Safe Haskell | Safe |
---|---|
Language | Haskell2010 |
Documentation
:: FilePath | command to run |
-> [String] | command line arguments |
-> Maybe [(String, String)] | optional environment variable override, default is current env |
-> IO a |
Run the given command with specified arguments, with optional environment variable override (default is to use the current process's environment)..
This function will check if the current process has a process ID of 1. If it does, it will install signal handlers for SIGTERM and SIGINT, set up a loop to reap all orphans, spawn a child process, and when that child dies, kill all other processes (first with a SIGTERM and then a SIGKILL) and exit with the child's exit code.
If this process is not PID1, then it will simply exec
the given command.
This function will never exit: it will always terminate your process, unless some exception is thrown.
Since: 0.1.0.0