| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Open a stdio stream on an anonymous temporary file. Generic/POSIX version. |
| 2 | Copyright (C) 1991-2016 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, see |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <fcntl.h> |
| 20 | #include <stdio.h> |
| 21 | #include <unistd.h> |
| 22 | |
| 23 | #include <iolibio.h> |
| 24 | #define __fdopen _IO_fdopen |
| 25 | #ifndef tmpfile |
| 26 | # define tmpfile __new_tmpfile |
| 27 | #endif |
| 28 | |
| 29 | |
| 30 | /* This returns a new stream opened on a temporary file (generated |
| 31 | by tmpnam). The file is opened with mode "w+b" (binary read/write). |
| 32 | If we couldn't generate a unique filename or the file couldn't |
| 33 | be opened, NULL is returned. */ |
| 34 | FILE * |
| 35 | tmpfile (void) |
| 36 | { |
| 37 | char buf[FILENAME_MAX]; |
| 38 | int fd; |
| 39 | FILE *f; |
| 40 | |
| 41 | if (__path_search (buf, FILENAME_MAX, NULL, "tmpf", 0)) |
| 42 | return NULL; |
| 43 | int flags = 0; |
| 44 | #ifdef FLAGS |
| 45 | flags = FLAGS; |
| 46 | #endif |
| 47 | fd = __gen_tempname (buf, 0, flags, __GT_FILE); |
| 48 | if (fd < 0) |
| 49 | return NULL; |
| 50 | |
| 51 | /* Note that this relies on the Unix semantics that |
| 52 | a file is not really removed until it is closed. */ |
| 53 | (void) __unlink (buf); |
| 54 | |
| 55 | if ((f = __fdopen (fd, "w+b")) == NULL) |
| 56 | __close (fd); |
| 57 | |
| 58 | return f; |
| 59 | } |
| 60 | |
| 61 | #if !defined O_LARGEFILE || O_LARGEFILE == 0 |
| 62 | weak_alias (__new_tmpfile, tmpfile64) |
| 63 | #endif |
| 64 | |
| 65 | #ifndef FLAGS /* Not for tmpfile64. */ |
| 66 | # undef tmpfile |
| 67 | # include <shlib-compat.h> |
| 68 | versioned_symbol (libc, __new_tmpfile, tmpfile, GLIBC_2_1); |
| 69 | #endif |