Adding upstream version 7.0.6-dfsg.upstream/7.0.6-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1724 insertions, 0 deletions

diff --git a/src/libs/xpcom18a4/xpcom/io/nsLocalFileUnix.cpp b/src/libs/xpcom18a4/xpcom/io/nsLocalFileUnix.cpp
new file mode 100644
index 00000000..eef17bde
--- /dev/null
+++ b/src/libs/xpcom18a4/xpcom/io/nsLocalFileUnix.cpp
@@ -0,0 +1,1724 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* ***** 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 Communicator client code, released
+ * March 31, 1998.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 1998-1999
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Mike Shaver            <shaver@mozilla.org>
+ *   Christopher Blizzard   <blizzard@mozilla.org>
+ *   Jason Eager            <jce2@po.cwru.edu>
+ *   Stuart Parmenter       <pavlov@netscape.com>
+ *   Brendan Eich           <brendan@mozilla.org>
+ *   Pete Collins           <petejc@mozdev.org>
+ *   Paul Ashford           <arougthopher@lizardland.net>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either of 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 ***** */
+
+/**
+ * Implementation of nsIFile for ``Unixy'' systems.
+ */
+
+// We're going to need some autoconf loving, I can just tell.
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <utime.h>
+#include <dirent.h>
+#include <ctype.h>
+#include <locale.h>
+#ifdef XP_BEOS
+    #include <Path.h>
+    #include <Entry.h>
+    #include <Roster.h>
+#endif
+#if defined(VMS)
+    #include <fabdef.h>
+#endif
+
+#include "nsDirectoryServiceDefs.h"
+#include "nsCRT.h"
+#include "nsCOMPtr.h"
+#include "nsMemory.h"
+#include "nsIFile.h"
+#include "nsString.h"
+#include "nsReadableUtils.h"
+#include "nsLocalFile.h"
+#include "nsIComponentManager.h"
+#include "nsXPIDLString.h"
+#include "prproces.h"
+#include "nsISimpleEnumerator.h"
+#include "nsITimelineService.h"
+
+#include "nsNativeCharsetUtils.h"
+
+// On some platforms file/directory name comparisons need to
+// be case-blind.
+#if defined(VMS)
+    #define FILE_STRCMP strcasecmp
+    #define FILE_STRNCMP strncasecmp
+#else
+    #define FILE_STRCMP strcmp
+    #define FILE_STRNCMP strncmp
+#endif
+
+#define VALIDATE_STAT_CACHE()                   \
+    PR_BEGIN_MACRO                              \
+        if (!mHaveCachedStat) {                 \
+            FillStatCache();                    \
+            if (!mHaveCachedStat)               \
+                 return NSRESULT_FOR_ERRNO();   \
+        }                                       \
+    PR_END_MACRO
+
+#define CHECK_mPath()                           \
+    PR_BEGIN_MACRO                              \
+        if (mPath.IsEmpty())                    \
+            return NS_ERROR_NOT_INITIALIZED;    \
+    PR_END_MACRO
+
+/* directory enumerator */
+class NS_COM
+nsDirEnumeratorUnix : public nsISimpleEnumerator
+{
+    public:
+    nsDirEnumeratorUnix();
+
+    // nsISupports interface
+    NS_DECL_ISUPPORTS
+
+    // nsISimpleEnumerator interface
+    NS_DECL_NSISIMPLEENUMERATOR
+
+    NS_IMETHOD Init(nsLocalFile *parent, PRBool ignored);
+
+    private:
+    ~nsDirEnumeratorUnix();
+
+    protected:
+    NS_IMETHOD GetNextEntry();
+
+    DIR           *mDir;
+    struct dirent *mEntry;
+    nsCString      mParentPath;
+};
+
+nsDirEnumeratorUnix::nsDirEnumeratorUnix() :
+                         mDir(nsnull), 
+                         mEntry(nsnull)
+{
+}
+
+nsDirEnumeratorUnix::~nsDirEnumeratorUnix()
+{
+    if (mDir)
+        closedir(mDir);
+}
+
+NS_IMPL_ISUPPORTS1(nsDirEnumeratorUnix, nsISimpleEnumerator)
+
+NS_IMETHODIMP
+nsDirEnumeratorUnix::Init(nsLocalFile *parent, PRBool resolveSymlinks /*ignored*/)
+{
+    nsCAutoString dirPath;
+    if (NS_FAILED(parent->GetNativePath(dirPath)) ||
+        dirPath.IsEmpty()) {
+        return NS_ERROR_FILE_INVALID_PATH;
+    }
+
+    if (NS_FAILED(parent->GetNativePath(mParentPath)))
+        return NS_ERROR_FAILURE;
+
+    mDir = opendir(dirPath.get());
+    if (!mDir)
+        return NSRESULT_FOR_ERRNO();
+    return GetNextEntry();
+}
+
+NS_IMETHODIMP
+nsDirEnumeratorUnix::HasMoreElements(PRBool *result)
+{
+    *result = mDir && mEntry;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsDirEnumeratorUnix::GetNext(nsISupports **_retval)
+{
+    nsresult rv;
+    if (!mDir || !mEntry) {
+        *_retval = nsnull;
+        return NS_OK;
+    }
+
+    nsLocalFile* file = new nsLocalFile();
+    if (!file)
+        return NS_ERROR_OUT_OF_MEMORY;
+
+    if (NS_FAILED(rv = file->InitWithNativePath(mParentPath)) ||
+        NS_FAILED(rv = file->AppendNative(nsDependentCString(mEntry->d_name)))) {
+        return rv;
+    }
+    *_retval = NS_STATIC_CAST(nsISupports *, file);
+    NS_ADDREF(*_retval);
+    return GetNextEntry();
+}
+
+NS_IMETHODIMP
+nsDirEnumeratorUnix::GetNextEntry()
+{
+    do {
+        errno = 0;
+        mEntry = readdir(mDir);
+
+        // end of dir or error
+        if (!mEntry)
+            return NSRESULT_FOR_ERRNO();
+
+        // keep going past "." and ".."
