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// Copyright (c) 2022-2025, Sylabs Inc. All rights reserved.
// This software is licensed under a 3-clause BSD license. Please consult the
// LICENSE file distributed with the sources of this project regarding your
// rights to use or distribute this software.
package user
import (
"bufio"
"context"
"errors"
"fmt"
"os"
"os/exec"
"path/filepath"
"strings"
"testing"
)
var corpus = filepath.Join("..", "..", "test", "images")
func Test_Unmount(t *testing.T) {
if _, err := exec.LookPath("squashfuse"); err != nil {
t.Skip("squashfuse not found, skipping mount tests")
}
fusermountPath, err := exec.LookPath("fusermount")
if err != nil {
t.Skip("fusermount not found, skipping mount tests")
}
tests := []struct {
name string
mountSIF string
mountPath string
opts []UnmountOpt
wantErr bool
wantUnmounted bool
}{
{
name: "Mounted",
mountSIF: filepath.Join(corpus, "one-group.sif"),
mountPath: t.TempDir(),
wantErr: false,
wantUnmounted: true,
},
{
name: "NotMounted",
mountSIF: "",
mountPath: t.TempDir(),
wantErr: true,
},
{
name: "NotSquashfuse",
mountSIF: "",
mountPath: "/dev",
wantErr: true,
},
{
name: "FusermountBare",
mountSIF: "",
mountPath: t.TempDir(),
opts: []UnmountOpt{OptUnmountFusermountPath("fusermount")},
wantErr: true,
},
{
name: "FusermountValid",
mountSIF: filepath.Join(corpus, "one-group.sif"),
mountPath: t.TempDir(),
opts: []UnmountOpt{OptUnmountFusermountPath(fusermountPath)},
wantErr: false,
wantUnmounted: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if tt.mountSIF != "" {
err := Mount(context.Background(), tt.mountSIF, tt.mountPath)
if err != nil {
t.Fatal(err)
}
}
err := Unmount(context.Background(), tt.mountPath, tt.opts...)
if err != nil && !tt.wantErr {
t.Errorf("Unexpected error: %s", err)
}
if err == nil && tt.wantErr {
t.Error("Unexpected success")
}
mounted, err := isMounted(tt.mountPath)
if err != nil {
t.Fatal(err)
}
if tt.wantUnmounted && mounted {
t.Errorf("Expected %s to be unmounted, but it is mounted", tt.mountPath)
}
})
}
}
var errBadMountInfo = errors.New("bad mount info")
func isMounted(mountPath string) (bool, error) {
mountPath, err := filepath.Abs(mountPath)
if err != nil {
return false, err
}
mi, err := os.Open("/proc/self/mountinfo")
if err != nil {
return false, fmt.Errorf("failed to open /proc/self/mountinfo: %w", err)
}
defer mi.Close()
scanner := bufio.NewScanner(mi)
for scanner.Scan() {
fields := strings.Split(scanner.Text(), " ")
if len(fields) < 5 {
return false, fmt.Errorf("not enough mountinfo fields: %w", errBadMountInfo)
}
//nolint:lll
// 1348 63 0:77 / /tmp/siftool-mount-956028386 ro,nosuid,nodev,relatime shared:646 - fuse.squashfuse squashfuse ro,user_id=1000,group_id=100
mntTarget := fields[4]
if mntTarget == mountPath {
return true, nil
}
}
return false, nil
}
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