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@unakatsuo
Created June 15, 2011 09:05
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bash retry function
# Run 10 times at most.
# % retry 10 echo "xxx"
#
# Run multiple lines of command in here document.
# % retry 10 <<'_END_'
# echo 1
# echo 2
# _END_
function retry {
typeset retry_max=$1
shift
typeset cmdlst="" i
if [[ -t 0 ]]; then
cmdlst="$*"
else
read -u 0 -d '' i
cmdlst="$i"
fi
typeset count=$retry_max
while [[ "$count" -gt 0 ]]; do
eval "$cmdlst" && break
count=$(($count - 1))
sleep 1
done
[[ "$count" -eq 0 ]] && {
echo "Retry failed [$retry_max]: ${cmdlst}" >&2
return 1;
}
return 0
}
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