From 79e9a0726366520ba69f0ad28db8641aef30733d Mon Sep 17 00:00:00 2001
From: James Bebbington <jbebbington@google.com>
Date: Sat, 12 Sep 2020 12:35:21 +1000
Subject: [PATCH] Add ProcsCreated stat for openbsd

---
 load/load_bsd.go     | 12 ++++++++++++
 load/load_freebsd.go |  7 +++++++
 load/load_openbsd.go | 17 +++++++++++++++++
 3 files changed, 36 insertions(+)
 create mode 100644 load/load_freebsd.go
 create mode 100644 load/load_openbsd.go

diff --git a/load/load_bsd.go b/load/load_bsd.go
index dfac10c..9cb254a 100644
--- a/load/load_bsd.go
+++ b/load/load_bsd.go
@@ -37,6 +37,12 @@ func AvgWithContext(ctx context.Context) (*AvgStat, error) {
 	return ret, nil
 }
 
+type forkstat struct {
+	forks    int
+	vforks   int
+	__tforks int
+}
+
 // Misc returns miscellaneous host-wide statistics.
 // darwin use ps command to get process running/blocked count.
 // Almost same as Darwin implementation, but state is different.
@@ -64,5 +70,11 @@ func MiscWithContext(ctx context.Context) (*MiscStat, error) {
 		}
 	}
 
+	f, err := getForkStat()
+	if err != nil {
+		return nil, err
+	}
+	ret.ProcsCreated = f.forks
+
 	return &ret, nil
 }
diff --git a/load/load_freebsd.go b/load/load_freebsd.go
new file mode 100644
index 0000000..bee8f55
--- /dev/null
+++ b/load/load_freebsd.go
@@ -0,0 +1,7 @@
+// +build freebsd
+
+package load
+
+func getForkStat() (forkstat, error) {
+	return forkstat{}, nil
+}
diff --git a/load/load_openbsd.go b/load/load_openbsd.go
new file mode 100644
index 0000000..b299f58
--- /dev/null
+++ b/load/load_openbsd.go
@@ -0,0 +1,17 @@
+// +build openbsd
+
+package load
+
+import (
+	"unsafe"
+
+	"golang.org/x/sys/unix"
+)
+
+func getForkStat() (forkstat, error) {
+	b, err := unix.SysctlRaw("kern.forkstat")
+	if err != nil {
+		return forkstat{}, err
+	}
+	return *(*forkstat)(unsafe.Pointer((&b[0]))), nil
+}