source/externalaction.cpp

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