mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-10 11:54:40 +00:00
667 lines
16 KiB
C++
667 lines
16 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*****************************************************************************
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*
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* nsProcess is used to execute new processes and specify if you want to
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* wait (blocking) or continue (non-blocking).
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*
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*****************************************************************************
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*/
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#include "mozilla/ArrayUtils.h"
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#include "nsCOMPtr.h"
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#include "nsAutoPtr.h"
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#include "nsMemory.h"
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#include "nsProcess.h"
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#include "prio.h"
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#include "prenv.h"
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#include "nsCRT.h"
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#include "nsThreadUtils.h"
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#include "nsIObserverService.h"
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#include "mozilla/Services.h"
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#include <stdlib.h>
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#if defined(PROCESSMODEL_WINAPI)
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#include "prmem.h"
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#include "nsString.h"
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#include "nsLiteralString.h"
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#include "nsReadableUtils.h"
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#else
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#if(0) // def XP_MACOSX // we don't have spawn.h on 10.4.
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#include <crt_externs.h>
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#include <spawn.h>
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#include <sys/wait.h>
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#include <sys/errno.h>
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#endif
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#include <sys/types.h>
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#include <signal.h>
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#endif
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using namespace mozilla;
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#ifdef XP_MACOSX
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typedef int cpu_type_t; // we don't have cpu_type* on 10.4.
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#define CPU_TYPE_ANY ((cpu_type_t) -1)
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#define CPU_TYPE_X86 ((cpu_type_t) 7)
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#define CPU_TYPE_POWERPC ((cpu_type_t) 18)
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cpu_type_t pref_cpu_types[2] = {
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#if defined(__i386__)
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CPU_TYPE_X86,
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#elif defined(__x86_64__)
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CPU_TYPE_X86_64,
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#elif defined(__ppc__)
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CPU_TYPE_POWERPC,
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#endif
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CPU_TYPE_ANY
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};
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#endif
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//-------------------------------------------------------------------//
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// nsIProcess implementation
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//-------------------------------------------------------------------//
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NS_IMPL_ISUPPORTS(nsProcess, nsIProcess,
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nsIObserver)
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//Constructor
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nsProcess::nsProcess()
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: mThread(nullptr)
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, mLock("nsProcess.mLock")
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, mShutdown(false)
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, mBlocking(false)
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, mPid(-1)
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, mObserver(nullptr)
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, mWeakObserver(nullptr)
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, mExitValue(-1)
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#if 1 // !defined(XP_MACOSX) // we need this for 10.4.
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, mProcess(nullptr)
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#endif
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{
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}
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//Destructor
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nsProcess::~nsProcess()
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{
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}
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NS_IMETHODIMP
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nsProcess::Init(nsIFile* aExecutable)
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{
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if (mExecutable) {
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return NS_ERROR_ALREADY_INITIALIZED;
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}
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if (NS_WARN_IF(!aExecutable)) {
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return NS_ERROR_INVALID_ARG;
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}
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bool isFile;
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//First make sure the file exists
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nsresult rv = aExecutable->IsFile(&isFile);
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if (NS_FAILED(rv)) {
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return rv;
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}
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if (!isFile) {
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return NS_ERROR_FAILURE;
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}
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//Store the nsIFile in mExecutable
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mExecutable = aExecutable;
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//Get the path because it is needed by the NSPR process creation
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#ifdef XP_WIN
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rv = mExecutable->GetTarget(mTargetPath);
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if (NS_FAILED(rv) || mTargetPath.IsEmpty())
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#endif
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rv = mExecutable->GetPath(mTargetPath);
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return rv;
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}
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#if defined(XP_WIN)
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// Out param `aWideCmdLine` must be PR_Freed by the caller.
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static int
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assembleCmdLine(char* const* aArgv, wchar_t** aWideCmdLine, UINT aCodePage)
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{
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char* const* arg;
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char* p;
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char* q;
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char* cmdLine;
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int cmdLineSize;
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int numBackslashes;
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int i;
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int argNeedQuotes;
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/*
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* Find out how large the command line buffer should be.
