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/>.
31 #include <sys/resource.h>
32 #include <linux/sched.h>
33 #include <sys/types.h>
37 #include <sys/ioctl.h>
39 #include <linux/tiocl.h>
42 #include <sys/inotify.h>
45 #include <sys/prctl.h>
46 #include <sys/utsname.h>
48 #include <netinet/ip.h>
57 #include <linux/magic.h>
61 #include <sys/personality.h>
65 #ifdef HAVE_SYS_AUXV_H
76 #include "path-util.h"
77 #include "exit-status.h"
81 #include "device-nodes.h"
88 char **saved_argv = NULL;
90 static volatile unsigned cached_columns = 0;
91 static volatile unsigned cached_lines = 0;
93 size_t page_size(void) {
94 static thread_local size_t pgsz = 0;
97 if (_likely_(pgsz > 0))
100 r = sysconf(_SC_PAGESIZE);
107 bool streq_ptr(const char *a, const char *b) {
109 /* Like streq(), but tries to make sense of NULL pointers */
120 char* endswith(const char *s, const char *postfix) {
127 pl = strlen(postfix);
130 return (char*) s + sl;
135 if (memcmp(s + sl - pl, postfix, pl) != 0)
138 return (char*) s + sl - pl;
141 bool first_word(const char *s, const char *word) {
156 if (memcmp(s, word, wl) != 0)
160 strchr(WHITESPACE, s[wl]);
163 int close_nointr(int fd) {
169 /* Just ignore EINTR; a retry loop is the wrong
170 * thing to do on Linux.
172 * http://lkml.indiana.edu/hypermail/linux/kernel/0509.1/0877.html
173 * https://bugzilla.gnome.org/show_bug.cgi?id=682819
174 * http://utcc.utoronto.ca/~cks/space/blog/unix/CloseEINTR
175 * https://sites.google.com/site/michaelsafyan/software-engineering/checkforeintrwheninvokingclosethinkagain
177 if (_unlikely_(r < 0 && errno == EINTR))
185 void close_nointr_nofail(int fd) {
188 /* like close_nointr() but cannot fail, and guarantees errno
191 assert_se(close_nointr(fd) == 0);
194 void close_many(const int fds[], unsigned n_fd) {
197 assert(fds || n_fd <= 0);
199 for (i = 0; i < n_fd; i++)
200 close_nointr_nofail(fds[i]);
203 int unlink_noerrno(const char *path) {
214 int parse_boolean(const char *v) {
217 if (streq(v, "1") || v[0] == 'y' || v[0] == 'Y' || v[0] == 't' || v[0] == 'T' || strcaseeq(v, "on"))
219 else if (streq(v, "0") || v[0] == 'n' || v[0] == 'N' || v[0] == 'f' || v[0] == 'F' || strcaseeq(v, "off"))
225 int parse_pid(const char *s, pid_t* ret_pid) {
226 unsigned long ul = 0;
233 r = safe_atolu(s, &ul);
239 if ((unsigned long) pid != ul)
249 int parse_uid(const char *s, uid_t* ret_uid) {
250 unsigned long ul = 0;
257 r = safe_atolu(s, &ul);
263 if ((unsigned long) uid != ul)
270 int safe_atou(const char *s, unsigned *ret_u) {
278 l = strtoul(s, &x, 0);
280 if (!x || x == s || *x || errno)
281 return errno > 0 ? -errno : -EINVAL;
283 if ((unsigned long) (unsigned) l != l)
286 *ret_u = (unsigned) l;
290 int safe_atoi(const char *s, int *ret_i) {
298 l = strtol(s, &x, 0);
300 if (!x || x == s || *x || errno)
301 return errno > 0 ? -errno : -EINVAL;
303 if ((long) (int) l != l)
310 int safe_atollu(const char *s, long long unsigned *ret_llu) {
312 unsigned long long l;
318 l = strtoull(s, &x, 0);
320 if (!x || x == s || *x || errno)
321 return errno ? -errno : -EINVAL;
327 int safe_atolli(const char *s, long long int *ret_lli) {
335 l = strtoll(s, &x, 0);
337 if (!x || x == s || *x || errno)
338 return errno ? -errno : -EINVAL;
344 int safe_atod(const char *s, double *ret_d) {
351 RUN_WITH_LOCALE(LC_NUMERIC_MASK, "C") {
356 if (!x || x == s || *x || errno)
357 return errno ? -errno : -EINVAL;
363 static size_t strcspn_escaped(const char *s, const char *reject) {
364 bool escaped = false;
367 for (n=0; s[n]; n++) {
370 else if (s[n] == '\\')
372 else if (strchr(reject, s[n]))
378 /* Split a string into words. */
379 char *split(const char *c, size_t *l, const char *separator, bool quoted, char **state) {
382 current = *state ? *state : (char*) c;
384 if (!*current || *c == 0)
387 current += strspn(current, separator);
391 if (quoted && strchr("\'\"", *current)) {
392 char quotechar = *(current++);
393 *l = strcspn_escaped(current, (char[]){quotechar, '\0'});
394 *state = current+*l+1;
396 *l = strcspn_escaped(current, separator);
399 *l = strcspn(current, separator);
403 return (char*) current;
406 int get_parent_of_pid(pid_t pid, pid_t *_ppid) {
408 _cleanup_free_ char *line = NULL;
420 p = procfs_file_alloca(pid, "stat");
421 r = read_one_line_file(p, &line);
425 /* Let's skip the pid and comm fields. The latter is enclosed
426 * in () but does not escape any () in its value, so let's
427 * skip over it manually */
429 p = strrchr(line, ')');
441 if ((long unsigned) (pid_t) ppid != ppid)
444 *_ppid = (pid_t) ppid;
449 int get_starttime_of_pid(pid_t pid, unsigned long long *st) {
451 _cleanup_free_ char *line = NULL;
457 p = procfs_file_alloca(pid, "stat");
458 r = read_one_line_file(p, &line);
462 /* Let's skip the pid and comm fields. The latter is enclosed
463 * in () but does not escape any () in its value, so let's
464 * skip over it manually */
466 p = strrchr(line, ')');
488 "%*d " /* priority */
490 "%*d " /* num_threads */
491 "%*d " /* itrealvalue */
492 "%llu " /* starttime */,
499 int fchmod_umask(int fd, mode_t m) {
504 r = fchmod(fd, m & (~u)) < 0 ? -errno : 0;
510 char *truncate_nl(char *s) {
513 s[strcspn(s, NEWLINE)] = 0;
517 int get_process_state(pid_t pid) {
521 _cleanup_free_ char *line = NULL;
525 p = procfs_file_alloca(pid, "stat");
526 r = read_one_line_file(p, &line);
530 p = strrchr(line, ')');
536 if (sscanf(p, " %c", &state) != 1)
539 return (unsigned char) state;
542 int get_process_comm(pid_t pid, char **name) {
549 p = procfs_file_alloca(pid, "comm");
551 r = read_one_line_file(p, name);
558 int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) {
559 _cleanup_fclose_ FILE *f = NULL;
567 p = procfs_file_alloca(pid, "cmdline");
573 if (max_length == 0) {
574 size_t len = 0, allocated = 0;
576 while ((c = getc(f)) != EOF) {
578 if (!GREEDY_REALLOC(r, allocated, len+2)) {
583 r[len++] = isprint(c) ? c : ' ';
593 r = new(char, max_length);
599 while ((c = getc(f)) != EOF) {
621 size_t n = MIN(left-1, 3U);
628 /* Kernel threads have no argv[] */
629 if (r == NULL || r[0] == 0) {
630 _cleanup_free_ char *t = NULL;
638 h = get_process_comm(pid, &t);
642 r = strjoin("[", t, "]", NULL);
651 int is_kernel_thread(pid_t pid) {
663 p = procfs_file_alloca(pid, "cmdline");
668 count = fread(&c, 1, 1, f);
672 /* Kernel threads have an empty cmdline */
675 return eof ? 1 : -errno;
680 int get_process_capeff(pid_t pid, char **capeff) {
686 p = procfs_file_alloca(pid, "status");
688 return get_status_field(p, "\nCapEff:", capeff);
691 int get_process_exe(pid_t pid, char **name) {
699 p = procfs_file_alloca(pid, "exe");
701 r = readlink_malloc(p, name);
703 return r == -ENOENT ? -ESRCH : r;
705 d = endswith(*name, " (deleted)");
712 static int get_process_id(pid_t pid, const char *field, uid_t *uid) {
713 _cleanup_fclose_ FILE *f = NULL;
723 p = procfs_file_alloca(pid, "status");
728 FOREACH_LINE(line, f, return -errno) {
733 if (startswith(l, field)) {
735 l += strspn(l, WHITESPACE);
737 l[strcspn(l, WHITESPACE)] = 0;
739 return parse_uid(l, uid);
746 int get_process_uid(pid_t pid, uid_t *uid) {
747 return get_process_id(pid, "Uid:", uid);
750 int get_process_gid(pid_t pid, gid_t *gid) {
751 assert_cc(sizeof(uid_t) == sizeof(gid_t));
752 return get_process_id(pid, "Gid:", gid);
755 char *strnappend(const char *s, const char *suffix, size_t b) {
763 return strndup(suffix, b);
772 if (b > ((size_t) -1) - a)
775 r = new(char, a+b+1);
780 memcpy(r+a, suffix, b);
786 char *strappend(const char *s, const char *suffix) {
787 return strnappend(s, suffix, suffix ? strlen(suffix) : 0);
790 int readlink_malloc(const char *p, char **ret) {
805 n = readlink(p, c, l-1);
812 if ((size_t) n < l-1) {
823 int readlink_and_make_absolute(const char *p, char **r) {
824 _cleanup_free_ char *target = NULL;
831 j = readlink_malloc(p, &target);
835 k = file_in_same_dir(p, target);
843 int readlink_and_canonicalize(const char *p, char **r) {
850 j = readlink_and_make_absolute(p, &t);
854 s = canonicalize_file_name(t);
861 path_kill_slashes(*r);
866 int reset_all_signal_handlers(void) {
869 for (sig = 1; sig < _NSIG; sig++) {
870 struct sigaction sa = {
871 .sa_handler = SIG_DFL,
872 .sa_flags = SA_RESTART,
875 if (sig == SIGKILL || sig == SIGSTOP)
878 /* On Linux the first two RT signals are reserved by
879 * glibc, and sigaction() will return EINVAL for them. */
880 if ((sigaction(sig, &sa, NULL) < 0))
888 char *strstrip(char *s) {
891 /* Drops trailing whitespace. Modifies the string in
892 * place. Returns pointer to first non-space character */
894 s += strspn(s, WHITESPACE);
896 for (e = strchr(s, 0); e > s; e --)
897 if (!strchr(WHITESPACE, e[-1]))
905 char *delete_chars(char *s, const char *bad) {
908 /* Drops all whitespace, regardless where in the string */
910 for (f = s, t = s; *f; f++) {
922 bool in_charset(const char *s, const char* charset) {
929 if (!strchr(charset, *i))
935 char *file_in_same_dir(const char *path, const char *filename) {
942 /* This removes the last component of path and appends
943 * filename, unless the latter is absolute anyway or the
946 if (path_is_absolute(filename))
947 return strdup(filename);
949 if (!(e = strrchr(path, '/')))
950 return strdup(filename);
