19 	close(fd[0]);  in close_pair()
20 	close(fd[1]);  in close_pair()
27 	close(fd);  in dup_devnull()
45 				close(cmd->out);  in start_command()
59 				close(cmd->in);  in start_command()
71 				close(cmd->in);  in start_command()
75 				close(cmd->out);  in start_command()
91 			close(cmd->in);  in start_command()
110 			close(cmd->out);  in start_command()
141 			close(cmd->in);  in start_command()
145 			close(cmd->out);  in start_command()
154 		close(fdin[0]);  in start_command()
156 		close(cmd->in);  in start_command()
159 		close(fdout[1]);  in start_command()
161 		close(cmd->out);  in start_command()
164 		close(fderr[1]);  in start_command()