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*/
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cmdLineSize = 0;
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for (arg = aArgv; *arg; ++arg) {
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/*
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* \ and " need to be escaped by a \. In the worst case,
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* every character is a \ or ", so the string of length
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* may double. If we quote an argument, that needs two ".
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* Finally, we need a space between arguments, and
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* a null byte at the end of command line.
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*/
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cmdLineSize += 2 * strlen(*arg) /* \ and " need to be escaped */
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+ 2 /* we quote every argument */
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+ 1; /* space in between, or final null */
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}
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p = cmdLine = (char*)PR_MALLOC(cmdLineSize * sizeof(char));
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if (!p) {
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return -1;
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}
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for (arg = aArgv; *arg; ++arg) {
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/* Add a space to separates the arguments */
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if (arg != aArgv) {
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*p++ = ' ';
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}
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q = *arg;
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numBackslashes = 0;
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argNeedQuotes = 0;
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/* If the argument contains white space, it needs to be quoted. */
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if (strpbrk(*arg, " \f\n\r\t\v")) {
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argNeedQuotes = 1;
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}
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if (argNeedQuotes) {
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*p++ = '"';
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}
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while (*q) {
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if (*q == '\\') {
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numBackslashes++;
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q++;
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} else if (*q == '"') {
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if (numBackslashes) {
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/*
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* Double the backslashes since they are followed
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* by a quote
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*/
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for (i = 0; i < 2 * numBackslashes; i++) {
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*p++ = '\\';
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}
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numBackslashes = 0;
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}
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/* To escape the quote */
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*p++ = '\\';
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*p++ = *q++;
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} else {
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if (numBackslashes) {
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/*
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* Backslashes are not followed by a quote, so
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* don't need to double the backslashes.
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*/
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for (i = 0; i < numBackslashes; i++) {
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*p++ = '\\';
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}
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numBackslashes = 0;
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}
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*p++ = *q++;
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}
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}
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/* Now we are at the end of this argument */
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if (numBackslashes) {
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/*
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* Double the backslashes if we have a quote string
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* delimiter at the end.
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*/
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if (argNeedQuotes) {
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numBackslashes *= 2;
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}
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for (i = 0; i < numBackslashes; i++) {
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*p++ = '\\';
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}
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}
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if (argNeedQuotes) {
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*p++ = '"';
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}
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}
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*p = '\0';
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int32_t numChars = MultiByteToWideChar(aCodePage, 0, cmdLine, -1, nullptr, 0);
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*aWideCmdLine = (wchar_t*)PR_MALLOC(numChars * sizeof(wchar_t));
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MultiByteToWideChar(aCodePage, 0, cmdLine, -1, *aWideCmdLine, numChars);
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PR_Free(cmdLine);
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return 0;
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}
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#endif
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void
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nsProcess::Monitor(void* aArg)
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{
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RefPtr<nsProcess> process = dont_AddRef(static_cast<nsProcess*>(aArg));
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if (!process->mBlocking) {
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PR_SetCurrentThreadName("RunProcess");
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}
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#if defined(PROCESSMODEL_WINAPI)
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DWORD dwRetVal;
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unsigned long exitCode = -1;
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dwRetVal = WaitForSingleObject(process->mProcess, INFINITE);
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if (dwRetVal != WAIT_FAILED) {
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if (GetExitCodeProcess(process->mProcess, &exitCode) == FALSE) {
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exitCode = -1;
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}
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}
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// Lock in case Kill or GetExitCode are called during this
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{
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MutexAutoLock lock(process->mLock);
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CloseHandle(process->mProcess);
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process->mProcess = nullptr;
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process->mExitValue = exitCode;
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if (process->mShutdown) {
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return;
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}
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}
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#else
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#if (0) // def XP_MACOSX // 10.4
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int exitCode = -1;
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int status = 0;
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pid_t result;
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do {
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result = waitpid(process->mPid, &status, 0);
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} while (result == -1 && errno == EINTR);
