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gecko/xpcom/threads/nsProcessCommon.cpp

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/* -*- 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):
* Don Bragg <dbragg@netscape.com>
*
* 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 ***** */
/*****************************************************************************
*
* nsProcess is used to execute new processes and specify if you want to
* wait (blocking) or continue (non-blocking).
*
*****************************************************************************
*/
#include "nsCOMPtr.h"
#include "nsMemory.h"
#include "nsProcess.h"
#include "prtypes.h"
#include "prio.h"
#include "prenv.h"
#include "nsCRT.h"
#include <stdlib.h>
#if defined(XP_WIN)
#include "prmem.h"
#include "nsString.h"
#include "nsLiteralString.h"
#include "nsReadableUtils.h"
#include <windows.h>
#endif
#if defined(XP_MACOSX)
#include <Processes.h>
#include "nsILocalFileMac.h"
#endif
//-------------------------------------------------------------------//
// nsIProcess implementation
//-------------------------------------------------------------------//
NS_IMPL_ISUPPORTS1(nsProcess, nsIProcess)
//Constructor
nsProcess::nsProcess()
: mExitValue(-1),
mProcess(nsnull)
{
}
NS_IMETHODIMP
nsProcess::Init(nsIFile* executable)
{
NS_ENSURE_ARG_POINTER(executable);
PRBool isFile;
//First make sure the file exists
nsresult rv = executable->IsFile(&isFile);
if (NS_FAILED(rv)) return rv;
if (!isFile)
return NS_ERROR_FAILURE;
//Store the nsIFile in mExecutable
mExecutable = executable;
//Get the path because it is needed by the NSPR process creation
#ifdef XP_WIN
rv = mExecutable->GetNativeTarget(mTargetPath);
if (NS_FAILED(rv) || mTargetPath.IsEmpty() )
#endif
rv = mExecutable->GetNativePath(mTargetPath);
return rv;
}
#if defined(XP_WIN)
// Out param `wideCmdLine` must be PR_Freed by the caller.
static int assembleCmdLine(char *const *argv, PRUnichar **wideCmdLine)
{
char *const *arg;
char *p, *q, *cmdLine;
int cmdLineSize;
int numBackslashes;
int i;
int argNeedQuotes;
/*
* Find out how large the command line buffer should be.
*/
cmdLineSize = 0;
for (arg = argv; *arg; arg++) {
/*
* \ and " need to be escaped by a \. In the worst case,
* every character is a \ or ", so the string of length
* may double. If we quote an argument, that needs two ".
* Finally, we need a space between arguments, and
* a null byte at the end of command line.
*/
cmdLineSize += 2 * strlen(*arg) /* \ and " need to be escaped */
+ 2 /* we quote every argument */
+ 1; /* space in between, or final null */
}
p = cmdLine = (char *) PR_MALLOC(cmdLineSize*sizeof(char));
if (p == NULL) {
return -1;
}
for (arg = argv; *arg; arg++) {
/* Add a space to separates the arguments */
if (arg != argv) {
*p++ = ' ';
}
q = *arg;
numBackslashes = 0;
argNeedQuotes = 0;
/* If the argument contains white space, it needs to be quoted. */
if (strpbrk(*arg, " \f\n\r\t\v")) {
argNeedQuotes = 1;
}
if (argNeedQuotes) {
*p++ = '"';
}
while (*q) {
if (*q == '\\') {
numBackslashes++;
q++;
} else if (*q == '"') {
if (numBackslashes) {
/*
* Double the backslashes since they are followed
* by a quote
*/
for (i = 0; i < 2 * numBackslashes; i++) {
*p++ = '\\';
}
numBackslashes = 0;
}
/* To escape the quote */
*p++ = '\\';
*p++ = *q++;
} else {
if (numBackslashes) {
/*
* Backslashes are not followed by a quote, so
* don't need to double the backslashes.
*/
for (i = 0; i < numBackslashes; i++) {
*p++ = '\\';
}
numBackslashes = 0;
}
*p++ = *q++;
}
}
/* Now we are at the end of this argument */
if (numBackslashes) {
/*
* Double the backslashes if we have a quote string
* delimiter at the end.
*/
if (argNeedQuotes) {
numBackslashes *= 2;
}
for (i = 0; i < numBackslashes; i++) {
*p++ = '\\';
}
}
if (argNeedQuotes) {
*p++ = '"';
}
}
*p = '\0';
PRInt32 numChars = MultiByteToWideChar(CP_ACP, 0, cmdLine, -1, NULL, 0);
*wideCmdLine = (PRUnichar *) PR_MALLOC(numChars*sizeof(PRUnichar));
MultiByteToWideChar(CP_ACP, 0, cmdLine, -1, *wideCmdLine, numChars);
PR_Free(cmdLine);
return 0;
}
#endif
// XXXldb |args| has the wrong const-ness
NS_IMETHODIMP
nsProcess::Run(PRBool blocking, const char **args, PRUint32 count,
PRUint32 *pid)
{
NS_ENSURE_TRUE(mExecutable, NS_ERROR_NOT_INITIALIZED);
PRStatus status = PR_SUCCESS;
// make sure that when we allocate we have 1 greater than the
// count since we need to null terminate the list for the argv to
// pass into PR_CreateProcess
char **my_argv = NULL;
my_argv = (char **)nsMemory::Alloc(sizeof(char *) * (count + 2) );
if (!my_argv) {
return NS_ERROR_OUT_OF_MEMORY;
}
// copy the args
PRUint32 i;
for (i=0; i < count; i++) {
my_argv[i+1] = const_cast<char*>(args[i]);
}
// we need to set argv[0] to the program name.
