shithub: neatroff

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roff: print usage to stderr and return 1 on bad options

so that if an incorrect option is given in a pipeline, the error message can be seen.

--- a/roff.c

+++ b/roff.c

@@ -133,8 +133,8 @@

 			dev = argv[i][2] ? argv[i] + 2 : argv[++i];

 			break;

 		default:

-			printf("%s", usage);

-			return 0;

+			fprintf(stderr, "%s", usage);

+			return 1;

 		}

 	}

 	if (dev_open(fontdir, dev)) {