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[] = {
2162 { "M", 1024ULL*1024ULL },
2163 { "G", 1024ULL*1024ULL*1024ULL },
2164 { "T", 1024ULL*1024ULL*1024ULL*1024ULL },
2165 { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL },
2166 { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL },
2170 static const struct table si[] = {
2173 { "M", 1000ULL*1000ULL },
2174 { "G", 1000ULL*1000ULL*1000ULL },
2175 { "T", 1000ULL*1000ULL*1000ULL*1000ULL },
2176 { "P", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL },
2177 { "E", 1000ULL*1000ULL*1000ULL*1000ULL*1000ULL*1000ULL },
2181 const struct table *table;
2183 unsigned long long r = 0;
2187 assert(base == 1000 || base == 1024);
2192 n_entries = ELEMENTSOF(si);
2195 n_entries = ELEMENTSOF(iec);
2205 l = strtoll(p, &e, 10);
2216 e += strspn(e, WHITESPACE);
2218 for (i = 0; i < n_entries; i++)
2219 if (startswith(e, table[i].suffix)) {
2220 unsigned long long tmp;
2221 if ((unsigned long long) l > ULLONG_MAX / table[i].factor)
2223 tmp = l * table[i].factor;
2224 if (tmp > ULLONG_MAX - r)
2228 if ((unsigned long long) (off_t) r != r)
2231 p = e + strlen(table[i].suffix);
2245 int make_stdio(int fd) {
2250 r = dup3(fd, STDIN_FILENO, 0);
2251 s = dup3(fd, STDOUT_FILENO, 0);
2252 t = dup3(fd, STDERR_FILENO, 0);
2255 close_nointr_nofail(fd);
2257 if (r < 0 || s < 0 || t < 0)
2260 /* We rely here that the new fd has O_CLOEXEC not set */
2265 int make_null_stdio(void) {
2268 null_fd = open("/dev/null", O_RDWR|O_NOCTTY);
2272 return make_stdio(null_fd);
2275 bool is_device_path(const char *path) {
2277 /* Returns true on paths that refer to a device, either in
2278 * sysfs or in /dev */
2281 path_startswith(path, "/dev/") ||
2282 path_startswith(path, "/sys/");
2285 int dir_is_empty(const char *path) {
2286 _cleanup_closedir_ DIR *d;
2297 if (!de && errno != 0)
2303 if (!ignore_file(de->d_name))
2308 char* dirname_malloc(const char *path) {
2309 char *d, *dir, *dir2;
2326 int dev_urandom(void *p, size_t n) {
2327 _cleanup_close_ int fd;
2330 fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY);
2332 return errno == ENOENT ? -ENOSYS : -errno;
2334 k = loop_read(fd, p, n, true);
2337 if ((size_t) k != n)
2343 void random_bytes(void *p, size_t n) {
2344 static bool srand_called = false;
2348 r = dev_urandom(p, n);
2352 /* If some idiot made /dev/urandom unavailable to us, he'll
2353 * get a PRNG instead. */
2355 if (!srand_called) {
2358 #ifdef HAVE_SYS_AUXV_H
2359 /* The kernel provides us with a bit of entropy in
2360 * auxv, so let's try to make use of that to seed the
2361 * pseudo-random generator. It's better than
2366 auxv = (void*) getauxval(AT_RANDOM);
2368 x ^= *(unsigned*) auxv;
2371 x ^= (unsigned) now(CLOCK_REALTIME);
2372 x ^= (unsigned) gettid();
2375 srand_called = true;
2378 for (q = p; q < (uint8_t*) p + n; q ++)
2382 void rename_process(const char name[8]) {
2385 /* This is a like a poor man's setproctitle(). It changes the
2386 * comm field, argv[0], and also the glibc's internally used
2387 * name of the process. For the first one a limit of 16 chars
2388 * applies, to the second one usually one of 10 (i.e. length
2389 * of "/sbin/init"), to the third one one of 7 (i.e. length of
2390 * "systemd"). If you pass a longer string it will be
2393 prctl(PR_SET_NAME, name);
2395 if (program_invocation_name)
2396 strncpy(program_invocation_name, name, strlen(program_invocation_name));
2398 if (saved_argc > 0) {
2402 strncpy(saved_argv[0], name, strlen(saved_argv[0]));
2404 for (i = 1; i < saved_argc; i++) {
2408 memzero(saved_argv[i], strlen(saved_argv[i]));
2413 void sigset_add_many(sigset_t *ss, ...) {
2420 while ((sig = va_arg(ap, int)) > 0)
2421 assert_se(sigaddset(ss, sig) == 0);
2425 char* gethostname_malloc(void) {
2428 assert_se(uname(&u) >= 0);
2430 if (!isempty(u.nodename) && !streq(u.nodename, "(none)"))
2431 return strdup(u.nodename);
2433 return strdup(u.sysname);
2436 bool hostname_is_set(void) {
2439 assert_se(uname(&u) >= 0);
2441 return !isempty(u.nodename) && !streq(u.nodename, "(none)");
2444 static char *lookup_uid(uid_t uid) {
2447 _cleanup_free_ char *buf = NULL;
2448 struct passwd pwbuf, *pw = NULL;
2450 /* Shortcut things to avoid NSS lookups */
2452 return strdup("root");
2454 bufsize = sysconf(_SC_GETPW_R_SIZE_MAX);
2458 buf = malloc(bufsize);
2462 if (getpwuid_r(uid, &pwbuf, buf, bufsize, &pw) == 0 && pw)
2463 return strdup(pw->pw_name);
2465 if (asprintf(&name, "%lu", (unsigned long) uid) < 0)
2471 char* getlogname_malloc(void) {
2475 if (isatty(STDIN_FILENO) && fstat(STDIN_FILENO, &st) >= 0)
2480 return lookup_uid(uid);
2483 char *getusername_malloc(void) {
2490 return lookup_uid(getuid());
2493 int getttyname_malloc(int fd, char **r) {
2494 char path[PATH_MAX], *c;
2499 k = ttyname_r(fd, path, sizeof(path));
2505 c = strdup(startswith(path, "/dev/") ? path + 5 : path);
2513 int getttyname_harder(int fd, char **r) {
2517 k = getttyname_malloc(fd, &s);
2521 if (streq(s, "tty")) {
2523 return get_ctty(0, NULL, r);
2530 int get_ctty_devnr(pid_t pid, dev_t *d) {
2532 _cleanup_free_ char *line = NULL;
2534 unsigned long ttynr;
2538 p = procfs_file_alloca(pid, "stat");
2539 r = read_one_line_file(p, &line);
2543 p = strrchr(line, ')');
2553 "%*d " /* session */
2558 if (major(ttynr) == 0 && minor(ttynr) == 0)
2567 int get_ctty(pid_t pid, dev_t *_devnr, char **r) {
2568 char fn[sizeof("/dev/char/")-1 + 2*DECIMAL_STR_MAX(unsigned) + 1 + 1], *b = NULL;
2569 _cleanup_free_ char *s = NULL;
2576 k = get_ctty_devnr(pid, &devnr);
2580 snprintf(fn, sizeof(fn), "/dev/char/%u:%u", major(devnr), minor(devnr));
2582 k = readlink_malloc(fn, &s);
2588 /* This is an ugly hack */
2589 if (major(devnr) == 136) {
2590 asprintf(&b, "pts/%lu", (unsigned long) minor(devnr));
2594 /* Probably something like the ptys which have no
2595 * symlink in /dev/char. Let's return something
2596 * vaguely useful. */
2602 if (startswith(s, "/dev/"))
2604 else if (startswith(s, "../"))
2622 int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) {
2628 /* This returns the first error we run into, but nevertheless
2629 * tries to go on. This closes the passed fd. */
2633 close_nointr_nofail(fd);
2635 return errno == ENOENT ? 0 : -errno;
2640 bool is_dir, keep_around;
2646 if (!de && errno != 0) {
2655 if (streq(de->d_name, ".") || streq(de->d_name, ".."))
