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|
#!/sbin/runscript
# Copyright (c) 2004-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# Contributed by Roy Marples (uberlord@gentoo.org)
# Many thanks to Aron Griffis (agriffis@gentoo.org)
# for help, ideas and patches
#NB: Config is in /etc/conf.d/net
# For pcmcia users. note that pcmcia must be added to the same
# runlevel as the net.* script that needs it.
depend() {
need localmount
use coldplug pcmcia usb isdn wlan
# Load any custom depend functions for the given interface
# For example, br0 may need eth0 and eth1
local iface="${myservice##*.}"
[[ $( type -t depend_${iface} ) == "function" ]] && depend_${iface}
return 0
}
# Define where our modules are
MODULES_DIR="/lib/rcscripts/net.modules.d"
# Some defaults
background="${background:-no}"
# Load some functions shared between ourselves and our dhcp helpers
source "${MODULES_DIR}/helpers.d/functions"
# Make some wrappers to fudge after/before/need/use depend flags.
# These are callbacks so MODULE will be set.
after() {
local x="$*"
[[ $# -gt 1 ]] && x=$( echo -e "${x// /\n}" | sort | xargs )
eval "${MODULE}_after() { echo \"$x\"; }"
}
before() {
local x="$*"
[[ $# -gt 1 ]] && x=$( echo -e "${x// /\n}" | sort | xargs )
eval "${MODULE}_before() { echo \"$x\"; }"
}
need() {
local x="$*"
[[ $# -gt 1 ]] && x=$( echo -e "${x// /\n}" | sort | xargs )
eval "${MODULE}_need() { echo \"$x\"; }"
}
installed() {
local x="$*"
[[ $# -gt 1 ]] && x=$( echo -e "${x// /\n}" | sort | xargs )
# We deliberately misspell this as _installed will probably be used
# at some point
eval "${MODULE}_instlled() { echo \"$x\"; }"
}
sort() {
LC_ALL=C /bin/sort "$@"
}
# void go_background(void)
#
# Setup for backgrounding network script
go_background() {
einfo "Backgrounding ..."
mark_service_inactive "net.${iface}"
exit 0
}
# bool module_load_minimum(char *module)
#
# Does the minimum checking on a module - even when forcing
module_load_minimum() {
local f="$1" MODULE="${1##*/}"
if [[ ! -f ${f} ]]; then
eerror "${f} does not exist"
return 1
fi
if ! source "${f}" ; then
eerror "${MODULE} failed a sanity check"
return 1
fi
for f in check_installed provides check_depends depend; do
[[ $( type -t "${MODULE}_${f}" ) == "function" ]] && continue
eerror "${MODULE} does not support the required function ${f}"
return 1
done
return 0
}
# bool modules_load_auto()
#
# Load and check each module for sanity
# If the module is not installed, the functions are to be removed
modules_load_auto() {
local i j
# Populate the MODULES array
# Basically we treat evey file in ${MODULES_DIR} as a module
MODULES=( $( cd "${MODULES_DIR}" ; ls ) )
j="${#MODULES[@]}"
for (( i=0; i<j; i++ )); do
MODULES[i]="${MODULES_DIR}/${MODULES[i]}"
[[ ! -f ${MODULES[i]} ]] && unset MODULES[i]
done
MODULES=( "${MODULES[@]}" )
# Each of these sources into the global namespace, so it's
# important that module functions and variables are prefixed with
# the module name, for example iproute2_
j="${#MODULES[@]}"
loaded_interface=false
for (( i=0; i<j; i++ )); do
if [[ ${MODULES[i]##*/} == "interface" ]]; then
eerror "interface is a reserved name - cannot load a module called interface"
return 1
fi
(
u=0;
module_load_minimum "${MODULES[i]}" || u=1;
[[ ${u} == 0 ]] && ${MODULES[i]##*/}_check_installed false || u=1;
exit "${u}";
)
if [[ $? == 0 ]]; then
source "${MODULES[i]}"
MODULES[i]="${MODULES[i]##*/}"
else
unset MODULES[i]
fi
done
MODULES=( "${MODULES[@]}" )
return 0
}
# bool modules_check_installed(void)
#
# Ensure that all modules have the required modules loaded
# This enables us to remove modules from the MODULES array
# Whilst other modules can still explicitly call them
# One example of this is essidnet which configures network
# settings for the specific ESSID connected to as the user
# may be using a daemon to configure wireless instead of our
# iwconfig module
modules_check_installed() {
local i j missingdeps nmods="${#MODULES[@]}"
for (( i=0; i<nmods; i++ )); do
[[ $( type -t "${MODULES[i]}_instlled" ) != "function" ]] && continue
for j in $( ${MODULES[i]}_instlled ); do
missingdeps=true
if [[ $( type -t "${j}_check_installed" ) == "function" ]]; then
${j}_check_installed && missingdeps=false
fi
${missingdeps} && unset MODULES[i] && unset PROVIDES[i] && break
done
done
MODULES=( "${MODULES[@]}" )
PROVIDES=( "${PROVIDES[@]}" )
}
# bool modules_check_user(void)
modules_check_user() {
local -a umods
local i j k l nmods="${#MODULES[@]}"
