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gecko-dev/xpcom/io/nsLocalFileCommon.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
#include "nsLocalFile.h" // includes platform-specific headers
#include "nsString.h"
#include "nsCOMPtr.h"
#include "nsReadableUtils.h"
#include "nsPrintfCString.h"
#include "nsCRT.h"
#include "nsNativeCharsetUtils.h"
#include "nsUTF8Utils.h"
#include "nsArray.h"
#include "nsLocalFileCommon.h"
#ifdef XP_WIN
# include <string.h>
#endif
// Extensions that should be considered 'executable', ie will not allow users
// to open immediately without first saving to disk, and potentially provoke
// other warnings. PLEASE read the longer comment in
// toolkit/components/reputationservice/ApplicationReputation.cpp
// before modifying this list!
// If you update this list, make sure to update the length of sExecutableExts
// in nsLocalFileCommmon.h.
/* static */
const char* const sExecutableExts[] = {
// clang-format off
".accda", // MS Access database
".accdb", // MS Access database
".accde", // MS Access database
".accdr", // MS Access database
".ad",
".ade", // access project extension
".adp",
".afploc", // Apple Filing Protocol Location
".air", // Adobe AIR installer
".app", // executable application
".application", // from bug 348763
".appref-ms", // ClickOnce link
".appx",
".appxbundle",
".asp",
".atloc", // Appletalk Location
".bas",
".bat",
".cer", // Signed certificate file
".chm",
".cmd",
".com",
".cpl",
".crt",
".der",
".diagcab", // Windows archive
".exe",
".fileloc", // Apple finder internet location data file
".ftploc", // Apple FTP Location
".fxp", // FoxPro compiled app
".hlp",
".hta",
".inetloc", // Apple finder internet location data file
".inf",
".ins",
".isp",
".jar", // java application bundle
#ifndef MOZ_ESR
".jnlp",
#endif
".js",
".jse",
".library-ms", // Windows Library Files
".lnk",
".mad", // Access Module Shortcut
".maf", // Access
".mag", // Access Diagram Shortcut
".mam", // Access Macro Shortcut
".maq", // Access Query Shortcut
".mar", // Access Report Shortcut
".mas", // Access Stored Procedure
".mat", // Access Table Shortcut
".mau", // Media Attachment Unit
".mav", // Access View Shortcut
".maw", // Access Data Access Page
".mda", // Access Add-in, MDA Access 2 Workgroup
".mdb",
".mde",
".mdt", // Access Add-in Data
".mdw", // Access Workgroup Information
".mdz", // Access Wizard Template
".msc",
".msh", // Microsoft Shell
".msh1", // Microsoft Shell
".msh1xml", // Microsoft Shell
".msh2", // Microsoft Shell
".msh2xml", // Microsoft Shell
".mshxml", // Microsoft Shell
".msi",
".msix",
".msixbundle",
".msp",
".mst",
".ops", // Office Profile Settings
".pcd",
".pif",
".plg", // Developer Studio Build Log
".prf", // windows system file
".prg",
".pst",
".reg",
".scf", // Windows explorer command
".scr",
".sct",
".settingcontent-ms",
".shb",
".shs",
".url",
".vb",
".vbe",
".vbs",
".vdx",
".vsd",
".vsdm",
".vsdx",
".vsmacros", // Visual Studio .NET Binary-based Macro Project
".vss",
".vssm",
".vssx",
".vst",
".vstm",
".vstx",
".vsw",
".vsx",
".vtx",
".webloc", // MacOS website location file
".ws",
".wsc",
".wsf",
".wsh",
".xll", // MS Excel dynamic link library
".xrm-ms"
// clang-format on
};
#if !defined(MOZ_WIDGET_COCOA) && !defined(XP_WIN)
NS_IMETHODIMP
nsLocalFile::InitWithFile(nsIFile* aFile) {
if (NS_WARN_IF(!aFile)) {
return NS_ERROR_INVALID_ARG;
}
