test of running [ba]sh command with a timeout

timeoutrun.sh

#!/bin/bash

#set -x

evcount=0
function eventually() {
    if [ $evcount -gt 5 ] ; then
        return 0
    fi
    evcount=$(($evcount + 1))
    return 1
}

# run a command until it returns success or we timeout
function timeout_run() {
    timeout=$1
    shift
    pause=$1
    shift
    elapsed=0

    while : ; do
        echo "XXX running command time=$timeout pause=$pause elapsed=$elapsed cmd: $@"
        if $@ ; then
            return
        fi

        if [ $elapsed -ge $timeout ] ; then
            break
        fi

        sleep $pause
        elapsed=$(($elapsed + $pause))
    done
    echo "XXX giving up..."
    exit 1
}


evcount=0
function eventually() {
    if [ $evcount -gt 5 ] ; then
        return 0
    fi
    evcount=$(($evcount + 1))
    return 1
}


# test/demo

# has to be robust to -e
set -e

# works
timeout_run 10 1 sleep 1

# works
timeout_run 10 1 true

# works
timeout_run 10 1 curl -v https://f00f.org > /dev/null

# works, eventually
timeout_run 20 2 eventually

# will fail
timeout_run 10 1 false