On 13 August 2012 23:49, Richard O'Keefe
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, http://www.gnu.org/software/gnulib/manual/html_node/fexecve.html says 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
.
FreeBSD 8.0 is covered. OpenBSD not covered OS X not covered http://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPa... 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. Alexander