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When running the run-execscript bash ptest as a user rather than root, a warning: bash: cannot set terminal process group (16036): Inappropriate ioctl for device bash: no job control in this shell contaminates the bash log files causing the test to fail. This happens only when run under ptest-runner and not when interactively testing! The changes made to fix this include: 1. Get the process group id (pgid) before forking, 2. Set the pgid in both the parent and child to avoid a race, 3. Find, open and set permission on the child tty, and 4. Allow the child to attach to controlling tty. (From OE-Core rev: 83795a83505a311058130c662ff3342b0e39e67f) Signed-off-by: Randy MacLeod <Randy.MacLeod@windriver.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>