dotcloud/docker

//go:build linux || freebsd

package graphtest // import "github.com/docker/docker/daemon/graphdriver/graphtest"

import (
    "os"
    "path/filepath"
    "syscall"
    "testing"

    contdriver "github.com/containerd/continuity/driver"
    "github.com/docker/docker/daemon/graphdriver"
    "golang.org/x/sys/unix"
    "gotest.tools/v3/assert"
    is "gotest.tools/v3/assert/cmp"
)

func verifyFile(t testing.TB, path string, mode os.FileMode, uid, gid uint32) {
    fi, err := os.Stat(path)
    assert.NilError(t, err)

    actual := fi.Mode()
    assert.Check(t, is.Equal(mode&os.ModeType, actual&os.ModeType), path)
    assert.Check(t, is.Equal(mode&os.ModePerm, actual&os.ModePerm), path)
    assert.Check(t, is.Equal(mode&os.ModeSticky, actual&os.ModeSticky), path)
    assert.Check(t, is.Equal(mode&os.ModeSetuid, actual&os.ModeSetuid), path)
    assert.Check(t, is.Equal(mode&os.ModeSetgid, actual&os.ModeSetgid), path)

    if stat, ok := fi.Sys().(*syscall.Stat_t); ok {
        assert.Check(t, is.Equal(uid, stat.Uid), path)
        assert.Check(t, is.Equal(gid, stat.Gid), path)
    }
}

func createBase(t testing.TB, driver graphdriver.Driver, name string) {
    // We need to be able to set any perms
    oldmask := unix.Umask(0)
    defer unix.Umask(oldmask)

    err := driver.CreateReadWrite(name, "", nil)
    assert.NilError(t, err)

    dirFS, err := driver.Get(name, "")
    assert.NilError(t, err)
    defer driver.Put(name)

    subdir := filepath.Join(dirFS, "a subdir")
    assert.NilError(t, os.Mkdir(subdir, 0o705|os.ModeSticky))
    assert.NilError(t, contdriver.LocalDriver.Lchown(subdir, 1, 2))

    file := filepath.Join(dirFS, "a file")
    err = os.WriteFile(file, []byte("Some data"), 0o222|os.ModeSetuid)
    assert.NilError(t, err)
}

func verifyBase(t testing.TB, driver graphdriver.Driver, name string) {
    dirFS, err := driver.Get(name, "")
    assert.NilError(t, err)
    defer driver.Put(name)

    subdir := filepath.Join(dirFS, "a subdir")
    verifyFile(t, subdir, 0o705|os.ModeDir|os.ModeSticky, 1, 2)

    file := filepath.Join(dirFS, "a file")
    verifyFile(t, file, 0o222|os.ModeSetuid, 0, 0)

    files, err := readDir(dirFS)
    assert.NilError(t, err)
    assert.Check(t, is.Len(files, 2))
}