getfsstat_test.go

Documentation: golang.org/x/sys/unix

     1  // Copyright 2022 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 darwin || dragonfly || freebsd || openbsd
     6  
     7  package unix_test
     8  
     9  import (
    10  	"os/exec"
    11  	"testing"
    12  
    13  	"golang.org/x/sys/unix"
    14  )
    15  
    16  func TestGetfsstat(t *testing.T) {
    17  	n, err := unix.Getfsstat(nil, unix.MNT_NOWAIT)
    18  	if err != nil {
    19  		t.Fatal(err)
    20  	}
    21  
    22  	data := make([]unix.Statfs_t, n)
    23  	n2, err := unix.Getfsstat(data, unix.MNT_NOWAIT)
    24  	if err != nil {
    25  		t.Fatal(err)
    26  	}
    27  	if n != n2 {
    28  		t.Errorf("Getfsstat(nil) = %d, but subsequent Getfsstat(slice) = %d", n, n2)
    29  	}
    30  	for i, stat := range data {
    31  		if stat == (unix.Statfs_t{}) {
    32  			t.Errorf("index %v is an empty Statfs_t struct", i)
    33  		}
    34  	}
    35  	if t.Failed() {
    36  		for i, stat := range data[:n2] {
    37  			t.Logf("data[%v] = %+v", i, stat)
    38  		}
    39  		mount, err := exec.Command("mount").CombinedOutput()
    40  		if err != nil {
    41  			t.Logf("mount: %v\n%s", err, mount)
    42  		} else {
    43  			t.Logf("mount: %s", mount)
    44  		}
    45  	}
    46  }
    47
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