[freebsd][host]: fix Users() return start secs.

host/freebsd_headers/utxdb.h

@@ -0,0 +1,63 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2010 Ed Schouten <ed@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _UTXDB_H_
+#define	_UTXDB_H_
+
+#include <stdint.h>
+
+#define	_PATH_UTX_ACTIVE	"/var/run/utx.active"
+#define	_PATH_UTX_LASTLOGIN	"/var/log/utx.lastlogin"
+#define	_PATH_UTX_LOG		"/var/log/utx.log"
+
+/*
+ * Entries in struct futx are ordered by how often they are used.  In
+ * utx.log only entries will be written until the last non-zero byte,
+ * which means we want to put the hostname at the end. Most primitive
+ * records only store a ut_type and ut_tv, which means we want to store
+ * those at the front.
+ */
+
+struct utmpx;
+
+struct futx {
+	uint8_t		fu_type;
+	uint64_t	fu_tv;
+	char		fu_id[8];
+	uint32_t	fu_pid;
+	char		fu_user[32];
+	char		fu_line[16];
+	char		fu_host[128];
+} __packed;
+
+void	utx_to_futx(const struct utmpx *, struct futx *);
+struct utmpx *futx_to_utx(const struct futx *);
+
+#endif /* !_UTXDB_H_ */

host/host_freebsd.go

@@ -7,6 +7,7 @@ import (
 	"context"
 	"encoding/binary"
 	"io/ioutil"
+	"math"
 	"os"
 	"runtime"
 	"strings"
@@ -143,11 +144,11 @@ func UsersWithContext(ctx context.Context) ([]UserStat, error) {
 		b := buf[i*sizeOfUtmpx : (i+1)*sizeOfUtmpx]
 		var u Utmpx
 		br := bytes.NewReader(b)
-		err := binary.Read(br, binary.LittleEndian, &u)
+		err := binary.Read(br, binary.BigEndian, &u)
 		if err != nil || u.Type != 4 {
 			continue
 		}
-		sec := (binary.LittleEndian.Uint32(u.Tv.Sec[:])) / 2 // TODO:
+		sec := math.Floor(float64(u.Tv) / 1000000)
 		user := UserStat{
 			User:     common.IntToString(u.User[:]),
 			Terminal: common.IntToString(u.Line[:]),

host/host_freebsd_amd64.go

@@ -1,4 +1,4 @@
-// Created by cgo -godefs - DO NOT EDIT
+// Code generated by cmd/cgo -godefs; DO NOT EDIT.
 // cgo -godefs types_freebsd.go
 
 package host
@@ -9,7 +9,7 @@ const (
 	sizeofInt      = 0x4
 	sizeofLong     = 0x8
 	sizeofLongLong = 0x8
-	sizeOfUtmpx    = 197 // TODO: why should 197, not 0x118
+	sizeOfUtmpx    = 0xc5
 )
 
 type (
@@ -27,18 +27,11 @@ type Utmp struct {
 }
 
 type Utmpx struct {
-	Type int16
-	Tv   Timeval
+	Type uint8
+	Tv   uint64
 	Id   [8]int8
-	Pid  int32
+	Pid  uint32
 	User [32]int8
 	Line [16]int8
-	Host [125]int8
-	//      Host [128]int8
-	//      X__ut_spare [64]int8
-}
-
-type Timeval struct {
-	Sec  [4]byte
-	Usec [3]byte
+	Host [128]int8
 }

host/types_freebsd.go

@@ -11,6 +11,7 @@ package host
 #include <sys/types.h>
 #include <sys/time.h>
 #include <utmpx.h>
+#include "freebsd_headers/utxdb.h"
 
 enum {
 	sizeofPtr = sizeof(void*),
@@ -27,7 +28,7 @@ const (
 	sizeofInt      = C.sizeof_int
 	sizeofLong     = C.sizeof_long
 	sizeofLongLong = C.sizeof_longlong
-	sizeOfUtmpx    = C.sizeof_struct_utmpx
+	sizeOfUtmpx    = C.sizeof_struct_futx
 )
 
 // Basic types
@@ -39,6 +40,5 @@ type (
 	_C_long_long C.longlong
 )
 
-type Utmp C.struct_utmp
-type Utmpx C.struct_utmpx
-type Timeval C.struct_timeval
+type Utmp C.struct_utmp // for FreeBSD 9.0 compatibility
+type Utmpx C.struct_futx