[src/trunk]: src/lib/libc/gen explain we we want wide character support here.

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

details:   https://anonhg.NetBSD.org/src/rev/daf50fa0bc83
branches:  trunk
changeset: 784889:daf50fa0bc83
user:      christos <christos%NetBSD.org@localhost>
date:      Wed Feb 13 04:58:17 2013 +0000

description:
explain we we want wide character support here.

diffstat:

 lib/libc/gen/vis.c |  12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)

diffs (33 lines):

diff -r 16b4e4883ac7 -r daf50fa0bc83 lib/libc/gen/vis.c
--- a/lib/libc/gen/vis.c        Wed Feb 13 04:52:31 2013 +0000
+++ b/lib/libc/gen/vis.c        Wed Feb 13 04:58:17 2013 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: vis.c,v 1.46 2013/02/13 04:49:59 christos Exp $        */
+/*     $NetBSD: vis.c,v 1.47 2013/02/13 04:58:17 christos Exp $        */
 
 /*-
  * Copyright (c) 1989, 1993
@@ -57,7 +57,7 @@
 
 #include <sys/cdefs.h>
 #if defined(LIBC_SCCS) && !defined(lint)
-__RCSID("$NetBSD: vis.c,v 1.46 2013/02/13 04:49:59 christos Exp $");
+__RCSID("$NetBSD: vis.c,v 1.47 2013/02/13 04:58:17 christos Exp $");
 #endif /* LIBC_SCCS and not lint */
 #ifdef __FBSDID
 __FBSDID("$FreeBSD$");
@@ -84,6 +84,14 @@
 #include <stdio.h>
 #include <string.h>
 
+/*
+ * The reason for going through the trouble to deal with character encodings
+ * in vis(3), is that we use this to safe encode output of commands. This
+ * safe encoding varies depending on the character set. For example if we
+ * display ps output in French, we don't want to display French characters
+ * as M-foo.
+ */
+
 static wchar_t *do_svis(wchar_t *, int, int, int, const wchar_t *);
 
 #undef BELL