| #!/bin/bash |
| |
| # |
| # Container entrypoint that waits for all spawned processes. |
| # |
| |
| set -e -u |
| |
| # Create a FIFO and start reading from its read end. |
| tempdir=$(mktemp -d "/tmp/done.XXXXXXXXXX") |
| trap 'rm -r "$tempdir"' EXIT |
| done="$tempdir/pipe" |
| mkfifo "$done" |
| cat "$done" & waiter=$! |
| |
| # Start the workload. Its descendants will inherit the FIFO's write end. |
| status=0 |
| if [ "$#" -eq 0 ]; then |
| bash 9>"$done" || status=$? |
| else |
| "$@" 9>"$done" || status=$? |
| fi |
| |
| # When the workload and all of its descendants exit, the FIFO's write end will |
| # be closed and `cat "$done"` will exit. Wait until it happens. This is needed |
| # in order to handle SelfUpdater, which the workload may start in background |
| # before exiting. |
| wait "$waiter" |
| |
| exit "$status" |
