1651 lines
44 KiB
C
1651 lines
44 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
|
||
|
||
/***
|
||
This file is part of systemd.
|
||
|
||
Copyright 2010 Lennart Poettering
|
||
|
||
systemd is free software; you can redistribute it and/or modify it
|
||
under the terms of the GNU Lesser General Public License as published by
|
||
the Free Software Foundation; either version 2.1 of the License, or
|
||
(at your option) any later version.
|
||
|
||
systemd is distributed in the hope that it will be useful, but
|
||
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
Lesser General Public License for more details.
|
||
|
||
You should have received a copy of the GNU Lesser General Public License
|
||
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
||
***/
|
||
|
||
#include <ctype.h>
|
||
#include <dirent.h>
|
||
#include <errno.h>
|
||
#include <fcntl.h>
|
||
#include <glob.h>
|
||
#include <grp.h>
|
||
#include <langinfo.h>
|
||
#include <libintl.h>
|
||
#include <limits.h>
|
||
#include <linux/magic.h>
|
||
#include <linux/oom.h>
|
||
#include <linux/sched.h>
|
||
#include <locale.h>
|
||
#include <poll.h>
|
||
#include <pwd.h>
|
||
#include <sched.h>
|
||
#include <signal.h>
|
||
#include <stdarg.h>
|
||
#include <stdio.h>
|
||
#include <stdlib.h>
|
||
#include <string.h>
|
||
#include <sys/file.h>
|
||
#include <sys/ioctl.h>
|
||
#include <sys/mman.h>
|
||
#include <sys/mount.h>
|
||
#include <sys/personality.h>
|
||
#include <sys/prctl.h>
|
||
#include <sys/stat.h>
|
||
#include <sys/statvfs.h>
|
||
#include <sys/time.h>
|
||
#include <sys/types.h>
|
||
#include <sys/utsname.h>
|
||
#include <sys/vfs.h>
|
||
#include <sys/wait.h>
|
||
#include <syslog.h>
|
||
#include <unistd.h>
|
||
|
||
/* When we include libgen.h because we need dirname() we immediately
|
||
* undefine basename() since libgen.h defines it as a macro to the
|
||
* POSIX version which is really broken. We prefer GNU basename(). */
|
||
#include <libgen.h>
|
||
#undef basename
|
||
|
||
#ifdef HAVE_SYS_AUXV_H
|
||
#include <sys/auxv.h>
|
||
#endif
|
||
|
||
/* We include linux/fs.h as last of the system headers, as it
|
||
* otherwise conflicts with sys/mount.h. Yay, Linux is great! */
|
||
#include <linux/fs.h>
|
||
|
||
#include "build.h"
|
||
#include "def.h"
|
||
#include "device-nodes.h"
|
||
#include "env-util.h"
|
||
#include "escape.h"
|
||
#include "exit-status.h"
|
||
#include "fd-util.h"
|
||
#include "fileio.h"
|
||
#include "formats-util.h"
|
||
#include "gunicode.h"
|
||
#include "hashmap.h"
|
||
#include "hostname-util.h"
|
||
#include "ioprio.h"
|
||
#include "log.h"
|
||
#include "macro.h"
|
||
#include "missing.h"
|
||
#include "mkdir.h"
|
||
#include "hexdecoct.h"
|
||
#include "parse-util.h"
|
||
#include "path-util.h"
|
||
#include "process-util.h"
|
||
#include "random-util.h"
|
||
#include "signal-util.h"
|
||
#include "sparse-endian.h"
|
||
#include "string-util.h"
|
||
#include "strv.h"
|
||
#include "terminal-util.h"
|
||
#include "user-util.h"
|
||
#include "utf8.h"
|
||
#include "util.h"
|
||
#include "virt.h"
|
||
#include "dirent-util.h"
|
||
|
||
/* Put this test here for a lack of better place */
|
||
assert_cc(EAGAIN == EWOULDBLOCK);
|
||
|
||
int saved_argc = 0;
|
||
char **saved_argv = NULL;
|
||
|
||
size_t page_size(void) {
|
||
static thread_local size_t pgsz = 0;
|
||
long r;
|
||
|
||
if (_likely_(pgsz > 0))
|
||
return pgsz;
|
||
|
||
r = sysconf(_SC_PAGESIZE);
|
||
assert(r > 0);
|
||
|
||
pgsz = (size_t) r;
|
||
return pgsz;
|
||
}
|
||
|
||
bool fstype_is_network(const char *fstype) {
|
||
static const char table[] =
|
||
"afs\0"
|
||
"cifs\0"
|
||
"smbfs\0"
|
||
"sshfs\0"
|
||
"ncpfs\0"
|
||
"ncp\0"
|
||
"nfs\0"
|
||
"nfs4\0"
|
||
"gfs\0"
|
||
"gfs2\0"
|
||
"glusterfs\0";
|
||
|
||
const char *x;
|
||
|
||
x = startswith(fstype, "fuse.");
|
||
if (x)
|
||
fstype = x;
|
||
|
||
return nulstr_contains(table, fstype);
|
||
}
|
||
|
||
int dir_is_empty(const char *path) {
|
||
_cleanup_closedir_ DIR *d;
|
||
struct dirent *de;
|
||
|
||
d = opendir(path);
|
||
if (!d)
|
||
return -errno;
|
||
|
||
FOREACH_DIRENT(de, d, return -errno)
|
||
return 0;
|
||
|
||
return 1;
|
||
}
|
||
|
||
void rename_process(const char name[8]) {
|
||
assert(name);
|
||
|
||
/* This is a like a poor man's setproctitle(). It changes the
|
||
* comm field, argv[0], and also the glibc's internally used
|
||
* name of the process. For the first one a limit of 16 chars
|
||
* applies, to the second one usually one of 10 (i.e. length
|
||
* of "/sbin/init"), to the third one one of 7 (i.e. length of
|
||
* "systemd"). If you pass a longer string it will be
|
||
* truncated */
|
||
|
||
prctl(PR_SET_NAME, name);
|
||
|
||
if (program_invocation_name)
|
||
strncpy(program_invocation_name, name, strlen(program_invocation_name));
|
||
|
||
if (saved_argc > 0) {
