Update.
[glibc.git] / stdio-common / tmpfile.c
blob4a9e4e2e0a849601a9d9c018980067edc4da2442
1 /* Copyright (C) 1991, 1993, 1996, 1997, 1998 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
19 #include <stdio.h>
20 #include <unistd.h>
22 #ifdef USE_IN_LIBIO
23 # include <iolibio.h>
24 # define __fdopen _IO_fdopen
25 # define tmpfile __new_tmpfile
26 #endif
28 /* This returns a new stream opened on a temporary file (generated
29 by tmpnam). The file is opened with mode "w+b" (binary read/write).
30 If we couldn't generate a unique filename or the file couldn't
31 be opened, NULL is returned. */
32 FILE *
33 tmpfile (void)
35 char buf[FILENAME_MAX];
36 int fd;
37 FILE *f;
39 if (__path_search (buf, FILENAME_MAX, NULL, "tmpf"))
40 return NULL;
41 fd = __gen_tempname (buf, 1, 0);
42 if (fd < 0)
43 return NULL;
45 /* Note that this relies on the Unix semantics that
46 a file is not really removed until it is closed. */
47 (void) remove (buf);
49 if ((f = __fdopen (fd, "w+b")) == NULL)
50 __close (fd);
52 return f;
55 #ifdef USE_IN_LIBIO
56 # undef tmpfile
57 # if defined PIC && DO_VERSIONING
58 default_symbol_version (__new_tmpfile, tmpfile, GLIBC_2.1);
59 # else
60 # ifdef weak_alias
61 weak_alias (__new_tmpfile, tmpfile)
62 # endif
63 # endif
64 #endif