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authorEric Andersen2003-07-29 06:33:12 +0000
committerEric Andersen2003-07-29 06:33:12 +0000
commit9cdef5d9286839a0b787c25f41633508f8623765 (patch)
tree8305ff483e1c1348bb0436b176b63ec4cf53916e /console-tools
parent930c59675a6d9976f62578d2cd469190701b8616 (diff)
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busybox-9cdef5d9286839a0b787c25f41633508f8623765.tar.gz
Yang Xiaopeng writes:
>I'm sure that no user process use old root now, but when run "umount >/old_root", it says: > umount: /old_root: Device or resource busy > >I have tried to remount /proc within the new root *after* chroot, but >get the same result. > > I found the problem, I said that no user process use old root when run my scripts, but I'm wrong, actually there is a '3' fd open the file "/old_root/dev/console". By adding debug message in init/init.c, I found the problem: when init restart(in exec_signal()), before open the new terminal device, there is still a file opened(I don't know which file it is), so the terminal device(stdin) get fd '1', and the first dup(0)(stdout) return '2', the second(stderr) return '3'. I attach a simple patch to solve this problem.
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