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
36 NWAM_FMRI="svc:/network/physical:nwam"
37
38 case "$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 ;;
63 esac
64
65 interface=$2
66
67 # If boot variables are not set, set variables we use
68 [ -z "$_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 #
77 mv_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 $1
90 fi
91 }
92
93 #
94 # This function takes a DHCP parameter (as defined in /etc/dhcp/inittab)
95 # and returns the value for that parameter returned by the DHCP server.
96 # If the global 'interface' is defined, it will request the value learned
97 # on that interface, else it will request the value learned on the primary
98 # interface.
99 #
100 get_dhcp_var ()
101 {
102 if [ -n "$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 #
113 dhcp_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 #
131 update_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 #
167 update_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 #
206 cleanup_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 #
220 cleanup_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 #
237 smf_netstrategy
238
239 if [ "$_INIT_NET_STRATEGY" = "dhcp" ]; then
240 dnsservers=`get_dhcp_var DNSserv`
241 dnsdomain=`get_dhcp_var DNSdmain`
242 else
243 dnsservers=""
244 dnsdomain=""
245 fi
246
247 if [ -n "$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
259 elif 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
263 fi
264
265 if dhcp_edits /etc/inet/hosts; then
266 # Clean up any old DHCP-added entries
267 # (except loopback) in the hosts file.
268 cleanup_hosts
269 fi
270