diff options
Diffstat (limited to 'src/udev/udev-watch.c')
| -rw-r--r-- | src/udev/udev-watch.c | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/src/udev/udev-watch.c b/src/udev/udev-watch.c deleted file mode 100644 index bc9096ed0c..0000000000 --- a/src/udev/udev-watch.c +++ /dev/null @@ -1,152 +0,0 @@ -/* - * Copyright (C) 2004-2012 Kay Sievers <kay@vrfy.org> - * Copyright (C) 2009 Canonical Ltd. - * Copyright (C) 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 <dirent.h> -#include <errno.h> -#include <stddef.h> -#include <stdio.h> -#include <sys/inotify.h> -#include <unistd.h> - -#include "stdio-util.h" -#include "udev.h" - -static int inotify_fd = -1; - -/* inotify descriptor, will be shared with rules directory; - * set to cloexec since we need our children to be able to add - * watches for us - */ -int udev_watch_init(struct udev *udev) { - inotify_fd = inotify_init1(IN_CLOEXEC); - if (inotify_fd < 0) - 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) { - if (inotify_fd < 0) - return; - - if (rename("/run/udev/watch", "/run/udev/watch.old") == 0) { - DIR *dir; - struct dirent *ent; - - dir = opendir("/run/udev/watch.old"); - if (dir == NULL) { - 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)) { - char device[UTIL_PATH_SIZE]; - ssize_t len; - struct udev_device *dev; - - if (ent->d_name[0] == '.') - continue; - - len = readlinkat(dirfd(dir), ent->d_name, device, sizeof(device)); - if (len <= 0 || len == (ssize_t)sizeof(device)) - goto unlink; - device[len] = '\0'; - - dev = udev_device_new_from_device_id(udev, device); - if (dev == NULL) - goto unlink; - - 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); - } - - closedir(dir); - rmdir("/run/udev/watch.old"); - - } 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[sizeof("/run/udev/watch/") + DECIMAL_STR_MAX(int)]; - int wd; - int r; - - if (inotify_fd < 0) - return; - - 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_errno(errno, "inotify_add_watch(%d, %s, %o) failed: %m", - inotify_fd, udev_device_get_devnode(dev), IN_CLOSE_WRITE); - return; - } - - 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_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) { - int wd; - char filename[sizeof("/run/udev/watch/") + DECIMAL_STR_MAX(int)]; - - if (inotify_fd < 0) - return; - - wd = udev_device_get_watch_handle(dev); - if (wd < 0) - return; - - log_debug("removing watch on '%s'", udev_device_get_devnode(dev)); - inotify_rm_watch(inotify_fd, 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[sizeof("/run/udev/watch/") + DECIMAL_STR_MAX(int)]; - char device[UTIL_NAME_SIZE]; - ssize_t len; - - if (inotify_fd < 0 || wd < 0) - return NULL; - - xsprintf(filename, "/run/udev/watch/%d", wd); - len = readlink(filename, device, sizeof(device)); - if (len <= 0 || (size_t)len == sizeof(device)) - return NULL; - device[len] = '\0'; - - return udev_device_new_from_device_id(udev, device); -} |