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   process.g

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   system.g

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source\lib\stdlib\process.g
  1 /******************************************************************************
  2 *
  3 * Copyright (C) 2004-2007, The Gentee Group. All rights reserved. 
  4 * This file is part of the Gentee open source project - http://www.gentee.com. 
  5 * 
  6 * THIS FILE IS PROVIDED UNDER THE TERMS OF THE GENTEE LICENSE ("AGREEMENT"). 
  7 * ANY USE, REPRODUCTION OR DISTRIBUTION OF THIS FILE CONSTITUTES RECIPIENTS 
  8 * ACCEPTANCE OF THE AGREEMENT.
  9 *
 10 * Author: Alexey Krivonogov ( gentee )
 11 *
 12 ******************************************************************************/
 13 
 14 /*-----------------------------------------------------------------------------
 15 * Id: process L "Process"
 16 * 
 17 * Summary: Process, shell, arguments and environment functions.
 18 *
 19 * List: *,argc,argv,exit,getenv,processf,setenv,shell  
 20 * 
 21 -----------------------------------------------------------------------------*/
 22 
 23 /*-----------------------------------------------------------------------------
 24 * Id: processf F process
 25 *
 26 * Summary: Starting a process.  
 27 *  
 28 * Params: cmdline - The command line. 
 29           workdir - The working directory. It can be 0->str. 
 30           result - The pointer to uint for getting the result. If #b(0), the /
 31           function will not wait until the process finishes its work. 
 32 * 
 33 * Return: #b(1) if the calling process was successful; otherwise #b(0). 
 34 *
 35 -----------------------------------------------------------------------------*/
 36 
 37 func uint process( str cmdline, str workdir, uint result, uint state )
 38 {
 39    PROCESS_INFORMATION  stpi
 40    STARTUPINFO          start
 41    uint                 handle
 42 
 43    start.cb = sizeof( STARTUPINFO )
 44    if state != $SW_SHOWNORMAL
 45    {
 46       start.wShowWindow = state
 47       start.dwFlags = 1 //$STARTF_USESHOWWINDOW
 48    }
 49    handle = CreateProcess( 0, cmdline.ptr( ), 0, 0, 1,
 50                      $CREATE_DEFAULT_ERROR_MODE | $NORMAL_PRIORITY_CLASS, 
 51                      0, ?( workdir && *workdir, workdir.ptr(), 0 ), 
 52                      start, stpi )
 53    if !handle && GetLastError( ) == 740 //ERROR_ELEVATION_REQUIRED
 54    {
 55 /*      if ( ShellExecute( 0, "runas".ptr(), cmdline.ptr(), 0, 
 56                ?( workdir && *workdir, workdir.ptr(), 0 ), $SW_SHOWNORMAL ))
 57       {
 58          return 1
 59       }*/ 
 60       SHELLEXECUTEINFO shex
 61       str              filename params
 62       uint             off
 63       
 64       if cmdline[0] == '"'
 65       { 
 66          off = cmdline.findchfrom( '"', 1 )
 67          filename.substr( cmdline, 1, off - 1 )
 68          params.substr( cmdline, off + 1, *cmdline - off - 1 )
 69       }
 70       else
 71       {
 72          off = cmdline.findchfrom( ' ', 0 )
 73          filename.substr( cmdline, 0, off )
 74          params.substr( cmdline, off + 1, *cmdline - off - 1 )
 75       }
 76       shex.cbSize = sizeof( SHELLEXECUTEINFO )
 77 //      shex.fMask = 0
 78 //         shex.hwnd = NULL;
 79       shex.lpVerb = "runas".ptr()
 80       shex.lpFile = filename.ptr()
 81       shex.lpParameters = ?( *params, params.ptr(), 0 )
 82       shex.lpDirectory = ?( workdir && *workdir, workdir.ptr(), 0 )
 83       shex.nShow = state;
 84       return ShellExecuteEx( shex )
 85    }
 86    if handle                     
 87    {
 88       if result 
 89       {
 90          WaitForSingleObject( stpi.hThread, $INFINITE )
 91          GetExitCodeProcess( stpi.hProcess, result )
 92       }
 93       CloseHandle( stpi.hThread )
 94       CloseHandle( stpi.hProcess )
 95       return 1
 96    }
 97    return 0
 98 }
 99 
100 func uint process( str cmdline, str workdir, uint result )
101 {
102    return process( cmdline, workdir, result, $SW_SHOWNORMAL )
103 }
104 
105 /*-----------------------------------------------------------------------------
106 * Id: shell F
107 *
108 * Summary: Launch or open a file in the associated application.  
109 *  
110 * Params: name - Filename. 
111 * 
112 -----------------------------------------------------------------------------*/
113 
114 func shell( str name )
115 {
116    ShellExecute( 0, "open".ptr(), name.ptr(), 0, 0, $SW_SHOWNORMAL )
117 }
118 
119 /*-----------------------------------------------------------------------------
120 * Id: exit F
121 *
122 * Summary: Exit the current program.  
123 *  
124 * Params: code - A return code or the results of the work of the program. 
125 * 
126 -----------------------------------------------------------------------------*/
127 
128 func exit( uint code )
129 {
130    ExitProcess( code )
131 }
132 
133 /*-----------------------------------------------------------------------------
134 * Id: getenv F 
135 *
136 * Summary: Get an environment variable.
137 *  
138 * Params: varname - Environment variable name. 
139           ret - String for getting the value. 
140 * 
141 * Return: #lng/retpar( ret ) 
142 *
143 -----------------------------------------------------------------------------*/
144 
145 func str getenv( str varname, str ret )
146 {
147    uint ptr
148    
149    ret.clear()
150    if ptr = _getenv( varname.ptr())
151    {
152       ret.copy( ptr )
153    }
154    return ret   
155 }
156 
157 /*-----------------------------------------------------------------------------
158 ** Id: setenv F 
159 *
160 * Summary: Set a value of an environment variable. The function adds new
161            environment variable or modifies the value of the existing
162            environment variable. New values will be valid only in the 
163            current process. 
164 *  
165 * Params: varname - Environment variable name. 
166           varvalue - A new value of the environment variable. 
167 * 
168 * Return: #lng/retf# 
169 *
170 -----------------------------------------------------------------------------*/
171 
172 func uint setenv( str varname, str varvalue )
173 {
174    return ?( _setenv( "\(varname)=\(varvalue)".ptr()), 0, 1 )   
175 }
176 
177