mirror of
https://github.com/mozilla/gecko-dev.git
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334 lines
8.8 KiB
C++
334 lines
8.8 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla XULRunner bootstrap.
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*
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* The Initial Developer of the Original Code is
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* Benjamin Smedberg <benjamin@smedbergs.us>.
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*
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* Portions created by the Initial Developer are Copyright (C) 2005
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* the Mozilla Foundation. All Rights Reserved.
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*
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* Contributor(s):
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* Robert Strong <robert.bugzilla@gmail.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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// This file is not build directly. Instead, it is included in multiple
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// shared objects.
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#ifdef nsWindowsRestart_cpp
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#error "nsWindowsRestart.cpp is not a header file, and must only be included once."
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#else
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#define nsWindowsRestart_cpp
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#endif
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#include "nsUTF8Utils.h"
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#include <shellapi.h>
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#ifndef ERROR_ELEVATION_REQUIRED
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#define ERROR_ELEVATION_REQUIRED 740L
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#endif
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BOOL (WINAPI *pCreateProcessWithTokenW)(HANDLE,
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DWORD,
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LPCWSTR,
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LPWSTR,
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DWORD,
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LPVOID,
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LPCWSTR,
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LPSTARTUPINFOW,
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LPPROCESS_INFORMATION);
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BOOL (WINAPI *pIsUserAnAdmin)(VOID);
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/**
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* Get the length that the string will take and takes into account the
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* additional length if the string needs to be quoted and if characters need to
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* be escaped.
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*/
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static int ArgStrLen(const PRUnichar *s)
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{
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int backslashes = 0;
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int i = wcslen(s);
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BOOL hasDoubleQuote = wcschr(s, L'"') != NULL;
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// Only add doublequotes if the string contains a space or a tab
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BOOL addDoubleQuotes = wcspbrk(s, L" \t") != NULL;
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if (addDoubleQuotes) {
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i += 2; // initial and final duoblequote
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}
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if (hasDoubleQuote) {
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while (*s) {
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if (*s == '\\') {
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++backslashes;
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} else {
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if (*s == '"') {
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// Escape the doublequote and all backslashes preceding the doublequote
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i += backslashes + 1;
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}
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backslashes = 0;
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}
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++s;
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}
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}
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return i;
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}
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/**
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* Copy string "s" to string "d", quoting the argument as appropriate and
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* escaping doublequotes along with any backslashes that immediately precede
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* doublequotes.
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* The CRT parses this to retrieve the original argc/argv that we meant,
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* see STDARGV.C in the MSVC CRT sources.
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*
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* @return the end of the string
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*/
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static PRUnichar* ArgToString(PRUnichar *d, const PRUnichar *s)
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{
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int backslashes = 0;
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BOOL hasDoubleQuote = wcschr(s, L'"') != NULL;
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// Only add doublequotes if the string contains a space or a tab
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BOOL addDoubleQuotes = wcspbrk(s, L" \t") != NULL;
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if (addDoubleQuotes) {
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*d = '"'; // initial doublequote
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++d;
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}
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if (hasDoubleQuote) {
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int i;
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while (*s) {
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if (*s == '\\') {
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++backslashes;
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} else {
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if (*s == '"') {
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// Escape the doublequote and all backslashes preceding the doublequote
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for (i = 0; i <= backslashes; ++i) {
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*d = '\\';
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++d;
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}
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}
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backslashes = 0;
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}
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*d = *s;
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++d; ++s;
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}
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} else {
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wcscpy(d, s);
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d += wcslen(s);
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}
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if (addDoubleQuotes) {
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*d = '"'; // final doublequote
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++d;
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}
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return d;
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}
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/**
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* Creates a command line from a list of arguments. The returned
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* string is allocated with "malloc" and should be "free"d.
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*
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* argv is UTF8
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*/
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static PRUnichar*
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MakeCommandLine(int argc, PRUnichar **argv)
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{
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int i;
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int len = 0;
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// The + 1 of the last argument handles the allocation for null termination
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for (i = 0; i < argc; ++i)
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len += ArgStrLen(argv[i]) + 1;
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#ifdef WINCE
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wchar_t *env = mozce_GetEnvironmentCL();
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// XXX There's a buffer overrun here somewhere that causes a heap
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// check to fail in the final free of the results of this function
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// in WinLaunchChild. I can't honestly figure out where it is,
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// because I'm pretty sure with the + 1 above and the wcslen here,
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// we have enough room for a trailing NULL. But, adding a little
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// bit more slop (the +10) seems to fix the problem.
