2 * Copyright (C) 2006-2009 Kay Sievers <kay@vrfy.org>
3 * Copyright (C) 2009 Canonical Ltd.
4 * Copyright (C) 2009 Scott James Remnant <scott@netsplit.com>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
32 #include <sys/inotify.h>
35 #include <sys/types.h>
39 static int adm_settle(struct udev *udev, int argc, char *argv[])
41 static const struct option options[] = {
42 { "seq-start", required_argument, NULL, 's' },
43 { "seq-end", required_argument, NULL, 'e' },
44 { "timeout", required_argument, NULL, 't' },
45 { "exit-if-exists", required_argument, NULL, 'E' },
46 { "quiet", no_argument, NULL, 'q' },
47 { "help", no_argument, NULL, 'h' },
50 unsigned long long start_usec = now_usec();
51 unsigned long long start = 0;
52 unsigned long long end = 0;
54 const char *exists = NULL;
55 unsigned int timeout = 120;
57 struct udev_queue *udev_queue = NULL;
58 int rc = EXIT_FAILURE;
60 dbg(udev, "version %s\n", VERSION);
66 option = getopt_long(argc, argv, "s:e:t:E:qh", options, NULL);
72 start = strtoull(optarg, NULL, 0);
75 end = strtoull(optarg, NULL, 0);
78 seconds = atoi(optarg);
82 fprintf(stderr, "invalid timeout value\n");
83 dbg(udev, "timeout=%i\n", timeout);
92 printf("Usage: udevadm settle OPTIONS\n"
93 " --timeout=<seconds> maximum time to wait for events\n"
94 " --seq-start=<seqnum> first seqnum to wait for\n"
95 " --seq-end=<seqnum> last seqnum to wait for\n"
96 " --exit-if-exists=<file> stop waiting if file exists\n"
97 " --quiet do not print list after timeout\n"
105 udev_queue = udev_queue_new(udev);
106 if (udev_queue == NULL)
110 unsigned long long kernel_seq;
112 kernel_seq = udev_queue_get_kernel_seqnum(udev_queue);
114 /* unless specified, the last event is the current kernel seqnum */
116 end = udev_queue_get_kernel_seqnum(udev_queue);
119 err(udev, "seq-start larger than seq-end, ignoring\n");
124 if (start > kernel_seq || end > kernel_seq) {
125 err(udev, "seq-start or seq-end larger than current kernel value, ignoring\n");
129 info(udev, "start=%llu end=%llu current=%llu\n", start, end, kernel_seq);
132 err(udev, "seq-end needs seq-start parameter, ignoring\n");
137 /* guarantee that the udev daemon isn't pre-processing */
139 struct udev_ctrl *uctrl;
141 uctrl = udev_ctrl_new(udev);
143 if (udev_ctrl_send_ping(uctrl, timeout) < 0) {
144 info(udev, "no connection to daemon\n");
145 udev_ctrl_unref(uctrl);
149 udev_ctrl_unref(uctrl);
153 pfd[0].events = POLLIN;
154 pfd[0].fd = inotify_init1(IN_CLOEXEC);
156 err(udev, "inotify_init failed: %m\n");
158 if (inotify_add_watch(pfd[0].fd, udev_get_run_path(udev), IN_MOVED_TO) < 0) {
159 err(udev, "watching '%s' failed\n", udev_get_run_path(udev));
168 if (exists != NULL && stat(exists, &statbuf) == 0) {
174 /* if asked for, wait for a specific sequence of events */
175 if (udev_queue_get_seqnum_sequence_is_finished(udev_queue, start, end) == 1) {
180 /* exit if queue is empty */
181 if (udev_queue_get_queue_is_empty(udev_queue)) {
187 if (pfd[0].fd >= 0) {
190 if (exists != NULL || start > 0)
194 /* wake up after delay, or immediately after the queue is rebuilt */
195 if (poll(pfd, 1, delay) > 0 && pfd[0].revents & POLLIN) {
196 char buf[sizeof(struct inotify_event) + PATH_MAX];
198 read(pfd[0].fd, buf, sizeof(buf));
205 unsigned long long age_usec;
207 age_usec = now_usec() - start_usec;
208 if (age_usec / (1000 * 1000) >= timeout) {
209 struct udev_list_entry *list_entry;
211 if (!quiet && udev_queue_get_queued_list_entry(udev_queue) != NULL) {
212 info(udev, "timeout waiting for udev queue\n");
213 printf("\nudevadm settle - timeout of %i seconds reached, the event queue contains:\n", timeout);
214 udev_list_entry_foreach(list_entry, udev_queue_get_queued_list_entry(udev_queue))
216 udev_list_entry_get_name(list_entry),
217 udev_list_entry_get_value(list_entry));
227 udev_queue_unref(udev_queue);
231 const struct udevadm_cmd udevadm_settle = {
234 .help = "wait for the event queue to finish",