2658 if (de->d_type == DT_UNKNOWN ||
2660 (de->d_type == DT_DIR && root_dev)) {
2661 if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
2662 if (ret == 0 && errno != ENOENT)
2667 is_dir = S_ISDIR(st.st_mode);
2670 (st.st_uid == 0 || st.st_uid == getuid()) &&
2671 (st.st_mode & S_ISVTX);
2673 is_dir = de->d_type == DT_DIR;
2674 keep_around = false;
2680 /* if root_dev is set, remove subdirectories only, if device is same as dir */
2681 if (root_dev && st.st_dev != root_dev->st_dev)
2684 subdir_fd = openat(fd, de->d_name,
2685 O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME);
2686 if (subdir_fd < 0) {
2687 if (ret == 0 && errno != ENOENT)
2692 r = rm_rf_children_dangerous(subdir_fd, only_dirs, honour_sticky, root_dev);
2693 if (r < 0 && ret == 0)
2697 if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) {
2698 if (ret == 0 && errno != ENOENT)
2702 } else if (!only_dirs && !keep_around) {
2704 if (unlinkat(fd, de->d_name, 0) < 0) {
2705 if (ret == 0 && errno != ENOENT)
2716 _pure_ static int is_temporary_fs(struct statfs *s) {
2719 return F_TYPE_EQUAL(s->f_type, TMPFS_MAGIC) ||
2720 F_TYPE_EQUAL(s->f_type, RAMFS_MAGIC);
2723 int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) {
2728 if (fstatfs(fd, &s) < 0) {
2729 close_nointr_nofail(fd);
2733 /* We refuse to clean disk file systems with this call. This
2734 * is extra paranoia just to be sure we never ever remove
2736 if (!is_temporary_fs(&s)) {
2737 log_error("Attempted to remove disk file system, and we can't allow that.");
2738 close_nointr_nofail(fd);
2742 return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev);
2745 static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) {
2751 /* We refuse to clean the root file system with this
2752 * call. This is extra paranoia to never cause a really
2753 * seriously broken system. */
2754 if (path_equal(path, "/")) {
2755 log_error("Attempted to remove entire root file system, and we can't allow that.");
2759 fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME);
2762 if (errno != ENOTDIR)
2766 if (statfs(path, &s) < 0)
2769 if (!is_temporary_fs(&s)) {
2770 log_error("Attempted to remove disk file system, and we can't allow that.");
2775 if (delete_root && !only_dirs)
2776 if (unlink(path) < 0 && errno != ENOENT)
2783 if (fstatfs(fd, &s) < 0) {
2784 close_nointr_nofail(fd);
2788 if (!is_temporary_fs(&s)) {
2789 log_error("Attempted to remove disk file system, and we can't allow that.");
2790 close_nointr_nofail(fd);
2795 r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL);
2798 if (honour_sticky && file_is_priv_sticky(path) > 0)
2801 if (rmdir(path) < 0 && errno != ENOENT) {
2810 int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) {
2811 return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false);
2814 int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) {
2815 return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true);
2818 int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) {
2821 /* Under the assumption that we are running privileged we
2822 * first change the access mode and only then hand out
2823 * ownership to avoid a window where access is too open. */
2825 if (mode != (mode_t) -1)
2826 if (chmod(path, mode) < 0)
2829 if (uid != (uid_t) -1 || gid != (gid_t) -1)
2830 if (chown(path, uid, gid) < 0)
2836 int fchmod_and_fchown(int fd, mode_t mode, uid_t uid, gid_t gid) {
2839 /* Under the assumption that we are running privileged we
2840 * first change the access mode and only then hand out
2841 * ownership to avoid a window where access is too open. */
2843 if (mode != (mode_t) -1)
2844 if (fchmod(fd, mode) < 0)
2847 if (uid != (uid_t) -1 || gid != (gid_t) -1)
2848 if (fchown(fd, uid, gid) < 0)
2854 cpu_set_t* cpu_set_malloc(unsigned *ncpus) {
2858 /* Allocates the cpuset in the right size */
2861 if (!(r = CPU_ALLOC(n)))
2864 if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), r) >= 0) {
2865 CPU_ZERO_S(CPU_ALLOC_SIZE(n), r);
2875 if (errno != EINVAL)
2882 int status_vprintf(const char *status, bool ellipse, bool ephemeral, const char *format, va_list ap) {
2883 static const char status_indent[] = " "; /* "[" STATUS "] " */
2884 _cleanup_free_ char *s = NULL;
2885 _cleanup_close_ int fd = -1;
2886 struct iovec iovec[6] = {};
2888 static bool prev_ephemeral;
2892 /* This is independent of logging, as status messages are
2893 * optional and go exclusively to the console. */
2895 if (vasprintf(&s, format, ap) < 0)
2898 fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
2911 sl = status ? sizeof(status_indent)-1 : 0;
2917 e = ellipsize(s, emax, 75);
2925 IOVEC_SET_STRING(iovec[n++], "\r" ANSI_ERASE_TO_END_OF_LINE);
2926 prev_ephemeral = ephemeral;
2929 if (!isempty(status)) {
2930 IOVEC_SET_STRING(iovec[n++], "[");
2931 IOVEC_SET_STRING(iovec[n++], status);
2932 IOVEC_SET_STRING(iovec[n++], "] ");
2934 IOVEC_SET_STRING(iovec[n++], status_indent);
2937 IOVEC_SET_STRING(iovec[n++], s);
2939 IOVEC_SET_STRING(iovec[n++], "\n");
2941 if (writev(fd, iovec, n) < 0)
2947 int status_printf(const char *status, bool ellipse, bool ephemeral, const char *format, ...) {
2953 va_start(ap, format);
2954 r = status_vprintf(status, ellipse, ephemeral, format, ap);
2960 char *replace_env(const char *format, char **env) {
2967 const char *e, *word = format;
2972 for (e = format; *e; e ++) {
2983 if (!(k = strnappend(r, word, e-word-1)))
2992 } else if (*e == '$') {
2993 if (!(k = strnappend(r, word, e-word)))
3009 t = strempty(strv_env_get_n(env, word+2, e-word-2));
3011 k = strappend(r, t);
3025 if (!(k = strnappend(r, word, e-word)))
3036 char **replace_env_argv(char **argv, char **env) {
3038 unsigned k = 0, l = 0;
3040 l = strv_length(argv);
3042 if (!(r = new(char*, l+1)))
3045 STRV_FOREACH(i, argv) {
3047 /* If $FOO appears as single word, replace it by the split up variable */
3048 if ((*i)[0] == '$' && (*i)[1] != '{') {
3053 e = strv_env_get(env, *i+1);
3056 if (!(m = strv_split_quoted(e))) {
3067 if (!(w = realloc(r, sizeof(char*) * (l+1)))) {
3076 memcpy(r + k, m, q * sizeof(char*));
3084 /* If ${FOO} appears as part of a word, replace it by the variable as-is */
3085 if (!(r[k++] = replace_env(*i, env))) {
3095 int fd_columns(int fd) {
3096 struct winsize ws = {};
3098 if (ioctl(fd, TIOCGWINSZ, &ws) < 0)
3107 unsigned columns(void) {
3111 if (_likely_(cached_columns > 0))
3112 return cached_columns;
3115 e = getenv("COLUMNS");
3120 c = fd_columns(STDOUT_FILENO);
3129 int fd_lines(int fd) {
3130 struct winsize ws = {};
3132 if (ioctl(fd, TIOCGWINSZ, &ws) < 0)
3141 unsigned lines(void) {
