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 <fcntl.h>
39 #include <unistd.h>
40
41 FILE *
fdopen(int fd,const char * mode)42 fdopen(int fd, const char *mode)
43 {
44 int stdio_flags;
45 int open_flags;
46 struct __file_bufio *bf;
47 char *buf;
48
49 stdio_flags = __posix_sflags(mode, &open_flags);
50 if (stdio_flags == 0)
51 return NULL;
52
53 /* Allocate file structure and necessary buffers */
54 bf = calloc(1, sizeof(struct __file_bufio) + BUFSIZ);
55
56 if (bf == NULL) {
57 close(fd);
58 return NULL;
59 }
60 buf = (char *) (bf + 1);
61
62 *bf = (struct __file_bufio)
63 FDEV_SETUP_POSIX(fd, buf, BUFSIZ, stdio_flags, 0);
64
65 __bufio_lock_init(&(bf->xfile.cfile.file));
66
67 if (open_flags & O_APPEND)
68 (void) fseeko(&(bf->xfile.cfile.file), 0, SEEK_END);
69
70 return &(bf->xfile.cfile.file);
71 }
72
