/* Truncate a file given by name.  Generic POSIX.1 version.

   Copyright (C) 1995-2018 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

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#include <sys/types.h>

#include <errno.h>

#include <unistd.h>

#include <fcntl.h>

/* Truncate PATH to LENGTH bytes.  */

int

__truncate (const char *path, off_t length)

{

  int fd, ret, save;

  fd = __open (path, O_WRONLY | (length == 0 ? O_TRUNC : 0));

  if (fd < 0)

    return -1;

  if (length == 0)

    ret = 0;

  else

    ret = __ftruncate (fd, length);

  save = errno;

  (void) __close (fd);

  if (ret < 0)

    __set_errno (save);

  return ret;

}

weak_alias (__truncate, truncate)