libiberty/pex-unix vfork abuse?

[Ross Ridge]

Dave Korn writes:
>  Perhaps we could work around this case by setting environ in the parent
> before the vfork call and restoring it afterward, but we'd need kind of
> serialisation there, and I don't know how to do a critical section using
> pthreads/posix.

A simple solution would be to call fork() instead of vfork() when changing
the environment.

					Ross Ridge