utils: show help blurb when run without any arguments

[elogind.git] / src / systemctl.c

diff --git a/src/systemctl.c b/src/systemctl.c
index 18b32bcf2fb454f70f160a9da1879af8c071157d..78310aa273859a988e2bfc6bc70f1d0d70898672 100644 (file)
--- a/src/systemctl.c
+++ b/src/systemctl.c
@@ -1428,8 +1428,8 @@ finish:
 
 static int systemctl_help(void) {
 
-        printf("%s [options]\n\n"
-               "Send control commands to the init daemon.\n\n"
+        printf("%s [OPTIONS...] {COMMAND} ...\n\n"
+               "Send control commands to the systemd manager.\n\n"
                "  -h --help      Show this help\n"
                "  -t --type=TYPE List only units of a particular type\n"
                "  -a --all       Show all units, including dead ones\n"
@@ -1437,7 +1437,7 @@ static int systemctl_help(void) {
                "     --system    Connect to system bus\n"
                "     --session   Connect to session bus\n"
                "     --block     Wait until operation finished\n"
-               "     --no-wall   Don't send wall message before reboot/halt/power-off\n\n"
+               "     --no-wall   Don't send wall message before halt/power-off/reboot\n\n"
                "Commands:\n"
                "  list-units                      List units\n"
                "  list-jobs                       List jobs\n"
@@ -1452,15 +1452,15 @@ static int systemctl_help(void) {
                "  monitor                         Monitor unit/job changes\n"
                "  dump                            Dump server status\n"
                "  snapshot [NAME]                 Create a snapshot\n"
-               "  daemon-reload                   Reload init daemon configuration\n"
-               "  daemon-reexecute                Reexecute init daemon\n"
-               "  daemon-exit                     Ask the init daemon to quit\n"
+               "  daemon-reload                   Reload systemd manager configuration\n"
+               "  daemon-reexec                   Reexecute systemd manager\n"
+               "  daemon-exit                     Ask the systemd manager to quit\n"
                "  show-environment                Dump environment\n"
                "  set-environment [NAME=VALUE...] Set one or more environment variables\n"
                "  unset-environment [NAME...]     Unset one or more environment variables\n"
                "  halt                            Shut down and halt the system\n"
+               "  poweroff                        Shut down and power-off the system\n"
                "  reboot                          Shut down and reboot the system\n"
-               "  poweroff                        Shut down and power off the system\n"
                "  default                         Enter default mode\n"
                "  rescue                          Enter rescue mode\n"
                "  emergency                       Enter emergency mode\n",
@@ -1471,17 +1471,17 @@ static int systemctl_help(void) {
 
 static int halt_help(void) {
 
-        printf("%s [options]\n\n"
+        printf("%s [OPTIONS...]\n\n"
                "%s the system.\n\n"
                "     --help      Show this help\n"
                "     --halt      Halt the machine\n"
                "  -p --poweroff  Switch off the machine\n"
                "     --reboot    Reboot the machine\n"
-               "  -f --force     Force immediate reboot/halt/power-off\n"
-               "  -w --wtmp-only Don't reboot/halt/power-off, just write wtmp record\n"
+               "  -f --force     Force immediate halt/power-off/reboot\n"
+               "  -w --wtmp-only Don't halt/power-off/reboot, just write wtmp record\n"
                "  -d --no-wtmp   Don't write wtmp record\n"
-               "  -n --no-sync   Don't sync before reboot/halt/power-off\n"
-               "     --no-wall   Don't send wall message before reboot/halt/power-off\n",
+               "  -n --no-sync   Don't sync before halt/power-off/reboot\n"
+               "     --no-wall   Don't send wall message before halt/power-off/reboot\n",
                program_invocation_short_name,
                arg_action == ACTION_REBOOT   ? "Reboot" :
                arg_action == ACTION_POWEROFF ? "Power off" :
@@ -1492,15 +1492,15 @@ static int halt_help(void) {
 
 static int shutdown_help(void) {
 
-        printf("%s [options] [now] [WALL...]\n\n"
+        printf("%s [OPTIONS...] [now] [WALL...]\n\n"
                "Shut down the system.\n\n"
                "     --help      Show this help\n"
                "  -H --halt      Halt the machine\n"
                "  -P --poweroff  Power-off the machine\n"
                "  -r --reboot    Reboot the machine\n"
                "  -h             Equivalent to --poweroff, overriden by --halt\n"
-               "  -k             Don't reboot/halt/power-off, just send warnings\n"
-               "     --no-wall   Don't send wall message before reboot/halt/power-off\n",
+               "  -k             Don't halt/power-off/reboot, just send warnings\n"
+               "     --no-wall   Don't send wall message before halt/power-off/reboot\n",
                program_invocation_short_name);
 
         return 0;
@@ -1508,10 +1508,10 @@ static int shutdown_help(void) {
 
 static int telinit_help(void) {
 
-        printf("%s [options]\n\n"
+        printf("%s [OPTIONS...] {COMMAND}\n\n"
                "Send control commands to the init daemon.\n\n"
                "     --help      Show this help\n"
-               "     --no-wall   Don't send wall message before reboot/halt/power-off\n\n"
+               "     --no-wall   Don't send wall message before halt/power-off/reboot\n\n"
                "Commands:\n"
                "  0              Power-off the machine\n"
                "  6              Reboot the machine\n"
@@ -1526,7 +1526,7 @@ static int telinit_help(void) {
 
 static int runlevel_help(void) {
 
-        printf("%s [options]\n\n"
+        printf("%s [OPTIONS...]\n\n"
                "Prints the previous and current runlevel of the init system.\n\n"
                "     --help      Show this help\n",
                program_invocation_short_name);
@@ -1839,7 +1839,7 @@ static int telinit_parse_argv(int argc, char *argv[]) {
         }
 
         if (optind >= argc) {
-                log_error("Argument missing.");
+                telinit_help();
                 return -EINVAL;
         }