blob: 8751d9e3a8ab116dec9325147e9a0852471b8199 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/NonnullRefPtrVector.h>
#include <Kernel/FileSystem/Custody.h>
#include <Kernel/FileSystem/VirtualFileSystem.h>
#include <Kernel/Process.h>
namespace Kernel {
KResultOr<FlatPtr> Process::sys$fstat(int fd, Userspace<stat*> user_statbuf)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
REQUIRE_PROMISE(stdio);
auto description = TRY(fds().open_file_description(fd));
stat buffer = {};
TRY(description->stat(buffer));
return copy_to_user(user_statbuf, &buffer);
}
KResultOr<FlatPtr> Process::sys$stat(Userspace<const Syscall::SC_stat_params*> user_params)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
REQUIRE_PROMISE(rpath);
auto params = TRY(copy_typed_from_user(user_params));
auto path = TRY(get_syscall_path_argument(params.path));
RefPtr<Custody> base;
if (params.dirfd == AT_FDCWD) {
base = current_directory();
} else {
auto base_description = TRY(fds().open_file_description(params.dirfd));
if (!base_description->is_directory())
return ENOTDIR;
if (!base_description->custody())
return EINVAL;
base = base_description->custody();
}
auto metadata = TRY(VirtualFileSystem::the().lookup_metadata(path->view(), *base, params.follow_symlinks ? 0 : O_NOFOLLOW_NOERROR));
stat statbuf = {};
TRY(metadata.stat(statbuf));
return copy_to_user(params.statbuf, &statbuf);
}
}
|