# Has the interface got any specific modules?
eval umods=( \"\$\{modules_${iface}\[@\]\}\" )
# Global setting follows interface-specific setting
umods=( "${umods[@]}" "${modules[@]}" )
# Add our preferred modules
local -a pmods=( "iproute2" "dhcpcd" "iwconfig" "netplugd" )
umods=( "${umods[@]}" "${pmods[@]}" )
# First we strip any modules that conflict from user settings
# So if the user specifies pump then we don't use dhcpcd
for (( i=0; i<${#umods[@]}; i++ )); do
# Some users will inevitably put "dhcp" in their modules
# list. To keep users from screwing up their system this
# way, ignore this setting so that the default dhcp
# module will be used.
[[ ${umods[i]} == "dhcp" ]] && continue
# We remove any modules we explicitly don't want
if [[ ${umods[i]} == !* ]]; then
for (( j=0; j<nmods; j++ )); do
[[ -z ${MODULES[j]} ]] && continue
if [[ ${umods[i]:1} == "${MODULES[j]}" \
|| ${umods[i]:1} == "${PROVIDES[j]}" ]]; then
# We may need to setup a class wrapper for it even though
# we don't use it directly
# However, we put it into an array and wrap later as
# another module may provide the same thing
${MODULES[j]}_check_installed \
&& WRAP_MODULES=(
"${WRAP_MODULES[@]}"
"${MODULES[j]} ${PROVIDES[j]}"
)
unset MODULES[j]
unset PROVIDES[j]
break
fi
done
continue
fi
if [[ $( type -t "${umods[i]}_provides" ) != "function" ]]; then
# If the module is one of our preferred modules, then
# ignore this error; whatever is available will be
# used instead.
(( i < ${#umods[@]} - ${#pmods[@]} )) || continue
# The function may not exist because the modules software is
# not installed. Load the module and report its error
if [[ -e "${MODULES_DIR}/${umods[i]}" ]]; then
source "${MODULES_DIR}/${umods[i]}"
${umods[i]}_check_installed true
else
eerror "The module \"${umods[i]}\" does not exist"
fi
return 1
fi
mod=$( ${umods[i]}_provides )
for (( j=0; j<nmods; j++ )); do
[[ -z ${MODULES[j]} ]] && continue
if [[ ${PROVIDES[j]} == "${mod}" && ${umods[i]} != "${MODULES[j]}" ]]; then
# We don't have a match - now ensure that we still provide an
# alternative. This is to handle our preferred modules.
for (( l=0; l<nmods; l++ )); do
[[ ${l} == "${j}" || -z ${MODULES[l]} ]] && continue
if [[ ${PROVIDES[l]} == "${mod}" ]]; then
unset MODULES[j]
unset PROVIDES[j]
break
fi
done
fi
done
done
# Then we strip conflicting modules.
# We only need to do this for 3rd party modules that conflict with
# our own modules and the preferred list AND the user modules
# list doesn't specify a preference.
for (( i=0; i<nmods-1; i++ )); do
[[ -z ${MODULES[i]} ]] && continue
for (( j=i+1; j<nmods; j++)); do
[[ -z ${MODULES[j]} ]] && continue
[[ ${PROVIDES[i]} == "${PROVIDES[j]}" ]] \
&& unset MODULES[j] && unset PROVIDES[j]
done
done
MODULES=( "${MODULES[@]}" )
PROVIDES=( "${PROVIDES[@]}" )
return 0
}
# void modules_sort(void)
modules_sort() {
local -a modnums sort_history modafter modbefore
local i j k p changed_something nmods="${#MODULES[@]}"
