| 1 | /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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| 2 | /* ***** BEGIN LICENSE BLOCK *****
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| 3 | * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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| 4 | *
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| 5 | * The contents of this file are subject to the Mozilla Public License Version
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| 6 | * 1.1 (the "License"); you may not use this file except in compliance with
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| 7 | * the License. You may obtain a copy of the License at
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| 8 | * http://www.mozilla.org/MPL/
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| 9 | *
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| 10 | * Software distributed under the License is distributed on an "AS IS" basis,
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| 11 | * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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| 12 | * for the specific language governing rights and limitations under the
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| 13 | * License.
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| 14 | *
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| 15 | * The Original Code is Mozilla Communicator client code, released
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| 16 | * March 31, 1998.
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| 17 | *
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| 18 | * The Initial Developer of the Original Code is
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| 19 | * Netscape Communications Corporation.
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| 20 | * Portions created by the Initial Developer are Copyright (C) 1998-1999
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| 21 | * the Initial Developer. All Rights Reserved.
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| 22 | *
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| 23 | * Contributor(s):
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| 24 | * Don Bragg <dbragg@netscape.com>
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| 25 | *
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| 26 | * Alternatively, the contents of this file may be used under the terms of
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| 27 | * either of the GNU General Public License Version 2 or later (the "GPL"),
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| 28 | * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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| 29 | * in which case the provisions of the GPL or the LGPL are applicable instead
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| 30 | * of those above. If you wish to allow use of your version of this file only
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| 31 | * under the terms of either the GPL or the LGPL, and not to allow others to
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| 32 | * use your version of this file under the terms of the MPL, indicate your
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| 33 | * decision by deleting the provisions above and replace them with the notice
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| 34 | * and other provisions required by the GPL or the LGPL. If you do not delete
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| 35 | * the provisions above, a recipient may use your version of this file under
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| 36 | * the terms of any one of the MPL, the GPL or the LGPL.
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| 37 | *
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| 38 | * ***** END LICENSE BLOCK ***** */
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| 39 |
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| 40 | /*****************************************************************************
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| 41 | *
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| 42 | * nsProcess is used to execute new processes and specify if you want to
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| 43 | * wait (blocking) or continue (non-blocking).
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| 44 | *
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| 45 | *****************************************************************************
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| 46 | */
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| 47 |
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| 48 | #include "nsCOMPtr.h"
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| 49 | #include "nsMemory.h"
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| 50 | #include "nsProcess.h"
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| 51 | #include "prtypes.h"
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| 52 | #include "prio.h"
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| 53 | #include "prenv.h"
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| 54 | #include "nsCRT.h"
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| 55 |
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| 56 | #include <stdlib.h>
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| 57 |
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| 58 | #if defined( XP_WIN )
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| 59 | #include "prmem.h"
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| 60 | #include "nsString.h"
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| 61 | #include "nsLiteralString.h"
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| 62 | #include "nsReadableUtils.h"
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| 63 | #include <windows.h>
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| 64 | #endif
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| 65 |
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| 66 | //-------------------------------------------------------------------//
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| 67 | // nsIProcess implementation
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| 68 | //-------------------------------------------------------------------//
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| 69 | NS_IMPL_ISUPPORTS1(nsProcess, nsIProcess)
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| 70 |
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| 71 | //Constructor
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| 72 | nsProcess::nsProcess():mExitValue(-1),
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| 73 | mProcess(nsnull)
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| 74 | {
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| 75 | }
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| 76 |
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| 77 | NS_IMETHODIMP
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| 78 | nsProcess::Init(nsIFile* executable)
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| 79 | {
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| 80 | PRBool isFile;
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| 81 |
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| 82 | //First make sure the file exists
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| 83 | nsresult rv = executable->IsFile(&isFile);
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| 84 | if (NS_FAILED(rv)) return rv;
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| 85 | if (!isFile)
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| 86 | return NS_ERROR_FAILURE;
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| 87 |
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| 88 | //Store the nsIFile in mExecutable
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| 89 | mExecutable = executable;
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| 90 | //Get the path because it is needed by the NSPR process creation
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| 91 | #ifdef XP_WIN
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| 92 | rv = mExecutable->GetNativeTarget(mTargetPath);
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| 93 | if (NS_FAILED(rv) || mTargetPath.IsEmpty() )
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| 94 | #endif
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| 95 | rv = mExecutable->GetNativePath(mTargetPath);
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| 96 |
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| 97 | return rv;
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| 98 | }
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| 99 |
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| 100 |
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| 101 | #if defined( XP_WIN )
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| 102 | static int assembleCmdLine(char *const *argv, char **cmdLine)
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| 103 | {
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| 104 | char *const *arg;
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| 105 | char *p, *q;
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| 106 | int cmdLineSize;
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| 107 | int numBackslashes;
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| 108 | int i;
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| 109 | int argNeedQuotes;
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| 110 |
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| 111 | /*
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| 112 | * Find out how large the command line buffer should be.