3145 if (_likely_(cached_lines > 0))
3146 return cached_lines;
3149 e = getenv("LINES");
3154 l = fd_lines(STDOUT_FILENO);
3160 return cached_lines;
3163 /* intended to be used as a SIGWINCH sighandler */
3164 void columns_lines_cache_reset(int signum) {
3170 static int cached_on_tty = -1;
3172 if (_unlikely_(cached_on_tty < 0))
3173 cached_on_tty = isatty(STDOUT_FILENO) > 0;
3175 return cached_on_tty;
3178 int running_in_chroot(void) {
3179 struct stat a = {}, b = {};
3181 /* Only works as root */
3182 if (stat("/proc/1/root", &a) < 0)
3185 if (stat("/", &b) < 0)
3189 a.st_dev != b.st_dev ||
3190 a.st_ino != b.st_ino;
3193 static char *ascii_ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) {
3198 assert(percent <= 100);
3199 assert(new_length >= 3);
3201 if (old_length <= 3 || old_length <= new_length)
3202 return strndup(s, old_length);
3204 r = new0(char, new_length+1);
3208 x = (new_length * percent) / 100;
3210 if (x > new_length - 3)
3218 s + old_length - (new_length - x - 3),
3219 new_length - x - 3);
3224 char *ellipsize_mem(const char *s, size_t old_length, size_t new_length, unsigned percent) {
3228 unsigned k, len, len2;
3231 assert(percent <= 100);
3232 assert(new_length >= 3);
3234 /* if no multibyte characters use ascii_ellipsize_mem for speed */
3235 if (ascii_is_valid(s))
3236 return ascii_ellipsize_mem(s, old_length, new_length, percent);
3238 if (old_length <= 3 || old_length <= new_length)
3239 return strndup(s, old_length);
3241 x = (new_length * percent) / 100;
3243 if (x > new_length - 3)
3247 for (i = s; k < x && i < s + old_length; i = utf8_next_char(i)) {
3250 c = utf8_encoded_to_unichar(i);
3253 k += unichar_iswide(c) ? 2 : 1;
3256 if (k > x) /* last character was wide and went over quota */
3259 for (j = s + old_length; k < new_length && j > i; ) {
3262 j = utf8_prev_char(j);
3263 c = utf8_encoded_to_unichar(j);
3266 k += unichar_iswide(c) ? 2 : 1;
3270 /* we don't actually need to ellipsize */
3272 return memdup(s, old_length + 1);
3274 /* make space for ellipsis */
3275 j = utf8_next_char(j);
3278 len2 = s + old_length - j;
3279 e = new(char, len + 3 + len2 + 1);
3284 printf("old_length=%zu new_length=%zu x=%zu len=%u len2=%u k=%u\n",
3285 old_length, new_length, x, len, len2, k);
3289 e[len] = 0xe2; /* tri-dot ellipsis: … */
3293 memcpy(e + len + 3, j, len2 + 1);
3298 char *ellipsize(const char *s, size_t length, unsigned percent) {
3299 return ellipsize_mem(s, strlen(s), length, percent);
3302 int touch(const char *path) {
3307 /* This just opens the file for writing, ensuring it
3308 * exists. It doesn't call utimensat() the way /usr/bin/touch
3311 fd = open(path, O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644);
3315 close_nointr_nofail(fd);
3319 char *unquote(const char *s, const char* quotes) {
3323 /* This is rather stupid, simply removes the heading and
3324 * trailing quotes if there is one. Doesn't care about
3325 * escaping or anything. We should make this smarter one
3332 if (strchr(quotes, s[0]) && s[l-1] == s[0])
3333 return strndup(s+1, l-2);
3338 char *normalize_env_assignment(const char *s) {
3339 _cleanup_free_ char *name = NULL, *value = NULL, *p = NULL;
3342 eq = strchr(s, '=');
3354 memmove(r, t, strlen(t) + 1);
3358 name = strndup(s, eq - s);
3366 value = unquote(strstrip(p), QUOTES);
3370 if (asprintf(&r, "%s=%s", strstrip(name), value) < 0)
3376 int wait_for_terminate(pid_t pid, siginfo_t *status) {
3387 if (waitid(P_PID, pid, status, WEXITED) < 0) {
3399 int wait_for_terminate_and_warn(const char *name, pid_t pid) {
3406 r = wait_for_terminate(pid, &status);
3408 log_warning("Failed to wait for %s: %s", name, strerror(-r));
3412 if (status.si_code == CLD_EXITED) {
3413 if (status.si_status != 0) {
3414 log_warning("%s failed with error code %i.", name, status.si_status);
3415 return status.si_status;
3418 log_debug("%s succeeded.", name);
3421 } else if (status.si_code == CLD_KILLED ||
3422 status.si_code == CLD_DUMPED) {
3424 log_warning("%s terminated by signal %s.", name, signal_to_string(status.si_status));
3428 log_warning("%s failed due to unknown reason.", name);
3432 noreturn void freeze(void) {
3434 /* Make sure nobody waits for us on a socket anymore */
3435 close_all_fds(NULL, 0);
3443 bool null_or_empty(struct stat *st) {
3446 if (S_ISREG(st->st_mode) && st->st_size <= 0)
3449 if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode))
3455 int null_or_empty_path(const char *fn) {
3460 if (stat(fn, &st) < 0)
3463 return null_or_empty(&st);
3466 DIR *xopendirat(int fd, const char *name, int flags) {
3470 assert(!(flags & O_CREAT));
3472 nfd = openat(fd, name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|flags, 0);
3478 close_nointr_nofail(nfd);
3485 int signal_from_string_try_harder(const char *s) {
3489 signo = signal_from_string(s);
3491 if (startswith(s, "SIG"))
3492 return signal_from_string(s+3);
3497 static char *tag_to_udev_node(const char *tagvalue, const char *by) {
3498 _cleanup_free_ char *t = NULL, *u = NULL;
3502 u = unquote(tagvalue, "\"\'");
3506 enc_len = strlen(u) * 4 + 1;
3507 t = new(char, enc_len);
3511 if (encode_devnode_name(u, t, enc_len) < 0)
3514 if (asprintf(&dn, "/dev/disk/by-%s/%s", by, t) < 0)
3520 char *fstab_node_to_udev_node(const char *p) {
3523 if (startswith(p, "LABEL="))
3524 return tag_to_udev_node(p+6, "label");
3526 if (startswith(p, "UUID="))
3527 return tag_to_udev_node(p+5, "uuid");
3529 if (startswith(p, "PARTUUID="))
3530 return tag_to_udev_node(p+9, "partuuid");
3532 if (startswith(p, "PARTLABEL="))
3533 return tag_to_udev_node(p+10, "partlabel");
3538 bool tty_is_vc(const char *tty) {
3541 if (startswith(tty, "/dev/"))
3544 return vtnr_from_tty(tty) >= 0;
3547 bool tty_is_console(const char *tty) {
3550 if (startswith(tty, "/dev/"))
3553 return streq(tty, "console");
3556 int vtnr_from_tty(const char *tty) {
3561 if (startswith(tty, "/dev/"))
3564 if (!startswith(tty, "tty") )
3567 if (tty[3] < '0' || tty[3] > '9')
3570 r = safe_atoi(tty+3, &i);
3574 if (i < 0 || i > 63)
3580 char *resolve_dev_console(char **active) {
3583 /* Resolve where /dev/console is pointing to, if /sys is actually ours
3584 * (i.e. not read-only-mounted which is a sign for container setups) */
3586 if (path_is_read_only_fs("/sys") > 0)
3589 if (read_one_line_file("/sys/class/tty/console/active", active) < 0)
3592 /* If multiple log outputs are configured the last one is what
3593 * /dev/console points to */
3594 tty = strrchr(*active, ' ');
3600 if (streq(tty, "tty0")) {
3603 /* Get the active VC (e.g. tty1) */
