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-rw-r--r--src/udev/udevadm-trigger.c228
1 files changed, 228 insertions, 0 deletions
diff --git a/src/udev/udevadm-trigger.c b/src/udev/udevadm-trigger.c
new file mode 100644
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--- /dev/null
+++ b/src/udev/udevadm-trigger.c
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+/*
+ * 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 <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <errno.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <syslog.h>
+#include <fnmatch.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+
+#include "udev.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;
+ util_strscpyl(filename, sizeof(filename), udev_list_entry_get_name(entry), "/uevent", NULL);
+ fd = open(filename, O_WRONLY);
+ if (fd < 0)
+ continue;
+ if (write(fd, action, strlen(action)) < 0)
+ log_debug("error writing '%s' to '%s': %m\n", action, filename);
+ close(fd);
+ }
+}
+
+static const char *keyval(const char *str, const char **val, char *buf, size_t size)
+{
+ char *pos;
+
+ util_strscpy(buf, size,str);
+ pos = strchr(buf, '=');
+ if (pos != NULL) {
+ pos[0] = 0;
+ pos++;
+ }
+ *val = pos;
+ return buf;
+}
+
+static int adm_trigger(struct udev *udev, int argc, char *argv[])
+{
+ 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' },
+ { "parent-match", required_argument, NULL, 'b' },
+ { "help", no_argument, NULL, 'h' },
+ {}
+ };
+ enum {
+ TYPE_DEVICES,
+ TYPE_SUBSYSTEMS,
+ } device_type = TYPE_DEVICES;
+ const char *action = "change";
+ struct udev_enumerate *udev_enumerate;
+ int rc = 0;
+
+ udev_enumerate = udev_enumerate_new(udev);
+ if (udev_enumerate == NULL) {
+ rc = 1;
+ goto exit;
+ }
+
+ for (;;) {
+ int option;
+ const char *key;
+ const char *val;
+ char buf[UTIL_PATH_SIZE];
+
+ option = getopt_long(argc, argv, "vng:o:t:hc:p:s:S:a:A:y:b:", options, NULL);
+ if (option == -1)
+ break;
+
+ switch (option) {
+ case 'v':
+ verbose = 1;
+ break;
+ case 'n':
+ dry_run = 1;
+ break;
+ case 't':
+ if (strcmp(optarg, "devices") == 0) {
+ device_type = TYPE_DEVICES;
+ } else if (strcmp(optarg, "subsystems") == 0) {
+ device_type = TYPE_SUBSYSTEMS;
+ } else {
+ log_error("unknown type --type=%s\n", optarg);
+ rc = 2;
+ goto exit;
+ }
+ break;
+ case 'c':
+ action = optarg;
+ break;
+ case 's':
+ udev_enumerate_add_match_subsystem(udev_enumerate, optarg);
+ break;
+ case 'S':
+ udev_enumerate_add_nomatch_subsystem(udev_enumerate, optarg);
+ break;
+ case 'a':
+ key = keyval(optarg, &val, buf, sizeof(buf));
+ udev_enumerate_add_match_sysattr(udev_enumerate, key, val);
+ break;
+ case 'A':
+ key = keyval(optarg, &val, buf, sizeof(buf));
+ udev_enumerate_add_nomatch_sysattr(udev_enumerate, key, val);
+ break;
+ case 'p':
+ key = keyval(optarg, &val, buf, sizeof(buf));
+ udev_enumerate_add_match_property(udev_enumerate, key, val);
+ break;
+ case 'g':
+ udev_enumerate_add_match_tag(udev_enumerate, optarg);
+ break;
+ case 'y':
+ udev_enumerate_add_match_sysname(udev_enumerate, optarg);
+ break;
+ case 'b': {
+ char path[UTIL_PATH_SIZE];
+ struct udev_device *dev;
+
+ /* add sys dir if needed */
+ if (!startswith(optarg, "/sys"))
+ util_strscpyl(path, sizeof(path), "/sys", optarg, NULL);
+ else
+ util_strscpy(path, sizeof(path), optarg);
+ util_remove_trailing_chars(path, '/');
+ dev = udev_device_new_from_syspath(udev, path);
+ if (dev == NULL) {
+ log_error("unable to open the device '%s'\n", optarg);
+ rc = 2;
+ goto exit;
+ }
+ udev_enumerate_add_match_parent(udev_enumerate, dev);
+ /* drop reference immediately, enumerate pins the device as long as needed */
+ udev_device_unref(dev);
+ break;
+ }
+ case 'h':
+ printf("Usage: udevadm trigger OPTIONS\n"
+ " --verbose print the list of devices while running\n"
+ " --dry-run do not actually trigger the events\n"
+ " --type= type of events to trigger\n"
+ " devices sys devices (default)\n"
+ " subsystems sys subsystems and drivers\n"
+ " --action=<action> event action value, default is \"change\"\n"
+ " --subsystem-match=<subsystem> trigger devices from a matching subsystem\n"
+ " --subsystem-nomatch=<subsystem> exclude devices from a matching subsystem\n"
+ " --attr-match=<file[=<value>]> trigger devices with a matching attribute\n"
+ " --attr-nomatch=<file[=<value>]> exclude devices with a matching attribute\n"
+ " --property-match=<key>=<value> trigger devices with a matching property\n"
+ " --tag-match=<key>=<value> trigger devices with a matching property\n"
+ " --sysname-match=<name> trigger devices with a matching name\n"
+ " --parent-match=<name> trigger devices with that parent device\n"
+ " --help\n\n");
+ goto exit;
+ default:
+ rc = 1;
+ goto exit;
+ }
+ }
+
+ switch (device_type) {
+ case TYPE_SUBSYSTEMS:
+ udev_enumerate_scan_subsystems(udev_enumerate);
+ exec_list(udev_enumerate, action);
+ goto exit;
+ case TYPE_DEVICES:
+ udev_enumerate_scan_devices(udev_enumerate);
+ exec_list(udev_enumerate, action);
+ goto exit;
+ default:
+ goto exit;
+ }
+exit:
+ udev_enumerate_unref(udev_enumerate);
+ return rc;
+}
+
+const struct udevadm_cmd udevadm_trigger = {
+ .name = "trigger",
+ .cmd = adm_trigger,
+ .help = "request events from the kernel",
+};
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