Don't load and save history if not on a tty

If jimsh is run in interactive mode but without a tty,
don't bother to load and save line editing history.

Signed-off-by: Steve Bennett <steveb@workware.net.au>

1 files changed, 2 insertions, 1 deletions

diff --git a/auto.def b/auto.def
index c1e24ef..eb2f892 100644
--- a/auto.def
+++ b/auto.def
@@ -138,10 +138,11 @@ if {[opt-bool ipv6 full]} {
     msg-result "Enabling IPv6"
     define JIM_IPV6
 }
-if {[opt-bool lineedit full] && [cc-check-includes termios.h]} {
+if {[opt-bool lineedit full] && [cc-check-includes termios.h] && [cc-check-functions isatty]} {
     msg-result "Enabling line editing"
     define USE_LINENOISE
     lappend extra_objs linenoise.o
+    cc-check-functions isatty
 }
 if {[opt-bool references]} {
     msg-result "Enabling references"