3604 if (read_one_line_file("/sys/class/tty/tty0/active", &tmp) >= 0) {
3606 tty = *active = tmp;
3613 bool tty_is_vc_resolve(const char *tty) {
3614 _cleanup_free_ char *active = NULL;
3618 if (startswith(tty, "/dev/"))
3621 if (streq(tty, "console")) {
3622 tty = resolve_dev_console(&active);
3627 return tty_is_vc(tty);
3630 const char *default_term_for_tty(const char *tty) {
3633 return tty_is_vc_resolve(tty) ? "TERM=linux" : "TERM=vt102";
3636 bool dirent_is_file(const struct dirent *de) {
3639 if (ignore_file(de->d_name))
3642 if (de->d_type != DT_REG &&
3643 de->d_type != DT_LNK &&
3644 de->d_type != DT_UNKNOWN)
3650 bool dirent_is_file_with_suffix(const struct dirent *de, const char *suffix) {
3653 if (de->d_type != DT_REG &&
3654 de->d_type != DT_LNK &&
3655 de->d_type != DT_UNKNOWN)
3658 if (ignore_file_allow_backup(de->d_name))
3661 return endswith(de->d_name, suffix);
3664 void execute_directory(const char *directory, DIR *d, char *argv[]) {
3667 Hashmap *pids = NULL;
3671 /* Executes all binaries in a directory in parallel and
3672 * waits for them to finish. */
3675 if (!(_d = opendir(directory))) {
3677 if (errno == ENOENT)
3680 log_error("Failed to enumerate directory %s: %m", directory);
3687 if (!(pids = hashmap_new(trivial_hash_func, trivial_compare_func))) {
3688 log_error("Failed to allocate set.");
3692 while ((de = readdir(d))) {
3697 if (!dirent_is_file(de))
3700 if (asprintf(&path, "%s/%s", directory, de->d_name) < 0) {
3705 if ((pid = fork()) < 0) {
3706 log_error("Failed to fork: %m");
3724 log_error("Failed to execute %s: %m", path);
3725 _exit(EXIT_FAILURE);
3728 log_debug("Spawned %s as %lu", path, (unsigned long) pid);
3730 if ((k = hashmap_put(pids, UINT_TO_PTR(pid), path)) < 0) {
3731 log_error("Failed to add PID to set: %s", strerror(-k));
3736 while (!hashmap_isempty(pids)) {
3737 pid_t pid = PTR_TO_UINT(hashmap_first_key(pids));
3741 if (waitid(P_PID, pid, &si, WEXITED) < 0) {
3746 log_error("waitid() failed: %m");
3750 if ((path = hashmap_remove(pids, UINT_TO_PTR(si.si_pid)))) {
3751 if (!is_clean_exit(si.si_code, si.si_status, NULL)) {
3752 if (si.si_code == CLD_EXITED)
3753 log_error("%s exited with exit status %i.", path, si.si_status);
3755 log_error("%s terminated by signal %s.", path, signal_to_string(si.si_status));
3757 log_debug("%s exited successfully.", path);
3768 hashmap_free_free(pids);
3771 int kill_and_sigcont(pid_t pid, int sig) {
3774 r = kill(pid, sig) < 0 ? -errno : 0;
3782 bool nulstr_contains(const char*nulstr, const char *needle) {
3788 NULSTR_FOREACH(i, nulstr)
3789 if (streq(i, needle))
3795 bool plymouth_running(void) {
3796 return access("/run/plymouth/pid", F_OK) >= 0;
3799 char* strshorten(char *s, size_t l) {
3808 static bool hostname_valid_char(char c) {
3810 (c >= 'a' && c <= 'z') ||
3811 (c >= 'A' && c <= 'Z') ||
3812 (c >= '0' && c <= '9') ||
3818 bool hostname_is_valid(const char *s) {
3825 for (p = s, dot = true; *p; p++) {
3832 if (!hostname_valid_char(*p))
3842 if (p-s > HOST_NAME_MAX)
3848 char* hostname_cleanup(char *s, bool lowercase) {
3852 for (p = s, d = s, dot = true; *p; p++) {
3859 } else if (hostname_valid_char(*p)) {
3860 *(d++) = lowercase ? tolower(*p) : *p;
3871 strshorten(s, HOST_NAME_MAX);
3876 int pipe_eof(int fd) {
3877 struct pollfd pollfd = {
3879 .events = POLLIN|POLLHUP,
3884 r = poll(&pollfd, 1, 0);
3891 return pollfd.revents & POLLHUP;
3894 int fd_wait_for_event(int fd, int event, usec_t t) {
3896 struct pollfd pollfd = {
3904 r = ppoll(&pollfd, 1, t == (usec_t) -1 ? NULL : timespec_store(&ts, t), NULL);
3911 return pollfd.revents;
3914 int fopen_temporary(const char *path, FILE **_f, char **_temp_path) {
3925 t = new(char, strlen(path) + 1 + 6 + 1);
3929 fn = basename(path);
3933 stpcpy(stpcpy(t+k+1, fn), "XXXXXX");
3935 fd = mkostemp_safe(t, O_WRONLY|O_CLOEXEC);
3941 f = fdopen(fd, "we");
3954 int terminal_vhangup_fd(int fd) {
3957 if (ioctl(fd, TIOCVHANGUP) < 0)
3963 int terminal_vhangup(const char *name) {
3966 fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
3970 r = terminal_vhangup_fd(fd);
3971 close_nointr_nofail(fd);
3976 int vt_disallocate(const char *name) {
3980 /* Deallocate the VT if possible. If not possible
3981 * (i.e. because it is the active one), at least clear it
3982 * entirely (including the scrollback buffer) */
3984 if (!startswith(name, "/dev/"))
3987 if (!tty_is_vc(name)) {
3988 /* So this is not a VT. I guess we cannot deallocate
3989 * it then. But let's at least clear the screen */
3991 fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
3996 "\033[r" /* clear scrolling region */
3997 "\033[H" /* move home */
3998 "\033[2J", /* clear screen */
4000 close_nointr_nofail(fd);
4005 if (!startswith(name, "/dev/tty"))
4008 r = safe_atou(name+8, &u);
4015 /* Try to deallocate */
4016 fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC);
4020 r = ioctl(fd, VT_DISALLOCATE, u);
4021 close_nointr_nofail(fd);
4029 /* Couldn't deallocate, so let's clear it fully with
4031 fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC);
4036 "\033[r" /* clear scrolling region */
4037 "\033[H" /* move home */
4038 "\033[3J", /* clear screen including scrollback, requires Linux 2.6.40 */
4040 close_nointr_nofail(fd);
4045 int copy_file(const char *from, const char *to, int flags) {
4046 _cleanup_close_ int fdf = -1;
4052 fdf = open(from, O_RDONLY|O_CLOEXEC|O_NOCTTY);
4056 fdt = open(to, flags|O_WRONLY|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644);
4064 n = read(fdf, buf, sizeof(buf));
4078 k = loop_write(fdt, buf, n, false);
4080 r = k < 0 ? k : (errno ? -errno : -EIO);
4089 r = close_nointr(fdt);
4099 int symlink_atomic(const char *from, const char *to) {
4101 _cleanup_free_ char *t;
4111 t = new(char, strlen(to) + 1 + 16 + 1);
4119 x = stpcpy(t+k+1, fn);
4122 for (i = 0; i < 16; i++) {
4123 *(x++) = hexchar(u & 0xF);
4129 if (symlink(from, t) < 0)
4132 if (rename(t, to) < 0) {
4141 bool display_is_local(const char *display) {
4145 display[0] == ':' &&
4146 display[1] >= '0' &&
4150 int socket_from_display(const char *display, char **path) {
4157 if (!display_is_local(display))
4160 k = strspn(display+1, "0123456789");
4162 f = new(char, sizeof("/tmp/.X11-unix/X") + k);
4166 c = stpcpy(f, "/tmp/.X11-unix/X");
4167 memcpy(c, display+1, k);
4176 const char **username,
4177 uid_t *uid, gid_t *gid,
4179 const char **shell) {
4187 /* We enforce some special rules for uid=0: in order to avoid
4188 * NSS lookups for root we hardcode its data. */
4190 if (streq(*username, "root") || streq(*username, "0")) {
4208 if (parse_uid(*username, &u) >= 0) {
