487 lines
17 KiB
C++
487 lines
17 KiB
C++
#ifdef __linux__
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// clang-format off
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#include <cstring> // std::strlen
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#include <dbus/dbus-shared.h> // DBUS_BUS_SESSION
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#include <dbus/dbus-protocol.h> // DBUS_TYPE_*
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#include <expected> // std::{unexpected, expected}
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#include <format> // std::{format, format_to_n}
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#include <fstream> // std::ifstream
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#include <climits> // PATH_MAX
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#include <limits> // std::numeric_limits
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#include <string> // std::{getline, string (String)}
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#include <string_view> // std::string_view (StringView)
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#include <sys/socket.h> // ucred, getsockopt, SOL_SOCKET, SO_PEERCRED
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#include <sys/statvfs.h> // statvfs
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#include <sys/sysinfo.h> // sysinfo
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#include <sys/utsname.h> // utsname, uname
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#include <unistd.h> // readlink
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#include <utility> // std::move
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#include "src/util/defs.hpp"
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#include "src/util/error.hpp"
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#include "src/util/helpers.hpp"
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#include "src/util/logging.hpp"
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#include "src/util/types.hpp"
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#include "src/wrappers/dbus.hpp"
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#include "src/wrappers/wayland.hpp"
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#include "src/wrappers/xcb.hpp"
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#include "linux/pkg_count.hpp"
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#include "os.hpp"
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// clang-format on
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using namespace util::types;
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using util::error::DracError, util::error::DracErrorCode;
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using util::helpers::GetEnv;
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namespace {
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fn GetX11WindowManager() -> Result<String, DracError> {
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using namespace xcb;
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const DisplayGuard conn;
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if (!conn)
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if (const i32 err = connection_has_error(conn.get()))
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return Err(DracError(DracErrorCode::ApiUnavailable, [&] -> String {
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if (const Option<ConnError> connErr = getConnError(err)) {
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switch (*connErr) {
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case Generic: return "Stream/Socket/Pipe Error";
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case ExtNotSupported: return "Extension Not Supported";
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case MemInsufficient: return "Insufficient Memory";
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case ReqLenExceed: return "Request Length Exceeded";
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case ParseErr: return "Display String Parse Error";
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case InvalidScreen: return "Invalid Screen";
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case FdPassingFailed: return "FD Passing Failed";
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default: return std::format("Unknown Error Code ({})", err);
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}
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}
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return std::format("Unknown Error Code ({})", err);
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}()));
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fn internAtom = [&conn](const StringView name) -> Result<atom_t, DracError> {
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const ReplyGuard<intern_atom_reply_t> reply(
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intern_atom_reply(conn.get(), intern_atom(conn.get(), 0, static_cast<u16>(name.size()), name.data()), nullptr)
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);
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if (!reply)
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return Err(
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DracError(DracErrorCode::PlatformSpecific, std::format("Failed to get X11 atom reply for '{}'", name))
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);
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return reply->atom;
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};
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const Result<atom_t, DracError> supportingWmCheckAtom = internAtom("_NET_SUPPORTING_WM_CHECK");
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const Result<atom_t, DracError> wmNameAtom = internAtom("_NET_WM_NAME");
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const Result<atom_t, DracError> utf8StringAtom = internAtom("UTF8_STRING");
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if (!supportingWmCheckAtom || !wmNameAtom || !utf8StringAtom) {
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if (!supportingWmCheckAtom)
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error_log("Failed to get _NET_SUPPORTING_WM_CHECK atom");
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if (!wmNameAtom)
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error_log("Failed to get _NET_WM_NAME atom");
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if (!utf8StringAtom)
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error_log("Failed to get UTF8_STRING atom");
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return Err(DracError(DracErrorCode::PlatformSpecific, "Failed to get X11 atoms"));
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}
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const ReplyGuard<get_property_reply_t> wmWindowReply(get_property_reply(
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conn.get(),
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get_property(conn.get(), 0, conn.rootScreen()->root, *supportingWmCheckAtom, ATOM_WINDOW, 0, 1),
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nullptr
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));
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if (!wmWindowReply || wmWindowReply->type != ATOM_WINDOW || wmWindowReply->format != 32 ||
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get_property_value_length(wmWindowReply.get()) == 0)
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return Err(DracError(DracErrorCode::NotFound, "Failed to get _NET_SUPPORTING_WM_CHECK property"));
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const window_t wmRootWindow = *static_cast<window_t*>(get_property_value(wmWindowReply.get()));
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const ReplyGuard<get_property_reply_t> wmNameReply(get_property_reply(
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conn.get(), get_property(conn.get(), 0, wmRootWindow, *wmNameAtom, *utf8StringAtom, 0, 1024), nullptr
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));
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if (!wmNameReply || wmNameReply->type != *utf8StringAtom || get_property_value_length(wmNameReply.get()) == 0)
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return Err(DracError(DracErrorCode::NotFound, "Failed to get _NET_WM_NAME property"));
