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#!/sbin/sh
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#
#
# Copyright 2010 Sun Microsystems, Inc. All rights reserved.
# Use is subject to license terms.
#
#
# This is third phase of TCP/IP startup/configuration. This script
# runs after the NIS startup script. We run things here that may
# depend on NIS maps.
#
. /lib/svc/share/smf_include.sh
. /lib/svc/share/net_include.sh
NWAM_FMRI="svc:/network/physical:nwam"
case "$1" in
'start')
#
# In a shared-IP zone we need this service to be up, but all of the
# work it tries to do is irrelevant (and will actually lead to the
# service failing if we try to do it), so just bail out.
# In the global zone and exclusive-IP zones we proceed.
#
smf_configure_ip || exit $SMF_EXIT_OK
#
# If nwam is enabled, the nwam service will handle the tasks performed
# by this service, so just bail out.
#
service_is_enabled $NWAM_FMRI && exit $SMF_EXIT_OK
;; # fall through -- rest of script is the initialization code
'stop')
exit $SMF_EXIT_OK
;;
*)
echo "Usage: $0 { start | stop }"
exit 1
;;
esac
interface=$2
# If boot variables are not set, set variables we use
[ -z "$_INIT_UTS_NODENAME" ] && _INIT_UTS_NODENAME=`/usr/bin/uname -n`
#
# This function takes two file names and the file mode as input. The two
# files are compared for differences (using cmp(1)) and if different, the
# second file is over written with the first. A chmod is done with the file
# mode passed in. If the files are equal, the first file passed
# in (the /tmp file) is deleted.
#
mv_file ()
{
/usr/bin/cmp -s $1 $2
if [ $? -eq 1 ]; then
/usr/bin/mv $1 $2
#
# The umask during boot is configurable, which requires
# explicit setting of file permission modes when we
# create files.
#
/usr/bin/chmod $3 $2
else
/usr/bin/rm $1
fi
}
#
# This function takes a DHCP parameter (as defined in /etc/dhcp/inittab)
# and returns the value for that parameter returned by the DHCP server.
# If the global 'interface' is defined, it will request the value learned
# on that interface, else it will request the value learned on the primary
# interface.
#
get_dhcp_var ()
{
if [ -n "$interface" ]; then
/sbin/dhcpinfo -i $interface $1
else
/sbin/dhcpinfo $1
fi
}
#
# This function returns true if the string "# Added by DHCP$" occurs in
# the passed-in file, false otherwise.
#
dhcp_edits ()
{
/usr/bin/grep '# Added by DHCP$' $1 >/dev/null 2>&1
return $?
}
#
# update_resolv()
# Go through /etc/resolv.conf and replace any existing domain or
# nameserver entries with new ones derived from DHCP. Note that
# it is important to preserve order of domain entries vs. search
# entries; the search entries are reserved for administrator
# customization and if placed after the domain entry will override
# it. See resolv.conf(5).
#
# The first arg should be the dns servers string, the second
# should be the dns domain.
#
update_resolv ()
{
dnsservers=$1
dnsdomain=$2
if [ ! -f /etc/resolv.conf ]; then
/usr/bin/touch /etc/resolv.conf
fi
export dnsservers dnsdomain
/usr/bin/nawk </etc/resolv.conf >/tmp/resolv.conf.$$ '
function writedomain() {
if (updated == 0) {
# Use only first domain, not a search list
split(ENVIRON["dnsdomain"], d)
if(length(d[1]) != 0)
printf("domain %s\n", d[1])
}
++updated
}
$1 == "domain" { writedomain(); next }
$1 != "nameserver" { print $0 }
END {
writedomain()
n = split(ENVIRON["dnsservers"], s)
for (i = 1; i <= n; ++i)
printf("nameserver %s\n", s[i])
}'
unset dnsservers dnsdomain
mv_file /tmp/resolv.conf.$$ /etc/resolv.conf 644
}
#
# update_nss()
# This routine takes as a parameter, the name of the respective policy
# to change in the nsswitch.conf (hosts or ipnodes) to update with dns.
#
update_nss ()
{
policy=$1;
# Add dns to the nsswitch file, if it isn't already there.
/usr/bin/awk ' $1 ~ /^'${policy}':/ {
n = split($0, a);
newl = a[1];
if ($0 !~ /dns/) {
printf("#%s # Commented out by DHCP\n", $0);
updated = 0;
for (i = 2; i <= n; i++) {
if (updated == 0 && index(a[i], "[") == 1) {
newl = newl" dns";
updated++;
}
newl = newl" "a[i];
}
if (updated == 0) {
newl = newl" dns";
updated++;
}
if (updated != 0)
newl = newl" # Added by DHCP";
else
newl = $0;
printf("%s\n", newl);
} else
printf("%s\n", $0);
} $1 !~ /^'${policy}':/ { printf("%s\n", $0); }' /etc/nsswitch.conf \
>/tmp/nsswitch.conf.$$
mv_file /tmp/nsswitch.conf.$$ /etc/nsswitch.conf 644
}
#
# Remove any lines with the "# Added by DHCP" tag from /etc/nsswitch.conf;
# also uncomment hosts and ipnodes entries which were previously commented
# out by this script.
#
cleanup_nss ()
{
/usr/bin/sed \
-e '/# Added by DHCP$/d' \
-e 's/^\(#hosts:\)\(.*[^#]\)\(#.*\)$/hosts: \2/' \
-e 's/^\(#ipnodes:\)\(.*[^#]\)\(#.*\)$/ipnodes: \2/' \
/etc/nsswitch.conf >/tmp/nsswitch.conf.$$
mv_file /tmp/nsswitch.conf.$$ /etc/nsswitch.conf 644
}
#
# Remove any lines with the "# Added by DHCP" tag from /etc/inet/hosts.
#
cleanup_hosts ()
{
/usr/bin/nawk '{
if (index($0, "# Added by DHCP") == 0 ||
$1 == "127.0.0.1" || $1 == "::1") {
print $0
}
}' /etc/inet/hosts > /tmp/hosts.$$
mv_file /tmp/hosts.$$ /etc/inet/hosts 444
}
#
# If our network configuration strategy is DHCP, check for DNS
# configuration parameters obtained from the DHCP server.
#
# Script execution starts here.
#
smf_netstrategy
if [ "$_INIT_NET_STRATEGY" = "dhcp" ]; then
dnsservers=`get_dhcp_var DNSserv`
dnsdomain=`get_dhcp_var DNSdmain`
else
dnsservers=""
dnsdomain=""
fi
if [ -n "$dnsservers" ]; then
#
# add settings retrieved from dhcp server to /etc/resolv.conf
#
update_resolv "$dnsservers" "$dnsdomain"
#
# Add dns to the nsswitch file, if it isn't already there.
#
update_nss hosts
update_nss ipnodes
elif dhcp_edits /etc/nsswitch.conf; then
# If we added DNS to the hosts and ipnodes
# policy in the nsswitch, remove it.
cleanup_nss
fi
if dhcp_edits /etc/inet/hosts; then
# Clean up any old DHCP-added entries
# (except loopback) in the hosts file.
cleanup_hosts
fi
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