ovs-appctl: Rename 'help' to 'list-commands'.

Having 'ovs-appctl help' and 'ovs-appctl --help' print different
output is confusing.  This commit renames the 'help' to 'list-commands'.
Also, future patches will add the 'list-commands' to other ovs-*
commands, and the output will be used by bash command-line completion
script.

Signed-off-by: Alex Wang <alexw@nicira.com>
Acked-by: Ben Pfaff <blp@nicira.com>

lib/unixctl.c

@@ -63,8 +63,8 @@ static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 5);
 static struct shash commands = SHASH_INITIALIZER(&commands);
 
 static void
-unixctl_help(struct unixctl_conn *conn, int argc OVS_UNUSED,
-             const char *argv[] OVS_UNUSED, void *aux OVS_UNUSED)
+unixctl_list_commands(struct unixctl_conn *conn, int argc OVS_UNUSED,
+                      const char *argv[] OVS_UNUSED, void *aux OVS_UNUSED)
 {
     struct ds ds = DS_EMPTY_INITIALIZER;
     const struct shash_node **nodes = shash_sort(&commands);
@@ -93,7 +93,7 @@ unixctl_version(struct unixctl_conn *conn, int argc OVS_UNUSED,
 
 /* Registers a unixctl command with the given 'name'.  'usage' describes the
  * arguments to the command; it is used only for presentation to the user in
- * "help" output.
+ * "list-commands" output.
  *
  * 'cb' is called when the command is received.  It is passed an array
  * containing the command name and arguments, plus a copy of 'aux'.  Normally
@@ -243,7 +243,8 @@ unixctl_server_create(const char *path, struct unixctl_server **serverp)
         goto exit;
     }
 
-    unixctl_command_register("help", "", 0, 0, unixctl_help, NULL);
+    unixctl_command_register("list-commands", "", 0, 0, unixctl_list_commands,
+                             NULL);
     unixctl_command_register("version", "", 0, 0, unixctl_version, NULL);
 
     server = xmalloc(sizeof *server);

tests/unixctl-py.at

@@ -14,16 +14,16 @@ AT_CHECK([PYAPPCTL -t ovsdb-server exit], [0], [])
 OVS_WAIT_WHILE([test -s ovsdb-server.pid])
 AT_CLEANUP
 
-AT_SETUP([unixctl ovs-vswitchd help - Python])
+AT_SETUP([unixctl ovs-vswitchd list-commands - Python])
 AT_SKIP_IF([test $HAVE_PYTHON = no])
 OVS_VSWITCHD_START
 
-AT_CHECK([APPCTL help], [0], [stdout])
+AT_CHECK([APPCTL list-commands], [0], [stdout])
 AT_CHECK([head -1 stdout], [0], [dnl
 The available commands are:
 ])
 mv stdout expout
-AT_CHECK([PYAPPCTL help], [0], [expout])
+AT_CHECK([PYAPPCTL list-commands], [0], [expout])
 
 OVS_VSWITCHD_STOP
 AT_CLEANUP

utilities/ovs-appctl.8.in

@@ -73,7 +73,7 @@ Note that these commands are different from the \fB\-\-help\fR and
 \fB\-\-version\fR options that return information about the
 \fBovs\-appctl\fR utility itself.
 .
-.IP "\fBhelp\fR"
+.IP "\fBlist-commands\fR"
 Lists the commands supported by the target.
 .
 .IP "\fBversion\fR"

utilities/ovs-appctl.c

@@ -89,7 +89,7 @@ usage: %s [TARGET] COMMAND [ARG...]\n\
 Targets:\n\
   -t, --target=TARGET  pidfile or socket to contact\n\
 Common commands:\n\
-  help               List commands supported by the target\n\
+  list-commands      List commands supported by the target\n\
   version            Print version of the target\n\
   vlog/list          List current logging levels\n\
   vlog/set [SPEC]\n\