On Thu, Nov 28, 2013 at 8:21 PM, Gregor Best <g...@ring0.de> wrote: >> [...] >> anon = (char*)mmap(NULL, 4096, PROT_READ|PROT_WRITE, >> MAP_ANON|MAP_SHARED, -1, 0); >> >> that probably means it may not be that portable after all. Thanks for >> making me aware of it in any case. >> [...] > > *BSD has it, and one of the Gentoo machines I have access to has it too, > and so does an Ubuntu server for work. Manpages on all machines contain > at least a small paragraph about anonymous mappings and both mention > that fd should be -1 in that case. Looks portable enough.
Turns out I was looking at the wrong section. The mmap (3p) man page does not mention it (since it's not a POSIX conform function), but mmap (2) does. My bad.
