+/* SPDX-License-Identifier: GPL-2.0+ */
/*
- * 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/>.
+ * Copyright © 2009 Canonical Ltd.
+ * Copyright © 2009 Scott James Remnant <scott@netsplit.com>
*/
-#include <stdlib.h>
-#include <stddef.h>
-#include <string.h>
-#include <stdio.h>
-#include <unistd.h>
#include <errno.h>
#include <getopt.h>
#include <poll.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
-#include "parse-util.h"
-#include "udev.h"
+#include "libudev-util.h"
+#include "time-util.h"
+#include "udevadm.h"
+#include "udev-ctrl.h"
#include "util.h"
-static void help(void) {
- printf("%s settle OPTIONS\n\n"
+static usec_t arg_timeout = 120 * USEC_PER_SEC;
+static const char *arg_exists = NULL;
+
+static int help(void) {
+ printf("%s settle [OPTIONS]\n\n"
"Wait for pending udev events.\n\n"
" -h --help Show this help\n"
- " --version Show package version\n"
- " -t --timeout=SECONDS Maximum time to wait for events\n"
+ " -V --version Show package version\n"
+ " -t --timeout=SEC Maximum time to wait for events\n"
" -E --exit-if-exists=FILE Stop waiting if file exists\n"
, program_invocation_short_name);
+
+ return 0;
}
-static int adm_settle(struct udev *udev, int argc, char *argv[]) {
+static int parse_argv(int argc, char *argv[]) {
static const struct option options[] = {
{ "timeout", required_argument, NULL, 't' },
{ "exit-if-exists", required_argument, NULL, 'E' },
+ { "version", no_argument, NULL, 'V' },
{ "help", no_argument, NULL, 'h' },
{ "seq-start", required_argument, NULL, 's' }, /* removed */
{ "seq-end", required_argument, NULL, 'e' }, /* removed */
{ "quiet", no_argument, NULL, 'q' }, /* removed */
{}
};
- usec_t deadline;
- const char *exists = NULL;
- unsigned int timeout = 120;
- struct pollfd pfd[1] = { {.fd = -1}, };
- int c;
- struct udev_queue *queue;
- int rc = EXIT_FAILURE;
-
- while ((c = getopt_long(argc, argv, "t:E:hs:e:q", options, NULL)) >= 0) {
- switch (c) {
- case 't': {
- int r;
+ int c, r;
- r = safe_atou(optarg, &timeout);
- if (r < 0) {
- log_error_errno(r, "Invalid timeout value '%s': %m", optarg);
- return EXIT_FAILURE;
- }
+ while ((c = getopt_long(argc, argv, "t:E:Vhs:e:q", options, NULL)) >= 0) {
+ switch (c) {
+ case 't':
+ r = parse_sec(optarg, &arg_timeout);
+ if (r < 0)
+ return log_error_errno(r, "Failed to parse timeout value '%s': %m", optarg);
break;
- }
-
case 'E':
- exists = optarg;
+ arg_exists = optarg;
break;
-
+ case 'V':
+ return print_version();
case 'h':
- help();
- return EXIT_SUCCESS;
-
+ return help();
case 's':
case 'e':
case 'q':
- log_info("Option -%c no longer supported.", c);
- return EXIT_FAILURE;
-
+ return log_info_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Option -%c no longer supported.",
+ c);
case '?':
- return EXIT_FAILURE;
-
+ return -EINVAL;
default:
- assert_not_reached("Unknown argument");
+ assert_not_reached("Unknown option.");
}
}
- if (optind < argc) {
- fprintf(stderr, "Extraneous argument: '%s'\n", argv[optind]);
- return EXIT_FAILURE;
- }
+ return 1;
+}
+
+int settle_main(int argc, char *argv[], void *userdata) {
+ _cleanup_(udev_queue_unrefp) struct udev_queue *queue = NULL;
+ struct pollfd pfd;
+ usec_t deadline;
+ int r;
+
+ r = parse_argv(argc, argv);
+ if (r <= 0)
+ return r;
- deadline = now(CLOCK_MONOTONIC) + timeout * USEC_PER_SEC;
+ deadline = now(CLOCK_MONOTONIC) + arg_timeout;
/* guarantee that the udev daemon isn't pre-processing */
if (getuid() == 0) {
- struct udev_ctrl *uctrl;
-
- uctrl = udev_ctrl_new(udev);
- if (uctrl != NULL) {
- if (udev_ctrl_send_ping(uctrl, MAX(5U, timeout)) < 0) {
- log_debug("no connection to daemon");
- udev_ctrl_unref(uctrl);
- return EXIT_SUCCESS;
+ _cleanup_(udev_ctrl_unrefp) struct udev_ctrl *uctrl = NULL;
+
+ uctrl = udev_ctrl_new();
+ if (uctrl) {
+ r = udev_ctrl_send_ping(uctrl, MAX(5U, arg_timeout / USEC_PER_SEC));
+ if (r < 0) {
+ log_debug_errno(r, "Failed to connect to udev daemon.");
+ return 0;
}
- udev_ctrl_unref(uctrl);
}
}
- queue = udev_queue_new(udev);
- if (!queue) {
- log_error("unable to get udev queue");
- return EXIT_FAILURE;
- }
+ queue = udev_queue_new(NULL);
+ if (!queue)
+ return log_error_errno(errno, "Failed to get udev queue: %m");
- pfd[0].events = POLLIN;
- pfd[0].fd = udev_queue_get_fd(queue);
- if (pfd[0].fd < 0) {
- log_debug("queue is empty, nothing to watch");
- rc = EXIT_SUCCESS;
- goto out;
+ r = udev_queue_get_fd(queue);
+ if (r < 0) {
+ log_debug_errno(r, "Queue is empty, nothing to watch.");
+ return 0;
}
+ pfd = (struct pollfd) {
+ .events = POLLIN,
+ .fd = r,
+ };
+
for (;;) {
- if (exists && access(exists, F_OK) >= 0) {
- rc = EXIT_SUCCESS;
- break;
- }
+ if (arg_exists && access(arg_exists, F_OK) >= 0)
+ return 0;
/* exit if queue is empty */
- if (udev_queue_get_queue_is_empty(queue)) {
- rc = EXIT_SUCCESS;
- break;
- }
+ if (udev_queue_get_queue_is_empty(queue))
+ return 0;
if (now(CLOCK_MONOTONIC) >= deadline)
- break;
+ return -ETIMEDOUT;
- /* wake up when queue is empty */
- if (poll(pfd, 1, MSEC_PER_SEC) > 0 && pfd[0].revents & POLLIN)
- udev_queue_flush(queue);
+ /* wake up when queue becomes empty */
+ if (poll(&pfd, 1, MSEC_PER_SEC) > 0 && pfd.revents & POLLIN) {
+ r = udev_queue_flush(queue);
+ if (r < 0)
+ return log_error_errno(r, "Failed to flush queue: %m");
+ }
}
-
-out:
- udev_queue_unref(queue);
- return rc;
}
-
-const struct udevadm_cmd udevadm_settle = {
- .name = "settle",
- .cmd = adm_settle,
- .help = "Wait for pending udev events",
-};
projects / thirdparty / systemd.git / blobdiff