imsg closes the fd after sending, so dup() STDIN_FILENO before passing it to

the parent, otherwise TIOCGWINSZ will fail when the window is resized (that
could actually be moved into the server but this is more future-proof and
avoids breaking the protocol).

1 files changed, 3 insertions, 2 deletions

diff --git a/client.c b/client.c
index 0bbe6056..359d9482 100644
--- a/client.c
+++ b/client.c
@@ -44,7 +44,7 @@ client_init(char *path, struct client_ctx *cctx, int cmdflags, int flags)
 	struct msg_identify_data	data;
 	struct winsize			ws;
 	size_t				size;
-	int				fd, mode;
+	int				fd, fd2, mode;
 	char			       *name, *term;
 	char		 		rpathbuf[MAXPATHLEN];
 
@@ -119,8 +119,9 @@ server_started:
 		if (strlcpy(data.tty, name, sizeof data.tty) >= sizeof data.tty)
 			fatalx("ttyname failed");
 
+		fd2 = dup(STDIN_FILENO);
 		imsg_compose(&cctx->ibuf, MSG_IDENTIFY,
-		    PROTOCOL_VERSION, -1, STDIN_FILENO, &data, sizeof data);
+		    PROTOCOL_VERSION, -1, fd2, &data, sizeof data);
 	}
 
 	return (0);