Function tr2_sysenv_get

trace2/tr2_sysenv.c:103–118

* Return the value for the requested Trace2 setting from these sources: * the system config, the global config, and the environment. */

 * the system config, the global config, and the environment.
 */
const char *tr2_sysenv_get(enum tr2_sysenv_variable var)
{
	if (var >= TR2_SYSENV_MUST_BE_LAST)
		BUG("tr2_sysenv_get invalid var '%d'", var);

	if (!tr2_sysenv_settings[var].getenv_called) {
		const char *v = getenv(tr2_sysenv_settings[var].env_var_name);
		if (v && *v) {
			free(tr2_sysenv_settings[var].value);
			tr2_sysenv_settings[var].value = xstrdup(v);
		}
		tr2_sysenv_settings[var].getenv_called = 1;
	}

	return tr2_sysenv_settings[var].value;
}

/*
 * Return a friendly name for this setting that is suitable for printing