unprotbas: add --help and --version.

1 files changed, 17 insertions, 1 deletions

diff --git a/unprotbas.c b/unprotbas.c
index 7ee5d03..1697aa8 100644
--- a/unprotbas.c
+++ b/unprotbas.c
@@ -604,7 +604,7 @@ void scramble_vars(void) {
 }
 
 void print_help(void) {
-	fprintf(stderr, "Usage: %s [-v] [[-f] [-n] [-g] [-c] [-r|-w] | [-p|-pc|-pv] ] <inputfile> <outputfile>\n", self);
+	fprintf(stderr, "Usage: %s [-v] [[-f] [-n] [-g] [-c] [-r|-w] | [-p|-pc|-pv]] <inputfile> <outputfile>\n", self);
 	fprintf(stderr, "-v: verbose\n");
 	fprintf(stderr, "-f: force variable name table rebuild\n");
 	fprintf(stderr, "-n: do not rebuild variable name table, even if it's invalid\n");
@@ -663,11 +663,27 @@ void open_output(const char *name) {
 }
 
 void parse_args(int argc, char **argv) {
+	char *p;
+
 	self = *argv;
+	p = strrchr(self, '/');
+	if(p) self = p + 1;
+
 	if(argc < 2) {
 		print_help();
+		exit(1);
+	}
+
+	if(strcmp(argv[1], "--help") == 0) {
+		print_help();
 		exit(0);
 	}
+
+	if(strcmp(argv[1], "--version") == 0) {
+		printf("%s %s\n", self, VERSION);
+		exit(0);
+	}
+
 	while(++argv, --argc) {
 		if((*argv)[0] == '-') {
 			switch((*argv)[1]) {