[Haskell-cafe] createProcess running non-existent programs
alexander.kjeldaas at gmail.com
Tue Aug 14 10:42:57 CEST 2012
On 13 August 2012 23:49, Richard O'Keefe <ok at cs.otago.ac.nz> wrote:
> On 13/08/2012, at 11:26 PM, Alexander Kjeldaas wrote:
> > This isn't that hard - a pipe shouldn't be needed anymore. Just require
> a post-2003 glibc.
> > fexecve is a system call in most BSDs. It is also implemented in glibc
> using a /proc hack.
> fexecve is now in the Single Unix Specification, based on
> POSIX as of 2008, I believe. However,
> Portability problems not fixed by Gnulib:
> * This function is missing on many non-glibc platforms: MacOS X 10.5,
> FreeBSD 6.0,
> NetBSD 5.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5,
> OSF/1 5.1,
> Solaris 11 2010-11, Cygwin 1.5.x, mingw, MSVC 9, Interix 3.5, BeOS.
> That warning doesn't seem to be fully up to date. I'm using MacOS X 10.6.8
> and fexecve() isn't in the manuals or in <unistd.h>.
FreeBSD 8.0 is covered.
OpenBSD not covered
OS X not covered
Solaris probably not covered.
So support is pretty good, I'd say. For non-modern systems, checking the
existence of the file first is possible. The race isn't important, and one
can always upgrade to a modern operating system.
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