Add autosystemname setting to asterisk.conf

When enabled, it will set the systemname to be the hostname of the system

Issue 9713, patch by Juggie - slightly modified by me, to "failover" to localhost


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@63967 65c4cc65-6c06-0410-ace0-fbb531ad65f3

Makefile

@@ -545,6 +545,7 @@ samples: adsi
 		echo ";[options]" ; \
 		echo ";internal_timing = yes" ; \
 		echo ";systemname = my_system_name ; prefix uniqueid with a system name for global uniqueness issues" ; \
+		echo ";autosystemname = yes ; automatically set systemname to hostname - uses 'localhost' on failure" ; \
 		echo "; Changing the following lines may compromise your security." ; \
 		echo ";[files]" ; \
 		echo ";astctlpermissions = 0660" ; \

main/asterisk.c

@@ -2374,6 +2374,7 @@ static void ast_readconfig(void)
 	struct ast_config *cfg;
 	struct ast_variable *v;
 	char *config = AST_CONFIG_FILE;
+	char hostname[MAXHOSTNAMELEN] = "";
 
 	if (ast_opt_override_config) {
 		cfg = ast_config_load(ast_config_AST_CONFIG_FILE);
@@ -2523,6 +2524,15 @@ static void ast_readconfig(void)
 			ast_copy_string(ast_config_AST_RUN_GROUP, v->value, sizeof(ast_config_AST_RUN_GROUP));
 		} else if (!strcasecmp(v->name, "systemname")) {
 			ast_copy_string(ast_config_AST_SYSTEM_NAME, v->value, sizeof(ast_config_AST_SYSTEM_NAME));
+		} else if (!strcasecmp(v->name, "autosystemname")) {
+			if (ast_true(v->value)) {
+				if (!gethostname(hostname, sizeof(hostname) - 1))
+					ast_copy_string(ast_config_AST_SYSTEM_NAME, hostname, sizeof(ast_config_AST_SYSTEM_NAME));
+				else {
+					ast_log(LOG_ERROR, "Cannot obtain hostname for this system.  Using 'localhost' instead.\n");
+					ast_copy_string(ast_config_AST_SYSTEM_NAME, "localhost", sizeof(ast_config_AST_SYSTEM_NAME));
+				}
+			}
 		} else if (!strcasecmp(v->name, "languageprefix")) {
 			ast_language_is_prefix = ast_true(v->value);
 #if defined(HAVE_SYSINFO)