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image_to_live.sh: fix ip address detection

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Change-Id: I6d05da5d1deaf45c42a3285c105fd310a588ef4e

BUG=5246
TEST=update an image, live

Review URL: http://codereview.chromium.org/6531005
This commit is contained in:
Zdenek Behan 2011-02-18 00:51:21 +01:00
parent 49523439a1
commit 9a776566e9
1 changed files with 14 additions and 4 deletions
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18
image_to_live.sh
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@ -101,10 +101,20 @@ function remote_reboot_sh {
# to us.
function get_hostname {
local hostname
# Try to parse ifconfig for ip address
hostname=$(ifconfig eth0 \
| grep 'inet addr' \
| sed 's/.\+inet addr:\(\S\+\).\+/\1/') || hostname=${HOSTNAME}
# Try to parse ifconfig for ip address. Use sudo, because not all distros
# allow a common user to call ifconfig.
# TODO(zbehan): What if target is not connected via eth0? Update over wifi?
# Dedicated usb NIC? Perhaps this detection should be done in the target,
# which will get the return address in one way or another. Or maybe we should
# just open a ssh tunnel and use localhost.
hostname=$(sudo ifconfig eth0 |
grep 'inet addr' |
cut -f2 -d':' |
cut -f1 -d' ')
# Fallback to $HOSTNAME if that failed
[ -z "${hostname}" ] && hostname=${HOSTNAME}
echo ${hostname}
}