[9fans] exit message

[arisawa@ar.aichi-u.ac.jp]

Hello,

Do we have any way to find exit message of child process in the  
following case?
That is, parent waits child to finish by reading output of child  
process.

         Biobuf ib;
         int fd[2];
         pipe(fd);
         switch(fork()){
         case -1:
                 return -1;
         case 0:
                 dup(fd[1], 1);
                 dup(fd[1], 2);
                 close(fd[1]);
                 exec(path, argv);
         default:
                 close(fd[1]);
                 break;
         }

         Binit(&ib, fd[0], OREAD);
         while((p = Brdstr(&ib,'\n',1))){
                 ...
         }
	/* how to find exit message of child process here? */

Kenji Arisawa