| #!/bin/sh |
| |
| # This allows NFS booting to work while also being able to configure |
| # the network interface via DHCP when not NFS booting. Otherwise, a |
| # NFS booted system will likely hang during DHCP configuration. |
| |
| # Attempting to configure the network interface used for NFS will |
| # initially bring that network down. Since the root filesystem is |
| # accessed over this network, the system hangs. |
| |
| # This script is run by ifup and will attempt to detect if a NFS root |
| # mount uses the interface to be configured (IFACE), and if so does |
| # not configure it. This should allow the same build to be disk/flash |
| # booted or NFS booted. |
| |
| nfsip=`sed -n '/^[^ ]*:.* \/ nfs.*[ ,]addr=\([0-9.]\+\).*/s//\1/p' /proc/mounts` |
| if [ -n "$nfsip" ] && ip route get to "$nfsip" | grep -q "dev $IFACE"; then |
| echo Skipping $IFACE, used for NFS from $nfsip |
| exit 1 |
| fi |
