Is there a linux command to lock until a process exits?

Question

This is exactly what the question asks. In addition, all I have is a PID, and the shell in which I run the command is not necessarily the shell that originally called this process. Any ideas?

Answer 1

while ps -p $PID >/dev/null 2>&1; do sleep 1; done

or

while ps -p $PID >/dev/null 2>&1; do :; done

Answer 2

This is not a very neat way to do this, but you can constantly call system calls kill(2)to the specified pid, setting zero as a signal. The first time you killfail, setting errnoto ESRCH, you can conclude that the process has completed.

Answer 3

, dir/proc/PID. , .