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* sysdeps/unix/sysv/linux/opensock.c (__opensock): Use

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SOCK_CLOEXEC if available.
This commit is contained in:
Ulrich Drepper 2008-07-25 18:16:57 +00:00
parent 8ccf22f934
commit b206d8b166
2 changed files with 41 additions and 3 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
2008-07-25 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/opensock.c (__opensock): Use
SOCK_CLOEXEC if available.
* include/rpc/clnt.h: Declare __libc_clntudp_bufcreate and
__libc_clntudp_bufcreate_internal.
* include/sys/socket.h: Declare __have_sock_cloexec.

41
sysdeps/unix/sysv/linux/opensock.c
View file

@ -1,4 +1,4 @@
/* Copyright (C) 1999, 2001, 2002, 2007 Free Software Foundation, Inc.
/* Copyright (C) 1999, 2001, 2002, 2007, 2008 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
@ -22,6 +22,7 @@
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <kernel-features.h>
/* Return a socket of any type. The socket can be used in subsequent
ioctl calls to talk to the kernel. */
@ -70,7 +71,24 @@ __opensock (void)
{
assert (last_type != 0);
result = __socket (last_family, last_type, 0);
#ifdef SOCK_CLOEXEC
# ifndef __ASSUME_SOCK_CLOEXEC
if (__have_sock_cloexec >= 0)
# endif
{
result = __socket (last_family, last_type | SOCK_CLOEXEC, 0);
# ifndef __ASSUME_SOCK_CLOEXEC
if (__have_sock_cloexec == 0)
__have_sock_cloexec = result != -1 || errno != EINVAL ? 1 : -1;
# endif
}
#endif
#ifndef __ASSUME_SOCK_CLOEXEC
# ifdef SOCK_CLOEXEC
if (__have_sock_cloexec < 0)
# endif
result = __socket (last_family, last_type, 0);
#endif
if (result != -1 || errno != EAFNOSUPPORT)
/* Maybe the socket type isn't supported anymore (module is
unloaded). In this case again try to find the type. */
@ -105,7 +123,24 @@ __opensock (void)
if (afs[cnt].family == AF_NETROM || afs[cnt].family == AF_X25)
type = SOCK_SEQPACKET;
result = __socket (afs[cnt].family, type, 0);
#ifdef SOCK_CLOEXEC
# ifndef __ASSUME_SOCK_CLOEXEC
if (__have_sock_cloexec >= 0)
# endif
{
result = __socket (afs[cnt].family, type | SOCK_CLOEXEC, 0);
# ifndef __ASSUME_SOCK_CLOEXEC
if (__have_sock_cloexec == 0)
__have_sock_cloexec = result != -1 || errno != EINVAL ? 1 : -1;
# endif
}
#endif
#ifndef __ASSUME_SOCK_CLOEXEC
# ifdef SOCK_CLOEXEC
if (__have_sock_cloexec < 0)
# endif
result = __socket (afs[cnt].family, type, 0);
#endif
if (result != -1)
{
/* Found an available family. */