From 130958cc24ad306684d92a8d965f3772f30e196a Mon Sep 17 00:00:00 2001 From: Richard Purdie Date: Mon, 8 Dec 2014 21:31:56 +0000 Subject: bitbake: bitbake-worker: Use setsid() rather than setpgid() The bug has a long discussion of this. Basically, in some environments, the exact details of which aren't understood, a Ctrl+C signal to the UI is being transmitted to all the process children. Looking at the output of "ps ax -O tpgid", its clear the main process is still the terminal owner of these processes. stty -a on a problematic system shows: "-ignbrk brkint" and on a working system shows: "-ignbrk -brkint" The description of brkint would suggest this is the problem, setting up that terminal environment wasn't able to reproduce the problem though. It was confirmed that using setsid() caused the problem to be resolved and is probably the right thing to be doing anyway, so lets do it. [YOCTO #6949] (Bitbake rev: 461aa73fff0ab616032d28c4fd0322eb88838be6) Signed-off-by: Richard Purdie --- bitbake/bin/bitbake-worker | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'bitbake/bin') diff --git a/bitbake/bin/bitbake-worker b/bitbake/bin/bitbake-worker index 371c99a677..8a24161250 100755 --- a/bitbake/bin/bitbake-worker +++ b/bitbake/bin/bitbake-worker @@ -156,8 +156,11 @@ def fork_off_task(cfg, data, workerdata, fn, task, taskname, appends, taskdepdat bb.event.worker_fire = worker_child_fire worker_pipe = pipeout - # Make the child the process group leader - os.setpgid(0, 0) + # Make the child the process group leader and ensure no + # child process will be controlled by the current terminal + # This ensures signals sent to the controlling terminal like Ctrl+C + # don't stop the child processes. + os.setsid() # No stdin newsi = os.open(os.devnull, os.O_RDWR) os.dup2(newsi, sys.stdin.fileno()) -- cgit v1.2.3-54-g00ecf