189 get_next_out (FILE **descriptors, int nfiles, int idx)  in get_next_out()  argument
192     if (descriptors[idx])  in get_next_out()
201 fail_output (FILE **descriptors, char **files, int i)  in fail_output()  argument
207   if (descriptors[i] == stdout)  in fail_output()
215   descriptors[i] = nullptr;  in fail_output()
228   FILE **descriptors;  in tee_files()  local
247   descriptors = xnmalloc (nfiles + 1, sizeof *descriptors);  in tee_files()
251   descriptors[0] = stdout;  in tee_files()
253     out_pollable[0] = iopoll_output_ok (fileno (descriptors[0]));  in tee_files()
261        descriptors[i] = fopen (files[i], mode_string);  in tee_files()
262       if (descriptors[i] == nullptr)  in tee_files()
274             out_pollable[i] = iopoll_output_ok (fileno (descriptors[i]));  in tee_files()
275           setvbuf (descriptors[i], nullptr, _IONBF, 0);  in tee_files()
285           int err = iopoll (STDIN_FILENO, fileno (descriptors[first_out]),  in tee_files()
292               if (fail_output (descriptors, files, first_out))  in tee_files()
295               first_out = get_next_out (descriptors, nfiles, first_out);  in tee_files()
314         if (descriptors[i]  in tee_files()
315             && ! fwrite_wait (buffer, bytes_read, descriptors[i]))  in tee_files()
317             if (fail_output (descriptors, files, i))  in tee_files()
321               first_out = get_next_out (descriptors, nfiles, first_out);  in tee_files()
333     if (descriptors[i] && ! fclose_wait (descriptors[i]))  in tee_files()
339   free (descriptors);  in tee_files()