1 /*
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright © 2019 Keith Packard
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above
14 * copyright notice, this list of conditions and the following
15 * disclaimer in the documentation and/or other materials provided
16 * with the distribution.
17 *
18 * 3. Neither the name of the copyright holder nor the names of its
19 * contributors may be used to endorse or promote products derived
20 * from this software without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
23 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
24 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
25 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
26 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
29 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
31 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
33 * OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35
36 #include "stdio_private.h"
37 #include <stdlib.h>
38 #include <unistd.h>
39
40 static char write_buf[BUFSIZ];
41 static char read_buf[BUFSIZ];
42
43 static struct __file_bufio __stdin = FDEV_SETUP_POSIX(0, read_buf, BUFSIZ, __SRD, 0);
44 static struct __file_bufio __stdout = FDEV_SETUP_POSIX(1, write_buf, BUFSIZ, __SWR, __BLBF);
45
46 FILE *const __posix_stdin = &__stdin.xfile.cfile.file;
47 FILE *const __posix_stdout = &__stdout.xfile.cfile.file;
48
49 #ifdef __strong_reference
50 __strong_reference(__posix_stdout, __posix_stderr);
51 #else
52 FILE *const __posix_stderr = &__stdout.xfile.cfile.file;
53 #endif
54
55 __weak_reference(__posix_stdin,stdin);
56 __weak_reference(__posix_stdout,stdout);
57 __weak_reference(__posix_stderr,stderr);
58
59 __attribute__((constructor))
posix_init(void)60 static void posix_init(void)
61 {
62 __bufio_lock_init(&__stdin.xfile.cfile.file);
63 __bufio_lock_init(&__stdout.xfile.cfile.file);
64 }
65
66 /*
67 * Add a destructor function to get stdout flushed on
68 * exit
69 */
70 __attribute__((destructor (101)))
posix_exit(void)71 static void posix_exit(void)
72 {
73 fflush(stdout);
74 }
75
