source/externalaction.cpp

   1 /* $Id$
   2
   3 This file is part of builder
   4 Copyright © 2006-2009  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include <sys/wait.h>
   9 #include <iostream>
  10 #include <cstring>
  11 #include <cstdlib>
  12 #include <msp/fs/dir.h>
  13 #include "builder.h"
  14 #include "externalaction.h"
  15
  16 using namespace std;
  17 using namespace Msp;
  18
  19 void ExternalAction::launch()
  20 {
  21         if(builder.get_verbose()>=2)
  22         {
  23                 for(StringList::const_iterator i=argv.begin(); i!=argv.end(); ++i)
  24                 {
  25                         if(i!=argv.begin())
  26                                 cout<<' ';
  27                         cout<<*i;
  28                 }
  29                 cout<<'\n';
  30         }
  31
  32         if(builder.get_dry_run())
  33                 pid=-1;
  34         else
  35         {
  36                 pid=fork();
  37                 if(pid==0)
  38                 {
  39                         char *argv_[argv.size()+1];
  40
  41                         unsigned j=0;
  42                         for(StringList::iterator i=argv.begin(); i!=argv.end(); ++i)
  43                                 argv_[j++]=strdup(i->c_str());
  44                         argv_[j]=0;
  45
  46                         if(!work_dir.empty())
  47                                 FS::chdir(work_dir);
  48                         execvp(argv_[0], argv_);
  49                         cout<<"Couldn't execute "<<argv.front()<<'\n';
  50                         exit(1);
  51                 }
  52                 else if(pid<0)
  53                         pid=0;
  54         }
  55 }
  56
  57 int ExternalAction::check()
  58 {
  59         if(builder.get_dry_run())
  60         {
  61                 signal_done.emit();
  62                 return 0;
  63         }
  64
  65         if(!pid)
  66                 return exit_code;
  67
  68         int status;
  69         if(waitpid(pid, &status, WNOHANG)==pid)
  70         {
  71                 signal_done.emit();
  72                 if(WIFEXITED(status))
  73                         exit_code=WEXITSTATUS(status);
  74                 else
  75                         exit_code=254;
  76                 pid=0;
  77                 return exit_code;
  78         }
  79         else
  80                 return -1;
  81 }