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authorGiuseppe Scrivano <gscrivan@redhat.com>2019-03-29 11:32:02 +0100
committerGiuseppe Scrivano <gscrivan@redhat.com>2019-03-29 12:01:13 +0100
commitca38ca49b8f9c670e3d8a4da1a43a357c83f3f50 (patch)
tree6b494f44d715b036debac02f2b61ad41b58db393
parent2fa9861d788d821b6089becf3f3833b79d08d443 (diff)
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utils: call GetRootlessRuntimeDir once
use a sync.Once to potentially avoid multiple system calls everytime the function is called. Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
-rw-r--r--pkg/util/utils.go69
1 files changed, 43 insertions, 26 deletions
diff --git a/pkg/util/utils.go b/pkg/util/utils.go
index 19b2c44be..136f8fadd 100644
--- a/pkg/util/utils.go
+++ b/pkg/util/utils.go
@@ -5,6 +5,7 @@ import (
"os"
"path/filepath"
"strings"
+ "sync"
"syscall"
"time"
@@ -181,38 +182,54 @@ func ParseIDMapping(UIDMapSlice, GIDMapSlice []string, subUIDMap, subGIDMap stri
return &options, nil
}
+var (
+ rootlessRuntimeDirOnce sync.Once
+ rootlessRuntimeDir string
+)
+
// GetRootlessRuntimeDir returns the runtime directory when running as non root
func GetRootlessRuntimeDir() (string, error) {
- 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
+ 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 == "" {
- home := os.Getenv("HOME")
- if home == "" {
- return "", fmt.Errorf("neither XDG_RUNTIME_DIR nor HOME was set non-empty")
+ 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
+ }
}
- resolvedHome, err := filepath.EvalSymlinks(home)
- if err != nil {
- return "", errors.Wrapf(err, "cannot resolve %s", home)
+ 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")
}
- runtimeDir = filepath.Join(resolvedHome, "rundir")
+ rootlessRuntimeDir = runtimeDir
+ })
+
+ if rootlessRuntimeDirError != nil {
+ return "", rootlessRuntimeDirError
}
- return runtimeDir, nil
+ return rootlessRuntimeDir, nil
}
// GetRootlessDirInfo returns the parent path of where the storage for containers and