along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
-#include <assert.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
#include <signal.h>
+#include <libintl.h>
+#include <locale.h>
#include <stdio.h>
#include <syslog.h>
#include <sched.h>
#include <linux/tiocl.h>
#include <termios.h>
#include <stdarg.h>
-#include <sys/poll.h>
+#include <poll.h>
#include <ctype.h>
#include <sys/prctl.h>
#include <sys/utsname.h>
#include <pwd.h>
#include <netinet/ip.h>
#include <linux/kd.h>
-#include <dlfcn.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <glob.h>
#include <locale.h>
#include <sys/personality.h>
#include <sys/xattr.h>
-#include <libgen.h>
#include <sys/statvfs.h>
+#include <sys/file.h>
#include <linux/fs.h>
+
+/* When we include libgen.h because we need dirname() we immediately
+ * undefine basename() since libgen.h defines it as a macro to the XDG
+ * version which is really broken. */
+#include <libgen.h>
#undef basename
#ifdef HAVE_SYS_AUXV_H
#include <sys/auxv.h>
#endif
+#include "config.h"
#include "macro.h"
#include "util.h"
#include "ioprio.h"
#include "missing.h"
#include "log.h"
#include "strv.h"
-#include "label.h"
#include "mkdir.h"
#include "path-util.h"
#include "exit-status.h"
#include "def.h"
#include "sparse-endian.h"
+/* Put this test here for a lack of better place */
+assert_cc(EAGAIN == EWOULDBLOCK);
+
int saved_argc = 0;
char **saved_argv = NULL;
return (char*) s + sl - pl;
}
+char* endswith_no_case(const char *s, const char *postfix) {
+ size_t sl, pl;
+
+ assert(s);
+ assert(postfix);
+
+ sl = strlen(s);
+ pl = strlen(postfix);
+
+ if (pl == 0)
+ return (char*) s + sl;
+
+ if (sl < pl)
+ return NULL;
+
+ if (strcasecmp(s + sl - pl, postfix) != 0)
+ return NULL;
+
+ return (char*) s + sl - pl;
+}
+
char* first_word(const char *s, const char *word) {
size_t sl, wl;
const char *p;
int safe_atod(const char *s, double *ret_d) {
char *x = NULL;
double d = 0;
+ locale_t loc;
assert(s);
assert(ret_d);
- RUN_WITH_LOCALE(LC_NUMERIC_MASK, "C") {
- errno = 0;
- d = strtod(s, &x);
- }
+ loc = newlocale(LC_NUMERIC_MASK, "C", (locale_t) 0);
+ if (loc == (locale_t) 0)
+ return -errno;
- if (!x || x == s || *x || errno)
+ errno = 0;
+ d = strtod_l(s, &x, loc);
+
+ if (!x || x == s || *x || errno) {
+ freelocale(loc);
return errno ? -errno : -EINVAL;
+ }
+ freelocale(loc);
*ret_d = (double) d;
return 0;
}
return r;
}
-char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) {
+static int cunescape_one(const char *p, size_t length, char *ret) {
+ int r = 1;
+
+ assert(p);
+ assert(*p);
+ assert(ret);
+
+ if (length != (size_t) -1 && length < 1)
+ return -EINVAL;
+
+ switch (p[0]) {
+
+ case 'a':
+ *ret = '\a';
+ break;
+ case 'b':
+ *ret = '\b';
+ break;
+ case 'f':
+ *ret = '\f';
+ break;
+ case 'n':
+ *ret = '\n';
+ break;
+ case 'r':
+ *ret = '\r';
+ break;
+ case 't':
+ *ret = '\t';
+ break;
+ case 'v':
+ *ret = '\v';
+ break;
+ case '\\':
+ *ret = '\\';
+ break;
+ case '"':
+ *ret = '"';
+ break;
+ case '\'':
+ *ret = '\'';
+ break;
+
+ case 's':
+ /* This is an extension of the XDG syntax files */
+ *ret = ' ';
+ break;
+
+ case 'x': {
+ /* hexadecimal encoding */
+ int a, b;
+
+ if (length != (size_t) -1 && length < 3)
+ return -EINVAL;
+
+ a = unhexchar(p[1]);
+ if (a < 0)
+ return -EINVAL;
+
+ b = unhexchar(p[2]);
+ if (b < 0)
+ return -EINVAL;
+
+ /* don't allow NUL bytes */
+ if (a == 0 && b == 0)
+ return -EINVAL;
+
+ *ret = (char) ((a << 4) | b);
+ r = 3;
+ break;
+ }
+
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7': {
+ /* octal encoding */
+ int a, b, c, m;
+
+ if (length != (size_t) -1 && length < 4)
+ return -EINVAL;
+
+ a = unoctchar(p[0]);
+ if (a < 0)
+ return -EINVAL;
+
+ b = unoctchar(p[1]);
+ if (b < 0)
+ return -EINVAL;
+
+ c = unoctchar(p[2]);
+ if (c < 0)
+ return -EINVAL;
+
+ /* don't allow NUL bytes */
+ if (a == 0 && b == 0 && c == 0)
+ return -EINVAL;
+
+ /* Don't allow bytes above 255 */
+ m = (a << 6) | (b << 3) | c;
