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27114e20 | 1 | /* Open a stdio stream on an anonymous temporary file. Generic/POSIX version. |
d7e23b02 UD |
2 | Copyright (C) 1991,1993,1996-2000,2002,2003,2007 |
3 | Free Software Foundation, Inc. | |
f8b87ef0 UD |
4 | This file is part of the GNU C Library. |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
f8b87ef0 UD |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
f8b87ef0 | 15 | |
41bdb6e2 AJ |
16 | You should have received a copy of the GNU Lesser General Public |
17 | License along with the GNU C Library; if not, write to the Free | |
18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
19 | 02111-1307 USA. */ | |
28f540f4 | 20 | |
d7e23b02 | 21 | #include <fcntl.h> |
28f540f4 | 22 | #include <stdio.h> |
9fbffc46 | 23 | #include <unistd.h> |
28f540f4 | 24 | |
7ce241a0 UD |
25 | #ifdef USE_IN_LIBIO |
26 | # include <iolibio.h> | |
77fe0b9c | 27 | # define __fdopen INTUSE(_IO_fdopen) |
650f6700 RM |
28 | # ifndef tmpfile |
29 | # define tmpfile __new_tmpfile | |
30 | # endif | |
7cabd57c | 31 | #endif |
28f540f4 | 32 | |
337738b7 | 33 | |
28f540f4 | 34 | /* This returns a new stream opened on a temporary file (generated |
7ce241a0 | 35 | by tmpnam). The file is opened with mode "w+b" (binary read/write). |
28f540f4 RM |
36 | If we couldn't generate a unique filename or the file couldn't |
37 | be opened, NULL is returned. */ | |
38 | FILE * | |
7ce241a0 | 39 | tmpfile (void) |
28f540f4 | 40 | { |
d68171ed | 41 | char buf[FILENAME_MAX]; |
7cabd57c | 42 | int fd; |
28f540f4 RM |
43 | FILE *f; |
44 | ||
60876a75 | 45 | if (__path_search (buf, FILENAME_MAX, NULL, "tmpf", 0)) |
7cabd57c | 46 | return NULL; |
d7e23b02 UD |
47 | int flags = 0; |
48 | #ifdef FLAGS | |
49 | flags = FLAGS; | |
50 | #endif | |
51 | fd = __gen_tempname (buf, flags, __GT_FILE); | |
7ce241a0 | 52 | if (fd < 0) |
28f540f4 RM |
53 | return NULL; |
54 | ||
55 | /* Note that this relies on the Unix semantics that | |
56 | a file is not really removed until it is closed. */ | |
f1c30c98 | 57 | (void) __unlink (buf); |
7cabd57c | 58 | |
7ce241a0 UD |
59 | if ((f = __fdopen (fd, "w+b")) == NULL) |
60 | __close (fd); | |
28f540f4 RM |
61 | |
62 | return f; | |
63 | } | |
7ce241a0 | 64 | |
d7e23b02 | 65 | #if defined USE_IN_LIBIO && !defined FLAGS /* Not for tmpfile64. */ |
7ce241a0 | 66 | # undef tmpfile |
9010d7f8 RM |
67 | # include <shlib-compat.h> |
68 | versioned_symbol (libc, __new_tmpfile, tmpfile, GLIBC_2_1); | |
7ce241a0 | 69 | #endif |