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/* 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/. */
var EXPORTED_SYMBOLS = ["AboutSupportPlatform"];
// JS ctypes are needed to get at the data we need
var { ctypes } = ChromeUtils.importESModule(
"resource://gre/modules/ctypes.sys.mjs"
);
var BOOL = ctypes.int32_t;
var DRIVE_UNKNOWN = 0;
var DRIVE_NETWORK = 4;
var AboutSupportPlatform = {
/**
* Given an nsIFile, gets the file system type. The type is returned as a
* string. Possible values are "network", "local", "unknown" and null.
*/
getFileSystemType(aFile) {
let kernel32 = ctypes.open("kernel32.dll");
try {
// Returns the path of the volume a file is on.
let GetVolumePathName = kernel32.declare(
"GetVolumePathNameW",
ctypes.winapi_abi,
BOOL, // return type: 1 indicates success, 0 failure
ctypes.char16_t.ptr, // in: lpszFileName
ctypes.char16_t.ptr, // out: lpszVolumePathName
ctypes.uint32_t // in: cchBufferLength
);
// Returns the last error.
let GetLastError = kernel32.declare(
"GetLastError",
ctypes.winapi_abi,
ctypes.uint32_t // return type: the last error
);
let filePath = aFile.path;
// The volume path should be at most 1 greater than than the length of the
// path -- add 1 for a trailing backslash if necessary, and 1 for the
// terminating null character. Note that the parentheses around the type are
// necessary for new to apply correctly.
let volumePath = new (ctypes.char16_t.array(filePath.length + 2))();
if (!GetVolumePathName(filePath, volumePath, volumePath.length)) {
throw new Error(
"Unable to get volume path for " +
filePath +
", error " +
GetLastError()
);
}
// Returns the type of the drive.
let GetDriveType = kernel32.declare(
"GetDriveTypeW",
ctypes.winapi_abi,
ctypes.uint32_t, // return type: the drive type
ctypes.char16_t.ptr // in: lpRootPathName
);
let type = GetDriveType(volumePath);
// http://msdn.microsoft.com/en-us/library/aa364939
if (type == DRIVE_UNKNOWN) {
return "unknown";
} else if (type == DRIVE_NETWORK) {
return "network";
}
return "local";
} finally {
kernel32.close();
}
},
};
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