ruby - How do I kill a process whose PID is in a PID file? -


i have variable pidfile, stores pid of process.

how can kill pid in pidfile programmatically using ruby, assuming know filename, , not actual pid in it.

process.kill(15, file.read('pidfile').to_i)

or even

process.kill 15, file.read('pidfile').to_i

now, like:

system "kill `cat pidfile`" # or `kill \`cat pidfile\``

however, approach has more overhead, vulnerable code injection exploits, less portable, , more of shell script wrapped in ruby opposed actual ruby code.


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