mirror of
https://github.com/mozilla/gecko-dev.git
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360 lines
9.6 KiB
C++
360 lines
9.6 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Mozilla Communicator client code,
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* released March 31, 1998.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are
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* Copyright (C) 1998-1999 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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* Don Bragg <dbragg@netscape.com>
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*/
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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 "nsCOMPtr.h"
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#include "nsMemory.h"
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#include "nsProcess.h"
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#include "prtypes.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 <stdlib.h>
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#if defined( XP_WIN )
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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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#include <windows.h>
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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_ISUPPORTS1(nsProcess, nsIProcess)
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//Constructor
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nsProcess::nsProcess():mExitValue(-1),
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mProcess(nsnull)
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{
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NS_INIT_ISUPPORTS();
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}
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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* executable)
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{
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PRBool isFile;
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//First make sure the file exists
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nsresult rv = executable->IsFile(&isFile);
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if (NS_FAILED(rv)) return rv;
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if (!isFile)
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return NS_ERROR_FAILURE;
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//Store the nsIFile in mExecutable
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mExecutable = executable;
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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->GetNativeTarget(mTargetPath);
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if (NS_FAILED(rv) || mTargetPath.IsEmpty() )
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#endif
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rv = mExecutable->GetNativePath(mTargetPath);
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return rv;
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}
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#if defined( XP_WIN )
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static int assembleCmdLine(char *const *argv, char **cmdLine)
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{
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char *const *arg;
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char *p, *q;
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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 = argv; *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);
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if (p == NULL) {
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return -1;
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}
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for (arg = argv; *arg; arg++) {
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/* Add a space to separates the arguments */
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if (arg != argv) {
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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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return 0;
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}
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#endif
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NS_IMETHODIMP
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nsProcess::Run(PRBool blocking, const char **args, PRUint32 count, PRUint32 *pid)
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{
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nsresult rv = NS_OK;
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// make sure that when we allocate we have 1 greater than the
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// count since we need to null terminate the list for the argv to
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// pass into PR_CreateProcess
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char **my_argv = NULL;
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my_argv = (char **)malloc(sizeof(char *) * (count + 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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// copy the args
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PRUint32 i;
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for (i=0; i < count; i++) {
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my_argv[i+1] = NS_CONST_CAST(char*, args[i]);
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}
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// we need to set argv[0] to the program name.
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my_argv[0] = NS_CONST_CAST(char*, mTargetPath.get());
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// null terminate the array
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my_argv[count+1] = NULL;
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#if defined(XP_WIN)
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STARTUPINFO startupInfo;
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PROCESS_INFORMATION procInfo;
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BOOL retVal;
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char *cmdLine;
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if (assembleCmdLine(my_argv, &cmdLine) == -1) {
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nsMemory::Free(my_argv);
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return NS_ERROR_FILE_EXECUTION_FAILED;
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}
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ZeroMemory(&startupInfo, sizeof(startupInfo));
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startupInfo.cb = sizeof(startupInfo);
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retVal = CreateProcess(NULL,
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// NS_CONST_CAST(char*, mTargetPath.get()),
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cmdLine,
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NULL, /* security attributes for the new
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* process */
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NULL, /* security attributes for the primary
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* thread in the new process */
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FALSE, /* inherit handles */
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0, /* creation flags */
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NULL, /* env */
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NULL, /* current drive and directory */
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&startupInfo,
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&procInfo
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);
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PR_FREEIF( cmdLine );
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if (blocking) {
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// if success, wait for process termination. the early returns and such
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// are a bit ugly but preserving the logic of the nspr code I copied to
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// minimize our risk abit.
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if ( retVal == TRUE ) {
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DWORD dwRetVal;
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unsigned long exitCode;
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dwRetVal = WaitForSingleObject(procInfo.hProcess, INFINITE);
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if (dwRetVal == WAIT_FAILED) {
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nsMemory::Free(my_argv);
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return PR_FAILURE;
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}
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if (GetExitCodeProcess(procInfo.hProcess, &exitCode) == FALSE) {
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mExitValue = exitCode;
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nsMemory::Free(my_argv);
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return PR_FAILURE;
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}
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mExitValue = exitCode;
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CloseHandle(procInfo.hProcess);
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}
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else
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rv = PR_FAILURE;
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}
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else {
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// map return value into success code
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if ( retVal == TRUE )
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rv = PR_SUCCESS;
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else
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rv = PR_FAILURE;
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}
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#else
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if ( blocking ) {
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mProcess = PR_CreateProcess(mTargetPath.get(), my_argv, NULL, NULL);
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if (mProcess)
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rv = PR_WaitProcess(mProcess, &mExitValue);
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}
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else {
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rv = PR_CreateProcessDetached(mTargetPath.get(), my_argv, NULL, NULL);
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}
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#endif
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// free up our argv
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nsMemory::Free(my_argv);
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if (rv != PR_SUCCESS)
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return NS_ERROR_FILE_EXECUTION_FAILED;
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return NS_OK;
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}
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NS_IMETHODIMP nsProcess::InitWithPid(PRUint32 pid)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsProcess::GetLocation(nsIFile** aLocation)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsProcess::GetPid(PRUint32 *aPid)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsProcess::GetProcessName(char** aProcessName)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsProcess::GetProcessSignature(PRUint32 *aProcessSignature)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsProcess::Kill()
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{
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nsresult rv = NS_OK;
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if (mProcess)
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rv = PR_KillProcess(mProcess);
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return rv;
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}
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NS_IMETHODIMP
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nsProcess::GetExitValue(PRInt32 *aExitValue)
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{
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*aExitValue = mExitValue;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsProcess::GetEnvironment(const char *aName, char **aValue)
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{
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NS_ENSURE_ARG_POINTER(aName);
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*aValue = nsCRT::strdup(PR_GetEnv(aName));
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if (!*aValue)
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return NS_ERROR_OUT_OF_MEMORY;
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return NS_OK;
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}
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