1/* Open a stdio stream on an anonymous temporary file. Generic/POSIX version. 2 Copyright (C) 1991,93,1996-2000,2002,2003 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, write to the Free 17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 18 02111-1307 USA. */ 19 20#include <stdio_private.h> 21#include <unistd.h> 22 23#ifdef USE_IN_LIBIO 24# include <iolibio.h> 25# define __fdopen INTUSE(_IO_fdopen) 26# ifndef tmpfile 27# define tmpfile __new_tmpfile 28# endif 29#endif 30 31#ifndef GEN_THIS 32# define GEN_THIS __GT_FILE 33#endif 34 35/* This returns a new stream opened on a temporary file (generated 36 by tmpnam). The file is opened with mode "w+b" (binary read/write). 37 If we couldn't generate a unique filename or the file couldn't 38 be opened, NULL is returned. */ 39FILE * 40tmpfile (void) 41{ 42 char buf[FILENAME_MAX]; 43 int fd; 44 FILE *f; 45 46 if (__path_search (buf, FILENAME_MAX, NULL, "tmpf", 0)) 47 return NULL; 48 fd = __gen_tempname (buf, GEN_THIS); 49 if (fd < 0) 50 return NULL; 51 52 /* Note that this relies on the Unix semantics that 53 a file is not really removed until it is closed. */ 54 (void) __unlink (buf); 55 56 if ((f = __fdopen (fd, "w+b")) == NULL) 57 __close (fd); 58 59 return f; 60} 61 62#if defined USE_IN_LIBIO && GEN_THIS == __GT_FILE /* Not for tmpfile64. */ 63# undef tmpfile 64# include <shlib-compat.h> 65versioned_symbol (libc, __new_tmpfile, tmpfile, GLIBC_2_1); 66#endif 67