override_config_file(3alleg4)					  Allegro manual				     override_config_file(3alleg4)

NAME

       override_config_file - Specifies a file containing config overrides. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       void override_config_file(const char *filename);

DESCRIPTION

       Specifies  a file containing config overrides. These settings will be used in addition to the parameters in the main config file, and where
       a variable is present in both files this version will take priority. This can be used by application programmers to override  some  of  the
       config  settings from their code, while still leaving the main config file free for the end user to customise. For example, you could spec-
       ify a particular sample frequency and IBK instrument file, but the user could still use an `allegro.cfg' file to specify the port  settings
       and irq numbers.

       The override config file will not only take precedence when reading, but will also be used for storing values. When you are done with using
       the override config file, you can call override_config_file with a NULL parameter, so config data will be directly read	from  the  current
       config file again.

       Note:  The override file is completely independent from the current configuration. You can e.g. call set_config_file, and the override file
       will still be active. Also the flush_config_file function will only affect the current config file (which  can  be  changed  with  set_con-
       fig_file),  never  the  overriding one specified with this function. The modified override config is written back to disk whenever you call
       override_config_file.

       Example:

	  override_config_file("my.cfg");
	  /* This will read from my.cfg, and if it doesn't find a
	   * setting, will read from the current config file instead.
	   */
	  language = get_config_string("system", "language", NULL);
	  /* This will always write to my.cfg, no matter if the
	   * settings is already present or not.
	   */
	  set_config_string("system", "language", "RU");
	  /* This forces the changed setting to be written back to
	   * disk. Else it is written back at the next call to
	   * override_config_file, or when Allegro shuts down.
	   */
	  override_config_file(NULL);

       Note that this function and override_config_data() are mutually exclusive, i.e. calling one will cancel the effects of the other.

SEE ALSO

       override_config_data(3alleg4), set_config_file(3alleg4)

Allegro 							   version 4.4.2				     override_config_file(3alleg4)