com32/lib/sys/screensize.c

   1 #include <unistd.h>
   2 #include <errno.h>
   3 #include "file.h"
   4
   5 int getscreensize(int fd, int *rows, int *cols)
   6 {
   7     struct file_info *fp = &__file_info[fd];
   8
   9     if (fd >= NFILES || !fp->iop) {
  10         errno = EBADF;
  11         return -1;
  12     }
  13
  14     *rows = fp->o.rows;
  15     *cols = fp->o.cols;
  16
  17     if (!*rows || !*cols) {
  18         errno = ENOTTY;
  19         return -1;
  20     }
  21
  22     return 0;
  23 }