> Is there an existing Linux/Unix mechanism to force fds closed
> on fork() that I am unaware of?
They exist only for exec - since within just a fork() the situation
is under your control. It is your fault if you forget to close() it - the
kernel isnt there to baby you - and if you want it to you can write a nice
fork wrapper that asks the library to close handles it is using.
> If not, before I hack one in as a private kernel patch, is
> there any reason to add such a mechanism, perhaps a FD_CLOFORK
> flag, and does anybody have suggestions on where to start?
FD_CLOFORK is the logical way to do it so that it matches FD_CLOEXEC. Think
hard about the semantics for threaded applications where they share the
same file handles when doing this.
Alan
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