Add a method to set the controlling tty of child processes (unix).#28982

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withoutboats wants to merge 2 commits intorust-lang:masterfrom

withoutboats:tty_command

Commits on Oct 11, 2015

Add a method to set the controlling tty of child processes to unix::CommandExt.
withoutboats
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Commits on Oct 12, 2015

Modify the API so that session_leader takes an optional file handle, which will be set to be the controlling terminal.
withoutboats
committed