nsAutoCString path;
aFile->GetNativePath(path);
if (path.IsEmpty()) {
return NS_ERROR_INVALID_ARG;
}
return InitWithNativePath(path);
}
#endif
#define kMaxFilenameLength 255
#define kMaxExtensionLength 100
#define kMaxSequenceNumberLength 5 // "-9999"
// requirement: kMaxExtensionLength <
// kMaxFilenameLength - kMaxSequenceNumberLength
NS_IMETHODIMP
nsLocalFile::CreateUnique(uint32_t aType, uint32_t aAttributes) {
nsresult rv;
bool longName;
#ifdef XP_WIN
nsAutoString pathName, leafName, rootName, suffix;
rv = GetPath(pathName);
#else
nsAutoCString pathName, leafName, rootName, suffix;
rv = GetNativePath(pathName);
#endif
if (NS_FAILED(rv)) {
return rv;
}
auto FailedBecauseExists = [&](nsresult aRv) {
if (aRv == NS_ERROR_FILE_ACCESS_DENIED) {
bool exists;
return NS_SUCCEEDED(Exists(&exists)) && exists;
}
return aRv == NS_ERROR_FILE_ALREADY_EXISTS;
};
longName =
(pathName.Length() + kMaxSequenceNumberLength > kMaxFilenameLength);
if (!longName) {
rv = Create(aType, aAttributes);
if (!FailedBecauseExists(rv)) {
return rv;
}
}
#ifdef XP_WIN
rv = GetLeafName(leafName);
if (NS_FAILED(rv)) {
return rv;
}
const int32_t lastDot = leafName.RFindChar(char16_t('.'));
#else
rv = GetNativeLeafName(leafName);
if (NS_FAILED(rv)) {
return rv;
}
const int32_t lastDot = leafName.RFindChar('.');
#endif
if (lastDot == kNotFound) {
rootName = leafName;
} else {
suffix = Substring(leafName, lastDot); // include '.'
rootName = Substring(leafName, 0, lastDot); // strip suffix and dot
}
if (longName) {
int32_t maxRootLength =
(kMaxFilenameLength - (pathName.Length() - leafName.Length()) -
suffix.Length() - kMaxSequenceNumberLength);
// We cannot create an item inside a directory whose name is too long.
// Also, ensure that at least one character remains after we truncate
// the root name, as we don't want to end up with an empty leaf name.
if (maxRootLength < 2) {
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
#ifdef XP_WIN
// ensure that we don't cut the name in mid-UTF16-character
rootName.SetLength(NS_IS_LOW_SURROGATE(rootName[maxRootLength])
? maxRootLength - 1
: maxRootLength);
SetLeafName(rootName + suffix);
#else
if (NS_IsNativeUTF8()) {
// ensure that we don't cut the name in mid-UTF8-character
// (assume the name is valid UTF8 to begin with)
while (UTF8traits::isInSeq(rootName[maxRootLength])) {
--maxRootLength;
}
// Another check to avoid ending up with an empty leaf name.
if (maxRootLength == 0 && suffix.IsEmpty()) {
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
}
rootName.SetLength(maxRootLength);
SetNativeLeafName(rootName + suffix);
#endif
nsresult rvCreate = Create(aType, aAttributes);
if (!FailedBecauseExists(rvCreate)) {
return rvCreate;
}
}
for (int indx = 1; indx < 10000; ++indx) {
// start with "Picture-1.jpg" after "Picture.jpg" exists
#ifdef XP_WIN
SetLeafName(rootName +
NS_ConvertASCIItoUTF16(nsPrintfCString("-%d", indx)) + suffix);
#else
SetNativeLeafName(rootName + nsPrintfCString("-%d", indx) + suffix);
#endif
rv = Create(aType, aAttributes);
if (NS_SUCCEEDED(rv) || !FailedBecauseExists(rv)) {
return rv;
}
}
// The disk is full, sort of
return NS_ERROR_FILE_TOO_BIG;
}
#if defined(XP_WIN)
static const char16_t kPathSeparatorChar = '\\';
#elif defined(XP_UNIX)
static const char16_t kPathSeparatorChar = '/';
#else
# error Need to define file path separator for your platform
#endif