+ if (m > 255)
+ return -EINVAL;
+
+ *ret = (char) m;
+ r = 3;
+ break;
+ }
+
+ default:
+ return -EINVAL;
+ }
+
+ return r;
+}
+
+int cunescape_length_with_prefix(const char *s, size_t length, const char *prefix, UnescapeFlags flags, char **ret) {
char *r, *t;
const char *f;
size_t pl;
assert(s);
+ assert(ret);
/* Undoes C style string escaping, and optionally prefixes it. */
r = new(char, pl+length+1);
if (!r)
- return NULL;
+ return -ENOMEM;
if (prefix)
memcpy(r, prefix, pl);
for (f = s, t = r + pl; f < s + length; f++) {
+ size_t remaining;
+ int k;
+
+ remaining = s + length - f;
+ assert(remaining > 0);
if (*f != '\\') {
+ /* A literal literal, copy verbatim */
*(t++) = *f;
continue;
}
- f++;
-
- switch (*f) {
-
- case 'a':
- *(t++) = '\a';
- break;
- case 'b':
- *(t++) = '\b';
- break;
- case 'f':
- *(t++) = '\f';
- break;
- case 'n':
- *(t++) = '\n';
- break;
- case 'r':
- *(t++) = '\r';
- break;
- case 't':
- *(t++) = '\t';
- break;
- case 'v':
- *(t++) = '\v';
- break;
- case '\\':
- *(t++) = '\\';
- break;
- case '"':
- *(t++) = '"';
- break;
- case '\'':
- *(t++) = '\'';
- break;
-
- case 's':
- /* This is an extension of the XDG syntax files */
- *(t++) = ' ';
- break;
-
- case 'x': {
- /* hexadecimal encoding */
- int a, b;
-
- a = unhexchar(f[1]);
- b = unhexchar(f[2]);
-
- if (a < 0 || b < 0 || (a == 0 && b == 0)) {
- /* Invalid escape code, let's take it literal then */
- *(t++) = '\\';
- *(t++) = 'x';
- } else {
- *(t++) = (char) ((a << 4) | b);
- f += 2;
+ if (remaining == 1) {
+ if (flags & UNESCAPE_RELAX) {
+ /* A trailing backslash, copy verbatim */
+ *(t++) = *f;
+ continue;
}
- break;
+ return -EINVAL;
}
- case '0':
- case '1':
- case '2':
- case '3':
- case '4':
- case '5':
- case '6':
- case '7': {
- /* octal encoding */
- int a, b, c;
-
- a = unoctchar(f[0]);
- b = unoctchar(f[1]);
- c = unoctchar(f[2]);
-
- if (a < 0 || b < 0 || c < 0 || (a == 0 && b == 0 && c == 0)) {
+ k = cunescape_one(f + 1, remaining - 1, t);
+ if (k < 0) {
+ if (flags & UNESCAPE_RELAX) {
/* Invalid escape code, let's take it literal then */
*(t++) = '\\';
- *(t++) = f[0];
- } else {
- *(t++) = (char) ((a << 6) | (b << 3) | c);
- f += 2;
+ continue;
}
- break;
+ return k;
}
- case 0:
- /* premature end of string. */
- *(t++) = '\\';
- goto finish;
-
- default:
- /* Invalid escape code, let's take it literal then */
- *(t++) = '\\';
- *(t++) = *f;
- break;
- }
+ f += k;
+ t++;
}
-finish:
*t = 0;
- return r;
-}
-char *cunescape_length(const char *s, size_t length) {
- return cunescape_length_with_prefix(s, length, NULL);
+ *ret = r;
+ return t - r;
}
-char *cunescape(const char *s) {
- assert(s);
+int cunescape_length(const char *s, size_t length, UnescapeFlags flags, char **ret) {
+ return cunescape_length_with_prefix(s, length, NULL, flags, ret);
+}
- return cunescape_length(s, strlen(s));
+int cunescape(const char *s, UnescapeFlags flags, char **ret) {
+ return cunescape_length(s, strlen(s), flags, ret);
}
char *xescape(const char *s, const char *bad) {
endswith(filename, ".dpkg-old") ||
endswith(filename, ".dpkg-new") ||
endswith(filename, ".dpkg-tmp") ||
+ endswith(filename, ".dpkg-dist") ||
+ endswith(filename, ".dpkg-bak") ||
+ endswith(filename, ".dpkg-backup") ||
+ endswith(filename, ".dpkg-remove") ||
endswith(filename, ".swp");
}
bool fstype_is_network(const char *fstype) {
static const char table[] =
+ "afs\0"
"cifs\0"
"smbfs\0"
"sshfs\0"
return n;
}
+int loop_read_exact(int fd, void *buf, size_t nbytes, bool do_poll) {
+ ssize_t n;
+
+ n = loop_read(fd, buf, nbytes, do_poll);
+ if (n < 0)
+ return n;
+ if ((size_t) n != nbytes)
+ return -EIO;
+ return 0;
+}
+
int loop_write(int fd, const void *buf, size_t nbytes, bool do_poll) {
const uint8_t *p = buf;
int dev_urandom(void *p, size_t n) {
static int have_syscall = -1;
- int r, fd;
- ssize_t k;
+
+ _cleanup_close_ int fd = -1;
+ int r;
/* Gathers some randomness from the kernel. This call will
