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Diffstat (limited to 'src/grp-udev/udevadm/udevadm-trigger.c')
-rw-r--r--src/grp-udev/udevadm/udevadm-trigger.c287
1 files changed, 287 insertions, 0 deletions
diff --git a/src/grp-udev/udevadm/udevadm-trigger.c b/src/grp-udev/udevadm/udevadm-trigger.c
new file mode 100644
index 0000000000..150b1e5a9a
--- /dev/null
+++ b/src/grp-udev/udevadm/udevadm-trigger.c
@@ -0,0 +1,287 @@
+/*
+ * 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/>.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "systemd-basic/string-util.h"
+#include "systemd-basic/util.h"
+#include "systemd-shared/udev-util.h"
+#include "udev.h"
+
+#include "udevadm-util.h"
+
+static int verbose;
+static int dry_run;
+
+static void exec_list(struct udev_enumerate *udev_enumerate, const char *action) {
+ struct udev_list_entry *entry;
+
+ udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(udev_enumerate)) {
+ char filename[UTIL_PATH_SIZE];
+ int fd;
+
+ if (verbose)
+ printf("%s\n", udev_list_entry_get_name(entry));
+ if (dry_run)
+ continue;
+ strscpyl(filename, sizeof(filename), udev_list_entry_get_name(entry), "/uevent", NULL);
+ fd = open(filename, O_WRONLY|O_CLOEXEC);
+ if (fd < 0)
+ continue;
+ if (write(fd, action, strlen(action)) < 0)
+ log_debug_errno(errno, "error writing '%s' to '%s': %m", action, filename);
+ close(fd);
+ }
+}
+
+static const char *keyval(const char *str, const char **val, char *buf, size_t size) {
+ char *pos;
+
+ strscpy(buf, size,str);
+ pos = strchr(buf, '=');
+ if (pos != NULL) {
+ pos[0] = 0;
+ pos++;
+ }
+ *val = pos;
+ return buf;
+}
+
+static void help(void) {
+ printf("%s trigger OPTIONS\n\n"
+ "Request events from the kernel.\n\n"
+ " -h --help Show this help\n"
+ " --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"
+ " devices sysfs devices (default)\n"
+ " subsystems sysfs subsystems and drivers\n"
+ " -c --action=ACTION Event action value, default is \"change\"\n"
+ " -s --subsystem-match=SUBSYSTEM Trigger devices from a matching subsystem\n"
+ " -S --subsystem-nomatch=SUBSYSTEM Exclude devices from a matching subsystem\n"
+ " -a --attr-match=FILE[=VALUE] Trigger devices with a matching attribute\n"
+ " -A --attr-nomatch=FILE[=VALUE] Exclude devices with a matching attribute\n"
+ " -p --property-match=KEY=VALUE Trigger devices with a matching property\n"
+ " -g --tag-match=KEY=VALUE Trigger devices with a matching property\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"
+ , program_invocation_short_name);
+}
+
+static int adm_trigger(struct udev *udev, int argc, char *argv[]) {
+ enum {
+ ARG_NAME = 0x100,
+ };
+
+ static const struct option options[] = {
+ { "verbose", no_argument, NULL, 'v' },
+ { "dry-run", no_argument, NULL, 'n' },
+ { "type", required_argument, NULL, 't' },
+ { "action", required_argument, NULL, 'c' },
+ { "subsystem-match", required_argument, NULL, 's' },
+ { "subsystem-nomatch", required_argument, NULL, 'S' },
+ { "attr-match", required_argument, NULL, 'a' },
+ { "attr-nomatch", required_argument, NULL, 'A' },
+ { "property-match", required_argument, NULL, 'p' },
+ { "tag-match", required_argument, NULL, 'g' },
+ { "sysname-match", required_argument, NULL, 'y' },
+ { "name-match", required_argument, NULL, ARG_NAME },
+ { "parent-match", required_argument, NULL, 'b' },
+ { "help", no_argument, NULL, 'h' },
+ {}
+ };
+ enum {
+ TYPE_DEVICES,
+ TYPE_SUBSYSTEMS,
+ } device_type = TYPE_DEVICES;
+ const char *action = "change";
+ _cleanup_udev_enumerate_unref_ struct udev_enumerate *udev_enumerate = NULL;
+ int c, r;
+
+ udev_enumerate = udev_enumerate_new(udev);
+ if (udev_enumerate == NULL)
+ return 1;
+
+ while ((c = getopt_long(argc, argv, "vno:t:c:s:S:a:A:p:g:y:b:h", options, NULL)) >= 0) {
+ const char *key;
+ const char *val;
