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authorUlrich Drepper <drepper@redhat.com>2004-12-22 20:10:10 +0000
committerUlrich Drepper <drepper@redhat.com>2004-12-22 20:10:10 +0000
commita334319f6530564d22e775935d9c91663623a1b4 (patch)
treeb5877475619e4c938e98757d518bb1e9cbead751 /sysdeps/generic/opensock.c
parent0ecb606cb6cf65de1d9fc8a919bceb4be476c602 (diff)
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(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.
Diffstat (limited to 'sysdeps/generic/opensock.c')
-rw-r--r--sysdeps/generic/opensock.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/sysdeps/generic/opensock.c b/sysdeps/generic/opensock.c
new file mode 100644
index 0000000..4a4d5dd
--- /dev/null
+++ b/sysdeps/generic/opensock.c
@@ -0,0 +1,71 @@
+/* Copyright (C) 1999 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. */
+
+#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;
+}