зеркало из https://github.com/mozilla/gecko-dev.git
309 строки
7.2 KiB
C++
309 строки
7.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_BinaryPath_h
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#define mozilla_BinaryPath_h
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#include "nsXPCOMPrivate.h" // for MAXPATHLEN
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#ifdef XP_WIN
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#include <windows.h>
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#elif defined(XP_MACOSX)
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#include <CoreFoundation/CoreFoundation.h>
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#elif defined(XP_UNIX)
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#endif
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#if defined(__FreeBSD__) || defined(__DragonFly__) || \
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defined(__FreeBSD_kernel__) || defined(__NetBSD__) || \
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defined(__OpenBSD__)
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#include <sys/sysctl.h>
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#endif
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#if defined(__OpenBSD__)
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#include <sys/stat.h>
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#endif
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#include "mozilla/UniquePtr.h"
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#include "mozilla/UniquePtrExtensions.h"
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#ifdef MOZILLA_INTERNAL_API
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#include "nsCOMPtr.h"
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#include "nsIFile.h"
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#include "nsString.h"
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#endif
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namespace mozilla {
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class BinaryPath
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{
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public:
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#ifdef XP_WIN
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static nsresult Get(char aResult[MAXPATHLEN])
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{
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wchar_t wide_path[MAXPATHLEN];
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nsresult rv = GetW(wide_path);
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if (NS_FAILED(rv)) {
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return rv;
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}
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WideCharToMultiByte(CP_UTF8, 0, wide_path, -1,
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aResult, MAXPATHLEN, nullptr, nullptr);
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return NS_OK;
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}
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static nsresult GetLong(wchar_t aResult[MAXPATHLEN])
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{
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static bool cached = false;
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static wchar_t exeLongPath[MAXPATHLEN] = L"";
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if (!cached) {
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nsresult rv = GetW(exeLongPath);
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if (NS_FAILED(rv)) {
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return rv;
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}
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if (!::GetLongPathNameW(exeLongPath, exeLongPath, MAXPATHLEN)) {
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return NS_ERROR_FAILURE;
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}
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cached = true;
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}
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if (wcscpy_s(aResult, MAXPATHLEN, exeLongPath)) {
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return NS_ERROR_FAILURE;
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}
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return NS_OK;
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}
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private:
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static nsresult GetW(wchar_t aResult[MAXPATHLEN])
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{
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static bool cached = false;
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static wchar_t moduleFileName[MAXPATHLEN] = L"";
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if (!cached) {
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if (!::GetModuleFileNameW(0, moduleFileName, MAXPATHLEN)) {
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return NS_ERROR_FAILURE;
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}
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cached = true;
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}
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if (wcscpy_s(aResult, MAXPATHLEN, moduleFileName)) {
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return NS_ERROR_FAILURE;
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}
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return NS_OK;
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}
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#elif defined(XP_MACOSX)
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static nsresult Get(char aResult[MAXPATHLEN])
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{
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// Works even if we're not bundled.
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CFBundleRef appBundle = CFBundleGetMainBundle();
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if (!appBundle) {
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return NS_ERROR_FAILURE;
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}
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CFURLRef executableURL = CFBundleCopyExecutableURL(appBundle);
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if (!executableURL) {
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return NS_ERROR_FAILURE;
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}
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nsresult rv;
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if (CFURLGetFileSystemRepresentation(executableURL, false, (UInt8*)aResult,
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MAXPATHLEN)) {
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// Sanitize path in case the app was launched from Terminal via
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// './firefox' for example.
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size_t readPos = 0;
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size_t writePos = 0;
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while (aResult[readPos] != '\0') {
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if (aResult[readPos] == '.' && aResult[readPos + 1] == '/') {
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readPos += 2;
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} else {
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aResult[writePos] = aResult[readPos];
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readPos++;
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writePos++;
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}
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}
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aResult[writePos] = '\0';
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rv = NS_OK;
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} else {
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rv = NS_ERROR_FAILURE;
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}
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CFRelease(executableURL);
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return rv;
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}
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#elif defined(ANDROID)
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static nsresult Get(char aResult[MAXPATHLEN])
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{
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// On Android, we use the GRE_HOME variable that is set by the Java
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// bootstrap code.
