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udevadm: support special value 'help' for --action option
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@ -228,7 +228,9 @@
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<para>Type of event to be triggered. Possible actions are <literal>add</literal>,
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<para>Type of event to be triggered. Possible actions are <literal>add</literal>,
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<literal>remove</literal>, <literal>change</literal>, <literal>move</literal>,
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<literal>remove</literal>, <literal>change</literal>, <literal>move</literal>,
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<literal>online</literal>, <literal>offline</literal>, <literal>bind</literal>,
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<literal>online</literal>, <literal>offline</literal>, <literal>bind</literal>,
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and <literal>unbind</literal>. The default value is <literal>change</literal>.</para>
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and <literal>unbind</literal>. Also, the special value <literal>help</literal> can be used
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to list the possible actions. The default value is <literal>change</literal>.
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</para>
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</listitem>
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</listitem>
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</varlistentry>
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</varlistentry>
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<varlistentry>
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<varlistentry>
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@ -524,9 +526,10 @@
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<variablelist>
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<variablelist>
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<varlistentry>
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<varlistentry>
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<term><option>-a</option></term>
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<term><option>-a</option></term>
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<term><option>--action=<replaceable>string</replaceable></option></term>
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<term><option>--action=<replaceable>ACTION</replaceable></option></term>
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<listitem>
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<listitem>
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<para>The action string.</para>
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<para>The action string. The special value <literal>help</literal> may be used to list
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known values.</para>
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</listitem>
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</listitem>
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</varlistentry>
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</varlistentry>
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<varlistentry>
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<varlistentry>
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@ -33,7 +33,7 @@ static int help(void) {
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"Test an event run.\n\n"
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"Test an event run.\n\n"
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" -h --help Show this help\n"
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" -h --help Show this help\n"
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" -V --version Show package version\n"
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" -V --version Show package version\n"
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" -a --action=ACTION Set action string\n"
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" -a --action=ACTION|help Set action string\n"
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" -N --resolve-names=early|late|never When to resolve names\n"
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" -N --resolve-names=early|late|never When to resolve names\n"
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, program_invocation_short_name);
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, program_invocation_short_name);
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@ -56,6 +56,11 @@ static int parse_argv(int argc, char *argv[]) {
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case 'a': {
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case 'a': {
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DeviceAction a;
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DeviceAction a;
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if (streq(optarg, "help")) {
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dump_device_action_table();
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return 0;
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}
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a = device_action_from_string(optarg);
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a = device_action_from_string(optarg);
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if (a < 0)
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if (a < 0)
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
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@ -115,7 +115,7 @@ static int help(void) {
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" -t --type= Type of events to trigger\n"
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" -t --type= Type of events to trigger\n"
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" devices sysfs devices (default)\n"
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" devices sysfs devices (default)\n"
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" subsystems sysfs subsystems and drivers\n"
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" subsystems sysfs subsystems and drivers\n"
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" -c --action=ACTION Event action value, default is \"change\"\n"
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" -c --action=ACTION|help Event action value, default is \"change\"\n"
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" -s --subsystem-match=SUBSYSTEM Trigger devices from a matching subsystem\n"
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" -s --subsystem-match=SUBSYSTEM Trigger devices from a matching subsystem\n"
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" -S --subsystem-nomatch=SUBSYSTEM Exclude devices from a matching subsystem\n"
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" -S --subsystem-nomatch=SUBSYSTEM Exclude devices from a matching subsystem\n"
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" -a --attr-match=FILE[=VALUE] Trigger devices with a matching attribute\n"
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" -a --attr-match=FILE[=VALUE] Trigger devices with a matching attribute\n"
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@ -205,6 +205,10 @@ int trigger_main(int argc, char *argv[], void *userdata) {
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown type --type=%s", optarg);
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown type --type=%s", optarg);
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break;
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break;
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case 'c':
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case 'c':
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if (streq(optarg, "help")) {
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dump_device_action_table();
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return 0;
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}
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if (device_action_from_string(optarg) < 0)
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if (device_action_from_string(optarg) < 0)
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown action '%s'", optarg);
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return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown action '%s'", optarg);
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