If a process starts up and does a setuid, should it be writing the PID file before or after the setuid?
Two methods exists AFAIK:
1 - write your PID immediately, and the file is chown root:wheel 2 - write your PID to /var/run/myapp/myapp.pid where /var/run/myapp/ is chown myapp:myapp
Of the two, I think #1 is cleaner as it does not require another directory with special permissions.
You may have problems removing the file on exit, though.
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