1#!/bin/sh 2# 3# PROVIDE: netwait 4# REQUIRE: devd ipfw pf routing 5# KEYWORD: nojail 6# 7# The netwait script helps handle two situations: 8# - Systems with USB or other late-attaching network hardware which 9# is initialized by devd events. The script waits for all the 10# interfaces named in the netwait_if list to appear. 11# - Systems with statically-configured IP addresses in rc.conf(5). 12# The IP addresses in the netwait_ip list are pinged. The script 13# waits for any single IP in the list to respond to the ping. If your 14# system uses DHCP, you should probably use synchronous_dhclient="YES" 15# in your /etc/rc.conf instead of netwait_ip. 16# Either or both of the wait lists can be used (at least one must be 17# non-empty if netwait is enabled). 18 19. /etc/rc.subr 20 21name="netwait" 22desc="Wait for network devices or the network being up" 23rcvar="netwait_enable" 24 25start_cmd="${name}_start" 26stop_cmd=":" 27 28netwait_start() 29{ 30 local ip rc count output link wait_if got_if any_error 31 32 if [ -z "${netwait_if}" ] && [ -z "${netwait_ip}" ]; then 33 err 1 "No interface or IP addresses listed, nothing to wait for" 34 fi 35 36 if [ ${netwait_timeout} -lt 1 ]; then 37 err 1 "netwait_timeout must be >= 1" 38 fi 39 40 if [ -n "${netwait_if}" ]; then 41 any_error=0 42 for wait_if in ${netwait_if}; do 43 echo -n "Waiting for ${wait_if}" 44 link="" 45 got_if=0 46 count=1 47 # Handle SIGINT (Ctrl-C); force abort of while() loop 48 trap break SIGINT 49 while [ ${count} -le ${netwait_if_timeout} ]; do 50 if output=`/sbin/ifconfig ${wait_if} 2>/dev/null`; then 51 if [ ${got_if} -eq 0 ]; then 52 echo -n ", interface present" 53 got_if=1 54 fi 55 link=`expr "${output}" : '.*[[:blank:]]status: \(no carrier\)'` 56 if [ -z "${link}" ]; then 57 echo ', got link.' 58 break 59 fi 60 fi 61 sleep 1 62 count=$((count+1)) 63 done 64 # Restore default SIGINT handler 65 trap - SIGINT 66 if [ ${got_if} -eq 0 ]; then 67 echo ", wait failed: interface never appeared." 68 any_error=1 69 elif [ -n "${link}" ]; then 70 echo ", wait failed: interface still has no link." 71 any_error=1 72 fi 73 done 74 if [ ${any_error} -eq 1 ]; then 75 warn "Continuing with startup, but be aware you may not have " 76 warn "a fully functional networking layer at this point." 77 fi 78 fi 79 80 if [ -n "${netwait_ip}" ]; then 81 # Handle SIGINT (Ctrl-C); force abort of for() loop 82 trap break SIGINT 83 84 for ip in ${netwait_ip}; do 85 echo -n "Waiting for ${ip} to respond to ICMP ping" 86 87 count=1 88 while [ ${count} -le ${netwait_timeout} ]; do 89 /sbin/ping -t 1 -c 1 -o ${ip} >/dev/null 2>&1 90 rc=$? 91 92 if [ $rc -eq 0 ]; then 93 # Restore default SIGINT handler 94 trap - SIGINT 95 96 echo ', got response.' 97 return 98 fi 99 count=$((count+1)) 100 done 101 echo ', failed: No response from host.' 102 done 103 104 # Restore default SIGINT handler 105 trap - SIGINT 106 107 warn "Exhausted IP list. Continuing with startup, but be aware you may" 108 warn "not have a fully functional networking layer at this point." 109 fi 110 111} 112 113load_rc_config $name 114run_rc_command "$1" 115