# Sort our modules
# We do this by assigning numbers to each module
# We also assign modbefore and modafter so we don't
# shell out as much because it's expensive on CPU.
modnums=()
for (( i=0; i<nmods; i++ )); do
modnums[i]="${i}"
[[ $( type -t "${MODULES[i]}_after" ) == "function" ]] \
&& modafter[i]=$( ${MODULES[i]}_after )
[[ $( type -t "${MODULES[i]}_before" ) == "function" ]] \
&& modbefore[i]=$( ${MODULES[i]}_before )
done
# Then we swap numbers based on and after/before flags
# until we don't swap anymore. The sort_history array prevents
# the possibility of an infinite loop
sort_history[0]="${modnums[*]}"
for (( k=1; 1; k++ )); do
changed_something=false
for (( i=0; i<nmods; i++ )); do
for p in ${modafter[i]}; do
for (( j=0; j<nmods; j++ )); do
[[ ${p} != "${MODULES[j]}" && ${p} != "${PROVIDES[j]}" ]] \
&& continue
if [[ ${modnums[i]} -lt "${modnums[j]}" ]]; then
tmp="${modnums[i]}"
modnums[i]="${modnums[j]}"
modnums[j]="${tmp}"
changed_something=true
fi
done
done
for p in ${modbefore[i]}; do
for (( j=0; j<nmods; j++ )); do
[[ ${p} != "${MODULES[j]}" && ${p} != "${PROVIDES[j]}" ]] \
&& continue
if [[ ${modnums[i]} -gt "${modnums[j]}" ]]; then
tmp="${modnums[i]}"
modnums[i]="${modnums[j]}"
modnums[j]="${tmp}"
changed_something=true
fi
done
done
done
${changed_something} || break
# Make sure we aren't repeating a previous state
# First time through, k=1, k/2=0
sort_history[k]="${modnums[*]}"
if [[ ${sort_history[k]} == "${sort_history[k/2]}" ]]; then
eerror "Detected an infinite loop sorting modules; blundering ahead"
break
fi
done
# Finally we sort our modules in number order
um=""
for (( i=0; i<nmods; i++ )); do
um="${um}${modnums[i]} ${MODULES[i]} ${PROVIDES[i]}\n"
done
p=( $( echo -e "${um}" | sort -n | cut -d' ' -f2,3 ) )
MODULES=()
PROVIDES=()
j=0
for (( i=0; i<${#p[@]}; i+=2 )); do
MODULES[j]="${p[i]}"
PROVIDES[j]="${p[i+1]}"
(( j++ ))
done
}
# bool modules_check_depends(bool showprovides)
modules_check_depends() {
local showprovides="${1:-false}" nmods="${#MODULES[@]}" i j needmod
local missingdeps p interface=false
for (( i=0; i<nmods; i++ )); do
if [[ $( type -t "${MODULES[i]}_need" ) == "function" ]]; then
for needmod in $( ${MODULES[i]}_need ); do
missingdeps=true
for (( j=0; j<nmods; j++ )); do
if [[ ${needmod} == "${MODULES[j]}" \
|| ${needmod} == "${PROVIDES[j]}" ]]; then
missingdeps=false
break
fi
done
if ${missingdeps} ; then
eerror "${MODULES[i]} needs ${needmod} (dependency failure)"
return 1
fi
done
fi
${MODULES[i]}_check_depends || return 1
[[ ${PROVIDES[i]} == "interface" ]] && interface=true
if ${showprovides} ; then
[[ ${PROVIDES[i]} != "${MODULES[i]}" ]] \
&& veinfo "${MODULES[i]} provides ${PROVIDES[i]}"
fi
done
if ! ${interface} ; then
eerror "no interface module has been loaded"
return 1
fi
return 0
}
# bool modules_load(char *iface, bool starting)
#
# Loads the defined handler and modules for the interface
# Returns 0 on success, otherwise 1
modules_load() {
local iface="$1" starting="${2:-true}" MODULE p=false i j k
local -a x
local RC_INDENTATION="${RC_INDENTATION}"
local -a PROVIDES WRAP_MODULES
if [[ ${iface} != "lo" ]]; then
eval x=( \"\$\{modules_force_${iface}\[@\]\}\" )
[[ -n ${x} ]] && modules_force=( "${x[@]}" )
if [[ -n ${modules_force} ]]; then
ewarn "WARNING: You are forcing modules!"
