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// Copyright (c) 2019-2023, Sylabs Inc. All rights reserved.
// This software is licensed under a 3-clause BSD license. Please consult the
// LICENSE.md file distributed with the sources of this project regarding your
// rights to use or distribute this software.
package squashfs
import (
"context"
"fmt"
"os"
"os/exec"
"path/filepath"
"strings"
"github.com/sylabs/singularity/v4/internal/pkg/util/bin"
"github.com/sylabs/singularity/v4/pkg/sylog"
)
func FUSEMount(ctx context.Context, offset uint64, path, mountPath string) error {
args := []string{
"-o", fmt.Sprintf("ro,offset=%d,uid=%d,gid=%d", offset, os.Getuid(), os.Getgid()),
filepath.Clean(path),
filepath.Clean(mountPath),
}
squashfuse, err := bin.FindBin("squashfuse")
if err != nil {
return err
}
cmd := exec.CommandContext(ctx, squashfuse, args...)
if outputBytes, err := cmd.CombinedOutput(); err != nil {
return fmt.Errorf(
"failed to mount: %w (cmdline: %q; output: %q)", err,
strings.Join(append([]string{squashfuse}, args...), " "),
string(outputBytes),
)
}
return nil
}
func FUSEUnmount(ctx context.Context, mountPath string) error {
args := []string{
"-u",
filepath.Clean(mountPath),
}
fusermount, err := bin.FindBin("fusermount")
if err != nil {
return err
}
cmd := exec.CommandContext(ctx, fusermount, args...)
sylog.Debugf("Executing %s %s", fusermount, strings.Join(args, " "))
if err := cmd.Run(); err != nil {
return fmt.Errorf("failed to unmount: %w", err)
}
return nil
}
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