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SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
45 lines
1.2 KiB
C++
45 lines
1.2 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/FileSystem/Custody.h>
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#include <Kernel/FileSystem/FileDescription.h>
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#include <Kernel/FileSystem/InodeWatcher.h>
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#include <Kernel/Process.h>
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namespace Kernel {
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KResultOr<int> Process::sys$watch_file(Userspace<const char*> user_path, size_t path_length)
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{
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REQUIRE_PROMISE(rpath);
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auto path = get_syscall_path_argument(user_path, path_length);
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if (path.is_error())
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return path.error();
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auto custody_or_error = VFS::the().resolve_path(path.value(), current_directory());
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if (custody_or_error.is_error())
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return custody_or_error.error();
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auto& custody = custody_or_error.value();
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auto& inode = custody->inode();
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if (!inode.fs().supports_watchers())
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return ENOTSUP;
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int fd = alloc_fd();
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if (fd < 0)
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return fd;
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auto description = FileDescription::create(*InodeWatcher::create(inode));
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if (description.is_error())
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return description.error();
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m_fds[fd].set(description.release_value());
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m_fds[fd].description()->set_readable(true);
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return fd;
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}
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}
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