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const char* greHome = getenv("GRE_HOME");
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if (!greHome) {
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return NS_ERROR_FAILURE;
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}
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snprintf(aResult, MAXPATHLEN, "%s/%s", greHome, "dummy");
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aResult[MAXPATHLEN - 1] = '\0';
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return NS_OK;
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}
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#elif defined(XP_LINUX) || defined(XP_SOLARIS)
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static nsresult Get(char aResult[MAXPATHLEN])
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{
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# if defined(XP_SOLARIS)
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const char path[] = "/proc/self/path/a.out";
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# else
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const char path[] = "/proc/self/exe";
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# endif
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ssize_t len = readlink(path, aResult, MAXPATHLEN - 1);
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if (len < 0) {
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return NS_ERROR_FAILURE;
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}
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aResult[len] = '\0';
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return NS_OK;
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}
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#elif defined(__FreeBSD__) || defined(__DragonFly__) || \
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defined(__FreeBSD_kernel__) || defined(__NetBSD__)
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static nsresult Get(char aResult[MAXPATHLEN])
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{
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int mib[4];
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mib[0] = CTL_KERN;
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#ifdef __NetBSD__
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mib[1] = KERN_PROC_ARGS;
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mib[2] = -1;
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mib[3] = KERN_PROC_PATHNAME;
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#else
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mib[1] = KERN_PROC;
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mib[2] = KERN_PROC_PATHNAME;
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mib[3] = -1;
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#endif
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size_t len = MAXPATHLEN;
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if (sysctl(mib, 4, aResult, &len, nullptr, 0) < 0) {
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return NS_ERROR_FAILURE;
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}
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return NS_OK;
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}
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#elif defined(__OpenBSD__)
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static nsresult Get(char aResult[MAXPATHLEN])
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{
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int mib[4];
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mib[0] = CTL_KERN;
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mib[1] = KERN_PROC_ARGS;
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mib[2] = getpid();
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mib[3] = KERN_PROC_ARGV;
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size_t len = 0;
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if (sysctl(mib, 4, nullptr, &len, nullptr, 0) < 0) {
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return NS_ERROR_FAILURE;
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}
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auto argv = MakeUnique<const char*[]>(len / sizeof(const char*));
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if (sysctl(mib, 4, argv.get(), &len, nullptr, 0) < 0) {
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return NS_ERROR_FAILURE;
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}
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return GetFromArgv0(argv[0], aResult);
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}
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static nsresult GetFromArgv0(const char* aArgv0, char aResult[MAXPATHLEN])
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{
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struct stat fileStat;
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// 1) use realpath() on argv[0], which works unless we're loaded from the
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// PATH. Only do so if argv[0] looks like a path (contains a /).
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// 2) manually walk through the PATH and look for ourself
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// 3) give up
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if (strchr(aArgv0, '/') && realpath(aArgv0, aResult) &&
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stat(aResult, &fileStat) == 0) {
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return NS_OK;
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}
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const char* path = getenv("PATH");
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if (!path) {
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return NS_ERROR_FAILURE;
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}
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char* pathdup = strdup(path);
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if (!pathdup) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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bool found = false;
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char* token = strtok(pathdup, ":");
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while (token) {
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char tmpPath[MAXPATHLEN];
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sprintf(tmpPath, "%s/%s", token, aArgv0);
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if (realpath(tmpPath, aResult) && stat(aResult, &fileStat) == 0) {
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found = true;
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break;
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}
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token = strtok(nullptr, ":");
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}
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free(pathdup);
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if (found) {
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return NS_OK;
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}
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return NS_ERROR_FAILURE;
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}
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#else
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#error Oops, you need platform-specific code here
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#endif
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public:
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static UniqueFreePtr<char> Get()
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{
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char path[MAXPATHLEN];
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if (NS_FAILED(Get(path))) {
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return nullptr;
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}
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UniqueFreePtr<char> result;
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result.reset(strdup(path));
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return result;
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}
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#ifdef MOZILLA_INTERNAL_API
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static nsresult GetFile(nsIFile** aResult)
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{
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nsCOMPtr<nsIFile> lf;
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#ifdef XP_WIN
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wchar_t exePath[MAXPATHLEN];
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nsresult rv = GetW(exePath);
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#else
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char exePath[MAXPATHLEN];
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nsresult rv = Get(exePath);
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#endif
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if (NS_FAILED(rv)) {
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return rv;
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}
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#ifdef XP_WIN
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rv = NS_NewLocalFile(nsDependentString(exePath), true,
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getter_AddRefs(lf));
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#else
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rv = NS_NewNativeLocalFile(nsDependentCString(exePath), true,
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getter_AddRefs(lf));
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#endif
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if (NS_FAILED(rv)) {
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return rv;
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}
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NS_ADDREF(*aResult = lf);
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return NS_OK;
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}
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#endif
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};
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} // namespace mozilla
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#endif /* mozilla_BinaryPath_h */
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