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//
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// Supposedly CreateProcessW can modify its arguments, so maybe it's
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// doing some scribbling?
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len += (wcslen(env)) + 10;
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#endif
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// Protect against callers that pass 0 arguments
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if (len == 0)
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len = 1;
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PRUnichar *s = (PRUnichar*) malloc(len * sizeof(PRUnichar));
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if (!s)
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return NULL;
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PRUnichar *c = s;
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for (i = 0; i < argc; ++i) {
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c = ArgToString(c, argv[i]);
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if (i + 1 != argc) {
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*c = ' ';
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++c;
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}
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}
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*c = '\0';
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#ifdef WINCE
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wcscat(s, env);
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if (env)
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free(env);
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#endif
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return s;
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}
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/**
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* Convert UTF8 to UTF16 without using the normal XPCOM goop, which we
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* can't link to updater.exe.
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*/
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static PRUnichar*
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AllocConvertUTF8toUTF16(const char *arg)
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{
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// UTF16 can't be longer in units than UTF8
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int len = strlen(arg);
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PRUnichar *s = new PRUnichar[(len + 1) * sizeof(PRUnichar)];
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if (!s)
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return NULL;
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ConvertUTF8toUTF16 convert(s);
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convert.write(arg, len);
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convert.write_terminator();
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return s;
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}
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static void
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FreeAllocStrings(int argc, PRUnichar **argv)
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{
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while (argc) {
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--argc;
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delete [] argv[argc];
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}
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delete [] argv;
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}
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/**
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* Launch a child process with the specified arguments.
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* @note argv[0] is ignored
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* @note The form of this function that takes char **argv expects UTF-8
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*/
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BOOL
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WinLaunchChild(const PRUnichar *exePath, int argc, PRUnichar **argv);
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BOOL
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WinLaunchChild(const PRUnichar *exePath, int argc, char **argv)
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{
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PRUnichar** argvConverted = new PRUnichar*[argc];
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if (!argvConverted)
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return FALSE;
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for (int i = 0; i < argc; ++i) {
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argvConverted[i] = AllocConvertUTF8toUTF16(argv[i]);
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if (!argvConverted[i]) {
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return FALSE;
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}
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}
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BOOL ok = WinLaunchChild(exePath, argc, argvConverted);
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FreeAllocStrings(argc, argvConverted);
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return ok;
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}
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BOOL
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WinLaunchChild(const PRUnichar *exePath, int argc, PRUnichar **argv)
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{
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PRUnichar *cl;
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BOOL ok;
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#ifdef WINCE
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// Windows Mobile Issue:
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// When passing both an image name and a command line to
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// CreateProcessW, you need to make sure that the image name
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// identially matches the first argument of the command line. If
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// they do not match, Windows Mobile will send two "argv[0]" values.
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// To avoid this problem, we will strip off the argv here, and
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// depend only on the exePath.
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argv = argv + 1;
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argc--;
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#endif
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cl = MakeCommandLine(argc, argv);
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if (!cl)
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return FALSE;
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STARTUPINFOW si = {sizeof(si), 0};
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PROCESS_INFORMATION pi = {0};
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ok = CreateProcessW(exePath,
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cl,
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NULL, // no special security attributes
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NULL, // no special thread attributes
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FALSE, // don't inherit filehandles
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0, // No special process creation flags
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NULL, // inherit my environment
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NULL, // use my current directory
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&si,
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&pi);
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if (ok) {
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CloseHandle(pi.hProcess);
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CloseHandle(pi.hThread);
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} else {
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LPVOID lpMsgBuf = NULL;
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FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
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FORMAT_MESSAGE_FROM_SYSTEM |
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FORMAT_MESSAGE_IGNORE_INSERTS,
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NULL,
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GetLastError(),
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MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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(LPTSTR) &lpMsgBuf,
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0,
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NULL
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);
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wprintf(L"Error restarting: %s\n", lpMsgBuf ? lpMsgBuf : L"(null)");
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if (lpMsgBuf)
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LocalFree(lpMsgBuf);
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}
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free(cl);
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return ok;
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}
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