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const char* nameData = static_cast<const char*>(get_property_value(wmNameReply.get()));
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const usize length = get_property_value_length(wmNameReply.get());
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return String(nameData, length);
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}
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fn GetWaylandCompositor() -> Result<String, DracError> {
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const wl::DisplayGuard display;
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if (!display)
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return Err(DracError(DracErrorCode::NotFound, "Failed to connect to display (is Wayland running?)"));
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const i32 fileDescriptor = display.fd();
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if (fileDescriptor < 0)
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return Err(DracError(DracErrorCode::ApiUnavailable, "Failed to get Wayland file descriptor"));
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ucred cred;
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socklen_t len = sizeof(cred);
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if (getsockopt(fileDescriptor, SOL_SOCKET, SO_PEERCRED, &cred, &len) == -1)
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return Err(DracError::withErrno("Failed to get socket credentials (SO_PEERCRED)"));
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Array<char, 128> exeLinkPathBuf;
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auto [out, size] = std::format_to_n(exeLinkPathBuf.data(), exeLinkPathBuf.size() - 1, "/proc/{}/exe", cred.pid);
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if (out >= exeLinkPathBuf.data() + exeLinkPathBuf.size() - 1)
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return Err(DracError(DracErrorCode::InternalError, "Failed to format /proc path (PID too large?)"));
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*out = '\0';
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const char* exeLinkPath = exeLinkPathBuf.data();
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Array<char, PATH_MAX> exeRealPathBuf; // NOLINT(misc-include-cleaner) - PATH_MAX is in <climits>
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const isize bytesRead = readlink(exeLinkPath, exeRealPathBuf.data(), exeRealPathBuf.size() - 1);
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if (bytesRead == -1)
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return Err(DracError::withErrno(std::format("Failed to read link '{}'", exeLinkPath)));
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exeRealPathBuf.at(bytesRead) = '\0';
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StringView compositorNameView;
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const StringView pathView(exeRealPathBuf.data(), bytesRead);
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StringView filenameView;
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if (const usize lastCharPos = pathView.find_last_not_of('/'); lastCharPos != StringView::npos) {
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const StringView relevantPart = pathView.substr(0, lastCharPos + 1);
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if (const usize separatorPos = relevantPart.find_last_of('/'); separatorPos == StringView::npos)
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filenameView = relevantPart;
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else
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filenameView = relevantPart.substr(separatorPos + 1);
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}
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if (!filenameView.empty())
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compositorNameView = filenameView;
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if (compositorNameView.empty() || compositorNameView == "." || compositorNameView == "/")
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return Err(DracError(DracErrorCode::NotFound, "Failed to get compositor name from path"));
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if (constexpr StringView wrappedSuffix = "-wrapped"; compositorNameView.length() > 1 + wrappedSuffix.length() &&
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compositorNameView[0] == '.' && compositorNameView.ends_with(wrappedSuffix)) {
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const StringView cleanedView =
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compositorNameView.substr(1, compositorNameView.length() - 1 - wrappedSuffix.length());
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if (cleanedView.empty())
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return Err(DracError(DracErrorCode::NotFound, "Compositor name invalid after heuristic"));
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return String(cleanedView);
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}
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return String(compositorNameView);
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}
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} // namespace
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namespace os {
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fn GetOSVersion() -> Result<String, DracError> {
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constexpr CStr path = "/etc/os-release";
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std::ifstream file(path);
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if (!file)
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return Err(DracError(DracErrorCode::NotFound, std::format("Failed to open {}", path)));
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String line;
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constexpr StringView prefix = "PRETTY_NAME=";
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while (std::getline(file, line)) {
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if (StringView(line).starts_with(prefix)) {
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String value = line.substr(prefix.size());
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if ((value.length() >= 2 && value.front() == '"' && value.back() == '"') ||
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(value.length() >= 2 && value.front() == '\'' && value.back() == '\''))
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value = value.substr(1, value.length() - 2);
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if (value.empty())
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return Err(
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DracError(DracErrorCode::ParseError, std::format("PRETTY_NAME value is empty or only quotes in {}", path))
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);
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return value;
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}
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}
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return Err(DracError(DracErrorCode::NotFound, std::format("PRETTY_NAME line not found in {}", path)));
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}
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fn GetMemInfo() -> Result<u64, DracError> {
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struct sysinfo info;
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if (sysinfo(&info) != 0)
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return Err(DracError::withErrno("sysinfo call failed"));
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const u64 totalRam = info.totalram;
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const u64 memUnit = info.mem_unit;
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if (memUnit == 0)
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return Err(DracError(DracErrorCode::InternalError, "sysinfo returned mem_unit of zero"));
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if (totalRam > std::numeric_limits<u64>::max() / memUnit)
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return Err(DracError(DracErrorCode::InternalError, "Potential overflow calculating total RAM"));
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return info.totalram * info.mem_unit;
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}
