Source/cmExecuteProcessCommand.cxx

   1 /*=========================================================================
   2
   3   Program:   CMake - Cross-Platform Makefile Generator
   4   Module:    $RCSfile: cmExecuteProcessCommand.cxx,v $
   5   Language:  C++
   6   Date:      $Date: 2008-01-23 15:27:59 $
   7   Version:   $Revision: 1.10 $
   8
   9   Copyright (c) 2002 Kitware, Inc., Insight Consortium.  All rights reserved.
  10   See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
  11
  12      This software is distributed WITHOUT ANY WARRANTY; without even
  13      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  14      PURPOSE.  See the above copyright notices for more information.
  15
  16 =========================================================================*/
  17 #include "cmExecuteProcessCommand.h"
  18 #include "cmSystemTools.h"
  19
  20 #include <cmsys/Process.h>
  21
  22 #include <ctype.h> /* isspace */
  23
  24 static bool cmExecuteProcessCommandIsWhitespace(char c)
  25 {
  26   return (isspace((int)c) || c == '\n' || c == '\r');
  27 }
  28
  29 void cmExecuteProcessCommandFixText(std::vector<char>& output,
  30                                     bool strip_trailing_whitespace);
  31 void cmExecuteProcessCommandAppend(std::vector<char>& output,
  32                                    const char* data, int length);
  33
  34 // cmExecuteProcessCommand
  35 bool cmExecuteProcessCommand
  36 ::InitialPass(std::vector<std::string> const& args, cmExecutionStatus &)
  37 {
  38   if(args.size() < 1 )
  39     {
  40     this->SetError("called with incorrect number of arguments");
  41     return false;
  42     }
  43   std::vector< std::vector<const char*> > cmds;
  44   std::string arguments;
  45   bool doing_command = false;
  46   size_t command_index = 0;
  47   bool output_quiet = false;
  48   bool error_quiet = false;
  49   bool output_strip_trailing_whitespace = false;
  50   bool error_strip_trailing_whitespace = false;
  51   std::string timeout_string;
  52   std::string input_file;
  53   std::string output_file;
  54   std::string error_file;
  55   std::string output_variable;
  56   std::string error_variable;
  57   std::string result_variable;
  58   std::string working_directory;
  59   for(size_t i=0; i < args.size(); ++i)
  60     {
  61     if(args[i] == "COMMAND")
  62       {
  63       doing_command = true;
  64       command_index = cmds.size();
  65       cmds.push_back(std::vector<const char*>());
  66       }
  67     else if(args[i] == "OUTPUT_VARIABLE")
  68       {
  69       doing_command = false;
  70       if(++i < args.size())
  71         {
  72         output_variable = args[i];
  73         }
  74       else
  75         {
  76         this->SetError(" called with no value for OUTPUT_VARIABLE.");
  77         return false;
  78         }
  79       }
  80     else if(args[i] == "ERROR_VARIABLE")
  81       {
  82       doing_command = false;
  83       if(++i < args.size())
  84         {
  85         error_variable = args[i];
  86         }
  87       else
  88         {
  89         this->SetError(" called with no value for ERROR_VARIABLE.");
  90         return false;
  91         }
  92       }
  93     else if(args[i] == "RESULT_VARIABLE")
  94       {
  95       doing_command = false;
  96       if(++i < args.size())
  97         {
  98         result_variable = args[i];
  99         }
 100       else
 101         {
 102         this->SetError(" called with no value for RESULT_VARIABLE.");
 103         return false;
 104         }
 105       }
 106     else if(args[i] == "WORKING_DIRECTORY")
 107       {
 108       doing_command = false;
 109       if(++i < args.size())
 110         {
 111         working_directory = args[i];
 112         }
 113       else
 114         {
 115         this->SetError(" called with no value for WORKING_DIRECTORY.");
 116         return false;
 117         }
 118       }
 119     else if(args[i] == "INPUT_FILE")
 120       {
 121       doing_command = false;
 122       if(++i < args.size())
 123         {
 124         input_file = args[i];
 125         }
 126       else
 127         {
 128         this->SetError(" called with no value for INPUT_FILE.");
 129         return false;
 130         }
 131       }
 132     else if(args[i] == "OUTPUT_FILE")
 133       {
 134       doing_command = false;
 135       if(++i < args.size())
 136         {
 137         output_file = args[i];
 138         }
 139       else
