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58b509584a
Instead of allocating a KString on each uname syscall, just allocate during boot so we never have to worry about heap allocation in that syscall.
53 lines
1.6 KiB
C++
53 lines
1.6 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2022, kleines Filmröllchen <filmroellchen@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 <AK/TypedTransfer.h>
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#include <Kernel/Tasks/Process.h>
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#include <Kernel/Version.h>
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namespace Kernel {
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#if ARCH(X86_64)
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# define UNAME_MACHINE "x86_64"
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#elif ARCH(AARCH64)
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# define UNAME_MACHINE "AArch64"
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#else
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# error Unknown architecture
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#endif
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KString* g_version_string { nullptr };
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ErrorOr<FlatPtr> Process::sys$uname(Userspace<utsname*> user_buf)
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{
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VERIFY_NO_PROCESS_BIG_LOCK(this);
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TRY(require_promise(Pledge::stdio));
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utsname buf {
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"SerenityOS",
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{}, // Hostname, filled in below.
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{}, // "Release" (1.0-dev), filled in below.
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{}, // "Revision" (git commit hash), filled in below.
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UNAME_MACHINE
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};
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VERIFY(g_version_string);
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AK::TypedTransfer<u8>::copy(reinterpret_cast<u8*>(buf.release), g_version_string->bytes().data(), min(g_version_string->length(), UTSNAME_ENTRY_LEN - 1));
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AK::TypedTransfer<u8>::copy(reinterpret_cast<u8*>(buf.version), SERENITY_VERSION.bytes().data(), min(SERENITY_VERSION.length(), UTSNAME_ENTRY_LEN - 1));
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hostname().with_shared([&](auto const& name) {
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auto name_length = name.representable_view().length();
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VERIFY(name_length <= (UTSNAME_ENTRY_LEN - 1));
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AK::TypedTransfer<char>::copy(reinterpret_cast<char*>(buf.nodename), name.representable_view().characters_without_null_termination(), name_length);
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buf.nodename[name_length] = '\0';
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});
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TRY(copy_to_user(user_buf, &buf));
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return 0;
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}
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}
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