From 49dc947ba4c33324b969ef7179768c806910fffb Mon Sep 17 00:00:00 2001
From: choc <notchoc@proton.me>
Date: Sat, 22 Jun 2024 10:52:33 +0800
Subject: [PATCH] swallow: add freebsd support

---
 dwl.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/dwl.c b/dwl.c
index 3a3167b..ee9e965 100644
--- a/dwl.c
+++ b/dwl.c
@@ -65,6 +65,14 @@
 #include <xcb/xcb_icccm.h>
 #endif
 
+#ifdef __FreeBSD__
+#define __BSD_VISIBLE
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/sysctl.h>
+#include <sys/user.h>
+#endif
+
 #include "util.h"
 
 /* macros */
@@ -1486,6 +1494,7 @@ handlesig(int signo)
 pid_t
 getparentprocess(pid_t p)
 {
+#ifdef __linux__
 	unsigned int v = 0;
 
 	FILE *f;
@@ -1499,6 +1508,14 @@ getparentprocess(pid_t p)
 	fclose(f);
 
 	return (pid_t)v;
+#elif defined(__FreeBSD__)
+	struct kinfo_proc kip;
+	size_t len = sizeof(struct kinfo_proc);
+	int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, p };
+	if (sysctl(mib, 4, &kip, &len, NULL, 0) < 0 || len == 0)
+		return 0;
+	return kip.ki_ppid;
+#endif
 }
 
 int
-- 
2.43.0