Comparing PIDs in a Shell...

Shell Programming and Scripting
1

Hi,

There is a file having a list of running PIDs (pid_process) and another file having a list of registered PIDs (pid_regieter).

I want to check if:-

a) there is at least one running PID that does not correspond to a
registered PID (listing the PID not registered in the file)

b) there is at least one registered PID that doesn't correspond to a running
PID (listing the PID missing).

Any inputs please.

Thanks a lot in advance.

2

Are those PID's sorted ? If then

comm -3 pid_process pid_regieter

See man comm for more details.