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fn GetNowPlaying() -> Result<MediaInfo, DracError> {
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using namespace dbus;
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Result<Connection, DracError> connectionResult = Connection::busGet(DBUS_BUS_SESSION);
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if (!connectionResult)
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return Err(connectionResult.error());
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const Connection& connection = *connectionResult;
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Option<String> activePlayer = None;
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{
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Result<Message, DracError> listNamesResult =
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Message::newMethodCall("org.freedesktop.DBus", "/org/freedesktop/DBus", "org.freedesktop.DBus", "ListNames");
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if (!listNamesResult)
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return Err(listNamesResult.error());
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Result<Message, DracError> listNamesReplyResult = connection.sendWithReplyAndBlock(*listNamesResult, 100);
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if (!listNamesReplyResult)
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return Err(listNamesReplyResult.error());
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MessageIter iter = listNamesReplyResult->iterInit();
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if (!iter.isValid() || iter.getArgType() != DBUS_TYPE_ARRAY)
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return Err(DracError(DracErrorCode::ParseError, "Invalid DBus ListNames reply format: Expected array"));
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MessageIter subIter = iter.recurse();
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if (!subIter.isValid())
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return Err(
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DracError(DracErrorCode::ParseError, "Invalid DBus ListNames reply format: Could not recurse into array")
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);
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while (subIter.getArgType() != DBUS_TYPE_INVALID) {
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if (Option<String> name = subIter.getString())
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if (name->starts_with("org.mpris.MediaPlayer2.")) {
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activePlayer = std::move(*name);
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break;
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}
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if (!subIter.next())
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break;
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}
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}
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if (!activePlayer)
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return Err(DracError(DracErrorCode::NotFound, "No active MPRIS players found"));
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Result<Message, DracError> msgResult = Message::newMethodCall(
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activePlayer->c_str(), "/org/mpris/MediaPlayer2", "org.freedesktop.DBus.Properties", "Get"
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);
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if (!msgResult)
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return Err(msgResult.error());
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Message& msg = *msgResult;
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if (!msg.appendArgs("org.mpris.MediaPlayer2.Player", "Metadata"))
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return Err(DracError(DracErrorCode::InternalError, "Failed to append arguments to Properties.Get message"));
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Result<Message, DracError> replyResult = connection.sendWithReplyAndBlock(msg, 100);
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if (!replyResult)
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return Err(replyResult.error());
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Option<String> title = None;
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Option<String> artist = None;
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MessageIter propIter = replyResult->iterInit();
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if (!propIter.isValid())
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return Err(DracError(DracErrorCode::ParseError, "Properties.Get reply has no arguments or invalid iterator"));
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if (propIter.getArgType() != DBUS_TYPE_VARIANT)
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return Err(DracError(DracErrorCode::ParseError, "Properties.Get reply argument is not a variant"));
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MessageIter variantIter = propIter.recurse();
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if (!variantIter.isValid())
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return Err(DracError(DracErrorCode::ParseError, "Could not recurse into variant"));
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if (variantIter.getArgType() != DBUS_TYPE_ARRAY || variantIter.getElementType() != DBUS_TYPE_DICT_ENTRY)
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return Err(DracError(DracErrorCode::ParseError, "Metadata variant content is not a dictionary array (a{sv})"));
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MessageIter dictIter = variantIter.recurse();
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if (!dictIter.isValid())
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return Err(DracError(DracErrorCode::ParseError, "Could not recurse into metadata dictionary array"));
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while (dictIter.getArgType() == DBUS_TYPE_DICT_ENTRY) {
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MessageIter entryIter = dictIter.recurse();
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if (!entryIter.isValid()) {
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debug_log("Warning: Could not recurse into dict entry, skipping.");
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if (!dictIter.next())
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break;
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continue;
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}
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Option<String> key = entryIter.getString();
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if (!key) {
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debug_log("Warning: Could not get key string from dict entry, skipping.");
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if (!dictIter.next())
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break;
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continue;
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}
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if (!entryIter.next() || entryIter.getArgType() != DBUS_TYPE_VARIANT) {
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if (!dictIter.next())
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break;
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continue;
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}
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MessageIter valueVariantIter = entryIter.recurse();
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if (!valueVariantIter.isValid()) {
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if (!dictIter.next())
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break;
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continue;
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}
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if (*key == "xesam:title") {
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title = valueVariantIter.getString();
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} else if (*key == "xesam:artist") {
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if (valueVariantIter.getArgType() == DBUS_TYPE_ARRAY && valueVariantIter.getElementType() == DBUS_TYPE_STRING) {
