Re: fgets differ in C and octave?

[Andreas Weber]

Am 22.02.19 um 17:23 schrieb Andreas Weber:
> Am 22.02.19 um 14:26 schrieb uwedamm:
> > If the last line was read, fgets only reports "-1", even if new data is
> > written to the file by the other process.
>
> I believe what you see, is that fgets geturns -1 as soon as there is no 
> more data to read. If you've encountered this condition, you have to clear the error state 
> with "fclear(fid)"

A more complete example:

Open a shell and run
ping 8.8.8.8 > foo.bar

then in GNU Octave:

fid = fopen ("foo.bar", "r");
if (fid < 0)
  error ("no foo.bar found...")

else

  while (1)

    f = fgetl (fid)

    if (f < 0)
      pause (0.2);
      fclear (fid)
    endif

  endwhile

  fclose (fid)

endif

HTH, Andy