ProcessExecutablePathEfl.cpp   [plain text]

/*
 * Copyright (C) 2012 Samsung Electronics
 *
 * 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. AND ITS CONTRIBUTORS ``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 ITS 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 "ProcessExecutablePath.h"

#include "FileSystem.h"
#include <libgen.h>
#include <unistd.h>
#include <wtf/NeverDestroyed.h>
#include <wtf/StdLibExtras.h>
#include <wtf/text/CString.h>

namespace WebKit {

// We initially look for the process in WEBKIT_EXEC_PATH, then proceed to try the working
// directory of the running process, and finally we try LIBEXECDIR (usually /usr/local/bin).
static String findProcessPath(const char* processName)
{
    String executablePath;
    static const char* execDirectory = getenv("WEBKIT_EXEC_PATH");
    if (execDirectory) {
        executablePath = WebCore::pathByAppendingComponent(String::fromUTF8(execDirectory), processName);
        if (WebCore::fileExists(executablePath))
            return executablePath;
    }

#if OS(UNIX)
    char readLinkBuffer[PATH_MAX] = {0};

#if OS(LINUX)
    ssize_t result = readlink("/proc/self/exe", readLinkBuffer, PATH_MAX);
#else
    ssize_t result = readlink("/proc/curproc/file", readLinkBuffer, PATH_MAX);
#endif
    if (result > 0) {
        char* executablePathPtr = dirname(readLinkBuffer);
        executablePath = WebCore::pathByAppendingComponent(String::fromUTF8(executablePathPtr), processName);
        if (WebCore::fileExists(executablePath))
            return executablePath;
    }
#endif
    executablePath = WebCore::pathByAppendingComponent(String(LIBEXECDIR), processName);
    ASSERT(WebCore::fileExists(executablePath));
    return executablePath;
}

String executablePathOfWebProcess()
{
    static NeverDestroyed<const String> webKitWebProcessName(findProcessPath(WEBPROCESSNAME));

    return webKitWebProcessName;
}

String executablePathOfPluginProcess()
{
    static NeverDestroyed<const String> webKitPluginProcessName(findProcessPath(PLUGINPROCESSNAME));

    return webKitPluginProcessName;
}

#if ENABLE(NETWORK_PROCESS)
String executablePathOfNetworkProcess()
{
    static NeverDestroyed<const String> webKitNetworkProcessName(findProcessPath(NETWORKPROCESSNAME));

    return webKitNetworkProcessName;
}
#endif

} // namespace WebKit