Hey folks,
I'm relatively new to LFS but have had to rebuild it three times due to experimenting and fine-tuning. One of the first things I do after building the base is to get my wireless internet working. As neither LFS nor BLFS have a built-in bootscript for connecting my wlan0 interface with both 'dhcpcd' and 'wpa_supplicant', I thought I'd write my own. I've seen a couple other scripts posted on the BLFS wiki and in the hints, but they didn't seem simple enough. Anyways, this is my third time writing this script as I always forget to back it up prior to a reformat.
I am posting this to keep it off my computer so I can always get it again. If it helps anyone else out...all the better.
*** Ensure you have 'dhcpcd' and 'wpa_supplicant' installed and configured prior to continuing ***
First here is my 'ifconfig.wlan0' config file. I am using (at the time of writing) the development version SVN-20110918 so I have this file in the '/etc/sysconfig' directory. If you're running the stable version 6.8, place it in the '/etc/sysconfig/network-devices' directory instead:
Code:
# Begin /etc/sysconfig/ifconfig.wlan0
ONBOOT=yes
SERVICE=wpa-dhcpcd
IFACE=wlan0
DRIVER=wext
WPA_CONF="/etc/wpa_supplicant.conf"
DHCP_START=""
DHCP_STOP="-k"
# Set PRINTIP="yes" to have the script print
# the DHCP assigned IP address
PRINTIP="yes"
# Set PRINTALL="yes" to print the DHCP assigned values for
# IP, SM, DG, and 1st NS. This requires PRINTIP="yes".
PRINTALL="yes"
# End /etc/sysconfig/ifconfig.wlan0
And last, 'wpa-dhcpcd' goes in the '/lib/services' directory (if running on the development branch). If you're using 6.8, instead place this file in the '/etc/sysconfig/network-devices/services' directory:
Code:
#!/bin/sh
# Begin /lib/services/wpa-dhcpcd
# Based upon lfs-bootscripts-1.12 $network_devices/if{down,up}
# Rewritten by Nathan Coulson <nathan NOatSPAM linuxfromscratch NOdotSPAM org>
# Adapted for dhcpcd by DJ Lucas <dj NOatSPAM lucasit NOdotSPAM com>
# Adapted for wpa_supplicant by Brian Blumberg <blumbri NOatSPAM gmail NOdotSPAM com>
#$LastChangedBy: blumbri $
#$Date: 2011-09-18 11:16:21 +0000 (Sun, 18 Sep 2011) $
. /etc/sysconfig/rc
. $rc_functions
. $IFCONFIG
PIDFILE="/var/run/dhcpcd-$1.pid"
LEASEINFO="/var/lib/dhcpcd/dhcpcd-$1.info"
WPACTRL="/var/run/wpa_supplicant/$1"
case "$2" in
up)
boot_mesg -n "Starting wpa_supplicant on the $1 interface..."
if [ -r "$WPACTRL" ]
then
boot_mesg "wpa_supplicant already running!" ${WARNING}
echo_warning
exit 2
fi
/sbin/wpa_supplicant -i $IFACE -B -D $DRIVER -c "$WPA_CONF"
# Save the return value
RET="$?"
echo ""
$(exit "$RET")
evaluate_retval
boot_mesg -n "Starting dhcpcd on the $1 interface..."
# Test to see if there is a stale pid file
if [ -f "$PIDFILE" ]
then
ps `cat "$PIDFILE"` | grep dhcpcd > /dev/null
if [ $? != 0 ]
then
rm -f $PIDFILE > /dev/null
else
boot_mesg "dhcpcd already running!" ${WARNING}
echo_warning
exit 2
fi
fi
/sbin/dhcpcd $1 $DHCP_START
# Save the return value
RET="$?"
# Print the assigned settings if requested
if [ "$RET" = "0" -a "$PRINTIP" = "yes" ]; then
. $LEASEINFO
if [ "$PRINTALL" = "yes" ]; then
echo ""
echo_ok
boot_mesg " DHCP Assigned Settings for $1:"
boot_mesg_flush
boot_mesg " IP Address: $IPADDR"
boot_mesg_flush
boot_mesg " Subnet Mask: $NETMASK"
boot_mesg_flush
boot_mesg " Default Gateway: $GATEWAYS"
boot_mesg_flush
boot_mesg " DNS Server: $DNSSERVERS"
boot_mesg_flush
else
boot_mesg " IP Addresss: $IPADDR"
echo_ok
fi
else
echo ""
$(exit "$RET")
evaluate_retval
fi
;;
down)
boot_mesg -n "Stopping dhcpcd on the $1 interface..."
if [ -z "$DHCP_STOP" ]
then
echo ""
killproc -p "$PIDFILE" /sbin/dhcpcd
else
/sbin/dhcpcd $1 $DHCP_STOP &> /dev/null
RET="$?"
if [ "$RET" -eq 0 ]; then
echo ""
echo_ok
elif [ "$RET" -eq 1 ]; then
boot_mesg "dhcpcd not running!" ${WARNING}
echo_warning
else
echo ""
echo_failure
fi
fi
boot_mesg -n "Stopping wpa_supplicant on the $1 interface..."
WPAPID=$(echo $(ps x | grep /sbin/wpa_supplicant | grep $IFACE) | cut -d' ' -f1)
if [ "x$WPAPID" != "x" ]
then
kill $WPAPID &> /dev/null
RET="$?"
if [ "$RET" -eq 0 ]; then
echo ""
echo_ok
else
echo ""
echo_failure
fi
else
boot_mesg "wpa_supplicant not running!" ${WARNING}
echo_warning
fi
;;
*)
echo "Usage: $0 [interface] {up|down}"
exit 1
;;
esac
# End /lib/services/wpa-dhcpcd
After doing this, upon boot (or running '/etc/rc.d/init.d/network start') your interface should be brought up, wpa_supplicant started, and dhcpcd loaded. Hopefully this helps someone!
Please let me know if you have any questions/comments.
-- blumbri
