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38 lines
1.2 KiB
C
38 lines
1.2 KiB
C
/* ftruncate for SVR4 using the fcntl F_FREESP command.
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Copyright (C) 1995 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <string.h>
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/* Truncate the file FD refers to to LENGTH bytes. */
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int
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DEFUN(ftruncate, (fd, length),
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int fd AND off_t length)
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{
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struct flock fl;
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memset (&fl, 0, sizeof fl);
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fl.l_type = F_WRLCK;
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fl.l_start = length;
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return fcntl (fd, F_FREESP, &fl);
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}
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