4212 /* If there are multiple users with the same id, make
4213 * sure to leave $USER to the configured value instead
4214 * of the first occurrence in the database. However if
4215 * the uid was configured by a numeric uid, then let's
4216 * pick the real username from /etc/passwd. */
4218 *username = p->pw_name;
4221 p = getpwnam(*username);
4225 return errno > 0 ? -errno : -ESRCH;
4237 *shell = p->pw_shell;
4242 char* uid_to_name(uid_t uid) {
4247 return strdup("root");
4251 return strdup(p->pw_name);
4253 if (asprintf(&r, "%lu", (unsigned long) uid) < 0)
4259 char* gid_to_name(gid_t gid) {
4264 return strdup("root");
4268 return strdup(p->gr_name);
4270 if (asprintf(&r, "%lu", (unsigned long) gid) < 0)
4276 int get_group_creds(const char **groupname, gid_t *gid) {
4282 /* We enforce some special rules for gid=0: in order to avoid
4283 * NSS lookups for root we hardcode its data. */
4285 if (streq(*groupname, "root") || streq(*groupname, "0")) {
4286 *groupname = "root";
4294 if (parse_gid(*groupname, &id) >= 0) {
4299 *groupname = g->gr_name;
4302 g = getgrnam(*groupname);
4306 return errno > 0 ? -errno : -ESRCH;
4314 int in_gid(gid_t gid) {
4316 int ngroups_max, r, i;
4318 if (getgid() == gid)
4321 if (getegid() == gid)
4324 ngroups_max = sysconf(_SC_NGROUPS_MAX);
4325 assert(ngroups_max > 0);
4327 gids = alloca(sizeof(gid_t) * ngroups_max);
4329 r = getgroups(ngroups_max, gids);
4333 for (i = 0; i < r; i++)
4340 int in_group(const char *name) {
4344 r = get_group_creds(&name, &gid);
4351 int glob_exists(const char *path) {
4352 _cleanup_globfree_ glob_t g = {};
4358 k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g);
4360 if (k == GLOB_NOMATCH)
4362 else if (k == GLOB_NOSPACE)
4365 return !strv_isempty(g.gl_pathv);
4367 return errno ? -errno : -EIO;
4370 int glob_extend(char ***strv, const char *path) {
4371 _cleanup_globfree_ glob_t g = {};
4376 k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g);
4378 if (k == GLOB_NOMATCH)
4380 else if (k == GLOB_NOSPACE)
4382 else if (k != 0 || strv_isempty(g.gl_pathv))
4383 return errno ? -errno : -EIO;
4385 STRV_FOREACH(p, g.gl_pathv) {
4386 k = strv_extend(strv, *p);
4394 int dirent_ensure_type(DIR *d, struct dirent *de) {
4400 if (de->d_type != DT_UNKNOWN)
4403 if (fstatat(dirfd(d), de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0)
4407 S_ISREG(st.st_mode) ? DT_REG :
4408 S_ISDIR(st.st_mode) ? DT_DIR :
4409 S_ISLNK(st.st_mode) ? DT_LNK :
4410 S_ISFIFO(st.st_mode) ? DT_FIFO :
4411 S_ISSOCK(st.st_mode) ? DT_SOCK :
4412 S_ISCHR(st.st_mode) ? DT_CHR :
4413 S_ISBLK(st.st_mode) ? DT_BLK :
4419 int in_search_path(const char *path, char **search) {
4421 _cleanup_free_ char *parent = NULL;
4424 r = path_get_parent(path, &parent);
4428 STRV_FOREACH(i, search)
4429 if (path_equal(parent, *i))
4435 int get_files_in_directory(const char *path, char ***list) {
4436 _cleanup_closedir_ DIR *d = NULL;
4437 size_t bufsize = 0, n = 0;
4438 _cleanup_strv_free_ char **l = NULL;
4442 /* Returns all files in a directory in *list, and the number
4443 * of files as return value. If list is NULL returns only the
4455 if (!de && errno != 0)
4460 dirent_ensure_type(d, de);
4462 if (!dirent_is_file(de))
4466 /* one extra slot is needed for the terminating NULL */
4467 if (!GREEDY_REALLOC(l, bufsize, n + 2))
4470 l[n] = strdup(de->d_name);
4481 l = NULL; /* avoid freeing */
4487 char *strjoin(const char *x, ...) {
4501 t = va_arg(ap, const char *);
4506 if (n > ((size_t) -1) - l) {
4530 t = va_arg(ap, const char *);
4544 bool is_main_thread(void) {
4545 static thread_local int cached = 0;
4547 if (_unlikely_(cached == 0))
4548 cached = getpid() == gettid() ? 1 : -1;
4553 int block_get_whole_disk(dev_t d, dev_t *ret) {
4560 /* If it has a queue this is good enough for us */
4561 if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0)
4564 r = access(p, F_OK);
4572 /* If it is a partition find the originating device */
4573 if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0)
4576 r = access(p, F_OK);
4582 /* Get parent dev_t */
4583 if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0)
4586 r = read_one_line_file(p, &s);
4592 r = sscanf(s, "%u:%u", &m, &n);
4598 /* Only return this if it is really good enough for us. */
4599 if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0)
4602 r = access(p, F_OK);
4606 *ret = makedev(m, n);
4613 int file_is_priv_sticky(const char *p) {
4618 if (lstat(p, &st) < 0)
4622 (st.st_uid == 0 || st.st_uid == getuid()) &&
4623 (st.st_mode & S_ISVTX);
4626 static const char *const ioprio_class_table[] = {
4627 [IOPRIO_CLASS_NONE] = "none",
4628 [IOPRIO_CLASS_RT] = "realtime",
4629 [IOPRIO_CLASS_BE] = "best-effort",
4630 [IOPRIO_CLASS_IDLE] = "idle"
4633 DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, INT_MAX);
4635 static const char *const sigchld_code_table[] = {
4636 [CLD_EXITED] = "exited",
4637 [CLD_KILLED] = "killed",
4638 [CLD_DUMPED] = "dumped",
4639 [CLD_TRAPPED] = "trapped",
4640 [CLD_STOPPED] = "stopped",
4641 [CLD_CONTINUED] = "continued",
4644 DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int);
4646 static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = {
4647 [LOG_FAC(LOG_KERN)] = "kern",
4648 [LOG_FAC(LOG_USER)] = "user",
4649 [LOG_FAC(LOG_MAIL)] = "mail",
4650 [LOG_FAC(LOG_DAEMON)] = "daemon",
4651 [LOG_FAC(LOG_AUTH)] = "auth",
4652 [LOG_FAC(LOG_SYSLOG)] = "syslog",
4653 [LOG_FAC(LOG_LPR)] = "lpr",
4654 [LOG_FAC(LOG_NEWS)] = "news",
4655 [LOG_FAC(LOG_UUCP)] = "uucp",
4656 [LOG_FAC(LOG_CRON)] = "cron",
4657 [LOG_FAC(LOG_AUTHPRIV)] = "authpriv",
4658 [LOG_FAC(LOG_FTP)] = "ftp",
4659 [LOG_FAC(LOG_LOCAL0)] = "local0",
4660 [LOG_FAC(LOG_LOCAL1)] = "local1",
4661 [LOG_FAC(LOG_LOCAL2)] = "local2",
4662 [LOG_FAC(LOG_LOCAL3)] = "local3",
4663 [LOG_FAC(LOG_LOCAL4)] = "local4",
4664 [LOG_FAC(LOG_LOCAL5)] = "local5",
4665 [LOG_FAC(LOG_LOCAL6)] = "local6",
4666 [LOG_FAC(LOG_LOCAL7)] = "local7"
4669 DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0));
4671 static const char *const log_level_table[] = {
4672 [LOG_EMERG] = "emerg",
4673 [LOG_ALERT] = "alert",
4674 [LOG_CRIT] = "crit",
4676 [LOG_WARNING] = "warning",
4677 [LOG_NOTICE] = "notice",
4678 [LOG_INFO] = "info",
4679 [LOG_DEBUG] = "debug"
4682 DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG);
4684 static const char* const sched_policy_table[] = {
4685 [SCHED_OTHER] = "other",
4686 [SCHED_BATCH] = "batch",
4687 [SCHED_IDLE] = "idle",
4688 [SCHED_FIFO] = "fifo",
4692 DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX);
4694 static const char* const rlimit_table[] = {