ewarn "Do not complain or file bugs if things start breaking"
report=true
fi
fi
veinfo "Loading networking modules for ${iface}"
eindent
if [[ -z ${modules_force} ]]; then
modules_load_auto || return 1
else
j="${#modules_force[@]}"
for (( i=0; i<j; i++ )); do
module_load_minimum "${MODULES_DIR}/${modules_force[i]}" || return 1
${modules_force[i]}_check_installed || unset modules_force[i]
done
modules_force=( "${modules_force[@]}" )
# Strip any duplicate modules providing the same thing
j="${#modules_force[@]}"
for (( i=0; i<j-1; i++ )); do
[[ -z ${modules_force[i]} ]] && continue
for (( k=i+1; k<j; k++ )); do
[[ -z ${modules_force[k]} ]] && continue
[[ $( ${modules_force[i]}_provides ) \
== $( ${modules_force[k]}_provides ) ]] \
&& unset modules_force[k]
done
done
MODULES=( "${modules_force[@]}" )
fi
# We now buffer the _provides functions for a big speed boost
j="${#MODULES[@]}"
for (( i=0; i<j; i++ )); do
PROVIDES[i]=$( ${MODULES[i]}_provides )
done
if [[ -z ${modules_force[@]} ]]; then
if ${starting}; then
modules_check_user || return 1
fi
fi
# Setup class wrappers: interface_up -> iproute2_up, for example
j="${#MODULES[@]}"
for (( i=0; i<j; i++ )); do
function_wrap "${MODULES[i]}" "${PROVIDES[i]}"
# Now load our dependencies - we need to use the MODULE variable
# here as the after/before/need functions use it
if [[ -z ${modules_force[@]} ]]; then
MODULE="${MODULES[i]}"
${MODULE}_depend
fi
done
# Some modules may be installed, but not selected by user preference
# so we wrap these if needed
j="${#WRAP_MODULES[@]}"
for (( i=0; i<j; i++ )); do
function_wrap "${WRAP_MODULES[i]}"
done
if [[ -z ${modules_force[@]} ]]; then
modules_check_installed || return 1
modules_sort || return 1
fi
veinfo "modules: ${MODULES[@]}"
eindent
${starting} && p=true
modules_check_depends "${p}" || return 1
return 0
}
# bool iface_start(char *interface)
#
# iface_start is called from start. It's expected to start the base
# interface (for example "eth0"), aliases (for example "eth0:1") and to start
# VLAN interfaces (for example eth0.0, eth0.1). VLAN setup is accomplished by
# calling itself recursively.
iface_start() {
local iface="$1" mod config_counter="-1" x config_worked=false
local RC_INDENTATION="${RC_INDENTATION}"
local -a config fallback fallback_route conf a
local ifvar=$( bash_variable "$1" ) i j
# Try and work out a metric for the interface if we're on auto
eval x=\"\$\{metric_${ifvar}\}\"
if [[ -z ${x} ]]; then
if [[ ${RC_AUTO_INTERFACE} == "yes" ]]; then
eval "metric_${ifvar}=\""$( calculate_metric ${iface} )"\""
else
eval "metric_${ifvar}=0"
