| 1 | /* Open a stdio stream on an anonymous temporary file. Hurd version. |
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| 2 | Copyright (C) 2001-2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <stdio.h> |
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| 20 | #include <hurd.h> |
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| 21 | #include <hurd/fs.h> |
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| 22 | #include <hurd/fd.h> |
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| 23 | #include <fcntl.h> |
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| 24 | #include <unistd.h> |
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| 25 | #include <iolibio.h> |
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| 26 | |
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| 27 | /* This returns a new stream opened on a temporary file (generated |
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| 28 | by tmpnam). The file is opened with mode "w+b" (binary read/write). |
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| 29 | If we couldn't generate a unique filename or the file couldn't |
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| 30 | be opened, NULL is returned. */ |
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| 31 | FILE * |
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| 32 | __tmpfile (void) |
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| 33 | { |
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| 34 | error_t err; |
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| 35 | file_t file; |
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| 36 | int fd; |
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| 37 | FILE *f; |
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| 38 | |
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| 39 | /* Get a port to the directory that will contain the file. */ |
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| 40 | const char *dirname = __libc_secure_getenv ("TMPDIR" ) ?: P_tmpdir; |
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| 41 | file_t dir = __file_name_lookup (dirname, 0, 0); |
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| 42 | if (dir == MACH_PORT_NULL) |
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| 43 | return NULL; |
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| 44 | |
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| 45 | /* Create an unnamed file in the temporary directory. */ |
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| 46 | err = __dir_mkfile (dir, O_RDWR, S_IRUSR | S_IWUSR, &file); |
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| 47 | __mach_port_deallocate (__mach_task_self (), dir); |
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| 48 | if (err) |
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| 49 | return __hurd_fail (err), NULL; |
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| 50 | |
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| 51 | /* Get a file descriptor for that port. POSIX.1 requires that streams |
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| 52 | returned by tmpfile allocate file descriptors as fopen would. */ |
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| 53 | fd = _hurd_intern_fd (file, O_RDWR, 1); /* dealloc on error */ |
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| 54 | if (fd < 0) |
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| 55 | return NULL; |
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| 56 | |
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| 57 | /* Open a stream on the unnamed file. |
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| 58 | It will cease to exist when this stream is closed. */ |
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| 59 | if ((f = _IO_fdopen (fd, "w+b" )) == NULL) |
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| 60 | __close (fd); |
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| 61 | |
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| 62 | return f; |
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| 63 | } |
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| 64 | |
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| 65 | #include <shlib-compat.h> |
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| 66 | versioned_symbol (libc, __tmpfile, tmpfile, GLIBC_2_1); |
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| 67 | |
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| 68 | weak_alias (__tmpfile, tmpfile64) |
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| 69 | |
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