RFC: Use pipe2 and O_CLOEXEC to check if exec succeeds after fork#8126

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smvv wants to merge 1 commit intorust-lang:masterfrom

smvv:issue_6914_fork_exec_failure

Commits on Jul 30, 2013

Use pipe2 and O_CLOEXEC to check in parent process if exec succeeds after fork
smvv
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