+    } while (mEntry->d_name[0] == '.'     &&
+            (mEntry->d_name[1] == '\0'    ||   // .\0
+            (mEntry->d_name[1] == '.'     &&
+            mEntry->d_name[2] == '\0')));      // ..\0
+    return NS_OK;
+}
+
+nsLocalFile::nsLocalFile() :
+    mHaveCachedStat(PR_FALSE)
+{
+}
+
+nsLocalFile::nsLocalFile(const nsLocalFile& other)
+  : mCachedStat(other.mCachedStat)
+  , mPath(other.mPath)
+  , mHaveCachedStat(other.mHaveCachedStat)
+{
+}
+
+NS_IMPL_THREADSAFE_ISUPPORTS2(nsLocalFile,
+                              nsIFile,
+                              nsILocalFile)
+
+nsresult
+nsLocalFile::nsLocalFileConstructor(nsISupports *outer, 
+                                    const nsIID &aIID,
+                                    void **aInstancePtr)
+{
+    NS_ENSURE_ARG_POINTER(aInstancePtr);
+    NS_ENSURE_NO_AGGREGATION(outer);
+
+    *aInstancePtr = nsnull;
+
+    nsCOMPtr<nsIFile> inst = new nsLocalFile();
+    if (!inst)
+        return NS_ERROR_OUT_OF_MEMORY;
+    return inst->QueryInterface(aIID, aInstancePtr);
+}
+
+nsresult 
+nsLocalFile::FillStatCache() {
+    if (stat(mPath.get(), &mCachedStat) == -1) {
+        // try lstat it may be a symlink
+        if (lstat(mPath.get(), &mCachedStat) == -1) {
+            return NSRESULT_FOR_ERRNO();
+        }
+    }
+    mHaveCachedStat = PR_TRUE;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::Clone(nsIFile **file)
+{
+    // Just copy-construct ourselves
+    *file = new nsLocalFile(*this);
+    if (!*file)
+      return NS_ERROR_OUT_OF_MEMORY;
+
+    NS_ADDREF(*file);
+    
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::InitWithNativePath(const nsACString &filePath)
+{
+    if (Substring(filePath, 0, 2).EqualsLiteral("~/")) {
+        nsCOMPtr<nsIFile> homeDir;
+        nsCAutoString homePath;
+        if (NS_FAILED(NS_GetSpecialDirectory(NS_OS_HOME_DIR,
+                                             getter_AddRefs(homeDir))) ||
+            NS_FAILED(homeDir->GetNativePath(homePath))) {
+            return NS_ERROR_FAILURE;
+        }
+        
+        mPath = homePath + Substring(filePath, 1, filePath.Length() - 1);
+    } else if (filePath.IsEmpty() || filePath.First() != '/') {
+      NS_ERROR("Relative paths not allowed");
+      return NS_ERROR_FILE_UNRECOGNIZED_PATH;
+    } else {
+        mPath = filePath;
+    }
+
+    // trim off trailing slashes
+    ssize_t len = mPath.Length();
+    while ((len > 1) && (mPath[len - 1] == '/'))
+        --len;
+    mPath.SetLength(len);
+
+    InvalidateCache();
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::CreateAllAncestors(PRUint32 permissions)
+{
+    // <jband> I promise to play nice
+    char *buffer = mPath.BeginWriting(),
+         *slashp = buffer;
+
+#ifdef DEBUG_NSIFILE
+    fprintf(stderr, "nsIFile: before: %s\n", buffer);
+#endif
+
+    while ((slashp = strchr(slashp + 1, '/'))) {
+        /*
+         * Sequences of '/' are equivalent to a single '/'.
+         */
+        if (slashp[1] == '/')
+            continue;
+
+        /*
+         * If the path has a trailing slash, don't make the last component,
+         * because we'll get EEXIST in Create when we try to build the final
+         * component again, and it's easier to condition the logic here than
+         * there.
+         */
+        if (slashp[1] == '\0')
+            break;
+
+        /* Temporarily NUL-terminate here */
+        *slashp = '\0';
+#ifdef DEBUG_NSIFILE
+        fprintf(stderr, "nsIFile: mkdir(\"%s\")\n", buffer);
+#endif
+        int mkdir_result = mkdir(buffer, permissions);
+        int mkdir_errno  = errno;
+        if (mkdir_result == -1) {
+            /*
+             * Always set |errno| to EEXIST if the dir already exists
+             * (we have to do this here since the errno value is not consistent
+             * in all cases - various reasons like different platform,
+             * automounter-controlled dir, etc. can affect it (see bug 125489
+             * for details)).
+             */
+            if (access(buffer, F_OK) == 0) {
+                mkdir_errno = EEXIST;
+            }
+        }
+
+        /* Put the / back before we (maybe) return */
+        *slashp = '/';
+
+        /*
+         * We could get EEXIST for an existing file -- not directory --
+         * with the name of one of our ancestors, but that's OK: we'll get
+         * ENOTDIR when we try to make the next component in the path,
+         * either here on back in Create, and error out appropriately.
+         */
+        if (mkdir_result == -1 && mkdir_errno != EEXIST)
+            return nsresultForErrno(mkdir_errno);
+    }
+
+#ifdef DEBUG_NSIFILE
+    fprintf(stderr, "nsIFile: after: %s\n", buffer);
+#endif
+
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::OpenNSPRFileDesc(PRInt32 flags, PRInt32 mode, PRFileDesc **_retval)
+{
+    *_retval = PR_Open(mPath.get(), flags, mode);
+    if (! *_retval)
+        return NS_ErrorAccordingToNSPR();
+
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::OpenANSIFileDesc(const char *mode, FILE **_retval)
+{
+    *_retval = fopen(mPath.get(), mode);
+    if (! *_retval)
+        return NS_ERROR_FAILURE;
+
+    return NS_OK;
+}
+
+static int
+do_create(const char *path, PRIntn flags, mode_t mode, PRFileDesc **_retval)
+{
+    *_retval = PR_Open(path, flags, mode);
+    return *_retval ? 0 : -1;
+}
+
+static int
+do_mkdir(const char *path, PRIntn flags, mode_t mode, PRFileDesc **_retval)
+{
+    *_retval = nsnull;
+    return mkdir(path, mode);
+}
+
+nsresult
+nsLocalFile::CreateAndKeepOpen(PRUint32 type, PRIntn flags,
+                               PRUint32 permissions, PRFileDesc **_retval)
+{
+    if (type != NORMAL_FILE_TYPE && type != DIRECTORY_TYPE)
+        return NS_ERROR_FILE_UNKNOWN_TYPE;
+
+    int result;
+    int (*createFunc)(const char *, PRIntn, mode_t, PRFileDesc **) =
+        (type == NORMAL_FILE_TYPE) ? do_create : do_mkdir;
+
+    result = createFunc(mPath.get(), flags, permissions, _retval);
+    if (result == -1 && errno == ENOENT) {
+        /*
+         * If we failed because of missing ancestor components, try to create
+         * them and then retry the original creation.
+         *
+         * Ancestor directories get the same permissions as the file we're
+         * creating, with the X bit set for each of (user,group,other) with
+         * an R bit in the original permissions.    If you want to do anything
+         * fancy like setgid or sticky bits, do it by hand.
