dumb-init/tests/test-help-message

#!/bin/sh -u
# dumb-init should say something useful when called with no arguments, and exit
# nonzero.

dumb_init="$1"

status=$($dumb_init > /dev/null 2>&1; echo $?)

if [ "$status" -ne 0 ]; then
    msg=$($dumb_init 2>&1 || true)
    msg_len=${#msg}

    if [ "$msg_len" -le 50 ]; then
        echo "Error: Expected dumb-init with no arguments to print a useful message, but it was only ${msg_len} chars long."
        exit 1
    fi
else
    echo "Error: Expected dumb-init with no arguments to return nonzero, but it returned ${status}."
    exit 1
fi