less: add a bit more robustness in keyboard reading code

diff --git a/miscutils/less.c b/miscutils/less.c
index 9b2c43bd57909afe6e9b5d21e229f33de9c499aa..a6649c5ca30b6028a7ea80526196c829e410ea77 100644 (file)
--- a/miscutils/less.c
+++ b/miscutils/less.c
@@ -699,10 +699,11 @@ static int less_getch(void)
        char input[16];
        unsigned i;
  again:
+       memset(input, 0, sizeof(input));
        getch_nowait(input, sizeof(input));
+
        /* Detect escape sequences (i.e. arrow keys) and handle
         * them accordingly */
-
        if (input[0] == '\033' && input[1] == '[') {
                set_tty_cooked();
                i = input[2] - REAL_KEY_UP;
@@ -740,6 +741,7 @@ static char* less_gets(int sz)
                 * but it is needed. Is it because of stdio? */
                tcsetattr(kbd_fd, TCSANOW, &term_less);
 
+               c = '\0';
                read(kbd_fd, &c, 1);
                if (c == 0x0d)
                        return result;