kiss: Abort if not TTY and needed

FossilOrigin-Name: 6b464ae8ed15a5bca76b4aecc7c0b17a55bf252231ff0991c289b9401a2cb233

1 files changed, 5 insertions, 0 deletions

diff --git a/kiss b/kiss
index 821b77f..9d4e877 100755
--- a/kiss
+++ b/kiss
@@ -1216,6 +1216,11 @@ args() {
             die "Arguments contain invalid characters: '!*[]'"
         esac
 
+    # Abort early if output is not a TTY and the requirement is that it
+    # be so (password prompts, user input, etc). This is a safeguard.
+    [ "${action##[bciru]*}" ] || [ -t 1 ] ||
+        die "Output not a tty"
+
     # Parse some arguments earlier to remove the need to duplicate code.
     case $action in
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