Given a process ID, how can I tell if that process is currently blocked in a polling state? i.e. it has called poll() with a negative timeout, and is waiting for input to become ready.
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Given a process ID, how can I tell if that process is currently blocked in a polling state? i.e. it has called poll() with a negative timeout, and is waiting for input to become ready.
On UNIX-like systems the command line utility ‘ps’ provides this information. There are many flavors of ps depending on the OS, so read the man page.
On a BSD-like system (mac):
where STAT is the process state. S means interruptible sleep. s (lower case) means session leader. ‘+’ means it’s in the foreground process group. R means running, or runnable (on run queue). There are many more possible states.