[hackers] [sbase] Respect exit status in head(1) || sin

[git]

commit 2a84dd507611a461efbddffe8f8f6b2b518fed67
Author: sin <s...@2f30.org>
Date:   Thu Nov 20 22:39:29 2014 +0000

    Respect exit status in head(1)

diff --git a/head.c b/head.c
index f2c6206..ec40446 100644
--- a/head.c
+++ b/head.c
@@ -12,7 +12,7 @@ static void head(FILE *, const char *, long);
 static void
 usage(void)
 {
-       eprintf("usage: %s [-n] [FILE...]\n", argv0);
+       eprintf("usage: %s [-n lines] [file...]\n", argv0);
 }
 
 int
@@ -20,6 +20,7 @@ main(int argc, char *argv[])
 {
        long n = 10;
        FILE *fp;
+       int ret = 0;
 
        ARGBEGIN {
        case 'n':
@@ -38,14 +39,14 @@ main(int argc, char *argv[])
                for (; argc > 0; argc--, argv++) {
                        if (!(fp = fopen(argv[0], "r"))) {
                                weprintf("fopen %s:", argv[0]);
+                               ret = 1;
                                continue;
                        }
                        head(fp, argv[0], n);
                        fclose(fp);
                }
        }
-
-       return 0;
+       return ret;
 }
 
 static void