05/04/2006 07:55 AM, Vadim Lobanov wrote/a écrit:
Hi,
Hi!
:
A snippet from include/linux/limits.h:
#define PIPE_BUF 4096 /* # bytes in atomic write to a pipe */
PIPE_BUF is a bit of an oddity. It is defined there, then redefined in
the arm header files, even though those header files are never included
anywhere.
Actually, here, on a 2.6.16 source code, PIPE_BUF is used in
arch/sparc/kernel/sys_sunos.c, arch/sparc64/kernel/sys_sunos32.c, and
arch/sparc64/solaris/fs.c . It seems it's some kind of compatibility
value with Sun's OS...
Also, PIPE_BUF is never referenced by name in any of the Linux
code. And yet, it is still being mentioned in some Big And Scary
Warnings (tm): fs/autofs4/waitq.c or include/linux/pipe_fs_i.h, for
example.
Maybe they wanted to say PIPE_BUFFERS ? (just wild guess)
c u,
Eric
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