From c1ab4f157d28f3f929eeed198ea57be36740d2c3 Mon Sep 17 00:00:00 2001
From: "David E. O'Brien" <obrien@FreeBSD.org>
Date: Mon, 22 Apr 2002 21:42:18 +0000
Subject: [PATCH] Utilize dhcp information in the kernel environment if we
 don't have hostname and DNS information already.

Submitted by:	Danny Braniss <danny@cs.huji.ac.il>
---
 etc/rc.d/initdiskless | 21 ++++++++++++++++++++-
 etc/rc.diskless1      | 21 ++++++++++++++++++++-
 etc/rc.initdiskless   | 21 ++++++++++++++++++++-
 3 files changed, 60 insertions(+), 3 deletions(-)

diff --git a/etc/rc.d/initdiskless b/etc/rc.d/initdiskless
index cc1562d24351..4eb37fa4c786 100644
--- a/etc/rc.d/initdiskless
+++ b/etc/rc.d/initdiskless
@@ -92,6 +92,12 @@ for i in ${iflist} ; do
 done
 echo "Interface ${bootp_ifc} IP-Address ${bootp_ipa} Broadcast ${bootp_ipbca}"
 
+if [ -z "`hostname -s`" ]; then
+        hostname=`kenv dhcp.host-name`
+        hostname $hostname
+	echo "Hostname is $hostname"
+fi
+
 if [ -d /conf/default/etc ]; then
 	mount_md 4096 /etc 0
 	chkerr $? "MFS mount on /etc"
@@ -109,12 +115,25 @@ fi
 # This way we have some flexibility to handle clusters of machines on
 # separate subnets.
 
-for i in ${bootp_ipbca} ${bootp_ipa} ; do
+for i in ${bootp_ipbca} ${bootp_ipa} ${hostname} ; do
 	if [ -d /conf/${i}/etc ]; then
 		cp -Rp /conf/${i}/etc/* /etc
 	fi
 done
 
+#
+# if the info is available via dhcp/kenv
+# build the resolv.conf
+#
+if [ ! -e /etc/resolv.conf ]; then
+        echo domain `kenv dhcp.domain-name` > /etc/resolv.conf
+
+        set `kenv dhcp.domain-name-servers`
+        for ns in `IFS=','; echo $*`; do
+                echo nameserver $ns >> /etc/resolv.conf;
+        done
+fi
+
 # Tell /etc/rc to run the specified script after it does its mounts but
 # before it does anything else.
 #
diff --git a/etc/rc.diskless1 b/etc/rc.diskless1
index cc1562d24351..4eb37fa4c786 100644
--- a/etc/rc.diskless1
+++ b/etc/rc.diskless1
@@ -92,6 +92,12 @@ for i in ${iflist} ; do
 done
 echo "Interface ${bootp_ifc} IP-Address ${bootp_ipa} Broadcast ${bootp_ipbca}"
 
+if [ -z "`hostname -s`" ]; then
+        hostname=`kenv dhcp.host-name`
+        hostname $hostname
+	echo "Hostname is $hostname"
+fi
+
 if [ -d /conf/default/etc ]; then
 	mount_md 4096 /etc 0
 	chkerr $? "MFS mount on /etc"
@@ -109,12 +115,25 @@ fi
 # This way we have some flexibility to handle clusters of machines on
 # separate subnets.
 
-for i in ${bootp_ipbca} ${bootp_ipa} ; do
+for i in ${bootp_ipbca} ${bootp_ipa} ${hostname} ; do
 	if [ -d /conf/${i}/etc ]; then
 		cp -Rp /conf/${i}/etc/* /etc
 	fi
 done
 
+#
+# if the info is available via dhcp/kenv
+# build the resolv.conf
+#
+if [ ! -e /etc/resolv.conf ]; then
+        echo domain `kenv dhcp.domain-name` > /etc/resolv.conf
+
+        set `kenv dhcp.domain-name-servers`
+        for ns in `IFS=','; echo $*`; do
+                echo nameserver $ns >> /etc/resolv.conf;
+        done
+fi
+
 # Tell /etc/rc to run the specified script after it does its mounts but
 # before it does anything else.
 #
diff --git a/etc/rc.initdiskless b/etc/rc.initdiskless
index cc1562d24351..4eb37fa4c786 100644
--- a/etc/rc.initdiskless
+++ b/etc/rc.initdiskless
@@ -92,6 +92,12 @@ for i in ${iflist} ; do
 done
 echo "Interface ${bootp_ifc} IP-Address ${bootp_ipa} Broadcast ${bootp_ipbca}"
 
+if [ -z "`hostname -s`" ]; then
+        hostname=`kenv dhcp.host-name`
+        hostname $hostname
+	echo "Hostname is $hostname"
+fi
+
 if [ -d /conf/default/etc ]; then
 	mount_md 4096 /etc 0
 	chkerr $? "MFS mount on /etc"
@@ -109,12 +115,25 @@ fi
 # This way we have some flexibility to handle clusters of machines on
 # separate subnets.
 
-for i in ${bootp_ipbca} ${bootp_ipa} ; do
+for i in ${bootp_ipbca} ${bootp_ipa} ${hostname} ; do
 	if [ -d /conf/${i}/etc ]; then
 		cp -Rp /conf/${i}/etc/* /etc
 	fi
 done
 
+#
+# if the info is available via dhcp/kenv
+# build the resolv.conf
+#
+if [ ! -e /etc/resolv.conf ]; then
+        echo domain `kenv dhcp.domain-name` > /etc/resolv.conf
+
+        set `kenv dhcp.domain-name-servers`
+        for ns in `IFS=','; echo $*`; do
+                echo nameserver $ns >> /etc/resolv.conf;
+        done
+fi
+
 # Tell /etc/rc to run the specified script after it does its mounts but
 # before it does anything else.
 #