+++ /dev/null
-/*
- * Copyright (C) 2006-2009 Kay Sievers <kay@vrfy.org>
- * Copyright (C) 2009 Canonical Ltd.
- * Copyright (C) 2009 Scott James Remnant <scott@netsplit.com>
- *
- * 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 <signal.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-
-#include "udev.h"
-
-#define DEFAULT_TIMEOUT 180
-#define LOOP_PER_SECOND 20
-
-static volatile sig_atomic_t is_timeout;
-
-static void sig_handler(int signum)
-{
- switch (signum) {
- case SIGALRM:
- is_timeout = 1;
- case SIGUSR1:
- ;
- }
-}
-
-int udevadm_settle(struct udev *udev, int argc, char *argv[])
-{
- static const struct option options[] = {
- { "seq-start", required_argument, NULL, 's' },
- { "seq-end", required_argument, NULL, 'e' },
- { "timeout", required_argument, NULL, 't' },
- { "exit-if-exists", required_argument, NULL, 'E' },
- { "quiet", no_argument, NULL, 'q' },
- { "help", no_argument, NULL, 'h' },
- {}
- };
- unsigned long long start = 0;
- unsigned long long end = 0;
- int quiet = 0;
- const char *exists = NULL;
- int timeout = DEFAULT_TIMEOUT;
- struct sigaction act;
- struct udev_queue *udev_queue = NULL;
- int rc = 1;
-
- dbg(udev, "version %s\n", VERSION);
-
- /* set signal handlers */
- memset(&act, 0x00, sizeof(act));
- act.sa_handler = sig_handler;
- sigemptyset (&act.sa_mask);
- act.sa_flags = 0;
- sigaction(SIGALRM, &act, NULL);
- sigaction(SIGUSR1, &act, NULL);
-
- while (1) {
- int option;
- int seconds;
-
- option = getopt_long(argc, argv, "s:e:t:E:qh", options, NULL);
- if (option == -1)
- break;
-
- switch (option) {
- case 's':
- start = strtoull(optarg, NULL, 0);
- break;
- case 'e':
- end = strtoull(optarg, NULL, 0);
- break;
- 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 'q':
- quiet = 1;
- break;
- case 'E':
- exists = optarg;
- break;
- case 'h':
- printf("Usage: udevadm settle OPTIONS\n"
- " --timeout=<seconds> maximum time to wait for events\n"
- " --seq-start=<seqnum> first seqnum to wait for\n"
- " --seq-end=<seqnum> last seqnum to wait for\n"
- " --exit-if-exists=<file> stop waiting if file exists\n"
- " --quiet do not print list after timeout\n"
- " --help\n\n");
- exit(0);
- }
- }
-
- if (timeout > 0)
- alarm(timeout);
- else
- is_timeout = 1;
-
- udev_queue = udev_queue_new(udev);
- if (udev_queue == NULL)
- exit(2);
-
- if (start > 0) {
- unsigned long long kernel_seq;
-
- kernel_seq = udev_queue_get_kernel_seqnum(udev_queue);
-
- /* unless specified, the last event is the current kernel seqnum */
- if (end == 0)
- end = udev_queue_get_kernel_seqnum(udev_queue);
-
- if (start > end) {
- err(udev, "seq-start larger than seq-end, ignoring\n");
- fprintf(stderr, "seq-start larger than seq-end, ignoring\n");
- start = 0;
- end = 0;
- }
-
- if (start > kernel_seq || end > kernel_seq) {
- err(udev, "seq-start or seq-end larger than current kernel value, ignoring\n");
- fprintf(stderr, "seq-start or seq-end larger than current kernel value, ignoring\n");
- start = 0;
- end = 0;
- }
- info(udev, "start=%llu end=%llu current=%llu\n", start, end, kernel_seq);
- } else {
- if (end > 0) {
- err(udev, "seq-end needs seq-start parameter, ignoring\n");
- fprintf(stderr, "seq-end needs seq-start parameter, ignoring\n");
- end = 0;
- }
- }
-
- /* guarantee that the udev daemon isn't pre-processing */
- if (getuid() == 0) {
- struct udev_ctrl *uctrl;
-
- uctrl = udev_ctrl_new_from_socket(udev, UDEV_CTRL_SOCK_PATH);
- if (uctrl != NULL) {
- sigset_t mask, oldmask;
-
- sigemptyset(&mask);
- sigaddset(&mask, SIGUSR1);
- sigaddset(&mask, SIGALRM);
- sigprocmask(SIG_BLOCK, &mask, &oldmask);
- if (udev_ctrl_send_settle(uctrl) > 0)
- sigsuspend(&oldmask);
- sigprocmask(SIG_SETMASK, &oldmask, NULL);
- udev_ctrl_unref(uctrl);
- }
- }
-
- while (1) {
- struct stat statbuf;
-
- if (exists != NULL && stat(exists, &statbuf) == 0) {
- rc = 0;
- break;
- }
-
- if (start > 0) {
- /* if asked for, wait for a specific sequence of events */
- if (udev_queue_get_seqnum_sequence_is_finished(udev_queue, start, end) == 1) {
- rc = 0;
- break;
- }
- } else {
- /* exit if queue is empty */
- if (udev_queue_get_queue_is_empty(udev_queue)) {
- rc = 0;
- break;
- }
- }
-
- if (is_timeout)
- break;
-
- usleep(1000 * 1000 / LOOP_PER_SECOND);
- }
-
- /* if we reached the timeout, print the list of remaining events */
- if (is_timeout) {
- struct udev_list_entry *list_entry;
-
- if (!quiet && udev_queue_get_queued_list_entry(udev_queue) != NULL) {
- info(udev, "timeout waiting for udev queue\n");
- printf("\nudevadm 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));
- }
- }
-
- udev_queue_unref(udev_queue);
- return rc;
-}
~ianmdlvl / elogind.git / blobdiff