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# Uses wpa_supplicant to check for association to a network
# wpa_check interface [timeout]
wpa_check()
{
local timeout=0 INTERFACE="$1" TIMEOUT="${2:-15}"
while [[ $timeout -lt "$TIMEOUT" ]]; do
( # Sometimes wpa_supplicant isn't ready so silence errors for 2s only to avoid hiding real errors
if [[ $timeout -lt 2 ]]; then
eval $(wpa_cli -i "$INTERFACE" status 2> /dev/null | fgrep "wpa_state=")
else
eval $(wpa_cli -i "$INTERFACE" status | fgrep "wpa_state=")
fi
[[ "$wpa_state" = "COMPLETED" ]]
) && return 0
sleep 1
let timeout++
done
echo "$wpa_state"
# wpa_cli -i "$INTERFACE" terminate >/dev/null 2>&1 # callers sometimes called stop_wpa, which does more but seems redundant
# termination should either be handled properly here, or by callers
stop_wpa "$INTERFACE"
return 1
}
start_wpa()
{
local INTERFACE="$1" WPA_CONF="$2"
shift 2
local WPA_OPTS="$*"
wpa_supplicant -B -P "/var/run/wpa_supplicant_${INTERFACE}.pid" -i "$INTERFACE" -c "$WPA_CONF" $WPA_OPTS
sleep 1
if [[ ! -f "/var/run/wpa_supplicant_${INTERFACE}.pid" ]]; then
return 1
fi
}
stop_wpa()
{
wpa_cli -i "$1" terminate &> /dev/null
sleep 1 # JP: need this else the file tends to disappear after [[ -f ... ]] but before cat...
# see <http://bbs.archlinux.org/viewtopic.php?pid=515667#p515667>
if [[ -f "/var/run/wpa_supplicant_$1.pid" ]]; then
kill "$(cat "/var/run/wpa_supplicant_$1.pid")" &>/dev/null &
fi
}
# vim: ft=sh ts=4 et sw=4:
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