+         */
+        int dirperm = permissions;
+        if (permissions & S_IRUSR)
+            dirperm |= S_IXUSR;
+        if (permissions & S_IRGRP)
+            dirperm |= S_IXGRP;
+        if (permissions & S_IROTH)
+            dirperm |= S_IXOTH;
+
+#ifdef DEBUG_NSIFILE
+        fprintf(stderr, "nsIFile: perm = %o, dirperm = %o\n", permissions,
+                dirperm);
+#endif
+
+        if (NS_FAILED(CreateAllAncestors(dirperm)))
+            return NS_ERROR_FAILURE;
+
+#ifdef DEBUG_NSIFILE
+        fprintf(stderr, "nsIFile: Create(\"%s\") again\n", mPath.get());
+#endif
+        result = createFunc(mPath.get(), flags, permissions, _retval);
+    }
+
+    return NSRESULT_FOR_RETURN(result);
+}
+
+NS_IMETHODIMP
+nsLocalFile::Create(PRUint32 type, PRUint32 permissions)
+{
+    PRFileDesc *junk = nsnull;
+    nsresult rv = CreateAndKeepOpen(type,
+                                    PR_WRONLY | PR_CREATE_FILE | PR_TRUNCATE |
+                                    PR_EXCL,
+                                    permissions,
+                                    &junk);
+    if (junk)
+        PR_Close(junk);
+    return rv;
+}
+
+NS_IMETHODIMP
+nsLocalFile::AppendNative(const nsACString &fragment)
+{
+    if (fragment.IsEmpty())
+        return NS_OK;
+
+    // only one component of path can be appended
+    nsACString::const_iterator begin, end;
+    if (FindCharInReadable('/', fragment.BeginReading(begin),
+                                fragment.EndReading(end)))
+        return NS_ERROR_FILE_UNRECOGNIZED_PATH;
+
+    return AppendRelativeNativePath(fragment);
+}
+
+NS_IMETHODIMP
+nsLocalFile::AppendRelativeNativePath(const nsACString &fragment)
+{
+    if (fragment.IsEmpty())
+        return NS_OK;
+
+    // No leading '/' 
+    if (fragment.First() == '/')
+        return NS_ERROR_FILE_UNRECOGNIZED_PATH;
+
+    if (mPath.EqualsLiteral("/"))
+        mPath.Append(fragment);
+    else
+        mPath.Append(NS_LITERAL_CSTRING("/") + fragment);
+
+    InvalidateCache();
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::Normalize()
+{
+    char    resolved_path[PATH_MAX] = "";
+    char *resolved_path_ptr = nsnull;
+
+#ifdef XP_BEOS
+    BEntry be_e(mPath.get(), true);
+    BPath be_p;
+    status_t err;
+    if ((err = be_e.GetPath(&be_p)) == B_OK) {
+        resolved_path_ptr = (char *)be_p.Path();
+        PL_strncpyz(resolved_path, resolved_path_ptr, PATH_MAX - 1);
+    }
+#else
+    resolved_path_ptr = realpath(mPath.get(), resolved_path);
+#endif
+    // if there is an error, the return is null.
+    if (!resolved_path_ptr)
+        return NSRESULT_FOR_ERRNO();
+
+    mPath = resolved_path;
+    return NS_OK;
+}
+
+void
+nsLocalFile::LocateNativeLeafName(nsACString::const_iterator &begin, 
+                                  nsACString::const_iterator &end)
+{
+    // XXX perhaps we should cache this??
+
+    mPath.BeginReading(begin);
+    mPath.EndReading(end);
+    
+    nsACString::const_iterator it = end;
+    nsACString::const_iterator stop = begin;
+    --stop;
+    while (--it != stop) {
+        if (*it == '/') {
+            begin = ++it;
+            return;
+        }
+    }
+    // else, the entire path is the leaf name (which means this
+    // isn't an absolute path... unexpected??)
+}
+
+NS_IMETHODIMP
+nsLocalFile::GetNativeLeafName(nsACString &aLeafName)
+{
+    nsACString::const_iterator begin, end;
+    LocateNativeLeafName(begin, end);
+    aLeafName = Substring(begin, end);
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::SetNativeLeafName(const nsACString &aLeafName)
+{
+    nsACString::const_iterator begin, end;
+    LocateNativeLeafName(begin, end);
+    mPath.Replace(begin.get() - mPath.get(), Distance(begin, end), aLeafName);
+    InvalidateCache();
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::GetNativePath(nsACString &_retval)
+{
+    _retval = mPath;
+    return NS_OK;
+}
+
+nsresult
+nsLocalFile::GetNativeTargetPathName(nsIFile *newParent, 
+                                     const nsACString &newName,
+                                     nsACString &_retval)
+{
+    nsresult rv;
+    nsCOMPtr<nsIFile> oldParent;
+
+    if (!newParent) {
+        if (NS_FAILED(rv = GetParent(getter_AddRefs(oldParent))))
+            return rv;
+        newParent = oldParent.get();
+    } else {
+        // check to see if our target directory exists
+        PRBool targetExists;
+        if (NS_FAILED(rv = newParent->Exists(&targetExists)))
+            return rv;
+
+        if (!targetExists) {
+            // XXX create the new directory with some permissions
+            rv = newParent->Create(DIRECTORY_TYPE, 0700);
+            if (NS_FAILED(rv))
+                return rv;
+        } else {
+            // make sure that the target is actually a directory
+            PRBool targetIsDirectory;
+            if (NS_FAILED(rv = newParent->IsDirectory(&targetIsDirectory)))
+                return rv;
+            if (!targetIsDirectory)
+                return NS_ERROR_FILE_DESTINATION_NOT_DIR;
+        }
+    }
+
+    nsACString::const_iterator nameBegin, nameEnd;
+    if (!newName.IsEmpty()) {
+        newName.BeginReading(nameBegin);
+        newName.EndReading(nameEnd);
+    }
+    else
+        LocateNativeLeafName(nameBegin, nameEnd);
+
+    nsCAutoString dirName;
+    if (NS_FAILED(rv = newParent->GetNativePath(dirName)))
+        return rv;
+
+    _retval = dirName
+            + NS_LITERAL_CSTRING("/")
+            + Substring(nameBegin, nameEnd);
+    return NS_OK;
+}
+
+nsresult
+nsLocalFile::CopyDirectoryTo(nsIFile *newParent)
+{
+    nsresult rv;
+    /*
+     * dirCheck is used for various boolean test results such as from Equals,
+     * Exists, isDir, etc.
