notmuch setup: Exit if EOF is encountered at any prompt.

If the user is explicitly providing EOF, then terminating the program
is the most likely desired thing to do. This also avoids undefined
behavior from continuing with an uninitialized response after ignoring
the return value of getline().

1 files changed, 9 insertions, 6 deletions

diff --git a/notmuch-setup.c b/notmuch-setup.c
index 5ec176d3..622bbaa6 100644
--- a/notmuch-setup.c
+++ b/notmuch-setup.c
@@ -100,12 +100,15 @@ notmuch_setup_command (unused (void *ctx),
     unsigned int i;
     int is_new;
 
-#define prompt(format, ...)				\
-    do {						\
-	printf (format, ##__VA_ARGS__);			\
-	fflush (stdout);				\
-	getline (&response, &response_size, stdin);	\
-	chomp_newline (response);			\
+#define prompt(format, ...)					\
+    do {							\
+	printf (format, ##__VA_ARGS__);				\
+	fflush (stdout);					\
+	if (getline (&response, &response_size, stdin) < 0) {	\
+	    printf ("Exiting.\n");				\
+	    exit (1);						\
+	}							\
+	chomp_newline (response);				\
     } while (0)
 
     config = notmuch_config_open (ctx, NULL, &is_new);