952 k = strlen(filename);
953 if (!(r = new(char, e-path+1+k+1)))
956 memcpy(r, path, e-path+1);
957 memcpy(r+(e-path)+1, filename, k+1);
962 int rmdir_parents(const char *path, const char *stop) {
971 /* Skip trailing slashes */
972 while (l > 0 && path[l-1] == '/')
978 /* Skip last component */
979 while (l > 0 && path[l-1] != '/')
982 /* Skip trailing slashes */
983 while (l > 0 && path[l-1] == '/')
989 if (!(t = strndup(path, l)))
992 if (path_startswith(stop, t)) {
1001 if (errno != ENOENT)
1008 char hexchar(int x) {
1009 static const char table[16] = "0123456789abcdef";
1011 return table[x & 15];
1014 int unhexchar(char c) {
1016 if (c >= '0' && c <= '9')
1019 if (c >= 'a' && c <= 'f')
1020 return c - 'a' + 10;
1022 if (c >= 'A' && c <= 'F')
1023 return c - 'A' + 10;
1028 char *hexmem(const void *p, size_t l) {
1032 z = r = malloc(l * 2 + 1);
1036 for (x = p; x < (const uint8_t*) p + l; x++) {
1037 *(z++) = hexchar(*x >> 4);
1038 *(z++) = hexchar(*x & 15);
1045 void *unhexmem(const char *p, size_t l) {
1051 z = r = malloc((l + 1) / 2 + 1);
1055 for (x = p; x < p + l; x += 2) {
1058 a = unhexchar(x[0]);
1060 b = unhexchar(x[1]);
1064 *(z++) = (uint8_t) a << 4 | (uint8_t) b;
1071 char octchar(int x) {
1072 return '0' + (x & 7);
1075 int unoctchar(char c) {
1077 if (c >= '0' && c <= '7')
1083 char decchar(int x) {
1084 return '0' + (x % 10);
1087 int undecchar(char c) {
1089 if (c >= '0' && c <= '9')
1095 char *cescape(const char *s) {
1101 /* Does C style string escaping. */
1103 r = new(char, strlen(s)*4 + 1);
1107 for (f = s, t = r; *f; f++)
1153 /* For special chars we prefer octal over
1154 * hexadecimal encoding, simply because glib's
1155 * g_strescape() does the same */
1156 if ((*f < ' ') || (*f >= 127)) {
1158 *(t++) = octchar((unsigned char) *f >> 6);
1159 *(t++) = octchar((unsigned char) *f >> 3);
1160 *(t++) = octchar((unsigned char) *f);
1171 char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) {
1178 /* Undoes C style string escaping, and optionally prefixes it. */
1180 pl = prefix ? strlen(prefix) : 0;
1182 r = new(char, pl+length+1);
1187 memcpy(r, prefix, pl);
1189 for (f = s, t = r + pl; f < s + length; f++) {
1232 /* This is an extension of the XDG syntax files */
1237 /* hexadecimal encoding */
1240 a = unhexchar(f[1]);
1241 b = unhexchar(f[2]);
1243 if (a < 0 || b < 0) {
1244 /* Invalid escape code, let's take it literal then */
1248 *(t++) = (char) ((a << 4) | b);
1263 /* octal encoding */
1266 a = unoctchar(f[0]);
1267 b = unoctchar(f[1]);
1268 c = unoctchar(f[2]);
1270 if (a < 0 || b < 0 || c < 0) {
1271 /* Invalid escape code, let's take it literal then */
1275 *(t++) = (char) ((a << 6) | (b << 3) | c);
1283 /* premature end of string.*/
1288 /* Invalid escape code, let's take it literal then */
1300 char *cunescape_length(const char *s, size_t length) {
1301 return cunescape_length_with_prefix(s, length, NULL);
1304 char *cunescape(const char *s) {
1307 return cunescape_length(s, strlen(s));
1310 char *xescape(const char *s, const char *bad) {
1314 /* Escapes all chars in bad, in addition to \ and all special
1315 * chars, in \xFF style escaping. May be reversed with
1318 r = new(char, strlen(s) * 4 + 1);
1322 for (f = s, t = r; *f; f++) {
1324 if ((*f < ' ') || (*f >= 127) ||
1325 (*f == '\\') || strchr(bad, *f)) {
1328 *(t++) = hexchar(*f >> 4);
1329 *(t++) = hexchar(*f);
1339 char *ascii_strlower(char *t) {
1344 for (p = t; *p; p++)
1345 if (*p >= 'A' && *p <= 'Z')
1346 *p = *p - 'A' + 'a';
1351 _pure_ static bool ignore_file_allow_backup(const char *filename) {
1355 filename[0] == '.' ||
1356 streq(filename, "lost+found") ||
1357 streq(filename, "aquota.user") ||
1358 streq(filename, "aquota.group") ||
1359 endswith(filename, ".rpmnew") ||
1360 endswith(filename, ".rpmsave") ||
1361 endswith(filename, ".rpmorig") ||
1362 endswith(filename, ".dpkg-old") ||
1363 endswith(filename, ".dpkg-new") ||
1364 endswith(filename, ".swp");
1367 bool ignore_file(const char *filename) {
1370 if (endswith(filename, "~"))
1373 return ignore_file_allow_backup(filename);
1376 int fd_nonblock(int fd, bool nonblock) {
1381 if ((flags = fcntl(fd, F_GETFL, 0)) < 0)
1385 flags |= O_NONBLOCK;
1387 flags &= ~O_NONBLOCK;
1389 if (fcntl(fd, F_SETFL, flags) < 0)
1395 int fd_cloexec(int fd, bool cloexec) {
1400 if ((flags = fcntl(fd, F_GETFD, 0)) < 0)
1404 flags |= FD_CLOEXEC;
1406 flags &= ~FD_CLOEXEC;
1408 if (fcntl(fd, F_SETFD, flags) < 0)
1414 _pure_ static bool fd_in_set(int fd, const int fdset[], unsigned n_fdset) {
1417 assert(n_fdset == 0 || fdset);
1419 for (i = 0; i < n_fdset; i++)
1426 int close_all_fds(const int except[], unsigned n_except) {
1431 assert(n_except == 0 || except);
1433 d = opendir("/proc/self/fd");
1438 /* When /proc isn't available (for example in chroots)
1439 * the fallback is brute forcing through the fd
1442 assert_se(getrlimit(RLIMIT_NOFILE, &rl) >= 0);
1443 for (fd = 3; fd < (int) rl.rlim_max; fd ++) {
1445 if (fd_in_set(fd, except, n_except))
1448 if (close_nointr(fd) < 0)
1449 if (errno != EBADF && r == 0)
1456 while ((de = readdir(d))) {
1459 if (ignore_file(de->d_name))
1462 if (safe_atoi(de->d_name, &fd) < 0)
1463 /* Let's better ignore this, just in case */
1472 if (fd_in_set(fd, except, n_except))
1475 if (close_nointr(fd) < 0) {
1476 /* Valgrind has its own FD and doesn't want to have it closed */
1477 if (errno != EBADF && r == 0)
1486 bool chars_intersect(const char *a, const char *b) {
1489 /* Returns true if any of the chars in a are in b. */
1490 for (p = a; *p; p++)
1497 bool fstype_is_network(const char *fstype) {
1498 static const char table[] =
1508 return nulstr_contains(table, fstype);
1512 _cleanup_close_ int fd;
1514 fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC);
1520 TIOCL_GETKMSGREDIRECT,
1524 if (ioctl(fd, TIOCLINUX, tiocl) < 0)
1527 vt = tiocl[0] <= 0 ? 1 : tiocl[0];
1530 if (ioctl(fd, VT_ACTIVATE, vt) < 0)
1536 int read_one_char(FILE *f, char *ret, usec_t t, bool *need_nl) {
1537 struct termios old_termios, new_termios;
1539 char line[LINE_MAX];
1544 if (tcgetattr(fileno(f), &old_termios) >= 0) {
1545 new_termios = old_termios;
1547 new_termios.c_lflag &= ~ICANON;
1548 new_termios.c_cc[VMIN] = 1;
1549 new_termios.c_cc[VTIME] = 0;
1551 if (tcsetattr(fileno(f), TCSADRAIN, &new_termios) >= 0) {
1554 if (t != (usec_t) -1) {
1555 if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0) {
1556 tcsetattr(fileno(f), TCSADRAIN, &old_termios);
1561 k = fread(&c, 1, 1, f);
1563 tcsetattr(fileno(f), TCSADRAIN, &old_termios);
1569 *need_nl = c != '\n';
1576 if (t != (usec_t) -1)
1577 if (fd_wait_for_event(fileno(f), POLLIN, t) <= 0)
1580 if (!fgets(line, sizeof(line), f))
1585 if (strlen(line) != 1)
1595 int ask(char *ret, const char *replies, const char *text, ...) {
1605 bool need_nl = true;
1608 fputs(ANSI_HIGHLIGHT_ON, stdout);
1615 fputs(ANSI_HIGHLIGHT_OFF, stdout);
1619 r = read_one_char(stdin, &c, (usec_t) -1, &need_nl);
1622 if (r == -EBADMSG) {
1623 puts("Bad input, please try again.");
1634 if (strchr(replies, c)) {
1639 puts("Read unexpected character, please try again.");
1643 int reset_terminal_fd(int fd, bool switch_to_text) {
1644 struct termios termios;
1647 /* Set terminal to some sane defaults */
1651 /* We leave locked terminal attributes untouched, so that
1652 * Plymouth may set whatever it wants to set, and we don't
1653 * interfere with that. */
1655 /* Disable exclusive mode, just in case */
1656 ioctl(fd, TIOCNXCL);
1658 /* Switch to text mode */
1660 ioctl(fd, KDSETMODE, KD_TEXT);
1662 /* Enable console unicode mode */
1663 ioctl(fd, KDSKBMODE, K_UNICODE);
1665 if (tcgetattr(fd, &termios) < 0) {
1670 /* We only reset the stuff that matters to the software. How
1671 * hardware is set up we don't touch assuming that somebody
1672 * else will do that for us */
1674 termios.c_iflag &= ~(IGNBRK | BRKINT | ISTRIP | INLCR | IGNCR | IUCLC);
1675 termios.c_iflag |= ICRNL | IMAXBEL | IUTF8;
1676 termios.c_oflag |= ONLCR;
1677 termios.c_cflag |= CREAD;
1678 termios.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOPRT | ECHOKE;
1680 termios.c_cc[VINTR] = 03; /* ^C */
1681 termios.c_cc[VQUIT] = 034; /* ^\ */
1682 termios.c_cc[VERASE] = 0177;
1683 termios.c_cc[VKILL] = 025; /* ^X */
1684 termios.c_cc[VEOF] = 04; /* ^D */
1685 termios.c_cc[VSTART] = 021; /* ^Q */
1686 termios.c_cc[VSTOP] = 023; /* ^S */
1687 termios.c_cc[VSUSP] = 032; /* ^Z */
1688 termios.c_cc[VLNEXT] = 026; /* ^V */
1689 termios.c_cc[VWERASE] = 027; /* ^W */
1690 termios.c_cc[VREPRINT] = 022; /* ^R */
1691 termios.c_cc[VEOL] = 0;
1692 termios.c_cc[VEOL2] = 0;
1694 termios.c_cc[VTIME] = 0;
1695 termios.c_cc[VMIN] = 1;
1697 if (tcsetattr(fd, TCSANOW, &termios) < 0)
1701 /* Just in case, flush all crap out */
1702 tcflush(fd, TCIOFLUSH);
1707 int reset_terminal(const char *name) {
1710 fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
1714 r = reset_terminal_fd(fd, true);
1715 close_nointr_nofail(fd);
1720 int open_terminal(const char *name, int mode) {
1725 * If a TTY is in the process of being closed opening it might
1726 * cause EIO. This is horribly awful, but unlikely to be
1727 * changed in the kernel. Hence we work around this problem by
1728 * retrying a couple of times.
