308 lines
8.7 KiB
C
308 lines
8.7 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 General Public License as published by
|
|
the Free Software Foundation; either version 2 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
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
|
***/
|
|
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <sys/stat.h>
|
|
#include <limits.h>
|
|
#include <dirent.h>
|
|
#include <grp.h>
|
|
#include <pwd.h>
|
|
|
|
#include "log.h"
|
|
#include "util.h"
|
|
#include "strv.h"
|
|
#include "label.h"
|
|
|
|
/* This reads all files listed in /etc/tempfiles.d/?*.conf and creates
|
|
* them in the file system. This is intended to be used to create
|
|
* properly owned directories beneath /tmp, /var/tmp, /var/run and
|
|
* /var/lock which are volatile and hence need to be recreated on
|
|
* bootup. */
|
|
|
|
static void process_line(const char *fname, unsigned line, const char *buffer, const char *prefix) {
|
|
char type;
|
|
char *path = NULL;
|
|
unsigned mode;
|
|
char *user = NULL, *group = NULL;
|
|
uid_t uid;
|
|
gid_t gid;
|
|
bool uid_set = false, gid_set = false;
|
|
int n, fd = -1;
|
|
|
|
assert(fname);
|
|
assert(line >= 1);
|
|
assert(buffer);
|
|
|
|
if ((n = sscanf(buffer,
|
|
"%c "
|
|
"%ms "
|
|
"%o "
|
|
"%ms "
|
|
"%ms ",
|
|
&type,
|
|
&path,
|
|
&mode,
|
|
&user,
|
|
&group)) < 2) {
|
|
log_error("[%s:%u] Syntax error.", fname, line);
|
|
goto finish;
|
|
}
|
|
|
|
if (type != 'f' && type != 'd') {
|
|
log_error("[%s:%u] Unknown file type '%c'.", fname, line, type);
|
|
goto finish;
|
|
}
|
|
|
|
if (prefix && !path_startswith(path, prefix))
|
|
goto finish;
|
|
|
|
if (user && !streq(user, "-")) {
|
|
unsigned long lu;
|
|
struct passwd *p;
|
|
|
|
if (streq(user, "root") || streq(user, "0"))
|
|
uid = 0;
|
|
else if (safe_atolu(user, &lu) >= 0)
|
|
uid = (uid_t) lu;
|
|
else if ((p = getpwnam(user)))
|
|
uid = p->pw_uid;
|
|
else {
|
|
log_error("[%s:%u] Unknown user '%s'.", fname, line, user);
|
|
goto finish;
|
|
}
|
|
|
|
uid_set = true;
|
|
}
|
|
|
|
if (group && !streq(group, "-")) {
|
|
unsigned long lu;
|
|
struct group *g;
|
|
|
|
if (streq(group, "root") || streq(group, "0"))
|
|
gid = 0;
|
|
else if (safe_atolu(group, &lu) >= 0)
|
|
gid = (gid_t) lu;
|
|
else if ((g = getgrnam(group)))
|
|
gid = g->gr_gid;
|
|
else {
|
|
log_error("[%s:%u] Unknown group '%s'.", fname, line, group);
|
|
goto finish;
|
|
}
|
|
|
|
gid_set = true;
|
|
}
|
|
|
|
if (n < 3)
|
|
mode = type == 'f' ? 0644 : 0755;
|
|
|
|
if (type == 'f') {
|
|
mode_t u;
|
|
struct stat st;
|
|
|
|
u = umask(0);
|
|
fd = open(path, O_CREAT|O_NDELAY|O_CLOEXEC|O_WRONLY|O_NOCTTY|O_NOFOLLOW, mode);
|
|
umask(u);
|
|
|
|
if (fd < 0) {
|
|
log_error("Failed to create file %s: %m", path);
|
|
goto finish;
|
|
}
|
|
|
|
if (fstat(fd, &st) < 0) {
|
|
log_error("stat(%s) failed: %m", path);
|
|
goto finish;
|
|
}
|
|
|
|
if (!S_ISREG(st.st_mode)) {
|
|
log_error("%s is not a file.", path);
|
|
goto finish;
|
|
}
|
|
|
|
if (fchmod(fd, mode) < 0) {
|
|
log_error("chmod(%s) failed: %m", path);
