| #!/bin/sh | |
| # In case we have a slow-to-appear interface (e.g. eth-over-USB), | |
| # and we need to configure it, wait until it appears, but not too | |
| # long either. IF_WAIT_DELAY is in seconds. | |
| if [ "${IF_WAIT_DELAY}" -a ! -e "/sys/class/net/${IFACE}" ]; then | |
| printf "Waiting for interface %s to appear" "${IFACE}" | |
| while [ ${IF_WAIT_DELAY} -gt 0 ]; do | |
| if [ -e "/sys/class/net/${IFACE}" ]; then | |
| printf "\n" | |
| exit 0 | |
| fi | |
| sleep 1 | |
| printf "." | |
| : $((IF_WAIT_DELAY -= 1)) | |
| done | |
| printf " timeout!\n" | |
| exit 1 | |
| fi | |