1#!/sbin/sh 2# 3# CDDL HEADER START 4# 5# The contents of this file are subject to the terms of the 6# Common Development and Distribution License (the "License"). 7# You may not use this file except in compliance with the License. 8# 9# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10# or http://www.opensolaris.org/os/licensing. 11# See the License for the specific language governing permissions 12# and limitations under the License. 13# 14# When distributing Covered Code, include this CDDL HEADER in each 15# file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16# If applicable, add the following below this CDDL HEADER, with the 17# fields enclosed by brackets "[]" replaced with your own identifying 18# information: Portions Copyright [yyyy] [name of copyright owner] 19# 20# CDDL HEADER END 21# 22# 23# Copyright 2010 Sun Microsystems, Inc. All rights reserved. 24# Use is subject to license terms. 25# 26 27# 28# This is third phase of TCP/IP startup/configuration. This script 29# runs after the NIS startup script. We run things here that may 30# depend on NIS maps. 31# 32 33. /lib/svc/share/smf_include.sh 34. /lib/svc/share/net_include.sh 35 36NWAM_FMRI="svc:/network/physical:nwam" 37 38case "$1" in 39'start') 40 # 41 # In a shared-IP zone we need this service to be up, but all of the 42 # work it tries to do is irrelevant (and will actually lead to the 43 # service failing if we try to do it), so just bail out. 44 # In the global zone and exclusive-IP zones we proceed. 45 # 46 smf_configure_ip || exit $SMF_EXIT_OK 47 48 # 49 # If nwam is enabled, the nwam service will handle the tasks performed 50 # by this service, so just bail out. 51 # 52 service_is_enabled $NWAM_FMRI && exit $SMF_EXIT_OK 53 ;; # fall through -- rest of script is the initialization code 54 55'stop') 56 exit $SMF_EXIT_OK 57 ;; 58 59*) 60 echo "Usage: $0 { start | stop }" 61 exit 1 62 ;; 63esac 64 65interface=$2 66 67# If boot variables are not set, set variables we use 68[ -z "$_INIT_UTS_NODENAME" ] && _INIT_UTS_NODENAME=`/usr/bin/uname -n` 69 70# 71# This function takes two file names and the file mode as input. The two 72# files are compared for differences (using cmp(1)) and if different, the 73# second file is over written with the first. A chmod is done with the file 74# mode passed in. If the files are equal, the first file passed 75# in (the /tmp file) is deleted. 76# 77mv_file () 78{ 79 /usr/bin/cmp -s $1 $2 80 if [ $? -eq 1 ]; then 81 /usr/bin/mv $1 $2 82 # 83 # The umask during boot is configurable, which requires 84 # explicit setting of file permission modes when we 85 # create files. 86 # 87 /usr/bin/chmod $3 $2 88 else 89 /usr/bin/rm $1 90 fi 91} 92 93# 94# This function takes a DHCP parameter (as defined in /etc/dhcp/inittab) 95# and returns the value for that parameter returned by the DHCP server. 96# If the global 'interface' is defined, it will request the value learned 97# on that interface, else it will request the value learned on the primary 98# interface. 99# 100get_dhcp_var () 101{ 102 if [ -n "$interface" ]; then 103 /sbin/dhcpinfo -i $interface $1 104 else 105 /sbin/dhcpinfo $1 106 fi 107} 108 109# 110# This function returns true if the string "# Added by DHCP$" occurs in 111# the passed-in file, false otherwise. 112# 113dhcp_edits () 114{ 115 /usr/bin/grep '# Added by DHCP$' $1 >/dev/null 2>&1 116 return $? 117} 118 119# 120# update_resolv() 121# Go through /etc/resolv.conf and replace any existing domain or 122# nameserver entries with new ones derived from DHCP. Note that 123# it is important to preserve order of domain entries vs. search 124# entries; the search entries are reserved for administrator 125# customization and if placed after the domain entry will override 126# it. See resolv.conf(4). 