* main.c (main): [SV 43434] Handle NULL returns from ttyname().

1 files changed, 2 insertions, 1 deletions

diff --git a/makeint.h b/makeint.h
index 6223936..2009f41 100644
--- a/makeint.h
+++ b/makeint.h
@@ -436,10 +436,11 @@ extern struct rlimit stack_limit;
 /* The number of bytes needed to represent the largest integer as a string.  */
 #define INTSTR_LENGTH         CSTRLEN ("18446744073709551616")
 
+#define DEFAULT_TTYNAME "true"
 #ifdef HAVE_TTYNAME
 # define TTYNAME(_f) ttyname (_f)
 #else
-# define TTYNAME(_f) "true"
+# define TTYNAME(_f) DEFAULT_TTYNAME
 #endif