4695 [RLIMIT_CPU] = "LimitCPU",
4696 [RLIMIT_FSIZE] = "LimitFSIZE",
4697 [RLIMIT_DATA] = "LimitDATA",
4698 [RLIMIT_STACK] = "LimitSTACK",
4699 [RLIMIT_CORE] = "LimitCORE",
4700 [RLIMIT_RSS] = "LimitRSS",
4701 [RLIMIT_NOFILE] = "LimitNOFILE",
4702 [RLIMIT_AS] = "LimitAS",
4703 [RLIMIT_NPROC] = "LimitNPROC",
4704 [RLIMIT_MEMLOCK] = "LimitMEMLOCK",
4705 [RLIMIT_LOCKS] = "LimitLOCKS",
4706 [RLIMIT_SIGPENDING] = "LimitSIGPENDING",
4707 [RLIMIT_MSGQUEUE] = "LimitMSGQUEUE",
4708 [RLIMIT_NICE] = "LimitNICE",
4709 [RLIMIT_RTPRIO] = "LimitRTPRIO",
4710 [RLIMIT_RTTIME] = "LimitRTTIME"
4713 DEFINE_STRING_TABLE_LOOKUP(rlimit, int);
4715 static const char* const ip_tos_table[] = {
4716 [IPTOS_LOWDELAY] = "low-delay",
4717 [IPTOS_THROUGHPUT] = "throughput",
4718 [IPTOS_RELIABILITY] = "reliability",
4719 [IPTOS_LOWCOST] = "low-cost",
4722 DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ip_tos, int, 0xff);
4724 static const char *const __signal_table[] = {
4741 [SIGSTKFLT] = "STKFLT", /* Linux on SPARC doesn't know SIGSTKFLT */
4752 [SIGVTALRM] = "VTALRM",
4754 [SIGWINCH] = "WINCH",
4760 DEFINE_PRIVATE_STRING_TABLE_LOOKUP(__signal, int);
4762 const char *signal_to_string(int signo) {
4763 static thread_local char buf[sizeof("RTMIN+")-1 + DECIMAL_STR_MAX(int) + 1];
4766 name = __signal_to_string(signo);
4770 if (signo >= SIGRTMIN && signo <= SIGRTMAX)
4771 snprintf(buf, sizeof(buf), "RTMIN+%d", signo - SIGRTMIN);
4773 snprintf(buf, sizeof(buf), "%d", signo);
4778 int signal_from_string(const char *s) {
4783 signo = __signal_from_string(s);
4787 if (startswith(s, "RTMIN+")) {
4791 if (safe_atou(s, &u) >= 0) {
4792 signo = (int) u + offset;
4793 if (signo > 0 && signo < _NSIG)
4799 bool kexec_loaded(void) {
4800 bool loaded = false;
4803 if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) {
4811 int strdup_or_null(const char *a, char **b) {
4829 int prot_from_flags(int flags) {
4831 switch (flags & O_ACCMODE) {
4840 return PROT_READ|PROT_WRITE;
4847 char *format_bytes(char *buf, size_t l, off_t t) {
4850 static const struct {
4854 { "E", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL*1024ULL },
4855 { "P", 1024ULL*1024ULL*1024ULL*1024ULL*1024ULL },
4856 { "T", 1024ULL*1024ULL*1024ULL*1024ULL },
4857 { "G", 1024ULL*1024ULL*1024ULL },
4858 { "M", 1024ULL*1024ULL },
4862 for (i = 0; i < ELEMENTSOF(table); i++) {
4864 if (t >= table[i].factor) {
4867 (unsigned long long) (t / table[i].factor),
4868 (unsigned long long) (((t*10ULL) / table[i].factor) % 10ULL),
4875 snprintf(buf, l, "%lluB", (unsigned long long) t);
4883 void* memdup(const void *p, size_t l) {
4896 int fd_inc_sndbuf(int fd, size_t n) {
4898 socklen_t l = sizeof(value);
4900 r = getsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, &l);
4901 if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2)
4904 /* If we have the privileges we will ignore the kernel limit. */
4907 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUFFORCE, &value, sizeof(value)) < 0)
4908 if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &value, sizeof(value)) < 0)
4914 int fd_inc_rcvbuf(int fd, size_t n) {
4916 socklen_t l = sizeof(value);
4918 r = getsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, &l);
4919 if (r >= 0 && l == sizeof(value) && (size_t) value >= n*2)
4922 /* If we have the privileges we will ignore the kernel limit. */
4925 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUFFORCE, &value, sizeof(value)) < 0)
4926 if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &value, sizeof(value)) < 0)
4931 int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) {
4932 pid_t parent_pid, agent_pid;
4934 bool stdout_is_tty, stderr_is_tty;
4942 parent_pid = getpid();
4944 /* Spawns a temporary TTY agent, making sure it goes away when
4951 if (agent_pid != 0) {
4958 * Make sure the agent goes away when the parent dies */
4959 if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0)
4960 _exit(EXIT_FAILURE);
4962 /* Check whether our parent died before we were able
4963 * to set the death signal */
4964 if (getppid() != parent_pid)
4965 _exit(EXIT_SUCCESS);
4967 /* Don't leak fds to the agent */
4968 close_all_fds(except, n_except);
4970 stdout_is_tty = isatty(STDOUT_FILENO);
4971 stderr_is_tty = isatty(STDERR_FILENO);
4973 if (!stdout_is_tty || !stderr_is_tty) {
4974 /* Detach from stdout/stderr. and reopen
4975 * /dev/tty for them. This is important to
4976 * ensure that when systemctl is started via
4977 * popen() or a similar call that expects to
4978 * read EOF we actually do generate EOF and
4979 * not delay this indefinitely by because we
4980 * keep an unused copy of stdin around. */
4981 fd = open("/dev/tty", O_WRONLY);
4983 log_error("Failed to open /dev/tty: %m");
4984 _exit(EXIT_FAILURE);
4988 dup2(fd, STDOUT_FILENO);
4991 dup2(fd, STDERR_FILENO);
4997 /* Count arguments */
4999 for (n = 0; va_arg(ap, char*); n++)
5004 l = alloca(sizeof(char *) * (n + 1));
5006 /* Fill in arguments */
5008 for (i = 0; i <= n; i++)
5009 l[i] = va_arg(ap, char*);
5013 _exit(EXIT_FAILURE);
5016 int setrlimit_closest(int resource, const struct rlimit *rlim) {
5017 struct rlimit highest, fixed;
5021 if (setrlimit(resource, rlim) >= 0)
5027 /* So we failed to set the desired setrlimit, then let's try
5028 * to get as close as we can */
5029 assert_se(getrlimit(resource, &highest) == 0);
5031 fixed.rlim_cur = MIN(rlim->rlim_cur, highest.rlim_max);
5032 fixed.rlim_max = MIN(rlim->rlim_max, highest.rlim_max);
5034 if (setrlimit(resource, &fixed) < 0)
5040 int getenv_for_pid(pid_t pid, const char *field, char **_value) {
5041 _cleanup_fclose_ FILE *f = NULL;
5052 path = procfs_file_alloca(pid, "environ");
5054 f = fopen(path, "re");
5062 char line[LINE_MAX];
5065 for (i = 0; i < sizeof(line)-1; i++) {
5069 if (_unlikely_(c == EOF)) {
5079 if (memcmp(line, field, l) == 0 && line[l] == '=') {
5080 value = strdup(line + l + 1);
5094 bool is_valid_documentation_url(const char *url) {
5097 if (startswith(url, "http://") && url[7])
5100 if (startswith(url, "https://") && url[8])
5103 if (startswith(url, "file:") && url[5])
5106 if (startswith(url, "info:") && url[5])
5109 if (startswith(url, "man:") && url[4])
5115 bool in_initrd(void) {
5116 static int saved = -1;
5122 /* We make two checks here:
5124 * 1. the flag file /etc/initrd-release must exist
5125 * 2. the root file system must be a memory file system
5127 * The second check is extra paranoia, since misdetecting an
5128 * initrd can have bad bad consequences due the initrd
5129 * emptying when transititioning to the main systemd.