1730 * https://bugs.launchpad.net/ubuntu/+source/linux/+bug/554172/comments/245
1733 assert(!(mode & O_CREAT));
1736 fd = open(name, mode, 0);
1743 /* Max 1s in total */
1747 usleep(50 * USEC_PER_MSEC);
1756 close_nointr_nofail(fd);
1761 close_nointr_nofail(fd);
1768 int flush_fd(int fd) {
1769 struct pollfd pollfd = {
1779 r = poll(&pollfd, 1, 0);
1789 l = read(fd, buf, sizeof(buf));
1795 if (errno == EAGAIN)
1804 int acquire_terminal(
1808 bool ignore_tiocstty_eperm,
1811 int fd = -1, notify = -1, r = 0, wd = -1;
1816 /* We use inotify to be notified when the tty is closed. We
1817 * create the watch before checking if we can actually acquire
1818 * it, so that we don't lose any event.
1820 * Note: strictly speaking this actually watches for the
1821 * device being closed, it does *not* really watch whether a
1822 * tty loses its controlling process. However, unless some
1823 * rogue process uses TIOCNOTTY on /dev/tty *after* closing
1824 * its tty otherwise this will not become a problem. As long
1825 * as the administrator makes sure not configure any service
1826 * on the same tty as an untrusted user this should not be a
1827 * problem. (Which he probably should not do anyway.) */
1829 if (timeout != (usec_t) -1)
1830 ts = now(CLOCK_MONOTONIC);
1832 if (!fail && !force) {
1833 notify = inotify_init1(IN_CLOEXEC | (timeout != (usec_t) -1 ? IN_NONBLOCK : 0));
1839 wd = inotify_add_watch(notify, name, IN_CLOSE);
1847 struct sigaction sa_old, sa_new = {
1848 .sa_handler = SIG_IGN,
1849 .sa_flags = SA_RESTART,
1853 r = flush_fd(notify);
1858 /* We pass here O_NOCTTY only so that we can check the return
1859 * value TIOCSCTTY and have a reliable way to figure out if we
1860 * successfully became the controlling process of the tty */
1861 fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
1865 /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed
1866 * if we already own the tty. */
1867 assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0);
1869 /* First, try to get the tty */
1870 if (ioctl(fd, TIOCSCTTY, force) < 0)
1873 assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0);
1875 /* Sometimes it makes sense to ignore TIOCSCTTY
1876 * returning EPERM, i.e. when very likely we already
1877 * are have this controlling terminal. */
1878 if (r < 0 && r == -EPERM && ignore_tiocstty_eperm)
1881 if (r < 0 && (force || fail || r != -EPERM)) {
1890 assert(notify >= 0);
1893 uint8_t inotify_buffer[sizeof(struct inotify_event) + FILENAME_MAX];
1895 struct inotify_event *e;
1897 if (timeout != (usec_t) -1) {
1900 n = now(CLOCK_MONOTONIC);
1901 if (ts + timeout < n) {
1906 r = fd_wait_for_event(fd, POLLIN, ts + timeout - n);
1916 l = read(notify, inotify_buffer, sizeof(inotify_buffer));
1919 if (errno == EINTR || errno == EAGAIN)
1926 e = (struct inotify_event*) inotify_buffer;
1931 if (e->wd != wd || !(e->mask & IN_CLOSE)) {
1936 step = sizeof(struct inotify_event) + e->len;
1937 assert(step <= (size_t) l);
1939 e = (struct inotify_event*) ((uint8_t*) e + step);
1946 /* We close the tty fd here since if the old session
1947 * ended our handle will be dead. It's important that
1948 * we do this after sleeping, so that we don't enter
1949 * an endless loop. */
1950 close_nointr_nofail(fd);
1954 close_nointr_nofail(notify);
1956 r = reset_terminal_fd(fd, true);
1958 log_warning("Failed to reset terminal: %s", strerror(-r));
1964 close_nointr_nofail(fd);
1967 close_nointr_nofail(notify);
1972 int release_terminal(void) {
1974 struct sigaction sa_old, sa_new = {
1975 .sa_handler = SIG_IGN,
1976 .sa_flags = SA_RESTART,
1978 _cleanup_close_ int fd;
1980 fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_NDELAY|O_CLOEXEC);
1984 /* Temporarily ignore SIGHUP, so that we don't get SIGHUP'ed
1985 * by our own TIOCNOTTY */
1986 assert_se(sigaction(SIGHUP, &sa_new, &sa_old) == 0);
1988 if (ioctl(fd, TIOCNOTTY) < 0)
1991 assert_se(sigaction(SIGHUP, &sa_old, NULL) == 0);
1996 int sigaction_many(const struct sigaction *sa, ...) {
2001 while ((sig = va_arg(ap, int)) > 0)
2002 if (sigaction(sig, sa, NULL) < 0)
2009 int ignore_signals(int sig, ...) {
2010 struct sigaction sa = {
2011 .sa_handler = SIG_IGN,
2012 .sa_flags = SA_RESTART,
2018 if (sigaction(sig, &sa, NULL) < 0)
2022 while ((sig = va_arg(ap, int)) > 0)
2023 if (sigaction(sig, &sa, NULL) < 0)
2030 int default_signals(int sig, ...) {
2031 struct sigaction sa = {
2032 .sa_handler = SIG_DFL,
2033 .sa_flags = SA_RESTART,
2038 if (sigaction(sig, &sa, NULL) < 0)
2042 while ((sig = va_arg(ap, int)) > 0)
2043 if (sigaction(sig, &sa, NULL) < 0)
2050 int close_pipe(int p[]) {
2056 a = close_nointr(p[0]);
2061 b = close_nointr(p[1]);
2065 return a < 0 ? a : b;
2068 ssize_t loop_read(int fd, void *buf, size_t nbytes, bool do_poll) {
2075 while (nbytes > 0) {
2078 k = read(fd, p, nbytes);
2079 if (k < 0 && errno == EINTR)
2082 if (k < 0 && errno == EAGAIN && do_poll) {
2084 /* We knowingly ignore any return value here,
2085 * and expect that any error/EOF is reported
2088 fd_wait_for_event(fd, POLLIN, (usec_t) -1);
2093 return n > 0 ? n : (k < 0 ? -errno : 0);
2103 ssize_t loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) {
2104 const uint8_t *p = buf;
2110 while (nbytes > 0) {
2113 k = write(fd, p, nbytes);
2114 if (k < 0 && errno == EINTR)
2117 if (k < 0 && errno == EAGAIN && do_poll) {
2119 /* We knowingly ignore any return value here,
2120 * and expect that any error/EOF is reported
2123 fd_wait_for_event(fd, POLLOUT, (usec_t) -1);
2128 return n > 0 ? n : (k < 0 ? -errno : 0);
2138 int parse_size(const char *t, off_t base, off_t *size) {
2140 /* Soo, sometimes we want to parse IEC binary suffxies, and
2141 * sometimes SI decimal suffixes. This function can parse
2142 * both. Which one is the right way depends on the
2143 * context. Wikipedia suggests that SI is customary for
2144 * hardrware metrics and network speeds, while IEC is
2145 * customary for most data sizes used by software and volatile
2146 * (RAM) memory. Hence be careful which one you pick!
2148 * In either case we use just K, M, G as suffix, and not Ki,
2149 * Mi, Gi or so (as IEC would suggest). That's because that's
2150 * frickin' ugly. But this means you really need to make sure
2151 * to document which base you are parsing when you use this
2156 unsigned long long factor;
2159 static const struct table iec[] = {
2160 { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL },
2161 { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL },
2162 { "T", 1024ULL*1024ULL*1024ULL*1024ULL },
2163 { "G", 1024ULL*1024ULL*1024ULL },
2164 { "M", 1024ULL*1024ULL },
2170 static const struct table si[] = {
2171 { "E", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL*1000ULL },
2172 { "P", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL },
2173 { "T", 1000ULL*1000ULL*1000ULL*1000ULL },
2174 { "G", 1000ULL*1000ULL*1000ULL },
2175 { "M", 1000ULL*1000ULL },
2181 const struct table *table;
2183 unsigned long long r = 0;
2184 unsigned n_entries, start_pos = 0;
2187 assert(base == 1000 || base == 1024);
2192 n_entries = ELEMENTSOF(si);
2195 n_entries = ELEMENTSOF(iec);
2201 unsigned long long l2;
2207 l = strtoll(p, &e, 10);
2220 if (*e >= '0' && *e <= '9') {
2223 /* strotoull itself would accept space/+/- */
2224 l2 = strtoull(e, &e2, 10);
2226 if (errno == ERANGE)
2229 /* Ignore failure. E.g. 10.M is valid */
2236 e += strspn(e, WHITESPACE);
2238 for (i = start_pos; i < n_entries; i++)
2239 if (startswith(e, table[i].suffix)) {
2240 unsigned long long tmp;
2241 if ((unsigned long long) l + (frac > 0) > ULLONG_MAX / table[i].factor)
2243 tmp = l * table[i].factor + (unsigned long long) (frac * table[i].factor);
2244 if (tmp > ULLONG_MAX - r)
2248 if ((unsigned long long) (off_t) r != r)
2251 p = e + strlen(table[i].suffix);
2267 int make_stdio(int fd) {
2272 r = dup3(fd, STDIN_FILENO, 0);
2273 s = dup3(fd, STDOUT_FILENO, 0);
2274 t = dup3(fd, STDERR_FILENO, 0);
2277 close_nointr_nofail(fd);
2279 if (r < 0 || s < 0 || t < 0)
2282 /* We rely here that the new fd has O_CLOEXEC not set */
2287 int make_null_stdio(void) {
2290 null_fd = open("/dev/null", O_RDWR|O_NOCTTY);
2294 return make_stdio(null_fd);
2297 bool is_device_path(const char *path) {
2299 /* Returns true on paths that refer to a device, either in
2300 * sysfs or in /dev */
2303 path_startswith(path, "/dev/") ||
2304 path_startswith(path, "/sys/");
2307 int dir_is_empty(const char *path) {
2308 _cleanup_closedir_ DIR *d;
2319 if (!de && errno != 0)
2325 if (!ignore_file(de->d_name))
2330 char* dirname_malloc(const char *path) {
2331 char *d, *dir, *dir2;
2348 int dev_urandom(void *p, size_t n) {
2349 _cleanup_close_ int fd;
2352 fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY);
2354 return errno == ENOENT ? -ENOSYS : -errno;
2356 k = loop_read(fd, p, n, true);
2359 if ((size_t) k != n)
2365 void random_bytes(void *p, size_t n) {
2366 static bool srand_called = false;
2370 r = dev_urandom(p, n);
2374 /* If some idiot made /dev/urandom unavailable to us, he'll
2375 * get a PRNG instead. */
2377 if (!srand_called) {
2380 #ifdef HAVE_SYS_AUXV_H
2381 /* The kernel provides us with a bit of entropy in
2382 * auxv, so let's try to make use of that to seed the
2383 * pseudo-random generator. It's better than
2388 auxv = (void*) getauxval(AT_RANDOM);
2390 x ^= *(unsigned*) auxv;
2393 x ^= (unsigned) now(CLOCK_REALTIME);
2394 x ^= (unsigned) gettid();
2397 srand_called = true;
