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 "semihost-private.h"
37 #include <sys/types.h>
38 #include <sys/stat.h>
39 #include <fcntl.h>
40 #include <unistd.h>
41 #include <string.h>
42 #include <errno.h>
43
44 extern struct timeval __semihost_creat_time _ATTRIBUTE((__weak__));
45 extern int gettimeofday(struct timeval *restrict tv, void *restrict tz) _ATTRIBUTE((__weak__));
46
47 /*
48 * note: binary mode has been chosen below because otherwise
49 * files are treated on host side as text files which
50 * is most probably not intented. This means that
51 * data transfer is transparent between target and host.
52 */
53
54 int
open(const char * pathname,int flags,...)55 open(const char *pathname, int flags, ...)
56 {
57 int semiflags = 0;
58
59 switch (flags & (O_RDONLY|O_WRONLY|O_RDWR)) {
60 case O_RDONLY:
61 semiflags = SH_OPEN_R_B; /* 'rb' */
62 break;
63 case O_WRONLY:
64 if (flags & O_TRUNC)
65 semiflags = SH_OPEN_W_B; /* 'wb' */
66 else
67 semiflags = SH_OPEN_A_B; /* 'ab' */
68 break;
69 default:
70 if (flags & O_TRUNC)
71 semiflags = SH_OPEN_W_PLUS_B; /* 'wb+' */
72 else
73 semiflags = SH_OPEN_A_PLUS_B; /* 'ab+' */
74 break;
75 }
76
77 /* Make sure any stdout/stderr fds are allocated first */
78 (void) _map_stdio(0);
79 int ret;
80 do {
81 ret = sys_semihost_open(pathname, semiflags);
82 }
83 while (0 <= ret && ret <= 2);
84 if (ret == -1)
85 errno = sys_semihost_errno();
86 else if (&__semihost_creat_time && gettimeofday)
87 gettimeofday(&__semihost_creat_time, NULL);
88
89 return ret;
90 }
91
