Bash -e是否存在检查阻止文件删除？

Question

I have a process that creates a lockfile ~/process.lock

I wanted to execute a command as soon that process ended, so i wrote

while [ -e ~/process.lock ]
do
:
done
#do stuff after process has ended

Apparently this prevented process.lock being deleted by the parent process. Did this happen? If yes, why? and what is the correct way to do this.

Answer 1

Indeed, the problem is probably not the -e test, but the tight loop, delaying anything else from happening, especially on a system with only a single (logical) core. Adding sleep will undoubtedly help, and you may find that the sleep command accepts arguments less than 1, so you can notice the file disappear fairly quickly.