* never block, and will always return some data from the
return -errno;
} else
/* too short read? */
- return -EIO;
+ return -ENODATA;
}
fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY);
if (fd < 0)
return errno == ENOENT ? -ENOSYS : -errno;
- k = loop_read(fd, p, n, true);
- safe_close(fd);
-
- if (k < 0)
- return (int) k;
- if ((size_t) k != n)
- return -EIO;
-
- return 0;
+ return loop_read_exact(fd, p, n, true);
}
void initialize_srand(void) {
int getttyname_harder(int fd, char **r) {
int k;
- char *s;
+ char *s = NULL;
k = getttyname_malloc(fd, &s);
if (k < 0)
/* This is an ugly hack */
if (major(devnr) == 136) {
- asprintf(&b, "pts/%u", minor(devnr));
- goto finish;
- }
+ if (asprintf(&b, "pts/%u", minor(devnr)) < 0)
+ return -ENOMEM;
+ } else {
+ /* Probably something like the ptys which have no
+ * symlink in /dev/char. Let's return something
+ * vaguely useful. */
- /* Probably something like the ptys which have no
- * symlink in /dev/char. Let's return something
- * vaguely useful. */
+ b = strdup(fn + 5);
+ if (!b)
+ return -ENOMEM;
+ }
+ } else {
+ if (startswith(s, "/dev/"))
+ p = s + 5;
+ else if (startswith(s, "../"))
+ p = s + 3;
+ else
+ p = s;
- b = strdup(fn + 5);
- goto finish;
+ b = strdup(p);
+ if (!b)
+ return -ENOMEM;
}
- if (startswith(s, "/dev/"))
- p = s + 5;
- else if (startswith(s, "../"))
- p = s + 3;
- else
- p = s;
-
- b = strdup(p);
-
-finish:
- if (!b)
- return -ENOMEM;
-
*r = b;
if (_devnr)
*_devnr = devnr;
return 0;
}
-int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) {
- _cleanup_closedir_ DIR *d = NULL;
- int ret = 0;
-
- assert(fd >= 0);
-
- /* This returns the first error we run into, but nevertheless
- * tries to go on. This closes the passed fd. */
-
- d = fdopendir(fd);
- if (!d) {
- safe_close(fd);
-
- return errno == ENOENT ? 0 : -errno;
- }
-
- for (;;) {
- struct dirent *de;
- bool is_dir, keep_around;
- struct stat st;
- int r;
-
- errno = 0;
- de = readdir(d);
- if (!de) {
- if (errno != 0 && ret == 0)
- ret = -errno;
- return ret;
- }
-
- if (streq(de->d_name, ".") || streq(de->d_name, ".."))
- continue;
-
- if (de->d_type == DT_UNKNOWN ||
- honour_sticky ||
- (de->d_type == DT_DIR && root_dev)) {
- if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
- if (ret == 0 && errno != ENOENT)
- ret = -errno;
- continue;
- }
-
- is_dir = S_ISDIR(st.st_mode);
- keep_around =
- honour_sticky &&
- (st.st_uid == 0 || st.st_uid == getuid()) &&
- (st.st_mode & S_ISVTX);
- } else {
- is_dir = de->d_type == DT_DIR;
- keep_around = false;
- }
-
- if (is_dir) {
- int subdir_fd;
-
- /* if root_dev is set, remove subdirectories only, if device is same as dir */
- if (root_dev && st.st_dev != root_dev->st_dev)
- continue;
-
- subdir_fd = openat(fd, de->d_name,
- O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME);
- if (subdir_fd < 0) {
- if (ret == 0 && errno != ENOENT)
- ret = -errno;
- continue;
- }
-
- r = rm_rf_children_dangerous(subdir_fd, only_dirs, honour_sticky, root_dev);
- if (r < 0 && ret == 0)
- ret = r;
-
- if (!keep_around)
- if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) {
- if (ret == 0 && errno != ENOENT)
- ret = -errno;
- }
-
- } else if (!only_dirs && !keep_around) {
-
- if (unlinkat(fd, de->d_name, 0) < 0) {
- if (ret == 0 && errno != ENOENT)
- ret = -errno;
- }
- }
- }
-}
-
-_pure_ static int is_temporary_fs(struct statfs *s) {
+bool is_temporary_fs(const struct statfs *s) {
assert(s);
return F_TYPE_EQUAL(s->f_type, TMPFS_MAGIC) ||
F_TYPE_EQUAL(s->f_type, RAMFS_MAGIC);
}
-int is_fd_on_temporary_fs(int fd) {
+int fd_is_temporary_fs(int fd) {
struct statfs s;
if (fstatfs(fd, &s) < 0)
return is_temporary_fs(&s);
}
-int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) {
- struct statfs s;
-
- assert(fd >= 0);
-
- if (fstatfs(fd, &s) < 0) {
- safe_close(fd);
- return -errno;
- }
-
- /* We refuse to clean disk file systems with this call. This
- * is extra paranoia just to be sure we never ever remove
- * non-state data */