|
||
int i;
|
||
|
||
if (saved_argv[0])
|
||
strncpy(saved_argv[0], name, strlen(saved_argv[0]));
|
||
|
||
for (i = 1; i < saved_argc; i++) {
|
||
if (!saved_argv[i])
|
||
break;
|
||
|
||
memzero(saved_argv[i], strlen(saved_argv[i]));
|
||
}
|
||
}
|
||
}
|
||
|
||
bool is_fs_type(const struct statfs *s, statfs_f_type_t magic_value) {
|
||
assert(s);
|
||
assert_cc(sizeof(statfs_f_type_t) >= sizeof(s->f_type));
|
||
|
||
return F_TYPE_EQUAL(s->f_type, magic_value);
|
||
}
|
||
|
||
int fd_check_fstype(int fd, statfs_f_type_t magic_value) {
|
||
struct statfs s;
|
||
|
||
if (fstatfs(fd, &s) < 0)
|
||
return -errno;
|
||
|
||
return is_fs_type(&s, magic_value);
|
||
}
|
||
|
||
int path_check_fstype(const char *path, statfs_f_type_t magic_value) {
|
||
_cleanup_close_ int fd = -1;
|
||
|
||
fd = open(path, O_RDONLY);
|
||
if (fd < 0)
|
||
return -errno;
|
||
|
||
return fd_check_fstype(fd, magic_value);
|
||
}
|
||
|
||
bool is_temporary_fs(const struct statfs *s) {
|
||
return is_fs_type(s, TMPFS_MAGIC) ||
|
||
is_fs_type(s, RAMFS_MAGIC);
|
||
}
|
||
|
||
int fd_is_temporary_fs(int fd) {
|
||
struct statfs s;
|
||
|
||
if (fstatfs(fd, &s) < 0)
|
||
return -errno;
|
||
|
||
return is_temporary_fs(&s);
|
||
}
|
||
|
||
int files_same(const char *filea, const char *fileb) {
|
||
struct stat a, b;
|
||
|
||
if (stat(filea, &a) < 0)
|
||
return -errno;
|
||
|
||
if (stat(fileb, &b) < 0)
|
||
return -errno;
|
||
|
||
return a.st_dev == b.st_dev &&
|
||
a.st_ino == b.st_ino;
|
||
}
|
||
|
||
int running_in_chroot(void) {
|
||
int ret;
|
||
|
||
ret = files_same("/proc/1/root", "/");
|
||
if (ret < 0)
|
||
return ret;
|
||
|
||
return ret == 0;
|
||
}
|
||
|
||
noreturn void freeze(void) {
|
||
|
||
/* Make sure nobody waits for us on a socket anymore */
|
||
close_all_fds(NULL, 0);
|
||
|
||
sync();
|
||
|
||
for (;;)
|
||
pause();
|
||
}
|
||
|
||
bool null_or_empty(struct stat *st) {
|
||
assert(st);
|
||
|
||
if (S_ISREG(st->st_mode) && st->st_size <= 0)
|
||
return true;
|
||
|
||
if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode))
|
||
return true;
|
||
|
||
return false;
|
||
}
|
||
|
||
int null_or_empty_path(const char *fn) {
|
||
struct stat st;
|
||
|
||
assert(fn);
|
||
|
||
if (stat(fn, &st) < 0)
|
||
return -errno;
|
||
|
||
return null_or_empty(&st);
|
||
}
|
||
|
||
int null_or_empty_fd(int fd) {
|
||
struct stat st;
|
||
|
||
assert(fd >= 0);
|
||
|
||
if (fstat(fd, &st) < 0)
|
||
return -errno;
|
||
|
||
return null_or_empty(&st);
|
||
}
|
||
|
||
static int do_execute(char **directories, usec_t timeout, char *argv[]) {
|
||
_cleanup_hashmap_free_free_ Hashmap *pids = NULL;
|
||
_cleanup_set_free_free_ Set *seen = NULL;
|
||
char **directory;
|
||
|
||
/* We fork this all off from a child process so that we can
|
||
* somewhat cleanly make use of SIGALRM to set a time limit */
|
||
|
||
(void) reset_all_signal_handlers();
|
||
(void) reset_signal_mask();
|
||
|
||
assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0);
|
||
|
||
pids = hashmap_new(NULL);
|
||
if (!pids)
|
||
return log_oom();
|
||
|
||
seen = set_new(&string_hash_ops);
|
||
if (!seen)
|
||
return log_oom();
|
||
|
||
STRV_FOREACH(directory, directories) {
|
||
_cleanup_closedir_ DIR *d;
|
||
struct dirent *de;
|
||
|
||
d = opendir(*directory);
|
||
if (!d) {
|
||
if (errno == ENOENT)
|
||
continue;
|
||
|
||
return log_error_errno(errno, "Failed to open directory %s: %m", *directory);
|
||
}
|
||
|
||
FOREACH_DIRENT(de, d, break) {
|
||
_cleanup_free_ char *path = NULL;
|
||
pid_t pid;
|
||
int r;
|
||
|
||
if (!dirent_is_file(de))
|
||
continue;
|
||
|
||
if (set_contains(seen, de->d_name)) {
|
||
log_debug("%1$s/%2$s skipped (%2$s was already seen).", *directory, de->d_name);
|
||
continue;
|
||
}
|
||
|
||
r = set_put_strdup(seen, de->d_name);
|
||
if (r < 0)
|
||
return log_oom();
|
||
|
||
path = strjoin(*directory, "/", de->d_name, NULL);
|
||
if (!path)
|
||
return log_oom();
|
||
|
||
if (null_or_empty_path(path)) {
|
||
log_debug("%s is empty (a mask).", path);
|
||
continue;
|
||
}
|
||
|
||
pid = fork();
|
||
if (pid < 0) {
|
||
log_error_errno(errno, "Failed to fork: %m");
|
||
continue;
|
||
} else if (pid == 0) {
|
||
char *_argv[2];
|
||
|
||
assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0);
|
||
|
||
if (!argv) {
|
||
_argv[0] = path;
|
||
_argv[1] = NULL;
|
||
argv = _argv;
|
||
} else
|
||
argv[0] = path;
|
||
|
||
execv(path, argv);
|
||
return log_error_errno(errno, "Failed to execute %s: %m", path);
|
||
}
|
||
|
||
log_debug("Spawned %s as " PID_FMT ".", path, pid);
|
||
|
||
r = hashmap_put(pids, UINT_TO_PTR(pid), path);
|
||
if (r < 0)
|
||
return log_oom();
|
||
path = NULL;
|
||
}
|
||
}
|
||
|
||
/* Abort execution of this process after the timout. We simply
|
||
* rely on SIGALRM as default action terminating the process,
