On 02/09/2015 23:14, Buck Evan wrote:
Given a daemon that doesn't have a readyfile feature, I'd like to write a
`check` script and hook it up to s6's readiness notification
<http://skarnet.org/software/s6/notifywhenup.html>.
echo 3 > notification-fd
mv run run.real
cat > run <<EOF
#!/command/execlineb -P
background -d
{
fdmove 1 3
forx -x 0 dummy { 1 2 3 4 5 6 7 }
ifelse { ./check } { echo }
foreground { sleep 1 }
exit 1
}
fdclose 3
./run.real
EOF
chmod 755 run
Untested, but that should report readiness if ./check succeeds
within 7 attempts at running it, with 1 second between attempts.
How it works is left as an exercise to the reader. %-P
--
Laurent
