1/* 2 * Copyright (C) 2012 Samsung Electronics 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "ProcessExecutablePath.h" 28 29#include "FileSystem.h" 30#include <libgen.h> 31#include <unistd.h> 32#include <wtf/NeverDestroyed.h> 33#include <wtf/StdLibExtras.h> 34#include <wtf/text/CString.h> 35 36namespace WebKit { 37 38// We initially look for the process in WEBKIT_EXEC_PATH, then proceed to try the working 39// directory of the running process, and finally we try LIBEXECDIR (usually /usr/local/bin). 40static String findProcessPath(const char* processName) 41{ 42 String executablePath; 43 static const char* execDirectory = getenv("WEBKIT_EXEC_PATH"); 44 if (execDirectory) { 45 executablePath = WebCore::pathByAppendingComponent(String::fromUTF8(execDirectory), processName); 46 if (WebCore::fileExists(executablePath)) 47 return executablePath; 48 } 49 50#if OS(UNIX) 51 char readLinkBuffer[PATH_MAX] = {0}; 52 53#if OS(LINUX) 54 ssize_t result = readlink("/proc/self/exe", readLinkBuffer, PATH_MAX); 55#else 56 ssize_t result = readlink("/proc/curproc/file", readLinkBuffer, PATH_MAX); 57#endif 58 if (result > 0) { 59 char* executablePathPtr = dirname(readLinkBuffer); 60 executablePath = WebCore::pathByAppendingComponent(String::fromUTF8(executablePathPtr), processName); 61 if (WebCore::fileExists(executablePath)) 62 return executablePath; 63 } 64#endif 65 executablePath = WebCore::pathByAppendingComponent(String(LIBEXECDIR), processName); 66 ASSERT(WebCore::fileExists(executablePath)); 67 return executablePath; 68} 69 70String executablePathOfWebProcess() 71{ 72 static NeverDestroyed<const String> webKitWebProcessName(findProcessPath(WEBPROCESSNAME)); 73 74 return webKitWebProcessName; 75} 76 77String executablePathOfPluginProcess() 78{ 79 static NeverDestroyed<const String> webKitPluginProcessName(findProcessPath(PLUGINPROCESSNAME)); 80 81 return webKitPluginProcessName; 82} 83 84#if ENABLE(NETWORK_PROCESS) 85String executablePathOfNetworkProcess() 86{ 87 static NeverDestroyed<const String> webKitNetworkProcessName(findProcessPath(NETWORKPROCESSNAME)); 88 89 return webKitNetworkProcessName; 90} 91#endif 92 93} // namespace WebKit 94