fi
fi
# pre Start any modules with
for mod in ${MODULES[@]}; do
if [[ $( type -t "${mod}_pre_start" ) == "function" ]]; then
${mod}_pre_start "${iface}" || { eend 1; return 1; }
fi
done
# We now expand the configuration parameters and pray that the
# fallbacks expand to the same number as config or there will be
# trouble!
eval a=( \"\$\{config_${ifvar}\[@\]\}\" )
for (( i=0; i<${#a[@]}; i++ )); do
local -a b=( $( expand_parameters "${a[i]}" ) )
config=( "${config[@]}" "${b[@]}" )
done
eval a=( \"\$\{fallback_${ifvar}\[@\]\}\" )
for (( i=0; i<${#a[@]}; i++ )); do
local -a b=( $( expand_parameters "${a[i]}" ) )
fallback=( "${fallback[@]}" "${b[@]}" )
done
# We don't expand routes
eval fallback_route=( \"\$\{fallback_route_${ifvar}\[@\]\}\" )
# We must support old configs
if [[ -z ${config} ]]; then
interface_get_old_config "${iface}" || return 1
if [[ -n ${config} ]]; then
ewarn "You are using a depreciated configuration syntax for ${iface}"
ewarn "You are advised to read /etc/conf.d/net.example and upgrade it accordingly"
fi
fi
# Handle "noop" correctly
if [[ ${config[0]} == "noop" ]]; then
if interface_is_up "${iface}" true ; then
einfo "Keeping current configuration for ${iface}"
eend 0
return 0
fi
# Remove noop from the config var
config=( "${config[@]:1}" )
fi
# Provide a default of DHCP if no configuration is set and we're auto
# Otherwise a default of NULL
if [[ -z ${config} ]]; then
# if [[ ${RC_AUTO_INTERFACE} == "yes" ]]; then
if [[ $( type -t "dhcp_start" ) == "function" ]]; then
config=( "dhcp" )
ewarn "Configuration not set for ${iface} - assuming dhcp"
else
eerror "Cannot default to dhcp as there is no dhcp module loaded"
eerror "No configuration for ${iface}"
return 1
fi
# else
# config=( "null" )
# ewarn "Configuration not set for ${iface} - assuming null"
# fi
fi
einfo "Bringing up ${iface}"
eindent
for (( config_counter=0; config_counter<${#config[@]}; config_counter++ )); do
# Handle null and noop correctly
if [[ ${config[config_counter]} == "null" \
|| ${config[config_counter]} == "noop" ]]; then
eend 0
config_worked=true
continue
fi
# We convert it to an array - this has the added
# bonus of trimming spaces!
conf=( ${config[config_counter]} )
einfo "${conf[0]}"
# Do we have a function for our config?
if [[ $( type -t "${conf[0]}_start" ) == "function" ]]; then
eindent
${conf[0]}_start "${iface}" ; x=$?
eoutdent
[[ ${x} == 0 ]] && config_worked=true && continue
# We need to test to see if it's an IP address or a function
# We do this by testing if the 1st character is a digit
elif [[ ${conf[0]:0:1} == [[:digit:]] || ${conf[0]} == *:* ]]; then
x="0"
if [[ ${RC_AUTO_INTERFACE} == "yes" \
&& $(type -t address_exists ) == "function" ]]; then
if address_exists "${iface}" "${conf[0]}" ; then
eerror "${conf[0]%%/*} already taken on ${iface}"
x="1"
fi
fi
[[ ${x} == "0" ]] && interface_add_address "${iface}" ${conf[@]}; x="$?"
eend "${x}" && config_worked=true && continue
else
eerror "No loaded modules provide \"${conf[0]}\" (${conf[0]}_start)"
fi
if [[ -n ${fallback[config_counter]} ]]; then
einfo "Trying fallback configuration"
config[config_counter]="${fallback[config_counter]}"
fallback[config_counter]=""
# Do we have a fallback route?
if [[ -n ${fallback_route[config_counter]} ]]; then
eval "routes_${ifvar}=( "\"\$\{fallback_route\[${config_counter}\]\[@\]\}\"" )"
fallback_route[config_counter]=""
fi
(( config_counter-- )) # since the loop will increment it
continue
fi
done
eoutdent
# We return failure if no configuration parameters worked
${config_worked} || return 1
# Start any modules with _post_start
for mod in ${MODULES[@]}; do
if [[ $( type -t "${mod}_post_start" ) == "function" ]]; then
${mod}_post_start "${iface}" || return 1
fi
done
return 0
}
# bool iface_stop(char *interface)
#
# iface_stop: bring down an interface. Don't trust information in
# /etc/conf.d/net since the configuration might have changed since
# iface_start ran. Instead query for current configuration and bring
# down the interface.
iface_stop() {
local iface="$1" i aliases need_begin=false mod
local RC_INDENTATION="${RC_INDENTATION}"
# pre Stop any modules
for mod in ${MODULES[@]}; do
[[ $( type -t "${mod}_pre_stop" ) == "function" ]] \
&& ${mod}_pre_stop "${iface}"
done
einfo "Bringing down ${iface}"
eindent
# Collect list of aliases for this interface.
# List will be in reverse order.
aliases=$( interface_get_aliases_rev "${iface}" )
# Stop aliases before primary interface.
# Note this must be done in reverse order, since ifconfig eth0:1
# will remove eth0:2, etc. It might be sufficient to simply remove
# the base interface but we're being safe here.
for i in ${aliases} ${iface}; do
# Stop all our modules
for mod in ${MODULES[@]}; do
[[ $( type -t "${mod}_stop" ) == "function" ]] && ${mod}_stop "${i}"
done
# A module may have removed the interface
if ! interface_exists "${iface}" ; then
eend 0
continue
fi
# Delete all the addresses for this alias
interface_del_addresses "${i}"
# Do final shut down of this alias
if ! ${IN_BACKGROUND}; then
ebegin "Shutting down ${i}"
interface_iface_stop "${i}"
eend "$?"
