udevadm-settle.c revision 8249e04e3e9b6054768c3cd0ef72544831672b47
/*
* Copyright (C) 2006-2008 Kay Sievers <kay@vrfy.org>
*
* 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 <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <dirent.h>
#include <fcntl.h>
#include <syslog.h>
#include <getopt.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "udev.h"
#define DEFAULT_TIMEOUT 180
#define LOOP_PER_SECOND 20
int udevadm_settle(struct udev *udev, int argc, char *argv[])
{
static const struct option options[] = {
{ "timeout", 1, NULL, 't' },
{ "help", 0, NULL, 'h' },
{}
};
int timeout = DEFAULT_TIMEOUT;
struct udev_queue *udev_queue;
int loop;
int rc = 0;
dbg(udev, "version %s\n", VERSION);
while (1) {
int option;
int seconds;
option = getopt_long(argc, argv, "t:h", options, NULL);
if (option == -1)
break;
switch (option) {
case 't':
seconds = atoi(optarg);
if (seconds > 0)
timeout = seconds;
else
fprintf(stderr, "invalid timeout value\n");
dbg(udev, "timeout=%i\n", timeout);
break;
case 'h':
printf("Usage: udevadm settle [--help] [--timeout=<seconds>]\n\n");
goto exit;
}
}
udev_queue = udev_queue_new(udev);
if (udev_queue == NULL)
goto exit;
loop = timeout * LOOP_PER_SECOND;
while (loop--) {
if (udev_queue_get_queue_is_empty(udev_queue))
break;
usleep(1000 * 1000 / LOOP_PER_SECOND);
}
if (loop <= 0) {
struct udev_list_entry *list_entry;
info(udev, "timeout waiting for udev queue\n");
printf("\ndevadm settle timeout of %i seconds reached, the event queue contains:\n", timeout);
udev_list_entry_foreach(list_entry, udev_queue_get_queued_list_entry(udev_queue))
printf(" '%s' [%s]\n",
udev_list_entry_get_name(list_entry),
udev_list_entry_get_value(list_entry));
rc = 1;
}
exit:
udev_queue_unref(udev_queue);
return rc;
}