127# 128# The first arg should be the dns servers string, the second 129# should be the dns domain. 130# 131update_resolv () 132{ 133 dnsservers=$1 134 dnsdomain=$2 135 136 if [ ! -f /etc/resolv.conf ]; then 137 /usr/bin/touch /etc/resolv.conf 138 fi 139 export dnsservers dnsdomain 140 /usr/bin/nawk </etc/resolv.conf >/tmp/resolv.conf.$$ ' 141 function writedomain() { 142 if (updated == 0) { 143 # Use only first domain, not a search list 144 split(ENVIRON["dnsdomain"], d) 145 if(length(d[1]) != 0) 146 printf("domain %s\n", d[1]) 147 } 148 ++updated 149 } 150 $1 == "domain" { writedomain(); next } 151 $1 != "nameserver" { print $0 } 152 END { 153 writedomain() 154 n = split(ENVIRON["dnsservers"], s) 155 for (i = 1; i <= n; ++i) 156 printf("nameserver %s\n", s[i]) 157 }' 158 unset dnsservers dnsdomain 159 mv_file /tmp/resolv.conf.$$ /etc/resolv.conf 644 160} 161 162# 163# update_nss() 164# This routine takes as a parameter, the name of the respective policy 165# to change in the nsswitch.conf (hosts or ipnodes) to update with dns. 166# 167update_nss () 168{ 169 policy=$1; 170 # Add dns to the nsswitch file, if it isn't already there. 171 /usr/bin/awk ' $1 ~ /^'${policy}':/ { 172 n = split($0, a); 173 newl = a[1]; 174 if ($0 !~ /dns/) { 175 printf("#%s # Commented out by DHCP\n", $0); 176 updated = 0; 177 for (i = 2; i <= n; i++) { 178 if (updated == 0 && index(a[i], "[") == 1) { 179 newl = newl" dns"; 180 updated++; 181 } 182 newl = newl" "a[i]; 183 } 184 if (updated == 0) { 185 newl = newl" dns"; 186 updated++; 187 } 188 if (updated != 0) 189 newl = newl" # Added by DHCP"; 190 else 191 newl = $0; 192 printf("%s\n", newl); 193 } else 194 printf("%s\n", $0); 195 } $1 !~ /^'${policy}':/ { printf("%s\n", $0); }' /etc/nsswitch.conf \ 196 >/tmp/nsswitch.conf.$$ 197 198 mv_file /tmp/nsswitch.conf.$$ /etc/nsswitch.conf 644 199} 200 201# 202# Remove any lines with the "# Added by DHCP" tag from /etc/nsswitch.conf; 203# also uncomment hosts and ipnodes entries which were previously commented 204# out by this script. 205# 206cleanup_nss () 207{ 208 /usr/bin/sed \ 209 -e '/# Added by DHCP$/d' \ 210 -e 's/^\(#hosts:\)\(.*[^#]\)\(#.*\)$/hosts: \2/' \ 211 -e 's/^\(#ipnodes:\)\(.*[^#]\)\(#.*\)$/ipnodes: \2/' \ 212 /etc/nsswitch.conf >/tmp/nsswitch.conf.$$ 213 214 mv_file /tmp/nsswitch.conf.$$ /etc/nsswitch.conf 644 215} 216 217# 218# Remove any lines with the "# Added by DHCP" tag from /etc/inet/hosts. 219# 220cleanup_hosts () 221{ 222 /usr/bin/nawk '{ 223 if (index($0, "# Added by DHCP") == 0 || 224 $1 == "127.0.0.1" || $1 == "::1") { 225 print $0 226 } 227 }' /etc/inet/hosts > /tmp/hosts.$$ 228 mv_file /tmp/hosts.$$ /etc/inet/hosts 444 229} 230 231# 232# If our network configuration strategy is DHCP, check for DNS 233# configuration parameters obtained from the DHCP server. 234# 235# Script execution starts here. 236# 237smf_netstrategy 238 239if [ "$_INIT_NET_STRATEGY" = "dhcp" ]; then 240 dnsservers=`get_dhcp_var DNSserv` 241 dnsdomain=`get_dhcp_var DNSdmain` 242else 243 dnsservers="" 244 dnsdomain="" 245fi 246 247if [ -n "$dnsservers" ]; then 248 # 249 # add settings retrieved from dhcp server to /etc/resolv.conf 250 # 251 update_resolv "$dnsservers" "$dnsdomain" 252 253 # 254 # Add dns to the nsswitch file, if it isn't already there. 255 # 256 update_nss hosts 257 update_nss ipnodes 258 259elif dhcp_edits /etc/nsswitch.conf; then 260 # If we added DNS to the hosts and ipnodes 261 # policy in the nsswitch, remove it. 262 cleanup_nss 263fi 264 265if dhcp_edits /etc/inet/hosts; then 266 # Clean up any old DHCP-added entries 267 # (except loopback) in the hosts file. 268 cleanup_hosts 269fi 270 271