 140         {
 141         this->SetError(" called with no value for OUTPUT_FILE.");
 142         return false;
 143         }
 144       }
 145     else if(args[i] == "ERROR_FILE")
 146       {
 147       doing_command = false;
 148       if(++i < args.size())
 149         {
 150         error_file = args[i];
 151         }
 152       else
 153         {
 154         this->SetError(" called with no value for ERROR_FILE.");
 155         return false;
 156         }
 157       }
 158     else if(args[i] == "TIMEOUT")
 159       {
 160       doing_command = false;
 161       if(++i < args.size())
 162         {
 163         timeout_string = args[i];
 164         }
 165       else
 166         {
 167         this->SetError(" called with no value for TIMEOUT.");
 168         return false;
 169         }
 170       }
 171     else if(args[i] == "OUTPUT_QUIET")
 172       {
 173       doing_command = false;
 174       output_quiet = true;
 175       }
 176     else if(args[i] == "ERROR_QUIET")
 177       {
 178       doing_command = false;
 179       error_quiet = true;
 180       }
 181     else if(args[i] == "OUTPUT_STRIP_TRAILING_WHITESPACE")
 182       {
 183       doing_command = false;
 184       output_strip_trailing_whitespace = true;
 185       }
 186     else if(args[i] == "ERROR_STRIP_TRAILING_WHITESPACE")
 187       {
 188       doing_command = false;
 189       error_strip_trailing_whitespace = true;
 190       }
 191     else if(doing_command)
 192       {
 193       cmds[command_index].push_back(args[i].c_str());
 194       }
 195     else
 196       {
 197       cmOStringStream e;
 198       e << " given unknown argument \"" << args[i] << "\".";
 199       this->SetError(e.str().c_str());
 200       return false;
 201       }
 202     }
 203
 204   if ( !this->Makefile->CanIWriteThisFile(output_file.c_str()) )
 205     {
 206     std::string e = "attempted to output into a file: " + output_file
 207       + " into a source directory.";
 208     this->SetError(e.c_str());
 209     cmSystemTools::SetFatalErrorOccured();
 210     return false;
 211     }
 212
 213   // Check for commands given.
 214   if(cmds.empty())
 215     {
 216     this->SetError(" called with no COMMAND argument.");
 217     return false;
 218     }
 219   for(unsigned int i=0; i < cmds.size(); ++i)
 220     {
 221     if(cmds[i].empty())
 222       {
 223       this->SetError(" given COMMAND argument with no value.");
 224       return false;
 225       }
 226     else
 227       {
 228       // Add the null terminating pointer to the command argument list.
 229       cmds[i].push_back(0);
 230       }
 231     }
 232
 233   // Parse the timeout string.
 234   double timeout = -1;
 235   if(!timeout_string.empty())
 236     {
 237     if(sscanf(timeout_string.c_str(), "%lg", &timeout) != 1)
 238       {
 239       this->SetError(" called with TIMEOUT value that could not be parsed.");
 240       return false;
 241       }
 242     }
 243
 244   // Create a process instance.
 245   cmsysProcess* cp = cmsysProcess_New();
 246
 247   // Set the command sequence.
 248   for(unsigned int i=0; i < cmds.size(); ++i)
 249     {
 250     cmsysProcess_AddCommand(cp, &*cmds[i].begin());
 251     }
 252
 253   // Set the process working directory.
 254   if(!working_directory.empty())
 255     {
 256     cmsysProcess_SetWorkingDirectory(cp, working_directory.c_str());
 257     }
 258
 259   // Always hide the process window.
 260   cmsysProcess_SetOption(cp, cmsysProcess_Option_HideWindow, 1);
 261
 262   // Check the output variables.
 263   bool merge_output = (output_variable == error_variable);
 264   if(error_variable.empty() && !error_quiet)
 265     {
 266     cmsysProcess_SetPipeShared(cp, cmsysProcess_Pipe_STDERR, 1);
 267     }
 268   if(!input_file.empty())
 269     {
 270     cmsysProcess_SetPipeFile(cp, cmsysProcess_Pipe_STDIN, input_file.c_str());
 271     }
 272   if(!output_file.empty())
 273     {
 274     cmsysProcess_SetPipeFile(cp, cmsysProcess_Pipe_STDOUT,
 275                              output_file.c_str());
 276     }
 277   if(!error_file.empty())
 278     {
 279     cmsysProcess_SetPipeFile(cp, cmsysProcess_Pipe_STDERR,
 280                              error_file.c_str());
 281     }
 282
 283   // Set the timeout if any.
 284   if(timeout >= 0)
 285     {
 286     cmsysProcess_SetTimeout(cp, timeout);
 287     }
 288
 289   // Start the process.
 290   cmsysProcess_Execute(cp);
 291
 292   // Read the process output.
