Redirect signals to a child process #915
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Hi!
Currently, SOPS doesn't redirect any signals to the child process when running in
exec-fileorexec-envmodes so the child process can't react to a signal (e.g.SIGHUPfor reloading orSIGTERM/SIGINTto shutdown graceful). Instead, SOPS shuts down without giving any chance to the child process.This PR causes SOPS to wait for the child process to finish first and redirect all the signals it receives to the child process. Also, child processes are created with different process group ID which means that only SOPS receives signals, and not both.
Fixes #840
Related #880