+/* SPDX-License-Identifier: GPL-2.0+ */
/*
- * Copyright (C) 2004-2012 Kay Sievers <kay@vrfy.org>
- * Copyright (C) 2009 Canonical Ltd.
- * Copyright (C) 2009 Scott James Remnant <scott@netsplit.com>
+ * Copyright © 2004-2012 Kay Sievers <kay@vrfy.org>
+ * Copyright © 2009 Canonical Ltd.
+ * Copyright © 2009 Scott James Remnant <scott@netsplit.com>
*
- * This program 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.
- *
- * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
-#include <sys/types.h>
#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <dirent.h>
#include <stddef.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
+#include <stdio.h>
#include <sys/inotify.h>
+#include <unistd.h>
+#include "dirent-util.h"
+#include "stdio-util.h"
#include "udev.h"
static int inotify_fd = -1;
* set to cloexec since we need our children to be able to add
* watches for us
*/
-int udev_watch_init(struct udev *udev)
-{
+int udev_watch_init(struct udev *udev) {
inotify_fd = inotify_init1(IN_CLOEXEC);
if (inotify_fd < 0)
- log_error("inotify_init failed: %m\n");
+ log_error_errno(errno, "inotify_init failed: %m");
return inotify_fd;
}
/* move any old watches directory out of the way, and then restore
* the watches
*/
-void udev_watch_restore(struct udev *udev)
-{
+void udev_watch_restore(struct udev *udev) {
if (inotify_fd < 0)
return;
dir = opendir("/run/udev/watch.old");
if (dir == NULL) {
- log_error("unable to open old watches dir /run/udev/watch.old; old watches will not be restored: %m");
+ log_error_errno(errno, "unable to open old watches dir /run/udev/watch.old; old watches will not be restored: %m");
return;
}
- for (ent = readdir(dir); ent != NULL; ent = readdir(dir)) {
+ FOREACH_DIRENT_ALL(ent, dir, break) {
char device[UTIL_PATH_SIZE];
ssize_t len;
struct udev_device *dev;
if (dev == NULL)
goto unlink;
- log_debug("restoring old watch on '%s'\n", udev_device_get_devnode(dev));
+ log_debug("restoring old watch on '%s'", udev_device_get_devnode(dev));
udev_watch_begin(udev, dev);
udev_device_unref(dev);
unlink:
- unlinkat(dirfd(dir), ent->d_name, 0);
+ (void) unlinkat(dirfd(dir), ent->d_name, 0);
}
closedir(dir);
rmdir("/run/udev/watch.old");
- } else if (errno != ENOENT) {
- log_error("unable to move watches dir /run/udev/watch; old watches will not be restored: %m");
- }
+ } else if (errno != ENOENT)
+ log_error_errno(errno, "unable to move watches dir /run/udev/watch; old watches will not be restored: %m");
}
-void udev_watch_begin(struct udev *udev, struct udev_device *dev)
-{
- char filename[UTIL_PATH_SIZE];
+void udev_watch_begin(struct udev *udev, struct udev_device *dev) {
+ char filename[sizeof("/run/udev/watch/") + DECIMAL_STR_MAX(int)];
int wd;
int r;
if (inotify_fd < 0)
return;
- log_debug("adding watch on '%s'\n", udev_device_get_devnode(dev));
+ log_debug("adding watch on '%s'", udev_device_get_devnode(dev));
wd = inotify_add_watch(inotify_fd, udev_device_get_devnode(dev), IN_CLOSE_WRITE);
if (wd < 0) {
- log_error("inotify_add_watch(%d, %s, %o) failed: %m\n",
- inotify_fd, udev_device_get_devnode(dev), IN_CLOSE_WRITE);
+ log_error_errno(errno, "inotify_add_watch(%d, %s, %o) failed: %m",
+ inotify_fd, udev_device_get_devnode(dev), IN_CLOSE_WRITE);
return;
}
- snprintf(filename, sizeof(filename), "/run/udev/watch/%d", wd);
+ xsprintf(filename, "/run/udev/watch/%d", wd);
mkdir_parents(filename, 0755);
unlink(filename);
r = symlink(udev_device_get_id_filename(dev), filename);
if (r < 0)
- log_error("Failed to create symlink %s: %m", filename);
+ log_error_errno(errno, "Failed to create symlink %s: %m", filename);
udev_device_set_watch_handle(dev, wd);
}
-void udev_watch_end(struct udev *udev, struct udev_device *dev)
-{
+void udev_watch_end(struct udev *udev, struct udev_device *dev) {
int wd;
- char filename[UTIL_PATH_SIZE];
+ char filename[sizeof("/run/udev/watch/") + DECIMAL_STR_MAX(int)];
if (inotify_fd < 0)
return;
if (wd < 0)
return;
- log_debug("removing watch on '%s'\n", udev_device_get_devnode(dev));
+ log_debug("removing watch on '%s'", udev_device_get_devnode(dev));
inotify_rm_watch(inotify_fd, wd);
- snprintf(filename, sizeof(filename), "/run/udev/watch/%d", wd);
+ xsprintf(filename, "/run/udev/watch/%d", wd);
unlink(filename);
udev_device_set_watch_handle(dev, -1);
}
-struct udev_device *udev_watch_lookup(struct udev *udev, int wd)
-{
- char filename[UTIL_PATH_SIZE];
+struct udev_device *udev_watch_lookup(struct udev *udev, int wd) {
+ char filename[sizeof("/run/udev/watch/") + DECIMAL_STR_MAX(int)];
char device[UTIL_NAME_SIZE];
ssize_t len;
if (inotify_fd < 0 || wd < 0)
return NULL;
- snprintf(filename, sizeof(filename), "/run/udev/watch/%d", wd);
+ xsprintf(filename, "/run/udev/watch/%d", wd);
len = readlink(filename, device, sizeof(device));
if (len <= 0 || (size_t)len == sizeof(device))
return NULL;
projects / thirdparty / systemd.git / blobdiff