etc/rc.d/nsswitch

   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 # $FreeBSD$
  27 #
  28
  29 # PROVIDE: nsswitch
  30 # REQUIRE: root
  31 # BEFORE:  NETWORK
  32
  33 . /etc/rc.subr
  34
  35 name="nsswitch"
  36 start_cmd="nsswitch_start"
  37 stop_cmd=":"
  38
  39 convert_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
  56 generate_nsswitch_conf()
  57 {
  58     nsswitch_conf=$1; shift;
  59
  60     cat >$nsswitch_conf <<EOF
  61 group: compat
  62 group_compat: nis
  63 hosts: files dns
  64 networks: files
  65 passwd: compat
  66 passwd_compat: nis
  67 shells: files
  68 EOF
  69 }
  70
  71 generate_host_conf()
  72 {
  73     nsswitch_conf=$1; shift;
  74     host_conf=$1; shift;
  75
  76     awk '
  77 BEGIN {
  78     xlat["files"] = "hosts";
  79     xlat["dns"] = "bind";
  80     xlat["nis"] = "nis";
  81     cont = 0;
  82 }
  83 sub(/^[\t ]*hosts:/, "") || cont {
  84     if (!cont)
  85         srcs = ""
  86     sub(/#.*/, "")
  87     gsub(/[][]/, " & ")
  88     cont = sub(/\\$/, "")
  89     srcs = srcs " " $0
  90 }
  91 END {
  92     print "# Auto-generated from nsswitch.conf, do not edit"
  93     ns = split(srcs, s)
  94     for (n = 1; n <= ns; ++n) {
  95         if (s[n] in xlat)
  96             print xlat[s[n]]
  97     }
  98 }
  99 ' <$nsswitch_conf >$host_conf
 100 }
 101
 102 nsswitch_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
 129 load_rc_config $name
 130 run_rc_command "$1"