|
||
* and turn on alarm(). */
|
||
|
||
if (timeout != USEC_INFINITY)
|
||
alarm((timeout + USEC_PER_SEC - 1) / USEC_PER_SEC);
|
||
|
||
while (!hashmap_isempty(pids)) {
|
||
_cleanup_free_ char *path = NULL;
|
||
pid_t pid;
|
||
|
||
pid = PTR_TO_UINT(hashmap_first_key(pids));
|
||
assert(pid > 0);
|
||
|
||
path = hashmap_remove(pids, UINT_TO_PTR(pid));
|
||
assert(path);
|
||
|
||
wait_for_terminate_and_warn(path, pid, true);
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
void execute_directories(const char* const* directories, usec_t timeout, char *argv[]) {
|
||
pid_t executor_pid;
|
||
int r;
|
||
char *name;
|
||
char **dirs = (char**) directories;
|
||
|
||
assert(!strv_isempty(dirs));
|
||
|
||
name = basename(dirs[0]);
|
||
assert(!isempty(name));
|
||
|
||
/* Executes all binaries in the directories in parallel and waits
|
||
* for them to finish. Optionally a timeout is applied. If a file
|
||
* with the same name exists in more than one directory, the
|
||
* earliest one wins. */
|
||
|
||
executor_pid = fork();
|
||
if (executor_pid < 0) {
|
||
log_error_errno(errno, "Failed to fork: %m");
|
||
return;
|
||
|
||
} else if (executor_pid == 0) {
|
||
r = do_execute(dirs, timeout, argv);
|
||
_exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS);
|
||
}
|
||
|
||
wait_for_terminate_and_warn(name, executor_pid, true);
|
||
}
|
||
|
||
bool plymouth_running(void) {
|
||
return access("/run/plymouth/pid", F_OK) >= 0;
|
||
}
|
||
|
||
bool display_is_local(const char *display) {
|
||
assert(display);
|
||
|
||
return
|
||
display[0] == ':' &&
|
||
display[1] >= '0' &&
|
||
display[1] <= '9';
|
||
}
|
||
|
||
int socket_from_display(const char *display, char **path) {
|
||
size_t k;
|
||
char *f, *c;
|
||
|
||
assert(display);
|
||
assert(path);
|
||
|
||
if (!display_is_local(display))
|
||
return -EINVAL;
|
||
|
||
k = strspn(display+1, "0123456789");
|
||
|
||
f = new(char, strlen("/tmp/.X11-unix/X") + k + 1);
|
||
if (!f)
|
||
return -ENOMEM;
|
||
|
||
c = stpcpy(f, "/tmp/.X11-unix/X");
|
||
memcpy(c, display+1, k);
|
||
c[k] = 0;
|
||
|
||
*path = f;
|
||
|
||
return 0;
|
||
}
|
||
|
||
int glob_exists(const char *path) {
|
||
_cleanup_globfree_ glob_t g = {};
|
||
int k;
|
||
|
||
assert(path);
|
||
|
||
errno = 0;
|
||
k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g);
|
||
|
||
if (k == GLOB_NOMATCH)
|
||
return 0;
|
||
else if (k == GLOB_NOSPACE)
|
||
return -ENOMEM;
|
||
else if (k == 0)
|
||
return !strv_isempty(g.gl_pathv);
|
||
else
|
||
return errno ? -errno : -EIO;
|
||
}
|
||
|
||
int glob_extend(char ***strv, const char *path) {
|
||
_cleanup_globfree_ glob_t g = {};
|
||
int k;
|
||
char **p;
|
||
|
||
errno = 0;
|
||
k = glob(path, GLOB_NOSORT|GLOB_BRACE, NULL, &g);
|
||
|
||
if (k == GLOB_NOMATCH)
|
||
return -ENOENT;
|
||
else if (k == GLOB_NOSPACE)
|
||
return -ENOMEM;
|
||
else if (k != 0 || strv_isempty(g.gl_pathv))
|
||
return errno ? -errno : -EIO;
|
||
|
||
STRV_FOREACH(p, g.gl_pathv) {
|
||
k = strv_extend(strv, *p);
|
||
if (k < 0)
|
||
break;
|
||
}
|
||
|
||
return k;
|
||
}
|
||
|
||
bool is_main_thread(void) {
|
||
static thread_local int cached = 0;
|
||
|
||
if (_unlikely_(cached == 0))
|
||
cached = getpid() == gettid() ? 1 : -1;
|
||
|
||
return cached > 0;
|
||
}
|
||
|
||
int block_get_whole_disk(dev_t d, dev_t *ret) {
|
||
char *p, *s;
|
||
int r;
|
||
unsigned n, m;
|
||
|
||
assert(ret);
|
||
|
||
/* If it has a queue this is good enough for us */
|
||
if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0)
|
||
return -ENOMEM;
|
||
|
||
r = access(p, F_OK);
|
||
free(p);
|
||
|
||
if (r >= 0) {
|
||
*ret = d;
|
||
return 0;
|
||
}
|
||
|
||
/* If it is a partition find the originating device */
|
||
if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0)
|
||
return -ENOMEM;
|
||
|
||
r = access(p, F_OK);
|
||
free(p);
|
||
|
||
if (r < 0)
|
||
return -ENOENT;
|
||
|
||
/* Get parent dev_t */
|
||
if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0)
|
||
return -ENOMEM;
|
||
|
||
r = read_one_line_file(p, &s);
|
||
free(p);
|
||
|
||
if (r < 0)
|
||
return r;
|
||
|
||
r = sscanf(s, "%u:%u", &m, &n);
|
||
free(s);
|
||
|
||
if (r != 2)
|
||
return -EINVAL;
|
||
|
||
/* Only return this if it is really good enough for us. */
|
||
if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0)
|
||
return -ENOMEM;
|
||
|
||
r = access(p, F_OK);
|
||
free(p);
|
||
|
||
if (r >= 0) {
|
||
*ret = makedev(m, n);
|
||
return 0;
|
||
}
|
||
|
||
return -ENOENT;
|
||
}
|
||
|
||
static const char *const ioprio_class_table[] = {
|
||
[IOPRIO_CLASS_NONE] = "none",
|
||
[IOPRIO_CLASS_RT] = "realtime",
|
||
[IOPRIO_CLASS_BE] = "best-effort",
|
||
[IOPRIO_CLASS_IDLE] = "idle"
|
||
};
|
||
|
||
DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, INT_MAX);
|
||
|
||
