Add an ACL list for users connecting to the tmux socket. Users may be

forbidden from attaching, forced to attach read-only, or allowed to
attach read-write. A new command, server-access, configures the list.
tmux gets the user using getpeereid(3) of the client socket. Users must
still configure file system permissions manually. From Dallas Lyons and
others.

1 files changed, 2 insertions, 1 deletions

diff --git a/cmd-attach-session.c b/cmd-attach-session.c
index cc795b22..b92a7f2b 100644
--- a/cmd-attach-session.c
+++ b/cmd-attach-session.c
@@ -43,7 +43,7 @@ const struct cmd_entry cmd_attach_session_entry = {
 
 	/* -t is special */
 
-	.flags = CMD_STARTSERVER,
+	.flags = CMD_STARTSERVER|CMD_READONLY,
 	.exec = cmd_attach_session_exec
 };
 
@@ -69,6 +69,7 @@ cmd_attach_session(struct cmdq_item *item, const char *tflag, int dflag,
 
 	if (c == NULL)
 		return (CMD_RETURN_NORMAL);
+
 	if (server_client_check_nested(c)) {
 		cmdq_error(item, "sessions should be nested with care, "
 		    "unset $TMUX to force");