Gibheer
fa05045d31
This is the import from the separate monfront repository. The history could not be imported, but this should suffice.
165 lines
4.1 KiB
Go
165 lines
4.1 KiB
Go
// Copyright 2020 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build zos && s390x
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// +build zos,s390x
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package unix
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import (
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"unsafe"
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)
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// This file simulates fstatfs on z/OS using fstatvfs and w_getmntent.
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func Fstatfs(fd int, stat *Statfs_t) (err error) {
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var stat_v Statvfs_t
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err = Fstatvfs(fd, &stat_v)
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if err == nil {
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// populate stat
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stat.Type = 0
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stat.Bsize = stat_v.Bsize
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stat.Blocks = stat_v.Blocks
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stat.Bfree = stat_v.Bfree
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stat.Bavail = stat_v.Bavail
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stat.Files = stat_v.Files
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stat.Ffree = stat_v.Ffree
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stat.Fsid = stat_v.Fsid
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stat.Namelen = stat_v.Namemax
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stat.Frsize = stat_v.Frsize
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stat.Flags = stat_v.Flag
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for passn := 0; passn < 5; passn++ {
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switch passn {
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case 0:
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err = tryGetmntent64(stat)
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break
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case 1:
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err = tryGetmntent128(stat)
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break
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case 2:
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err = tryGetmntent256(stat)
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break
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case 3:
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err = tryGetmntent512(stat)
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break
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case 4:
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err = tryGetmntent1024(stat)
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break
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default:
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break
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}
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//proceed to return if: err is nil (found), err is nonnil but not ERANGE (another error occurred)
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if err == nil || err != nil && err != ERANGE {
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break
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}
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}
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}
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return err
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}
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func tryGetmntent64(stat *Statfs_t) (err error) {
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var mnt_ent_buffer struct {
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header W_Mnth
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filesys_info [64]W_Mntent
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}
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var buffer_size int = int(unsafe.Sizeof(mnt_ent_buffer))
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fs_count, err := W_Getmntent((*byte)(unsafe.Pointer(&mnt_ent_buffer)), buffer_size)
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if err != nil {
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return err
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}
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err = ERANGE //return ERANGE if no match is found in this batch
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for i := 0; i < fs_count; i++ {
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if stat.Fsid == uint64(mnt_ent_buffer.filesys_info[i].Dev) {
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stat.Type = uint32(mnt_ent_buffer.filesys_info[i].Fstname[0])
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err = nil
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break
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}
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}
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return err
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}
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func tryGetmntent128(stat *Statfs_t) (err error) {
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var mnt_ent_buffer struct {
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header W_Mnth
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filesys_info [128]W_Mntent
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}
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var buffer_size int = int(unsafe.Sizeof(mnt_ent_buffer))
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fs_count, err := W_Getmntent((*byte)(unsafe.Pointer(&mnt_ent_buffer)), buffer_size)
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if err != nil {
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return err
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}
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err = ERANGE //return ERANGE if no match is found in this batch
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for i := 0; i < fs_count; i++ {
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if stat.Fsid == uint64(mnt_ent_buffer.filesys_info[i].Dev) {
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stat.Type = uint32(mnt_ent_buffer.filesys_info[i].Fstname[0])
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err = nil
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break
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}
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}
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return err
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}
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func tryGetmntent256(stat *Statfs_t) (err error) {
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var mnt_ent_buffer struct {
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header W_Mnth
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filesys_info [256]W_Mntent
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}
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var buffer_size int = int(unsafe.Sizeof(mnt_ent_buffer))
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fs_count, err := W_Getmntent((*byte)(unsafe.Pointer(&mnt_ent_buffer)), buffer_size)
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if err != nil {
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return err
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}
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err = ERANGE //return ERANGE if no match is found in this batch
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for i := 0; i < fs_count; i++ {
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if stat.Fsid == uint64(mnt_ent_buffer.filesys_info[i].Dev) {
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stat.Type = uint32(mnt_ent_buffer.filesys_info[i].Fstname[0])
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err = nil
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break
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}
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}
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return err
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}
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func tryGetmntent512(stat *Statfs_t) (err error) {
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var mnt_ent_buffer struct {
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header W_Mnth
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filesys_info [512]W_Mntent
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}
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var buffer_size int = int(unsafe.Sizeof(mnt_ent_buffer))
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fs_count, err := W_Getmntent((*byte)(unsafe.Pointer(&mnt_ent_buffer)), buffer_size)
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if err != nil {
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return err
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}
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err = ERANGE //return ERANGE if no match is found in this batch
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for i := 0; i < fs_count; i++ {
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if stat.Fsid == uint64(mnt_ent_buffer.filesys_info[i].Dev) {
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stat.Type = uint32(mnt_ent_buffer.filesys_info[i].Fstname[0])
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err = nil
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break
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}
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}
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return err
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}
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func tryGetmntent1024(stat *Statfs_t) (err error) {
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var mnt_ent_buffer struct {
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header W_Mnth
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filesys_info [1024]W_Mntent
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}
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var buffer_size int = int(unsafe.Sizeof(mnt_ent_buffer))
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fs_count, err := W_Getmntent((*byte)(unsafe.Pointer(&mnt_ent_buffer)), buffer_size)
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if err != nil {
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return err
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}
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err = ERANGE //return ERANGE if no match is found in this batch
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for i := 0; i < fs_count; i++ {
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if stat.Fsid == uint64(mnt_ent_buffer.filesys_info[i].Dev) {
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stat.Type = uint32(mnt_ent_buffer.filesys_info[i].Fstname[0])
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err = nil
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break
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}
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}
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return err
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}
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