f14fb60209
* Updating common/lib * Updating lib/csu * Updating lib/libc * Updating libexec/ld.elf_so * Corrected test on __minix in featuretest to actually follow the meaning of the comment. * Cleaned up _REENTRANT-related defintions. * Disabled -D_REENTRANT for libfetch * Removing some unneeded __NBSD_LIBC defines and tests Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
99 lines
3.1 KiB
C
99 lines
3.1 KiB
C
/* $NetBSD: settimeofday.c,v 1.14 2011/10/15 23:00:02 christos Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 2001 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Emmanuel Dreyfus.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
__RCSID("$NetBSD: settimeofday.c,v 1.14 2011/10/15 23:00:02 christos Exp $");
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#include "namespace.h"
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/ioctl.h>
|
|
#include <sys/syscall.h>
|
|
|
|
#include <sys/clockctl.h>
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <paths.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
#include <unistd.h>
|
|
|
|
#if defined(__minix) && !defined(O_CLOEXEC)
|
|
#define O_CLOEXEC 0
|
|
#endif
|
|
|
|
int __clockctl_fd = -1;
|
|
|
|
int ____settimeofday50(const struct timeval *, const void *);
|
|
|
|
int
|
|
settimeofday(const struct timeval *tv, const void *tzp)
|
|
{
|
|
struct clockctl_settimeofday args;
|
|
int rv;
|
|
|
|
/*
|
|
* try syscal first and attempt to switch to clockctl
|
|
* if that fails with EPERM
|
|
*/
|
|
if (__clockctl_fd == -1) {
|
|
rv = ____settimeofday50(tv, tzp);
|
|
|
|
/*
|
|
* switch to clockctl if we fail with EPERM, this
|
|
* may be cause by an attempt to set the time backwards
|
|
* but we should leave the access permission checking
|
|
* entirely to the kernel
|
|
*/
|
|
if (rv != -1 || errno != EPERM)
|
|
return rv;
|
|
|
|
__clockctl_fd = open(_PATH_CLOCKCTL, O_WRONLY | O_CLOEXEC, 0);
|
|
if (__clockctl_fd == -1) {
|
|
/* original error was EPERM - don't leak open errors */
|
|
errno = EPERM;
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If __clockctl_fd >=0, clockctl has already been open
|
|
* and used, so we carry on using it.
|
|
*/
|
|
args.tv = tv;
|
|
args.tzp = tzp;
|
|
return ioctl(__clockctl_fd, CLOCKCTL_SETTIMEOFDAY, &args);
|
|
}
|