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https://github.com/RGBCube/serenity
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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.
40 lines
932 B
C++
40 lines
932 B
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/Process.h>
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namespace Kernel {
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KResultOr<FlatPtr> Process::sys$uname(Userspace<utsname*> user_buf)
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
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extern String* g_hostname;
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extern Mutex* g_hostname_lock;
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REQUIRE_PROMISE(stdio);
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MutexLocker locker(*g_hostname_lock, Mutex::Mode::Shared);
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if (g_hostname->length() + 1 > sizeof(utsname::nodename))
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return ENAMETOOLONG;
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utsname buf {};
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memcpy(buf.sysname, "SerenityOS", 11);
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memcpy(buf.release, "1.0-dev", 8);
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memcpy(buf.version, "FIXME", 6);
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#if ARCH(I386)
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memcpy(buf.machine, "i686", 5);
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#else
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memcpy(buf.machine, "x86_64", 7);
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#endif
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memcpy(buf.nodename, g_hostname->characters(), g_hostname->length() + 1);
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if (!copy_to_user(user_buf, &buf))
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return EFAULT;
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return 0;
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}
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}
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