Support -c like sh(1) to execute a command, useful when tmux is a login

shell. Suggested by halex@.

This includes another protocol version increase (the last for now) so again
restart the tmux server before upgrading.

1 files changed, 2 insertions, 0 deletions

diff --git a/client.c b/client.c
index ceb054bb..e93272de 100644
--- a/client.c
+++ b/client.c
@@ -91,6 +91,8 @@ server_started:
 		fatal("fcntl failed");
 	if (fcntl(fd, F_SETFL, mode|O_NONBLOCK) == -1)
 		fatal("fcntl failed");
+	if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
+		fatal("fcntl failed");
 	imsg_init(&cctx->ibuf, fd);
 
 	if (cmdflags & CMD_SENDENVIRON)