2400 for (q = p; q < (uint8_t*) p + n; q ++)
2404 void rename_process(const char name[8]) {
2407 /* This is a like a poor man's setproctitle(). It changes the
2408 * comm field, argv[0], and also the glibc's internally used
2409 * name of the process. For the first one a limit of 16 chars
2410 * applies, to the second one usually one of 10 (i.e. length
2411 * of "/sbin/init"), to the third one one of 7 (i.e. length of
2412 * "systemd"). If you pass a longer string it will be
2415 prctl(PR_SET_NAME, name);
2417 if (program_invocation_name)
2418 strncpy(program_invocation_name, name, strlen(program_invocation_name));
2420 if (saved_argc > 0) {
2424 strncpy(saved_argv[0], name, strlen(saved_argv[0]));
2426 for (i = 1; i < saved_argc; i++) {
2430 memzero(saved_argv[i], strlen(saved_argv[i]));
2435 void sigset_add_many(sigset_t *ss, ...) {
2442 while ((sig = va_arg(ap, int)) > 0)
2443 assert_se(sigaddset(ss, sig) == 0);
2447 char* gethostname_malloc(void) {
2450 assert_se(uname(&u) >= 0);
2452 if (!isempty(u.nodename) && !streq(u.nodename, "(none)"))
2453 return strdup(u.nodename);
2455 return strdup(u.sysname);
2458 bool hostname_is_set(void) {
2461 assert_se(uname(&u) >= 0);
2463 return !isempty(u.nodename) && !streq(u.nodename, "(none)");
2466 static char *lookup_uid(uid_t uid) {
2469 _cleanup_free_ char *buf = NULL;
2470 struct passwd pwbuf, *pw = NULL;
2472 /* Shortcut things to avoid NSS lookups */
2474 return strdup("root");
2476 bufsize = sysconf(_SC_GETPW_R_SIZE_MAX);
2480 buf = malloc(bufsize);
2484 if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw)
2485 return strdup(pw->pw_name);
2487 if (asprintf(&name, "%lu", (unsigned long) uid) < 0)
2493 char* getlogname_malloc(void) {
2497 if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0)
2502 return lookup_uid(uid);
2505 char *getusername_malloc(void) {
2512 return lookup_uid(getuid());
2515 int getttyname_malloc(int fd, char **r) {
2516 char path[PATH_MAX], *c;
2521 k = ttyname_r(fd, path, sizeof(path));
2527 c = strdup(startswith(path, "/dev/") ? path + 5 : path);
2535 int getttyname_harder(int fd, char **r) {
2539 k = getttyname_malloc(fd, &s);
2543 if (streq(s, "tty")) {
2545 return get_ctty(0, NULL, r);
2552 int get_ctty_devnr(pid_t pid, dev_t *d) {
2554 _cleanup_free_ char *line = NULL;
2556 unsigned long ttynr;
2560 p = procfs_file_alloca(pid, "stat");
2561 r = read_one_line_file(p, &line);
2565 p = strrchr(line, ')');
2575 "%*d " /* session */
2580 if (major(ttynr) == 0 && minor(ttynr) == 0)
2589 int get_ctty(pid_t pid, dev_t *_devnr, char **r) {
2590 char fn[sizeof("/dev/char/")-1 + 2*DECIMAL_STR_MAX(unsigned) + 1 + 1], *b = NULL;
2591 _cleanup_free_ char *s = NULL;
2598 k = get_ctty_devnr(pid, &devnr);
2602 snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr));
2604 k = readlink_malloc(fn, &s);
2610 /* This is an ugly hack */
2611 if (major(devnr) == 136) {
2612 asprintf(&b, "pts/%lu", (unsigned long) minor(devnr));
2616 /* Probably something like the ptys which have no
2617 * symlink in /dev/char. Let's return something
2618 * vaguely useful. */
2624 if (startswith(s, "/dev/"))
2626 else if (startswith(s, "../"))
2644 int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) {
2650 /* This returns the first error we run into, but nevertheless
2651 * tries to go on. This closes the passed fd. */
2655 close_nointr_nofail(fd);
2657 return errno == ENOENT ? 0 : -errno;
2662 bool is_dir, keep_around;
2668 if (!de && errno != 0) {
2677 if (streq(de->d_name, ".") || streq(de->d_name, ".."))
2680 if (de->d_type == DT_UNKNOWN ||
2682 (de->d_type == DT_DIR && root_dev)) {
2683 if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
2684 if (ret == 0 && errno != ENOENT)
2689 is_dir = S_ISDIR(st.st_mode);
2692 (st.st_uid == 0 || st.st_uid == getuid()) &&
2693 (st.st_mode & S_ISVTX);
2695 is_dir = de->d_type == DT_DIR;
2696 keep_around = false;
2702 /* if root_dev is set, remove subdirectories only, if device is same as dir */
2703 if (root_dev && st.st_dev != root_dev->st_dev)
2706 subdir_fd = openat(fd, de->d_name,
2707 O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME);
2708 if (subdir_fd < 0) {
2709 if (ret == 0 && errno != ENOENT)
2714 r = rm_rf_children_dangerous(subdir_fd, only_dirs, honour_sticky, root_dev);
2715 if (r < 0 && ret == 0)
2719 if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) {
2720 if (ret == 0 && errno != ENOENT)
2724 } else if (!only_dirs && !keep_around) {
2726 if (unlinkat(fd, de->d_name, 0) < 0) {
2727 if (ret == 0 && errno != ENOENT)
2738 _pure_ static int is_temporary_fs(struct statfs *s) {
2741 return F_TYPE_EQUAL(s->f_type, TMPFS_MAGIC) ||
2742 F_TYPE_EQUAL(s->f_type, RAMFS_MAGIC);
2745 int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) {
2750 if (fstatfs(fd, &s) < 0) {
2751 close_nointr_nofail(fd);
2755 /* We refuse to clean disk file systems with this call. This
2756 * is extra paranoia just to be sure we never ever remove
2758 if (!is_temporary_fs(&s)) {
2759 log_error("Attempted to remove disk file system, and we can't allow that.");
2760 close_nointr_nofail(fd);
2764 return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev);
2767 static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) {
2773 /* We refuse to clean the root file system with this
2774 * call. This is extra paranoia to never cause a really
2775 * seriously broken system. */
2776 if (path_equal(path, "/")) {
2777 log_error("Attempted to remove entire root file system, and we can't allow that.");
2781 fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME);
2784 if (errno != ENOTDIR)
2788 if (statfs(path, &s) < 0)
2791 if (!is_temporary_fs(&s)) {
2792 log_error("Attempted to remove disk file system, and we can't allow that.");
2797 if (delete_root && !only_dirs)
2798 if (unlink(path) < 0 && errno != ENOENT)
2805 if (fstatfs(fd, &s) < 0) {
2806 close_nointr_nofail(fd);
2810 if (!is_temporary_fs(&s)) {
2811 log_error("Attempted to remove disk file system, and we can't allow that.");
2812 close_nointr_nofail(fd);
2817 r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL);
2820 if (honour_sticky && file_is_priv_sticky(path) > 0)
2823 if (rmdir(path) < 0 && errno != ENOENT) {
2832 int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) {
2833 return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false);
2836 int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) {
2837 return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true);
2840 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) {
2843 /* Under the assumption that we are running privileged we
2844 * first change the access mode and only then hand out
2845 * ownership to avoid a window where access is too open. */
2847 if (mode != (mode_t) -1)
2848 if (chmod(path, mode) < 0)
2851 if (uid != (uid_t) -1 || gid != (gid_t) -1)
2852 if (chown(path, uid, gid) < 0)
2858 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) {
2861 /* Under the assumption that we are running privileged we
2862 * first change the access mode and only then hand out
2863 * ownership to avoid a window where access is too open. */
2865 if (mode != (mode_t) -1)
2866 if (fchmod(fd, mode) < 0)
2869 if (uid != (uid_t) -1 || gid != (gid_t) -1)
2870 if (fchown(fd, uid, gid) < 0)
2876 cpu_set_t* cpu_set_malloc(unsigned *ncpus) {
2880 /* Allocates the cpuset in the right size */
2883 if (!(r = CPU_ALLOC(n)))
2886 if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) {
2887 CPU_ZERO_S(CPU_ALLOC_SIZE(n), r);
2897 if (errno != EINVAL)
2904 int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) {
2905 static const char status_indent[] = " "; /* "[" STATUS "] " */
2906 _cleanup_free_ char *s = NULL;
2907 _cleanup_close_ int fd = -1;
2908 struct iovec iovec[6] = {};
2910 static bool prev_ephemeral;
2914 /* This is independent of logging, as status messages are
2915 * optional and go exclusively to the console. */
2917 if (vasprintf(&s, format, ap) < 0)
2920 fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
2933 sl = status ? sizeof(status_indent)-1 : 0;
2939 e = ellipsize(s, emax, 75);
2947 IOVEC_SET_STRING(iovec[n++], "\r" ANSI_ERASE_TO_END_OF_LINE);
2948 prev_ephemeral = ephemeral;
2951 if (!isempty(status)) {
2952 IOVEC_SET_STRING(iovec[n++], "[");
2953 IOVEC_SET_STRING(iovec[n++], status);
2954 IOVEC_SET_STRING(iovec[n++], "] ");
2956 IOVEC_SET_STRING(iovec[n++], status_indent);
2959 IOVEC_SET_STRING(iovec[n++], s);
2961 IOVEC_SET_STRING(iovec[n++], "\n");
2963 if (writev(fd, iovec, n) < 0)
2969 int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) {
2975 va_start(ap, format);
2976 r = status_vprintf(status, ellipse, ephemeral, format, ap);
2982 char *replace_env(const char *format, char **env) {
2989 const char *e, *word = format;
2994 for (e = format; *e; e ++) {
3005 if (!(k = strnappend(r, word, e-word-1)))
3014 } else if (*e == '$') {
3015 if (!(k = strnappend(r, word, e-word)))
3031 t = strempty(strv_env_get_n(env, word+2, e-word-2));
3033 k = strappend(r, t);
3047 if (!(k = strnappend(r, word, e-word)))
3058 char **replace_env_argv(char **argv, char **env) {
3060 unsigned k = 0, l = 0;
3062 l = strv_length(argv);
3064 if (!(r = new(char*, l+1)))
3067 STRV_FOREACH(i, argv) {
3069 /* If $FOO appears as single word, replace it by the split up variable */
3070 if ((*i)[0] == '$' && (*i)[1] != '{') {
3075 e = strv_env_get(env, *i+1);
3078 if (!(m = strv_split_quoted(e))) {
3089 if (!(w = realloc(r, sizeof(char*) * (l+1)))) {