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if (result == process->mPid) {
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if (WIFEXITED(status)) {
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exitCode = WEXITSTATUS(status);
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} else if (WIFSIGNALED(status)) {
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exitCode = 256; // match NSPR's signal exit status
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}
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}
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#else
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int32_t exitCode = -1;
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if (PR_WaitProcess(process->mProcess, &exitCode) != PR_SUCCESS) {
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exitCode = -1;
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}
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#endif
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// Lock in case Kill or GetExitCode are called during this
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{
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MutexAutoLock lock(process->mLock);
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#if 1 // !defined(XP_MACOSX) // 10.4
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process->mProcess = nullptr;
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#endif
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process->mExitValue = exitCode;
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if (process->mShutdown) {
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return;
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}
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}
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#endif
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// If we ran a background thread for the monitor then notify on the main
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// thread
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if (NS_IsMainThread()) {
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process->ProcessComplete();
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} else {
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nsCOMPtr<nsIRunnable> event =
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NS_NewRunnableMethod(process, &nsProcess::ProcessComplete);
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NS_DispatchToMainThread(event);
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}
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}
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void
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nsProcess::ProcessComplete()
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{
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if (mThread) {
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nsCOMPtr<nsIObserverService> os =
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mozilla::services::GetObserverService();
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if (os) {
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os->RemoveObserver(this, "xpcom-shutdown");
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}
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PR_JoinThread(mThread);
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mThread = nullptr;
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}
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const char* topic;
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if (mExitValue < 0) {
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topic = "process-failed";
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} else {
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topic = "process-finished";
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}
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mPid = -1;
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nsCOMPtr<nsIObserver> observer;
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if (mWeakObserver) {
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observer = do_QueryReferent(mWeakObserver);
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} else if (mObserver) {
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observer = mObserver;
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}
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mObserver = nullptr;
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mWeakObserver = nullptr;
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if (observer) {
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observer->Observe(NS_ISUPPORTS_CAST(nsIProcess*, this), topic, nullptr);
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}
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}
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// XXXldb |aArgs| has the wrong const-ness
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NS_IMETHODIMP
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nsProcess::Run(bool aBlocking, const char** aArgs, uint32_t aCount)
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{
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return CopyArgsAndRunProcess(aBlocking, aArgs, aCount, nullptr, false);
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}
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// XXXldb |aArgs| has the wrong const-ness
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NS_IMETHODIMP
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nsProcess::RunAsync(const char** aArgs, uint32_t aCount,
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nsIObserver* aObserver, bool aHoldWeak)
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{
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return CopyArgsAndRunProcess(false, aArgs, aCount, aObserver, aHoldWeak);
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}
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nsresult
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nsProcess::CopyArgsAndRunProcess(bool aBlocking, const char** aArgs,
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uint32_t aCount, nsIObserver* aObserver,
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bool aHoldWeak)
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{
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// Add one to the aCount for the program name and one for null termination.
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char** my_argv = nullptr;
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my_argv = (char**)moz_xmalloc(sizeof(char*) * (aCount + 2));
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if (!my_argv) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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my_argv[0] = ToNewUTF8String(mTargetPath);
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for (uint32_t i = 0; i < aCount; ++i) {
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my_argv[i + 1] = const_cast<char*>(aArgs[i]);
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}
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my_argv[aCount + 1] = nullptr;
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nsresult rv = RunProcess(aBlocking, my_argv, aObserver, aHoldWeak, false);
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free(my_argv[0]);
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free(my_argv);
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return rv;
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}
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// XXXldb |aArgs| has the wrong const-ness
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NS_IMETHODIMP
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nsProcess::Runw(bool aBlocking, const char16_t** aArgs, uint32_t aCount)
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{
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return CopyArgsAndRunProcessw(aBlocking, aArgs, aCount, nullptr, false);
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}
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// XXXldb |aArgs| has the wrong const-ness
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NS_IMETHODIMP
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nsProcess::RunwAsync(const char16_t** aArgs, uint32_t aCount,
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nsIObserver* aObserver, bool aHoldWeak)
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{
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return CopyArgsAndRunProcessw(false, aArgs, aCount, aObserver, aHoldWeak);
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}
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nsresult
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nsProcess::CopyArgsAndRunProcessw(bool aBlocking, const char16_t** aArgs,
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uint32_t aCount, nsIObserver* aObserver,
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bool aHoldWeak)
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{
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// Add one to the aCount for the program name and one for null termination.