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| 113 | */
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| 114 | cmdLineSize = 0;
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| 115 | for (arg = argv; *arg; arg++) {
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| 116 | /*
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| 117 | * \ and " need to be escaped by a \. In the worst case,
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| 118 | * every character is a \ or ", so the string of length
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| 119 | * may double. If we quote an argument, that needs two ".
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| 120 | * Finally, we need a space between arguments, and
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| 121 | * a null byte at the end of command line.
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| 122 | */
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| 123 | cmdLineSize += 2 * strlen(*arg) /* \ and " need to be escaped */
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| 124 | + 2 /* we quote every argument */
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| 125 | + 1; /* space in between, or final null */
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| 126 | }
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| 127 | p = *cmdLine = (char *) PR_MALLOC(cmdLineSize);
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| 128 | if (p == NULL) {
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| 129 | return -1;
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| 130 | }
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| 131 |
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| 132 | for (arg = argv; *arg; arg++) {
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| 133 | /* Add a space to separates the arguments */
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| 134 | if (arg != argv) {
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| 135 | *p++ = ' ';
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| 136 | }
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| 137 | q = *arg;
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| 138 | numBackslashes = 0;
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| 139 | argNeedQuotes = 0;
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| 140 |
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| 141 | /* If the argument contains white space, it needs to be quoted. */
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| 142 | if (strpbrk(*arg, " \f\n\r\t\v")) {
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| 143 | argNeedQuotes = 1;
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| 144 | }
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| 145 |
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| 146 | if (argNeedQuotes) {
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| 147 | *p++ = '"';
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| 148 | }
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| 149 | while (*q) {
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| 150 | if (*q == '\\') {
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| 151 | numBackslashes++;
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| 152 | q++;
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| 153 | } else if (*q == '"') {
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| 154 | if (numBackslashes) {
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| 155 | /*
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| 156 | * Double the backslashes since they are followed
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| 157 | * by a quote
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| 158 | */
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| 159 | for (i = 0; i < 2 * numBackslashes; i++) {
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| 160 | *p++ = '\\';
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| 161 | }
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| 162 | numBackslashes = 0;
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| 163 | }
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| 164 | /* To escape the quote */
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| 165 | *p++ = '\\';
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| 166 | *p++ = *q++;
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| 167 | } else {
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| 168 | if (numBackslashes) {
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| 169 | /*
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| 170 | * Backslashes are not followed by a quote, so
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| 171 | * don't need to double the backslashes.
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| 172 | */
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| 173 | for (i = 0; i < numBackslashes; i++) {
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| 174 | *p++ = '\\';
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| 175 | }
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| 176 | numBackslashes = 0;
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| 177 | }
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| 178 | *p++ = *q++;
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| 179 | }
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| 180 | }
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| 181 |
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| 182 | /* Now we are at the end of this argument */
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| 183 | if (numBackslashes) {
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| 184 | /*
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| 185 | * Double the backslashes if we have a quote string
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| 186 | * delimiter at the end.
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| 187 | */
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| 188 | if (argNeedQuotes) {
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| 189 | numBackslashes *= 2;
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| 190 | }
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| 191 | for (i = 0; i < numBackslashes; i++) {
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| 192 | *p++ = '\\';
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| 193 | }
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| 194 | }
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| 195 | if (argNeedQuotes) {
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| 196 | *p++ = '"';
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| 197 | }
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| 198 | }
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| 199 |
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| 200 | *p = '\0';
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| 201 | return 0;
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| 202 | }
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| 203 | #endif
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| 204 |
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| 205 | // XXXldb |args| has the wrong const-ness
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| 206 | NS_IMETHODIMP
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| 207 | nsProcess::Run(PRBool blocking, const char **args, PRUint32 count, PRUint32 *pid)
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| 208 | {
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| 209 | nsresult rv = NS_OK;
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| 210 |
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| 211 | // make sure that when we allocate we have 1 greater than the
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| 212 | // count since we need to null terminate the list for the argv to
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| 213 | // pass into PR_CreateProcess
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| 214 | char **my_argv = NULL;
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| 215 | my_argv = (char **)malloc(sizeof(char *) * (count + 2) );
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| 216 | if (!my_argv) {
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| 217 | return NS_ERROR_OUT_OF_MEMORY;
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| 218 | }
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| 219 |
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| 220 | // copy the args
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| 221 | PRUint32 i;
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| 222 | for (i=0; i < count; i++) {
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| 223 | my_argv[i+1] = NS_CONST_CAST(char*, args[i]);
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| 224 | }
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| 225 | // we need to set argv[0] to the program name.