static const char *const sigchld_code_table[] = {
|
||
[CLD_EXITED] = "exited",
|
||
[CLD_KILLED] = "killed",
|
||
[CLD_DUMPED] = "dumped",
|
||
[CLD_TRAPPED] = "trapped",
|
||
[CLD_STOPPED] = "stopped",
|
||
[CLD_CONTINUED] = "continued",
|
||
};
|
||
|
||
DEFINE_STRING_TABLE_LOOKUP(sigchld_code, int);
|
||
|
||
static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = {
|
||
[LOG_FAC(LOG_KERN)] = "kern",
|
||
[LOG_FAC(LOG_USER)] = "user",
|
||
[LOG_FAC(LOG_MAIL)] = "mail",
|
||
[LOG_FAC(LOG_DAEMON)] = "daemon",
|
||
[LOG_FAC(LOG_AUTH)] = "auth",
|
||
[LOG_FAC(LOG_SYSLOG)] = "syslog",
|
||
[LOG_FAC(LOG_LPR)] = "lpr",
|
||
[LOG_FAC(LOG_NEWS)] = "news",
|
||
[LOG_FAC(LOG_UUCP)] = "uucp",
|
||
[LOG_FAC(LOG_CRON)] = "cron",
|
||
[LOG_FAC(LOG_AUTHPRIV)] = "authpriv",
|
||
[LOG_FAC(LOG_FTP)] = "ftp",
|
||
[LOG_FAC(LOG_LOCAL0)] = "local0",
|
||
[LOG_FAC(LOG_LOCAL1)] = "local1",
|
||
[LOG_FAC(LOG_LOCAL2)] = "local2",
|
||
[LOG_FAC(LOG_LOCAL3)] = "local3",
|
||
[LOG_FAC(LOG_LOCAL4)] = "local4",
|
||
[LOG_FAC(LOG_LOCAL5)] = "local5",
|
||
[LOG_FAC(LOG_LOCAL6)] = "local6",
|
||
[LOG_FAC(LOG_LOCAL7)] = "local7"
|
||
};
|
||
|
||
DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0));
|
||
|
||
bool log_facility_unshifted_is_valid(int facility) {
|
||
return facility >= 0 && facility <= LOG_FAC(~0);
|
||
}
|
||
|
||
static const char *const log_level_table[] = {
|
||
[LOG_EMERG] = "emerg",
|
||
[LOG_ALERT] = "alert",
|
||
[LOG_CRIT] = "crit",
|
||
[LOG_ERR] = "err",
|
||
[LOG_WARNING] = "warning",
|
||
[LOG_NOTICE] = "notice",
|
||
[LOG_INFO] = "info",
|
||
[LOG_DEBUG] = "debug"
|
||
};
|
||
|
||
DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG);
|
||
|
||
bool log_level_is_valid(int level) {
|
||
return level >= 0 && level <= LOG_DEBUG;
|
||
}
|
||
|
||
static const char* const sched_policy_table[] = {
|
||
[SCHED_OTHER] = "other",
|
||
[SCHED_BATCH] = "batch",
|
||
[SCHED_IDLE] = "idle",
|
||
[SCHED_FIFO] = "fifo",
|
||
[SCHED_RR] = "rr"
|
||
};
|
||
|
||
DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX);
|
||
|
||
bool kexec_loaded(void) {
|
||
bool loaded = false;
|
||
char *s;
|
||
|
||
if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) {
|
||
if (s[0] == '1')
|
||
loaded = true;
|
||
free(s);
|
||
}
|
||
return loaded;
|
||
}
|
||
|
||
int prot_from_flags(int flags) {
|
||
|
||
switch (flags & O_ACCMODE) {
|
||
|
||
case O_RDONLY:
|
||
return PROT_READ;
|
||
|
||
case O_WRONLY:
|
||
return PROT_WRITE;
|
||
|
||
case O_RDWR:
|
||
return PROT_READ|PROT_WRITE;
|
||
|
||
default:
|
||
return -EINVAL;
|
||
}
|
||
}
|
||
|
||
void* memdup(const void *p, size_t l) {
|
||
void *r;
|
||
|
||
assert(p);
|
||
|
||
r = malloc(l);
|
||
if (!r)
|
||
return NULL;
|
||
|
||
memcpy(r, p, l);
|
||
return r;
|
||
}
|
||
|
||
int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) {
|
||
bool stdout_is_tty, stderr_is_tty;
|
||
pid_t parent_pid, agent_pid;
|
||
sigset_t ss, saved_ss;
|
||
unsigned n, i;
|
||
va_list ap;
|
||
char **l;
|
||
|
||
assert(pid);
|
||
assert(path);
|
||
|
||
/* Spawns a temporary TTY agent, making sure it goes away when
|
||
* we go away */
|
||
|
||
parent_pid = getpid();
|
||
|
||
/* First we temporarily block all signals, so that the new
|
||
* child has them blocked initially. This way, we can be sure
|
||
* that SIGTERMs are not lost we might send to the agent. */
|
||
assert_se(sigfillset(&ss) >= 0);
|
||
assert_se(sigprocmask(SIG_SETMASK, &ss, &saved_ss) >= 0);
|
||
|
||
agent_pid = fork();
|
||
if (agent_pid < 0) {
|
||
assert_se(sigprocmask(SIG_SETMASK, &saved_ss, NULL) >= 0);
|
||
return -errno;
|
||
}
|
||
|
||
if (agent_pid != 0) {
|
||
assert_se(sigprocmask(SIG_SETMASK, &saved_ss, NULL) >= 0);
|
||
*pid = agent_pid;
|
||
return 0;
|
||
}
|
||
|
||
/* In the child:
|
||
*
|
||
* Make sure the agent goes away when the parent dies */
|
||
if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0)
|
||
_exit(EXIT_FAILURE);
|
||
|
||
/* Make sure we actually can kill the agent, if we need to, in
|
||
* case somebody invoked us from a shell script that trapped
|
||
* SIGTERM or so... */
|
||
(void) reset_all_signal_handlers();
|
||
(void) reset_signal_mask();
|
||
|
||
/* Check whether our parent died before we were able
|
||
* to set the death signal and unblock the signals */
|
||
if (getppid() != parent_pid)
|
||
_exit(EXIT_SUCCESS);
|
||
|
||
/* Don't leak fds to the agent */
|
||
close_all_fds(except, n_except);
|
||
|
||
stdout_is_tty = isatty(STDOUT_FILENO);
|
||
stderr_is_tty = isatty(STDERR_FILENO);
|
||
|
||
if (!stdout_is_tty || !stderr_is_tty) {
|
||
int fd;
|
||
|
||
/* Detach from stdout/stderr. and reopen
|
||
* /dev/tty for them. This is important to
|
||
* ensure that when systemctl is started via
|
||
* popen() or a similar call that expects to
|
||
* read EOF we actually do generate EOF and
|
||
* not delay this indefinitely by because we