- if (!is_temporary_fs(&s)) {
- log_error("Attempted to remove disk file system, and we can't allow that.");
- safe_close(fd);
- return -EPERM;
- }
-
- return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev);
-}
-
-static int file_is_priv_sticky(const char *p) {
- struct stat st;
-
- assert(p);
-
- if (lstat(p, &st) < 0)
- return -errno;
-
- return
- (st.st_uid == 0 || st.st_uid == getuid()) &&
- (st.st_mode & S_ISVTX);
-}
-
-static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) {
- int fd, r;
- struct statfs s;
-
- assert(path);
-
- /* We refuse to clean the root file system with this
- * call. This is extra paranoia to never cause a really
- * seriously broken system. */
- if (path_equal(path, "/")) {
- log_error("Attempted to remove entire root file system, and we can't allow that.");
- return -EPERM;
- }
-
- fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME);
- if (fd < 0) {
-
- if (errno != ENOTDIR && errno != ELOOP)
- return -errno;
-
- if (!dangerous) {
- if (statfs(path, &s) < 0)
- return -errno;
-
- if (!is_temporary_fs(&s)) {
- log_error("Attempted to remove disk file system, and we can't allow that.");
- return -EPERM;
- }
- }
-
- if (delete_root && !only_dirs)
- if (unlink(path) < 0 && errno != ENOENT)
- return -errno;
-
- return 0;
- }
-
- if (!dangerous) {
- if (fstatfs(fd, &s) < 0) {
- safe_close(fd);
- return -errno;
- }
-
- if (!is_temporary_fs(&s)) {
- log_error("Attempted to remove disk file system, and we can't allow that.");
- safe_close(fd);
- return -EPERM;
- }
- }
-
- r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL);
- if (delete_root) {
-
- if (honour_sticky && file_is_priv_sticky(path) > 0)
- return r;
-
- if (rmdir(path) < 0 && errno != ENOENT) {
- if (r == 0)
- r = -errno;
- }
- }
-
- return r;
-}
-
-int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) {
- return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false);
-}
-
-int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) {
- return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true);
-}
-
int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) {
assert(path);
/* If $FOO appears as single word, replace it by the split up variable */
if ((*i)[0] == '$' && (*i)[1] != '{') {
char *e;
- char **w, **m;
+ char **w, **m = NULL;
unsigned q;
e = strv_env_get(env, *i+1);
if (e) {
int r;
- r = strv_split_quoted(&m, e, true);
+ r = strv_split_quoted(&m, e, UNQUOTE_RELAX);
if (r < 0) {
ret[k] = NULL;
strv_free(ret);
return endswith(de->d_name, suffix);
}
-static int do_execute(const char *directory, usec_t timeout, char *argv[]) {
+static int do_execute(char **directories, usec_t timeout, char *argv[]) {
_cleanup_hashmap_free_free_ Hashmap *pids = NULL;
- _cleanup_closedir_ DIR *d;
- struct dirent *de;
+ _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 */
assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0);
- d = opendir(directory);
- if (!d) {
- if (errno == ENOENT)
- return 0;
-
- return log_error_errno(errno, "Failed to open directory %s: %m", directory);
- }
-
pids = hashmap_new(NULL);
if (!pids)
return log_oom();
- FOREACH_DIRENT(de, d, break) {
- _cleanup_free_ char *path = NULL;
- pid_t pid;
- int r;
+ seen = set_new(&string_hash_ops);
+ if (!seen)
+ return log_oom();
- if (!dirent_is_file(de))
- continue;
+ STRV_FOREACH(directory, directories) {
+ _cleanup_closedir_ DIR *d;
+ struct dirent *de;
- path = strjoin(directory, "/", de->d_name, NULL);
- if (!path)
- return log_oom();
+ d = opendir(*directory);
+ if (!d) {
+ if (errno == ENOENT)
+ continue;
- pid = fork();
- if (pid < 0) {
- log_error_errno(errno, "Failed to fork: %m");
- continue;
- } else if (pid == 0) {
- char *_argv[2];
+ return log_error_errno(errno, "Failed to open directory %s: %m", *directory);
+ }
- assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0);
+ FOREACH_DIRENT(de, d, break) {
+ _cleanup_free_ char *path = NULL;
+ pid_t pid;
+ int r;
- if (!argv) {
