github.com/akerouanton/docker@v1.11.0-rc3/pkg/idtools/idtools_unix.go (about) 1 // +build !windows 2 3 package idtools 4 5 import ( 6 "os" 7 "path/filepath" 8 9 "github.com/docker/docker/pkg/system" 10 ) 11 12 func mkdirAs(path string, mode os.FileMode, ownerUID, ownerGID int, mkAll, chownExisting bool) error { 13 // make an array containing the original path asked for, plus (for mkAll == true) 14 // all path components leading up to the complete path that don't exist before we MkdirAll 15 // so that we can chown all of them properly at the end. If chownExisting is false, we won't 16 // chown the full directory path if it exists 17 var paths []string 18 if _, err := os.Stat(path); err != nil && os.IsNotExist(err) { 19 paths = []string{path} 20 } else if err == nil && chownExisting { 21 if err := os.Chown(path, ownerUID, ownerGID); err != nil { 22 return err 23 } 24 // short-circuit--we were called with an existing directory and chown was requested 25 return nil 26 } else if err == nil { 27 // nothing to do; directory path fully exists already and chown was NOT requested 28 return nil 29 } 30 31 if mkAll { 32 // walk back to "/" looking for directories which do not exist 33 // and add them to the paths array for chown after creation 34 dirPath := path 35 for { 36 dirPath = filepath.Dir(dirPath) 37 if dirPath == "/" { 38 break 39 } 40 if _, err := os.Stat(dirPath); err != nil && os.IsNotExist(err) { 41 paths = append(paths, dirPath) 42 } 43 } 44 if err := system.MkdirAll(path, mode); err != nil && !os.IsExist(err) { 45 return err 46 } 47 } else { 48 if err := os.Mkdir(path, mode); err != nil && !os.IsExist(err) { 49 return err 50 } 51 } 52 // even if it existed, we will chown the requested path + any subpaths that 53 // didn't exist when we called MkdirAll 54 for _, pathComponent := range paths { 55 if err := os.Chown(pathComponent, ownerUID, ownerGID); err != nil { 56 return err 57 } 58 } 59 return nil 60 }