fi
done
# post Stop any modules
for mod in ${MODULES[@]}; do
# We have already taken down the interface, so no need to error
[[ $( type -t "${mod}_post_stop" ) == "function" ]] \
&& ${mod}_post_stop "${iface}"
done
return 0
}
# bool run_start(char *iface)
#
# Brings up ${IFACE}. Calls preup, iface_start, then postup.
# Returns 0 (success) unless preup or iface_start returns 1 (failure).
# Ignores the return value from postup.
# We cannot check that the device exists ourselves as modules like
# tuntap make create it.
run_start() {
local iface="$1" IFVAR=$( bash_variable "$1" )
# We do this so users can specify additional addresses for lo if they
# need too - additional routes too
# However, no extra modules are loaded as they are just not needed
if [[ ${iface} == "lo" ]]; then
metric_lo="0"
config_lo=( "127.0.0.1/8 brd 127.255.255.255" "${config_lo[@]}" )
routes_lo=( "127.0.0.0/8" "${routes_lo[@]}" )
fi
# We may not have a loaded module for ${iface}
# Some users may have "alias natsemi eth0" in /etc/modules.d/foo
# so we can work with this
# However, if they do the same with eth1 and try to start it
# but eth0 has not been loaded then the module gets loaded as
# eth0.
# Not much we can do about this :(
# Also, we cannot error here as some modules - such as bridge
# create interfaces
if ! interface_exists "${iface}" ; then
/sbin/modprobe "${iface}" &>/dev/null
fi
# Call user-defined preup function if it exists
if [[ $( type -t preup ) == "function" ]]; then
einfo "Running preup function"
eindent
( preup "${iface}" )
eend "$?" "preup ${iface} failed" || return 1
eoutdent
fi
# If config is set to noop and the interface is up with an address
# then we don't start it
local config
eval config=( \"\$\{config_${IFVAR}\[@\]\}\" )
if [[ ${config[0]} == "noop" ]] && interface_is_up "${iface}" true ; then
einfo "Keeping current configuration for ${iface}"
eend 0
else
# Remove noop from the config var
[[ ${config[0]} == "noop" ]] \
&& eval "config_${IFVAR}=( "\"\$\{config\[@\]:1\}\"" )"
# There may be existing ip address info - so we strip it
interface_del_addresses "${iface}"
# Start the interface
if ! iface_start "${iface}" ; then
interface_exists "${iface}" && interface_down "${iface}"
eend 1
return 1
fi
fi
# Call user-defined postup function if it exists
if [[ $( type -t postup ) == "function" ]]; then
einfo "Running postup function"
eindent
( postup "${iface}" )
eoutdent
fi
return 0
}
# bool run_stop(char *iface) {
#
# Brings down ${iface}. If predown call returns non-zero, then
# stop returns non-zero to indicate failure bringing down device.
# In all other cases stop returns 0 to indicate success.
run_stop() {
local iface="$1" IFVAR=$( bash_variable "$1" ) x
# Load our ESSID variable so users can use it in predown() instead
# of having to write code.
local ESSID=$( get_options "ESSID" ) ESSIDVAR
[[ -n ${ESSID} ]] && ESSIDVAR=$( bash_variable "${ESSID}" )
# Call user-defined predown function if it exists
if [[ $( type -t predown ) == "function" ]]; then
einfo "Running predown function"
eindent
( predown "${iface}" )
eend $? "predown ${iface} failed" || return 1
eoutdent
elif is_net_fs /; then
eerror "root filesystem is network mounted -- can't stop ${iface}"
return 1
fi
iface_stop "${iface}" || return 1 # always succeeds, btw
# Call user-defined postdown function if it exists
if [[ $( type -t postdown ) == "function" ]]; then
einfo "Running postdown function"
eindent
( postdown "${iface}" )
eoutdent
fi
return 0
}
# bool run(char *iface, char *cmd)
#
# Main start/stop entry point
# We load modules here and remove any functions that they
# added as we may be called inside the same shell scope for another interface
run() {
local iface="$1" cmd="$2" r=1 RC_INDENTATION="${RC_INDENTATION}"
local starting=true
local -a MODULES mods
local IN_BACKGROUND="${IN_BACKGROUND}"
