tmpfile.c

来自「一个C源代码分析器」· C语言 代码 · 共 44 行

/* Copyright (C) 1991, 1993 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB.  If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

#include <ansidecl.h>
#include <stdio.h>


/* This returns a new stream opened on a temporary file (generated
   by tmpnam) The file is opened with mode "w+b" (binary read/write).
   If we couldn't generate a unique filename or the file couldn't
   be opened, NULL is returned.  */
FILE *
DEFUN_VOID(tmpfile)
{
  char *filename;
  FILE *f;

  filename = __stdio_gen_tempname ((char *) NULL, "tmpf", 0,
				   (size_t *) NULL, &f);
  if (filename == NULL)
    return NULL;

  /* Note that this relies on the Unix semantics that
     a file is not really removed until it is closed.  */
  (void) remove (filename);

  return f;
}