Add -version option to print version number

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

2 files changed, 8 insertions, 0 deletions

diff --git a/man/xdpyinfo.man b/man/xdpyinfo.man
index 6dfc789..86f2a02 100644
--- a/man/xdpyinfo.man
+++ b/man/xdpyinfo.man
@@ -30,6 +30,7 @@ xdpyinfo \- display information utility for X
 [\-display \fIdisplayname\fP]
 [\-queryExtensions]
 [\-ext \fIextension-name\fP]
+[-version]
 .SH DESCRIPTION
 .PP
 .I Xdpyinfo
@@ -49,6 +50,9 @@ Detailed information about a particular extension is displayed with the
 \fB\-ext\fP \fIextensionName\fP option.  If \fIextensionName\fP is
 \fBall\fP, information about all extensions supported by both \fIxdpyinfo\fP
 and the server is displayed.
+.PP
+If \fB-version\fP is specified, xdpyinfo prints its version and exits, without
+contacting the X server.
 .SH ENVIRONMENT
 .PP
 .TP 8
diff --git a/xdpyinfo.c b/xdpyinfo.c
index 26bb0fb..655d672 100644
--- a/xdpyinfo.c
+++ b/xdpyinfo.c
@@ -1441,6 +1441,7 @@ usage(void)
 {
     fprintf (stderr, "usage:  %s [options]\n%s", ProgramName,
              "-display displayname\tserver to query\n"
+             "-version\t\tprint program version and exit\n"
              "-queryExtensions\tprint info returned by XQueryExtension\n"
              "-ext all\t\tprint detailed info for all supported extensions\n"
              "-ext extension-name\tprint detailed info for extension-name if one of:\n     ");
@@ -1470,6 +1471,9 @@ main(int argc, char *argv[])
 	} else if (!strncmp("-ext", arg, len)) {
 	    if (++i >= argc) usage ();
 	    mark_extension_for_printing(argv[i]);
+        } else if (!strncmp("-version", arg, len)) {
+            printf("%s\n", PACKAGE_STRING);
+            exit (0);
 	} else
 	    usage ();
     }