Well in the IBM-paper is written:
but they are not defined in unistd.h here. In syscall.h they are also not:
The _syscallN macros are defined in /usr/include/linux/unistd.h and have the following format:
_syscall0( ret-type, func-name )
_syscall1( ret-type, func-name, arg1-type, arg1-name )
_syscall2( ret-type, func-name, arg1-type, arg1-name, arg2-type, arg2-name )
And as said I was told they would have become obsolete on newer kernels but I couldn't find an other methode to access them.
$ cat /usr/include/sys/syscall.h
/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#define _SYSCALL_H 1
/* This file should list the numbers of the system the system knows.
But instead of duplicating this we use the information available
from the kernel sources. */
/* The Linux kernel header file defines macros `__NR_<name>', but some
programs expect the traditional form `SYS_<name>'. So in building libc
we scan the kernel's list and produce <bits/syscall.h> with macros for
all the `SYS_' names. */
# include <bits/syscall.h>