+     */
+    PRBool dirCheck, isSymlink;
+    PRUint32 oldPerms;
+
+    if (NS_FAILED((rv = IsDirectory(&dirCheck))))
+        return rv;
+    if (!dirCheck)
+        return CopyToNative(newParent, EmptyCString());
+    
+    if (NS_FAILED(rv = Equals(newParent, &dirCheck)))
+        return rv;
+    if (dirCheck) { 
+        // can't copy dir to itself
+        return NS_ERROR_INVALID_ARG;
+    }
+    
+    if (NS_FAILED(rv = newParent->Exists(&dirCheck))) 
+        return rv;
+    // get the dirs old permissions
+    if (NS_FAILED(rv = GetPermissions(&oldPerms)))
+        return rv;
+    if (!dirCheck) {
+        if (NS_FAILED(rv = newParent->Create(DIRECTORY_TYPE, oldPerms)))
+            return rv;
+    } else {    // dir exists lets try to use leaf
+        nsCAutoString leafName;
+        if (NS_FAILED(rv = GetNativeLeafName(leafName)))
+            return rv;
+        if (NS_FAILED(rv = newParent->AppendNative(leafName)))
+            return rv;
+        if (NS_FAILED(rv = newParent->Exists(&dirCheck)))
+            return rv;
+        if (dirCheck) 
+            return NS_ERROR_FILE_ALREADY_EXISTS; // dest exists
+        if (NS_FAILED(rv = newParent->Create(DIRECTORY_TYPE, oldPerms)))
+            return rv;
+    }
+
+    nsCOMPtr<nsISimpleEnumerator> dirIterator;
+    if (NS_FAILED(rv = GetDirectoryEntries(getter_AddRefs(dirIterator))))
+        return rv;
+
+    PRBool hasMore = PR_FALSE;
+    while (dirIterator->HasMoreElements(&hasMore), hasMore) {
+        nsCOMPtr<nsIFile> entry;
+        rv = dirIterator->GetNext((nsISupports**)getter_AddRefs(entry));
+        if (NS_FAILED(rv)) 
+            continue;
+        if (NS_FAILED(rv = entry->IsSymlink(&isSymlink)))
+            return rv;
+        if (NS_FAILED(rv = entry->IsDirectory(&dirCheck)))
+            return rv;
+        if (dirCheck && !isSymlink) {
+            nsCOMPtr<nsIFile> destClone;
+            rv = newParent->Clone(getter_AddRefs(destClone));
+            if (NS_SUCCEEDED(rv)) {
+                nsCOMPtr<nsILocalFile> newDir(do_QueryInterface(destClone));
+                if (NS_FAILED(rv = entry->CopyToNative(newDir, EmptyCString()))) {
+#ifdef DEBUG
+                    nsresult rv2;
+                    nsCAutoString pathName;
+                    if (NS_FAILED(rv2 = entry->GetNativePath(pathName)))
+                        return rv2;
+                    printf("Operation not supported: %s\n", pathName.get());
+#endif
+                    if (rv == NS_ERROR_OUT_OF_MEMORY) 
+                        return rv;
+                    continue;
+                }
+            }
+        } else {
+            if (NS_FAILED(rv = entry->CopyToNative(newParent, EmptyCString()))) {
+#ifdef DEBUG
+                nsresult rv2;
+                nsCAutoString pathName;
+                if (NS_FAILED(rv2 = entry->GetNativePath(pathName)))
+                    return rv2;
+                printf("Operation not supported: %s\n", pathName.get());
+#endif
+                if (rv == NS_ERROR_OUT_OF_MEMORY) 
+                    return rv;
+                continue;
+            }
+        }
+    }
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::CopyToNative(nsIFile *newParent, const nsACString &newName)
+{
+    nsresult rv;
+    // check to make sure that this has been initialized properly
+    CHECK_mPath();
+
+    // we copy the parent here so 'newParent' remains immutable
+    nsCOMPtr <nsIFile> workParent;
+    if (newParent) {
+        if (NS_FAILED(rv = newParent->Clone(getter_AddRefs(workParent))))
+            return rv;
+    } else {
+        if (NS_FAILED(rv = GetParent(getter_AddRefs(workParent))))
+            return rv;
+    }
+    
+    // check to see if we are a directory or if we are a file
+    PRBool isDirectory;
+    if (NS_FAILED(rv = IsDirectory(&isDirectory)))
+        return rv;
+
+    nsCAutoString newPathName;
+    if (isDirectory) {
+        if (!newName.IsEmpty()) {
+            if (NS_FAILED(rv = workParent->AppendNative(newName)))
+                return rv;
+        } else {
+            if (NS_FAILED(rv = GetNativeLeafName(newPathName)))
+                return rv;
+            if (NS_FAILED(rv = workParent->AppendNative(newPathName)))
+                return rv;
+        }
+        if (NS_FAILED(rv = CopyDirectoryTo(workParent)))
+            return rv;
+    } else {
+        rv = GetNativeTargetPathName(workParent, newName, newPathName);
+        if (NS_FAILED(rv)) 
+            return rv;
+
+#ifdef DEBUG_blizzard
+        printf("nsLocalFile::CopyTo() %s -> %s\n", mPath.get(), newPathName.get());
+#endif
+
+        // actually create the file.
+        nsLocalFile *newFile = new nsLocalFile();
+        if (!newFile)
+            return NS_ERROR_OUT_OF_MEMORY;
+
+        nsCOMPtr<nsILocalFile> fileRef(newFile); // release on exit
+
+        rv = newFile->InitWithNativePath(newPathName);
+        if (NS_FAILED(rv))
+            return rv;
+
+        // get the old permissions
+        PRUint32 myPerms;
+        GetPermissions(&myPerms);
+
+        // Create the new file with the old file's permissions, even if write
+        // permission is missing.  We can't create with write permission and
+        // then change back to myPerm on all filesystems (FAT on Linux, e.g.).
+        // But we can write to a read-only file on all Unix filesystems if we
+        // open it successfully for writing.
+
+        PRFileDesc *newFD;
+        rv = newFile->CreateAndKeepOpen(NORMAL_FILE_TYPE,
+                                        PR_WRONLY|PR_CREATE_FILE|PR_TRUNCATE,
+                                        myPerms,
+                                        &newFD);
+        if (NS_FAILED(rv))
+            return rv;
+
+        // open the old file, too
+        PRBool specialFile;
+        if (NS_FAILED(rv = IsSpecial(&specialFile))) {
+            PR_Close(newFD);
+            return rv;
+        }
+        if (specialFile) {
+#ifdef DEBUG
+            printf("Operation not supported: %s\n", mPath.get());
+#endif
+            // make sure to clean up properly
+            PR_Close(newFD);
+            return NS_OK;
+        }
+               
+        PRFileDesc *oldFD;
+        rv = OpenNSPRFileDesc(PR_RDONLY, myPerms, &oldFD);
+        if (NS_FAILED(rv)) {
+            // make sure to clean up properly
+            PR_Close(newFD);
+            return rv;
+        }
+
+#ifdef DEBUG_blizzard