5132 saved = access("/etc/initrd-release", F_OK) >= 0 &&
5133 statfs("/", &s) >= 0 &&
5134 is_temporary_fs(&s);
5139 void warn_melody(void) {
5140 _cleanup_close_ int fd = -1;
5142 fd = open("/dev/console", O_WRONLY|O_CLOEXEC|O_NOCTTY);
5146 /* Yeah, this is synchronous. Kinda sucks. But well... */
5148 ioctl(fd, KIOCSOUND, (int)(1193180/440));
5149 usleep(125*USEC_PER_MSEC);
5151 ioctl(fd, KIOCSOUND, (int)(1193180/220));
5152 usleep(125*USEC_PER_MSEC);
5154 ioctl(fd, KIOCSOUND, (int)(1193180/220));
5155 usleep(125*USEC_PER_MSEC);
5157 ioctl(fd, KIOCSOUND, 0);
5160 int make_console_stdio(void) {
5163 /* Make /dev/console the controlling terminal and stdin/stdout/stderr */
5165 fd = acquire_terminal("/dev/console", false, true, true, (usec_t) -1);
5167 log_error("Failed to acquire terminal: %s", strerror(-fd));
5173 log_error("Failed to duplicate terminal fd: %s", strerror(-r));
5180 int get_home_dir(char **_h) {
5188 /* Take the user specified one */
5199 /* Hardcode home directory for root to avoid NSS */
5202 h = strdup("/root");
5210 /* Check the database... */
5214 return errno > 0 ? -errno : -ESRCH;
5216 if (!path_is_absolute(p->pw_dir))
5219 h = strdup(p->pw_dir);
5227 int get_shell(char **_s) {
5235 /* Take the user specified one */
5236 e = getenv("SHELL");
5246 /* Hardcode home directory for root to avoid NSS */
5249 s = strdup("/bin/sh");
5257 /* Check the database... */
5261 return errno > 0 ? -errno : -ESRCH;
5263 if (!path_is_absolute(p->pw_shell))
5266 s = strdup(p->pw_shell);
5274 bool filename_is_safe(const char *p) {
5288 if (strlen(p) > FILENAME_MAX)
5294 bool string_is_safe(const char *p) {
5299 for (t = p; *t; t++) {
5300 if (*t > 0 && *t < ' ')
5303 if (strchr("\\\"\'", *t))
5311 * Check if a string contains control characters.
5312 * Spaces and tabs are not considered control characters.
5314 bool string_has_cc(const char *p) {
5319 for (t = p; *t; t++)
5320 if (*t > 0 && *t < ' ' && *t != '\t')
5326 bool path_is_safe(const char *p) {
5331 if (streq(p, "..") || startswith(p, "../") || endswith(p, "/..") || strstr(p, "/../"))
5334 if (strlen(p) > PATH_MAX)
5337 /* The following two checks are not really dangerous, but hey, they still are confusing */
5338 if (streq(p, ".") || startswith(p, "./") || endswith(p, "/.") || strstr(p, "/./"))
5341 if (strstr(p, "//"))
5347 /* hey glibc, APIs with callbacks without a user pointer are so useless */
5348 void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
5349 int (*compar) (const void *, const void *, void *), void *arg) {
5358 p = (void *)(((const char *) base) + (idx * size));
5359 comparison = compar(key, p, arg);
5362 else if (comparison > 0)
5370 bool is_locale_utf8(void) {
5372 static int cached_answer = -1;
5374 if (cached_answer >= 0)
5377 if (!setlocale(LC_ALL, "")) {
5378 cached_answer = true;
5382 set = nl_langinfo(CODESET);
5384 cached_answer = true;
5388 if (streq(set, "UTF-8")) {
5389 cached_answer = true;
5393 /* For LC_CTYPE=="C" return true, because CTYPE is effectly
5394 * unset and everything can do to UTF-8 nowadays. */
5395 set = setlocale(LC_CTYPE, NULL);
5397 cached_answer = true;
5401 /* Check result, but ignore the result if C was set
5405 !getenv("LC_ALL") &&
5406 !getenv("LC_CTYPE") &&
5410 return (bool) cached_answer;
5413 const char *draw_special_char(DrawSpecialChar ch) {
5414 static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = {
5416 [DRAW_TREE_VERT] = "\342\224\202 ", /* │ */
5417 [DRAW_TREE_BRANCH] = "\342\224\234\342\224\200", /* ├─ */
5418 [DRAW_TREE_RIGHT] = "\342\224\224\342\224\200", /* └─ */
5419 [DRAW_TREE_SPACE] = " ", /* */
5420 [DRAW_TRIANGULAR_BULLET] = "\342\200\243 ", /* ‣ */
5421 [DRAW_BLACK_CIRCLE] = "\342\227\217 ", /* ● */
5423 /* ASCII fallback */ {
5424 [DRAW_TREE_VERT] = "| ",
5425 [DRAW_TREE_BRANCH] = "|-",
5426 [DRAW_TREE_RIGHT] = "`-",
5427 [DRAW_TREE_SPACE] = " ",
5428 [DRAW_TRIANGULAR_BULLET] = "> ",
5429 [DRAW_BLACK_CIRCLE] = "* ",
5433 return draw_table[!is_locale_utf8()][ch];
5436 char *strreplace(const char *text, const char *old_string, const char *new_string) {
5439 size_t l, old_len, new_len;
5445 old_len = strlen(old_string);
5446 new_len = strlen(new_string);
5459 if (!startswith(f, old_string)) {
5465 nl = l - old_len + new_len;
5466 a = realloc(r, nl + 1);
5474 t = stpcpy(t, new_string);
5486 char *strip_tab_ansi(char **ibuf, size_t *_isz) {
5487 const char *i, *begin = NULL;
5492 } state = STATE_OTHER;
5494 size_t osz = 0, isz;
5500 /* Strips ANSI color and replaces TABs by 8 spaces */
5502 isz = _isz ? *_isz : strlen(*ibuf);
5504 f = open_memstream(&obuf, &osz);
5508 for (i = *ibuf; i < *ibuf + isz + 1; i++) {
5513 if (i >= *ibuf + isz) /* EOT */
5515 else if (*i == '\x1B')
5516 state = STATE_ESCAPE;
5517 else if (*i == '\t')
5524 if (i >= *ibuf + isz) { /* EOT */
5527 } else if (*i == '[') {
5528 state = STATE_BRACKET;
5533 state = STATE_OTHER;
5540 if (i >= *ibuf + isz || /* EOT */
5541 (!(*i >= '0' && *i <= '9') && *i != ';' && *i != 'm')) {
5544 state = STATE_OTHER;
5546 } else if (*i == 'm')
5547 state = STATE_OTHER;
5569 int on_ac_power(void) {
5570 bool found_offline = false, found_online = false;
5571 _cleanup_closedir_ DIR *d = NULL;
5573 d = opendir("/sys/class/power_supply");
5579 _cleanup_close_ int fd = -1, device = -1;
5585 if (!de && errno != 0)
5591 if (ignore_file(de->d_name))
5594 device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY);
5596 if (errno == ENOENT || errno == ENOTDIR)
5602 fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY);
5604 if (errno == ENOENT)
5610 n = read(fd, contents, sizeof(contents));
5614 if (n != 6 || memcmp(contents, "Mains\n", 6))
5617 close_nointr_nofail(fd);
5618 fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY);
5620 if (errno == ENOENT)
5626 n = read(fd, contents, sizeof(contents));
5630 if (n != 2 || contents[1] != '\n')
5633 if (contents[0] == '1') {
5634 found_online = true;
5636 } else if (contents[0] == '0')
5637 found_offline = true;
5642 return found_online || !found_offline;
5645 static int search_and_fopen_internal(const char *path, const char *mode, char **search, FILE **_f) {
5652 if (!path_strv_canonicalize_absolute_uniq(search, NULL))
5655 STRV_FOREACH(i, search) {
5656 _cleanup_free_ char *p = NULL;
5659 p = strjoin(*i, "/", path, NULL);
5669 if (errno != ENOENT)
5676 int search_and_fopen(const char *path, const char *mode, const char **search, FILE **_f) {
5677 _cleanup_strv_free_ char **copy = NULL;
5683 if (path_is_absolute(path)) {