3098 memcpy(r + k, m, q * sizeof(char*));
3106 /* If ${FOO} appears as part of a word, replace it by the variable as-is */
3107 if (!(r[k++] = replace_env(*i, env))) {
3117 int fd_columns(int fd) {
3118 struct winsize ws = {};
3120 if (ioctl(fd, TIOCGWINSZ, &ws) < 0)
3129 unsigned columns(void) {
3133 if (_likely_(cached_columns > 0))
3134 return cached_columns;
3137 e = getenv("COLUMNS");
3142 c = fd_columns(STDOUT_FILENO);
3151 int fd_lines(int fd) {
3152 struct winsize ws = {};
3154 if (ioctl(fd, TIOCGWINSZ, &ws) < 0)
3163 unsigned lines(void) {
3167 if (_likely_(cached_lines > 0))
3168 return cached_lines;
3171 e = getenv("LINES");
3176 l = fd_lines(STDOUT_FILENO);
3182 return cached_lines;
3185 /* intended to be used as a SIGWINCH sighandler */
3186 void columns_lines_cache_reset(int signum) {
3192 static int cached_on_tty = -1;
3194 if (_unlikely_(cached_on_tty < 0))
3195 cached_on_tty = isatty(STDOUT_FILENO) > 0;
3197 return cached_on_tty;
3200 int running_in_chroot(void) {
3201 struct stat a = {}, b = {};
3203 /* Only works as root */
3204 if (stat("/proc/1/root", &a) < 0)
3207 if (stat("/", &b) < 0)
3211 a.st_dev != b.st_dev ||
3212 a.st_ino != b.st_ino;
3215 static char *ascii_ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) {
3220 assert(percent <= 100);
3221 assert(new_length >= 3);
3223 if (old_length <= 3 || old_length <= new_length)
3224 return strndup(s, old_length);
3226 r = new0(char, new_length+1);
3230 x = (new_length * percent) / 100;
3232 if (x > new_length - 3)
3240 s + old_length - (new_length - x - 3),
3241 new_length - x - 3);
3246 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) {
3250 unsigned k, len, len2;
3253 assert(percent <= 100);
3254 assert(new_length >= 3);
3256 /* if no multibyte characters use ascii_ellipsize_mem for speed */
3257 if (ascii_is_valid(s))
3258 return ascii_ellipsize_mem(s, old_length, new_length, percent);
3260 if (old_length <= 3 || old_length <= new_length)
3261 return strndup(s, old_length);
3263 x = (new_length * percent) / 100;
3265 if (x > new_length - 3)
3269 for (i = s; k < x && i < s + old_length; i = utf8_next_char(i)) {
3272 c = utf8_encoded_to_unichar(i);
3275 k += unichar_iswide(c) ? 2 : 1;
3278 if (k > x) /* last character was wide and went over quota */
3281 for (j = s + old_length; k < new_length && j > i; ) {
3284 j = utf8_prev_char(j);
3285 c = utf8_encoded_to_unichar(j);
3288 k += unichar_iswide(c) ? 2 : 1;
3292 /* we don't actually need to ellipsize */
3294 return memdup(s, old_length + 1);
3296 /* make space for ellipsis */
3297 j = utf8_next_char(j);
3300 len2 = s + old_length - j;
3301 e = new(char, len + 3 + len2 + 1);
3306 printf("old_length=%zu new_length=%zu x=%zu len=%u len2=%u k=%u\n",
3307 old_length, new_length, x, len, len2, k);
3311 e[len] = 0xe2; /* tri-dot ellipsis: … */
3315 memcpy(e + len + 3, j, len2 + 1);
3320 char *ellipsize(const char *s, size_t length, unsigned percent) {
3321 return ellipsize_mem(s, strlen(s), length, percent);
3324 int touch(const char *path) {
3329 /* This just opens the file for writing, ensuring it
3330 * exists. It doesn't call utimensat() the way /usr/bin/touch
3333 fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644);
3337 close_nointr_nofail(fd);
3341 char *unquote(const char *s, const char* quotes) {
3345 /* This is rather stupid, simply removes the heading and
3346 * trailing quotes if there is one. Doesn't care about
3347 * escaping or anything. We should make this smarter one
3354 if (strchr(quotes, s[0]) && s[l-1] == s[0])
3355 return strndup(s+1, l-2);
3360 char *normalize_env_assignment(const char *s) {
3361 _cleanup_free_ char *name = NULL, *value = NULL, *p = NULL;
3364 eq = strchr(s, '=');
3376 memmove(r, t, strlen(t) + 1);
3380 name = strndup(s, eq - s);
3388 value = unquote(strstrip(p), QUOTES);
3392 if (asprintf(&r, "%s=%s", strstrip(name), value) < 0)
3398 int wait_for_terminate(pid_t pid, siginfo_t *status) {
3409 if (waitid(P_PID, pid, status, WEXITED) < 0) {
3421 int wait_for_terminate_and_warn(const char *name, pid_t pid) {
3428 r = wait_for_terminate(pid, &status);
3430 log_warning("Failed to wait for %s: %s", name, strerror(-r));
3434 if (status.si_code == CLD_EXITED) {
3435 if (status.si_status != 0) {
3436 log_warning("%s failed with error code %i.", name, status.si_status);
3437 return status.si_status;
3440 log_debug("%s succeeded.", name);
3443 } else if (status.si_code == CLD_KILLED ||
3444 status.si_code == CLD_DUMPED) {
3446 log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status));
3450 log_warning("%s failed due to unknown reason.", name);
3454 noreturn void freeze(void) {
3456 /* Make sure nobody waits for us on a socket anymore */
3457 close_all_fds(NULL, 0);
3465 bool null_or_empty(struct stat *st) {
3468 if (S_ISREG(st->st_mode) && st->st_size <= 0)
3471 if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode))
3477 int null_or_empty_path(const char *fn) {
3482 if (stat(fn, &st) < 0)
3485 return null_or_empty(&st);
3488 DIR *xopendirat(int fd, const char *name, int flags) {
3492 assert(!(flags & O_CREAT));
3494 nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags, 0);
3500 close_nointr_nofail(nfd);
3507 int signal_from_string_try_harder(const char *s) {
3511 signo = signal_from_string(s);
3513 if (startswith(s, "SIG"))
3514 return signal_from_string(s+3);
3519 static char *tag_to_udev_node(const char *tagvalue, const char *by) {
3520 _cleanup_free_ char *t = NULL, *u = NULL;
3524 u = unquote(tagvalue, "\"\'");
3528 enc_len = strlen(u) * 4 + 1;
3529 t = new(char, enc_len);
3533 if (encode_devnode_name(u, t, enc_len) < 0)
3536 if (asprintf(&dn, "/dev/disk/by-%s/%s", by, t) < 0)
3542 char *fstab_node_to_udev_node(const char *p) {
3545 if (startswith(p, "LABEL="))
3546 return tag_to_udev_node(p+6, "label");
3548 if (startswith(p, "UUID="))
3549 return tag_to_udev_node(p+5, "uuid");
3551 if (startswith(p, "PARTUUID="))
3552 return tag_to_udev_node(p+9, "partuuid");
3554 if (startswith(p, "PARTLABEL="))
3555 return tag_to_udev_node(p+10, "partlabel");
3560 bool tty_is_vc(const char *tty) {
3563 if (startswith(tty, "/dev/"))
3566 return vtnr_from_tty(tty) >= 0;
3569 bool tty_is_console(const char *tty) {
3572 if (startswith(tty, "/dev/"))
3575 return streq(tty, "console");
3578 int vtnr_from_tty(const char *tty) {
3583 if (startswith(tty, "/dev/"))
3586 if (!startswith(tty, "tty") )
3589 if (tty[3] < '0' || tty[3] > '9')
3592 r = safe_atoi(tty+3, &i);
3596 if (i < 0 || i > 63)
3602 char *resolve_dev_console(char **active) {
3605 /* Resolve where /dev/console is pointing to, if /sys is actually ours
3606 * (i.e. not read-only-mounted which is a sign for container setups) */
3608 if (path_is_read_only_fs("/sys") > 0)
3611 if (read_one_line_file("/sys/class/tty/console/active", active) < 0)
3614 /* If multiple log outputs are configured the last one is what
3615 * /dev/console points to */
3616 tty = strrchr(*active, ' ');
3622 if (streq(tty, "tty0")) {
3625 /* Get the active VC (e.g. tty1) */
3626 if (read_one_line_file("/sys/class/tty/tty0/active", &tmp) >= 0) {
3628 tty = *active = tmp;
3635 bool tty_is_vc_resolve(const char *tty) {
3636 _cleanup_free_ char *active = NULL;
3640 if (startswith(tty, "/dev/"))
3643 if (streq(tty, "console")) {
3644 tty = resolve_dev_console(&active);
3649 return tty_is_vc(tty);
3652 const char *default_term_for_tty(const char *tty) {
3655 return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt102";
3658 bool dirent_is_file(const struct dirent *de) {
3661 if (ignore_file(de->d_name))
3664 if (de->d_type != DT_REG &&
3665 de->d_type != DT_LNK &&
3666 de->d_type != DT_UNKNOWN)
3672 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) {
3675 if (de->d_type != DT_REG &&
3676 de->d_type != DT_LNK &&
3677 de->d_type != DT_UNKNOWN)
3680 if (ignore_file_allow_backup(de->d_name))
3683 return endswith(de->d_name, suffix);
3686 void execute_directory(const char *directory, DIR *d, char *argv[]) {
3689 Hashmap *pids = NULL;
3693 /* Executes all binaries in a directory in parallel and
3694 * waits for them to finish. */
3697 if (!(_d = opendir(directory))) {
3699 if (errno == ENOENT)
3702 log_error("Failed to enumerate directory %s: %m", directory);
3709 if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) {
3710 log_error("Failed to allocate set.");
3714 while ((de = readdir(d))) {
3719 if (!dirent_is_file(de))
3722 if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) {
3727 if ((pid = fork()) < 0) {
3728 log_error("Failed to fork: %m");
3746 log_error("Failed to execute %s: %m", path);
3747 _exit(EXIT_FAILURE);
3750 log_debug("Spawned %s as %lu", path, (unsigned long) pid);
3752 if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) {
3753 log_error("Failed to add PID to set: %s", strerror(-k));
3758 while (!hashmap_isempty(pids)) {
3759 pid_t pid = PTR_TO_UINT(hashmap_first_key(pids));
3763 if (waitid(P_PID, pid, &si, WEXITED) < 0) {
3768 log_error("waitid() failed: %m");
3772 if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) {
3773 if (!is_clean_exit(si.si_code, si.si_status, NULL)) {
3774 if (si.si_code == CLD_EXITED)
3775 log_error("%s exited with exit status %i.", path, si.si_status);
3777 log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status));
3779 log_debug("%s exited successfully.", path);
3790 hashmap_free_free(pids);
3793 int kill_and_sigcont(pid_t pid, int sig) {
3796 r = kill(pid, sig) < 0 ? -errno : 0;
3804 bool nulstr_contains(const char*nulstr, const char *needle) {
