[PATCH] Use O_CLOEXEC for internal file descriptors

[Mark Kettenis]

> Date: Mon, 27 Feb 2012 10:41:15 -0800
> From: Alan Coopersmith <alan.coopersmith at oracle.com>
> 
> On 02/27/12 08:35 AM, Adam Jackson wrote:

> > Well, almost all of them.  zlib doesn't support "e" in the mode
> > string in gzopen() though it will silently accept and ignore it,
> > and Solaris appears not to support "e" in the mode string at all.
> 
> Right - I filed an enhancement request for that at one point but it
> hasn't been added yet, so for now, on Solaris we have to do
> 	fd = open(..., O_CLOEXEC);
> 	fp = fdopen(fd, ...);

That is of course a much better suggestion.  And it is possible to use
the same trick with gzdopen(3) to work around the fact that gzopen()
doesn't suppert "e", even on Linux systems.