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add a backup for the environment variables named TIMEOUT, QUIT, `… #8

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add a backup for the environment variables named TIMEOUT, QUIT, `… #8

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10 changes: 7 additions & 3 deletions wait-for
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Original file line number Diff line number Diff line change
@@ -1,5 +1,10 @@
#!/bin/sh

OLD_TIMEOUT=$TIMEOUT
OLD_QUIET=$QUIET
OLD_PORT=$PORT
OLD_HOST=$HOST

TIMEOUT=15
QUIET=0

Expand All @@ -20,14 +25,13 @@ USAGE
}

wait_for() {
command="$*"
for i in `seq $TIMEOUT` ; do
nc -z "$HOST" "$PORT" > /dev/null 2>&1

result=$?
if [ $result -eq 0 ] ; then
if [ -n "$command" ] ; then
exec $command
if [ $# -gt 0 ] ; then
TIMEOUT=$OLD_TIMEOUT QUIET=$OLD_QUIET PORT=$OLD_PORT HOST=$OLD_HOST exec "$@"
fi
exit 0
fi
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