source/externalaction.cpp

   1 /* $Id$
   2
   3 This file is part of builder
   4 Copyright © 2006-2007 Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include <sys/wait.h>
   9 #include <iostream>
  10 #include "builder.h"
  11 #include "externalaction.h"
  12
  13 using namespace std;
  14 using namespace Msp;
  15
  16 int ExternalAction::check()
  17 {
  18         if(builder.get_dry_run())
  19         {
  20                 signal_done.emit();
  21                 return 0;
  22         }
  23
  24         if(!pid)
  25                 return exit_code;
  26
  27         int status;
  28         if(waitpid(pid, &status, WNOHANG)==pid)
  29         {
  30                 signal_done.emit();
  31                 if(WIFEXITED(status))
  32                         exit_code=WEXITSTATUS(status);
  33                 else
  34                         exit_code=254;
  35                 pid=0;
  36                 return exit_code;
  37         }
  38         else
  39                 return -1;
  40 }
  41
  42 /**
  43 Starts the external program.  Fill in argv before calling this.
  44 */
  45 void ExternalAction::launch()
  46 {
  47         if(builder.get_verbose()>=2)
  48         {
  49                 for(StringList::const_iterator i=argv.begin(); i!=argv.end(); ++i)
  50                 {
  51                         if(i!=argv.begin())
  52                                 cout<<' ';
  53                         cout<<*i;
  54                 }
  55                 cout<<'\n';
  56         }
  57
  58         if(builder.get_dry_run())
  59                 pid=-1;
  60         else
  61         {
  62                 pid=fork();
  63                 if(pid==0)
  64                 {
  65                         char *argv_[argv.size()+1];
  66
  67                         unsigned j=0;
  68                         for(StringList::iterator i=argv.begin(); i!=argv.end(); ++i)
  69                                 argv_[j++]=strdup(i->c_str());
  70                         argv_[j]=0;
  71
  72                         execvp(argv_[0], argv_);
  73                         cout<<"Couldn't execute "<<argv.front()<<'\n';
  74                         exit(1);
  75                 }
  76                 else if(pid<0)
  77                         pid=0;
  78         }
  79 }