nsswitch revision 136224 
1#!/bin/sh
2#
3# Copyright (c) 1993 - 2004 The FreeBSD Project. All rights reserved.
4#
5# Redistribution and use in source and binary forms, with or without
6# modification, are permitted provided that the following conditions
7# are met:
8# 1. Redistributions of source code must retain the above copyright
9#    notice, this list of conditions and the following disclaimer.
10# 2. Redistributions in binary form must reproduce the above copyright
11#    notice, this list of conditions and the following disclaimer in the
12#    documentation and/or other materials provided with the distribution.
13#
14# THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
15# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17# ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
18# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24# SUCH DAMAGE.
25#
26# $FreeBSD: head/etc/rc.d/nsswitch 136224 2004-10-07 13:55:26Z mtm $
27#
28
29# PROVIDE: nsswitch
30# REQUIRE: root
31# BEFORE:  NETWORK
32
33. /etc/rc.subr
34
35name="nsswitch"
36start_cmd="nsswitch_start"
37stop_cmd=":"
38
39convert_host_conf()
40{
41    host_conf=$1; shift;
42    nsswitch_conf=$1; shift;
43    awk '                                                                   \
44        /^[:blank:]*#/       { next }                                       \
45        /(hosts|local|file)/ { nsswitch[c] = "files"; c++; next }           \
46        /(dns|bind)/         { nsswitch[c] = "dns";   c++; next }           \
47        /nis/                { nsswitch[c] = "nis";   c++; next }           \
48        { printf "Warning: unrecognized line [%s]", $0 > "/dev/stderr" }    \
49        END {                                                               \
50                printf "hosts: ";                                           \
51                for (i in nsswitch) printf "%s ", nsswitch[i];              \
52                printf "\n";                                                \
53        }' < $host_conf > $nsswitch_conf
54}
55
56generate_nsswitch_conf()
57{
58    nsswitch_conf=$1; shift;
59
60    cat >$nsswitch_conf <<EOF
61group: compat
62group_compat: nis
63hosts: files dns
64networks: files
65passwd: compat
66passwd_compat: nis
67shells: files
68EOF
69}
70
71generate_host_conf()
72{
73    nsswitch_conf=$1; shift;
74    host_conf=$1; shift;
75
76    awk '
77BEGIN {
78    xlat["files"] = "hosts";
79    xlat["dns"] = "bind";
80    xlat["nis"] = "nis";
81    cont = 0;
82}
83sub(/^[\t ]*hosts:/, "") || cont {
84    if (!cont)
85        srcs = ""
86    sub(/#.*/, "")
87    gsub(/[][]/, " & ")
88    cont = sub(/\\$/, "")
89    srcs = srcs " " $0
90}
91END {
92    print "# Auto-generated from nsswitch.conf, do not edit"
93    ns = split(srcs, s)
94    for (n = 1; n <= ns; ++n) {
95        if (s[n] in xlat)
96            print xlat[s[n]]
97    }
98}
99' <$nsswitch_conf >$host_conf
100}
101
102nsswitch_start()
103{
104	# Convert host.conf to nsswitch.conf if necessary
105	#
106	if [ -f "/etc/host.conf" -a ! -f "/etc/nsswitch.conf" ]; then
107		echo ''
108		echo 'Warning: /etc/host.conf is no longer used'
109		echo '  /etc/nsswitch.conf will be created for you'
110		convert_host_conf /etc/host.conf /etc/nsswitch.conf
111	fi
112
113	# Generate default nsswitch.conf if none exists
114	#
115	if [ ! -f "/etc/nsswitch.conf" ]; then
116		echo 'Generating nsswitch.conf.'
117		generate_nsswitch_conf /etc/nsswitch.conf
118	fi
119
120	# Generate host.conf for compatibility
121	#
122	if [ ! -f "/etc/host.conf" ]; then
123		echo 'Generating host.conf.'
124		generate_host_conf /etc/nsswitch.conf /etc/host.conf
125	fi
126
127}
128
129load_rc_config $name
130run_rc_command "$1"
131