2 * Copyright (C) 2006 Kay Sievers <kay@vrfy.org>
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation version 2 of the License.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
30 #include <sys/types.h>
35 #define DEFAULT_TIMEOUT 180
36 #define LOOP_PER_SECOND 20
40 void log_message(int priority, const char *format, ...)
44 if (priority > udev_log_priority)
47 va_start(args, format);
48 vsyslog(priority, format, args);
53 int main(int argc, char *argv[], char *envp[])
55 char queuename[PATH_SIZE];
56 char filename[PATH_SIZE];
57 unsigned long long seq_kernel;
58 unsigned long long seq_udev;
62 int timeout = DEFAULT_TIMEOUT;
64 static const struct option options[] = {
65 { "timeout", 1, NULL, 't' },
66 { "help", 0, NULL, 'h' },
73 logging_init("udevsettle");
75 dbg("version %s", UDEV_VERSION);
79 option = getopt_long(argc, argv, "t:h", options, NULL);
85 seconds = atoi(optarg);
89 fprintf(stderr, "invalid timeout value\n");
90 dbg("timeout=%i", timeout);
93 printf("Usage: udevsettle [--help] [--timeout=<seconds>]\n\n");
98 strlcpy(queuename, udev_root, sizeof(queuename));
99 strlcat(queuename, "/" EVENT_QUEUE_DIR, sizeof(queuename));
101 loop = timeout * LOOP_PER_SECOND;
103 /* wait for events in queue to finish */
107 if (stat(queuename, &statbuf) < 0) {
108 info("queue is empty");
111 usleep(1000 * 1000 / LOOP_PER_SECOND);
114 info("timeout waiting for queue");
118 /* read current udev seqnum */
119 strlcpy(filename, udev_root, sizeof(filename));
120 strlcat(filename, "/" EVENT_SEQNUM, sizeof(filename));
121 fd = open(filename, O_RDONLY);
124 len = read(fd, seqnum, sizeof(seqnum)-1);
129 seq_udev = strtoull(seqnum, NULL, 10);
130 info("udev seqnum = %llu", seq_udev);
132 /* read current kernel seqnum */
133 strlcpy(filename, sysfs_path, sizeof(filename));
134 strlcat(filename, "/kernel/uevent_seqnum", sizeof(filename));
135 fd = open(filename, O_RDONLY);
138 len = read(fd, seqnum, sizeof(seqnum)-1);
143 seq_kernel = strtoull(seqnum, NULL, 10);
144 info("kernel seqnum = %llu", seq_kernel);
146 /* make sure all kernel events have arrived in the queue */
147 if (seq_udev >= seq_kernel) {
148 info("queue is empty and no pending events left");
152 usleep(1000 * 1000 / LOOP_PER_SECOND);
153 info("queue is empty, but events still pending");