Add -version option to print program version

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

2 files changed, 11 insertions, 1 deletions

diff --git a/man/xprop.man b/man/xprop.man
index 81dc021..245cf9a 100644
--- a/man/xprop.man
+++ b/man/xprop.man
@@ -36,6 +36,7 @@ xprop - property displayer for X
 [-remove \fIproperty-name\fP]
 [-set \fIproperty-name\fP \fIvalue\fP]
 [-spy]
+[-version]
 [-f \fIatom\fP \fIformat\fP [\fIdformat\fP]]*
 [\fIformat\fP [\fIdformat\fP] \fIatom\fP]*
 .SH SUMMARY
@@ -121,6 +122,10 @@ indicated window.
 Examine window properties forever, looking for property change events.
 .PP
 .TP 8
+.B "-verson"
+Print program version information and exit.
+.PP
+.TP 8
 .B "-f \fIname\fP \fIformat\fP [\fIdformat\fP]"
 Specifies that the \fIformat\fP for \fIname\fP should be \fIformat\fP and that
 the \fIdformat\fP for \fIname\fP should be \fIdformat\fP.  If \fIdformat\fP
diff --git a/xprop.c b/xprop.c
index 3885ddc..a4ee2c9 100644
--- a/xprop.c
+++ b/xprop.c
@@ -1785,7 +1785,8 @@ usage (const char *errmsg)
 "    -fs filename                   where to look for formats for properties\n"
 "    -frame                         don't ignore window manager frames\n"
 "    -f propname format [dformat]   formats to use for property of given name\n"
-"    -spy                           examine window properties forever\n";
+"    -spy                           examine window properties forever\n"
+"    -version                       print program version\n";
 
 
     fflush (stdout);
@@ -1970,6 +1971,10 @@ main (int argc, char **argv)
 	    Parse_Format_Mapping(&argc, &argv);
 	    continue;
 	}
+	if (!strcmp(argv[0], "-version")) {
+	    puts(PACKAGE_STRING);
+	    exit(0);
+	}
 	fprintf (stderr, "%s: unrecognized argument %s\n\n",
 		 program_name, argv[0]);
 	usage(NULL);