fstatfs_zos_test.go

Documentation: golang.org/x/sys/unix

     1  // Copyright 2020 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  //go:build zos && s390x
     6  
     7  package unix_test
     8  
     9  import (
    10  	"os"
    11  	"testing"
    12  	"unsafe"
    13  
    14  	"golang.org/x/sys/unix"
    15  )
    16  
    17  func TestFstatfs(t *testing.T) {
    18  
    19  	wd, err := os.Getwd()
    20  	if err != nil {
    21  		t.Fatal(err)
    22  	}
    23  	file, err := os.Open(wd)
    24  	if err != nil {
    25  		t.Fatal(err)
    26  	}
    27  
    28  	//Query Statfs_t and Statvfs_t from wd, check content
    29  	var stat unix.Statfs_t
    30  	err = unix.Fstatfs(int(file.Fd()), &stat)
    31  	if err != nil {
    32  		t.Fatal(err)
    33  	}
    34  	var stat_v unix.Statvfs_t
    35  	err = unix.Fstatvfs(int(file.Fd()), &stat_v)
    36  	if stat.Bsize != stat_v.Bsize ||
    37  		stat.Blocks != stat_v.Blocks ||
    38  		stat.Bfree != stat_v.Bfree ||
    39  		stat.Bavail != stat_v.Bavail ||
    40  		stat.Files != stat_v.Files ||
    41  		stat.Ffree != stat_v.Ffree ||
    42  		stat.Fsid != stat_v.Fsid ||
    43  		stat.Namelen != stat_v.Namemax ||
    44  		stat.Frsize != stat_v.Frsize ||
    45  		stat.Flags != stat_v.Flag {
    46  		t.Errorf("Mismatching fields in Statfs_t and Statvfs_t.\nStatfs_t = %+v\nStatvfs_t = %+v", stat, stat_v)
    47  	}
    48  
    49  	//Initialize W_Mntent, find corresponding device and check filesystem type
    50  	var mnt_ent_buffer struct {
    51  		header       unix.W_Mnth
    52  		filesys_info [128]unix.W_Mntent
    53  	}
    54  	var buffer_size int = int(unsafe.Sizeof(mnt_ent_buffer))
    55  	var fs_count int = -1
    56  	for fs_count < 0 {
    57  		fs_count, err = unix.W_Getmntent((*byte)(unsafe.Pointer(&mnt_ent_buffer)), buffer_size)
    58  		if err != nil {
    59  			t.Fatal(err)
    60  		}
    61  		for i := 0; i < fs_count; i++ {
    62  			if stat.Fsid == uint64(mnt_ent_buffer.filesys_info[i].Dev) {
    63  				correct_type := uint32(mnt_ent_buffer.filesys_info[i].Fstname[0])
    64  				if stat.Type != correct_type {
    65  					t.Errorf("File system type is 0x%x. Should be 0x%x instead", stat.Type, correct_type)
    66  				}
    67  				return
    68  			}
    69  		}
    70  	}
    71  
    72  }
    73
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