[src/trunk]: src/usr.bin/uudecode Support both "-" and "/dev/stdout" as refer...

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

details:   https://anonhg.NetBSD.org/src/rev/d155a80b13cd
branches:  trunk
changeset: 784453:d155a80b13cd
user:      apb <apb%NetBSD.org@localhost>
date:      Mon Jan 28 19:50:30 2013 +0000

description:
Support both "-" and "/dev/stdout" as references to standard
output.  Add comments about what POSIX says regarding stdout.
Also add comments about what POSIX says regarding file mode.
---

diffstat:

 usr.bin/uudecode/uudecode.c |  24 +++++++++++++++++++-----
 1 files changed, 19 insertions(+), 5 deletions(-)

diffs (46 lines):

diff -r a0712ab60296 -r d155a80b13cd usr.bin/uudecode/uudecode.c
--- a/usr.bin/uudecode/uudecode.c       Mon Jan 28 19:47:02 2013 +0000
+++ b/usr.bin/uudecode/uudecode.c       Mon Jan 28 19:50:30 2013 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: uudecode.c,v 1.27 2013/01/28 16:06:42 apb Exp $        */
+/*     $NetBSD: uudecode.c,v 1.28 2013/01/28 19:50:30 apb Exp $        */
 
 /*-
  * Copyright (c) 1983, 1993
@@ -40,7 +40,7 @@
 #if 0
 static char sccsid[] = "@(#)uudecode.c 8.2 (Berkeley) 4/2/94";
 #endif
-__RCSID("$NetBSD: uudecode.c,v 1.27 2013/01/28 16:06:42 apb Exp $");
+__RCSID("$NetBSD: uudecode.c,v 1.28 2013/01/28 19:50:30 apb Exp $");
 #endif /* not lint */
 
 /*
@@ -200,10 +200,24 @@
                fn = buf;
        }
 
-       if (strcmp(fn, "/dev/stdout") == 0) {
-               /* use stdout */
+       if (strcmp(fn, "/dev/stdout") == 0 || strcmp(fn, "-") == 0) {
+               /*
+                * POSIX.1-2008 says that both "-" and "/dev/stdout"
+                * refer to standard output when they appear in the file
+                * header, but only "/dev/stdout" refers to standard
+                * output when it appears as the argument to the "-o"
+                * command line option.
+                *
+                * We handle both special names, regardless of whether
+                * they came from the "-o" option or from the header of
+                * the input stream.
+                */
        } else {
-               /* create output file, set mode */
+               /*
+                * Create output file, and set its mode.  POSIX.1-2008
+                * requires the mode to be used exactly, ignoring the
+                * umask and anything else, but we mask it with 0666.
+                */
                if (freopen(fn, "w", stdout) == NULL ||
                    fchmod(fileno(stdout), mode & 0666) != 0) { 
                        warn("%s: %s", fn, inputname);