+ char buf[UTIL_PATH_SIZE];
+
+ switch (c) {
+ case 'v':
+ verbose = 1;
+ break;
+ case 'n':
+ dry_run = 1;
+ break;
+ case 't':
+ if (streq(optarg, "devices"))
+ device_type = TYPE_DEVICES;
+ else if (streq(optarg, "subsystems"))
+ device_type = TYPE_SUBSYSTEMS;
+ else {
+ log_error("unknown type --type=%s", optarg);
+ return 2;
+ }
+ break;
+ case 'c':
+ if (!nulstr_contains("add\0" "remove\0" "change\0", optarg)) {
+ log_error("unknown action '%s'", optarg);
+ return 2;
+ } else
+ action = optarg;
+
+ break;
+ case 's':
+ r = udev_enumerate_add_match_subsystem(udev_enumerate, optarg);
+ if (r < 0) {
+ log_error_errno(r, "could not add subsystem match '%s': %m", optarg);
+ return 2;
+ }
+ break;
+ case 'S':
+ r = udev_enumerate_add_nomatch_subsystem(udev_enumerate, optarg);
+ if (r < 0) {
+ log_error_errno(r, "could not add negative subsystem match '%s': %m", optarg);
+ return 2;
+ }
+ break;
+ case 'a':
+ key = keyval(optarg, &val, buf, sizeof(buf));
+ r = udev_enumerate_add_match_sysattr(udev_enumerate, key, val);
+ if (r < 0) {
+ log_error_errno(r, "could not add sysattr match '%s=%s': %m", key, val);
+ return 2;
+ }
+ break;
+ case 'A':
+ key = keyval(optarg, &val, buf, sizeof(buf));
+ r = udev_enumerate_add_nomatch_sysattr(udev_enumerate, key, val);
+ if (r < 0) {
+ log_error_errno(r, "could not add negative sysattr match '%s=%s': %m", key, val);
+ return 2;
+ }
+ break;
+ case 'p':
+ key = keyval(optarg, &val, buf, sizeof(buf));
+ r = udev_enumerate_add_match_property(udev_enumerate, key, val);
+ if (r < 0) {
+ log_error_errno(r, "could not add property match '%s=%s': %m", key, val);
+ return 2;
+ }
+ break;
+ case 'g':
+ r = udev_enumerate_add_match_tag(udev_enumerate, optarg);
+ if (r < 0) {
+ log_error_errno(r, "could not add tag match '%s': %m", optarg);
+ return 2;
+ }
+ break;
+ case 'y':
+ r = udev_enumerate_add_match_sysname(udev_enumerate, optarg);
+ if (r < 0) {
+ log_error_errno(r, "could not add sysname match '%s': %m", optarg);
+ return 2;
+ }
+ break;
+ case 'b': {
+ _cleanup_udev_device_unref_ struct udev_device *dev;
+
+ dev = find_device(udev, optarg, "/sys");
+ if (dev == NULL) {
+ log_error("unable to open the device '%s'", optarg);
+ return 2;
+ }
+
+ r = udev_enumerate_add_match_parent(udev_enumerate, dev);
+ if (r < 0) {
+ log_error_errno(r, "could not add parent match '%s': %m", optarg);
+ return 2;
+ }
+ break;
+ }
+
+ case ARG_NAME: {
+ _cleanup_udev_device_unref_ struct udev_device *dev;
+
+ dev = find_device(udev, optarg, "/dev/");
+ if (dev == NULL) {
+ log_error("unable to open the device '%s'", optarg);
+ return 2;
+ }
+
+ r = udev_enumerate_add_match_parent(udev_enumerate, dev);
+ if (r < 0) {
+ log_error_errno(r, "could not add parent match '%s': %m", optarg);
+ return 2;
+ }
+ break;
+ }
+
+ case 'h':
+ help();
+ return 0;
+ case '?':
+ return 1;
+ default:
+ assert_not_reached("Unknown option");
+ }
+ }
+
+ for (; optind < argc; optind++) {
+ _cleanup_udev_device_unref_ struct udev_device *dev;
+
+ dev = find_device(udev, argv[optind], NULL);
+ if (dev == NULL) {
+ log_error("unable to open the device '%s'", argv[optind]);
+ return 2;
+ }
+
+ r = udev_enumerate_add_match_parent(udev_enumerate, dev);
+ if (r < 0) {
+ log_error_errno(r, "could not add tag match '%s': %m", optarg);
+ return 2;
+ }
+ }
+
+ switch (device_type) {
+ case TYPE_SUBSYSTEMS:
+ udev_enumerate_scan_subsystems(udev_enumerate);
+ exec_list(udev_enumerate, action);
+ return 0;
+ case TYPE_DEVICES:
+ udev_enumerate_scan_devices(udev_enumerate);
+ exec_list(udev_enumerate, action);
+ return 0;
+ default:
+ assert_not_reached("device_type");
+ }
+}
+
+const struct udevadm_cmd udevadm_trigger = {
+ .name = "trigger",
+ .cmd = adm_trigger,
+ .help = "Request events from the kernel",
+};
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