Understanding source code
 

Hi
I want to read the source code of firestarter firewall. I can't understand the meaning and syntax of the below line:

FIRESTARTER_RULES_DIR "/firestarter"

it use in many places in code such as this instruction:

g_spawn_sync (FIRESTARTER_RULES_DIR "/firestarter",
arg, NULL,
G_SPAWN_STDERR_TO_DEV_NULL,
NULL, NULL,
&output,NULL,&retval, &error)

please help me
thanks

Just guessing...
It looks like this: is a variable that gets set somewhere, and is perhaps the path. Thus, the expression would decode to--e.g.-- /usr/share/firestarter.

It will help if you know what the function "g_spawn_sync" does.

In that case, you will probably see a line like this elsewhere:

#define FIRESTARTER_RULES_DIR "/blah/blah/blah"

When the preprocessor runs through the code and sees this:
g_spawn_sync (FIRESTARTER_RULES_DIR "/firestarter",

It will expand the variable FIRESTARTER_RULES_DIR to obtain:
g_spawn_sync ("/blah/blah/blah" "/firestarter",

which is equivalent to:
g_spawn_sync ("/blah/blah/blah/firestarter",

So 'FIRESTARTER_RULES_DIR' is simply a directory path; presumably it holds rules for firestarter.

thanks for your help