TTY_get() in crypto/ui/ui_openssl.c open_console() can also return errno 1 (EPERM, Linux)
@@ -435,6 +435,16 @@ static int open_console(UI *ui)
is_a_tty = 0;
else
# endif
+# ifdef EPERM
+ /*
+ * Linux can return EPERM (Operation not permitted),
+ * e.g. if a daemon executes openssl via fork()+execve()
+ * This should be ok
+ */
+ if (errno == EPERM)
+ is_a_tty = 0;
+ else
+# endif
# ifdef ENODEV
/*
* MacOS X returns ENODEV (Operation not supported by device),
