid(int oa) {
948 return oa >= OOM_SCORE_ADJ_MIN && oa <= OOM_SCORE_ADJ_MAX;
951 unsigned long personality_from_string(const char *p) {
955 return PERSONALITY_INVALID;
957 /* Parse a personality specifier. We use our own identifiers that indicate specific ABIs, rather than just
958 * hints regarding the register size, since we want to keep things open for multiple locally supported ABIs for
959 * the same register size. */
961 architecture = architecture_from_string(p);
962 if (architecture < 0)
963 return PERSONALITY_INVALID;
965 if (architecture == native_architecture())
967 #ifdef SECONDARY_ARCHITECTURE
968 if (architecture == SECONDARY_ARCHITECTURE)
972 return PERSONALITY_INVALID;
975 const char* personality_to_string(unsigned long p) {
976 int architecture = _ARCHITECTURE_INVALID;
979 architecture = native_architecture();
980 #ifdef SECONDARY_ARCHITECTURE
981 else if (p == PER_LINUX32)
982 architecture = SECONDARY_ARCHITECTURE;
985 if (architecture < 0)
988 return architecture_to_string(architecture);
991 int safe_personality(unsigned long p) {
994 /* So here's the deal, personality() is weirdly defined by glibc. In some cases it returns a failure via errno,
995 * and in others as negative return value containing an errno-like value. Let's work around this: this is a
996 * wrapper that uses errno if it is set, and uses the return value otherwise. And then it sets both errno and
997 * the return value indicating the same issue, so that we are definitely on the safe side.
999 * See https://github.com/systemd/systemd/issues/6737 */
1002 ret = personality(p);
1013 int opinionated_personality(unsigned long *ret) {
1016 /* Returns the current personality, or PERSONALITY_INVALID if we can't determine it. This function is a bit
1017 * opinionated though, and ignores all the finer-grained bits and exotic personalities, only distinguishing the
1018 * two most relevant personalities: PER_LINUX and PER_LINUX32. */
1020 current = safe_personality(PERSONALITY_INVALID);
1024 if (((unsigned long) current & 0xffff) == PER_LINUX32)
1032 void valgrind_summary_hack(void) {
1033 #if HAVE_VALGRIND_VALGRIND_H
1034 if (getpid_cached() == 1 && RUNNING_ON_VALGRIND) {
1036 pid = raw_clone(SIGCHLD);
1038 log_emergency_errno(errno, "Failed to fork off valgrind helper: %m");
1042 log_info("Spawned valgrind helper as PID "PID_FMT".", pid);
1043 (void) wait_for_terminate(pid, NULL);
1049 int pid_compare_func(const void *a, const void *b) {
1050 const pid_t *p = a, *q = b;
1052 /* Suitable for usage in qsort() */
1061 int ioprio_parse_priority(const char *s, int *ret) {
1067 r = safe_atoi(s, &i);
1071 if (!ioprio_priority_is_valid(i))
1079 /* The cached PID, possible values:
1081 * == UNSET [0] → cache not initialized yet
1082 * == BUSY [-1] → some thread is initializing it at the moment
1083 * any other → the cached PID
1086 #define CACHED_PID_UNSET ((pid_t) 0)
1087 #define CACHED_PID_BUSY ((pid_t) -1)
1089 static pid_t cached_pid = CACHED_PID_UNSET;
1091 static void reset_cached_pid(void) {
1092 /* Invoked in the child after a fork(), i.e. at the first moment the PID changed */
1093 cached_pid = CACHED_PID_UNSET;
1096 /* We use glibc __register_atfork() + __dso_handle directly here, as they are not included in the glibc
1097 * headers. __register_atfork() is mostly equivalent to pthread_atfork(), but doesn't require us to link against
1098 * libpthread, as it is part of glibc anyway. */
1100 extern int __register_atfork(void (*prepare) (void), void (*parent) (void), void (*child) (void), void * __dso_handle);
1101 extern void* __dso_handle __attribute__ ((__weak__));
1102 #endif // ifdef __GLIBC__
1104 pid_t getpid_cached(void) {
1105 pid_t current_value;
1107 /* getpid_cached() is much like getpid(), but caches the value in local memory, to avoid having to invoke a
1108 * system call each time. This restores glibc behaviour from before 2.24, when getpid() was unconditionally
1109 * cached. Starting with 2.24 getpid() started to become prohibitively expensive when used for detecting when
1110 * objects were used across fork()s. With this caching the old behaviour is somewhat restored.
