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/*
* include/common/accept4.h
* Definition of the accept4 system call for older Linux libc.
*
* Copyright 2000-2012 Willy Tarreau <w@1wt.eu>
*
* This 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, version 2.1
* exclusively.
*
* This 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifndef _COMMON_ACCEPT4_H
#define _COMMON_ACCEPT4_H
#if defined (__linux__) && defined(USE_ACCEPT4)
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/syscall.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <common/syscall.h>
/* On recent Linux kernels, the accept4() syscall may be used to avoid an fcntl()
* call to set O_NONBLOCK on the resulting socket. It was introduced in Linux
* 2.6.28 and is not present in older libcs.
*/
#ifndef SOCK_NONBLOCK
#define SOCK_NONBLOCK O_NONBLOCK
#endif
#if defined(USE_MY_ACCEPT4) || (!defined(SYS_ACCEPT4) && !defined(__NR_accept4))
#if defined(CONFIG_HAP_LINUX_VSYSCALL) && defined(__linux__) && defined(__i386__)
/* The syscall is redefined somewhere else */
extern int accept4(int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags);
#elif ACCEPT4_USE_SOCKETCALL
static inline _syscall2(int, socketcall, int, call, unsigned long *, args);
static int accept4(int sockfd, struct sockaddr *addr, socklen_t *addrlen, int flags)
{
unsigned long args[4];
args[0] = (unsigned long)sockfd;
args[1] = (unsigned long)addr;
args[2] = (unsigned long)addrlen;
args[3] = (unsigned long)flags;
return socketcall(SYS_ACCEPT4, args);
}
#else
static inline _syscall4(int, accept4, int, sockfd, struct sockaddr *, addr, socklen_t *, addrlen, int, flags);
#endif /* VSYSCALL etc... */
#endif /* USE_MY_ACCEPT4 */
#endif /* __linux__ && USE_ACCEPT4 */
#endif /* _COMMON_ACCEPT4_H */
/*
* Local variables:
* c-indent-level: 8
* c-basic-offset: 8
* End:
*/
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