reentr.c: Handle getspnam()

This has never worked to increase the buffer size if necessary.
Apparently the default has always been big enough.  But this commit
fixes it to retry if too small.

I don't think there is a way to write tests for this.  getspnam is
called only as a small part of pp_gpwent, and is not part of the API,
and is called only when run as root.

I did test it on my box, with gdb, starting with a buffer size of 1, and
single stepping and observing that it works as I expected.

0 files changed, 0 insertions, 0 deletions