5686 f = fopen(path, mode);
5695 copy = strv_copy((char**) search);
5699 return search_and_fopen_internal(path, mode, copy, _f);
5702 int search_and_fopen_nulstr(const char *path, const char *mode, const char *search, FILE **_f) {
5703 _cleanup_strv_free_ char **s = NULL;
5705 if (path_is_absolute(path)) {
5708 f = fopen(path, mode);
5717 s = strv_split_nulstr(search);
5721 return search_and_fopen_internal(path, mode, s, _f);
5724 char *strextend(char **x, ...) {
5731 l = f = *x ? strlen(*x) : 0;
5738 t = va_arg(ap, const char *);
5743 if (n > ((size_t) -1) - l) {
5752 r = realloc(*x, l+1);
5762 t = va_arg(ap, const char *);
5776 char *strrep(const char *s, unsigned n) {
5784 p = r = malloc(l * n + 1);
5788 for (i = 0; i < n; i++)
5795 void* greedy_realloc(void **p, size_t *allocated, size_t need) {
5802 if (*allocated >= need)
5805 a = MAX(64u, need * 2);
5807 /* check for overflows */
5820 void* greedy_realloc0(void **p, size_t *allocated, size_t need) {
5829 q = greedy_realloc(p, allocated, need);
5833 if (*allocated > prev)
5834 memzero(&q[prev], *allocated - prev);
5839 bool id128_is_valid(const char *s) {
5845 /* Simple formatted 128bit hex string */
5847 for (i = 0; i < l; i++) {
5850 if (!(c >= '0' && c <= '9') &&
5851 !(c >= 'a' && c <= 'z') &&
5852 !(c >= 'A' && c <= 'Z'))
5856 } else if (l == 36) {
5858 /* Formatted UUID */
5860 for (i = 0; i < l; i++) {
5863 if ((i == 8 || i == 13 || i == 18 || i == 23)) {
5867 if (!(c >= '0' && c <= '9') &&
5868 !(c >= 'a' && c <= 'z') &&
5869 !(c >= 'A' && c <= 'Z'))
5880 int split_pair(const char *s, const char *sep, char **l, char **r) {
5895 a = strndup(s, x - s);
5899 b = strdup(x + strlen(sep));
5911 int shall_restore_state(void) {
5912 _cleanup_free_ char *line;
5917 r = proc_cmdline(&line);
5920 if (r == 0) /* Container ... */
5923 FOREACH_WORD_QUOTED(w, l, line, state)
5924 if (l == 23 && strneq(w, "systemd.restore_state=0", 23))
5930 int proc_cmdline(char **ret) {
5933 if (detect_container(NULL) > 0) {
5934 char *buf = NULL, *p;
5937 r = read_full_file("/proc/1/cmdline", &buf, &sz);
5941 for (p = buf; p + 1 < buf + sz; p++)
5950 r = read_one_line_file("/proc/cmdline", ret);
5957 int parse_proc_cmdline(int (*parse_word)(const char *word)) {
5958 _cleanup_free_ char *line = NULL;
5963 r = proc_cmdline(&line);
5965 log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
5969 FOREACH_WORD_QUOTED(w, l, line, state) {
5970 _cleanup_free_ char *word;
5972 word = strndup(w, l);
5976 r = parse_word(word);
5978 log_error("Failed on cmdline argument %s: %s", word, strerror(-r));
5986 int container_get_leader(const char *machine, pid_t *pid) {
5987 _cleanup_free_ char *s = NULL, *class = NULL;
5995 p = strappenda("/run/systemd/machines/", machine);
5996 r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL);
6004 if (!streq_ptr(class, "container"))
6007 r = parse_pid(s, &leader);
6017 int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *root_fd) {
6018 _cleanup_close_ int pidnsfd = -1, mntnsfd = -1;
6019 const char *pidns, *mntns, *root;
6027 mntns = procfs_file_alloca(pid, "ns/mnt");
6028 mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
6032 pidns = procfs_file_alloca(pid, "ns/pid");
6033 pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
6037 root = procfs_file_alloca(pid, "root");
6038 rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY);
6042 *pidns_fd = pidnsfd;
6043 *mntns_fd = mntnsfd;
6051 int namespace_enter(int pidns_fd, int mntns_fd, int root_fd) {
6052 assert(pidns_fd >= 0);
6053 assert(mntns_fd >= 0);
6054 assert(root_fd >= 0);
6056 if (setns(pidns_fd, CLONE_NEWPID) < 0)
6059 if (setns(mntns_fd, CLONE_NEWNS) < 0)
6062 if (fchdir(root_fd) < 0)
6065 if (chroot(".") < 0)
6068 if (setresgid(0, 0, 0) < 0)
6071 if (setresuid(0, 0, 0) < 0)
6077 bool pid_is_unwaited(pid_t pid) {
6078 /* Checks whether a PID is still valid at all, including a zombie */
6083 if (kill(pid, 0) >= 0)
6086 return errno != ESRCH;
6089 bool pid_is_alive(pid_t pid) {
6092 /* Checks whether a PID is still valid and not a zombie */
6097 r = get_process_state(pid);
6098 if (r == -ENOENT || r == 'Z')
6104 int getpeercred(int fd, struct ucred *ucred) {
6105 socklen_t n = sizeof(struct ucred);
6112 r = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &u, &n);
6116 if (n != sizeof(struct ucred))
6119 /* Check if the data is actually useful and not suppressed due
6120 * to namespacing issues */
6128 int getpeersec(int fd, char **ret) {
6140 r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n);
6144 if (errno != ERANGE)
6151 r = getsockopt(fd, SOL_SOCKET, SO_PEERSEC, s, &n);
6167 /* This is much like like mkostemp() but is subject to umask(). */
6168 int mkostemp_safe(char *pattern, int flags) {
6169 _cleanup_umask_ mode_t u;
6176 fd = mkostemp(pattern, flags);
6183 int open_tmpfile(const char *path, int flags) {
6190 /* Try O_TMPFILE first, if it is supported */
6191 fd = open(path, flags|O_TMPFILE, S_IRUSR|S_IWUSR);
6196 /* Fall back to unguessable name + unlinking */
6197 p = strappenda(path, "/systemd-tmp-XXXXXX");
6199 fd = mkostemp_safe(p, flags);
6207 int fd_warn_permissions(const char *path, int fd) {
6210 if (fstat(fd, &st) < 0)
6213 if (st.st_mode & 0111)
6214 log_warning("Configuration file %s is marked executable. Please remove executable permission bits. Proceeding anyway.", path);
6216 if (st.st_mode & 0002)
6217 log_warning("Configuration file %s is marked world-writable. Please remove world writability permission bits. Proceeding anyway.", path);
6219 if (getpid() == 1 && (st.st_mode & 0044) != 0044)
6220 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);
6225 unsigned long personality_from_string(const char *p) {
6227 /* Parse a personality specifier. We introduce our own
6228 * identifiers that indicate specific ABIs, rather than just
6229 * hints regarding the register size, since we want to keep
6230 * things open for multiple locally supported ABIs for the
6231 * same register size. We try to reuse the ABI identifiers
6232 * used by libseccomp. */
6234 #if defined(__x86_64__)
6236 if (streq(p, "x86"))
6239 if (streq(p, "x86-64"))
6242 #elif defined(__i386__)
6244 if (streq(p, "x86"))
6248 /* personality(7) documents that 0xffffffffUL is used for
6249 * querying the current personality, hence let's use that here
6250 * as error indicator. */
6251 return 0xffffffffUL;
6254 const char* personality_to_string(unsigned long p) {
6256 #if defined(__x86_64__)
6258 if (p == PER_LINUX32)
6264 #elif defined(__i386__)