all: add AIX provider

Add a implementation with CGO for AIX.

Process information are retrieved by /proc folder or with libperfstat,
getprocs syscalls.

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 
 - Added detection of containerized cgroup in Kubernetes [#80](https://github.com/elastic/go-sysinfo/pull/80)
+- Add AIX support [#77](https://github.com/elastic/go-sysinfo/pull/77)
 
 ### Changed
 

README.md

@@ -31,25 +31,23 @@ 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 |
-|------------------|--------|-------|---------|
-| `Info()`         | x      | x     | x       |
-| `Memory()`       | x      | x     | x       |
-| `CPUTimer`       | x      | x     | x       |
-| `VMStat`         |        | x     |         |
-| `NetworkCounters`|        | x     |         |
-
-| `Process` Features     | Darwin | Linux | Windows |
-|------------------------|--------|-------|---------|
-| `Info()`               | x      | x     | x       |
-| `Memory()`             | x      | x     | x       |
-| `User()`               | x      | x     | x       |
-| `Parent()`             | x      | x     | x       |
-| `CPUTimer`             | x      | x     | x       |
-| `Environment`          | x      | x     |         |
-| `OpenHandleEnumerator` |        | x     |         |
-| `OpenHandleCounter`    |        | x     |         |
-| `Seccomp`              |        | x     |         |
-| `Capabilities`         |        | x     |         |
-
-
+| `Host` Features  | Darwin | Linux | Windows | AIX/ppc64 |
+|------------------|--------|-------|---------|-----------|
+| `Info()`         | x      | x     | x       | x         |
+| `Memory()`       | x      | x     | x       | x         |
+| `CPUTimer`       | x      | x     | x       | x         |
+| `VMStat`         |        | x     |         |           |
+| `NetworkCounters`|        | x     |         |           |
+
+| `Process` Features     | Darwin | Linux | Windows | AIX/ppc64 |
+|------------------------|--------|-------|---------|-----------|
+| `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     |         |           |

providers/aix/boottime_aix.go

@@ -0,0 +1,78 @@
+// 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 aix
+
+import (
+	"encoding/binary"
+	"os"
+	"time"
+
+	"github.com/pkg/errors"
+)
+
+// utmp can't be used by "encoding/binary" if generated by cgo,
+// some pads will be missing.
+type utmp struct {
+	User        [256]uint8
+	Id          [14]uint8
+	Line        [64]uint8
+	XPad1       int16
+	Pid         int32
+	Type        int16
+	XPad2       int16
+	Time        int64
+	Termination int16
+	Exit        int16
+	Host        [256]uint8
+	Xdblwordpad int32
+	XreservedA  [2]int32
+	XreservedV  [6]int32
+}
+
+const (
+	typeBootTime = 2
+)
+
+// BootTime returns the time at which the machine was started, truncated to the nearest second
+func BootTime() (time.Time, error) {
+	return bootTime("/etc/utmp")
+}
+
+func bootTime(filename string) (time.Time, error) {
+	// Get boot time from /etc/utmp
+	file, err := os.Open(filename)
+	if err != nil {
+		return time.Time{}, errors.Wrap(err, "failed to get host uptime: cannot open /etc/utmp")
+	}
+
+	defer file.Close()
+
+	for {
+		var utmp utmp
+		if err := binary.Read(file, binary.BigEndian, &utmp); err != nil {
+			break
+		}
+
+		if utmp.Type == typeBootTime {
+			return time.Unix(utmp.Time, 0), nil
+		}
+	}
+
+	return time.Time{}, errors.Wrap(err, "failed to get host uptime: no utmp record")
+
+}

providers/aix/boottime_test.go

@@ -0,0 +1,34 @@
+// 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 aix
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestBootTime(t *testing.T) {
+	bt, err := bootTime("testdata/utmp")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	assert.EqualValues(t, bt.Unix(), 1585726535)
+
+}

providers/aix/defs_aix.go

@@ -0,0 +1,41 @@
+// 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.
+
+// +build ignore
+
+package aix
+
+/*
+#include <sys/types.h>
+#include <utmp.h>
+#include <sys/procfs.h>
+*/
+import "C"
+
+type prcred C.prcred_t
+
+type pstatus C.pstatus_t
+type prTimestruc64 C.pr_timestruc64_t
+type prSigset C.pr_sigset_t
+type fltset C.fltset_t
+type lwpstatus C.lwpstatus_t
+type prSiginfo64 C.pr_siginfo64_t
+type prStack64 C.pr_stack64_t
+type prSigaction64 C.struct_pr_sigaction64
+type prgregset C.prgregset_t
+type prfpregset C.prfpregset_t
+type pfamily C.pfamily_t

providers/aix/doc.go

@@ -0,0 +1,20 @@
+// 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 aix implements the HostProvider and ProcessProvider interfaces
+// for providing information about MacOS.
+package aix