Re: file-format-problem?

[anuradha arora <anuradhampls yahoo com>]

i am using mutex, and dont think there is a problem
there.....

--- Harring Figueiredo <harringf yahoo com> wrote:
>  Wha tis the machanism to lock the file (fcntl ?
> mutex ?)
>
> Harring
> --- anuradha arora <anuradhampls yahoo com> wrote:
> > hi,
> > i cant seem to figure this out...
> >
> > i have a file which is written to (append mode)
> using
> > fwrite, from a c program, which spawns the gtk-gui
> as
> > a seperate thread. there is a gtk_timeout_add 
> > function in the gui which reads the file using
> fread.
> > I do have locks to protect the file.
> >
> > The problem is that the text widget does not
> accept
> > and display the data read from the file, it
> crashes
> > with a segmentation fault.
> >
> > And when i open the file to have a look at the
> > contents, i see unreadable symbols. 
> >
> > On the other hand, if i create the file myself
> with an
> > editer, with readable data, and disable the file
> > creation through the program, that also works
> fine. 
> > Also passing my own string to the text widget at
> the
> > last stage when i have to display is also fine, no
> > crash.
> >
> > I cant understand, is there some problem with the
> way
> > i am writing to the file? i write with fwrite and
> put
> > unsigned long data and read it with char (byte
> > wise),after a certain no of unsigned long reads.
> Why
> > is there a problem in displaying that char data? 
> >
> > Maybe this is more a general question, but also
> why is
> > the file not in a readable form when i open and
> see
> > it?
> >
> > thanks in advance,
> > regards,
> > anuradha.
> >
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> =====
> "We should do smart things with stupid technology
> before we do stupid 
> things with smart technology."
>                               --Bill Buxton, Alias
> Research
>
>
> Harring Figueiredo
>
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