- _argv[0] = path;
- _argv[1] = NULL;
- argv = _argv;
- } else
- argv[0] = path;
+ if (!dirent_is_file(de))
+ continue;
- execv(path, argv);
- return log_error_errno(errno, "Failed to execute %s: %m", path);
- }
+ if (set_contains(seen, de->d_name)) {
+ log_debug("%1$s/%2$s skipped (%2$s was already seen).", *directory, de->d_name);
+ continue;
+ }
- log_debug("Spawned %s as " PID_FMT ".", path, pid);
+ r = set_put_strdup(seen, de->d_name);
+ if (r < 0)
+ return log_oom();
- r = hashmap_put(pids, UINT_TO_PTR(pid), path);
- 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;
+ }
- path = NULL;
+ 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
return 0;
}
-void execute_directory(const char *directory, usec_t timeout, char *argv[]) {
+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(directory);
+ assert(!strv_isempty(dirs));
- /* Executes all binaries in the directory in parallel and waits
- * for them to finish. Optionally a timeout is applied. */
+ 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) {
return;
} else if (executor_pid == 0) {
- r = do_execute(directory, timeout, argv);
+ r = do_execute(dirs, timeout, argv);
_exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS);
}
- wait_for_terminate_and_warn(directory, executor_pid, true);
+ wait_for_terminate_and_warn(name, executor_pid, true);
}
int kill_and_sigcont(pid_t pid, int sig) {
if (isempty(s))
return false;
+ /* Doesn't accept empty hostnames, hostnames with trailing or
+ * leading dots, and hostnames with multiple dots in a
+ * sequence. Also ensures that the length stays below
+ * HOST_NAME_MAX. */
+
for (p = s, dot = true; *p; p++) {
if (*p == '.') {
if (dot)
* useful in unit names, hence we enforce a stricter length
* limitation. */
- if (strlen(s) > 64)
- return false;
-
- return true;
-}
-
-bool image_name_is_valid(const char *s) {
- if (!filename_is_valid(s))
- return false;
-
- if (string_has_cc(s, NULL))
- return false;
-
- if (!utf8_is_valid(s))
- return false;
-
- /* Temporary files for atomically creating new files */
- if (startswith(s, ".#"))
+ if (strlen(s) > 64)
return false;
return true;
return r;
}
-bool is_valid_documentation_url(const char *url) {
- assert(url);
+bool http_etag_is_valid(const char *etag) {
+ if (isempty(etag))
+ return false;
- if (startswith(url, "http://") && url[7])
- return true;
+ if (!endswith(etag, "\""))
+ return false;
- if (startswith(url, "https://") && url[8])
- return true;
+ if (!startswith(etag, "\"") && !startswith(etag, "W/\""))
+ return false;
- if (startswith(url, "file:") && url[5])
- return true;
+ return true;
+}
- if (startswith(url, "info:") && url[5])
- 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 (startswith(url, "man:") && url[4])
+ if (isempty(url))
+ return false;
+
+ if (http_url_is_valid(url))
return true;
- return false;
+ 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) {
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;
d = opendir("/sys/class/power_supply");
if (!d)
- return -errno;
+ return errno == ENOENT ? true : -errno;
for (;;) {
struct dirent *de;
_cleanup_free_ char *word = NULL;
char *value = NULL;
- r = unquote_first_word(&p, &word, true);
+ r = unquote_first_word(&p, &word, UNQUOTE_RELAX);
if (r < 0)
return r;
if (r == 0)
_cleanup_free_ char *word = NULL;
const char *e;
- r = unquote_first_word(&p, &word, true);
+ r = unquote_first_word(&p, &word, UNQUOTE_RELAX);
if (r < 0)
return r;
if (r == 0)
assert(machine);
assert(pid);
- p = strappenda("/run/systemd/machines/", machine);
+ p = strjoina("/run/systemd/machines/", machine);
r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL);
if (r == -ENOENT)
return -EHOSTDOWN;
if (isempty(s)) {
free(s);
- return -ENOTSUP;
+ return -EOPNOTSUPP;
}
*ret = s;
#endif
/* Fall back to unguessable name + unlinking */
- p = strappenda(path, "/systemd-tmp-XXXXXX");
+ p = strjoina(path, "/systemd-tmp-XXXXXX");
fd = mkostemp_safe(p, flags);
if (fd < 0)
