-/*
- * Copyright (C) 2008-2009 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/>.
- */
+/* SPDX-License-Identifier: GPL-2.0+ */
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
#include <stddef.h>
-#include <string.h>
#include <stdio.h>
+#include <string.h>
#include <unistd.h>
-#include <getopt.h>
-#include <errno.h>
-#include <fcntl.h>
+#include "fd-util.h"
+#include "set.h"
+#include "string-util.h"
#include "udev.h"
-#include "udev-util.h"
#include "udevadm-util.h"
#include "util.h"
static int verbose;
static int dry_run;
-static void exec_list(struct udev_enumerate *udev_enumerate, const char *action) {
+static int exec_list(struct udev_enumerate *udev_enumerate, const char *action, Set *settle_set) {
struct udev_list_entry *entry;
+ int r;
udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(udev_enumerate)) {
char filename[UTIL_PATH_SIZE];
- int fd;
+ const char *syspath;
+ _cleanup_close_ int fd = -1;
+ syspath = udev_list_entry_get_name(entry);
if (verbose)
- printf("%s\n", udev_list_entry_get_name(entry));
+ printf("%s\n", syspath);
if (dry_run)
continue;
- strscpyl(filename, sizeof(filename), udev_list_entry_get_name(entry), "/uevent", NULL);
+
+ strscpyl(filename, sizeof(filename), syspath, "/uevent", NULL);
fd = open(filename, O_WRONLY|O_CLOEXEC);
if (fd < 0)
continue;
+
+ if (settle_set) {
+ r = set_put_strdup(settle_set, syspath);
+ if (r < 0)
+ return log_oom();
+ }
+
if (write(fd, action, strlen(action)) < 0)
log_debug_errno(errno, "error writing '%s' to '%s': %m", action, filename);
- close(fd);
}
+
+ return 0;
}
static const char *keyval(const char *str, const char **val, char *buf, size_t size) {
}
static void help(void) {
- printf("%s trigger OPTIONS\n\n"
+ printf("%s trigger [OPTIONS] DEVPATH\n\n"
"Request events from the kernel.\n\n"
" -h --help Show this help\n"
- " --version Show package version\n"
+ " -V --version Show package version\n"
" -v --verbose Print the list of devices while running\n"
" -n --dry-run Do not actually trigger the events\n"
" -t --type= Type of events to trigger\n"
" -y --sysname-match=NAME Trigger devices with this /sys path\n"
" --name-match=NAME Trigger devices with this /dev name\n"
" -b --parent-match=NAME Trigger devices with that parent device\n"
+ " -w --settle Wait for the triggered events to complete\n"
, program_invocation_short_name);
}
{ "sysname-match", required_argument, NULL, 'y' },
{ "name-match", required_argument, NULL, ARG_NAME },
{ "parent-match", required_argument, NULL, 'b' },
+ { "settle", no_argument, NULL, 'w' },
+ { "version", no_argument, NULL, 'V' },
{ "help", no_argument, NULL, 'h' },
{}
};
TYPE_SUBSYSTEMS,
} device_type = TYPE_DEVICES;
const char *action = "change";
- _cleanup_udev_enumerate_unref_ struct udev_enumerate *udev_enumerate = NULL;
+ _cleanup_(udev_enumerate_unrefp) struct udev_enumerate *udev_enumerate = NULL;
+ _cleanup_(udev_monitor_unrefp) struct udev_monitor *udev_monitor = NULL;
+ _cleanup_close_ int fd_ep = -1;
+ int fd_udev = -1;
+ struct epoll_event ep_udev;
+ bool settle = false;
+ _cleanup_set_free_free_ Set *settle_set = NULL;
int c, r;
udev_enumerate = udev_enumerate_new(udev);
- if (udev_enumerate == NULL)
+ if (!udev_enumerate)
return 1;
- while ((c = getopt_long(argc, argv, "vno:t:c:s:S:a:A:p:g:y:b:h", options, NULL)) >= 0) {
+ while ((c = getopt_long(argc, argv, "vnt:c:s:S:a:A:p:g:y:b:wVh", options, NULL)) >= 0) {
