mirror of https://github.com/containers/podman.git
95 lines
2.4 KiB
Go
95 lines
2.4 KiB
Go
// +build linux darwin
|
|
|
|
package util
|
|
|
|
// TODO once rootless function is consolidated under libpod, we
|
|
// should work to take darwin from this
|
|
|
|
import (
|
|
"fmt"
|
|
"github.com/containers/libpod/pkg/rootless"
|
|
"github.com/pkg/errors"
|
|
"os"
|
|
"path/filepath"
|
|
"sync"
|
|
"syscall"
|
|
)
|
|
|
|
const (
|
|
_cgroup2SuperMagic = 0x63677270
|
|
)
|
|
|
|
var (
|
|
isUnifiedOnce sync.Once
|
|
isUnified bool
|
|
isUnifiedErr error
|
|
)
|
|
|
|
// IsCgroup2UnifiedMode returns whether we are running in cgroup 2 unified mode.
|
|
func IsCgroup2UnifiedMode() (bool, error) {
|
|
isUnifiedOnce.Do(func() {
|
|
var st syscall.Statfs_t
|
|
if err := syscall.Statfs("/sys/fs/cgroup", &st); err != nil {
|
|
isUnified, isUnifiedErr = false, err
|
|
} else {
|
|
isUnified, isUnifiedErr = st.Type == _cgroup2SuperMagic, nil
|
|
}
|
|
})
|
|
return isUnified, isUnifiedErr
|
|
}
|
|
|
|
// GetRootlessRuntimeDir returns the runtime directory when running as non root
|
|
func GetRootlessRuntimeDir() (string, error) {
|
|
var rootlessRuntimeDirError error
|
|
|
|
rootlessRuntimeDirOnce.Do(func() {
|
|
runtimeDir := os.Getenv("XDG_RUNTIME_DIR")
|
|
uid := fmt.Sprintf("%d", rootless.GetRootlessUID())
|
|
if runtimeDir == "" {
|
|
tmpDir := filepath.Join("/run", "user", uid)
|
|
os.MkdirAll(tmpDir, 0700)
|
|
st, err := os.Stat(tmpDir)
|
|
if err == nil && int(st.Sys().(*syscall.Stat_t).Uid) == os.Geteuid() && st.Mode().Perm() == 0700 {
|
|
runtimeDir = tmpDir
|
|
}
|
|
}
|
|
if runtimeDir == "" {
|
|
tmpDir := filepath.Join(os.TempDir(), fmt.Sprintf("run-%s", uid))
|
|
os.MkdirAll(tmpDir, 0700)
|
|
st, err := os.Stat(tmpDir)
|
|
if err == nil && int(st.Sys().(*syscall.Stat_t).Uid) == os.Geteuid() && st.Mode().Perm() == 0700 {
|
|
runtimeDir = tmpDir
|
|
}
|
|
}
|
|
if runtimeDir == "" {
|
|
home := os.Getenv("HOME")
|
|
if home == "" {
|
|
rootlessRuntimeDirError = fmt.Errorf("neither XDG_RUNTIME_DIR nor HOME was set non-empty")
|
|
return
|
|
}
|
|
resolvedHome, err := filepath.EvalSymlinks(home)
|
|
if err != nil {
|
|
rootlessRuntimeDirError = errors.Wrapf(err, "cannot resolve %s", home)
|
|
return
|
|
}
|
|
runtimeDir = filepath.Join(resolvedHome, "rundir")
|
|
}
|
|
rootlessRuntimeDir = runtimeDir
|
|
})
|
|
|
|
if rootlessRuntimeDirError != nil {
|
|
return "", rootlessRuntimeDirError
|
|
}
|
|
return rootlessRuntimeDir, nil
|
|
}
|
|
|
|
// GetRootlessPauseProcessPidPath returns the path to the file that holds the pid for
|
|
// the pause process
|
|
func GetRootlessPauseProcessPidPath() (string, error) {
|
|
runtimeDir, err := GetRootlessRuntimeDir()
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return filepath.Join(runtimeDir, "libpod", "pause.pid"), nil
|
|
}
|