source/externalaction.cpp

   1 #include <sys/wait.h>
   2 #include <msp/iter.h>
   3 #include "builder.h"
   4 #include "externalaction.h"
   5
   6 using namespace std;
   7 using namespace Msp;
   8
   9 int ExternalAction::check()
  10 {
  11         if(!pid)
  12                 return 255;
  13
  14         int status;
  15         if(waitpid(pid, &status, WNOHANG)==pid)
  16         {
  17                 signal_done.emit();
  18                 if(WIFEXITED(status))
  19                         return WEXITSTATUS(status);
  20                 else
  21                         return 254;
  22         }
  23         else
  24                 return -1;
  25 }
  26
  27 void ExternalAction::launch()
  28 {
  29         if(builder.get_verbose()>=1)
  30         {
  31                 for(list<string>::const_iterator i=argv.begin(); i!=argv.end(); ++i)
  32                 {
  33                         if(i!=argv.begin())
  34                                 cout<<' ';
  35                         cout<<*i;
  36                 }
  37                 cout<<'\n';
  38         }
  39
  40         pid=fork();
  41         if(pid==0)
  42         {
  43                 char *argv_[argv.size()+1];
  44                 for(CountingIterator<string, list<string>::iterator> i=argv.begin(); i!=argv.end(); ++i)
  45                         argv_[i.count()]=strdup(i->c_str());
  46                 argv_[argv.size()]=0;
  47                 execvp(argv_[0], argv_);
  48                 exit(1);
  49         }
  50         else if(pid<0)
  51                 pid=0;
  52 }