FreeBSD Support

.changelog/126.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+freebsd: Implement a new provider for FreeBSD that requires CGO.
+```

.ci/scripts/check-cross-compile.sh

@@ -9,6 +9,7 @@ export CGO_ENABLED=0
 GOOS=aix     GOARCH=ppc64    go build ./...
 GOOS=darwin  GOARCH=amd64    go build ./...
 GOOS=darwin  GOARCH=arm64    go build ./...
+GOOS=freebsd GOARCH=amd64    go build ./...
 GOOS=linux   GOARCH=386      go build ./...
 GOOS=linux   GOARCH=amd64    go build ./...
 GOOS=linux   GOARCH=arm      go build ./...

Makefile

@@ -1,4 +1,4 @@
-.phony: update
+.PHONY: update
 update: fmt lic imports
 
 .PHONY: lic

README.md

@@ -30,28 +30,28 @@ if handleCounter, ok := process.(types.OpenHandleCounter); ok {
 These tables show what methods are implemented as well as the extra interfaces
 that are implemented.
 
-| `Host` Features  | Darwin | Linux | Windows | AIX |
-|------------------|--------|-------|---------|-----|
-| `Info()`         | x      | x     | x       | x   |
-| `Memory()`       | x      | x     | x       | x   |
-| `CPUTimer`       | x      | x     | x       | x   |
-| `LoadAverage`    | x      | x     |         |     |
-| `VMStat`         |        | x     |         |     |
-| `NetworkCounters`|        | x     |         |     |
-
-| `Process` Features     | Darwin | Linux | Windows | AIX |
-|------------------------|--------|-------|---------|-----|
-| `Info()`               | x      | x     | x       | x   |
-| `Memory()`             | x      | x     | x       | x   |
-| `User()`               | x      | x     | x       | x   |
-| `Parent()`             | x      | x     | x       | x   |
-| `CPUTimer`             | x      | x     | x       | x   |
-| `Environment`          | x      | x     |         | x   |
-| `OpenHandleEnumerator` |        | x     |         |     |
-| `OpenHandleCounter`    |        | x     |         |     |
-| `Seccomp`              |        | x     |         |     |
-| `Capabilities`         |        | x     |         |     |
-| `NetworkCounters`      |        | x     |         |     |
+| `Host` Features   | Darwin | Linux | Windows | AIX | FreeBSD |
+|-------------------|--------|-------|---------|-----|---------|
+| `Info()`          | x      | x     | x       | x   | x       |
+| `Memory()`        | x      | x     | x       | x   | x       |
+| `CPUTimer`        | x      | x     | x       | x   | x       |
+| `LoadAverage`     | x      | x     |         |     |         |
+| `VMStat`          |        | x     |         |     |         |
+| `NetworkCounters` |        | x     |         |     |         |
+
+| `Process` Features     | Darwin | Linux | Windows | AIX | FreeBSD |
+|------------------------|--------|-------|---------|-----|---------|
+| `Info()`               | x      | x     | x       | x   | x       |
+| `Memory()`             | x      | x     | x       | x   | x       |
+| `User()`               | x      | x     | x       | x   | x       |
+| `Parent()`             | x      | x     | x       | x   | x       |
+| `CPUTimer`             | x      | x     | x       | x   | x       |
+| `Environment`          | x      | x     |         | x   | x       |
+| `OpenHandleEnumerator` |        | x     |         |     | x       |
+| `OpenHandleCounter`    |        | x     |         |     | x       |
+| `Seccomp`              |        | x     |         |     |         |
+| `Capabilities`         |        | x     |         |     |         |
+| `NetworkCounters`      |        | x     |         |     |         |
 
 ### GOOS / GOARCH Pairs
 
@@ -62,6 +62,7 @@ This table lists the OS and architectures for which a "provider" is implemented.
 | aix/ppc64      | x            |        |
 | darwin/amd64   | optional *   | x      |
 | darwin/arm64   | optional *   | x      |
+| freebsd/amd64  | x            | x      |
 | linux/386      |              |        |
 | linux/amd64    |              | x      |
 | linux/arm      |              |        |

internal/cgo/disabled.go

@@ -0,0 +1,23 @@
+// Licensed to Elasticsearch B.V. under one or more contributor
+// license agreements. See the NOTICE file distributed with
+// this work for additional information regarding copyright
+// ownership. Elasticsearch B.V. licenses this file to you under
+// the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+//go:build !cgo
+
+package cgo
+
+// Enabled is true if cgo was enabled at compile-time.
+const Enabled = false

internal/cgo/enabled.go

@@ -0,0 +1,23 @@
+// Licensed to Elasticsearch B.V. under one or more contributor
+// license agreements. See the NOTICE file distributed with
+// this work for additional information regarding copyright
+// ownership. Elasticsearch B.V. licenses this file to you under
+// the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+//go:build cgo
+
+package cgo
+
+// Enabled is true if cgo was enabled at compile-time.
+const Enabled = true

providers/freebsd/defs_freebsd.go

@@ -0,0 +1,33 @@
+// Licensed to Elasticsearch B.V. under one or more contributor
+// license agreements. See the NOTICE file distributed with
+// this work for additional information regarding copyright
+// ownership. Elasticsearch B.V. licenses this file to you under
+// the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+//go:build ignore
+// +build ignore
+
+package freebsd
+
+/*
+#include <sys/types.h>
+#include <sys/vmmeter.h>
+#include <sys/time.h>
+#include <kvm.h>
+*/
+import "C"
+
+type kvmSwap C.struct_kvm_swap
+
+type clockInfo C.struct_clockinfo

providers/freebsd/doc.go

@@ -0,0 +1,22 @@
+// Licensed to Elasticsearch B.V. under one or more contributor
+// license agreements. See the NOTICE file distributed with
+// this work for additional information regarding copyright
+// ownership. Elasticsearch B.V. licenses this file to you under
+// the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+// Package freebsd implements the HostProvider and ProcessProvider interfaces
+// for providing information about FreeBSD.
+package freebsd
+
+//go:generate sh -c "go tool cgo -godefs defs_freebsd.go > ztypes_freebsd.go"