[En-Nut-Discussion] Question about CGI

[Ole Reinhardt]

Hi,

> Everything works fine exept one thing: when I open webpage (with image 
> from my cam) and then hit reload button before file transfer is 
> finished, NutOS restarts.
> Why is it so ? Can anybody give me a hint please ? I thought that 
> writing to a stream in a loop using fputc() can't be interrupted.
> Here is the cgi function that reads image from usart:

Mostly a NutOS restarts results from a buffer overflow or any other
invalid pointer access. Also this might happen if you try to access an
invalid file descriptor.

Just an idea: Could it be possible that you browser closes the
connection before you have transfered the whole file and you don't check
this condition in your code? Could also be a problem in one of your
mca25 functions? Perhaps they are not reentrant? (another cgi thread is
started before the other one has finished?)

Best regards,

Ole Reinhardt


-- 
kernel concepts    Tel: +49-271-771091-14
Dreisbachstr. 24   Fax: +49-271-771091-19
D-57250 Netphen    E+ : +49-177-7420433
--