diff options
Diffstat (limited to 'udev/udev-watch.c')
| -rw-r--r-- | udev/udev-watch.c | 170 |
1 files changed, 0 insertions, 170 deletions
diff --git a/udev/udev-watch.c b/udev/udev-watch.c deleted file mode 100644 index 0ec8bfd627..0000000000 --- a/udev/udev-watch.c +++ /dev/null @@ -1,170 +0,0 @@ -/* - * Copyright (C) 2004-2010 Kay Sievers <kay.sievers@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 <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 <sys/inotify.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) - err(udev, "inotify_init failed: %m\n"); - return inotify_fd; -} - -/* move any old watches directory out of the way, and then restore - * the watches - */ -void udev_watch_restore(struct udev *udev) -{ - char filename[UTIL_PATH_SIZE], oldname[UTIL_PATH_SIZE]; - - if (inotify_fd < 0) - return; - - util_strscpyl(oldname, sizeof(oldname), udev_get_run_path(udev), "/watch.old", NULL); - util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/watch", NULL); - if (rename(filename, oldname) == 0) { - DIR *dir; - struct dirent *ent; - - dir = opendir(oldname); - if (dir == NULL) { - err(udev, "unable to open old watches dir '%s', old watches will not be restored: %m", oldname); - return; - } - - for (ent = readdir(dir); ent != NULL; ent = readdir(dir)) { - char device[UTIL_PATH_SIZE]; - char *s; - size_t l; - ssize_t len; - struct udev_device *dev; - - if (ent->d_name[0] == '.') - continue; - - s = device; - l = util_strpcpy(&s, sizeof(device), udev_get_sys_path(udev)); - len = readlinkat(dirfd(dir), ent->d_name, s, l); - if (len <= 0 || len == (ssize_t)l) - goto unlink; - s[len] = '\0'; - - dev = udev_device_new_from_id_filename(udev, s); - if (dev == NULL) - goto unlink; - - info(udev, "restoring old watch on '%s'\n", 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(oldname); - - } else if (errno != ENOENT) { - err(udev, "unable to move watches dir '%s', old watches will not be restored: %m", filename); - } -} - -void udev_watch_begin(struct udev *udev, struct udev_device *dev) -{ - char filename[UTIL_PATH_SIZE]; - int wd; - - if (inotify_fd < 0) - return; - - info(udev, "adding watch on '%s'\n", udev_device_get_devnode(dev)); - wd = inotify_add_watch(inotify_fd, udev_device_get_devnode(dev), IN_CLOSE_WRITE); - if (wd < 0) { - err(udev, "inotify_add_watch(%d, %s, %o) failed: %m\n", - inotify_fd, udev_device_get_devnode(dev), IN_CLOSE_WRITE); - return; - } - - snprintf(filename, sizeof(filename), "%s/watch/%d", udev_get_run_path(udev), wd); - util_create_path(udev, filename); - unlink(filename); - symlink(udev_device_get_id_filename(dev), filename); - - udev_device_set_watch_handle(dev, wd); -} - -void udev_watch_end(struct udev *udev, struct udev_device *dev) -{ - int wd; - char filename[UTIL_PATH_SIZE]; - - if (inotify_fd < 0) - return; - - wd = udev_device_get_watch_handle(dev); - if (wd < 0) - return; - - info(udev, "removing watch on '%s'\n", udev_device_get_devnode(dev)); - inotify_rm_watch(inotify_fd, wd); - - snprintf(filename, sizeof(filename), "%s/watch/%d", udev_get_run_path(udev), 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]; - char majmin[UTIL_PATH_SIZE]; - char *s; - size_t l; - ssize_t len; - - if (inotify_fd < 0 || wd < 0) - return NULL; - - snprintf(filename, sizeof(filename), "%s/watch/%d", udev_get_run_path(udev), wd); - s = majmin; - l = util_strpcpy(&s, sizeof(majmin), udev_get_sys_path(udev)); - len = readlink(filename, s, l); - if (len <= 0 || (size_t)len == l) - return NULL; - s[len] = '\0'; - - return udev_device_new_from_id_filename(udev, s); -} |