return (uint64_t) mem * (uint64_t) page_size();
}
-char* mount_test_option(const char *haystack, const char *needle) {
-
- struct mntent me = {
- .mnt_opts = (char*) haystack
- };
-
- assert(needle);
-
- /* Like glibc's hasmntopt(), but works on a string, not a
- * struct mntent */
-
- if (!haystack)
- return NULL;
-
- return hasmntopt(&me, needle);
-}
-
void hexdump(FILE *f, const void *p, size_t s) {
const uint8_t *b = p;
unsigned n = 0;
continue;
}
- p = cunescape(path);
- if (!p)
- return -ENOMEM;
+ r = cunescape(path, UNESCAPE_RELAX, &p);
+ if (r < 0)
+ return r;
if (!path_startswith(p, prefix))
continue;
continue;
}
- p = cunescape(path);
- if (!p)
- return -ENOMEM;
+ r = cunescape(path, UNESCAPE_RELAX, &p);
+ if (r < 0)
+ return r;
/* Let's ignore autofs mounts. If they aren't
* triggered yet, we want to avoid triggering
* awfully racy, and thus we just won't do them. */
if (root)
- path = strappenda(root, "/etc/.pwd.lock");
+ path = strjoina(root, "/etc/.pwd.lock");
else
path = "/etc/.pwd.lock";
return !!S_ISDIR(st.st_mode);
}
-int unquote_first_word(const char **p, char **ret, bool relax) {
+int unquote_first_word(const char **p, char **ret, UnquoteFlags flags) {
_cleanup_free_ char *s = NULL;
size_t allocated = 0, sz = 0;
+ int r;
enum {
START,
case VALUE_ESCAPE:
if (c == 0) {
- if (relax)
+ if (flags & UNQUOTE_RELAX)
goto finish;
return -EINVAL;
}
if (!GREEDY_REALLOC(s, allocated, sz+2))
return -ENOMEM;
+ if (flags & UNQUOTE_CUNESCAPE) {
+ r = cunescape_one(*p, (size_t) -1, &c);
+ if (r < 0)
+ return -EINVAL;
+
+ (*p) += r - 1;
+ }
+
s[sz++] = c;
state = VALUE;
case SINGLE_QUOTE:
if (c == 0) {
- if (relax)
+ if (flags & UNQUOTE_RELAX)
goto finish;
return -EINVAL;
} else if (c == '\'')
case SINGLE_QUOTE_ESCAPE:
if (c == 0) {
- if (relax)
+ if (flags & UNQUOTE_RELAX)
goto finish;
return -EINVAL;
}
if (!GREEDY_REALLOC(s, allocated, sz+2))
return -ENOMEM;
+ if (flags & UNQUOTE_CUNESCAPE) {
+ r = cunescape_one(*p, (size_t) -1, &c);
+ if (r < 0)
+ return -EINVAL;
+
+ (*p) += r - 1;
+ }
+
s[sz++] = c;
state = SINGLE_QUOTE;
break;
case DOUBLE_QUOTE_ESCAPE:
if (c == 0) {
- if (relax)
+ if (flags & UNQUOTE_RELAX)
goto finish;
return -EINVAL;
}
if (!GREEDY_REALLOC(s, allocated, sz+2))
return -ENOMEM;
+ if (flags & UNQUOTE_CUNESCAPE) {
+ r = cunescape_one(*p, (size_t) -1, &c);
+ if (r < 0)
+ return -EINVAL;
+
+ (*p) += r - 1;
+ }
+
s[sz++] = c;
state = DOUBLE_QUOTE;
break;
return 1;
}
-int unquote_many_words(const char **p, ...) {
+int unquote_many_words(const char **p, UnquoteFlags flags, ...) {
va_list ap;
char **l;
int n = 0, i, c, r;
assert(p);
/* Count how many words are expected */
- va_start(ap, p);
+ va_start(ap, flags);
for (;;) {
if (!va_arg(ap, char **))
break;
l = newa0(char*, n);
for (c = 0; c < n; c++) {
- r = unquote_first_word(p, &l[c], false);
+ r = unquote_first_word(p, &l[c], flags);
if (r < 0) {
int j;
/* If we managed to parse all words, return them in the passed
* in parameters */
- va_start(ap, p);
+ va_start(ap, flags);
for (i = 0; i < n; i++) {
char **v;
return 0;
}
-int same_fd(int a, int b) {
- struct stat sta, stb;
- pid_t pid;
- int r, fa, fb;
-
- assert(a >= 0);
- assert(b >= 0);
+int chattr_fd(int fd, bool b, unsigned mask) {
+ unsigned old_attr, new_attr;
- /* Compares two file descriptors. Note that semantics are
- * quite different depending on whether we have kcmp() or we
- * don't. If we have kcmp() this will only return true for
- * dup()ed file descriptors, but not otherwise. If we don't
- * have kcmp() this will also return true for two fds of the same
- * file, created by separate open() calls. Since we use this
- * call mostly for filtering out duplicates in the fd store
- * this difference hopefully doesn't matter too much. */
+ assert(fd >= 0);
- if (a == b)
- return true;
+ if (mask == 0)
+ return 0;
- /* Try to use kcmp() if we have it. */
- pid = getpid();
- r = kcmp(pid, pid, KCMP_FILE, a, b);
- if (r == 0)
- return true;
- if (r > 0)