3810 NULSTR_FOREACH(i, nulstr)
3811 if (streq(i, needle))
3817 bool plymouth_running(void) {
3818 return access("/run/plymouth/pid", F_OK) >= 0;
3821 char* strshorten(char *s, size_t l) {
3830 static bool hostname_valid_char(char c) {
3832 (c >= 'a' && c <= 'z') ||
3833 (c >= 'A' && c <= 'Z') ||
3834 (c >= '0' && c <= '9') ||
3840 bool hostname_is_valid(const char *s) {
3847 for (p = s, dot = true; *p; p++) {
3854 if (!hostname_valid_char(*p))
3864 if (p-s > HOST_NAME_MAX)
3870 char* hostname_cleanup(char *s, bool lowercase) {
3874 for (p = s, d = s, dot = true; *p; p++) {
3881 } else if (hostname_valid_char(*p)) {
3882 *(d++) = lowercase ? tolower(*p) : *p;
3893 strshorten(s, HOST_NAME_MAX);
3898 int pipe_eof(int fd) {
3899 struct pollfd pollfd = {
3901 .events = POLLIN|POLLHUP,
3906 r = poll(&pollfd, 1, 0);
3913 return pollfd.revents & POLLHUP;
3916 int fd_wait_for_event(int fd, int event, usec_t t) {
3918 struct pollfd pollfd = {
3926 r = ppoll(&pollfd, 1, t == (usec_t) -1 ? NULL : timespec_store(&ts, t), NULL);
3933 return pollfd.revents;
3936 int fopen_temporary(const char *path, FILE **_f, char **_temp_path) {
3947 t = new(char, strlen(path) + 1 + 6 + 1);
3951 fn = basename(path);
3955 stpcpy(stpcpy(t+k+1, fn), "XXXXXX");
3957 fd = mkostemp_safe(t, O_WRONLY|O_CLOEXEC);
3963 f = fdopen(fd, "we");
3976 int terminal_vhangup_fd(int fd) {
3979 if (ioctl(fd, TIOCVHANGUP) < 0)
3985 int terminal_vhangup(const char *name) {
3988 fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
3992 r = terminal_vhangup_fd(fd);
3993 close_nointr_nofail(fd);
3998 int vt_disallocate(const char *name) {
4002 /* Deallocate the VT if possible. If not possible
4003 * (i.e. because it is the active one), at least clear it
4004 * entirely (including the scrollback buffer) */
4006 if (!startswith(name, "/dev/"))
4009 if (!tty_is_vc(name)) {
4010 /* So this is not a VT. I guess we cannot deallocate
4011 * it then. But let's at least clear the screen */
4013 fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
4018 "\033[r" /* clear scrolling region */
4019 "\033[H" /* move home */
4020 "\033[2J", /* clear screen */
4022 close_nointr_nofail(fd);
4027 if (!startswith(name, "/dev/tty"))
4030 r = safe_atou(name+8, &u);
4037 /* Try to deallocate */
4038 fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC);
4042 r = ioctl(fd, VT_DISALLOCATE, u);
4043 close_nointr_nofail(fd);
4051 /* Couldn't deallocate, so let's clear it fully with
4053 fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
4058 "\033[r" /* clear scrolling region */
4059 "\033[H" /* move home */
4060 "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */
4062 close_nointr_nofail(fd);
4067 int copy_file(const char *from, const char *to, int flags) {
4068 _cleanup_close_ int fdf = -1;
4074 fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY);
4078 fdt = open(to, flags|O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644);
4086 n = read(fdf, buf, sizeof(buf));
4100 k = loop_write(fdt, buf, n, false);
4102 r = k < 0 ? k : (errno ? -errno : -EIO);
4111 r = close_nointr(fdt);
4121 int symlink_atomic(const char *from, const char *to) {
4123 _cleanup_free_ char *t;
4133 t = new(char, strlen(to) + 1 + 16 + 1);
4141 x = stpcpy(t+k+1, fn);
4144 for (i = 0; i < 16; i++) {
4145 *(x++) = hexchar(u & 0xF);
4151 if (symlink(from, t) < 0)
4154 if (rename(t, to) < 0) {
4163 bool display_is_local(const char *display) {
4167 display[0] == ':' &&
4168 display[1] >= '0' &&
4172 int socket_from_display(const char *display, char **path) {
4179 if (!display_is_local(display))
4182 k = strspn(display+1, "0123456789");
4184 f = new(char, sizeof("/tmp/.X11-unix/X") + k);
4188 c = stpcpy(f, "/tmp/.X11-unix/X");
4189 memcpy(c, display+1, k);
4198 const char **username,
4199 uid_t *uid, gid_t *gid,
4201 const char **shell) {
4209 /* We enforce some special rules for uid=0: in order to avoid
4210 * NSS lookups for root we hardcode its data. */
4212 if (streq(*username, "root") || streq(*username, "0")) {
4230 if (parse_uid(*username, &u) >= 0) {
4234 /* If there are multiple users with the same id, make
4235 * sure to leave $USER to the configured value instead
4236 * of the first occurrence in the database. However if
4237 * the uid was configured by a numeric uid, then let's
4238 * pick the real username from /etc/passwd. */
4240 *username = p->pw_name;
4243 p = getpwnam(*username);
4247 return errno > 0 ? -errno : -ESRCH;
4259 *shell = p->pw_shell;
4264 char* uid_to_name(uid_t uid) {
4269 return strdup("root");
4273 return strdup(p->pw_name);
4275 if (asprintf(&r, "%lu", (unsigned long) uid) < 0)
4281 char* gid_to_name(gid_t gid) {
4286 return strdup("root");
4290 return strdup(p->gr_name);
4292 if (asprintf(&r, "%lu", (unsigned long) gid) < 0)
4298 int get_group_creds(const char **groupname, gid_t *gid) {
4304 /* We enforce some special rules for gid=0: in order to avoid
4305 * NSS lookups for root we hardcode its data. */
4307 if (streq(*groupname, "root") || streq(*groupname, "0")) {
4308 *groupname = "root";
4316 if (parse_gid(*groupname, &id) >= 0) {
4321 *groupname = g->gr_name;
4324 g = getgrnam(*groupname);
4328 return errno > 0 ? -errno : -ESRCH;
4336 int in_gid(gid_t gid) {
4338 int ngroups_max, r, i;
4340 if (getgid() == gid)
4343 if (getegid() == gid)
4346 ngroups_max = sysconf(_SC_NGROUPS_MAX);
4347 assert(ngroups_max > 0);
4349 gids = alloca(sizeof(gid_t) * ngroups_max);
4351 r = getgroups(ngroups_max, gids);
4355 for (i = 0; i < r; i++)
4362 int in_group(const char *name) {
4366 r = get_group_creds(&name, &gid);
4373 int glob_exists(const char *path) {
4374 _cleanup_globfree_ glob_t g = {};
4380 k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g);
4382 if (k == GLOB_NOMATCH)
4384 else if (k == GLOB_NOSPACE)
4387 return !strv_isempty(g.gl_pathv);
4389 return errno ? -errno : -EIO;
4392 int glob_extend(char ***strv, const char *path) {
4393 _cleanup_globfree_ glob_t g = {};
4398 k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g);
4400 if (k == GLOB_NOMATCH)
4402 else if (k == GLOB_NOSPACE)
4404 else if (k != 0 || strv_isempty(g.gl_pathv))
4405 return errno ? -errno : -EIO;
4407 STRV_FOREACH(p, g.gl_pathv) {
4408 k = strv_extend(strv, *p);
4416 int dirent_ensure_type(DIR *d, struct dirent *de) {
4422 if (de->d_type != DT_UNKNOWN)
4425 if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0)
4429 S_ISREG(st.st_mode) ? DT_REG :
4430 S_ISDIR(st.st_mode) ? DT_DIR :
4431 S_ISLNK(st.st_mode) ? DT_LNK :
4432 S_ISFIFO(st.st_mode) ? DT_FIFO :
4433 S_ISSOCK(st.st_mode) ? DT_SOCK :
4434 S_ISCHR(st.st_mode) ? DT_CHR :
4435 S_ISBLK(st.st_mode) ? DT_BLK :
4441 int in_search_path(const char *path, char **search) {
4443 _cleanup_free_ char *parent = NULL;
4446 r = path_get_parent(path, &parent);
4450 STRV_FOREACH(i, search)
4451 if (path_equal(parent, *i))
4457 int get_files_in_directory(const char *path, char ***list) {
4458 _cleanup_closedir_ DIR *d = NULL;
4459 size_t bufsize = 0, n = 0;
4460 _cleanup_strv_free_ char **l = NULL;
4464 /* Returns all files in a directory in *list, and the number
4465 * of files as return value. If list is NULL returns only the
4477 if (!de && errno != 0)
4482 dirent_ensure_type(d, de);
4484 if (!dirent_is_file(de))
4488 /* one extra slot is needed for the terminating NULL */
4489 if (!GREEDY_REALLOC(l, bufsize, n + 2))
4492 l[n] = strdup(de->d_name);
4503 l = NULL; /* avoid freeing */
4509 char *strjoin(const char *x, ...) {
4523 t = va_arg(ap, const char *);
4528 if (n > ((size_t) -1) - l) {
4552 t = va_arg(ap, const char *);
4566 bool is_main_thread(void) {
4567 static thread_local int cached = 0;
4569 if (_unlikely_(cached == 0))
4570 cached = getpid() == gettid() ? 1 : -1;
4575 int block_get_whole_disk(dev_t d, dev_t *ret) {
4582 /* If it has a queue this is good enough for us */
4583 if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0)
4586 r = access(p, F_OK);
4594 /* If it is a partition find the originating device */
4595 if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0)
4598 r = access(p, F_OK);
4604 /* Get parent dev_t */
4605 if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0)
4608 r = read_one_line_file(p, &s);
4614 r = sscanf(s, "%u:%u", &m, &n);
4620 /* Only return this if it is really good enough for us. */
4621 if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0)
4624 r = access(p, F_OK);
4628 *ret = makedev(m, n);
4635 int file_is_priv_sticky(const char *p) {
4640 if (lstat(p, &st) < 0)
4644 (st.st_uid == 0 || st.st_uid == getuid()) &&
4645 (st.st_mode & S_ISVTX);
4648 static const char *const ioprio_class_table[] = {
4649 [IOPRIO_CLASS_NONE] = "none",
4650 [IOPRIO_CLASS_RT] = "realtime",
4651 [IOPRIO_CLASS_BE] = "best-effort",
4652 [IOPRIO_CLASS_IDLE] = "idle"
4655 DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, INT_MAX);
4657 static const char *const sigchld_code_table[] = {
4658 [CLD_EXITED] = "exited",
4659 [CLD_KILLED] = "killed",
4660 [CLD_DUMPED] = "dumped",
4661 [CLD_TRAPPED] = "trapped",
4662 [CLD_STOPPED] = "stopped",
4663 [CLD_CONTINUED] = "continued",
4666 DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int);
4668 static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = {
4669 [LOG_FAC(LOG_KERN)] = "kern",
4670 [LOG_FAC(LOG_USER)] = "user",
4671 [LOG_FAC(LOG_MAIL)] = "mail",
4672 [LOG_FAC(LOG_DAEMON)] = "daemon",
4673 [LOG_FAC(LOG_AUTH)] = "auth",
4674 [LOG_FAC(LOG_SYSLOG)] = "syslog",