+        PRInt32 totalRead = 0;
+        PRInt32 totalWritten = 0;
+#endif
+        char buf[BUFSIZ];
+        PRInt32 bytesRead;
+        
+        while ((bytesRead = PR_Read(oldFD, buf, BUFSIZ)) > 0) {
+#ifdef DEBUG_blizzard
+            totalRead += bytesRead;
+#endif
+
+            // PR_Write promises never to do a short write
+            PRInt32 bytesWritten = PR_Write(newFD, buf, bytesRead);
+            if (bytesWritten < 0) {
+                bytesRead = -1;
+                break;
+            }
+            NS_ASSERTION(bytesWritten == bytesRead, "short PR_Write?");
+
+#ifdef DEBUG_blizzard
+            totalWritten += bytesWritten;
+#endif
+        }
+
+#ifdef DEBUG_blizzard
+        printf("read %d bytes, wrote %d bytes\n",
+                 totalRead, totalWritten);
+#endif
+
+        // close the files
+        PR_Close(newFD);
+        PR_Close(oldFD);
+
+        // check for read (or write) error after cleaning up
+        if (bytesRead < 0) 
+            return NS_ERROR_OUT_OF_MEMORY;
+    }
+    return rv;
+}
+
+NS_IMETHODIMP
+nsLocalFile::CopyToFollowingLinksNative(nsIFile *newParent, const nsACString &newName)
+{
+    return CopyToNative(newParent, newName);
+}
+
+NS_IMETHODIMP
+nsLocalFile::MoveToNative(nsIFile *newParent, const nsACString &newName)
+{
+    nsresult rv;
+
+    // check to make sure that this has been initialized properly
+    CHECK_mPath();
+
+    // check to make sure that we have a new parent
+    nsCAutoString newPathName;
+    rv = GetNativeTargetPathName(newParent, newName, newPathName);
+    if (NS_FAILED(rv))
+        return rv;
+
+    // try for atomic rename, falling back to copy/delete
+    if (rename(mPath.get(), newPathName.get()) < 0) {
+#ifdef VMS
+        if (errno == EXDEV || errno == ENXIO) {
+#else
+        if (errno == EXDEV) {
+#endif
+            rv = CopyToNative(newParent, newName);
+            if (NS_SUCCEEDED(rv))
+                rv = Remove(PR_TRUE);
+        } else {
+            rv = NSRESULT_FOR_ERRNO();
+        }
+    }
+    return rv;
+}
+
+NS_IMETHODIMP
+nsLocalFile::Remove(PRBool recursive)
+{
+    CHECK_mPath();
+
+    VALIDATE_STAT_CACHE();
+    PRBool isSymLink, isDir;
+    
+    nsresult rv = IsSymlink(&isSymLink);
+    if (NS_FAILED(rv))
+        return rv;
+
+    if (!recursive && isSymLink)
+        return NSRESULT_FOR_RETURN(unlink(mPath.get()));
+    
+    isDir = S_ISDIR(mCachedStat.st_mode);
+    InvalidateCache();
+    if (isDir) {
+        if (recursive) {
+            nsDirEnumeratorUnix *dir = new nsDirEnumeratorUnix();
+            if (!dir)
+                return NS_ERROR_OUT_OF_MEMORY;
+
+            nsCOMPtr<nsISimpleEnumerator> dirRef(dir); // release on exit
+
+            rv = dir->Init(this, PR_FALSE);
+            if (NS_FAILED(rv))
+                return rv;
+
+            PRBool more;
+            while (dir->HasMoreElements(&more), more) {
+                nsCOMPtr<nsISupports> item;
+                rv = dir->GetNext(getter_AddRefs(item));
+                if (NS_FAILED(rv))
+                    return NS_ERROR_FAILURE;
+
+                nsCOMPtr<nsIFile> file = do_QueryInterface(item, &rv);
+                if (NS_FAILED(rv))
+                    return NS_ERROR_FAILURE;
+                if (NS_FAILED(rv = file->Remove(recursive)))
+                    return rv;
+            }
+        }
+
+        if (rmdir(mPath.get()) == -1)
+            return NSRESULT_FOR_ERRNO();
+    } else {
+        if (unlink(mPath.get()) == -1)
+            return NSRESULT_FOR_ERRNO();
+    }
+
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::GetLastModifiedTime(PRInt64 *aLastModTime)
+{
+    CHECK_mPath();
+    NS_ENSURE_ARG(aLastModTime);
+
+    PRFileInfo64 info;
+    if (PR_GetFileInfo64(mPath.get(), &info) != PR_SUCCESS)
+        return NSRESULT_FOR_ERRNO();
+
+    // PRTime is a 64 bit value
+    // microseconds -> milliseconds
+    PRInt64 usecPerMsec;
+    LL_I2L(usecPerMsec, PR_USEC_PER_MSEC);
+    LL_DIV(*aLastModTime, info.modifyTime, usecPerMsec);
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::SetLastModifiedTime(PRInt64 aLastModTime)
+{
+    CHECK_mPath();
+
+    int result;
+    if (! LL_IS_ZERO(aLastModTime)) {
+        VALIDATE_STAT_CACHE();
+        struct utimbuf ut;
+        ut.actime = mCachedStat.st_atime;
+
+        // convert milliseconds to seconds since the unix epoch
+        double dTime;
+        LL_L2D(dTime, aLastModTime);
+        ut.modtime = (time_t) (dTime / PR_MSEC_PER_SEC);
+        result = utime(mPath.get(), &ut);
+    } else {
+        result = utime(mPath.get(), nsnull);
+    }
+    InvalidateCache();
+    return NSRESULT_FOR_RETURN(result);
+}
+
+NS_IMETHODIMP
+nsLocalFile::GetLastModifiedTimeOfLink(PRInt64 *aLastModTimeOfLink)
+{
+    CHECK_mPath();
+    NS_ENSURE_ARG(aLastModTimeOfLink);
+
+    struct stat sbuf;
+    if (lstat(mPath.get(), &sbuf) == -1)
+        return NSRESULT_FOR_ERRNO();
+    LL_I2L(*aLastModTimeOfLink, (PRInt32)sbuf.st_mtime);
+
+    // lstat returns st_mtime in seconds
+    PRInt64 msecPerSec;
+    LL_I2L(msecPerSec, PR_MSEC_PER_SEC);
+    LL_MUL(*aLastModTimeOfLink, *aLastModTimeOfLink, msecPerSec);
+
+    return NS_OK;
+}
+
+/*
+ * utime(2) may or may not dereference symlinks, joy.
+ */
+NS_IMETHODIMP
+nsLocalFile::SetLastModifiedTimeOfLink(PRInt64 aLastModTimeOfLink)
+{
+    return SetLastModifiedTime(aLastModTimeOfLink);
+}
+
+/*
+ * Only send back permissions bits: maybe we want to send back the whole
+ * mode_t to permit checks against other file types?
+ */
+
+#define NORMALIZE_PERMS(mode)    ((mode)& (S_IRWXU | S_IRWXG | S_IRWXO))
+
+NS_IMETHODIMP
+nsLocalFile::GetPermissions(PRUint32 *aPermissions)
+{
+    NS_ENSURE_ARG(aPermissions);
+    VALIDATE_STAT_CACHE();
+    *aPermissions = NORMALIZE_PERMS(mCachedStat.st_mode);
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::GetPermissionsOfLink(PRUint32 *aPermissionsOfLink)
+{
+    CHECK_mPath();
+    NS_ENSURE_ARG(aPermissionsOfLink);
+
+    struct stat sbuf;
+    if (lstat(mPath.get(), &sbuf) == -1)
+        return NSRESULT_FOR_ERRNO();
+    *aPermissionsOfLink = NORMALIZE_PERMS(sbuf.st_mode);
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::SetPermissions(PRUint32 aPermissions)
+{
+    CHECK_mPath();
+
+    InvalidateCache();
+
+    /*
+     * Race condition here: we should use fchmod instead, there's no way to 
+     * guarantee the name still refers to the same file.
