[src/trunk]: src/bin/echo Catch up with /bin/sh built-in echo ... if a write ...

[kre <kre%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/02b435a708ee
branches:  trunk
changeset: 379215:02b435a708ee
user:      kre <kre%NetBSD.org@localhost>
date:      Wed May 19 22:12:36 2021 +0000

description:
Catch up with /bin/sh built-in echo ... if a write error occurs,
don't just exit(1), write an error message to stderr as well
(required for POSIX conformance).

diffstat:

 bin/echo/echo.c |  7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diffs (31 lines):

diff -r 0cb48449277d -r 02b435a708ee bin/echo/echo.c
--- a/bin/echo/echo.c   Wed May 19 16:06:13 2021 +0000
+++ b/bin/echo/echo.c   Wed May 19 22:12:36 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: echo.c,v 1.19 2016/09/05 01:00:07 sevan Exp $      */
+/* $NetBSD: echo.c,v 1.20 2021/05/19 22:12:36 kre Exp $        */
 
 /*
  * Copyright (c) 1989, 1993
@@ -40,10 +40,11 @@
 #if 0
 static char sccsid[] = "@(#)echo.c     8.1 (Berkeley) 5/31/93";
 #else
-__RCSID("$NetBSD: echo.c,v 1.19 2016/09/05 01:00:07 sevan Exp $");
+__RCSID("$NetBSD: echo.c,v 1.20 2021/05/19 22:12:36 kre Exp $");
 #endif
 #endif /* not lint */
 
+#include <err.h>
 #include <locale.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -75,7 +76,7 @@ main(int argc, char *argv[])
                (void)putchar('\n');
        fflush(stdout);
        if (ferror(stdout))
-               exit(1);
+               err(1, "write error");
        exit(0);
        /* NOTREACHED */
 }