/usr/share/gocode/src/github.com/lxc/lxd/lxc/file.go is in golang-github-lxc-lxd-dev 2.0.2-0ubuntu1~16.04.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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import (
"fmt"
"io"
"io/ioutil"
"os"
"path"
"path/filepath"
"strconv"
"strings"
"syscall"
"github.com/lxc/lxd"
"github.com/lxc/lxd/shared"
"github.com/lxc/lxd/shared/gnuflag"
"github.com/lxc/lxd/shared/i18n"
"github.com/lxc/lxd/shared/termios"
)
type fileCmd struct {
uid int
gid int
mode string
}
func (c *fileCmd) showByDefault() bool {
return true
}
func (c *fileCmd) usage() string {
return i18n.G(
`Manage files on a container.
lxc file pull <source> [<source>...] <target>
lxc file push [--uid=UID] [--gid=GID] [--mode=MODE] <source> [<source>...] <target>
lxc file edit <file>
<source> in the case of pull, <target> in the case of push and <file> in the case of edit are <container name>/<path>`)
}
func (c *fileCmd) flags() {
gnuflag.IntVar(&c.uid, "uid", -1, i18n.G("Set the file's uid on push"))
gnuflag.IntVar(&c.gid, "gid", -1, i18n.G("Set the file's gid on push"))
gnuflag.StringVar(&c.mode, "mode", "", i18n.G("Set the file's perms on push"))
}
func (c *fileCmd) push(config *lxd.Config, args []string) error {
if len(args) < 2 {
return errArgs
}
target := args[len(args)-1]
pathSpec := strings.SplitN(target, "/", 2)
if len(pathSpec) != 2 {
return fmt.Errorf(i18n.G("Invalid target %s"), target)
}
targetPath := pathSpec[1]
remote, container := config.ParseRemoteAndContainer(pathSpec[0])
d, err := lxd.NewClient(config, remote)
if err != nil {
return err
}
mode := os.FileMode(0755)
if c.mode != "" {
if len(c.mode) == 3 {
c.mode = "0" + c.mode
}
m, err := strconv.ParseInt(c.mode, 0, 0)
if err != nil {
return err
}
mode = os.FileMode(m)
}
uid := 0
if c.uid >= 0 {
uid = c.uid
}
gid := 0
if c.gid >= 0 {
gid = c.gid
}
_, targetfilename := filepath.Split(targetPath)
var sourcefilenames []string
for _, fname := range args[:len(args)-1] {
if !strings.HasPrefix(fname, "--") {
sourcefilenames = append(sourcefilenames, fname)
}
}
if (targetfilename != "") && (len(sourcefilenames) > 1) {
return errArgs
}
/* Make sure all of the files are accessible by us before trying to
* push any of them. */
var files []*os.File
for _, f := range sourcefilenames {
var file *os.File
if f == "-" {
file = os.Stdin
} else {
file, err = os.Open(f)
if err != nil {
return err
}
}
defer file.Close()
files = append(files, file)
}
for _, f := range files {
fpath := targetPath
if targetfilename == "" {
fpath = path.Join(fpath, path.Base(f.Name()))
}
if c.mode == "" || c.uid == -1 || c.gid == -1 {
fMode, fUid, fGid, err := c.getOwner(f)
if err != nil {
return err
}
if c.mode == "" {
mode = fMode
}
if c.uid == -1 {
uid = fUid
}
if c.gid == -1 {
gid = fGid
}
}
err = d.PushFile(container, fpath, gid, uid, mode, f)
if err != nil {
return err
}
}
return nil
}
func (c *fileCmd) pull(config *lxd.Config, args []string) error {
if len(args) < 2 {
return errArgs
}
target := args[len(args)-1]
targetIsDir := false
sb, err := os.Stat(target)
if err != nil && !os.IsNotExist(err) {
return err
}
/*
* If the path exists, just use it. If it doesn't exist, it might be a
* directory in one of two cases:
* 1. Someone explicitly put "/" at the end
* 2. Someone provided more than one source. In this case the target
* should be a directory so we can save all the files into it.
*/
if err == nil {
targetIsDir = sb.IsDir()
if !targetIsDir && len(args)-1 > 1 {
return fmt.Errorf(i18n.G("More than one file to download, but target is not a directory"))
}
} else if strings.HasSuffix(target, string(os.PathSeparator)) || len(args)-1 > 1 {
if err := os.MkdirAll(target, 0755); err != nil {
return err
}
targetIsDir = true
}
for _, f := range args[:len(args)-1] {
pathSpec := strings.SplitN(f, "/", 2)
if len(pathSpec) != 2 {
return fmt.Errorf(i18n.G("Invalid source %s"), f)
}
remote, container := config.ParseRemoteAndContainer(pathSpec[0])
d, err := lxd.NewClient(config, remote)
if err != nil {
return err
}
_, _, _, buf, err := d.PullFile(container, pathSpec[1])
if err != nil {
return err
}
var targetPath string
if targetIsDir {
targetPath = path.Join(target, path.Base(pathSpec[1]))
} else {
targetPath = target
}
var f *os.File
if targetPath == "-" {
f = os.Stdout
} else {
f, err = os.Create(targetPath)
if err != nil {
return err
}
defer f.Close()
}
_, err = io.Copy(f, buf)
if err != nil {
return err
}
}
return nil
}
func (c *fileCmd) edit(config *lxd.Config, args []string) error {
if len(args) != 1 {
return errArgs
}
// If stdin isn't a terminal, read text from it
if !termios.IsTerminal(int(syscall.Stdin)) {
return c.push(config, append([]string{os.Stdin.Name()}, args[0]))
}
// Create temp file
f, err := ioutil.TempFile("", "lxd_file_edit_")
fname := f.Name()
f.Close()
os.Remove(fname)
defer os.Remove(fname)
// Extract current value
err = c.pull(config, append([]string{args[0]}, fname))
if err != nil {
return err
}
_, err = shared.TextEditor(fname, []byte{})
if err != nil {
return err
}
err = c.push(config, append([]string{fname}, args[0]))
if err != nil {
return err
}
return nil
}
func (c *fileCmd) run(config *lxd.Config, args []string) error {
if len(args) < 1 {
return errArgs
}
switch args[0] {
case "push":
return c.push(config, args[1:])
case "pull":
return c.pull(config, args[1:])
case "edit":
return c.edit(config, args[1:])
default:
return errArgs
}
}
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