+     */
+    if (chmod(mPath.get(), aPermissions) < 0)
+        return NSRESULT_FOR_ERRNO();
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::SetPermissionsOfLink(PRUint32 aPermissions)
+{
+    return SetPermissions(aPermissions);
+}
+
+NS_IMETHODIMP
+nsLocalFile::GetFileSize(PRInt64 *aFileSize)
+{
+    NS_ENSURE_ARG_POINTER(aFileSize);
+    *aFileSize = LL_ZERO;
+    VALIDATE_STAT_CACHE();
+
+#if defined(VMS)
+    /* Only two record formats can report correct file content size */
+    if ((mCachedStat.st_fab_rfm != FAB$C_STMLF) &&
+        (mCachedStat.st_fab_rfm != FAB$C_STMCR)) {
+        return NS_ERROR_FAILURE;
+    }
+#endif
+
+    /* XXX autoconf for and use stat64 if available */
+    if (!S_ISDIR(mCachedStat.st_mode)) {
+        LL_UI2L(*aFileSize, (PRUint32)mCachedStat.st_size);
+    }
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::SetFileSize(PRInt64 aFileSize)
+{
+    CHECK_mPath();
+
+    PRInt32 size;
+    LL_L2I(size, aFileSize);
+    /* XXX truncate64? */
+    InvalidateCache();
+    if (truncate(mPath.get(), (off_t)size) == -1)
+        return NSRESULT_FOR_ERRNO();
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::GetFileSizeOfLink(PRInt64 *aFileSize)
+{
+    CHECK_mPath();
+    NS_ENSURE_ARG(aFileSize);
+
+    struct stat sbuf;
+    if (lstat(mPath.get(), &sbuf) == -1)
+        return NSRESULT_FOR_ERRNO();
+    /* XXX autoconf for and use lstat64 if available */
+    LL_UI2L(*aFileSize, (PRUint32)sbuf.st_size);
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::GetDiskSpaceAvailable(PRInt64 *aDiskSpaceAvailable)
+{
+    NS_ENSURE_ARG_POINTER(aDiskSpaceAvailable);
+
+    // These systems have the operations necessary to check disk space.
+
+#if defined(HAVE_SYS_STATFS_H) || defined(HAVE_SYS_STATVFS_H)
+
+    // check to make sure that mPath is properly initialized
+    CHECK_mPath();
+
+    struct STATFS fs_buf;
+
+    /* 
+     * Members of the STATFS struct that you should know about:
+     * f_bsize = block size on disk.
+     * f_bavail = number of free blocks available to a non-superuser.
+     * f_bfree = number of total free blocks in file system.
+     */
+
+    if (STATFS(mPath.get(), &fs_buf) < 0) {
+        // The call to STATFS failed.
+#ifdef DEBUG
+        printf("ERROR: GetDiskSpaceAvailable: STATFS call FAILED. \n");
+#endif
+        return NS_ERROR_FAILURE;
+    }
+#ifdef DEBUG_DISK_SPACE
+    printf("DiskSpaceAvailable: %d bytes\n",
+         fs_buf.f_bsize * (fs_buf.f_bavail - 1));
+#endif
+
+    /* 
+     * The number of bytes free == The number of free blocks available to
+     * a non-superuser, minus one as a fudge factor, multiplied by the size
+     * of the aforementioned blocks.
+     */
+    PRInt64 bsize, bavail;
+
+    LL_I2L(bsize, fs_buf.f_bsize);
+    LL_I2L(bavail, fs_buf.f_bavail - 1);
+    LL_MUL(*aDiskSpaceAvailable, bsize, bavail);
+    return NS_OK;
+
+#else
+    /*
+     * This platform doesn't have statfs or statvfs.  I'm sure that there's
+     * a way to check for free disk space on platforms that don't have statfs
+     * (I'm SURE they have df, for example).
+     *
+     * Until we figure out how to do that, lets be honest and say that this
+     * command isn't implemented properly for these platforms yet.
+     */
+#ifdef DEBUG
+    printf("ERROR: GetDiskSpaceAvailable: Not implemented for plaforms without statfs.\n");
+#endif
+    return NS_ERROR_NOT_IMPLEMENTED;
+
+#endif /* HAVE_SYS_STATFS_H or HAVE_SYS_STATVFS_H */
+
+}
+
+NS_IMETHODIMP
+nsLocalFile::GetParent(nsIFile **aParent)
+{
+    CHECK_mPath();
+    NS_ENSURE_ARG_POINTER(aParent);
+    *aParent       = nsnull;
+
+    // if '/' we are at the top of the volume, return null
+    if (mPath.Equals("/"))
+        return  NS_OK;
+ 
+    // <brendan, after jband> I promise to play nice
+    char *buffer   = mPath.BeginWriting(),
+         *slashp   = buffer;
+
+    // find the last significant slash in buffer
+    slashp = strrchr(buffer, '/');
+    NS_ASSERTION(slashp, "non-canonical mPath?");
+    if (!slashp)
+        return NS_ERROR_FILE_INVALID_PATH;
+
+    // for the case where we are at '/'
+    if (slashp == buffer)
+        slashp++;
+
+    // temporarily terminate buffer at the last significant slash
+    char c = *slashp;
+    *slashp = '\0';
+
+    nsCOMPtr<nsILocalFile> localFile;
+    nsresult rv = NS_NewNativeLocalFile(nsDependentCString(buffer), PR_TRUE,
+                                        getter_AddRefs(localFile));
+
+    // make buffer whole again
+    *slashp = c;
+
+    if (NS_SUCCEEDED(rv) && localFile)
+        rv = CallQueryInterface(localFile, aParent);
+    return rv;
+}
+
+/*
+ * The results of Exists, isWritable and isReadable are not cached.