- return false;
- if (errno != ENOSYS)
+ if (ioctl(fd, FS_IOC_GETFLAGS, &old_attr) < 0)
return -errno;
- /* We don't have kcmp(), use fstat() instead. */
- if (fstat(a, &sta) < 0)
- return -errno;
+ if (b)
+ new_attr = old_attr | mask;
+ else
+ new_attr = old_attr & ~mask;
- if (fstat(b, &stb) < 0)
- return -errno;
+ if (new_attr == old_attr)
+ return 0;
- if ((sta.st_mode & S_IFMT) != (stb.st_mode & S_IFMT))
- return false;
+ if (ioctl(fd, FS_IOC_SETFLAGS, &new_attr) < 0)
+ return -errno;
- /* We consider all device fds different, since two device fds
- * might refer to quite different device contexts even though
- * they share the same inode and backing dev_t. */
+ return 0;
+}
- if (S_ISCHR(sta.st_mode) || S_ISBLK(sta.st_mode))
- return false;
+int chattr_path(const char *p, bool b, unsigned mask) {
+ _cleanup_close_ int fd = -1;
- if (sta.st_dev != stb.st_dev || sta.st_ino != stb.st_ino)
- return false;
+ assert(p);
- /* The fds refer to the same inode on disk, let's also check
- * if they have the same fd flags. This is useful to
- * distuingish the read and write side of a pipe created with
- * pipe(). */
- fa = fcntl(a, F_GETFL);
- if (fa < 0)
- return -errno;
+ if (mask == 0)
+ return 0;
- fb = fcntl(b, F_GETFL);
- if (fb < 0)
+ fd = open(p, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
+ if (fd < 0)
return -errno;
- return fa == fb;
+ return chattr_fd(fd, b, mask);
}
-int chattr_fd(int fd, bool b, int mask) {
- int old_attr, new_attr;
+int change_attr_fd(int fd, unsigned value, unsigned mask) {
+ unsigned old_attr, new_attr;
assert(fd >= 0);
+ if (mask == 0)
+ return 0;
+
if (ioctl(fd, FS_IOC_GETFLAGS, &old_attr) < 0)
return -errno;
- if (b)
- new_attr = old_attr | mask;
- else
- new_attr = old_attr & ~mask;
+ new_attr = (old_attr & ~mask) |(value & mask);
if (new_attr == old_attr)
return 0;
return 0;
}
-int chattr_path(const char *p, bool b, int mask) {
+int read_attr_fd(int fd, unsigned *ret) {
+ assert(fd >= 0);
+
+ if (ioctl(fd, FS_IOC_GETFLAGS, ret) < 0)
+ return -errno;
+
+ return 0;
+}
+
+int read_attr_path(const char *p, unsigned *ret) {
_cleanup_close_ int fd = -1;
- fd = open(p, O_RDWR|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
+ assert(p);
+ assert(ret);
+
+ fd = open(p, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
if (fd < 0)
return -errno;
- return chattr_fd(fd, b, mask);
+ return read_attr_fd(fd, ret);
+}
+
+int make_lock_file(const char *p, int operation, LockFile *ret) {
+ _cleanup_close_ int fd = -1;
+ _cleanup_free_ char *t = NULL;
+ int r;
+
+ /*
+ * We use UNPOSIX locks if they are available. They have nice
+ * semantics, and are mostly compatible with NFS. However,
+ * they are only available on new kernels. When we detect we
+ * are running on an older kernel, then we fall back to good
+ * old BSD locks. They also have nice semantics, but are
+ * slightly problematic on NFS, where they are upgraded to
+ * POSIX locks, even though locally they are orthogonal to
+ * POSIX locks.
+ */
+
+ t = strdup(p);
+ if (!t)
+ return -ENOMEM;
+
+ for (;;) {
+ struct flock fl = {
+ .l_type = (operation & ~LOCK_NB) == LOCK_EX ? F_WRLCK : F_RDLCK,
+ .l_whence = SEEK_SET,
+ };
+ struct stat st;
+
+ fd = open(p, O_CREAT|O_RDWR|O_NOFOLLOW|O_CLOEXEC|O_NOCTTY, 0600);
+ if (fd < 0)
+ return -errno;
+
+ r = fcntl(fd, (operation & LOCK_NB) ? F_OFD_SETLK : F_OFD_SETLKW, &fl);
+ if (r < 0) {
+
+ /* If the kernel is too old, use good old BSD locks */
+ if (errno == EINVAL)
+ r = flock(fd, operation);
+
+ if (r < 0)
+ return errno == EAGAIN ? -EBUSY : -errno;
+ }
+
+ /* If we acquired the lock, let's check if the file
+ * still exists in the file system. If not, then the
+ * previous exclusive owner removed it and then closed
+ * it. In such a case our acquired lock is worthless,
+ * hence try again. */
+
+ r = fstat(fd, &st);
+ if (r < 0)
+ return -errno;
+ if (st.st_nlink > 0)
+ break;
+
+ fd = safe_close(fd);
+ }
+
+ ret->path = t;
+ ret->fd = fd;
