Thread: Detect Close of a background process

  1. #1
    Registered User
    Join Date
    Apr 2003

    Detect Close of a background process

    Right now I have a program that executes another program and lets it run in the background. I want to know when the background process quits. I also want to know which background process quits, I can have multiple background processes running at the same time. All my background processes are stored in an array.

    I am trying to use the SIGCHLD, but I can't find a way to see which process actually sent the signal. I just get a default signal for whatever process closes.

    Any ideas on how I can use SIGCHLD or anything else?

  2. #2
    and the hat of int overfl Salem's Avatar
    Join Date
    Aug 2001
    The edge of the known universe
    Consider wait4() with a pid of -1 and a WNOHANG option
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

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