[patch] Close fds before execute a cmd

[Martin Hunt]

On Tue, 2007-10-09 at 14:10 +0900, Lai Jiangshan wrote:
[...]
> 	I traced this bug and at the last I found the reason: stapio
> did not close some file descriptors before using execl() to run a cmd.
> The processes of this cmd may read or write on the fds inherited from
> stapio. Especially the fd of control_channel, if one of processes of
> this cmd reads and writes on this fd, it communicates with stap_XXXXXX.ko,
> and lots of BUGs occurred. (Does stap_XXXXXX.ko support communicating
> with two or more processes at the same time?)

Thank you for reporting this bug.  I have checked in a patch to set the
FD_CLOEXEC flags for all files stapio opens. 

Martin