+ */
+
+NS_IMETHODIMP
+nsLocalFile::Exists(PRBool *_retval)
+{
+    CHECK_mPath();
+    NS_ENSURE_ARG_POINTER(_retval);
+
+    *_retval = (access(mPath.get(), F_OK) == 0);
+    return NS_OK;
+}
+
+#ifdef XP_BEOS
+// access() is buggy in BeOS POSIX implementation, at least for BFS, using stat() instead
+NS_IMETHODIMP
+nsLocalFile::IsWritable(PRBool *_retval)
+{
+    CHECK_mPath();
+    NS_ENSURE_ARG_POINTER(_retval);
+    struct stat buf;
+    *_retval = (stat(mPath.get(), &buf) == 0);
+    *_retval = *_retval && (buf.st_mode & (S_IWUSR | S_IWGRP | S_IWOTH ));
+    if (*_retval || errno == EACCES)
+        return NS_OK;
+    return NSRESULT_FOR_ERRNO();
+}
+
+NS_IMETHODIMP
+nsLocalFile::IsReadable(PRBool *_retval)
+{
+    CHECK_mPath();
+    NS_ENSURE_ARG_POINTER(_retval);
+    struct stat buf;
+    *_retval = (stat(mPath.get(), &buf) == 0);
+    *_retval = *_retval && (buf.st_mode & (S_IRUSR | S_IRGRP | S_IROTH ));
+    if (*_retval || errno == EACCES)
+        return NS_OK;
+    return NSRESULT_FOR_ERRNO();
+}
+
+NS_IMETHODIMP
+nsLocalFile::IsExecutable(PRBool *_retval)
+{
+    CHECK_mPath();
+    NS_ENSURE_ARG_POINTER(_retval);
+    struct stat buf;
+    *_retval = (stat(mPath.get(), &buf) == 0);
+    *_retval = *_retval && (buf.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH ));
+    if (*_retval || errno == EACCES)
+        return NS_OK;
+    return NSRESULT_FOR_ERRNO();
+}
+#else
+NS_IMETHODIMP
+nsLocalFile::IsWritable(PRBool *_retval)
+{
+    CHECK_mPath();
+    NS_ENSURE_ARG_POINTER(_retval);
+
+    *_retval = (access(mPath.get(), W_OK) == 0);
+    if (*_retval || errno == EACCES)
+        return NS_OK;
+    return NSRESULT_FOR_ERRNO();
+}
+
+NS_IMETHODIMP
+nsLocalFile::IsReadable(PRBool *_retval)
+{
+    CHECK_mPath();
+    NS_ENSURE_ARG_POINTER(_retval);
+
+    *_retval = (access(mPath.get(), R_OK) == 0);
+    if (*_retval || errno == EACCES)
+        return NS_OK;
+    return NSRESULT_FOR_ERRNO();
+}
+
+NS_IMETHODIMP
+nsLocalFile::IsExecutable(PRBool *_retval)
+{
+    CHECK_mPath();
+    NS_ENSURE_ARG_POINTER(_retval);
+
+    *_retval = (access(mPath.get(), X_OK) == 0);
+    if (*_retval || errno == EACCES)
+        return NS_OK;
+    return NSRESULT_FOR_ERRNO();
+}
+#endif
+NS_IMETHODIMP
+nsLocalFile::IsDirectory(PRBool *_retval)
+{
+    NS_ENSURE_ARG_POINTER(_retval);
+    *_retval = PR_FALSE;
+    VALIDATE_STAT_CACHE();
+    *_retval = S_ISDIR(mCachedStat.st_mode);
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::IsFile(PRBool *_retval)
+{
+    NS_ENSURE_ARG_POINTER(_retval);
+    *_retval = PR_FALSE;
+    VALIDATE_STAT_CACHE();
+    *_retval = S_ISREG(mCachedStat.st_mode);
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::IsHidden(PRBool *_retval)
+{
+    NS_ENSURE_ARG_POINTER(_retval);
+    nsACString::const_iterator begin, end;
+    LocateNativeLeafName(begin, end);
+    *_retval = (*begin == '.');
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::IsSymlink(PRBool *_retval)
+{
+    NS_ENSURE_ARG_POINTER(_retval);
+    CHECK_mPath();
+
+    struct stat symStat;
+    lstat(mPath.get(), &symStat);
+    *_retval=S_ISLNK(symStat.st_mode);
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::IsSpecial(PRBool *_retval)
+{
+    NS_ENSURE_ARG_POINTER(_retval);
+    VALIDATE_STAT_CACHE();
+    *_retval = S_ISCHR(mCachedStat.st_mode)      ||
+                 S_ISBLK(mCachedStat.st_mode)    ||
+#ifdef S_ISSOCK
+                 S_ISSOCK(mCachedStat.st_mode)   ||
+#endif
+                 S_ISFIFO(mCachedStat.st_mode);
+
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::Equals(nsIFile *inFile, PRBool *_retval)
+{
+    NS_ENSURE_ARG(inFile);
+    NS_ENSURE_ARG_POINTER(_retval);
+    *_retval = PR_FALSE;
+
+    nsresult rv;
+    nsCAutoString inPath;
+
+    if (NS_FAILED(rv = inFile->GetNativePath(inPath)))
+        return rv;
+
+    *_retval = !FILE_STRCMP(inPath.get(), mPath.get());
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::Contains(nsIFile *inFile, PRBool recur, PRBool *_retval)
+{
+    CHECK_mPath();
+    NS_ENSURE_ARG(inFile);
+    NS_ENSURE_ARG_POINTER(_retval);
+
+    nsCAutoString inPath;
+    nsresult rv;
+
+    if (NS_FAILED(rv = inFile->GetNativePath(inPath)))
+        return rv;
+
+    *_retval = PR_FALSE;
+
+    ssize_t len = mPath.Length();
+    if (FILE_STRNCMP(mPath.get(), inPath.get(), len) == 0) {
+        // Now make sure that the |inFile|'s path has a separator at len,
+        // which implies that it has more components after len.
+        if (inPath[len] == '/')
+            *_retval = PR_TRUE;
+    }
+
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::GetNativeTarget(nsACString &_retval)
+{
+    CHECK_mPath();
+    _retval.Truncate();
+
+    struct stat symStat;
+    lstat(mPath.get(), &symStat);
+    if (!S_ISLNK(symStat.st_mode))
+        return NS_ERROR_FILE_INVALID_PATH;
+
+    PRInt64 targetSize64;
+    if (NS_FAILED(GetFileSizeOfLink(&targetSize64)))
+        return NS_ERROR_FAILURE;
+
+    PRInt32 size;
+    LL_L2I(size, targetSize64);
+    char *target = (char *)nsMemory::Alloc(size + 1);
+    if (!target)
+        return NS_ERROR_OUT_OF_MEMORY;
+
+    if (readlink(mPath.get(), target, (size_t)size) < 0) {
+        nsMemory::Free(target);
+        return NSRESULT_FOR_ERRNO();
+    }
+    target[size] = '\0';
+
+    nsresult rv;
+    PRBool isSymlink;
+    nsCOMPtr<nsIFile> self(this);
+    nsCOMPtr<nsIFile> parent;
+    while (NS_SUCCEEDED(rv = self->GetParent(getter_AddRefs(parent)))) {
+        NS_ASSERTION(parent != nsnull, "no parent?!");
+
+        if (target[0] != '/') {
+            nsCOMPtr<nsILocalFile> localFile(do_QueryInterface(parent, &rv));
+            if (NS_FAILED(rv))
+                break;
+            if (NS_FAILED(rv = localFile->AppendRelativeNativePath(nsDependentCString(target))))
+                break;
+            if (NS_FAILED(rv = localFile->GetNativePath(_retval)))
+                break;
+            if (NS_FAILED(rv = parent->IsSymlink(&isSymlink)))
+                break;
+            self = parent;
+        } else {
+            nsCOMPtr<nsILocalFile> localFile;
+            rv = NS_NewNativeLocalFile(nsDependentCString(target), PR_TRUE,
+                                       getter_AddRefs(localFile));
+            if (NS_FAILED(rv))
+                break;
+            if (NS_FAILED(rv = localFile->IsSymlink(&isSymlink)))
+                break;
+            _retval = target; // XXX can we avoid this buffer copy?
