Re: fgets difference octave to c

[Uwe Damm]

you saved my weekend:-)

fclear(fd) did the job!

Uwe


Am 22.02.19 um 18:58 schrieb "Markus Mützel":
> On 22 Feb 2019 06:28:44 -0600 (CST) "uwedamm" wrote:
> > I try to read data from a text-file using fopen/fgets, which is written in
> > some other process.
> > If I do that in c, data, which is written by the other process can be read:
> > while(1)
> > {
> >      if(fgets(buf,100,fp))
> >          printf("%s\n",buf);
> > }
> >
> > If I do that in octave, only data which was written before starting the
> > octave script is read, after that no new data is available and the fgets
> > continuously returns -1:
> > while (1)
> >      ln=fgets(fd,100);
> >      if(ln ~= -1)
> >          disp(ln);
> >          fflush(stdout);
> >      end
> > end
> >
> > How can I proceed to continuously read data from the other process (like
> > e.g. in tail)?
> I am not sure whether this will help, but you could try calling fclear(fd) 
> after each time you reached eof. This should essentially call ios::clear on the 
> stream:
> http://www.cplusplus.com/reference/ios/ios/clear/
>
> Markus