process id of some other unrelated process to be used in C

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is there a function or system call in C which I can use to find Process ID of some other process?

Say, in process A I want to find the process ID of process B? Is there some function for this similar to getpid()?

Posted 4-Sep-12 22:11pm

mimi from Unknown

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Jochen Arndt · Answer 1 · 2012-09-04T22:40:00

I don't know such function. But you may write your own by listing and parsing the information from the /proc/[pid] entries in the proc file system (see man 5 proc[^]).

Another solution would be execution of the ps command with the popen() function and parsing the output for the name of the other process.