===================================================================
RCS file: /cvsrepo/anoncvs/cvs/src/usr.bin/tmux/cfg.c,v
retrieving revision 1.75
retrieving revision 1.76
diff -u -r1.75 -r1.76
--- src/usr.bin/tmux/cfg.c	2019/06/20 06:51:36	1.75
+++ src/usr.bin/tmux/cfg.c	2019/12/10 14:22:15	1.76
@@ -1,4 +1,4 @@
-/* $OpenBSD: cfg.c,v 1.75 2019/06/20 06:51:36 nicm Exp $ */
+/* $OpenBSD: cfg.c,v 1.76 2019/12/10 14:22:15 nicm Exp $ */
 
 /*
  * Copyright (c) 2008 Nicholas Marriott <nicholas.marriott@gmail.com>
@@ -67,12 +67,45 @@
 	cfg_file = xstrdup(path);
 }
 
+static char *
+expand_cfg_file(const char *path, const char *home)
+{
+	char			*expanded, *name;
+	const char		*end;
+	struct environ_entry	*value;
+
+	if (strncmp(path, "~/", 2) == 0) {
+		if (home == NULL)
+			return (NULL);
+		xasprintf(&expanded, "%s%s", home, path + 1);
+		return (expanded);
+	}
+
+	if (*path == '$') {
+		end = strchr(path, '/');
+		if (end == NULL)
+			name = xstrdup(path + 1);
+		else
+			name = xstrndup(path + 1, end - path - 1);
+		value = environ_find(global_environ, name);
+		free(name);
+		if (value == NULL)
+			return (NULL);
+		if (end == NULL)
+			end = "";
+		xasprintf(&expanded, "%s%s", value->value, end);
+		return (expanded);
+	}
+
+	return (xstrdup(path));
+}
+
 void
 start_cfg(void)
 {
-	const char	*home;
-	int		 flags = 0;
+	const char	*home = find_home();
 	struct client	*c;
+	char		*path, *copy, *next, *expanded;
 
 	/*
 	 * Configuration files are loaded without a client, so commands are run
@@ -90,15 +123,21 @@
 		cmdq_append(c, cfg_item);
 	}
 
-	if (cfg_file == NULL)
-		load_cfg(TMUX_CONF, c, NULL, CMD_PARSE_QUIET, NULL);
-
-	if (cfg_file == NULL && (home = find_home()) != NULL) {
-		xasprintf(&cfg_file, "%s/.tmux.conf", home);
-		flags = CMD_PARSE_QUIET;
-	}
-	if (cfg_file != NULL)
-		load_cfg(cfg_file, c, NULL, flags, NULL);
+	if (cfg_file == NULL) {
+		path = copy = xstrdup(TMUX_CONF);
+		while ((next = strsep(&path, ":")) != NULL) {
+			expanded = expand_cfg_file(next, home);
+			if (expanded == NULL) {
+				log_debug("couldn't expand %s", next);
+				continue;
+			}
+			log_debug("expanded %s to %s", next, expanded);
+			load_cfg(expanded, c, NULL, CMD_PARSE_QUIET, NULL);
+			free(expanded);
+		}
+		free(copy);
+	} else
+		load_cfg(cfg_file, c, NULL, 0, NULL);
 
 	cmdq_append(NULL, cmdq_get_callback(cfg_done, NULL));
 }