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/*
* Copyright (C) 2020 Jan-Michael Brummer <jan.brummer@tabos.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <wtf/glib/ChassisType.h>
#include <mutex>
#include <optional>
#include <wtf/glib/GUniquePtr.h>
namespace WTF {
static std::optional<ChassisType> readMachineInfoChassisType()
{
GUniqueOutPtr<char> buffer;
GUniqueOutPtr<GError> error;
if (!g_file_get_contents("/etc/machine-info", &buffer.outPtr(), nullptr, &error.outPtr())) {
if (!g_error_matches(error.get(), G_FILE_ERROR, G_FILE_ERROR_NOENT))
g_warning("Could not open /etc/machine-info: %s", error->message);
return std::nullopt;
}
GUniquePtr<char*> split(g_strsplit(buffer.get(), "\n", -1));
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN // GLib port.
for (int i = 0; split.get()[i]; ++i) {
if (g_str_has_prefix(split.get()[i], "CHASSIS=")) {
char* chassis = split.get()[i] + 8;
GUniquePtr<char> unquoted(g_shell_unquote(chassis, &error.outPtr()));
if (error)
g_warning("Could not unquote chassis type %s: %s", chassis, error->message);
if (!strcmp(unquoted.get(), "tablet") || !strcmp(unquoted.get(), "handset"))
return ChassisType::Mobile;
return ChassisType::Desktop;
}
}
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
return std::nullopt;
}
static std::optional<ChassisType> readDMIChassisType()
{
GUniqueOutPtr<char> buffer;
GUniqueOutPtr<GError> error;
if (g_file_get_contents("/sys/class/dmi/id/chassis_type", &buffer.outPtr(), nullptr, &error.outPtr())) {
int type = strtol(buffer.get(), nullptr, 10);
// See the SMBIOS Specification 3.0 section 7.4.1 for details about the values listed here:
// https://www.dmtf.org/sites/default/files/standards/documents/DSP0134_3.0.0.pdf
switch (type) {
case 0x3: /* Desktop */
case 0x4: /* Low Profile Desktop */
case 0x6: /* Mini Tower */
case 0x7: /* Tower */
case 0x8: /* Portable */
case 0x9: /* Laptop */
case 0xA: /* Notebook */
case 0xE: /* Sub Notebook */
case 0x11: /* Main Server Chassis */
case 0x1C: /* Blade */
case 0x1D: /* Blade Enclosure */
case 0x1F: /* Convertible */
case 0x20: /* Detachable */
return ChassisType::Desktop;
case 0xB: /* Hand Held */
case 0x1E: /* Tablet */
return ChassisType::Mobile;
}
} else if (!g_error_matches(error.get(), G_FILE_ERROR, G_FILE_ERROR_NOENT))
g_warning("Could not open /sys/class/dmi/id/chassis_type: %s", error->message);
return std::nullopt;
}
static std::optional<ChassisType> readACPIChassisType()
{
GUniqueOutPtr<char> buffer;
GUniqueOutPtr<GError> error;
if (g_file_get_contents("/sys/firmware/acpi/pm_profile", &buffer.outPtr(), nullptr, &error.outPtr())) {
int type = strtol(buffer.get(), nullptr, 10);
// See the ACPI 5.0 Spec Section 5.2.9.1 for details:
// http://www.acpi.info/DOWNLOADS/ACPIspec50.pdf
switch (type) {
case 1: /* Desktop */
case 2: /* Mobile */
case 3: /* Workstation */
case 4: /* Enterprise Server */
case 5: /* SOHO Server */
case 6: /* Appliance PC */
case 7: /* Performance Server */
return ChassisType::Desktop;
case 8: /* Tablet */
return ChassisType::Mobile;
}
} else if (!g_error_matches(error.get(), G_FILE_ERROR, G_FILE_ERROR_NOENT))
g_warning("Could not open /sys/firmware/acpi/pm_profile: %s", error->message);
return std::nullopt;
}
ChassisType chassisType()
{
static ChassisType chassisType;
static std::once_flag initializeChassis;
std::call_once(initializeChassis, [] {
auto optionalChassisType = readMachineInfoChassisType();
if (!optionalChassisType)
optionalChassisType = readDMIChassisType();
if (!optionalChassisType)
optionalChassisType = readACPIChassisType();
chassisType = optionalChassisType.value_or(ChassisType::Desktop);
});
return chassisType;
}
} // namespace WTF
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