On Sun, 2 Sep 2012 12:43:58 +0200 Cedric Blancher wrote: > On 2 September 2012 06:04, Glenn Fowler <g...@research.att.com> wrote: > > > > is there any rationale for there being no *at() variant for > > > > chdir() > > truncate()
> If I remember it right from the old POSIX conf calls: Everything which > requires to access a file's content and has a f* function should go > through openat()+f*(). In this case this means you'd have to call > openat() to get a file handle and use ftruncate(). > chdir() has explicitly no at version because the same basic rule > (replace "file's content" with "directory's content") applies: Use > openat() with O_SEARCH+fchdir(). It's two syscalls but it's almost > having identical performance. And you always have the directory fd > around for later usage :) thanks and I'll keep that "2 syscalls almost the same as 1" in my back pocket _______________________________________________ ast-developers mailing list ast-developers@research.att.com https://mailman.research.att.com/mailman/listinfo/ast-developers
