From d6932bb08f357a22682e8af2086131f92600ad02 Mon Sep 17 00:00:00 2001
From: Matthias Wirth <matthias.wirth@gmail.com>
Date: Mon, 2 Sep 2024 23:03:19 +0200
Subject: [PATCH] make log_ppm work with argument 0 as expected

---
 readsb.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/readsb.c b/readsb.c
index a4aca6c4..8292d919 100644
--- a/readsb.c
+++ b/readsb.c
@@ -1924,9 +1924,12 @@ static error_t parse_opt(int key, char *arg, struct argp_state *state) {
                 if (strcasecmp(token[0], "log_ppm") == 0) {
                     if (token[1]) {
                         Modes.devel_log_ppm = atoi(token[1]);
-                    } else {
+                    }
+                    if (Modes.devel_log_ppm == 0) {
                         Modes.devel_log_ppm = -1;
                     }
+                    // setting to -1 to enable due to the following check
+                    // if (Modes.devel_log_ppm && fabs(ppm) > Modes.devel_log_ppm) {
                 }
 
                 if (strcasecmp(token[0], "sbs_override_squawk") == 0 && token[1]) {