gecko-dev/xpcom/build/BinaryPath.h

195 lines
5.7 KiB
C++

/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code
*
* The Initial Developer of the Original Code is
* Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Mike Hommey <mh@glandium.org>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef mozilla_BinaryPath_h
#define mozilla_BinaryPath_h
#include "nsXPCOMPrivate.h" // for MAXPATHLEN
#include "prtypes.h"
#ifdef XP_WIN
#include <windows.h>
#elif defined(XP_MACOSX)
#include <CoreFoundation/CoreFoundation.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])
{
PRUnichar wide_path[MAXPATHLEN];
nsresult rv = GetW(argv0, wide_path);
if (NS_FAILED(rv))
return rv;
WideCharToMultiByte(CP_UTF8, 0, wide_path, -1,
aResult, MAXPATHLEN, NULL, NULL);
return NS_OK;
}
private:
static nsresult GetW(const char *argv0, PRUnichar aResult[MAXPATHLEN])
{
if (::GetModuleFileNameW(0, aResult, MAXPATHLEN))
return NS_OK;
return NS_ERROR_FAILURE;
}
#elif defined(XP_MACOSX)
static nsresult Get(const char *argv0, char aResult[MAXPATHLEN])
{
// Works even if we're not bundled.
CFBundleRef appBundle = CFBundleGetMainBundle();
if (!appBundle)
return NS_ERROR_FAILURE;
CFURLRef executableURL = CFBundleCopyExecutableURL(appBundle);
if (!executableURL)
return NS_ERROR_FAILURE;
nsresult rv;
if (CFURLGetFileSystemRepresentation(executableURL, false, (UInt8 *)aResult, MAXPATHLEN))
rv = NS_OK;
else
rv = NS_ERROR_FAILURE;
CFRelease(executableURL);
return rv;
}
#elif defined(MOZ_WIDGET_ANDROID)
static nsresult Get(const char *argv0, char aResult[MAXPATHLEN])
{
// On Android, we use the GRE_HOME variable that is set by the Java
// bootstrap code.
const char *greHome = getenv("GRE_HOME");
if (!greHome)
return NS_ERROR_FAILURE;
snprintf(aResult, MAXPATHLEN, "%s/%s", greHome, "dummy");
aResult[MAXPATHLEN] = '\0';
return NS_OK;
}
#elif defined(XP_UNIX)
static nsresult Get(const char *argv0, 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(argv0, '/') && realpath(argv0, 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, argv0);
if (realpath(tmpPath, aResult) && stat(aResult, &fileStat) == 0) {
found = true;
break;
}
token = strtok(NULL, ":");
}
free(pathdup);
if (found)
return NS_OK;
return NS_ERROR_FAILURE;
}
#elif defined(XP_OS2)
static nsresult Get(const char *argv0, char aResult[MAXPATHLEN])
{
PPIB ppib;
PTIB ptib;
DosGetInfoBlocks( &ptib, &ppib);
DosQueryModuleName(ppib->pib_hmte, MAXPATHLEN, aResult);
}
#else
#error Oops, you need platform-specific code here
#endif
public:
static nsresult GetFile(const char *argv0, nsILocalFile* *aResult)
{
nsCOMPtr<nsILocalFile> lf;
#ifdef XP_WIN
PRUnichar exePath[MAXPATHLEN];
nsresult rv = GetW(argv0, exePath);
#else
char exePath[MAXPATHLEN];
nsresult rv = Get(argv0, 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;
}
};
}
#endif /* mozilla_BinaryPath_h */