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| 226 | my_argv[0] = mTargetPath.BeginWriting();
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| 227 | // null terminate the array
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| 228 | my_argv[count+1] = NULL;
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| 229 |
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| 230 | #if defined(XP_WIN)
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| 231 | STARTUPINFO startupInfo;
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| 232 | PROCESS_INFORMATION procInfo;
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| 233 | BOOL retVal;
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| 234 | char *cmdLine;
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| 235 |
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| 236 | if (assembleCmdLine(my_argv, &cmdLine) == -1) {
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| 237 | nsMemory::Free(my_argv);
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| 238 | return NS_ERROR_FILE_EXECUTION_FAILED;
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| 239 | }
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| 240 |
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| 241 | ZeroMemory(&startupInfo, sizeof(startupInfo));
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| 242 | startupInfo.cb = sizeof(startupInfo);
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| 243 |
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| 244 | retVal = CreateProcess(NULL,
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| 245 | // NS_CONST_CAST(char*, mTargetPath.get()),
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| 246 | cmdLine,
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| 247 | NULL, /* security attributes for the new
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| 248 | * process */
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| 249 | NULL, /* security attributes for the primary
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| 250 | * thread in the new process */
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| 251 | FALSE, /* inherit handles */
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| 252 | 0, /* creation flags */
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| 253 | NULL, /* env */
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| 254 | NULL, /* current drive and directory */
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| 255 | &startupInfo,
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| 256 | &procInfo
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| 257 | );
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| 258 | PR_FREEIF( cmdLine );
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| 259 | if (blocking) {
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| 260 |
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| 261 | // if success, wait for process termination. the early returns and such
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| 262 | // are a bit ugly but preserving the logic of the nspr code I copied to
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| 263 | // minimize our risk abit.
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| 264 |
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| 265 | if ( retVal == TRUE ) {
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| 266 | DWORD dwRetVal;
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| 267 | unsigned long exitCode;
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| 268 |
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| 269 | dwRetVal = WaitForSingleObject(procInfo.hProcess, INFINITE);
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| 270 | if (dwRetVal == WAIT_FAILED) {
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| 271 | nsMemory::Free(my_argv);
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| 272 | return PR_FAILURE;
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| 273 | }
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| 274 | if (GetExitCodeProcess(procInfo.hProcess, &exitCode) == FALSE) {
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| 275 | mExitValue = exitCode;
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| 276 | nsMemory::Free(my_argv);
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| 277 | return PR_FAILURE;
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| 278 | }
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| 279 | mExitValue = exitCode;
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| 280 | CloseHandle(procInfo.hProcess);
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| 281 | }
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| 282 | else
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| 283 | rv = PR_FAILURE;
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| 284 | }
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| 285 | else {
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| 286 |
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| 287 | // map return value into success code
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| 288 |
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| 289 | if ( retVal == TRUE )
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| 290 | rv = PR_SUCCESS;
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| 291 | else
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| 292 | rv = PR_FAILURE;
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| 293 | }
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| 294 |
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| 295 | #else
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| 296 | if ( blocking ) {
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| 297 | mProcess = PR_CreateProcess(mTargetPath.get(), my_argv, NULL, NULL);
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| 298 | if (mProcess)
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| 299 | rv = PR_WaitProcess(mProcess, &mExitValue);
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| 300 | }
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| 301 | else {
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| 302 | rv = PR_CreateProcessDetached(mTargetPath.get(), my_argv, NULL, NULL);
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| 303 | }
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| 304 | #endif
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| 305 |
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| 306 | // free up our argv
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| 307 | nsMemory::Free(my_argv);
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| 308 |
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| 309 | if (rv != PR_SUCCESS)
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| 310 | return NS_ERROR_FILE_EXECUTION_FAILED;
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| 311 | return NS_OK;
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| 312 | }
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| 313 |
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| 314 | NS_IMETHODIMP nsProcess::InitWithPid(PRUint32 pid)
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| 315 | {
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| 316 | return NS_ERROR_NOT_IMPLEMENTED;
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| 317 | }
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| 318 |
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| 319 | NS_IMETHODIMP
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| 320 | nsProcess::GetLocation(nsIFile** aLocation)
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| 321 | {
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| 322 | return NS_ERROR_NOT_IMPLEMENTED;
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| 323 | }
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| 324 |
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| 325 | NS_IMETHODIMP
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| 326 | nsProcess::GetPid(PRUint32 *aPid)
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| 327 | {
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| 328 | return NS_ERROR_NOT_IMPLEMENTED;
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| 329 | }
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| 330 |
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| 331 | NS_IMETHODIMP
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| 332 | nsProcess::GetProcessName(char** aProcessName)
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| 333 | {
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| 334 | return NS_ERROR_NOT_IMPLEMENTED;
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| 335 | }
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| 336 |
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| 337 | NS_IMETHODIMP
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| 338 | nsProcess::GetProcessSignature(PRUint32 *aProcessSignature)
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| 339 | {
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| 340 | return NS_ERROR_NOT_IMPLEMENTED;
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| 341 | }
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| 342 |
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| 343 | NS_IMETHODIMP
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| 344 | nsProcess::Kill()
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| 345 | {
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| 346 | nsresult rv = NS_OK;
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| 347 | if (mProcess)
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| 348 | rv = PR_KillProcess(mProcess);
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| 349 |
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| 350 | return rv;
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| 351 | }
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| 352 |
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| 353 | NS_IMETHODIMP
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| 354 | nsProcess::GetExitValue(PRInt32 *aExitValue)
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| 355 | {
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| 356 | *aExitValue = mExitValue;
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| 357 |
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| 358 | return NS_OK;
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| 359 | }
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