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f7a9f785 | 1 | /* Copyright (C) 1993-2016 Free Software Foundation, Inc. |
41bdb6e2 | 2 | This file is part of the GNU C Library. |
dfd2257a | 3 | |
41bdb6e2 AJ |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
dfd2257a | 8 | |
41bdb6e2 AJ |
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 | |
dfd2257a | 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
41bdb6e2 | 12 | Lesser General Public License for more details. |
dfd2257a | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. | |
dfd2257a | 17 | |
41bdb6e2 AJ |
18 | As a special exception, if you link the code in this file with |
19 | files compiled with a GNU compiler to produce an executable, | |
20 | that does not cause the resulting executable to be covered by | |
21 | the GNU Lesser General Public License. This exception does not | |
22 | however invalidate any other reasons why the executable file | |
23 | might be covered by the GNU Lesser General Public License. | |
24 | This exception applies to code released by its copyright holders | |
25 | in files containing the exception. */ | |
dfd2257a UD |
26 | |
27 | #include "libioP.h" | |
28 | #include "stdio.h" | |
94b7cc37 | 29 | #include <fcntl.h> |
1a35b7fd | 30 | #include <stdlib.h> |
94b7cc37 | 31 | #include <unistd.h> |
dfd2257a | 32 | |
c44a663d UD |
33 | #include <fd_to_filename.h> |
34 | ||
37233df9 TS |
35 | #include <kernel-features.h> |
36 | ||
dfd2257a | 37 | FILE * |
9d46370c | 38 | freopen64 (const char *filename, const char *mode, FILE *fp) |
dfd2257a | 39 | { |
dfd2257a UD |
40 | FILE *result; |
41 | CHECK_FILE (fp, NULL); | |
42 | if (!(fp->_flags & _IO_IS_FILEBUF)) | |
43 | return NULL; | |
0261d33f | 44 | _IO_acquire_lock (fp); |
94b7cc37 UD |
45 | int fd = _IO_fileno (fp); |
46 | const char *gfilename = (filename == NULL && fd >= 0 | |
47 | ? fd_to_filename (fd) : filename); | |
48 | fp->_flags2 |= _IO_FLAGS2_NOCLOSE; | |
d18ea0c5 | 49 | _IO_file_close_it (fp); |
e69dcccb | 50 | _IO_JUMPS_FILE_plus (fp) = &_IO_file_jumps; |
bbdef797 | 51 | if (_IO_vtable_offset (fp) == 0 && fp->_wide_data != NULL) |
15a686af | 52 | fp->_wide_data->_wide_vtable = &_IO_wfile_jumps; |
d18ea0c5 | 53 | result = _IO_file_fopen (fp, gfilename, mode, 0); |
94b7cc37 | 54 | fp->_flags2 &= ~_IO_FLAGS2_NOCLOSE; |
81c64d40 UD |
55 | if (result != NULL) |
56 | result = __fopen_maybe_mmap (result); | |
3b1de3ba | 57 | if (result != NULL) |
c44a663d | 58 | { |
94b7cc37 UD |
59 | /* unbound stream orientation */ |
60 | result->_mode = 0; | |
61 | ||
62 | if (fd != -1) | |
63 | { | |
64 | #ifdef O_CLOEXEC | |
65 | # ifndef __ASSUME_DUP3 | |
66 | int newfd; | |
67 | if (__have_dup3 < 0) | |
68 | newfd = -1; | |
69 | else | |
70 | newfd = | |
71 | # endif | |
dc70356c TS |
72 | __dup3 (_IO_fileno (result), fd, |
73 | (result->_flags2 & _IO_FLAGS2_CLOEXEC) != 0 | |
74 | ? O_CLOEXEC : 0); | |
94b7cc37 UD |
75 | #else |
76 | # define newfd 1 | |
77 | #endif | |
78 | ||
79 | #ifndef __ASSUME_DUP3 | |
80 | if (newfd < 0) | |
81 | { | |
82 | if (errno == ENOSYS) | |
83 | __have_dup3 = -1; | |
84 | ||
ed690b2f | 85 | __dup2 (_IO_fileno (result), fd); |
94b7cc37 UD |
86 | if ((result->_flags2 & _IO_FLAGS2_CLOEXEC) != 0) |
87 | __fcntl (fd, F_SETFD, FD_CLOEXEC); | |
88 | } | |
89 | #endif | |
90 | __close (_IO_fileno (result)); | |
91 | _IO_fileno (result) = fd; | |
92 | } | |
c44a663d | 93 | } |
94b7cc37 UD |
94 | else if (fd != -1) |
95 | __close (fd); | |
96 | if (filename == NULL) | |
97 | free ((char *) gfilename); | |
0261d33f | 98 | _IO_release_lock (fp); |
dfd2257a | 99 | return result; |
dfd2257a | 100 | } |