1112 * https://bugzilla.redhat.com/show_bug.cgi?id=1443976
1113 * https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=c579f48edba88380635ab98cb612030e3ed8691e
1116 current_value = __sync_val_compare_and_swap(&cached_pid, CACHED_PID_UNSET, CACHED_PID_BUSY);
1118 switch (current_value) {
1120 case CACHED_PID_UNSET: { /* Not initialized yet, then do so now */
1125 if (__register_atfork(NULL, NULL, reset_cached_pid, __dso_handle) != 0) {
1126 /* OOM? Let's try again later */
1127 cached_pid = CACHED_PID_UNSET;
1131 cached_pid = new_pid;
1135 case CACHED_PID_BUSY: /* Somebody else is currently initializing */
1138 default: /* Properly initialized */
1139 return current_value;
1143 int must_be_root(void) {
1148 log_error("Need to be root.");
1154 const int except_fds[],
1155 size_t n_except_fds,
1159 pid_t original_pid, pid;
1164 /* A wrapper around fork(), that does a couple of important initializations in addition to mere forking. Always
1165 * returns the child's PID in *ret_pid. Returns == 0 in the child, and > 0 in the parent. */
1167 original_pid = getpid_cached();
1169 block_signals = flags & (FORK_RESET_SIGNALS|FORK_DEATHSIG);
1171 if (block_signals) {
1174 /* We temporarily block all signals, so that the new child has them blocked initially. This way, we can be sure
1175 * that SIGTERMs are not lost we might send to the child. */
1176 if (sigfillset(&ss) < 0)
1177 return log_debug_errno(errno, "Failed to reset signal set: %m");
1179 if (sigprocmask(SIG_SETMASK, &ss, &saved_ss) < 0)
1180 return log_debug_errno(errno, "Failed to reset signal mask: %m");
1187 if (block_signals) /* undo what we did above */
1188 (void) sigprocmask(SIG_SETMASK, &saved_ss, NULL);
1190 return log_debug_errno(r, "Failed to fork: %m");
1193 /* We are in the parent process */
1195 if (block_signals) /* undo what we did above */
1196 (void) sigprocmask(SIG_SETMASK, &saved_ss, NULL);
1198 log_debug("Sucessfully forked off '%s' as PID " PID_FMT ".", strna(name), pid);
1206 /* We are in the child process */
1208 if (flags & FORK_REOPEN_LOG) {
1209 /* Close the logs if requested, before we log anything. And make sure we reopen it if needed. */
1211 log_set_open_when_needed(true);
1215 r = rename_process(name);
1217 log_debug_errno(r, "Failed to rename process, ignoring: %m");
1220 if (flags & FORK_DEATHSIG)
1221 if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0) {
1222 log_debug_errno(errno, "Failed to set death signal: %m");
1223 _exit(EXIT_FAILURE);
1226 if (flags & FORK_RESET_SIGNALS) {
1227 r = reset_all_signal_handlers();
1229 log_debug_errno(r, "Failed to reset signal handlers: %m");
1230 _exit(EXIT_FAILURE);
1233 /* This implicitly undoes the signal mask stuff we did before the fork()ing above */
1234 r = reset_signal_mask();
1236 log_debug_errno(r, "Failed to reset signal mask: %m");
1237 _exit(EXIT_FAILURE);
1239 } else if (block_signals) { /* undo what we did above */
1240 if (sigprocmask(SIG_SETMASK, &saved_ss, NULL) < 0) {
1241 log_debug_errno(errno, "Failed to restore signal mask: %m");
1242 _exit(EXIT_FAILURE);
1246 if (flags & FORK_DEATHSIG) {
1247 /* Let's see if the parent PID is still the one we started from? If not, then the parent
1248 * already died by the time we set PR_SET_PDEATHSIG, hence let's emulate the effect */
1250 if (getppid() != original_pid) {
1251 log_debug("Parent died early, raising SIGTERM.");
1252 (void) raise(SIGTERM);
1253 _exit(EXIT_FAILURE);
1257 if (flags & FORK_CLOSE_ALL_FDS) {
1258 /* Close the logs here in case it got reopened above, as close_all_fds() would close them for us */
1261 r = close_all_fds(except_fds, n_except_fds);
1263 log_debug_errno(r, "Failed to close all file descriptors: %m");
1264 _exit(EXIT_FAILURE);
1268 /* When we were asked to reopen the logs, do so again now */
1269 if (flags & FORK_REOPEN_LOG) {
1271 log_set_open_when_needed(false);
1274 if (flags & FORK_NULL_STDIO) {
1275 r = make_null_stdio();
1277 log_debug_errno(r, "Failed to connect stdin/stdout to /dev/null: %m");
1278 _exit(EXIT_FAILURE);
1283 *ret_pid = getpid_cached();
1288 #if 0 /// UNNEEDED by elogind
1289 static const char *const ioprio_class_table[] = {
1290 [IOPRIO_CLASS_NONE] = "none",
1291 [IOPRIO_CLASS_RT] = "realtime",
1292 [IOPRIO_CLASS_BE] = "best-effort",
1293 [IOPRIO_CLASS_IDLE] = "idle"
1296 DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, INT_MAX);
1298 static const char *const sigchld_code_table[] = {
1299 [CLD_EXITED] = "exited",
1300 [CLD_KILLED] = "killed",
1301 [CLD_DUMPED] = "dumped",
1302 [CLD_TRAPPED] = "trapped",
1303 [CLD_STOPPED] = "stopped",
1304 [CLD_CONTINUED] = "continued",
1307 DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int);
1309 static const char* const sched_policy_table[] = {
1310 [SCHED_OTHER] = "other",
1311 [SCHED_BATCH] = "batch",
1312 [SCHED_IDLE] = "idle",
1313 [SCHED_FIFO] = "fifo",
1317 DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX);