[src/trunk]: src/sbin/slattach use daemon(3) instead of vanilla fork()

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

details:   https://anonhg.NetBSD.org/src/rev/f9973303a43d
branches:  trunk
changeset: 476020:f9973303a43d
user:      proff <proff%NetBSD.org@localhost>
date:      Fri Sep 03 13:31:29 1999 +0000

description:
use daemon(3) instead of vanilla fork()
use err(3) instead of perror..exit
add new flag: -n don't detach from tty

diffstat:

 sbin/slattach/slattach.c |  21 +++++++++++----------
 1 files changed, 11 insertions(+), 10 deletions(-)

diffs (64 lines):

diff -r 591015808846 -r f9973303a43d sbin/slattach/slattach.c
--- a/sbin/slattach/slattach.c  Fri Sep 03 13:29:44 1999 +0000
+++ b/sbin/slattach/slattach.c  Fri Sep 03 13:31:29 1999 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: slattach.c,v 1.21 1998/03/23 04:41:16 fair Exp $       */
+/*     $NetBSD: slattach.c,v 1.22 1999/09/03 13:31:29 proff Exp $      */
 
 /*
  * Copyright (c) 1988, 1993
@@ -46,7 +46,7 @@
 #if 0
 static char sccsid[] = "@(#)slattach.c 8.2 (Berkeley) 1/7/94";
 #else
-__RCSID("$NetBSD: slattach.c,v 1.21 1998/03/23 04:41:16 fair Exp $");
+__RCSID("$NetBSD: slattach.c,v 1.22 1999/09/03 13:31:29 proff Exp $");
 #endif
 #endif /* not lint */
 
@@ -90,8 +90,9 @@
        tcflag_t cflag = HUPCL;
        int ch;
        sigset_t sigset;
+       int opt_detach = 1;
 
-       while ((ch = getopt(argc, argv, "hHlms:t:")) != -1) {
+       while ((ch = getopt(argc, argv, "hHlmns:t:")) != -1) {
                switch (ch) {
                case 'h':
                        cflag |= CRTSCTS;
@@ -105,6 +106,9 @@
                case 'm':
                        cflag &= ~HUPCL;
                        break;
+               case 'n':
+                       opt_detach = 0;
+                       break;
                case 's':
                        speed = atoi(optarg);
                        break;
@@ -128,10 +132,8 @@
                    "%s%s", _PATH_DEV, dev);
                dev = devicename;
        }
-       if ((fd = open(dev, O_RDWR | O_NDELAY)) < 0) {
-               perror(dev);
-               exit(1);
-       }
+       if ((fd = open(dev, O_RDWR | O_NDELAY)) < 0)
+               err(1, "%s", dev);
        tty.c_cflag = CREAD | CS8 | cflag;
        tty.c_iflag = 0;
        tty.c_lflag = 0;
@@ -145,9 +147,8 @@
                err(1, "TIOCSDTR");
        if (ioctl(fd, TIOCSETD, &slipdisc) < 0)
                err(1, "TIOCSETD");
-
-       if (fork() > 0)
-               exit(0);
+       if (opt_detach && daemon(0, 0) != 0)
+               err(1, "couldn't detach");
        sigemptyset(&sigset);
        for (;;)
                sigsuspend(&sigset);