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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_BinaryPath_h
#define mozilla_BinaryPath_h
#include "nsXPCOMPrivate.h" // for MAXPATHLEN
#ifdef XP_WIN
#include <windows.h>
#elif defined(XP_UNIX)
#include <sys/stat.h>
#include <string.h>
#endif
namespace mozilla {
class BinaryPath
{
public:
#ifdef XP_WIN
static nsresult Get(const char* argv0, char aResult[MAXPATHLEN])
{
wchar_t wide_path[MAXPATHLEN];
nsresult rv = GetW(argv0, wide_path);
if (NS_FAILED(rv)) {
return rv;
}
WideCharToMultiByte(CP_UTF8, 0, wide_path, -1,
aResult, MAXPATHLEN, nullptr, nullptr);
return NS_OK;
}
private:
static nsresult GetW(const char* argv0, wchar_t aResult[MAXPATHLEN])
{
if (::GetModuleFileNameW(0, aResult, MAXPATHLEN)) {
return NS_OK;
}
return NS_ERROR_FAILURE;
}
#elif defined(XP_UNIX)
static nsresult Get(const char* aArgv0, char aResult[MAXPATHLEN])
{
struct stat fileStat;
// on unix, there is no official way to get the path of the current binary.
// instead of using the MOZILLA_FIVE_HOME hack, which doesn't scale to
// multiple applications, we will try a series of techniques:
//
// 1) use realpath() on argv[0], which works unless we're loaded from the
// PATH. Only do so if argv[0] looks like a path (contains a /).
// 2) manually walk through the PATH and look for ourself
// 3) give up
if (strchr(aArgv0, '/') && realpath(aArgv0, aResult) &&
stat(aResult, &fileStat) == 0) {
return NS_OK;
}
const char* path = getenv("PATH");
if (!path) {
return NS_ERROR_FAILURE;
}
char* pathdup = strdup(path);
if (!pathdup) {
return NS_ERROR_OUT_OF_MEMORY;
}
bool found = false;
char* token = strtok(pathdup, ":");
while (token) {
char tmpPath[MAXPATHLEN];
sprintf(tmpPath, "%s/%s", token, aArgv0);
if (realpath(tmpPath, aResult) && stat(aResult, &fileStat) == 0) {
found = true;
break;
}
token = strtok(nullptr, ":");
}
free(pathdup);
if (found) {
return NS_OK;
}
return NS_ERROR_FAILURE;
}
#else
#error Oops, you need platform-specific code here
#endif
public:
static nsresult GetFile(const char* aArgv0, nsIFile** aResult)
{
nsCOMPtr<nsIFile> lf;
#ifdef XP_WIN
wchar_t exePath[MAXPATHLEN];
nsresult rv = GetW(aArgv0, exePath);
#else
char exePath[MAXPATHLEN];
nsresult rv = Get(aArgv0, exePath);
#endif
if (NS_FAILED(rv)) {
return rv;
}
#ifdef XP_WIN
rv = NS_NewLocalFile(nsDependentString(exePath), true,
getter_AddRefs(lf));
#else
rv = NS_NewNativeLocalFile(nsDependentCString(exePath), true,
getter_AddRefs(lf));
#endif
if (NS_FAILED(rv)) {
return rv;
}
NS_ADDREF(*aResult = lf);
return NS_OK;
}
};
} // namespace mozilla
#endif /* mozilla_BinaryPath_h */
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