deadlock.test.sh

#!/bin/bash
# Cygwin spawn wait deadlock test.
# (C) John Peterson. License GNU GPL 3.
function logb() { printf "\033[1;30m$1%s\033[0m"; }
function logc() { printf "\033[0;36m$1%s\033[0m"; }
function iscygwin() {
    if [ -n "`objdump -p ./readm.exe|grep cygwin1.dll`" ]; then echo true; else echo false; fi
}
if $(iscygwin); then printf "readm must be non-cygwin process. please build with mingw.) \n"; exit 0; fi
function time_s() {
    echo -n `date +%s`
}
logb "Running pgrep repeatedly. If the counter stops it\'s deadlocked. (Terminate pgrep with \'taskkill /f /im pgrep.exe\' to end the loop.)\n"
{ n=0; t=$(time_s); while :; do
    logc "`printf "\r\033[Kpgrep bash %d" $i`"
    pgrep bash>/dev/null
    if [ $(($(time_s)-2)) -gt $t ]; then logb "`printf "\nexit from deadlock\n"`"; break; fi
    t=$(time_s)
    ((i++))
done; }|./readm