Re: redirecting output to a file with g_spawn_async

[Olivier Sessink <lists olivier pk wau nl>]

Colossus wrote:

> > > I tried with g_spawn_async_with_pipes and with gspawn_async
> > > but it does not work. In the first case the output (the decompressed
> > > bzip2 file) is redirected to a GTK window so I used g_spawn_async (no
> > > pipes) but the output is directed to the shell window from which I ran
> > > my program. How can I have the output redirected to the file /mnt/foo ?

> > open a file in write mode, and while reading from the pipe from
> > _spawn_async, write data to that file.

> I did it but the file written is not the same as the original !
> I opened with fwrite with "w" since wb does not care on Unix.
> I read the data from the pipe in a gchar *line with and write it to the
> file with fwrite ( line , 1 , strlen ( line ), fd ) but the dimension of
> the written file are not the same of the one extracted
> with bzip2 -d file.bz2 and it corrupteded. Where am I wrong ?

The only thing I can think of: are you keeping track of the number of
bytes, or do you rely on a '\0' as end-of-string? If your data is
binary, you cannot rely on the end-of-string, you have to keep track of
the number of bytes.

Try replacing the bzip2 with 'cat', and then test your code, much easier
for debugging. Start with a simple file with a single character or so.

regards,
        Olivier