--- /dev/null
+#!/bin/sh
+# dhcpcd - DHCP client daemon
+# Copyright 2006-2008 Roy Marples <roy@marples.name>
+# All rights reserved
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+
+# OK, this is dhcpcd.sh which is very similar to dhclient-script.
+# Some differences :)
+# 1) The dhcpcd binary configures the interface and routes.
+# This is so that one script (hopefully!) fits all platforms as the
+# userland tools vary too much, especially on Linux.
+# 2) We also ship with hooks dir support.
+# This is meant to be used by applications to install into - the
+# user is meant to use the top hook script.
+# 3) We support all reasons and variables that dhclient-script does, plus
+# extra reasons TEST, INFORM and IPV4LL.
+
+# FIXME Move the above into a dhcpcd.sh man page :)
+
+do_hooks()
+{
+ local x= r=0
+ for x in @SYSCONFDIR@/dhcpcd-"$1"-hook.d/* @SYSCONFDIR@/dhcpcd-"$1"-hook; do
+ if [ -e "${x}" ]; then
+ . "${x}"
+ r=$((${r} + $?))
+ fi
+ done
+ return ${r}
+}
+
+# Try and locate a service pidfile
+service_pid()
+{
+ local service="$1" x=
+ for x in "${service}".pid \
+ "${service}"/pid \
+ "${service}"/"${service}".pid;
+ do
+ if [ -s "/var/run/${x}" ]; then
+ echo "/var/run/${x}"
+ return 0
+ fi
+ done
+ return 1
+}
+
+# Try and detect how to handle services so we're pretty
+# platform independant
+do_service()
+{
+ local service="$1" action="$2"
+ shift; shift
+
+ # If restarting check if service is running or not if we can
+ if [ "${action}" = "restart" ]; then
+ pidfile=$(service_pid "${service}")
+ [ -s "${pidfile}" ] || return 0
+ kill -0 $(cat "${pidfile}") 2>/dev/null || return 0
+ fi
+
+ if type rc-service >/dev/null 2>/dev/null; then
+ rc-service "${service}" -- --nodeps "${action}" "$@"
+ elif [ -x /sbin/service ]; then
+ service "${service}" "${action}" "$@"
+ elif [ -x /etc/init.d/"${service}" -a -x /sbin/runscript ]; then
+ /etc/init.d/"${service}" --quiet --nodeps "${action}" "$@"
+ elif [ -x /etc/init.d/"${service}" ]; then
+ /etc/init.d/"${service}" "${action}" "$@"
+ elif [ -x /etc/rc.d/"${service}" ]; then
+ /etc/rc.d/"${service}" "${action}" "$@"
+ elif [ -x /etc/rc.d/rc."${service}" ]; then
+ /etc/rc.d/rc."${service}" "${action}" "$@"
+ else
+ echo "Don't know how to interact with services on this platform" >&2
+ return 1
+ fi
+}
+
+yesno()
+{
+ [ -z "$1" ] && return 2
+
+ case "$1" in
+ [Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1) return 0;;
+ [Nn][Oo]|[Ff][Aa][Ll][Ss][Ee]|[Oo][Ff][Ff]|0) return 1;;
+ esac
+ return 2
+}
+
+save_conf()
+{
+ if [ -e "$1" ]; then
+ rm -f "$1"-pre."${interface}"
+ mv -f "$1" "$1"-pre."${interface}"
+ fi
+}
+
+restore_conf()
+{
+ [ -e "$1"-pre."${interface}" ] || return 1
+ rm -f "$1"
+ mv -f "$1"-pre."${interface}" "$1"
+}
+
+set_mtu()
+{
+ if [ -n "${new_mtu}" ]; then
+ ifconfig "${interface}" mtu "${new_mtu}"
+ fi
+}
+
+make_nis_conf() {
+ [ -z "${new_nis_domain}" -a -z "${new_nis_servers}" ] && return 0
+ local cf=/etc/yp.conf."${interface}" prefix= x= pidfile=
+ echo "${signature}" > "${cf}"
+ if [ -n "${new_nis_domain}" ]; then
+ domainname "${new_nis_domain}"
+ if [ -n "${new_nis_server}" ]; then
+ prefix="domain ${new_nis_domain} server "
+ else
+ echo "domain ${new_nis_domain} broadcast" >> "${cf}"
+ fi
+ else
+ prefix="ypserver "
+ fi
+ for x in ${new_nis_servers}; do
+ echo "${prefix}${x}" >> "${cf}"
+ done
+ save_conf /etc/yp.conf
