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openwrt-xburst/package/ppp/files/ppp.sh
nbd 0d67238dc6 use lock to remove race conditions in bringing up ppp and dhcp that would lead to multiple active processes
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@5298 3c298f89-4303-0410-b956-a3cf2f4a3e73
2006-10-26 01:33:36 +00:00

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scan_ppp() {
config_get ifname "$1" ifname
pppdev="${pppdev:-0}"
config_set "$1" ifname "ppp$pppdev"
config_set "$1" unit "$pppdev"
}
start_pppd() {
local cfg="$1"; shift
# make sure only one pppd process is started
lock "/var/lock/ppp-${cfg}"
local pid="$(cat /var/run/ppp-${cfg}.pid 2>/dev/null)"
[ -d "/proc/$pid" ] && grep pppd "/proc/$pid/cmdline" 2>/dev/null >/dev/null && {
lock -u "/var/lock/ppp-${cfg}"
return 0
}
config_get device "$cfg" device
config_get unit "$cfg" unit
config_get username "$cfg" username
config_get password "$cfg" password
config_get keepalive "$cfg" keepalive
interval="${keepalive%%*[, ]}"
[ "$interval" != "$keepalive" ] || interval=5
config_get demand "$cfg" demand
[ -n "$demand" ] && echo "nameserver 1.1.1.1" > /tmp/resolv.conf
/usr/sbin/pppd "$@" \
${keepalive:+lcp-echo-interval $interval lcp-echo-failure ${keepalive##[, ]*}} \
${demand:+precompiled-active-filter /etc/ppp/filter demand idle }${demand:-persist} \
usepeerdns \
defaultroute \
replacedefaultroute \
${username:+user "$username" password "$password"} \
linkname "$cfg" \
ipparam "$cfg"
lock -u "/var/lock/ppp-${cfg}"
}