[src/trunk]: src/sbin/chown - use {g,s}etprogname()

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

details:   https://anonhg.NetBSD.org/src/rev/e5833974f0ca
branches:  trunk
changeset: 782250:e5833974f0ca
user:      christos <christos%NetBSD.org@localhost>
date:      Tue Oct 23 17:55:46 2012 +0000

description:
- use {g,s}etprogname()
- fix usage

diffstat:

 sbin/chown/chown.c |  16 ++++++++++------
 1 files changed, 10 insertions(+), 6 deletions(-)

diffs (52 lines):

diff -r ec2fe7476af0 -r e5833974f0ca sbin/chown/chown.c
--- a/sbin/chown/chown.c        Tue Oct 23 17:30:59 2012 +0000
+++ b/sbin/chown/chown.c        Tue Oct 23 17:55:46 2012 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: chown.c,v 1.6 2012/10/22 18:02:26 christos Exp $       */
+/*     $NetBSD: chown.c,v 1.7 2012/10/23 17:55:46 christos Exp $       */
 
 /*
  * Copyright (c) 1988, 1993, 1994, 2003
@@ -39,7 +39,7 @@
 #if 0
 static char sccsid[] = "@(#)chown.c    8.8 (Berkeley) 4/4/94";
 #else
-__RCSID("$NetBSD: chown.c,v 1.6 2012/10/22 18:02:26 christos Exp $");
+__RCSID("$NetBSD: chown.c,v 1.7 2012/10/23 17:55:46 christos Exp $");
 #endif
 #endif /* not lint */
 
@@ -68,7 +68,7 @@
 static uid_t uid;
 static gid_t gid;
 static int ischown;
-static char *myname;
+static const char *myname;
 
 struct option chown_longopts[] = {
        { "reference",          required_argument,      0,
@@ -86,9 +86,11 @@
        char *cp, *reference;
        int (*change_owner)(const char *, uid_t, gid_t);
 
+       setprogname(*argv);
+
        (void)setlocale(LC_ALL, "");
 
-       myname = (cp = strrchr(*argv, '/')) ? cp + 1 : *argv;
+       myname = getprogname();
        ischown = (myname[2] == 'o');
        reference = NULL;
 
@@ -292,7 +294,9 @@
 {
 
        (void)fprintf(stderr,
-           "usage: %s [-R [-H | -L | -P]] [-fhv] %s file ...\n",
-           myname, ischown ? "[owner][:group]" : "group");
+           "Usage: %s [-R [-H | -L | -P]] [-fhv] %s file ...\n"
+           "\t%s [-R [-H | -L | -P]] [-fhv] --reference=rfile file ...\n",
+           myname, ischown ? "owner:group|owner|:group" : "group",
+           myname);
        exit(EXIT_FAILURE);
 }