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(builder.get_dry_run())
  12         {
  13                 signal_done.emit();
  14                 return 0;
  15         }
  16
  17         if(!pid)
  18                 return 255;
  19
  20         int status;
  21         if(waitpid(pid, &status, WNOHANG)==pid)
  22         {
  23                 signal_done.emit();
  24                 if(WIFEXITED(status))
  25                         exit_code=WEXITSTATUS(status);
  26                 else
  27                         exit_code=254;
  28                 return exit_code;
  29         }
  30         else
  31                 return -1;
  32 }
  33
  34 void ExternalAction::launch()
  35 {
  36         if(builder.get_verbose()>=2)
  37         {
  38                 for(list<string>::const_iterator i=argv.begin(); i!=argv.end(); ++i)
  39                 {
  40                         if(i!=argv.begin())
  41                                 cout<<' ';
  42                         cout<<*i;
  43                 }
  44                 cout<<'\n';
  45         }
  46
  47         if(builder.get_dry_run())
  48                 pid=-1;
  49         else
  50         {
  51                 pid=fork();
  52                 if(pid==0)
  53                 {
  54                         char *argv_[argv.size()+1];
  55                         for(CountingIterator<string, list<string>::iterator> i=argv.begin(); i!=argv.end(); ++i)
  56                                 argv_[i.count()]=strdup(i->c_str());
  57                         argv_[argv.size()]=0;
  58                         execvp(argv_[0], argv_);
  59                         exit(1);
  60                 }
  61                 else if(pid<0)
  62                         pid=0;
  63         }
  64 }