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 <cstring>
   9 #include <cstdlib>
  10 #include <sys/wait.h>
  11 #include <msp/fs/dir.h>
  12 #include <msp/io/print.h>
  13 #include <msp/strings/utils.h>
  14 #include "builder.h"
  15 #include "externalaction.h"
  16
  17 using namespace std;
  18 using namespace Msp;
  19
  20 void ExternalAction::launch()
  21 {
  22         if(builder.get_verbose()>=2)
  23                 IO::print("%s\n", join(argv.begin(), argv.end()));
  24
  25         if(builder.get_dry_run())
  26                 pid=-1;
  27         else
  28         {
  29                 pid=fork();
  30                 if(pid==0)
  31                 {
  32                         char *argv_[argv.size()+1];
  33
  34                         unsigned j=0;
  35                         for(StringList::iterator i=argv.begin(); i!=argv.end(); ++i)
  36                                 argv_[j++]=strdup(i->c_str());
  37                         argv_[j]=0;
  38
  39                         if(!work_dir.empty())
  40                                 FS::chdir(work_dir);
  41                         execvp(argv_[0], argv_);
  42                         IO::print("Couldn't execute %s\n", argv.front());
  43                         exit(1);
  44                 }
  45                 else if(pid<0)
  46                         pid=0;
  47         }
  48 }
  49
  50 int ExternalAction::check()
  51 {
  52         if(builder.get_dry_run())
  53         {
  54                 signal_done.emit();
  55                 return 0;
  56         }
  57
  58         if(!pid)
  59                 return exit_code;
  60
  61         int status;
  62         if(waitpid(pid, &status, WNOHANG)==pid)
  63         {
  64                 signal_done.emit();
  65                 if(WIFEXITED(status))
  66                         exit_code=WEXITSTATUS(status);
  67                 else
  68                         exit_code=254;
  69                 pid=0;
  70                 return exit_code;
  71         }
  72         else
  73                 return -1;
  74 }