2 * Copyright (C) 2006-2008 Kay Sievers <kay@vrfy.org>
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
30 #include <sys/types.h>
34 #define DEFAULT_TIMEOUT 180
35 #define LOOP_PER_SECOND 20
37 static int volatile is_timeout;
39 static void asmlinkage sig_handler(int signum)
47 int udevadm_settle(struct udev *udev, int argc, char *argv[])
49 static const struct option options[] = {
50 { "seq-start", required_argument, NULL, 's' },
51 { "seq-end", required_argument, NULL, 'e' },
52 { "timeout", required_argument, NULL, 't' },
53 { "quiet", no_argument, NULL, 'q' },
54 { "help", no_argument, NULL, 'h' },
57 unsigned long long start = 0;
58 unsigned long long end = 0;
62 struct udev_queue *udev_queue = NULL;
65 dbg(udev, "version %s\n", VERSION);
67 /* set signal handlers */
68 memset(&act, 0x00, sizeof(act));
69 act.sa_handler = (void (*)(int)) sig_handler;
70 sigemptyset (&act.sa_mask);
72 sigaction(SIGALRM, &act, NULL);
78 option = getopt_long(argc, argv, "s:e:t:qh", options, NULL);
84 start = strtoull(optarg, NULL, 0);
87 end = strtoull(optarg, NULL, 0);
90 seconds = atoi(optarg);
94 fprintf(stderr, "invalid timeout value\n");
95 dbg(udev, "timeout=%i\n", timeout);
101 printf("Usage: udevadm settle OPTIONS\n"
102 " --timeout=<seconds> maximum time to wait for events\n"
103 " --seq-start=<seqnum> first seqnum to wait for\n"
104 " --seq-end=<seqnum> last seqnum to wait for\n"
105 " --quiet do not print list after timeout\n"
114 alarm(DEFAULT_TIMEOUT);
116 udev_queue = udev_queue_new(udev);
117 if (udev_queue == NULL)
121 unsigned long long kernel_seq;
123 kernel_seq = udev_queue_get_kernel_seqnum(udev_queue);
125 /* unless specified, the last event is the current kernel seqnum */
127 end = udev_queue_get_kernel_seqnum(udev_queue);
130 err(udev, "seq-start larger than seq-end, ignoring\n");
131 fprintf(stderr, "seq-start larger than seq-end, ignoring\n");
136 if (start > kernel_seq || end > kernel_seq) {
137 err(udev, "seq-start or seq-end larger than current kernel value, ignoring\n");
138 fprintf(stderr, "seq-start or seq-end larger than current kernel value, ignoring\n");
142 info(udev, "start=%llu end=%llu current=%llu\n", start, end, kernel_seq);
145 err(udev, "seq-end needs seq-start parameter, ignoring\n");
146 fprintf(stderr, "seq-end needs seq-start parameter, ignoring\n");
151 while (!is_timeout) {
152 /* exit if queue is empty */
153 if (udev_queue_get_queue_is_empty(udev_queue))
156 /* if asked for, wait for a specific sequence of events */
158 unsigned long long seq;
162 for (seq = start; seq <= end; seq++) {
163 finished = udev_queue_get_seqnum_is_finished(udev_queue, seq);
170 usleep(1000 * 1000 / LOOP_PER_SECOND);
173 /* if we reached the timeout, print the list of remaining events */
175 struct udev_list_entry *list_entry;
178 info(udev, "timeout waiting for udev queue\n");
179 printf("\nudevadm settle - timeout of %i seconds reached, the event queue contains:\n", timeout);
180 udev_list_entry_foreach(list_entry, udev_queue_get_queued_list_entry(udev_queue))
182 udev_list_entry_get_name(list_entry),
183 udev_list_entry_get_value(list_entry));
188 udev_queue_unref(udev_queue);