From 4e9fecc767104a1f3cbc462d877028be2fa22dc3 Mon Sep 17 00:00:00 2001
From: Carter Li <zhangsongcui3371@sina.com>
Date: Sun, 26 Jan 2025 23:17:30 +0800
Subject: [PATCH] Sound (NetBSD): don't assume readlink reports file name only

---
 src/detection/sound/sound_bsd.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/detection/sound/sound_bsd.c b/src/detection/sound/sound_bsd.c
index b3b813b27..fd6236cf1 100644
--- a/src/detection/sound/sound_bsd.c
+++ b/src/detection/sound/sound_bsd.c
@@ -15,10 +15,11 @@ const char* ffDetectSound(FFlist* devices)
     #else
     int defaultDev;
     {
-        char mixerp[8];
-        if (readlink("/dev/mixer", mixerp, ARRAY_SIZE(mixerp)) != 6)
+        char mixerp[12];
+        ssize_t plen = readlink("/dev/mixer", mixerp, ARRAY_SIZE(mixerp));
+        if (plen < 6)
             return "readlink(/dev/mixer) failed";
-        defaultDev = mixerp[5] - '0';
+        defaultDev = mixerp[plen - 1] - '0';
         if (defaultDev < 0 || defaultDev > 9)
             return "Invalid mixer device";
     }