4675 [LOG_FAC(LOG_LPR)] = "lpr",
4676 [LOG_FAC(LOG_NEWS)] = "news",
4677 [LOG_FAC(LOG_UUCP)] = "uucp",
4678 [LOG_FAC(LOG_CRON)] = "cron",
4679 [LOG_FAC(LOG_AUTHPRIV)] = "authpriv",
4680 [LOG_FAC(LOG_FTP)] = "ftp",
4681 [LOG_FAC(LOG_LOCAL0)] = "local0",
4682 [LOG_FAC(LOG_LOCAL1)] = "local1",
4683 [LOG_FAC(LOG_LOCAL2)] = "local2",
4684 [LOG_FAC(LOG_LOCAL3)] = "local3",
4685 [LOG_FAC(LOG_LOCAL4)] = "local4",
4686 [LOG_FAC(LOG_LOCAL5)] = "local5",
4687 [LOG_FAC(LOG_LOCAL6)] = "local6",
4688 [LOG_FAC(LOG_LOCAL7)] = "local7"
4691 DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0));
4693 static const char *const log_level_table[] = {
4694 [LOG_EMERG] = "emerg",
4695 [LOG_ALERT] = "alert",
4696 [LOG_CRIT] = "crit",
4698 [LOG_WARNING] = "warning",
4699 [LOG_NOTICE] = "notice",
4700 [LOG_INFO] = "info",
4701 [LOG_DEBUG] = "debug"
4704 DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG);
4706 static const char* const sched_policy_table[] = {
4707 [SCHED_OTHER] = "other",
4708 [SCHED_BATCH] = "batch",
4709 [SCHED_IDLE] = "idle",
4710 [SCHED_FIFO] = "fifo",
4714 DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX);
4716 static const char* const rlimit_table[] = {
4717 [RLIMIT_CPU] = "LimitCPU",
4718 [RLIMIT_FSIZE] = "LimitFSIZE",
4719 [RLIMIT_DATA] = "LimitDATA",
4720 [RLIMIT_STACK] = "LimitSTACK",
4721 [RLIMIT_CORE] = "LimitCORE",
4722 [RLIMIT_RSS] = "LimitRSS",
4723 [RLIMIT_NOFILE] = "LimitNOFILE",
4724 [RLIMIT_AS] = "LimitAS",
4725 [RLIMIT_NPROC] = "LimitNPROC",
4726 [RLIMIT_MEMLOCK] = "LimitMEMLOCK",
4727 [RLIMIT_LOCKS] = "LimitLOCKS",
4728 [RLIMIT_SIGPENDING] = "LimitSIGPENDING",
4729 [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE",
4730 [RLIMIT_NICE] = "LimitNICE",
4731 [RLIMIT_RTPRIO] = "LimitRTPRIO",
4732 [RLIMIT_RTTIME] = "LimitRTTIME"
4735 DEFINE_STRING_TABLE_LOOKUP(rlimit, int);
4737 static const char* const ip_tos_table[] = {
4738 [IPTOS_LOWDELAY] = "low-delay",
4739 [IPTOS_THROUGHPUT] = "throughput",
4740 [IPTOS_RELIABILITY] = "reliability",
4741 [IPTOS_LOWCOST] = "low-cost",
4744 DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ip_tos, int, 0xff);
4746 static const char *const __signal_table[] = {
4763 [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */
4774 [SIGVTALRM] = "VTALRM",
4776 [SIGWINCH] = "WINCH",
4782 DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int);
4784 const char *signal_to_string(int signo) {
4785 static thread_local char buf[sizeof("RTMIN+")-1 + DECIMAL_STR_MAX(int) + 1];
4788 name = __signal_to_string(signo);
4792 if (signo >= SIGRTMIN && signo <= SIGRTMAX)
4793 snprintf(buf, sizeof(buf), "RTMIN+%d", signo - SIGRTMIN);
4795 snprintf(buf, sizeof(buf), "%d", signo);
4800 int signal_from_string(const char *s) {
4805 signo = __signal_from_string(s);
4809 if (startswith(s, "RTMIN+")) {
4813 if (safe_atou(s, &u) >= 0) {
4814 signo = (int) u + offset;
4815 if (signo > 0 && signo < _NSIG)
4821 bool kexec_loaded(void) {
4822 bool loaded = false;
4825 if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) {
4833 int strdup_or_null(const char *a, char **b) {
4851 int prot_from_flags(int flags) {
4853 switch (flags & O_ACCMODE) {
4862 return PROT_READ|PROT_WRITE;
4869 char *format_bytes(char *buf, size_t l, off_t t) {
4872 static const struct {
4876 { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL },
4877 { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL },
4878 { "T", 1024ULL*1024ULL*1024ULL*1024ULL },
4879 { "G", 1024ULL*1024ULL*1024ULL },
4880 { "M", 1024ULL*1024ULL },
4884 for (i = 0; i < ELEMENTSOF(table); i++) {
4886 if (t >= table[i].factor) {
4889 (unsigned long long) (t / table[i].factor),
4890 (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL),
4897 snprintf(buf, l, "%lluB", (unsigned long long) t);
4905 void* memdup(const void *p, size_t l) {
4918 int fd_inc_sndbuf(int fd, size_t n) {
4920 socklen_t l = sizeof(value);
4922 r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l);
4923 if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2)
4926 /* If we have the privileges we will ignore the kernel limit. */
4929 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0)
4930 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0)
4936 int fd_inc_rcvbuf(int fd, size_t n) {
4938 socklen_t l = sizeof(value);
4940 r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l);
4941 if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2)
4944 /* If we have the privileges we will ignore the kernel limit. */
4947 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0)
4948 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0)
4953 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) {
4954 pid_t parent_pid, agent_pid;
4956 bool stdout_is_tty, stderr_is_tty;
4964 parent_pid = getpid();
4966 /* Spawns a temporary TTY agent, making sure it goes away when
4973 if (agent_pid != 0) {
4980 * Make sure the agent goes away when the parent dies */
4981 if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0)
4982 _exit(EXIT_FAILURE);
4984 /* Check whether our parent died before we were able
4985 * to set the death signal */
4986 if (getppid() != parent_pid)
4987 _exit(EXIT_SUCCESS);
4989 /* Don't leak fds to the agent */
4990 close_all_fds(except, n_except);
4992 stdout_is_tty = isatty(STDOUT_FILENO);
4993 stderr_is_tty = isatty(STDERR_FILENO);
4995 if (!stdout_is_tty || !stderr_is_tty) {
4996 /* Detach from stdout/stderr. and reopen
4997 * /dev/tty for them. This is important to
4998 * ensure that when systemctl is started via
4999 * popen() or a similar call that expects to
5000 * read EOF we actually do generate EOF and
5001 * not delay this indefinitely by because we
5002 * keep an unused copy of stdin around. */
5003 fd = open("/dev/tty", O_WRONLY);
5005 log_error("Failed to open /dev/tty: %m");
5006 _exit(EXIT_FAILURE);
5010 dup2(fd, STDOUT_FILENO);
5013 dup2(fd, STDERR_FILENO);
5019 /* Count arguments */
5021 for (n = 0; va_arg(ap, char*); n++)
5026 l = alloca(sizeof(char *) * (n + 1));
5028 /* Fill in arguments */
5030 for (i = 0; i <= n; i++)
5031 l[i] = va_arg(ap, char*);
5035 _exit(EXIT_FAILURE);
5038 int setrlimit_closest(int resource, const struct rlimit *rlim) {
5039 struct rlimit highest, fixed;
5043 if (setrlimit(resource, rlim) >= 0)
5049 /* So we failed to set the desired setrlimit, then let's try
5050 * to get as close as we can */
5051 assert_se(getrlimit(resource, &highest) == 0);
5053 fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max);
5054 fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max);
5056 if (setrlimit(resource, &fixed) < 0)
5062 int getenv_for_pid(pid_t pid, const char *field, char **_value) {
5063 _cleanup_fclose_ FILE *f = NULL;
5074 path = procfs_file_alloca(pid, "environ");
5076 f = fopen(path, "re");
5084 char line[LINE_MAX];
5087 for (i = 0; i < sizeof(line)-1; i++) {
5091 if (_unlikely_(c == EOF)) {
5101 if (memcmp(line, field, l) == 0 && line[l] == '=') {
5102 value = strdup(line + l + 1);
5116 bool is_valid_documentation_url(const char *url) {
5119 if (startswith(url, "http://") && url[7])
5122 if (startswith(url, "https://") && url[8])
5125 if (startswith(url, "file:") && url[5])
5128 if (startswith(url, "info:") && url[5])
5131 if (startswith(url, "man:") && url[4])
5137 bool in_initrd(void) {
5138 static int saved = -1;
5144 /* We make two checks here:
5146 * 1. the flag file /etc/initrd-release must exist
5147 * 2. the root file system must be a memory file system
5149 * The second check is extra paranoia, since misdetecting an
5150 * initrd can have bad bad consequences due the initrd
5151 * emptying when transititioning to the main systemd.
5154 saved = access("/etc/initrd-release", F_OK) >= 0 &&
5155 statfs("/", &s) >= 0 &&
5156 is_temporary_fs(&s);
5161 void warn_melody(void) {
5162 _cleanup_close_ int fd = -1;
5164 fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY);
5168 /* Yeah, this is synchronous. Kinda sucks. But well... */
5170 ioctl(fd, KIOCSOUND, (int)(1193180/440));
5171 usleep(125*USEC_PER_MSEC);
5173 ioctl(fd, KIOCSOUND, (int)(1193180/220));
5174 usleep(125*USEC_PER_MSEC);
5176 ioctl(fd, KIOCSOUND, (int)(1193180/220));
5177 usleep(125*USEC_PER_MSEC);
5179 ioctl(fd, KIOCSOUND, 0);
5182 int make_console_stdio(void) {
5185 /* Make /dev/console the controlling terminal and stdin/stdout/stderr */
5187 fd = acquire_terminal("/dev/console", false, true, true, (usec_t) -1);
5189 log_error("Failed to acquire terminal: %s", strerror(-fd));
5195 log_error("Failed to duplicate terminal fd: %s", strerror(-r));
5202 int get_home_dir(char **_h) {
5210 /* Take the user specified one */
5221 /* Hardcode home directory for root to avoid NSS */
5224 h = strdup("/root");
5232 /* Check the database... */
5236 return errno > 0 ? -errno : -ESRCH;
5238 if (!path_is_absolute(p->pw_dir))
5241 h = strdup(p->pw_dir);
5249 int get_shell(char **_s) {
5257 /* Take the user specified one */
5258 e = getenv("SHELL");
5268 /* Hardcode home directory for root to avoid NSS */
5271 s = strdup("/bin/sh");
5279 /* Check the database... */
5283 return errno > 0 ? -errno : -ESRCH;
5285 if (!path_is_absolute(p->pw_shell))
5288 s = strdup(p->pw_shell);
5296 bool filename_is_safe(const char *p) {
5310 if (strlen(p) > FILENAME_MAX)
5316 bool string_is_safe(const char *p) {
5321 for (t = p; *t; t++) {
5322 if (*t > 0 && *t < ' ')
5325 if (strchr("\\\"\'", *t))
5333 * Check if a string contains control characters.
5334 * Spaces and tabs are not considered control characters.