+ mv -f "${cf}" /etc/yp.conf
+ pidfile="$(service_pidfile ypbind)"
+ if [ -s "${pidfile}" ]; then
+ kill -HUP "${pidfile}"
+ fi
+}
+
+restore_nis_conf()
+{
+ [ -n "${old_nis_domain}" ] && domainname ""
+ restore_conf /etc/yp.conf || return 0
+ pidfile="$(service_pidfile ypbind)"
+ if [ -s "${pidfile}" ]; then
+ kill -HUP "${pidfile}"
+ fi
+}
+
+make_ntp_conf()
+{
+ [ -z "${new_ntp_servers}" ] && return 0
+ local cf=/etc/ntp.conf."${interface}" x=
+ echo "${signature}" > "${cf}"
+ echo "restrict default noquery notrust nomodify" >> "${cf}"
+ echo "restrict 127.0.0.1" >> "${cf}"
+ for x in ${new_ntp_servers}; do
+ echo "restrict ${x} nomodify notrap noquery" >> "${cf}"
+ echo "server ${x}" >> "${cf}"
+ done
+ if [ ! -e /etc/ntp.conf ]; then
+ true
+ elif type cmp >/dev/null 2>&1; then
+ cmp -s /etc/ntp.conf "${cf}"
+ elif type diff >/dev/null 2>&1; then
+ diff -q /etc/ntp.conf "${cf}" >/dev/null
+ else
+ false
+ fi
+ if [ $? = 0 ]; then
+ rm -f "${cf}"
+ else
+ save_conf /etc/ntp.conf
+ mv -f "${cf}" /etc/ntp.conf
+ do_service ntp restart
+ fi
+}
+
+restore_ntp_conf()
+{
+ restore_conf /etc/ntp.conf || return 0
+ do_service ntp restart
+}
+
+make_resolv_conf()
+{
+ if [ -z "${new_domain_name_servers}" -a \
+ -z "${new_domain_name}" -a \
+ -z "${new_domain_search}" ]; then
+ return 0
+ fi
+ local x= conf="${signature}\n"
+ if [ -n "${new_domain_search}" ]; then
+ conf="${conf}search ${new_domain_search}\n"
+ elif [ -n "${new_domain_name}" ]; then
+ conf="${conf}search ${new_domain_name}\n"
+ fi
+ for x in ${new_domain_name_servers}; do
+ conf="${conf}nameserver ${x}\n"
+ done
+ if type resolvconf >/dev/null 2>&1; then
+ printf "${conf}" | resolvconf -a "${interface}"
+ else
+ save_conf /etc/resolv.conf
+ printf "${conf}" > /etc/resolv.conf
+ do_service nscd restart
+ fi
+}
+
+restore_resolv_conf()
+{
+ if type resolvconf >/dev/null 2>&1; then
+ resolvconf -d "${interface}" -f
+ else
+ restore_conf /etc/resolv.conf || return 0
+ do_service nscd restart
+ fi
+}
+
+need_hostname()
+{
+ case "$(hostname)" in
+ ""|"(none)"|localhost) return 0;;
+ esac
+ return 1
+}
+
+lookup_hostname()
+{
+ if type host >/dev/null 2>&1; then
+ host "${new_ip_address}" | \
+ sed 's/.* domain name pointer \(.*\)./\1/'
+ elif type dig >/dev/null 2>&1; then
+ dig +short -x "${new_ip_address}" | sed 's/\.$//'
+ else
+ return 1
+ fi
+}
+
+set_hostname()
+{
+ if need_hostname || [ -n "${oldhostname}" ]; then
+ local name="${new_hostname}"
+ [ -z "${name}" ] && name="$(lookup_hostname)"
+ [ -n "${name}" ] && hostname "${name}"
+ fi
+}
+
+run_test()
+{
+ env | grep "^\(interface\|reason\)="
+ env | grep "^\(new_\|old_\)" | sort
+}
+
+run_reason()
+{
+ local r=0
+ case "${reason}" in
+ TEST)
+ run_test
+ r=$?
+ ;;
+ BOUND|INFORM|REBIND|REBOOT|RENEW|TIMEOUT)
+ make_mtu
+ r=$((${r} + $?))
+ make_resolv_conf
+ r=$((${r} + $?))
+ set_hostname
+ r=$((${r} + $?))
+ make_nis_conf
+ r=$((${r} + $?))
+ make_ntp_conf
+ r=$((${r} + $?))
+ ;;
+ EXPIRE|FAIL|IPV4LL|RELEASE|STOP)
+ restore_resolv_conf
+ r=$((${r} + $?))
+ restore_nis_conf
+ r=$((${r} + $?))
+ restore_ntp_conf
+ r=$((${r} + $?))
+ ;;
+ *)
+ echo "unsupported reason ${reason}" >&2
+ return 1
+ ;;
+ esac
+ return ${r}
+}
+
+signature="# Generated by dhcpcd for ${interface}"
+
+# We should do something with exit codes really
+do_hooks enter
+run_reason
+do_hooks exit
projects / thirdparty / dhcpcd.git / commitdiff
