# HG changeset patch
# User Timo Sirainen <tss@iki.fi>
# Date 1264179531 -7200
# Node ID 142c935e44d6928f5327aa408c03d2f2cf4e730d
# Parent  2a7efac8933927a6fc022c93e4bfc7a3155360f3
dovecot -a|-n: Log a warning if Dovecot was last started using a different config file.

diff -r 2a7efac89339 -r 142c935e44d6 src/master/main.c
--- a/src/master/main.c	Fri Jan 22 17:06:57 2010 +0200
+++ b/src/master/main.c	Fri Jan 22 18:58:51 2010 +0200
@@ -193,7 +193,7 @@
 	/* see if hostname changed */
 	hostpid_init();
 
-	if (!master_settings_read(configfile, FALSE, FALSE))
+	if (!master_settings_read(configfile, FALSE, FALSE, FALSE))
 		i_warning("Invalid configuration, keeping old one");
 	else {
 		if (!IS_INETD())
@@ -309,6 +309,8 @@
 
 static void main_init(bool log_error)
 {
+	const char *base_config_path;
+
 	drop_capabilities();
 
 	/* deny file access from everyone else except owner */
@@ -348,6 +350,13 @@
 
 	create_pid_file(t_strconcat(settings_root->defaults->base_dir,
 				    "/master.pid", NULL));
+	base_config_path = t_strconcat(settings_root->defaults->base_dir,
+				       "/"PACKAGE".conf", NULL);
+	(void)unlink(base_config_path);
+	if (symlink(configfile, base_config_path) < 0) {
+		i_error("symlink(%s, %s) failed: %m",
+			configfile, base_config_path);
+	}
 }
 
 static void main_deinit(void)
@@ -518,6 +527,7 @@
 	const char *exec_protocol = NULL, **exec_args = NULL, *user, *home;
 	bool foreground = FALSE, ask_key_pass = FALSE, log_error = FALSE;
 	bool dump_config = FALSE, dump_config_nondefaults = FALSE;
+	bool config_path_given = FALSE;
 	int i;
 
 #ifdef DEBUG
@@ -538,6 +548,7 @@
 			i++;
 			if (i == argc) i_fatal("Missing config file argument");
 			configfile = argv[i];
+			config_path_given = TRUE;
 		} else if (strcmp(argv[i], "-n") == 0) {
 			dump_config_nondefaults = dump_config = TRUE;
 		} else if (strcmp(argv[i], "-p") == 0) {
@@ -579,7 +590,6 @@
 	}
 
 	if (dump_config) {
-
 		/* print the config file path before parsing it, so in case
 		   of errors it's still shown */
 		printf("# "VERSION": %s\n", configfile);
@@ -589,7 +599,8 @@
 	T_BEGIN {
 		master_settings_init();
 		if (!master_settings_read(configfile, exec_protocol != NULL,
-					  dump_config || log_error))
+					  dump_config || log_error,
+					  !config_path_given))
 			i_fatal("Invalid configuration in %s", configfile);
 	} T_END;
 
diff -r 2a7efac89339 -r 142c935e44d6 src/master/master-settings.c
--- a/src/master/master-settings.c	Fri Jan 22 17:06:57 2010 +0200
+++ b/src/master/master-settings.c	Fri Jan 22 18:58:51 2010 +0200
@@ -1545,7 +1545,28 @@
 #endif
 }
 
-bool master_settings_read(const char *path, bool nochecks, bool nofixes)
+static void check_wrong_config(struct settings_parse_ctx *ctx, const char *path)
+{
+	const char *base_dir = PKG_RUNDIR;
+	char prev_path[PATH_MAX];
+	int ret;
+
+	if (ctx->root != NULL && ctx->root->defaults != NULL)
+		base_dir = ctx->root->defaults->base_dir;
+	ret = readlink(t_strconcat(base_dir, "/"PACKAGE".conf", NULL),
+		       prev_path, sizeof(prev_path)-1);
+	if (ret < 0 || ret == sizeof(prev_path)-1)
+		return;
+	prev_path[ret] = '\0';
+
+	if (strcmp(prev_path, path) != 0) {
+		i_warning("Dovecot was last started using %s, "
+			  "but this config is %s", prev_path, path);
+	}
+}
+
+bool master_settings_read(const char *path, bool nochecks, bool nofixes,
+			  bool warn_wrong_config)
 {
 	struct settings_parse_ctx ctx;
 	struct server_settings *server, *prev;
@@ -1553,6 +1574,7 @@
 	struct auth_settings *auth;
 	struct namespace_settings *ns;
 	pool_t temp;
+	bool ret;
 
 	memset(&ctx, 0, sizeof(ctx));
 
@@ -1565,7 +1587,10 @@
 				  &default_settings, &default_settings);
 	ctx.auth = &ctx.server->auth_defaults;
 
-	if (!settings_read(path, NULL, parse_setting, parse_section, &ctx))
+	ret = settings_read(path, NULL, parse_setting, parse_section, &ctx);
+	if (warn_wrong_config)
+		check_wrong_config(&ctx, path);
+	if (!ret)
 		return FALSE;
 
 	if (ctx.level != 0) {
diff -r 2a7efac89339 -r 142c935e44d6 src/master/master-settings.h
--- a/src/master/master-settings.h	Fri Jan 22 17:06:57 2010 +0200
+++ b/src/master/master-settings.h	Fri Jan 22 18:58:51 2010 +0200
@@ -268,7 +268,8 @@
 
 extern struct server_settings *settings_root;
 
-bool master_settings_read(const char *path, bool nochecks, bool nofixes);
+bool master_settings_read(const char *path, bool nochecks, bool nofixes,
+			  bool warn_wrong_config);
 
 void master_settings_dump(struct server_settings *set, bool nondefaults);