70 lines
1.8 KiB
Go
70 lines
1.8 KiB
Go
// +build linux darwin
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package config
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import (
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"fmt"
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"os"
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"path/filepath"
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"sync"
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"syscall"
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"github.com/containers/common/pkg/unshare"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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)
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var (
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rootlessRuntimeDirOnce sync.Once
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rootlessRuntimeDir string
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)
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// getRuntimeDir returns the runtime directory
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func getRuntimeDir() (string, error) {
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var rootlessRuntimeDirError error
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rootlessRuntimeDirOnce.Do(func() {
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runtimeDir := os.Getenv("XDG_RUNTIME_DIR")
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uid := fmt.Sprintf("%d", unshare.GetRootlessUID())
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if runtimeDir == "" {
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tmpDir := filepath.Join("/run", "user", uid)
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if err := os.MkdirAll(tmpDir, 0700); err != nil {
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logrus.Debugf("unable to make temp dir %s", tmpDir)
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}
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st, err := os.Stat(tmpDir)
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if err == nil && int(st.Sys().(*syscall.Stat_t).Uid) == os.Geteuid() && st.Mode().Perm() == 0700 {
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runtimeDir = tmpDir
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}
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}
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if runtimeDir == "" {
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tmpDir := filepath.Join(os.TempDir(), fmt.Sprintf("run-%s", uid))
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if err := os.MkdirAll(tmpDir, 0700); err != nil {
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logrus.Debugf("unable to make temp dir %s", tmpDir)
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}
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st, err := os.Stat(tmpDir)
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if err == nil && int(st.Sys().(*syscall.Stat_t).Uid) == os.Geteuid() && st.Mode().Perm() == 0700 {
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runtimeDir = tmpDir
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}
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}
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if runtimeDir == "" {
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home := os.Getenv("HOME")
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if home == "" {
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rootlessRuntimeDirError = fmt.Errorf("neither XDG_RUNTIME_DIR nor HOME was set non-empty")
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return
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}
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resolvedHome, err := filepath.EvalSymlinks(home)
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if err != nil {
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rootlessRuntimeDirError = errors.Wrapf(err, "cannot resolve %s", home)
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return
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}
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runtimeDir = filepath.Join(resolvedHome, "rundir")
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}
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rootlessRuntimeDir = runtimeDir
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})
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if rootlessRuntimeDirError != nil {
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return "", rootlessRuntimeDirError
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}
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return rootlessRuntimeDir, nil
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}
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