my_argv[0] = mTargetPath.BeginWriting();
// null terminate the array
my_argv[count+1] = NULL;
#if defined(XP_WIN) && !defined (WINCE) /* wince uses nspr */
STARTUPINFOW startupInfo;
PROCESS_INFORMATION procInfo;
BOOL retVal;
PRUnichar *cmdLine;
if (assembleCmdLine(my_argv, &cmdLine) == -1) {
nsMemory::Free(my_argv);
return NS_ERROR_FILE_EXECUTION_FAILED;
}
ZeroMemory(&startupInfo, sizeof(startupInfo));
startupInfo.cb = sizeof(startupInfo);
/* The CREATE_NO_WINDOW flag is important to prevent console
* windows from appearing. This makes behavior the same on all
* platforms. This won't work on win9x, however. The flag will
* not have any effect on non-console applications.
*/
retVal = CreateProcessW(NULL,
// const_cast<char*>(mTargetPath.get()),
cmdLine,
NULL, /* security attributes for the new
* process */
NULL, /* security attributes for the primary
* thread in the new process */
FALSE, /* inherit handles */
CREATE_NO_WINDOW, /* creation flags */
NULL, /* env */
NULL, /* current drive and directory */
&startupInfo,
&procInfo
);
PR_Free( cmdLine );
if (blocking) {
// if success, wait for process termination. the early returns and such
// are a bit ugly but preserving the logic of the nspr code I copied to
// minimize our risk abit.
if ( retVal == TRUE ) {
DWORD dwRetVal;
unsigned long exitCode;
dwRetVal = WaitForSingleObject(procInfo.hProcess, INFINITE);
if (dwRetVal == WAIT_FAILED) {
nsMemory::Free(my_argv);
return NS_ERROR_FAILURE;
}
if (GetExitCodeProcess(procInfo.hProcess, &exitCode) == FALSE) {
mExitValue = exitCode;
nsMemory::Free(my_argv);
return NS_ERROR_FAILURE;
}
mExitValue = exitCode;
CloseHandle(procInfo.hProcess);
CloseHandle(procInfo.hThread);
}
else
status = PR_FAILURE;
}
else {
// map return value into success code
if (retVal == TRUE)
status = PR_SUCCESS;
else
status = PR_FAILURE;
}
#else // Note, this must not be an #elif ...!
#if defined(XP_MACOSX)
if (count == 0) {
FSSpec resolvedSpec;
OSErr err = noErr;
nsCOMPtr<nsILocalFileMac> macExecutable =
do_QueryInterface(mExecutable);
macExecutable->GetFSSpec(&resolvedSpec);
LaunchParamBlockRec launchPB;
launchPB.launchAppSpec = &resolvedSpec;
launchPB.launchAppParameters = NULL;
launchPB.launchBlockID = extendedBlock;
launchPB.launchEPBLength = extendedBlockLen;
launchPB.launchFileFlags = NULL;
launchPB.launchControlFlags =
launchContinue + launchNoFileFlags + launchUseMinimum;
if (!blocking)
launchPB.launchControlFlags += launchDontSwitch;
err = LaunchApplication(&launchPB);
// NOTE: blocking mode assumes you are running on a thread
// other than the UI thread that has the main event loop
if (blocking && err == noErr) {
while (1) {
ProcessInfoRec info;
info.processInfoLength = sizeof(ProcessInfoRec);
info.processName = NULL;
info.processAppSpec = NULL;
err = GetProcessInformation(&launchPB.launchProcessSN, &info);
if (err != noErr) {
// The process is no longer in the process
// manager's internal list, assume the process is
// done.
err = noErr;
break;
}
// still running so sleep some more (200 msecs)
PR_Sleep(200);
}
}
if (err != noErr) {
status = PR_FAILURE;
}
if (blocking) {
mExitValue = err;
}
} else
#endif
{
if (blocking) {
mProcess = PR_CreateProcess(mTargetPath.get(), my_argv, NULL,
NULL);
if (mProcess)
status = PR_WaitProcess(mProcess, &mExitValue);
} else {
status = PR_CreateProcessDetached(mTargetPath.get(), my_argv, NULL,
NULL);
}
}
#endif
// free up our argv
nsMemory::Free(my_argv);
if (status != PR_SUCCESS)
return NS_ERROR_FILE_EXECUTION_FAILED;
return NS_OK;
}
NS_IMETHODIMP nsProcess::InitWithPid(PRUint32 pid)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsProcess::GetLocation(nsIFile** aLocation)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsProcess::GetPid(PRUint32 *aPid)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsProcess::GetProcessName(char** aProcessName)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsProcess::GetProcessSignature(PRUint32 *aProcessSignature)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsProcess::Kill()
{
nsresult rv = NS_OK;
if (mProcess)
rv = PR_KillProcess(mProcess) == PR_SUCCESS ? NS_OK : NS_ERROR_FAILURE;
return rv;
}
NS_IMETHODIMP
nsProcess::GetExitValue(PRInt32 *aExitValue)
{
*aExitValue = mExitValue;
return NS_OK;
}
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