shithub: neatpost

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post: print a help message when unknown options are given

--- a/post.c

+++ b/post.c

@@ -1,7 +1,7 @@

 /*

  * neatpost troff postscript postprocessor

  *

- * Copyright (C) 2013 Ali Gholami Rudi <ali at rudi dot ir>

+ * Copyright (C) 2013-2014 Ali Gholami Rudi <ali at rudi dot ir>

  *

  * This program is released under the Modified BSD license.

  */

@@ -327,12 +327,22 @@

 		ps_pageend(o_pg);

 }

+static char *usage =

+	"Usage: neatpost [options] <input >output\n\n"

+	"Options:\n"

+	"  -Fdir \tset font directory (" TROFFFDIR ")\n";

+

 int main(int argc, char *argv[])

 {

 	int i;

-	for (i = 1; i < argc; i++)

-		if (argv[i][0] == '-' && argv[i][1] == 'F')

+	for (i = 1; i < argc; i++) {

+		if (argv[i][0] == '-' && argv[i][1] == 'F') {

 			strcpy(devpath, argv[i][2] ? argv[i] + 2 : argv[++i]);

+		} else {

+			printf("%s", usage);

+			return 0;

+		}

+	}

 	post();

 	ps_trailer(o_pg, o_fonts);

 	return 0;