4 * Copyright (C) 2006 Kay Sievers <kay@vrfy.org>
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation version 2 of the License.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 675 Mass Ave, Cambridge, MA 02139, USA.
31 #include <sys/types.h>
36 #define DEFAULT_TIMEOUT 180
37 #define LOOP_PER_SECOND 20
39 static const char *udev_log_str;
42 void log_message(int priority, const char *format, ...)
46 if (priority > udev_log_priority)
49 va_start(args, format);
50 vsyslog(priority, format, args);
55 int main(int argc, char *argv[], char *envp[])
57 char queuename[PATH_SIZE];
58 char filename[PATH_SIZE];
59 unsigned long long seq_kernel;
60 unsigned long long seq_udev;
64 int timeout = DEFAULT_TIMEOUT;
69 logging_init("udevsettle");
71 dbg("version %s", UDEV_VERSION);
73 udev_log_str = getenv("UDEV_LOG");
75 for (i = 1 ; i < argc; i++) {
78 if (strncmp(arg, "--timeout=", 10) == 0) {
82 dbg("timeout=%i", timeout);
84 fprintf(stderr, "Invalid timeout value.\n");
88 fprintf(stderr, "Usage: udevsettle [--timeout=<seconds>]\n");
94 strlcpy(queuename, udev_root, sizeof(queuename));
95 strlcat(queuename, "/" EVENT_QUEUE_DIR, sizeof(queuename));
97 loop = timeout * LOOP_PER_SECOND;
99 /* wait for events in queue to finish */
103 if (stat(queuename, &statbuf) < 0) {
104 info("queue is empty");
107 usleep(1000 * 1000 / LOOP_PER_SECOND);
110 info("timeout waiting for queue");
114 /* read current kernel seqnum */
115 strlcpy(filename, sysfs_path, sizeof(filename));
116 strlcat(filename, "/kernel/uevent_seqnum", sizeof(filename));
117 fd = open(filename, O_RDONLY);
120 len = read(fd, seqnum, sizeof(seqnum)-1);
125 seq_kernel = strtoull(seqnum, NULL, 10);
126 info("kernel seqnum = %llu", seq_kernel);
128 /* read current udev seqnum */
129 strlcpy(filename, udev_root, sizeof(filename));
130 strlcat(filename, "/" EVENT_SEQNUM, sizeof(filename));
131 fd = open(filename, O_RDONLY);
134 len = read(fd, seqnum, sizeof(seqnum)-1);
139 seq_udev = strtoull(seqnum, NULL, 10);
140 info("udev seqnum = %llu", seq_udev);
142 /* make sure all kernel events have arrived in the queue */
143 if (seq_udev >= seq_kernel) {
144 info("queue is empty and no pending events left");
148 usleep(1000 * 1000 / LOOP_PER_SECOND);
149 info("queue is empty, but events still pending");