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char** my_argv = nullptr;
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my_argv = (char**)moz_xmalloc(sizeof(char*) * (aCount + 2));
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if (!my_argv) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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my_argv[0] = ToNewUTF8String(mTargetPath);
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for (uint32_t i = 0; i < aCount; i++) {
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my_argv[i + 1] = ToNewUTF8String(nsDependentString(aArgs[i]));
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}
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my_argv[aCount + 1] = nullptr;
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nsresult rv = RunProcess(aBlocking, my_argv, aObserver, aHoldWeak, true);
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for (uint32_t i = 0; i <= aCount; ++i) {
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free(my_argv[i]);
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}
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free(my_argv);
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return rv;
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}
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nsresult
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nsProcess::RunProcess(bool aBlocking, char** aMyArgv, nsIObserver* aObserver,
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bool aHoldWeak, bool aArgsUTF8)
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{
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if (NS_WARN_IF(!mExecutable)) {
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return NS_ERROR_NOT_INITIALIZED;
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}
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if (NS_WARN_IF(mThread)) {
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return NS_ERROR_ALREADY_INITIALIZED;
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}
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if (aObserver) {
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if (aHoldWeak) {
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mWeakObserver = do_GetWeakReference(aObserver);
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if (!mWeakObserver) {
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return NS_NOINTERFACE;
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}
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} else {
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mObserver = aObserver;
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}
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}
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mExitValue = -1;
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mPid = -1;
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#if defined(PROCESSMODEL_WINAPI)
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BOOL retVal;
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wchar_t* cmdLine = nullptr;
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// |aMyArgv| is null-terminated and always starts with the program path. If
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// the second slot is non-null then arguments are being passed.
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if (aMyArgv[1] && assembleCmdLine(aMyArgv + 1, &cmdLine,
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aArgsUTF8 ? CP_UTF8 : CP_ACP) == -1) {
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return NS_ERROR_FILE_EXECUTION_FAILED;
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}
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/* The SEE_MASK_NO_CONSOLE flag is important to prevent console windows
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* from appearing. This makes behavior the same on all platforms. The flag
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* will not have any effect on non-console applications.
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*/
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// The program name in aMyArgv[0] is always UTF-8
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NS_ConvertUTF8toUTF16 wideFile(aMyArgv[0]);
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SHELLEXECUTEINFOW sinfo;
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memset(&sinfo, 0, sizeof(SHELLEXECUTEINFOW));
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sinfo.cbSize = sizeof(SHELLEXECUTEINFOW);
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sinfo.hwnd = nullptr;
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sinfo.lpFile = wideFile.get();
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sinfo.nShow = SW_SHOWNORMAL;
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sinfo.fMask = SEE_MASK_FLAG_DDEWAIT |
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SEE_MASK_NO_CONSOLE |
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SEE_MASK_NOCLOSEPROCESS;
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if (cmdLine) {
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sinfo.lpParameters = cmdLine;
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}
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retVal = ShellExecuteExW(&sinfo);
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if (!retVal) {
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return NS_ERROR_FILE_EXECUTION_FAILED;
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}
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mProcess = sinfo.hProcess;
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if (cmdLine) {
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PR_Free(cmdLine);
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}
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mPid = GetProcessId(mProcess);
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#elif (0) // defined(XP_MACOSX) // we don't have spawn.h on 10.4.
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// Initialize spawn attributes.
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posix_spawnattr_t spawnattr;
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if (posix_spawnattr_init(&spawnattr) != 0) {
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return NS_ERROR_FAILURE;
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}
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// Set spawn attributes.
