diff options
Diffstat (limited to 'system')
| -rwxr-xr-x | system/skeleton/etc/network/if-pre-up.d/wait_iface | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/system/skeleton/etc/network/if-pre-up.d/wait_iface b/system/skeleton/etc/network/if-pre-up.d/wait_iface new file mode 100755 index 000000000..ebccff2aa --- /dev/null +++ b/system/skeleton/etc/network/if-pre-up.d/wait_iface @@ -0,0 +1,21 @@ +#!/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 + |