static void SplitPath(char16_t* aPath, nsTArray<char16_t*>& aNodeArray) {
if (*aPath == 0) {
return;
}
if (*aPath == kPathSeparatorChar) {
aPath++;
}
aNodeArray.AppendElement(aPath);
for (char16_t* cp = aPath; *cp != 0; ++cp) {
if (*cp == kPathSeparatorChar) {
*cp++ = 0;
if (*cp == 0) {
break;
}
aNodeArray.AppendElement(cp);
}
}
}
NS_IMETHODIMP
nsLocalFile::GetRelativeDescriptor(nsIFile* aFromFile, nsACString& aResult) {
if (NS_WARN_IF(!aFromFile)) {
return NS_ERROR_INVALID_ARG;
}
//
// aResult will be UTF-8 encoded
//
nsresult rv;
aResult.Truncate(0);
nsAutoString thisPath, fromPath;
AutoTArray<char16_t*, 32> thisNodes;
AutoTArray<char16_t*, 32> fromNodes;
rv = GetPath(thisPath);
if (NS_FAILED(rv)) {
return rv;
}
rv = aFromFile->GetPath(fromPath);
if (NS_FAILED(rv)) {
return rv;
}
// get raw pointer to mutable string buffer
char16_t* thisPathPtr = thisPath.BeginWriting();
char16_t* fromPathPtr = fromPath.BeginWriting();
SplitPath(thisPathPtr, thisNodes);
SplitPath(fromPathPtr, fromNodes);
size_t nodeIndex;
for (nodeIndex = 0;
nodeIndex < thisNodes.Length() && nodeIndex < fromNodes.Length();
++nodeIndex) {
#ifdef XP_WIN
if (_wcsicmp(char16ptr_t(thisNodes[nodeIndex]),
char16ptr_t(fromNodes[nodeIndex]))) {
break;
}
#else
if (nsCRT::strcmp(thisNodes[nodeIndex], fromNodes[nodeIndex])) {
break;
}
#endif
}
size_t branchIndex = nodeIndex;
for (nodeIndex = branchIndex; nodeIndex < fromNodes.Length(); ++nodeIndex) {
aResult.AppendLiteral("../");
}
StringJoinAppend(aResult, "/"_ns, mozilla::Span{thisNodes}.From(branchIndex),
[](nsACString& dest, const auto& thisNode) {
// XXX(Bug 1682869) We wouldn't need to reconstruct a
// nsDependentString here if SplitPath already returned
// nsDependentString. In fact, it seems SplitPath might be
// replaced by ParseString?
AppendUTF16toUTF8(nsDependentString{thisNode}, dest);
});
return NS_OK;
}
NS_IMETHODIMP
nsLocalFile::SetRelativeDescriptor(nsIFile* aFromFile,
const nsACString& aRelativeDesc) {
constexpr auto kParentDirStr = "../"_ns;
nsCOMPtr<nsIFile> targetFile;
nsresult rv = aFromFile->Clone(getter_AddRefs(targetFile));
if (NS_FAILED(rv)) {
return rv;
}
//
// aRelativeDesc is UTF-8 encoded
//
nsCString::const_iterator strBegin, strEnd;
aRelativeDesc.BeginReading(strBegin);
aRelativeDesc.EndReading(strEnd);
nsCString::const_iterator nodeBegin(strBegin), nodeEnd(strEnd);
nsCString::const_iterator pos(strBegin);
nsCOMPtr<nsIFile> parentDir;
while (FindInReadable(kParentDirStr, nodeBegin, nodeEnd)) {
rv = targetFile->GetParent(getter_AddRefs(parentDir));
if (NS_FAILED(rv)) {
return rv;
}
if (!parentDir) {
return NS_ERROR_FILE_UNRECOGNIZED_PATH;
}
targetFile = parentDir;
nodeBegin = nodeEnd;
pos = nodeEnd;
nodeEnd = strEnd;
}
nodeBegin = nodeEnd = pos;
while (nodeEnd != strEnd) {
FindCharInReadable('/', nodeEnd, strEnd);
targetFile->Append(NS_ConvertUTF8toUTF16(Substring(nodeBegin, nodeEnd)));
if (nodeEnd != strEnd) { // If there's more left in the string, inc over
// the '/' nodeEnd is on.
++nodeEnd;
}
nodeBegin = nodeEnd;
}
return InitWithFile(targetFile);
}
NS_IMETHODIMP
nsLocalFile::GetRelativePath(nsIFile* aFromFile, nsACString& aResult) {
return GetRelativeDescriptor(aFromFile, aResult);
}
NS_IMETHODIMP
nsLocalFile::SetRelativePath(nsIFile* aFromFile,
const nsACString& aRelativePath) {
return SetRelativeDescriptor(aFromFile, aRelativePath);
}
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