[Dovecot] POSIX stupidity

[Remi Gacogne]

Le jeudi 30 juillet 2009, Timo Sirainen a écrit :

> > What the hell were POSIX people thinking?? This is the first syscall
> > I've seen that behaves like this, and apparently without any good
> > reason! Wonder how many other new system calls there are like this, that
> > I haven't noticed yet..
>
> Looks like all posix_*() syscalls do that. Wonder if there are more.

Looks like too many people were incorrectly using errno, especially in multi-
threaded context.

From http://www.unix.org/whitepapers/reentrant.html :

"In addition, all POSIX.1c functions avoid using errno and, instead, return 
the error number directly as the function return value, with a return value of 
zero indicating that no error was detected. This strategy is, in fact, being 
followed on a POSIX-wide basis for all new functions. "