tools: print version number in libinput-list-devices

Makes debugging a bit easier when you can just ask users to do that instead of
digging around in whatever packaging system they have.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-By: Derek Foreman <derekf@osg.samsung.com>

diff --git a/tools/libinput-list-devices.c b/tools/libinput-list-devices.c
index 24c7c53..c9e1191 100644 (file)
--- a/tools/libinput-list-devices.c
+++ b/tools/libinput-list-devices.c
@@ -30,6 +30,7 @@
 #include <libudev.h>
 
 #include <libinput.h>
+#include <libinput-version.h>
 
 #include "shared.h"
 
@@ -240,6 +241,23 @@ print_device_notify(struct libinput_event *ev)
        printf("\n");
 }
 
+static inline void
+usage(void)
+{
+       printf("Usage: %s [--help|--version]\n"
+              "\n"
+              "This tool creates a libinput context on the default seat \"seat0\"\n"
+              "and lists all devices recognized by libinput and the configuration options.\n"
+              "Where multiple options are possible, the default is prefixed with \"*\".\n"
+              "\n"
+              "Options:\n"
+              "--help ...... show this help\n"
+              "--version ... show version information\n"
+              "\n"
+              "This tool requires access to the /dev/input/eventX nodes.\n",
+              program_invocation_short_name);
+}
+
 int
 main(int argc, char **argv)
 {
@@ -248,16 +266,16 @@ main(int argc, char **argv)
        struct libinput_event *ev;
 
        if (argc > 1) {
-               printf("Usage: %s [--help]\n"
-                      "\n"
-                      "This tool creates a libinput context on the default seat \"seat0\"\n"
-                      "and lists all devices recognized by libinput and the configuration options.\n"
-                      "Where multiple options are possible, the default is prefixed with \"*\".\n"
-                      "\n"
-                      "This tool requires access to the /dev/input/eventX nodes.\n",
-                      program_invocation_short_name);
-
-               return 1;
+               if (strcmp(argv[1], "--help") == 0) {
+                       usage();
+                       return 0;
+               } else if (strcmp(argv[1], "--version") == 0) {
+                       printf("%s\n", LIBINPUT_VERSION);
+                       return 0;
+               } else {
+                       usage();
+                       return 1;
+               }
        }
 
        tools_init_options(&options);