Re: Coding a console program frontend

["Ardhan Madras" <ajhwb knac com>]

Hi,

> However the child proccess (the GUI) when tries to read data from the pipe
> it hangs. If you run this program you can see that the printf( "BEFORE READ
> LINE\n" ) is printed but the printf( "AFTER READ LINE\n" ) is not..

> What I'm doing wrong?

What do you means with *hang*? or it's being unresponsive?, the g_io_channel_* family functions use a 
GIOFuncs, defined at giochannel.h each for it's I/O operation, with g_io_channel_read_line you can see they 
are basically a read() syscall wrapper, see g_io_unix_read in giounix.c. In blocking state. You can't see 
printf("AFTER LINE\n") because g_io_channel_read_line is blocking your process and also it's GTK+ main loop, 
with blocked main loop, your GUI is being unresponsive and not updated through it's main loop.

With g_io_channel_read_line you have to make sure the sender send a terminating character, because it will 
read until the terminating character reached, and maybe this made the block. Why not try with 
g_io_channel_read_chars? you can try to set number of bytes to read there? ... a simple debug heh ;)

                       - Ardhan


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