+            self = do_QueryInterface(localFile);
+        }
+        if (NS_FAILED(rv) || !isSymlink)
+            break;
+
+        const nsPromiseFlatCString &flatRetval = PromiseFlatCString(_retval);
+
+        // strip off any and all trailing '/'
+        PRInt32 len = strlen(target);
+        while (target[len-1] == '/' && len > 1)
+            target[--len] = '\0';
+        if (lstat(flatRetval.get(), &symStat) < 0) {
+            rv = NSRESULT_FOR_ERRNO();
+            break;
+        }
+        if (!S_ISLNK(symStat.st_mode)) {
+            rv = NS_ERROR_FILE_INVALID_PATH;
+            break;
+        }
+        size = symStat.st_size;
+        if (readlink(flatRetval.get(), target, size) < 0) {
+            rv = NSRESULT_FOR_ERRNO();
+            break;
+        }
+        target[size] = '\0';
+
+        _retval.Truncate();
+    }
+
+    nsMemory::Free(target);
+
+    if (NS_FAILED(rv))
+        _retval.Truncate();
+    return rv;
+}
+
+/* attribute PRBool followLinks; */
+NS_IMETHODIMP
+nsLocalFile::GetFollowLinks(PRBool *aFollowLinks)
+{
+    *aFollowLinks = PR_TRUE;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::SetFollowLinks(PRBool aFollowLinks)
+{
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::GetDirectoryEntries(nsISimpleEnumerator **entries)
+{
+    nsDirEnumeratorUnix *dir = new nsDirEnumeratorUnix();
+    if (!dir)
+        return NS_ERROR_OUT_OF_MEMORY;
+
+    NS_ADDREF(dir);
+    nsresult rv = dir->Init(this, PR_FALSE);
+    if (NS_FAILED(rv)) {
+        *entries = nsnull;
+        NS_RELEASE(dir);
+    } else {
+        *entries = dir; // transfer reference
+    }
+
+    return rv;
+}
+
+NS_IMETHODIMP
+nsLocalFile::Load(PRLibrary **_retval)
+{
+    CHECK_mPath();
+    NS_ENSURE_ARG_POINTER(_retval);
+
+    NS_TIMELINE_START_TIMER("PR_LoadLibrary");
+
+    *_retval = PR_LoadLibrary(mPath.get());
+
+    NS_TIMELINE_STOP_TIMER("PR_LoadLibrary");
+    NS_TIMELINE_MARK_TIMER1("PR_LoadLibrary", mPath.get());
+
+    if (!*_retval)
+        return NS_ERROR_FAILURE;
+    return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::GetPersistentDescriptor(nsACString &aPersistentDescriptor)
+{
+    return GetNativePath(aPersistentDescriptor);
+}
+
+NS_IMETHODIMP
+nsLocalFile::SetPersistentDescriptor(const nsACString &aPersistentDescriptor)
+{
+    return InitWithNativePath(aPersistentDescriptor);
+}
+
+#ifdef XP_BEOS
+NS_IMETHODIMP
+nsLocalFile::Reveal()
+{
+  BPath bPath(mPath.get());
+  bPath.GetParent(&bPath);
+  entry_ref ref;
+  get_ref_for_path(bPath.Path(),&ref);
+  BMessage message(B_REFS_RECEIVED);
+  message.AddRef("refs",&ref);
+  BMessenger messenger("application/x-vnd.Be-TRAK");
+  messenger.SendMessage(&message);
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsLocalFile::Launch()
+{
+  entry_ref ref;
+  get_ref_for_path (mPath.get(), &ref);
+  be_roster->Launch (&ref);
+
+  return NS_OK;
+}
+#else
+NS_IMETHODIMP
+nsLocalFile::Reveal()
+{
+    return NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsLocalFile::Launch()
+{
+    return NS_ERROR_FAILURE;
+}
+#endif
+
+nsresult
+NS_NewNativeLocalFile(const nsACString &path, PRBool followSymlinks, nsILocalFile **result)
+{
+    nsLocalFile *file = new nsLocalFile();
+    if (!file)
+        return NS_ERROR_OUT_OF_MEMORY;
+    NS_ADDREF(file);
+
+    if (!path.IsEmpty()) {
+        nsresult rv = file->InitWithNativePath(path);
+        if (NS_FAILED(rv)) {
+            NS_RELEASE(file);
+            return rv;
+        }
+    }
+    *result = file;
+    return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// unicode support
+//-----------------------------------------------------------------------------
+
+#define SET_UCS(func, ucsArg) \
+    { \
+        nsCAutoString buf; \
+        nsresult rv = NS_CopyUnicodeToNative(ucsArg, buf); \
+        if (NS_FAILED(rv)) \
+            return rv; \
+        return (func)(buf); \
+    }
+
+#define GET_UCS(func, ucsArg) \
+    { \
+        nsCAutoString buf; \
+        nsresult rv = (func)(buf); \
+        if (NS_FAILED(rv)) return rv; \
+        return NS_CopyNativeToUnicode(buf, ucsArg); \
+    }
+
+#define SET_UCS_2ARGS_2(func, opaqueArg, ucsArg) \
+    { \
+        nsCAutoString buf; \
+        nsresult rv = NS_CopyUnicodeToNative(ucsArg, buf); \
+        if (NS_FAILED(rv)) \
+            return rv; \
+        return (func)(opaqueArg, buf); \
+    }
+
+// Unicode interface Wrapper
+nsresult  
+nsLocalFile::InitWithPath(const nsAString &filePath)
+{
+    SET_UCS(InitWithNativePath, filePath);
+}
+nsresult  
+nsLocalFile::Append(const nsAString &node)
+{
+    SET_UCS(AppendNative, node);
+}
+nsresult  
+nsLocalFile::AppendRelativePath(const nsAString &node)
+{
+    SET_UCS(AppendRelativeNativePath, node);
+}
+nsresult  
+nsLocalFile::GetLeafName(nsAString &aLeafName)
+{
+    GET_UCS(GetNativeLeafName, aLeafName);
+}
+nsresult  
+nsLocalFile::SetLeafName(const nsAString &aLeafName)
+{
+    SET_UCS(SetNativeLeafName, aLeafName);
+}
+nsresult  
+nsLocalFile::GetPath(nsAString &_retval)
+{
+    return NS_CopyNativeToUnicode(mPath, _retval);
+}
+nsresult  
+nsLocalFile::CopyTo(nsIFile *newParentDir, const nsAString &newName)
+{
+    SET_UCS_2ARGS_2(CopyToNative , newParentDir, newName);
+}
+nsresult  
+nsLocalFile::CopyToFollowingLinks(nsIFile *newParentDir, const nsAString &newName)
+{
+    SET_UCS_2ARGS_2(CopyToFollowingLinksNative , newParentDir, newName);
+}
+nsresult  
+nsLocalFile::MoveTo(nsIFile *newParentDir, const nsAString &newName)
+{
+    SET_UCS_2ARGS_2(MoveToNative, newParentDir, newName);
+}
+nsresult
+nsLocalFile::GetTarget(nsAString &_retval)
+{   
+    GET_UCS(GetNativeTarget, _retval);
+}
+nsresult 
+NS_NewLocalFile(const nsAString &path, PRBool followLinks, nsILocalFile* *result)
+{
+    nsCAutoString buf;
+    nsresult rv = NS_CopyUnicodeToNative(path, buf);
+    if (NS_FAILED(rv))
+        return rv;
+    return NS_NewNativeLocalFile(buf, followLinks, result);
+}
+
+//-----------------------------------------------------------------------------
+// global init/shutdown
+//-----------------------------------------------------------------------------
+
+void
+nsLocalFile::GlobalInit()
+{
+}
+
+void
+nsLocalFile::GlobalShutdown()
+{
+}