[PATCH] really close all extra fds in bb_daemonize_or_rexec

[Andreas Wetzel]

hi,

the current implementation seems not to reliably close all open file 
descriptors if the flag DAEMON_CLOSE_EXTRA_FDS is set. it is assumed, 
that the fd returned by opening a file (bb_dev_null) is the top-most fd, 
but this is not true. open returns the first free fd. so, potentially, 
some fds remain open.

the attached patch fixes this by calling close() on every possible file 
descriptor (diffed against the busybox_1_9_stable branch).

cheers,
andi


-- 
Andreas Wetzel          Core Software Engineer
BridgeCo AG             Direct    +41 44 802 33 19
Ringstrasse 14          Phone     +41 44 802 33 33
CH-8600 Dübendorf       Fax       +41 44 802 33 39
Switzerland             mailto:andreas.wetzel at bridgeco.net
                         http://www.bridgeco.net
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