AuroraRuntime/Source/Processes/AuOpen.Unix.cpp

/***
    Copyright (C) 2021 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: AuOpen.Unix.cpp
    Date: 2021-6-12
    Author: Reece
***/
#include <RuntimeInternal.hpp>
#include "AuProcesses.hpp"
#include "AuOpen.Unix.hpp"

#include <unistd.h>
#include <Source/IO/FS/FS.hpp>

namespace Aurora::Processes
{
    static void UnixOpenAsyncThread(AuString uri, bool bType)
    {
        bool bDirExists {};
        bool bFileExists {};

        bFileExists = AuIOFS::FileExists(uri);

        if (!bType)
        {
            bDirExists = AuIOFS::DirExists(uri);

            if (!bFileExists &&
                !bDirExists)
            {
                SysPushErrorGeneric("Exploit attempt? Attempted to open non-existent file/directory. (request: {})", uri);
                return;
            }

            if (bFileExists)
            {
                if (AuFS::IsFileBlocked(uri))
                {
                    SysPushErrorGeneric("Exploit attempt? Attempted to open untrusted file/directory. (request: {})", uri);
                    return;
                }
            }
        }
        else
        {
            if (bFileExists)
            {
                SysPushErrorGeneric("Exploit attempt? Attempted to open existing file/directory via URI ({})", uri);
                return;
            }
        }

        if constexpr (AuBuild::kIsXnuDerived)
        {
            // TODO: MacOS/iOS support
        }
        else
        {
            if (fork() == 0)
            {
                setsid();

                PosixDoForkHooks();
                PosixShutup();
                PosixFDYeetus();

                auto optStringA = AuProcess::EnvironmentGetOne("container");
                auto optStringB = AuProcess::EnvironmentGetOne("AURORA_RUNTIME_USE_GDBUS_BIN_TO_PORTAL");
                bool bIsFireJail = optStringA && optStringA.Value() == "firejail";
                bool bIsForcedDBUS = optStringB && optStringB.Value() == "YES";
                if (bIsFireJail || bIsForcedDBUS)
                {
                    execlp("gdbus",
                           "gdbus",
                           "call",
                           "--session",
                           "--dest", "org.freedesktop.portal.Desktop",
                           "--object-path", "/org/freedesktop/portal/desktop",
                           "--method", bFileExists ? "org.freedesktop.portal.OpenURI.OpenFile" : "org.freedesktop.portal.OpenURI.OpenURI",
                           "",
                           uri.c_str(),
                           "{}",
                           (char *)nullptr);
                }
                else
                {
                    if (AuFS::FileExists("/usr/bin/xdg-open"))
                    {
                        execl("/usr/bin/xdg-open", "xdg-open", uri.c_str(), (char *)nullptr);
                    }
                    else if (AuFS::FileExists("/usr/local/bin/xdg-open"))
                    {
                        execl("/usr/local/bin/xdg-open", "xdg-open", uri.c_str(), (char *)nullptr);
                    }
                    else
                    {
                        execlp("xdg-open", "xdg-open", uri.c_str(), (char *)nullptr);
                    }
                }

                exit(0);
            }
        }
    }

    static void UnixOpenAsync(const AuString &uri, bool bType)
    {
        if (uri.empty())
        {
            return;
        }

        AuThreads::Spawn(std::bind(&UnixOpenAsyncThread, AuString(uri), bType), true);
    }

    AUKN_SYM void OpenUri(const AuString &uri)
    {
        UnixOpenAsync(uri, true);
    }

    AUKN_SYM void OpenFile(const AuString &file)
    {
        UnixOpenAsync(file, false);
    }
}