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|
#!/bin/sh
# $FreeBSD$
#
# PROVIDE: netwait
# REQUIRE: devd routing
# KEYWORD: nojail
#
# The netwait script helps handle two situations:
# - Systems with USB or other late-attaching network hardware which
# is initialized by devd events. The script waits for all the
# interfaces named in the netwait_if list to appear.
# - Systems with statically-configured IP addresses in rc.conf(5).
# The IP addresses in the netwait_ip list are pinged. The script
# waits for any single IP in the list to respond to the ping. If your
# system uses DHCP, you should probably use synchronous_dhclient="YES"
# in your /etc/rc.conf instead of netwait_ip.
# Either or both of the wait lists can be used (at least one must be
# non-empty if netwait is enabled).
. /etc/rc.subr
name="netwait"
rcvar="netwait_enable"
start_cmd="${name}_start"
stop_cmd=":"
netwait_start()
{
local ip rc count output link wait_if got_if any_error
if [ -z "${netwait_if}" ] && [ -z "${netwait_ip}" ]; then
err 1 "No interface or IP addresses listed, nothing to wait for"
fi
if [ ${netwait_timeout} -lt 1 ]; then
err 1 "netwait_timeout must be >= 1"
fi
if [ -n "${netwait_if}" ]; then
any_error=0
for wait_if in ${netwait_if}; do
echo -n "Waiting for ${wait_if}"
link=""
got_if=0
count=1
# Handle SIGINT (Ctrl-C); force abort of while() loop
trap break SIGINT
while [ ${count} -le ${netwait_if_timeout} ]; do
if output=`/sbin/ifconfig ${wait_if} 2>/dev/null`; then
if [ ${got_if} -eq 0 ]; then
echo -n ", interface present"
got_if=1
fi
link=`expr "${output}" : '.*[[:blank:]]status: \(no carrier\)'`
if [ -z "${link}" ]; then
echo ', got link.'
break
fi
fi
sleep 1
count=$((count+1))
done
# Restore default SIGINT handler
trap - SIGINT
if [ ${got_if} -eq 0 ]; then
echo ", wait failed: interface never appeared."
any_error=1
elif [ -n "${link}" ]; then
echo ", wait failed: interface still has no link."
any_error=1
fi
done
if [ ${any_error} -eq 1 ]; then
warn "Continuing with startup, but be aware you may not have "
warn "a fully functional networking layer at this point."
fi
fi
if [ -n "${netwait_ip}" ]; then
# Handle SIGINT (Ctrl-C); force abort of for() loop
trap break SIGINT
for ip in ${netwait_ip}; do
echo -n "Waiting for ${ip} to respond to ICMP ping"
count=1
while [ ${count} -le ${netwait_timeout} ]; do
/sbin/ping -t 1 -c 1 -o ${ip} >/dev/null 2>&1
rc=$?
if [ $rc -eq 0 ]; then
# Restore default SIGINT handler
trap - SIGINT
echo ', got response.'
return
fi
count=$((count+1))
done
echo ', failed: No response from host.'
done
# Restore default SIGINT handler
trap - SIGINT
warn "Exhausted IP list. Continuing with startup, but be aware you may"
warn "not have a fully functional networking layer at this point."
fi
}
load_rc_config $name
run_rc_command "$1"
|
