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07-07-2008
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How to find if a process a daemon ?
I have a scenario where I need to find if a process is a daemon process or not. This check needs to be done from within the process. I know there are no direct API's to do so. I have explored these options.
1. ctermid() - this can be unsuccessful as per the man pages 2. int devtty; if ((devtty = open ("/dev/tty", O_RDWR)) < 0) then it is a daemon. Are there any other cases, where this may not be true ? 3. Since setsid() is used to detach from a terminal, perhaps getsid() can be used to check for process group leader and session leader. 4. Look if parent pid is 1 or not. Can a daemon process have a ppid other than 1 ? Are there more options ? I dont know if there is a best way to do this, but what would be the most appropriate way ? |
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