5336 bool string_has_cc(const char *p) {
5341 for (t = p; *t; t++)
5342 if (*t > 0 && *t < ' ' && *t != '\t')
5348 bool path_is_safe(const char *p) {
5353 if (streq(p, "..") || startswith(p, "../") || endswith(p, "/..") || strstr(p, "/../"))
5356 if (strlen(p) > PATH_MAX)
5359 /* The following two checks are not really dangerous, but hey, they still are confusing */
5360 if (streq(p, ".") || startswith(p, "./") || endswith(p, "/.") || strstr(p, "/./"))
5363 if (strstr(p, "//"))
5369 /* hey glibc, APIs with callbacks without a user pointer are so useless */
5370 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
5371 int (*compar) (const void *, const void *, void *), void *arg) {
5380 p = (void *)(((const char *) base) + (idx * size));
5381 comparison = compar(key, p, arg);
5384 else if (comparison > 0)
5392 bool is_locale_utf8(void) {
5394 static int cached_answer = -1;
5396 if (cached_answer >= 0)
5399 if (!setlocale(LC_ALL, "")) {
5400 cached_answer = true;
5404 set = nl_langinfo(CODESET);
5406 cached_answer = true;
5410 if (streq(set, "UTF-8")) {
5411 cached_answer = true;
5415 /* For LC_CTYPE=="C" return true, because CTYPE is effectly
5416 * unset and everything can do to UTF-8 nowadays. */
5417 set = setlocale(LC_CTYPE, NULL);
5419 cached_answer = true;
5423 /* Check result, but ignore the result if C was set
5427 !getenv("LC_ALL") &&
5428 !getenv("LC_CTYPE") &&
5432 return (bool) cached_answer;
5435 const char *draw_special_char(DrawSpecialChar ch) {
5436 static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = {
5438 [DRAW_TREE_VERT] = "\342\224\202 ", /* │ */
5439 [DRAW_TREE_BRANCH] = "\342\224\234\342\224\200", /* ├─ */
5440 [DRAW_TREE_RIGHT] = "\342\224\224\342\224\200", /* └─ */
5441 [DRAW_TREE_SPACE] = " ", /* */
5442 [DRAW_TRIANGULAR_BULLET] = "\342\200\243 ", /* ‣ */
5443 [DRAW_BLACK_CIRCLE] = "\342\227\217 ", /* ● */
5445 /* ASCII fallback */ {
5446 [DRAW_TREE_VERT] = "| ",
5447 [DRAW_TREE_BRANCH] = "|-",
5448 [DRAW_TREE_RIGHT] = "`-",
5449 [DRAW_TREE_SPACE] = " ",
5450 [DRAW_TRIANGULAR_BULLET] = "> ",
5451 [DRAW_BLACK_CIRCLE] = "* ",
5455 return draw_table[!is_locale_utf8()][ch];
5458 char *strreplace(const char *text, const char *old_string, const char *new_string) {
5461 size_t l, old_len, new_len;
5467 old_len = strlen(old_string);
5468 new_len = strlen(new_string);
5481 if (!startswith(f, old_string)) {
5487 nl = l - old_len + new_len;
5488 a = realloc(r, nl + 1);
5496 t = stpcpy(t, new_string);
5508 char *strip_tab_ansi(char **ibuf, size_t *_isz) {
5509 const char *i, *begin = NULL;
5514 } state = STATE_OTHER;
5516 size_t osz = 0, isz;
5522 /* Strips ANSI color and replaces TABs by 8 spaces */
5524 isz = _isz ? *_isz : strlen(*ibuf);
5526 f = open_memstream(&obuf, &osz);
5530 for (i = *ibuf; i < *ibuf + isz + 1; i++) {
5535 if (i >= *ibuf + isz) /* EOT */
5537 else if (*i == '\x1B')
5538 state = STATE_ESCAPE;
5539 else if (*i == '\t')
5546 if (i >= *ibuf + isz) { /* EOT */
5549 } else if (*i == '[') {
5550 state = STATE_BRACKET;
5555 state = STATE_OTHER;
5562 if (i >= *ibuf + isz || /* EOT */
5563 (!(*i >= '0' && *i <= '9') && *i != ';' && *i != 'm')) {
5566 state = STATE_OTHER;
5568 } else if (*i == 'm')
5569 state = STATE_OTHER;
5591 int on_ac_power(void) {
5592 bool found_offline = false, found_online = false;
5593 _cleanup_closedir_ DIR *d = NULL;
5595 d = opendir("/sys/class/power_supply");
5601 _cleanup_close_ int fd = -1, device = -1;
5607 if (!de && errno != 0)
5613 if (ignore_file(de->d_name))
5616 device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY);
5618 if (errno == ENOENT || errno == ENOTDIR)
5624 fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY);
5626 if (errno == ENOENT)
5632 n = read(fd, contents, sizeof(contents));
5636 if (n != 6 || memcmp(contents, "Mains\n", 6))
5639 close_nointr_nofail(fd);
5640 fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY);
5642 if (errno == ENOENT)
5648 n = read(fd, contents, sizeof(contents));
5652 if (n != 2 || contents[1] != '\n')
5655 if (contents[0] == '1') {
5656 found_online = true;
5658 } else if (contents[0] == '0')
5659 found_offline = true;
5664 return found_online || !found_offline;
5667 static int search_and_fopen_internal(const char *path, const char *mode, char **search, FILE **_f) {
5674 if (!path_strv_canonicalize_absolute_uniq(search, NULL))
5677 STRV_FOREACH(i, search) {
5678 _cleanup_free_ char *p = NULL;
5681 p = strjoin(*i, "/", path, NULL);
5691 if (errno != ENOENT)
5698 int search_and_fopen(const char *path, const char *mode, const char **search, FILE **_f) {
5699 _cleanup_strv_free_ char **copy = NULL;
5705 if (path_is_absolute(path)) {
5708 f = fopen(path, mode);
5717 copy = strv_copy((char**) search);
5721 return search_and_fopen_internal(path, mode, copy, _f);
5724 int search_and_fopen_nulstr(const char *path, const char *mode, const char *search, FILE **_f) {
5725 _cleanup_strv_free_ char **s = NULL;
5727 if (path_is_absolute(path)) {
5730 f = fopen(path, mode);
5739 s = strv_split_nulstr(search);
5743 return search_and_fopen_internal(path, mode, s, _f);
5746 char *strextend(char **x, ...) {
5753 l = f = *x ? strlen(*x) : 0;
5760 t = va_arg(ap, const char *);
5765 if (n > ((size_t) -1) - l) {
5774 r = realloc(*x, l+1);
5784 t = va_arg(ap, const char *);
5798 char *strrep(const char *s, unsigned n) {
5806 p = r = malloc(l * n + 1);
5810 for (i = 0; i < n; i++)
5817 void* greedy_realloc(void **p, size_t *allocated, size_t need) {
5824 if (*allocated >= need)
5827 a = MAX(64u, need * 2);
5829 /* check for overflows */
5842 void* greedy_realloc0(void **p, size_t *allocated, size_t need) {
5851 q = greedy_realloc(p, allocated, need);
5855 if (*allocated > prev)
5856 memzero(&q[prev], *allocated - prev);
5861 bool id128_is_valid(const char *s) {
5867 /* Simple formatted 128bit hex string */
5869 for (i = 0; i < l; i++) {
5872 if (!(c >= '0' && c <= '9') &&
5873 !(c >= 'a' && c <= 'z') &&
5874 !(c >= 'A' && c <= 'Z'))
5878 } else if (l == 36) {
5880 /* Formatted UUID */
5882 for (i = 0; i < l; i++) {
5885 if ((i == 8 || i == 13 || i == 18 || i == 23)) {
5889 if (!(c >= '0' && c <= '9') &&
5890 !(c >= 'a' && c <= 'z') &&
5891 !(c >= 'A' && c <= 'Z'))
5902 int split_pair(const char *s, const char *sep, char **l, char **r) {
5917 a = strndup(s, x - s);
5921 b = strdup(x + strlen(sep));
5933 int shall_restore_state(void) {
5934 _cleanup_free_ char *line;
5939 r = proc_cmdline(&line);
5942 if (r == 0) /* Container ... */
5945 FOREACH_WORD_QUOTED(w, l, line, state)
5946 if (l == 23 && strneq(w, "systemd.restore_state=0", 23))
5952 int proc_cmdline(char **ret) {
5955 if (detect_container(NULL) > 0) {
5956 char *buf = NULL, *p;
5959 r = read_full_file("/proc/1/cmdline", &buf, &sz);
5963 for (p = buf; p + 1 < buf + sz; p++)
5972 r = read_one_line_file("/proc/cmdline", ret);
5979 int parse_proc_cmdline(int (*parse_word)(const char *word)) {
5980 _cleanup_free_ char *line = NULL;
5985 r = proc_cmdline(&line);
5987 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
5991 FOREACH_WORD_QUOTED(w, l, line, state) {
5992 _cleanup_free_ char *word;
5994 word = strndup(w, l);
5998 r = parse_word(word);
6000 log_error("Failed on cmdline argument %s: %s", word, strerror(-r));
6008 int container_get_leader(const char *machine, pid_t *pid) {
6009 _cleanup_free_ char *s = NULL, *class = NULL;
6017 p = strappenda("/run/systemd/machines/", machine);
6018 r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL);
6026 if (!streq_ptr(class, "container"))
6029 r = parse_pid(s, &leader);
6039 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *root_fd) {
6040 _cleanup_close_ int pidnsfd = -1, mntnsfd = -1;
6041 const char *pidns, *mntns, *root;
6049 mntns = procfs_file_alloca(pid, "ns/mnt");
6050 mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
6054 pidns = procfs_file_alloca(pid, "ns/pid");
6055 pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
6059 root = procfs_file_alloca(pid, "root");
6060 rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY);
6064 *pidns_fd = pidnsfd;
6065 *mntns_fd = mntnsfd;
6073 int namespace_enter(int pidns_fd, int mntns_fd, int root_fd) {
6074 assert(pidns_fd >= 0);
6075 assert(mntns_fd >= 0);
6076 assert(root_fd >= 0);
6078 if (setns(pidns_fd, CLONE_NEWPID) < 0)
6081 if (setns(mntns_fd, CLONE_NEWNS) < 0)
6084 if (fchdir(root_fd) < 0)
6087 if (chroot(".") < 0)
6090 if (setresgid(0, 0, 0) < 0)
6093 if (setresuid(0, 0, 0) < 0)
6099 bool pid_is_unwaited(pid_t pid) {
6100 /* Checks whether a PID is still valid at all, including a zombie */
6105 if (kill(pid, 0) >= 0)
6108 return errno != ESRCH;
6111 bool pid_is_alive(pid_t pid) {
6114 /* Checks whether a PID is still valid and not a zombie */
6119 r = get_process_state(pid);
6120 if (r == -ENOENT || r == 'Z')
6126 int getpeercred(int fd, struct ucred *ucred) {
6127 socklen_t n = sizeof(struct ucred);
6134 r = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &u, &n);
6138 if (n != sizeof(struct ucred))
6141 /* Check if the data is actually useful and not suppressed due
6142 * to namespacing issues */
6150 int getpeersec(int fd, char **ret) {
6162 r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n);
6166 if (errno != ERANGE)
6173 r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n);
6189 /* This is much like like mkostemp() but is subject to umask(). */
6190 int mkostemp_safe(char *pattern, int flags) {
6191 _cleanup_umask_ mode_t u;
6198 fd = mkostemp(pattern, flags);
6205 int open_tmpfile(const char *path, int flags) {
6212 /* Try O_TMPFILE first, if it is supported */
6213 fd = open(path, flags|O_TMPFILE, S_IRUSR|S_IWUSR);
6218 /* Fall back to unguessable name + unlinking */
6219 p = strappenda(path, "/systemd-tmp-XXXXXX");
6221 fd = mkostemp_safe(p, flags);
6229 int fd_warn_permissions(const char *path, int fd) {
6232 if (fstat(fd, &st) < 0)
6235 if (st.st_mode & 0111)
6236 log_warning("Configuration file %s is marked executable. Please remove executable permission bits. Proceeding anyway.", path);
6238 if (st.st_mode & 0002)
6239 log_warning("Configuration file %s is marked world-writable. Please remove world writability permission bits. Proceeding anyway.", path);
6241 if (getpid() == 1 && (st.st_mode & 0044) != 0044)
6242 log_warning("Configuration file %s is marked world-inaccessible. This has no effect as configuration data is accessible via APIs without restrictions. Proceeding anyway.", path);
6247 unsigned long personality_from_string(const char *p) {
6249 /* Parse a personality specifier. We introduce our own
6250 * identifiers that indicate specific ABIs, rather than just
6251 * hints regarding the register size, since we want to keep
6252 * things open for multiple locally supported ABIs for the
6253 * same register size. We try to reuse the ABI identifiers
6254 * used by libseccomp. */
6256 #if defined(__x86_64__)
6258 if (streq(p, "x86"))
6261 if (streq(p, "x86-64"))
6264 #elif defined(__i386__)
6266 if (streq(p, "x86"))
6270 /* personality(7) documents that 0xffffffffUL is used for
6271 * querying the current personality, hence let's use that here
6272 * as error indicator. */
6273 return 0xffffffffUL;
6276 const char* personality_to_string(unsigned long p) {
6278 #if defined(__x86_64__)
6280 if (p == PER_LINUX32)
6286 #elif defined(__i386__)