rem: if (pipe(to_child_pipe) < 0 || pipe(from_child_pipe) < 0) {
add: if (fd_pair(to_child_pipe) < 0 || fd_pair(from_child_pipe) < 0) {
context: int piped_child(char **command,int *f_in,int *f_out){  int pid;  int to_child_pipe[2];  int from_child_pipe[2];  if (pipe(to_child_pipe) < 0 ||      pipe(from_child_pipe) < 0) {    rprintf(FERROR,"pipe: %s\n",strerror(errno));    exit_cleanup(RERR_IPC);  }  pid = do_fork();  if (pid < 0) {    rprintf(FERROR,"fork: %s\n",strerror(errno));    exit_cleanup(RERR_IPC);  }  if (pid == 0)    {      extern int orig_umask;      if (dup2(to_child_pipe[0], STDIN_FILENO) < 0 ||	  close(to_child_pipe[1]) < 0 ||	  close(from_child_pipe[0]) < 0 ||	  dup2(from_child_pipe[1], STDOUT_FILENO) < 0) {	rprintf(FERROR,"Failed to dup/close : %s\n",strerror(errno));	exit_cleanup(RERR_IPC);      }      if (to_child_pipe[0] != STDIN_FILENO) close(to_child_pipe[0]);      if (from_child_pipe[1] != STDOUT_FILENO) close(from_child_pipe[1]);      umask(orig_umask);      execvp(command[0], command);      rprintf(FERROR,"Failed to exec %s : %s\n",	      command[0],strerror(errno));      exit_cleanup(RERR_IPC);    }  if (close(from_child_pipe[1]) < 0 ||      close(to_child_pipe[0]) < 0) {    rprintf(FERROR,"Failed to close : %s\n",strerror(errno));       exit_cleanup(RERR_IPC);  }  *f_in = from_child_pipe[0];  *f_out = to_child_pipe[1];  return pid;}