Commit 77293034 authored Jul 17, 2007 by Roland McGrath Committed by Linus Torvalds Jul 17, 2007

Remove OPEN_MAX

The OPEN_MAX macro in limits.h should not be there. It claims to be the
limit on file descriptors in a process, but its value is wrong for that.
There is no constant value, but a variable resource limit (RLIMIT_NOFILE).
Nothing in the kernel uses OPEN_MAX except things that are wrong to do so.
I've submitted other patches to remove those uses.

The proper thing to do according to POSIX is not to define OPEN_MAX at all.
The sysconf (_SC_OPEN_MAX) implementation works by calling getrlimit.

Signed-off-by: Roland McGrath <roland@redhat.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent c09edd6e

include/linux/limits.h

+0 −1

Original line number	Diff line number	Diff line
		@@ -6,7 +6,6 @@
		#define NGROUPS_MAX 65536 /* supplemental group IDs are available */
		#define ARG_MAX 131072 /* # bytes of args + environ for exec() */
		#define CHILD_MAX 999 /* no limit :-) */
		#define OPEN_MAX 256 /* # open files a process may have */
		#define LINK_MAX 127 /* # links a file may have */
		#define MAX_CANON 255 /* size of the canonical input queue */
		#define MAX_INPUT 255 /* size of the type-ahead buffer */