|
||
* keep an unused copy of stdin around. */
|
||
fd = open("/dev/tty", O_WRONLY);
|
||
if (fd < 0) {
|
||
log_error_errno(errno, "Failed to open /dev/tty: %m");
|
||
_exit(EXIT_FAILURE);
|
||
}
|
||
|
||
if (!stdout_is_tty)
|
||
dup2(fd, STDOUT_FILENO);
|
||
|
||
if (!stderr_is_tty)
|
||
dup2(fd, STDERR_FILENO);
|
||
|
||
if (fd > 2)
|
||
close(fd);
|
||
}
|
||
|
||
/* Count arguments */
|
||
va_start(ap, path);
|
||
for (n = 0; va_arg(ap, char*); n++)
|
||
;
|
||
va_end(ap);
|
||
|
||
/* Allocate strv */
|
||
l = alloca(sizeof(char *) * (n + 1));
|
||
|
||
/* Fill in arguments */
|
||
va_start(ap, path);
|
||
for (i = 0; i <= n; i++)
|
||
l[i] = va_arg(ap, char*);
|
||
va_end(ap);
|
||
|
||
execv(path, l);
|
||
_exit(EXIT_FAILURE);
|
||
}
|
||
|
||
bool http_etag_is_valid(const char *etag) {
|
||
if (isempty(etag))
|
||
return false;
|
||
|
||
if (!endswith(etag, "\""))
|
||
return false;
|
||
|
||
if (!startswith(etag, "\"") && !startswith(etag, "W/\""))
|
||
return false;
|
||
|
||
return true;
|
||
}
|
||
|
||
bool http_url_is_valid(const char *url) {
|
||
const char *p;
|
||
|
||
if (isempty(url))
|
||
return false;
|
||
|
||
p = startswith(url, "http://");
|
||
if (!p)
|
||
p = startswith(url, "https://");
|
||
if (!p)
|
||
return false;
|
||
|
||
if (isempty(p))
|
||
return false;
|
||
|
||
return ascii_is_valid(p);
|
||
}
|
||
|
||
bool documentation_url_is_valid(const char *url) {
|
||
const char *p;
|
||
|
||
if (isempty(url))
|
||
return false;
|
||
|
||
if (http_url_is_valid(url))
|
||
return true;
|
||
|
||
p = startswith(url, "file:/");
|
||
if (!p)
|
||
p = startswith(url, "info:");
|
||
if (!p)
|
||
p = startswith(url, "man:");
|
||
|
||
if (isempty(p))
|
||
return false;
|
||
|
||
return ascii_is_valid(p);
|
||
}
|
||
|
||
bool in_initrd(void) {
|
||
static int saved = -1;
|
||
struct statfs s;
|
||
|
||
if (saved >= 0)
|
||
return saved;
|
||
|
||
/* We make two checks here:
|
||
*
|
||
* 1. the flag file /etc/initrd-release must exist
|
||
* 2. the root file system must be a memory file system
|
||
*
|
||
* The second check is extra paranoia, since misdetecting an
|
||
* initrd can have bad bad consequences due the initrd
|
||
* emptying when transititioning to the main systemd.
|
||
*/
|
||
|
||
saved = access("/etc/initrd-release", F_OK) >= 0 &&
|
||
statfs("/", &s) >= 0 &&
|
||
is_temporary_fs(&s);
|
||
|
||
return saved;
|
||
}
|
||
|
||
bool string_is_safe(const char *p) {
|
||
const char *t;
|
||
|
||
if (!p)
|
||
return false;
|
||
|
||
for (t = p; *t; t++) {
|
||
if (*t > 0 && *t < ' ')
|
||
return false;
|
||
|
||
if (strchr("\\\"\'\x7f", *t))
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* hey glibc, APIs with callbacks without a user pointer are so useless */
|
||
void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
|
||
int (*compar) (const void *, const void *, void *), void *arg) {
|
||
size_t l, u, idx;
|
||
const void *p;
|
||
int comparison;
|
||
|
||
l = 0;
|
||
u = nmemb;
|
||
while (l < u) {
|
||
idx = (l + u) / 2;
|
||
p = (void *)(((const char *) base) + (idx * size));
|
||
comparison = compar(key, p, arg);
|
||
if (comparison < 0)
|
||
u = idx;
|
||
else if (comparison > 0)
|
||
l = idx + 1;
|
||
else
|
||
return (void *)p;
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
void init_gettext(void) {
|
||
setlocale(LC_ALL, "");
|
||
textdomain(GETTEXT_PACKAGE);
|
||
}
|
||
|
||
bool is_locale_utf8(void) {
|
||
const char *set;
|
||
static int cached_answer = -1;
|
||
|
||
if (cached_answer >= 0)
|
||
goto out;
|
||
|
||
if (!setlocale(LC_ALL, "")) {
|
||
cached_answer = true;
|
||
goto out;
|
||
}
|
||
|
||
set = nl_langinfo(CODESET);
|
||
if (!set) {
|
||
cached_answer = true;
|
||
goto out;
|
||
}
|
||
|
||
if (streq(set, "UTF-8")) {
|
||
cached_answer = true;
|
||
goto out;
|
||
}
|
||
|
||
/* For LC_CTYPE=="C" return true, because CTYPE is effectly
|
||
* unset and everything can do to UTF-8 nowadays. */
|
||
set = setlocale(LC_CTYPE, NULL);
|
||
if (!set) {
|
||
cached_answer = true;
|
||
goto out;
|
||
}
|
||
|
||
/* Check result, but ignore the result if C was set
|
||
* explicitly. */
|
||
cached_answer =
|
||
STR_IN_SET(set, "C", "POSIX") &&
|
||
!getenv("LC_ALL") &&
|
||
!getenv("LC_CTYPE") &&
|
||
!getenv("LANG");
|
||
|
||
out:
|
||
return (bool) cached_answer;
|
||
}
|
||
|
||
const char *draw_special_char(DrawSpecialChar ch) {
|
||
static const char *draw_table[2][_DRAW_SPECIAL_CHAR_MAX] = {
|
||
|
||
/* UTF-8 */ {
|
||
[DRAW_TREE_VERTICAL] = "\342\224\202 ", /* │ */
|
||
[DRAW_TREE_BRANCH] = "\342\224\234\342\224\200", /* ├─ */
|
||
[DRAW_TREE_RIGHT] = "\342\224\224\342\224\200", /* └─ */
|
||
[DRAW_TREE_SPACE] = " ", /* */
|
||
[DRAW_TRIANGULAR_BULLET] = "\342\200\243", /* ‣ */
|
||
[DRAW_BLACK_CIRCLE] = "\342\227\217", /* ● */
|
||
[DRAW_ARROW] = "\342\206\222", /* → */
