Audit dirname(1)

Be stricter about the number of arguments passed to it.

README

@@ -24,7 +24,7 @@ The following tools are implemented ('*' == finished, '#' == UTF-8 support,
 =*  cron            non-posix                    none
 #*  cut             yes                          none
 =*  date            yes                          -u
-=*  dirname         yes                          none
+=*| dirname         yes                          none
 =*  du              yes                          none
 =*  echo            yes                          none
 =*  env             yes                          none

dirname.1

@@ -1,4 +1,4 @@
-.Dd January 23, 2015
+.Dd February 28, 2015
 .Dt DIRNAME 1
 .Os sbase
 .Sh NAME
@@ -9,9 +9,9 @@
 .Ar path
 .Sh DESCRIPTION
 .Nm
-prints
+writes
 .Ar path
-with its final path component removed.
+with its final path component removed to stdout.
 .Sh SEE ALSO
 .Xr basename 1 ,
 .Xr dirname 3

dirname.c

@@ -18,7 +18,7 @@ main(int argc, char *argv[])
 		usage();
 	} ARGEND;
 
-	if (argc < 1)
+	if (argc != 1)
 		usage();
 
 	puts(dirname(argv[0]));