Use Getfsstat from golang.org/x/sys/unix on OpenBSD

Use the syscall wrapper and types from golang.org/x/sys/unix instead of
implementing them locally.

Also remove unused generated types and consts.

Follow-up for #810 and #812

disk/disk_openbsd.go

@@ -7,7 +7,6 @@ import (
 	"context"
 	"encoding/binary"
 	"path"
-	"unsafe"
 
 	"github.com/shirou/gopsutil/internal/common"
 	"golang.org/x/sys/unix"
@@ -26,8 +25,8 @@ func PartitionsWithContext(ctx context.Context, all bool) ([]PartitionStat, erro
 		return ret, err
 	}
 
-	fs := make([]Statfs, count)
+	fs := make([]unix.Statfs_t, count)
-	if _, err = Getfsstat(fs, unix.MNT_WAIT); err != nil {
+	if _, err = unix.Getfsstat(fs, unix.MNT_WAIT); err != nil {
 		return ret, err
 	}
 
@@ -123,27 +122,6 @@ func IOCountersWithContext(ctx context.Context, names ...string) (map[string]IOC
 
 // BT2LD(time)     ((long double)(time).sec + (time).frac * BINTIME_SCALE)
 
-// Getfsstat is borrowed from pkg/syscall/syscall_freebsd.go
-// change Statfs_t to Statfs in order to get more information
-func Getfsstat(buf []Statfs, flags int) (n int, err error) {
-	return GetfsstatWithContext(context.Background(), buf, flags)
-}
-
-func GetfsstatWithContext(ctx context.Context, buf []Statfs, flags int) (n int, err error) {
-	var _p0 unsafe.Pointer
-	var bufsize uintptr
-	if len(buf) > 0 {
-		_p0 = unsafe.Pointer(&buf[0])
-		bufsize = unsafe.Sizeof(Statfs{}) * uintptr(len(buf))
-	}
-	r0, _, e1 := unix.Syscall(unix.SYS_GETFSSTAT, uintptr(_p0), bufsize, uintptr(flags))
-	n = int(r0)
-	if e1 != 0 {
-		err = e1
-	}
-	return
-}
-
 func parseDiskstats(buf []byte) (Diskstats, error) {
 	var ds Diskstats
 	br := bytes.NewReader(buf)

disk/disk_openbsd_386.go

@@ -4,13 +4,6 @@
 package disk
 
 const (
-	sizeofPtr        = 0x4
-	sizeofShort      = 0x2
-	sizeofInt        = 0x4
-	sizeofLong       = 0x4
-	sizeofLongLong   = 0x8
-	sizeofLongDouble = 0x8
-
 	DEVSTAT_NO_DATA = 0x00
 	DEVSTAT_READ    = 0x01
 	DEVSTAT_WRITE   = 0x02
@@ -21,39 +14,6 @@ const (
 	sizeOfDiskstats = 0x60
 )
 
-type (
-	_C_short       int16
-	_C_int         int32
-	_C_long        int32
-	_C_long_long   int64
-	_C_long_double int64
-)
-
-type Statfs struct {
-	F_flags       uint32
-	F_bsize       uint32
-	F_iosize      uint32
-	F_blocks      uint64
-	F_bfree       uint64
-	F_bavail      int64
-	F_files       uint64
-	F_ffree       uint64
-	F_favail      int64
-	F_syncwrites  uint64
-	F_syncreads   uint64
-	F_asyncwrites uint64
-	F_asyncreads  uint64
-	F_fsid        Fsid
-	F_namemax     uint32
-	F_owner       uint32
-	F_ctime       uint64
-	F_fstypename  [16]int8
-	F_mntonname   [90]int8
-	F_mntfromname [90]int8
-	F_mntfromspec [90]int8
-	Pad_cgo_0     [2]byte
-	Mount_info    [160]byte
-}
 type Diskstats struct {
 	Name       [16]int8
 	Busy       int32
@@ -66,9 +26,6 @@ type Diskstats struct {
 	Timestamp  Timeval
 	Time       Timeval
 }
-type Fsid struct {
-	Val [2]int32
-}
 type Timeval struct {
 	Sec  int64
 	Usec int32

disk/disk_openbsd_amd64.go

@@ -1,16 +1,9 @@
-// Created by cgo -godefs - DO NOT EDIT
+// Code generated by cmd/cgo -godefs; DO NOT EDIT.
 // cgo -godefs types_openbsd.go
 
 package disk
 
 const (
-	sizeofPtr        = 0x8
-	sizeofShort      = 0x2
-	sizeofInt        = 0x4
-	sizeofLong       = 0x8
-	sizeofLongLong   = 0x8
-	sizeofLongDouble = 0x8
-
 	DEVSTAT_NO_DATA = 0x00
 	DEVSTAT_READ    = 0x01
 	DEVSTAT_WRITE   = 0x02
@@ -21,40 +14,6 @@ const (
 	sizeOfDiskstats = 0x70
 )
 
-type (
-	_C_short       int16
-	_C_int         int32
-	_C_long        int64
-	_C_long_long   int64
-	_C_long_double int64
-)
-
-type Statfs struct {
-	F_flags       uint32
-	F_bsize       uint32
-	F_iosize      uint32
-	Pad_cgo_0     [4]byte
-	F_blocks      uint64
-	F_bfree       uint64
-	F_bavail      int64
-	F_files       uint64
-	F_ffree       uint64
-	F_favail      int64
-	F_syncwrites  uint64
-	F_syncreads   uint64
-	F_asyncwrites uint64
-	F_asyncreads  uint64
-	F_fsid        Fsid
-	F_namemax     uint32
-	F_owner       uint32
-	F_ctime       uint64
-	F_fstypename  [16]int8
-	F_mntonname   [90]int8
-	F_mntfromname [90]int8
-	F_mntfromspec [90]int8
-	Pad_cgo_1     [2]byte
-	Mount_info    [160]byte
-}
 type Diskstats struct {
 	Name       [16]int8
 	Busy       int32
@@ -68,9 +27,6 @@ type Diskstats struct {
 	Timestamp  Timeval
 	Time       Timeval
 }
-type Fsid struct {
-	Val [2]int32
-}
 type Timeval struct {
 	Sec  int64
 	Usec int64

disk/types_openbsd.go

@@ -11,24 +11,10 @@ package disk
 #include <sys/types.h>
 #include <sys/disk.h>
 #include <sys/mount.h>
-
-enum {
-	sizeofPtr = sizeof(void*),
-};
-
 */
 import "C"
 
-// Machine characteristics; for internal use.
-
 const (
-	sizeofPtr        = C.sizeofPtr
-	sizeofShort      = C.sizeof_short
-	sizeofInt        = C.sizeof_int
-	sizeofLong       = C.sizeof_long
-	sizeofLongLong   = C.sizeof_longlong
-	sizeofLongDouble = C.sizeof_longlong
-
 	DEVSTAT_NO_DATA = 0x00
 	DEVSTAT_READ    = 0x01
 	DEVSTAT_WRITE   = 0x02
@@ -39,19 +25,7 @@ const (
 	sizeOfDiskstats = C.sizeof_struct_diskstats
 )
 
-// Basic types
-
-type (
-	_C_short       C.short
-	_C_int         C.int
-	_C_long        C.long
-	_C_long_long   C.longlong
-	_C_long_double C.longlong
-)
-
-type Statfs C.struct_statfs
 type Diskstats C.struct_diskstats
-type Fsid C.fsid_t
 type Timeval C.struct_timeval
 
 type Diskstat C.struct_diskstat