-V/--version option for alf.

3 files changed, 35 insertions, 1 deletions

diff --git a/src/alf.1 b/src/alf.1
index 2266526..82d462b 100644
--- a/src/alf.1
+++ b/src/alf.1
@@ -69,11 +69,27 @@ is made with \fB\-a\fP\&.
 .
 .INDENT 0.0
 .TP
+.B  \-h\fP,\fB  \-\-help
+Show built\-in help message.
+.UNINDENT
+.\" show this help message.
+.
+.INDENT 0.0
+.TP
 .B  \-o
 Overwrite \fIalf\-file\fP if it exists; do not make a \fB~\fP backup.
 .UNINDENT
 .\" overwrite alf file if exists (do not create file~ backup).
 .
+.INDENT 0.0
+.TP
+.B  \-V\fP,\fB  \-\-version
+Show \fBunalf\fP version number and exit.
+.UNINDENT
+.\" show version number.
+.
+.\" ENDOPTS
+.
 .SH EXIT STATUS
 .INDENT 0.0
 .TP
diff --git a/src/alf.c b/src/alf.c
index d294378..725b109 100644
--- a/src/alf.c
+++ b/src/alf.c
@@ -357,13 +357,19 @@ int main(int argc, char **argv) {
 		usage();
 	}
 
+	if(!strcmp(argv[1], "--version")) {
+		puts(VERSION);
+		exit(0);
+	}
+
 	/* don't let getopt() print error message for us. */
 	opterr = 0;
 
-	while((opt = getopt(argc, argv, "ao")) != -1) {
+	while((opt = getopt(argc, argv, "aoV")) != -1) {
 		switch(opt) {
 			case 'a': opt_append = 1; opt_overwrite = 1; break;
 			case 'o': opt_overwrite = 1; opt_append = 0; break;
+			case 'V': puts(VERSION); exit(0); break;
 			default:
 				fprintf(stderr, "%s: fatal: invalid option '-%c' (try -h or --help)\n", self, optopt);
 				exit(1);
diff --git a/src/alf.rst b/src/alf.rst
index 898efb3..879d0da 100644
--- a/src/alf.rst
+++ b/src/alf.rst
@@ -55,11 +55,23 @@ OPTIONS
 
 .. append to alf file.
 
+-h, --help
+   Show built-in help message.
+
+.. show this help message.
+
 -o
   Overwrite *alf-file* if it exists; do not make a **~** backup.
 
 .. overwrite alf file if exists (do not create file~ backup).
 
+-V, --version
+  Show **unalf** version number and exit.
+
+.. show version number.
+
+.. ENDOPTS
+
 EXIT STATUS
 ===========