[krbdev.mit.edu #1547] Using fork instead of vfork

[Sam Hartman via RT]

There appears to be some problem using vfork in ftpd_popen.  The
symptoms seem to suggest that ls is getting a broken pipe signal.

Two possibilities exist.  Some strace output suggests that vfork is
returning 0 in the parent.  This would explain the problem, but would
be a fairly serious bug in Redhat.  However strace does suggest that
vfork is returning 0 in the parent.

An alternate explanation is that modifying file descriptors in the
child after calling vfork does not work well.


We have decided to use fork instead of vfork.