|
|
goto finish;
|
|
}
|
|
|
|
if (uid_set || gid_set) {
|
|
|
|
if (fchown(fd,
|
|
uid_set ? uid : (uid_t) -1,
|
|
gid_set ? gid : (gid_t) -1) < 0) {
|
|
log_error("chown(%s) failed: %m", path);
|
|
goto finish;
|
|
}
|
|
}
|
|
|
|
} else if (type == 'd') {
|
|
mode_t u;
|
|
int r;
|
|
struct stat st;
|
|
|
|
u = umask(0);
|
|
r = mkdir(path, mode);
|
|
umask(u);
|
|
|
|
if (r < 0 && errno != EEXIST) {
|
|
log_error("Failed to create directory %s: %m", path);
|
|
goto finish;
|
|
}
|
|
|
|
if (stat(path, &st) < 0) {
|
|
log_error("stat(%s) failed: %m", path);
|
|
goto finish;
|
|
}
|
|
|
|
if (!S_ISDIR(st.st_mode)) {
|
|
log_error("%s is not a directory.", path);
|
|
goto finish;
|
|
}
|
|
|
|
if (chmod(path, mode) < 0) {
|
|
log_error("chmod(%s) failed: %m", path);
|
|
goto finish;
|
|
}
|
|
|
|
if (uid_set || gid_set) {
|
|
|
|
if (chown(path,
|
|
uid_set ? uid : (uid_t) -1,
|
|
gid_set ? gid : (gid_t) -1) < 0) {
|
|
log_error("chown(%s) failed: %m", path);
|
|
goto finish;
|
|
}
|
|
}
|
|
}
|
|
|
|
label_fix(path);
|
|
|
|
log_debug("%s created successfully.", path);
|
|
|
|
finish:
|
|
free(path);
|
|
free(user);
|
|
free(group);
|
|
|
|
if (fd >= 0)
|
|
close_nointr_nofail(fd);
|
|
}
|
|
|
|
static int scandir_filter(const struct dirent *d) {
|
|
assert(d);
|
|
|
|
if (ignore_file(d->d_name))
|
|
return 0;
|
|
|
|
if (d->d_type != DT_REG &&
|
|
d->d_type != DT_LNK)
|
|
return 0;
|
|
|
|
return endswith(d->d_name, ".conf");
|
|
}
|
|
|
|
int main(int argc, char *argv[]) {
|
|
struct dirent **de = NULL;
|
|
int r = EXIT_FAILURE, n, i;
|
|
const char *prefix = NULL;
|
|
|
|
if (argc > 2) {
|
|
log_error("This program takes no more than one argument.");
|
|
return EXIT_FAILURE;
|
|
} else if (argc > 1)
|
|
prefix = argv[1];
|
|
else
|
|
prefix = "/";
|
|
|
|
log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
|
|
log_parse_environment();
|
|
log_open();
|
|
|
|
label_init();
|
|
|
|
if ((n = scandir("/etc/tempfiles.d/", &de, scandir_filter, alphasort)) < 0) {
|
|
|
|
if (errno == ENOENT)
|
|
r = EXIT_SUCCESS;
|
|
else
|
|
log_error("Failed to enumerate /etc/tempfiles.d/ files: %m");
|
|
|
|
goto finish;
|
|
}
|
|
|
|
r = EXIT_SUCCESS;
|
|
|
|
for (i = 0; i < n; i++) {
|
|
int k;
|
|
char *fn;
|
|
FILE *f;
|
|
unsigned j;
|
|
|
|
k = asprintf(&fn, "/etc/tempfiles.d/%s", de[i]->d_name);
|
|
free(de[i]);
|
|
|
|
if (k < 0) {
|
|
log_error("Failed to allocate file name.");
|
|
r = EXIT_FAILURE;
|
|
continue;
|
|
}
|
|
|
|
f = fopen(fn, "re");
|
|
free(fn);
|
|
|
|
if (!f) {
|
|
log_error("Failed to open %s: %m", fn);
|
|
r = EXIT_FAILURE;
|
|
continue;
|
|
}
|
|
|
|
j = 0;
|
|
for (;;) {
|
|
char line[LINE_MAX], *l;
|
|
|
|
if (!(fgets(line, sizeof(line), f)))
|
|
break;
|
|
|
|
j++;
|
|
|
|
l = strstrip(line);
|
|
if (*l == '#' || *l == 0)
|
|
continue;
|
|
|
|
process_line(de[i]->d_name, j, l, prefix);
|
|
}
|
|
|
|
if (ferror(f)) {
|
|
r = EXIT_FAILURE;
|
|
log_error("Failed to read from file: %m");
|
|
}
|
|
|
|
fclose(f);
|
|
}
|
|
|
|
free(de);
|
|
|
|
finish:
|
|
|
|
return r;
|
|
}
|