Avoid array-bounds warning for strncat on i586 (bug 20260)
[glibc.git] / socket / opensock.c
blob19b96192c4c0b45e1d99c255dfb0431ccab5b0f2
1 /* Copyright (C) 1999-2016 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
18 #include <stdio.h>
19 #include <sys/socket.h>
20 #include <libc-lock.h>
22 /* Return a socket of any type. The socket can be used in subsequent
23 ioctl calls to talk to the kernel. */
24 int internal_function
25 __opensock (void)
27 /* Cache the last AF that worked, to avoid many redundant calls to
28 socket(). */
29 static int sock_af = -1;
30 int fd = -1;
31 __libc_lock_define_initialized (static, lock);
33 if (sock_af != -1)
35 fd = __socket (sock_af, SOCK_DGRAM, 0);
36 if (fd != -1)
37 return fd;
40 __libc_lock_lock (lock);
42 if (sock_af != -1)
43 fd = __socket (sock_af, SOCK_DGRAM, 0);
45 if (fd == -1)
47 #ifdef AF_INET
48 fd = __socket (sock_af = AF_INET, SOCK_DGRAM, 0);
49 #endif
50 #ifdef AF_INET6
51 if (fd < 0)
52 fd = __socket (sock_af = AF_INET6, SOCK_DGRAM, 0);
53 #endif
54 #ifdef AF_IPX
55 if (fd < 0)
56 fd = __socket (sock_af = AF_IPX, SOCK_DGRAM, 0);
57 #endif
58 #ifdef AF_AX25
59 if (fd < 0)
60 fd = __socket (sock_af = AF_AX25, SOCK_DGRAM, 0);
61 #endif
62 #ifdef AF_APPLETALK
63 if (fd < 0)
64 fd = __socket (sock_af = AF_APPLETALK, SOCK_DGRAM, 0);
65 #endif
68 __libc_lock_unlock (lock);
69 return fd;