|
||
[DRAW_DASH] = "\342\200\223", /* – */
|
||
},
|
||
|
||
/* ASCII fallback */ {
|
||
[DRAW_TREE_VERTICAL] = "| ",
|
||
[DRAW_TREE_BRANCH] = "|-",
|
||
[DRAW_TREE_RIGHT] = "`-",
|
||
[DRAW_TREE_SPACE] = " ",
|
||
[DRAW_TRIANGULAR_BULLET] = ">",
|
||
[DRAW_BLACK_CIRCLE] = "*",
|
||
[DRAW_ARROW] = "->",
|
||
[DRAW_DASH] = "-",
|
||
}
|
||
};
|
||
|
||
return draw_table[!is_locale_utf8()][ch];
|
||
}
|
||
|
||
int on_ac_power(void) {
|
||
bool found_offline = false, found_online = false;
|
||
_cleanup_closedir_ DIR *d = NULL;
|
||
|
||
d = opendir("/sys/class/power_supply");
|
||
if (!d)
|
||
return errno == ENOENT ? true : -errno;
|
||
|
||
for (;;) {
|
||
struct dirent *de;
|
||
_cleanup_close_ int fd = -1, device = -1;
|
||
char contents[6];
|
||
ssize_t n;
|
||
|
||
errno = 0;
|
||
de = readdir(d);
|
||
if (!de && errno != 0)
|
||
return -errno;
|
||
|
||
if (!de)
|
||
break;
|
||
|
||
if (hidden_file(de->d_name))
|
||
continue;
|
||
|
||
device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY);
|
||
if (device < 0) {
|
||
if (errno == ENOENT || errno == ENOTDIR)
|
||
continue;
|
||
|
||
return -errno;
|
||
}
|
||
|
||
fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY);
|
||
if (fd < 0) {
|
||
if (errno == ENOENT)
|
||
continue;
|
||
|
||
return -errno;
|
||
}
|
||
|
||
n = read(fd, contents, sizeof(contents));
|
||
if (n < 0)
|
||
return -errno;
|
||
|
||
if (n != 6 || memcmp(contents, "Mains\n", 6))
|
||
continue;
|
||
|
||
safe_close(fd);
|
||
fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY);
|
||
if (fd < 0) {
|
||
if (errno == ENOENT)
|
||
continue;
|
||
|
||
return -errno;
|
||
}
|
||
|
||
n = read(fd, contents, sizeof(contents));
|
||
if (n < 0)
|
||
return -errno;
|
||
|
||
if (n != 2 || contents[1] != '\n')
|
||
return -EIO;
|
||
|
||
if (contents[0] == '1') {
|
||
found_online = true;
|
||
break;
|
||
} else if (contents[0] == '0')
|
||
found_offline = true;
|
||
else
|
||
return -EIO;
|
||
}
|
||
|
||
return found_online || !found_offline;
|
||
}
|
||
|
||
void* greedy_realloc(void **p, size_t *allocated, size_t need, size_t size) {
|
||
size_t a, newalloc;
|
||
void *q;
|
||
|
||
assert(p);
|
||
assert(allocated);
|
||
|
||
if (*allocated >= need)
|
||
return *p;
|
||
|
||
newalloc = MAX(need * 2, 64u / size);
|
||
a = newalloc * size;
|
||
|
||
/* check for overflows */
|
||
if (a < size * need)
|
||
return NULL;
|
||
|
||
q = realloc(*p, a);
|
||
if (!q)
|
||
return NULL;
|
||
|
||
*p = q;
|
||
*allocated = newalloc;
|
||
return q;
|
||
}
|
||
|
||
void* greedy_realloc0(void **p, size_t *allocated, size_t need, size_t size) {
|
||
size_t prev;
|
||
uint8_t *q;
|
||
|
||
assert(p);
|
||
assert(allocated);
|
||
|
||
prev = *allocated;
|
||
|
||
q = greedy_realloc(p, allocated, need, size);
|
||
if (!q)
|
||
return NULL;
|
||
|
||
if (*allocated > prev)
|
||
memzero(q + prev * size, (*allocated - prev) * size);
|
||
|
||
return q;
|
||
}
|
||
|
||
bool id128_is_valid(const char *s) {
|
||
size_t i, l;
|
||
|
||
l = strlen(s);
|
||
if (l == 32) {
|
||
|
||
/* Simple formatted 128bit hex string */
|
||
|
||
for (i = 0; i < l; i++) {
|
||
char c = s[i];
|
||
|
||
if (!(c >= '0' && c <= '9') &&
|
||
!(c >= 'a' && c <= 'z') &&
|
||
!(c >= 'A' && c <= 'Z'))
|
||
return false;
|
||
}
|
||
|
||
} else if (l == 36) {
|
||
|
||
/* Formatted UUID */
|
||
|
||
for (i = 0; i < l; i++) {
|
||
char c = s[i];
|
||
|
||
if ((i == 8 || i == 13 || i == 18 || i == 23)) {
|
||
if (c != '-')
|
||
return false;
|
||
} else {
|
||
if (!(c >= '0' && c <= '9') &&
|
||
!(c >= 'a' && c <= 'z') &&
|
||
!(c >= 'A' && c <= 'Z'))
|
||
return false;
|
||
}
|
||
}
|
||
|
||
} else
|
||
return false;
|
||
|
||
return true;
|
||
}
|
||
|
||
int shall_restore_state(void) {
|
||
_cleanup_free_ char *value = NULL;
|
||
int r;
|
||
|
||
r = get_proc_cmdline_key("systemd.restore_state=", &value);
|
||
if (r < 0)
|
||
return r;
|
||
if (r == 0)
|
||
return true;
|
||
|
||
return parse_boolean(value) != 0;
|
||
}
|
||
|
||
int proc_cmdline(char **ret) {
|
||
assert(ret);
|
||
|
||
if (detect_container() > 0)
|
||
return get_process_cmdline(1, 0, false, ret);
|
||
else
|
||
return read_one_line_file("/proc/cmdline", ret);
|
||
}
|
||
|
||
int parse_proc_cmdline(int (*parse_item)(const char *key, const char *value)) {
|
||
_cleanup_free_ char *line = NULL;
|
||
const char *p;
|
||
int r;
|
||
|
||
assert(parse_item);
|
||
|
||
r = proc_cmdline(&line);
|
||
if (r < 0)
|
||
return r;
|
||
|
||
p = line;
|
||
for (;;) {
|
||
_cleanup_free_ char *word = NULL;
|
||
char *value = NULL;
|
||
|
||
r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES|EXTRACT_RELAX);
|
||
if (r < 0)
|
||
return r;
|
||
if (r == 0)
|
||
break;
|
||
|
||
/* Filter out arguments that are intended only for the
|
||
* initrd */
|
||
if (!in_initrd() && startswith(word, "rd."))