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size_t attr_count = ArrayLength(pref_cpu_types);
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size_t attr_ocount = 0;
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if (posix_spawnattr_setbinpref_np(&spawnattr, attr_count, pref_cpu_types,
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&attr_ocount) != 0 ||
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attr_ocount != attr_count) {
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posix_spawnattr_destroy(&spawnattr);
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return NS_ERROR_FAILURE;
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}
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// Note: |aMyArgv| is already null-terminated as required by posix_spawnp.
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pid_t newPid = 0;
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int result = posix_spawnp(&newPid, aMyArgv[0], nullptr, &spawnattr, aMyArgv,
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*_NSGetEnviron());
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mPid = static_cast<int32_t>(newPid);
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posix_spawnattr_destroy(&spawnattr);
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if (result != 0) {
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return NS_ERROR_FAILURE;
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}
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#else
|
|
mProcess = PR_CreateProcess(aMyArgv[0], aMyArgv, nullptr, nullptr);
|
|
if (!mProcess) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
struct MYProcess
|
|
{
|
|
uint32_t pid;
|
|
};
|
|
MYProcess* ptrProc = (MYProcess*)mProcess;
|
|
mPid = ptrProc->pid;
|
|
#endif
|
|
|
|
NS_ADDREF_THIS();
|
|
mBlocking = aBlocking;
|
|
if (aBlocking) {
|
|
Monitor(this);
|
|
if (mExitValue < 0) {
|
|
return NS_ERROR_FILE_EXECUTION_FAILED;
|
|
}
|
|
} else {
|
|
mThread = PR_CreateThread(PR_SYSTEM_THREAD, Monitor, this,
|
|
PR_PRIORITY_NORMAL, PR_GLOBAL_THREAD,
|
|
PR_JOINABLE_THREAD, 0);
|
|
if (!mThread) {
|
|
NS_RELEASE_THIS();
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// It isn't a failure if we just can't watch for shutdown
|
|
nsCOMPtr<nsIObserverService> os =
|
|
mozilla::services::GetObserverService();
|
|
if (os) {
|
|
os->AddObserver(this, "xpcom-shutdown", false);
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsProcess::GetIsRunning(bool* aIsRunning)
|
|
{
|
|
if (mThread) {
|
|
*aIsRunning = true;
|
|
} else {
|
|
*aIsRunning = false;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsProcess::GetPid(uint32_t* aPid)
|
|
{
|
|
if (!mThread) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
if (mPid < 0) {
|
|
return NS_ERROR_NOT_IMPLEMENTED;
|
|
}
|
|
*aPid = mPid;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsProcess::Kill()
|
|
{
|
|
if (!mThread) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
{
|
|
MutexAutoLock lock(mLock);
|
|
#if defined(PROCESSMODEL_WINAPI)
|
|
if (TerminateProcess(mProcess, 0) == 0) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
#elif (0) // defined(XP_MACOSX) // 10.4
|
|
if (kill(mPid, SIGKILL) != 0) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
#else
|
|
if (!mProcess || (PR_KillProcess(mProcess) != PR_SUCCESS)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
// We must null out mThread if we want IsRunning to return false immediately
|
|
// after this call.
|
|
nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
|
|
if (os) {
|
|
os->RemoveObserver(this, "xpcom-shutdown");
|
|
}
|
|
PR_JoinThread(mThread);
|
|
mThread = nullptr;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsProcess::GetExitValue(int32_t* aExitValue)
|
|
{
|
|
MutexAutoLock lock(mLock);
|
|
|
|
*aExitValue = mExitValue;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsProcess::Observe(nsISupports* aSubject, const char* aTopic,
|
|
const char16_t* aData)
|
|
{
|
|
// Shutting down, drop all references
|
|
if (mThread) {
|
|
nsCOMPtr<nsIObserverService> os =
|
|
mozilla::services::GetObserverService();
|
|
if (os) {
|
|
os->RemoveObserver(this, "xpcom-shutdown");
|
|
}
|
|
mThread = nullptr;
|
|
}
|
|
|
|
mObserver = nullptr;
|
|
mWeakObserver = nullptr;
|
|
|
|
MutexAutoLock lock(mLock);
|
|
mShutdown = true;
|
|
|
|
return NS_OK;
|
|
}
|