# No point in backgrounding if we're already there ...
# This is also required so we can select the "best" interface
if [[ ${IN_BACKGROUND} == "true" || ${IN_BACKGROUND} == "1" ]]; then
IN_BACKGROUND=true
background=false
else
IN_BACKGROUND=false
fi
# We need to override the exit function as runscript.sh now checks
# for it. We need it so we can mark the service as inactive ourselves.
unset -f exit
eindent
[[ ${cmd} == "stop" ]] && starting=false
# We force lo to only use these modules for a major speed boost
[[ ${iface} == "lo" ]] && modules_force=( "iproute2" "ifconfig" "system" )
if modules_load "${iface}" "${starting}" ; then
if [[ ${cmd} == "stop" ]]; then
# Reverse the module list for stopping
mods=( "${MODULES[@]}" )
for ((i = 0; i < ${#mods[@]}; i++)); do
MODULES[i]=${mods[((${#mods[@]} - i - 1))]}
done
run_stop "${iface}" && r=0
remove_state "${iface}"
else
run_start "${iface}" && r=0
fi
fi
# Only apply best state if we're on auto
if [[ ${r} == "0" ]]; then
local siface=""
if [[ ${RC_AUTO_INTERFACE} == "yes" ]]; then
siface=$( select_best_interface )
if [[ -n ${siface} ]]; then
einfo "Selecting best interface: ${siface}"
fi
elif [[ ${cmd} == "start" ]]; then
siface="${iface}"
fi
[[ -n ${siface} ]] && apply_state "${siface}"
else
if [[ ${cmd} == "start" ]]; then
# Call user-defined failup if it exists
if [[ $( type -t failup ) == "function" ]]; then
einfo "Running failup function"
eindent
( failup "${iface}" )
eoutdent
fi
else
# Call user-defined faildown if it exists
if [[ $( type -t faildown ) == "function" ]]; then
einfo "Running faildown function"
eindent
( faildown "${iface}" )
eoutdent
fi
fi
fi
return "${r}"
}
# void link_file(char *file)
#
# Move a config file from /etc to ${netdir} and creates a link if needed.
# This enables net-scripts to control the config file for interface management
# and allow /etc to become read only.
link_file() {
local file="$1"
local link=$( readlink "/etc/${file}" 2>/dev/null )
if [[ ${link} != "${netdir}/${file}" ]]; then
if [[ -f "/etc/${file}" ]]; then
vewarn "Moving /etc/${file} to ${netdir}/${file} and creating link"
mv "/etc/${file}" "${netdir}"
ln -snf "${netdir}/${file}" "/etc/${file}"
fi
fi
}
# bool start(void)
#
# Start entry point so that we only have one function
# which localises variables and unsets functions
start() {
if [[ ${IN_HOTPLUG} == "1" ]]; then
# If we've been called by hotplug, check if we have
# a policy for the interface for not starting
local x ifvar=$( bash_variable "${IFACE}" )
eval x=\"\$\{hotplug_${ifvar}\}\"
if [[ ${x} == "no" || ${x} == "false" ]]; then
eerror "Not starting interface ${IFACE} due to hotplug policy"
unset -f exit
mark_service_stopped "net.${IFACE}"
exit 1
fi
fi
if [[ ! -d "${statedir}/${IFACE}" ]]; then
if ! mkdir -m 0755 -p "${statedir}/${IFACE}" ; then
eerror "Unable to create state directory!"
return 1
fi
fi
if [[ ${RC_AUTO_INTERFACE} == "yes" ]]; then
link_file "resolv.conf"
link_file "ntp.conf"
link_file "yp.conf"
fi
einfo "Starting ${IFACE}"
run "${IFACE}" start
}
# bool stop(void)
#
# Stop entry point so that we only have one function
# which localises variables and unsets functions
stop() {
einfo "Stopping ${IFACE}"
run "${IFACE}" stop
}
# vim:ts=4
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