|
||
continue;
|
||
|
||
value = strchr(word, '=');
|
||
if (value)
|
||
*(value++) = 0;
|
||
|
||
r = parse_item(word, value);
|
||
if (r < 0)
|
||
return r;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
int get_proc_cmdline_key(const char *key, char **value) {
|
||
_cleanup_free_ char *line = NULL, *ret = NULL;
|
||
bool found = false;
|
||
const char *p;
|
||
int r;
|
||
|
||
assert(key);
|
||
|
||
r = proc_cmdline(&line);
|
||
if (r < 0)
|
||
return r;
|
||
|
||
p = line;
|
||
for (;;) {
|
||
_cleanup_free_ char *word = NULL;
|
||
const char *e;
|
||
|
||
r = extract_first_word(&p, &word, NULL, EXTRACT_QUOTES|EXTRACT_RELAX);
|
||
if (r < 0)
|
||
return r;
|
||
if (r == 0)
|
||
break;
|
||
|
||
/* Filter out arguments that are intended only for the
|
||
* initrd */
|
||
if (!in_initrd() && startswith(word, "rd."))
|
||
continue;
|
||
|
||
if (value) {
|
||
e = startswith(word, key);
|
||
if (!e)
|
||
continue;
|
||
|
||
r = free_and_strdup(&ret, e);
|
||
if (r < 0)
|
||
return r;
|
||
|
||
found = true;
|
||
} else {
|
||
if (streq(word, key))
|
||
found = true;
|
||
}
|
||
}
|
||
|
||
if (value) {
|
||
*value = ret;
|
||
ret = NULL;
|
||
}
|
||
|
||
return found;
|
||
|
||
}
|
||
|
||
int container_get_leader(const char *machine, pid_t *pid) {
|
||
_cleanup_free_ char *s = NULL, *class = NULL;
|
||
const char *p;
|
||
pid_t leader;
|
||
int r;
|
||
|
||
assert(machine);
|
||
assert(pid);
|
||
|
||
if (!machine_name_is_valid(machine))
|
||
return -EINVAL;
|
||
|
||
p = strjoina("/run/systemd/machines/", machine);
|
||
r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL);
|
||
if (r == -ENOENT)
|
||
return -EHOSTDOWN;
|
||
if (r < 0)
|
||
return r;
|
||
if (!s)
|
||
return -EIO;
|
||
|
||
if (!streq_ptr(class, "container"))
|
||
return -EIO;
|
||
|
||
r = parse_pid(s, &leader);
|
||
if (r < 0)
|
||
return r;
|
||
if (leader <= 1)
|
||
return -EIO;
|
||
|
||
*pid = leader;
|
||
return 0;
|
||
}
|
||
|
||
int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *userns_fd, int *root_fd) {
|
||
_cleanup_close_ int pidnsfd = -1, mntnsfd = -1, netnsfd = -1, usernsfd = -1;
|
||
int rfd = -1;
|
||
|
||
assert(pid >= 0);
|
||
|
||
if (mntns_fd) {
|
||
const char *mntns;
|
||
|
||
mntns = procfs_file_alloca(pid, "ns/mnt");
|
||
mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
|
||
if (mntnsfd < 0)
|
||
return -errno;
|
||
}
|
||
|
||
if (pidns_fd) {
|
||
const char *pidns;
|
||
|
||
pidns = procfs_file_alloca(pid, "ns/pid");
|
||
pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
|
||
if (pidnsfd < 0)
|
||
return -errno;
|
||
}
|
||
|
||
if (netns_fd) {
|
||
const char *netns;
|
||
|
||
netns = procfs_file_alloca(pid, "ns/net");
|
||
netnsfd = open(netns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
|
||
if (netnsfd < 0)
|
||
return -errno;
|
||
}
|
||
|
||
if (userns_fd) {
|
||
const char *userns;
|
||
|
||
userns = procfs_file_alloca(pid, "ns/user");
|
||
usernsfd = open(userns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
|
||
if (usernsfd < 0 && errno != ENOENT)
|
||
return -errno;
|
||
}
|
||
|
||
if (root_fd) {
|
||
const char *root;
|
||
|
||
root = procfs_file_alloca(pid, "root");
|
||
rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY);
|
||
if (rfd < 0)
|
||
return -errno;
|
||
}
|
||
|
||
if (pidns_fd)
|
||
*pidns_fd = pidnsfd;
|
||
|
||
if (mntns_fd)
|
||
*mntns_fd = mntnsfd;
|
||
|
||
if (netns_fd)
|
||
*netns_fd = netnsfd;
|
||
|
||
if (userns_fd)
|
||
*userns_fd = usernsfd;
|
||
|
||
if (root_fd)
|
||
*root_fd = rfd;
|
||
|
||
pidnsfd = mntnsfd = netnsfd = usernsfd = -1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int userns_fd, int root_fd) {
|
||
if (userns_fd >= 0) {
|
||
/* Can't setns to your own userns, since then you could
|
||
* escalate from non-root to root in your own namespace, so
|
||
* check if namespaces equal before attempting to enter. */
|
||
_cleanup_free_ char *userns_fd_path = NULL;
|
||
int r;
|
||
if (asprintf(&userns_fd_path, "/proc/self/fd/%d", userns_fd) < 0)
|
||
return -ENOMEM;
|
||
|
||
r = files_same(userns_fd_path, "/proc/self/ns/user");
|
||
if (r < 0)
|
||
return r;
|
||
if (r)
|
||
userns_fd = -1;
|
||
}
|
||
|
||
if (pidns_fd >= 0)
|
||
if (setns(pidns_fd, CLONE_NEWPID) < 0)
|
||
return -errno;
|
||
|
||
if (mntns_fd >= 0)
|
||
if (setns(mntns_fd, CLONE_NEWNS) < 0)
|
||
return -errno;
|
||
|
||
if (netns_fd >= 0)
|
||
if (setns(netns_fd, CLONE_NEWNET) < 0)
|
||
return -errno;
|
||
|
||
if (userns_fd >= 0)
|
||
if (setns(userns_fd, CLONE_NEWUSER) < 0)
|
||
return -errno;
|
||
|
||
if (root_fd >= 0) {
|
||
if (fchdir(root_fd) < 0)
|
||
return -errno;
|
||
|
||
if (chroot(".") < 0)
|
||
return -errno;
|
||
}
|
||
|
||
return reset_uid_gid();
|
||
}
|
||
|
||
unsigned long personality_from_string(const char *p) {
|
||
|
||
