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Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include <Kernel/Syscall.h>
28#include <errno.h>
29#include <fcntl.h>
30#include <stdarg.h>
31#include <string.h>
32
33extern "C" {
34
35int fcntl(int fd, int cmd, ...)
36{
37 va_list ap;
38 va_start(ap, cmd);
39 u32 extra_arg = va_arg(ap, u32);
40 int rc = syscall(SC_fcntl, fd, cmd, extra_arg);
41 __RETURN_WITH_ERRNO(rc, rc, -1);
42}
43
44int watch_file(const char* path, size_t path_length)
45{
46 int rc = syscall(SC_watch_file, path, path_length);
47 __RETURN_WITH_ERRNO(rc, rc, -1);
48}
49
50int creat(const char* path, mode_t mode)
51{
52 return open(path, O_CREAT | O_WRONLY | O_TRUNC, mode);
53}
54
55int creat_with_path_length(const char* path, size_t path_length, mode_t mode)
56{
57 return open_with_path_length(path, path_length, O_CREAT | O_WRONLY | O_TRUNC, mode);
58}
59
60int open_with_path_length(const char* path, size_t path_length, int options, mode_t mode)
61{
62 return openat_with_path_length(AT_FDCWD, path, path_length, options, mode);
63}
64
65int openat_with_path_length(int dirfd, const char* path, size_t path_length, int options, mode_t mode)
66{
67 if (!path) {
68 errno = EFAULT;
69 return -1;
70 }
71 if (path_length > INT32_MAX) {
72 errno = EINVAL;
73 return -1;
74 }
75 Syscall::SC_open_params params { dirfd, { path, path_length }, options, mode };
76 int rc = syscall(SC_open, ¶ms);
77 __RETURN_WITH_ERRNO(rc, rc, -1);
78}
79
80int open(const char* path, int options, ...)
81{
82 if (!path) {
83 errno = EFAULT;
84 return -1;
85 }
86 va_list ap;
87 va_start(ap, options);
88 auto mode = (mode_t)va_arg(ap, unsigned);
89 va_end(ap);
90 return open_with_path_length(path, strlen(path), options, mode);
91}
92
93int openat(int dirfd, const char* path, int options, ...)
94{
95 if (!path) {
96 errno = EFAULT;
97 return -1;
98 }
99 va_list ap;
100 va_start(ap, options);
101 auto mode = (mode_t)va_arg(ap, unsigned);
102 va_end(ap);
103 return openat_with_path_length(dirfd, path, strlen(path), options, mode);
104}
105}