a8608b5b67
About github.com/opencontainers/runc/libcontainer/user:
According to 195d8d544a
this package has two functions:
- Have a static implementation of user lookup, which is now supported in the
os/user stdlib package with the osusergo build tag, but wasn't at the time.
- Have extra functions that os/user doesn't have, but none of those are used
in homedir.
Since https://github.com/moby/moby/pull/11287, homedir depended directly on
libcontainer's user package for CurrentUser().
This is being replaced with os/user.Current(), because all of our static
binaries are compiled with the osusergo tag, and for dynamic libraries it
is more correct to use libc's implementation than parsing /etc/passwd.
About github.com/docker/docker/pkg/idtools:
Only dependency was from GetStatic() which uses idtools.LookupUID(uid).
The implementation of idtools.LookupUID just calls to
github.com/opencontainers/runc/libcontainer/user.LookupUid or fallbacks
to exec-ing to getent (since https://github.com/moby/moby/pull/27599).
This patch replaces calls to homedir.GetStatic by homedir.Get(), opting out
of supporting nss lookups in static binaries via exec-ing to getent for
the homedir package.
If homedir package users need to support nss lookups, they are advised
to compile dynamically instead.
Signed-off-by: Tibor Vass <tibor@docker.com>
93 lines
2.6 KiB
Go
93 lines
2.6 KiB
Go
package homedir // import "github.com/docker/docker/pkg/homedir"
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import (
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"errors"
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"os"
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"path/filepath"
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"strings"
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)
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// GetRuntimeDir returns XDG_RUNTIME_DIR.
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// XDG_RUNTIME_DIR is typically configured via pam_systemd.
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// GetRuntimeDir returns non-nil error if XDG_RUNTIME_DIR is not set.
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//
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// See also https://standards.freedesktop.org/basedir-spec/latest/ar01s03.html
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func GetRuntimeDir() (string, error) {
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if xdgRuntimeDir := os.Getenv("XDG_RUNTIME_DIR"); xdgRuntimeDir != "" {
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return xdgRuntimeDir, nil
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}
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return "", errors.New("could not get XDG_RUNTIME_DIR")
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}
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// StickRuntimeDirContents sets the sticky bit on files that are under
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// XDG_RUNTIME_DIR, so that the files won't be periodically removed by the system.
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//
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// StickyRuntimeDir returns slice of sticked files.
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// StickyRuntimeDir returns nil error if XDG_RUNTIME_DIR is not set.
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//
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// See also https://standards.freedesktop.org/basedir-spec/latest/ar01s03.html
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func StickRuntimeDirContents(files []string) ([]string, error) {
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runtimeDir, err := GetRuntimeDir()
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if err != nil {
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// ignore error if runtimeDir is empty
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return nil, nil
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}
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runtimeDir, err = filepath.Abs(runtimeDir)
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if err != nil {
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return nil, err
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}
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var sticked []string
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for _, f := range files {
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f, err = filepath.Abs(f)
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if err != nil {
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return sticked, err
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}
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if strings.HasPrefix(f, runtimeDir+"/") {
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if err = stick(f); err != nil {
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return sticked, err
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}
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sticked = append(sticked, f)
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}
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}
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return sticked, nil
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}
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func stick(f string) error {
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st, err := os.Stat(f)
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if err != nil {
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return err
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}
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m := st.Mode()
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m |= os.ModeSticky
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return os.Chmod(f, m)
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}
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// GetDataHome returns XDG_DATA_HOME.
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// GetDataHome returns $HOME/.local/share and nil error if XDG_DATA_HOME is not set.
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//
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// See also https://standards.freedesktop.org/basedir-spec/latest/ar01s03.html
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func GetDataHome() (string, error) {
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if xdgDataHome := os.Getenv("XDG_DATA_HOME"); xdgDataHome != "" {
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return xdgDataHome, nil
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}
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home := os.Getenv("HOME")
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if home == "" {
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return "", errors.New("could not get either XDG_DATA_HOME or HOME")
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}
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return filepath.Join(home, ".local", "share"), nil
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}
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// GetConfigHome returns XDG_CONFIG_HOME.
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// GetConfigHome returns $HOME/.config and nil error if XDG_CONFIG_HOME is not set.
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//
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// See also https://standards.freedesktop.org/basedir-spec/latest/ar01s03.html
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func GetConfigHome() (string, error) {
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if xdgConfigHome := os.Getenv("XDG_CONFIG_HOME"); xdgConfigHome != "" {
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return xdgConfigHome, nil
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}
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home := os.Getenv("HOME")
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if home == "" {
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return "", errors.New("could not get either XDG_CONFIG_HOME or HOME")
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}
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return filepath.Join(home, ".config"), nil
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}
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