tests: Don't globally set tmux default-shell

run_term() uses tmux set-option -g to globally set the default shell.
Unfortunately this hits a chicken-and-egg problem that's common with many
of tmux's session options.  If there isn't already a tmux server running,
we can't connect to set the option.  If we attempt this after starting our
session (and therefore the server), then the session will already be
started with the previous default shell.

In any case it's not a good idea to set tmux global options, since that
might interfere with whatever else the user is doing in tmux.  So, instead
set the default-shell option locally to the session after starting it.  To
make sure we get the right shell for our initial script, explicitly invoke
/bin/sh to interpret it.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

1 files changed, 7 insertions, 6 deletions

diff --git a/test/lib/term b/test/lib/term
index 42b0020..7dd9826 100755
--- a/test/lib/term
+++ b/test/lib/term
@@ -542,26 +542,25 @@ pause_continue() {
 
 # run_term() - Start tmux session, running entry point, with recording if needed
 run_term() {
-	export SHELL="/bin/sh"
-	tmux set-option -g default-shell "/bin/sh"
-
 	TMUX="tmux new-session -s passt_test -ePCAP=$PCAP -eDEBUG=$DEBUG"
 
 	if [ ${CI} -eq 1 ]; then
 		printf '\e[8;50;240t'
-		asciinema rec --overwrite ci.uncut -c "$TMUX ./ci from_term"
+		asciinema rec --overwrite ci.uncut -c "$TMUX /bin/sh -c './ci from_term'"
 		video_postprocess ci.uncut
 	elif [ ${DEMO} -eq 1 ]; then
 		printf '\e[8;40;130t'
-		asciinema rec --overwrite demo.uncut -c "$TMUX ./run_demo from_term"
+		asciinema rec --overwrite demo.uncut -c "$TMUX /bin/sh -c './run_demo from_term'"
 		video_postprocess demo.uncut
 	else
-		$TMUX ./run from_term
+		$TMUX /bin/sh -c './run from_term'
 	fi
 }
 
 # term() - Set up terminal window and panes for regular tests or CI
 term() {
+	tmux set-option default-shell "/bin/sh"
+
 	tmux set status-interval 1
 	tmux rename-window ''
 
@@ -596,6 +595,8 @@ term() {
 
 # term_demo() - Set up terminal window and panes for demo
 term_demo() {
+	tmux set-option default-shell "/bin/sh"
+
 	tmux set status-interval 1
 	tmux rename-window ''