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FreeBSD/Linux Kernel Cross Reference
sys/sys/ftruncate.c

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    1 /*
    2  * Copyright (c) 1992, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 4. Neither the name of the University nor the names of its contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  */
   29 
   30 #if defined(LIBC_SCCS) && !defined(lint)
   31 static char sccsid[] = "@(#)ftruncate.c 8.1 (Berkeley) 6/17/93";
   32 #endif /* LIBC_SCCS and not lint */
   33 #include <sys/cdefs.h>
   34 __FBSDID("$FreeBSD: stable/8/lib/libc/sys/ftruncate.c 171219 2007-07-04 23:27:38Z peter $");
   35 
   36 #include <sys/types.h>
   37 #include <sys/syscall.h>
   38 #include <unistd.h>
   39 #include "libc_private.h"
   40 
   41 /*
   42  * This function provides 64-bit offset padding that
   43  * is not supplied by GCC 1.X but is supplied by GCC 2.X.
   44  */
   45 int
   46 ftruncate(fd, length)
   47         int     fd;
   48         off_t   length;
   49 {
   50 
   51         if (__getosreldate() >= 700051)
   52                 return(__sys_ftruncate(fd, length));
   53         else
   54                 return(__sys_freebsd6_ftruncate(fd, 0, length));
   55 }

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