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9201a06027
Before we start disabling acquisition of the big process lock for specific syscalls, make sure to document and assert that all the lock is held during all syscalls.
50 lines
1.3 KiB
C++
50 lines
1.3 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/FileDescription.h>
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#include <Kernel/Process.h>
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#include <Kernel/TTY/MasterPTY.h>
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#include <Kernel/TTY/TTY.h>
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namespace Kernel {
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KResultOr<FlatPtr> Process::sys$ttyname(int fd, Userspace<char*> buffer, size_t size)
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
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REQUIRE_PROMISE(tty);
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auto description = fds().file_description(fd);
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if (!description)
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return EBADF;
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if (!description->is_tty())
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return ENOTTY;
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auto tty_name = description->tty()->tty_name();
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if (size < tty_name.length() + 1)
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return ERANGE;
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if (!copy_to_user(buffer, tty_name.characters(), tty_name.length() + 1))
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return EFAULT;
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return 0;
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}
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KResultOr<FlatPtr> Process::sys$ptsname(int fd, Userspace<char*> buffer, size_t size)
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
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REQUIRE_PROMISE(tty);
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auto description = fds().file_description(fd);
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if (!description)
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return EBADF;
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auto* master_pty = description->master_pty();
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if (!master_pty)
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return ENOTTY;
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auto pts_name = master_pty->pts_name();
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if (size < pts_name.length() + 1)
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return ERANGE;
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if (!copy_to_user(buffer, pts_name.characters(), pts_name.length() + 1))
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return EFAULT;
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return 0;
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}
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}
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