 293   std::vector<char> tempOutput;
 294   std::vector<char> tempError;
 295   int length;
 296   char* data;
 297   int p;
 298   while((p = cmsysProcess_WaitForData(cp, &data, &length, 0), p))
 299     {
 300     // Put the output in the right place.
 301     if(p == cmsysProcess_Pipe_STDOUT && !output_quiet ||
 302        p == cmsysProcess_Pipe_STDERR && !error_quiet && merge_output)
 303       {
 304       if(output_variable.empty())
 305         {
 306         cmSystemTools::Stdout(data, length);
 307         }
 308       else
 309         {
 310         cmExecuteProcessCommandAppend(tempOutput, data, length);
 311         }
 312       }
 313     else if(p == cmsysProcess_Pipe_STDERR && !error_quiet)
 314       {
 315       if(!error_variable.empty())
 316         {
 317         cmExecuteProcessCommandAppend(tempError, data, length);
 318         }
 319       }
 320     }
 321
 322   // All output has been read.  Wait for the process to exit.
 323   cmsysProcess_WaitForExit(cp, 0);
 324
 325   // Fix the text in the output strings.
 326   cmExecuteProcessCommandFixText(tempOutput,
 327                                  output_strip_trailing_whitespace);
 328   cmExecuteProcessCommandFixText(tempError,
 329                                  error_strip_trailing_whitespace);
 330
 331   // Store the output obtained.
 332   if(!output_variable.empty() && tempOutput.size())
 333     {
 334     this->Makefile->AddDefinition(output_variable.c_str(),
 335                                   &*tempOutput.begin());
 336     }
 337   if(!merge_output && !error_variable.empty() && tempError.size())
 338     {
 339     this->Makefile->AddDefinition(error_variable.c_str(),
 340                                   &*tempError.begin());
 341     }
 342
 343   // Store the result of running the process.
 344   if(!result_variable.empty())
 345     {
 346     switch(cmsysProcess_GetState(cp))
 347       {
 348       case cmsysProcess_State_Exited:
 349         {
 350         int v = cmsysProcess_GetExitValue(cp);
 351         char buf[100];
 352         sprintf(buf, "%d", v);
 353         this->Makefile->AddDefinition(result_variable.c_str(), buf);
 354         }
 355         break;
 356       case cmsysProcess_State_Exception:
 357         this->Makefile->AddDefinition(result_variable.c_str(),
 358                                   cmsysProcess_GetExceptionString(cp));
 359         break;
 360       case cmsysProcess_State_Error:
 361         this->Makefile->AddDefinition(result_variable.c_str(),
 362                                   cmsysProcess_GetErrorString(cp));
 363         break;
 364       case cmsysProcess_State_Expired:
 365         this->Makefile->AddDefinition(result_variable.c_str(),
 366                                   "Process terminated due to timeout");
 367         break;
 368       }
 369     }
 370
 371   // Delete the process instance.
 372   cmsysProcess_Delete(cp);
 373
 374   return true;
 375 }
 376
 377 //----------------------------------------------------------------------------
 378 void cmExecuteProcessCommandFixText(std::vector<char>& output,
 379                                     bool strip_trailing_whitespace)
 380 {
 381   // Remove \0 characters and the \r part of \r\n pairs.
 382   unsigned int in_index = 0;
 383   unsigned int out_index = 0;
 384   while(in_index < output.size())
 385     {
 386     char c = output[in_index++];
 387     if((c != '\r' || !(in_index < output.size() && output[in_index] == '\n'))
 388        && c != '\0')
 389       {
 390       output[out_index++] = c;
 391       }
 392     }
 393
 394   // Remove trailing whitespace if requested.
 395   if(strip_trailing_whitespace)
 396     {
 397     while(out_index > 0 &&
 398           cmExecuteProcessCommandIsWhitespace(output[out_index-1]))
 399       {
 400       --out_index;
 401       }
 402     }
 403
 404   // Shrink the vector to the size needed.
 405   output.resize(out_index);
 406
 407   // Put a terminator on the text string.
 408   output.push_back('\0');
 409 }
 410
 411 //----------------------------------------------------------------------------
 412 void cmExecuteProcessCommandAppend(std::vector<char>& output,
 413                                    const char* data, int length)
 414 {
 415 #if defined(__APPLE__)
 416   // HACK on Apple to work around bug with inserting at the
 417   // end of an empty vector.  This resulted in random failures
 418   // that were hard to reproduce.
 419   if(output.empty() && length > 0)
 420     {
 421     output.push_back(data[0]);
 422     ++data;
 423     --length;
 424     }
 425 #endif
 426   output.insert(output.end(), data, data+length);
 427 }