+ ret->operation = operation;
+
+ fd = -1;
+ t = NULL;
+
+ return r;
+}
+
+int make_lock_file_for(const char *p, int operation, LockFile *ret) {
+ const char *fn;
+ char *t;
+
+ assert(p);
+ assert(ret);
+
+ fn = basename(p);
+ if (!filename_is_valid(fn))
+ return -EINVAL;
+
+ t = newa(char, strlen(p) + 2 + 4 + 1);
+ stpcpy(stpcpy(stpcpy(mempcpy(t, p, fn - p), ".#"), fn), ".lck");
+
+ return make_lock_file(t, operation, ret);
+}
+
+void release_lock_file(LockFile *f) {
+ int r;
+
+ if (!f)
+ return;
+
+ if (f->path) {
+
+ /* If we are the exclusive owner we can safely delete
+ * the lock file itself. If we are not the exclusive
+ * owner, we can try becoming it. */
+
+ if (f->fd >= 0 &&
+ (f->operation & ~LOCK_NB) == LOCK_SH) {
+ static const struct flock fl = {
+ .l_type = F_WRLCK,
+ .l_whence = SEEK_SET,
+ };
+
+ r = fcntl(f->fd, F_OFD_SETLK, &fl);
+ if (r < 0 && errno == EINVAL)
+ r = flock(f->fd, LOCK_EX|LOCK_NB);
+
+ if (r >= 0)
+ f->operation = LOCK_EX|LOCK_NB;
+ }
+
+ if ((f->operation & ~LOCK_NB) == LOCK_EX)
+ unlink_noerrno(f->path);
+
+ free(f->path);
+ f->path = NULL;
+ }
+
+ f->fd = safe_close(f->fd);
+ f->operation = 0;
+}
+
+static size_t nul_length(const uint8_t *p, size_t sz) {
+ size_t n = 0;
+
+ while (sz > 0) {
+ if (*p != 0)
+ break;
+
+ n++;
+ p++;
+ sz--;
+ }
+
+ return n;
+}
+
+ssize_t sparse_write(int fd, const void *p, size_t sz, size_t run_length) {
+ const uint8_t *q, *w, *e;
+ ssize_t l;
+
+ q = w = p;
+ e = q + sz;
+ while (q < e) {
+ size_t n;
+
+ n = nul_length(q, e - q);
+
+ /* If there are more than the specified run length of
+ * NUL bytes, or if this is the beginning or the end
+ * of the buffer, then seek instead of write */
+ if ((n > run_length) ||
+ (n > 0 && q == p) ||
+ (n > 0 && q + n >= e)) {
+ if (q > w) {
+ l = write(fd, w, q - w);
+ if (l < 0)
+ return -errno;
+ if (l != q -w)
+ return -EIO;
+ }
+
+ if (lseek(fd, n, SEEK_CUR) == (off_t) -1)
+ return -errno;
+
+ q += n;
+ w = q;
+ } else if (n > 0)
+ q += n;
+ else
+ q ++;
+ }
+
+ if (q > w) {
+ l = write(fd, w, q - w);
+ if (l < 0)
+ return -errno;
+ if (l != q - w)
+ return -EIO;
+ }
+
+ return q - (const uint8_t*) p;
+}
+
+void sigkill_wait(pid_t *pid) {
+ if (!pid)
+ return;
+ if (*pid <= 1)
+ return;
+
+ if (kill(*pid, SIGKILL) > 0)
+ (void) wait_for_terminate(*pid, NULL);
+}
+
+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;
+}
+
+void cmsg_close_all(struct msghdr *mh) {
+ struct cmsghdr *cmsg;
+
+ assert(mh);
+
+ for (cmsg = CMSG_FIRSTHDR(mh); cmsg; cmsg = CMSG_NXTHDR(mh, cmsg))
+ if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS)
+ close_many((int*) CMSG_DATA(cmsg), (cmsg->cmsg_len - CMSG_LEN(0)) / sizeof(int));
+}
+
+int rename_noreplace(int olddirfd, const char *oldpath, int newdirfd, const char *newpath) {
+ struct stat buf;
+ int ret;
+
+ ret = renameat2(olddirfd, oldpath, newdirfd, newpath, RENAME_NOREPLACE);
+ if (ret >= 0)
+ return 0;
+
+ /* Even though renameat2() exists since Linux 3.15, btrfs added
+ * support for it later. If it is not implemented, fallback to another
+ * method. */
+ if (errno != EINVAL)
+ return -errno;
+
+ /* The link()/unlink() fallback does not work on directories. But
+ * renameat() without RENAME_NOREPLACE gives the same semantics on
+ * directories, except when newpath is an *empty* directory. This is
+ * good enough. */
+ ret = fstatat(olddirfd, oldpath, &buf, AT_SYMLINK_NOFOLLOW);
+ if (ret >= 0 && S_ISDIR(buf.st_mode)) {
+ ret = renameat(olddirfd, oldpath, newdirfd, newpath);
+ return ret >= 0 ? 0 : -errno;
+ }
+
+ /* If it is not a directory, use the link()/unlink() fallback. */
+ ret = linkat(olddirfd, oldpath, newdirfd, newpath, 0);
+ if (ret < 0)
+ return -errno;
+
+ ret = unlinkat(olddirfd, oldpath, 0);
+ if (ret < 0) {
+ /* backup errno before the following unlinkat() alters it */
+ ret = errno;
+ (void) unlinkat(newdirfd, newpath, 0);
+ errno = ret;
+ return -errno;
+ }
+
+ return 0;
}
~ianmdlvl / elogind.git / blobdiff