[hackers] [sbase] nl(1) should handle up to 1 file || sin

[git]

commit 761599ae61b8c9dfc1af047e502f62cbb7e55e53
Author: sin <s...@2f30.org>
Date:   Thu Dec 4 12:04:41 2014 +0000

    nl(1) should handle up to 1 file

diff --git a/nl.1 b/nl.1
index c6e2ed5..61159b4 100644
--- a/nl.1
+++ b/nl.1
@@ -9,7 +9,7 @@ nl \- number lines
 .IR increment ]
 .RB [ \-s
 .IR separator ]
-.RI [ file ...]
+.RI [ file ]
 .SH DESCRIPTION
 .B nl
 reads each file in sequence and writes it to stdout with non\-empty lines
diff --git a/nl.c b/nl.c
index f21e133..44772ad 100644
--- a/nl.c
+++ b/nl.c
@@ -18,8 +18,7 @@ static regex_t preg;
 static void
 usage(void)
 {
-       eprintf("usage: %s [-b style] [-i increment] [-s sep] [FILE...]\n",
-                       argv0);
+       eprintf("usage: %s [-b style] [-i increment] [-s sep] [file]\n", argv0);
 }
 
 int
@@ -27,7 +26,6 @@ main(int argc, char *argv[])
 {
        FILE *fp;
        char *r;
-       int ret = 0;
 
        ARGBEGIN {
        case 'b':
@@ -48,18 +46,18 @@ main(int argc, char *argv[])
                usage();
        } ARGEND;
 
+       if (argc > 1)
+               usage();
+
        if (argc == 0) {
                nl("<stdin>", stdin);
-       } else for (; argc > 0; argc--, argv++) {
-               if (!(fp = fopen(argv[0], "r"))) {
-                       weprintf("fopen %s:", argv[0]);
-                       ret = 1;
-                       continue;
-               }
+       } else {
+               if (!(fp = fopen(argv[0], "r")))
+                       eprintf("fopen %s:", argv[0]);
                nl(argv[0], fp);
                fclose(fp);
        }
-       return ret;
+       return 0;
 }
 
 void