glibc/sysdeps/generic/opensock.c
Ulrich Drepper f720d3d212 Update.
1999-10-27  Andreas Jaeger  <aj@suse.de>

	* sysdeps/generic/ifreq.h: New file.

	* resolv/res_hconf.c: Add missing includes to get all prototypes.
	(_res_hconf_reorder_addrs): Rewrite.  This never worked before.
	Reported by John DiMarco <jdd@cs.toronto.edu>.

	(_res_hconf_reorder_addrs): Made thread safe.
	(free_mem): New function, needed for malloc debugging.

1999-10-29  Andreas Jaeger  <aj@suse.de>

	* sysdeps/unix/sysv/linux/if_index.c (opensock): Move function to ...
	* sysdeps/generic/opensock.c (__opensock): ...here in a new file.
	* sysdeps/unix/sysv/linux/if_index.c: Change all callers of
	opensock to use __opensock.

	* socket/Makefile (routines): Add opensock.

	* include/sys/socket.h (__opensock): Add prototype declaration.
1999-10-29 21:40:21 +00:00

71 lines
1.9 KiB
C

/* Copyright (C) 1999 Free Software Foundation, Inc.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <stdio.h>
#include <sys/socket.h>
#include <bits/libc-lock.h>
/* Return a socket of any type. The socket can be used in subsequent
ioctl calls to talk to the kernel. */
int internal_function
__opensock (void)
{
/* Cache the last AF that worked, to avoid many redundant calls to
socket(). */
static int sock_af = -1;
int fd = -1;
__libc_lock_define_initialized (static, lock);
if (sock_af != -1)
{
fd = __socket (sock_af, SOCK_DGRAM, 0);
if (fd != -1)
return fd;
}
__libc_lock_lock (lock);
if (sock_af != -1)
fd = __socket (sock_af, SOCK_DGRAM, 0);
if (fd == -1)
{
#ifdef AF_INET
fd = __socket (sock_af = AF_INET, SOCK_DGRAM, 0);
#endif
#ifdef AF_INET6
if (fd < 0)
fd = __socket (sock_af = AF_INET6, SOCK_DGRAM, 0);
#endif
#ifdef AF_IPX
if (fd < 0)
fd = __socket (sock_af = AF_IPX, SOCK_DGRAM, 0);
#endif
#ifdef AF_AX25
if (fd < 0)
fd = __socket (sock_af = AF_AX25, SOCK_DGRAM, 0);
#endif
#ifdef AF_APPLETALK
if (fd < 0)
fd = __socket (sock_af = AF_APPLETALK, SOCK_DGRAM, 0);
#endif
}
__libc_lock_unlock (lock);
return fd;
}