FreeBSD/Linux Kernel Cross Reference
sys/compat/linux/common/linux_time.c

     /* $NetBSD: linux_time.c,v 1.9 2005/02/26 23:10:19 perry 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. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the NetBSD
     *      Foundation, Inc. and its contributors.
     * 4. Neither the name of The NetBSD Foundation nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``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 FOUNDATION OR CONTRIBUTORS
     * 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>
    __KERNEL_RCSID(0, "$NetBSD: linux_time.c,v 1.9 2005/02/26 23:10:19 perry Exp $");
    
    #include <sys/param.h>
    #include <sys/ucred.h>
    #include <sys/mount.h>
    #include <sys/signal.h>
    #include <sys/stdint.h>
    #include <sys/time.h>
    #include <sys/systm.h>
    #include <sys/sa.h>
    #include <sys/syscallargs.h>
    
    #include <compat/linux/common/linux_types.h>
    #include <compat/linux/common/linux_signal.h>
    
    #include <compat/linux/linux_syscallargs.h>
    
    /*
     * This is not implemented for alpha yet
     */
    #if defined (__i386__) || defined (__m68k__) || \
        defined (__powerpc__) || defined (__mips__) || defined(__arm__)
    
    /*
     * Linux keeps track of a system timezone in the kernel. It is readen
     * by gettimeofday and set by settimeofday. This emulates this behavior
     * See linux/kernel/time.c
     */
    struct timezone linux_sys_tz;
    
    int linux_sys_gettimeofday(l, v, retval)
       struct lwp *l;
       void *v;
       register_t *retval;
    {
            struct linux_sys_gettimeofday_args /* {
                    syscallarg(struct timeval *) tz;
                    syscallarg(struct timezone *) tzp;
            } */ *uap = v;
            int error = 0;
    
            if (SCARG(uap, tp)) {
                    error = sys_gettimeofday (l, v, retval);
                    if (error)
                            return (error);
            }
    
            if (SCARG(uap, tzp)) {
                    error = copyout(&linux_sys_tz, SCARG(uap, tzp), sizeof(linux_sys_tz));
                    if (error)
                            return (error);
       }
    
            return (0);
    }
    
    int linux_sys_settimeofday(l, v, retval)
       struct lwp *l;
       void *v;
       register_t *retval;
   {
           struct linux_sys_settimeofday_args /* {
                   syscallarg(struct timeval *) tz;
                   syscallarg(struct timezone *) tzp;
           } */ *uap = v;
           int error = 0;
   
           if (SCARG(uap, tp)) {
                   error = sys_settimeofday(l, v, retval);
                   if (error)
                           return (error);
           }
   
           /*
            * If user is not the superuser, we returned
            * after the sys_settimeofday() call.
            */
           if (SCARG(uap, tzp)) {
                   error = copyin(SCARG(uap, tzp), &linux_sys_tz, sizeof(linux_sys_tz));
                   if (error)
                           return (error);
      }
   
           return (0);
   }
   
   #endif /* __i386__ || __m68k__ || __powerpc__ || __mips__ || __arm__ */

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