/* Parse a personality specifier. We introduce our own
|
||
* identifiers that indicate specific ABIs, rather than just
|
||
* hints regarding the register size, since we want to keep
|
||
* things open for multiple locally supported ABIs for the
|
||
* same register size. We try to reuse the ABI identifiers
|
||
* used by libseccomp. */
|
||
|
||
#if defined(__x86_64__)
|
||
|
||
if (streq(p, "x86"))
|
||
return PER_LINUX32;
|
||
|
||
if (streq(p, "x86-64"))
|
||
return PER_LINUX;
|
||
|
||
#elif defined(__i386__)
|
||
|
||
if (streq(p, "x86"))
|
||
return PER_LINUX;
|
||
|
||
#elif defined(__s390x__)
|
||
|
||
if (streq(p, "s390"))
|
||
return PER_LINUX32;
|
||
|
||
if (streq(p, "s390x"))
|
||
return PER_LINUX;
|
||
|
||
#elif defined(__s390__)
|
||
|
||
if (streq(p, "s390"))
|
||
return PER_LINUX;
|
||
#endif
|
||
|
||
return PERSONALITY_INVALID;
|
||
}
|
||
|
||
const char* personality_to_string(unsigned long p) {
|
||
|
||
#if defined(__x86_64__)
|
||
|
||
if (p == PER_LINUX32)
|
||
return "x86";
|
||
|
||
if (p == PER_LINUX)
|
||
return "x86-64";
|
||
|
||
#elif defined(__i386__)
|
||
|
||
if (p == PER_LINUX)
|
||
return "x86";
|
||
|
||
#elif defined(__s390x__)
|
||
|
||
if (p == PER_LINUX)
|
||
return "s390x";
|
||
|
||
if (p == PER_LINUX32)
|
||
return "s390";
|
||
|
||
#elif defined(__s390__)
|
||
|
||
if (p == PER_LINUX)
|
||
return "s390";
|
||
|
||
#endif
|
||
|
||
return NULL;
|
||
}
|
||
|
||
uint64_t physical_memory(void) {
|
||
long mem;
|
||
|
||
/* We return this as uint64_t in case we are running as 32bit
|
||
* process on a 64bit kernel with huge amounts of memory */
|
||
|
||
mem = sysconf(_SC_PHYS_PAGES);
|
||
assert(mem > 0);
|
||
|
||
return (uint64_t) mem * (uint64_t) page_size();
|
||
}
|
||
|
||
int update_reboot_param_file(const char *param) {
|
||
int r = 0;
|
||
|
||
if (param) {
|
||
r = write_string_file(REBOOT_PARAM_FILE, param, WRITE_STRING_FILE_CREATE);
|
||
if (r < 0)
|
||
return log_error_errno(r, "Failed to write reboot param to "REBOOT_PARAM_FILE": %m");
|
||
} else
|
||
(void) unlink(REBOOT_PARAM_FILE);
|
||
|
||
return 0;
|
||
}
|
||
|
||
int is_symlink(const char *path) {
|
||
struct stat info;
|
||
|
||
if (lstat(path, &info) < 0)
|
||
return -errno;
|
||
|
||
return !!S_ISLNK(info.st_mode);
|
||
}
|
||
|
||
int is_dir(const char* path, bool follow) {
|
||
struct stat st;
|
||
int r;
|
||
|
||
if (follow)
|
||
r = stat(path, &st);
|
||
else
|
||
r = lstat(path, &st);
|
||
if (r < 0)
|
||
return -errno;
|
||
|
||
return !!S_ISDIR(st.st_mode);
|
||
}
|
||
|
||
int is_device_node(const char *path) {
|
||
struct stat info;
|
||
|
||
if (lstat(path, &info) < 0)
|
||
return -errno;
|
||
|
||
return !!(S_ISBLK(info.st_mode) || S_ISCHR(info.st_mode));
|
||
}
|
||
|
||
int syslog_parse_priority(const char **p, int *priority, bool with_facility) {
|
||
int a = 0, b = 0, c = 0;
|
||
int k;
|
||
|
||
assert(p);
|
||
assert(*p);
|
||
assert(priority);
|
||
|
||
if ((*p)[0] != '<')
|
||
return 0;
|
||
|
||
if (!strchr(*p, '>'))
|
||
return 0;
|
||
|
||
if ((*p)[2] == '>') {
|
||
c = undecchar((*p)[1]);
|
||
k = 3;
|
||
} else if ((*p)[3] == '>') {
|
||
b = undecchar((*p)[1]);
|
||
c = undecchar((*p)[2]);
|
||
k = 4;
|
||
} else if ((*p)[4] == '>') {
|
||
a = undecchar((*p)[1]);
|
||
b = undecchar((*p)[2]);
|
||
c = undecchar((*p)[3]);
|
||
k = 5;
|
||
} else
|
||
return 0;
|
||
|
||
if (a < 0 || b < 0 || c < 0 ||
|
||
(!with_facility && (a || b || c > 7)))
|
||
return 0;
|
||
|
||
if (with_facility)
|
||
*priority = a*100 + b*10 + c;
|
||
else
|
||
*priority = (*priority & LOG_FACMASK) | c;
|
||
|
||
*p += k;
|
||
return 1;
|
||
}
|
||
|
||
ssize_t string_table_lookup(const char * const *table, size_t len, const char *key) {
|
||
size_t i;
|
||
|
||
if (!key)
|
||
return -1;
|
||
|
||
for (i = 0; i < len; ++i)
|
||
if (streq_ptr(table[i], key))
|
||
return (ssize_t) i;
|
||
|
||
return -1;
|
||
}
|
||
|
||
int version(void) {
|
||
puts(PACKAGE_STRING "\n"
|
||
SYSTEMD_FEATURES);
|
||
return 0;
|
||
}
|
||
|
||
bool fdname_is_valid(const char *s) {
|
||
const char *p;
|
||
|
||
/* Validates a name for $LISTEN_FDNAMES. We basically allow
|
||
* everything ASCII that's not a control character. Also, as
|
||
* special exception the ":" character is not allowed, as we
|
||
* use that as field separator in $LISTEN_FDNAMES.
|
||
*
|
||
* Note that the empty string is explicitly allowed
|
||
* here. However, we limit the length of the names to 255
|
||
* characters. */
|
||
|
||
if (!s)
|
||
return false;
|
||
|
||
for (p = s; *p; p++) {
|
||
if (*p < ' ')
|
||
return false;
|
||
if (*p >= 127)
|
||
return false;
|
||
if (*p == ':')
|
||
return false;
|
||
}
|
||
|
||
return p - s < 256;
|
||
}
|
||
|
||
bool oom_score_adjust_is_valid(int oa) {
|
||
return oa >= OOM_SCORE_ADJ_MIN && oa <= OOM_SCORE_ADJ_MAX;
|
||
}
|