grepc, grepc.1: -h: Add option to print the usage message.

Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>

1 files changed, 38 insertions, 12 deletions

diff --git a/bin/grepc b/bin/grepc
index ad60951..3d78821 100755
--- a/bin/grepc
+++ b/bin/grepc
@@ -1,10 +1,34 @@
 #!/bin/sh
 
 
-if [ $# -ne 1 ]; then
-	>&2 echo "Usage: $0 IDENTIFIER";
-	exit 1;
-fi;
+grepc_usage()
+{
+	echo "Usage: $0 [OPTION] IDENTIFIER";
+}
+
+
+grepc_parse_cmd()
+{
+	while getopts "h" opt; do
+		case "$opt" in
+		h)
+			grepc_usage;
+			exit 0;
+			;;
+		?)
+			grepc_usage >&2;
+			exit 1;
+			;;
+		esac;
+	done;
+	shift $(($OPTIND-1));
+
+	if [ $# -ne 1 ]; then
+		grepc_usage >&2;
+		exit 1;
+	fi;
+	identifier=$1;
+}
 
 
 grepc_find_files()
@@ -180,15 +204,17 @@ grepc_type()
 
 main()
 {
-	grepc_find_files "$1";
+	grepc_parse_cmd $@;
+
+	grepc_find_files "$identifier";
 
-	grepc_macro "$1";
-	grepc_enum_constant "$1";
-	grepc_func "$1";
-	grepc_linux "$1";
-	grepc_glibc "$1";
-	grepc_type "$1";
+	grepc_macro "$identifier";
+	grepc_enum_constant "$identifier";
+	grepc_func "$identifier";
+	grepc_linux "$identifier";
+	grepc_glibc "$identifier";
+	grepc_type "$identifier";
 }
 
 
-main "$1";
+main $@;