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authorChristian Neukirchen <chneukirchen@gmail.com>2016-07-26 22:09:02 +0200
committerChristian Neukirchen <chneukirchen@gmail.com>2016-07-26 22:09:26 +0200
commit3d694808eb0dafc8c952ea4716265c040bdd2277 (patch)
tree4c39ad601328ccfe79f6fb2f1376ed742a1f0e6f /mseq.c
parent3257fce1b8f00ced0807db7b4263ab855f296aa8 (diff)
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mseq: add usage
Diffstat (limited to 'mseq.c')
-rw-r--r--mseq.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/mseq.c b/mseq.c
index 87ff6f1..b1a1c7f 100644
--- a/mseq.c
+++ b/mseq.c
@@ -259,7 +259,13 @@ main(int argc, char *argv[])
 		case 'C': Cflag = optarg; break;
 		case 'S': Sflag = 1; break;
 		default:
-			// XXX usage
+		usage:
+			fprintf(stderr,
+			    "Usage: mseq [-fnr] [msgs...]\n"
+			    "       mseq -S [-fr] < sequence\n"
+			    "       mseq -A [-fr] < sequence\n"
+			    "       mseq -C msg\n"
+			);
 			exit(1);
 		}
 
@@ -269,12 +275,12 @@ main(int argc, char *argv[])
 	}
 
 	if (nflag && Sflag) {
-		fprintf(stderr, "-n and -S/-A doesn't make sense.\n");
-		exit(1);
+		fprintf(stderr, "error: -n and -S/-A doesn't make sense.\n");
+		goto usage;
 	}
 	if (Sflag && optind != argc) {
-		fprintf(stderr, "-S/-A doesn't take arguments.\n");
-		exit(1);
+		fprintf(stderr, "error: -S/-A doesn't take arguments.\n");
+		goto usage;
 	}
 
 	if (optind == argc && !isatty(0))