const char *key;
const char *val;
char buf[UTIL_PATH_SIZE];
}
break;
case 'c':
- if (!nulstr_contains("add\0" "remove\0" "change\0", optarg)) {
+ if (!STR_IN_SET(optarg, "add", "remove", "change")) {
log_error("unknown action '%s'", optarg);
return 2;
} else
}
break;
case 'b': {
- _cleanup_udev_device_unref_ struct udev_device *dev;
+ _cleanup_(udev_device_unrefp) struct udev_device *dev;
dev = find_device(udev, optarg, "/sys");
- if (dev == NULL) {
+ if (!dev) {
log_error("unable to open the device '%s'", optarg);
return 2;
}
}
break;
}
+ case 'w':
+ settle = true;
+ break;
case ARG_NAME: {
- _cleanup_udev_device_unref_ struct udev_device *dev;
+ _cleanup_(udev_device_unrefp) struct udev_device *dev;
dev = find_device(udev, optarg, "/dev/");
- if (dev == NULL) {
+ if (!dev) {
log_error("unable to open the device '%s'", optarg);
return 2;
}
break;
}
+ case 'V':
+ print_version();
+ return 0;
case 'h':
help();
return 0;
}
for (; optind < argc; optind++) {
- _cleanup_udev_device_unref_ struct udev_device *dev;
+ _cleanup_(udev_device_unrefp) struct udev_device *dev;
dev = find_device(udev, argv[optind], NULL);
- if (dev == NULL) {
+ if (!dev) {
log_error("unable to open the device '%s'", argv[optind]);
return 2;
}
}
}
+ if (settle) {
+ fd_ep = epoll_create1(EPOLL_CLOEXEC);
+ if (fd_ep < 0) {
+ log_error_errno(errno, "error creating epoll fd: %m");
+ return 1;
+ }
+
+ udev_monitor = udev_monitor_new_from_netlink(udev, "udev");
+ if (!udev_monitor) {
+ log_error("error: unable to create netlink socket");
+ return 3;
+ }
+ fd_udev = udev_monitor_get_fd(udev_monitor);
+
+ if (udev_monitor_enable_receiving(udev_monitor) < 0) {
+ log_error("error: unable to subscribe to udev events");
+ return 4;
+ }
+
+ ep_udev = (struct epoll_event) { .events = EPOLLIN, .data.fd = fd_udev };
+ if (epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_udev, &ep_udev) < 0) {
+ log_error_errno(errno, "fail to add fd to epoll: %m");
+ return 5;
+ }
+
+ settle_set = set_new(&string_hash_ops);
+ if (!settle_set) {
+ log_oom();
+ return 1;
+ }
+ }
+
switch (device_type) {
case TYPE_SUBSYSTEMS:
udev_enumerate_scan_subsystems(udev_enumerate);
- exec_list(udev_enumerate, action);
- return 0;
+ break;
case TYPE_DEVICES:
udev_enumerate_scan_devices(udev_enumerate);
- exec_list(udev_enumerate, action);
- return 0;
+ break;
default:
assert_not_reached("device_type");
}
+ r = exec_list(udev_enumerate, action, settle_set);
+ if (r < 0)
+ return 1;
+
+ while (!set_isempty(settle_set)) {
+ int fdcount;
+ struct epoll_event ev[4];
+ int i;
+
+ fdcount = epoll_wait(fd_ep, ev, ELEMENTSOF(ev), -1);
+ if (fdcount < 0) {
+ if (errno != EINTR)
+ log_error_errno(errno, "error receiving uevent message: %m");
+ continue;
+ }
+
+ for (i = 0; i < fdcount; i++) {
+ if (ev[i].data.fd == fd_udev && ev[i].events & EPOLLIN) {
+ _cleanup_(udev_device_unrefp) struct udev_device *device;
+ const char *syspath = NULL;
+
+ device = udev_monitor_receive_device(udev_monitor);
+ if (!device)
+ continue;
+
+ syspath = udev_device_get_syspath(device);
+ if (verbose)
+ printf("settle %s\n", syspath);
+ if (!set_remove(settle_set, syspath))
+ log_debug("Got epoll event on syspath %s not present in syspath set", syspath);
+ }
+ }
+ }
+
+ return 0;
}
const struct udevadm_cmd udevadm_trigger = {
projects / thirdparty / systemd.git / blobdiff