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if (MessageIter artistArrayIter = valueVariantIter.recurse(); artistArrayIter.isValid())
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artist = artistArrayIter.getString();
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} else {
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debug_log("Warning: Artist value was not an array of strings as expected.");
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}
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}
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if (!dictIter.next())
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break;
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}
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return MediaInfo(std::move(title), std::move(artist));
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}
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fn GetWindowManager() -> Result<String, DracError> {
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if (Result<String, DracError> waylandResult = GetWaylandCompositor())
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return *waylandResult;
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if (Result<String, DracError> x11Result = GetX11WindowManager())
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return *x11Result;
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return Err(DracError(DracErrorCode::NotFound, "Could not detect window manager (Wayland/X11) or both failed"));
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}
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fn GetDesktopEnvironment() -> Result<String, DracError> {
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return GetEnv("XDG_CURRENT_DESKTOP")
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.transform([](String xdgDesktop) -> String {
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if (const usize colon = xdgDesktop.find(':'); colon != String::npos)
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xdgDesktop.resize(colon);
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return xdgDesktop;
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})
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.or_else([](const DracError&) -> Result<String, DracError> { return GetEnv("DESKTOP_SESSION"); });
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}
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fn GetShell() -> Result<String, DracError> {
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if (const Result<String, DracError> shellPath = GetEnv("SHELL")) {
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// clang-format off
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constexpr Array<Pair<StringView, StringView>, 5> shellMap {{
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{ "bash", "Bash" },
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{ "zsh", "Zsh" },
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{ "fish", "Fish" },
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{ "nu", "Nushell" },
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{ "sh", "SH" }, // sh last because other shells contain "sh"
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}};
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// clang-format on
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for (const auto& [exe, name] : shellMap)
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if (shellPath->contains(exe))
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return String(name);
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return *shellPath; // fallback to the raw shell path
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}
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return Err(DracError(DracErrorCode::NotFound, "Could not find SHELL environment variable"));
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}
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fn GetHost() -> Result<String, DracError> {
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constexpr CStr primaryPath = "/sys/class/dmi/id/product_family";
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constexpr CStr fallbackPath = "/sys/class/dmi/id/product_name";
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fn readFirstLine = [&](const String& path) -> Result<String, DracError> {
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std::ifstream file(path);
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String line;
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if (!file)
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return Err(
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DracError(DracErrorCode::NotFound, std::format("Failed to open DMI product identifier file '{}'", path))
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);
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if (!std::getline(file, line) || line.empty())
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return Err(
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DracError(DracErrorCode::ParseError, std::format("DMI product identifier file ('{}') is empty", path))
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);
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return line;
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};
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return readFirstLine(primaryPath).or_else([&](const DracError& primaryError) -> Result<String, DracError> {
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return readFirstLine(fallbackPath).or_else([&](const DracError& fallbackError) -> Result<String, DracError> {
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return Err(DracError(
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DracErrorCode::InternalError,
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std::format(
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"Failed to get host identifier. Primary ('{}'): {}. Fallback ('{}'): {}",
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primaryPath,
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primaryError.message,
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fallbackPath,
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fallbackError.message
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)
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));
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});
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});
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}
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fn GetKernelVersion() -> Result<String, DracError> {
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utsname uts;
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if (uname(&uts) == -1)
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return Err(DracError::withErrno("uname call failed"));
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if (std::strlen(uts.release) == 0)
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return Err(DracError(DracErrorCode::ParseError, "uname returned null kernel release"));
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return uts.release;
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}
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fn GetDiskUsage() -> Result<DiskSpace, DracError> {
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struct statvfs stat;
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if (statvfs("/", &stat) == -1)
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return Err(DracError::withErrno(std::format("Failed to get filesystem stats for '/' (statvfs call failed)")));
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return DiskSpace {
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.used_bytes = (stat.f_blocks * stat.f_frsize) - (stat.f_bfree * stat.f_frsize),
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.total_bytes = stat.f_blocks * stat.f_frsize,
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};
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}
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fn GetPackageCount() -> Result<u64, DracError> {
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u64 count = 0;
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if (Result<u64, DracError> linuxCount = linux::GetTotalPackageCount())
|
|
count += *linuxCount;
|
|
else
|
|
debug_at(linuxCount.error());
|
|
|
|
return count;
|
|
}
|
|
} // namespace os
|
|
|
|
#endif // __linux__
|