/
file_access.go
145 lines (125 loc) · 2.61 KB
/
file_access.go
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package driver
import (
"io/ioutil"
"os"
"strconv"
"strings"
"syscall"
)
type fileObject struct {
Path string
File *os.File
}
func (attrib *fileObject) Exists() bool {
return fileExists(attrib.Path)
}
func (attrib *fileObject) Open() (err error) {
attrib.File, err = os.OpenFile(attrib.Path, os.O_RDWR|syscall.O_NONBLOCK, 0660)
return err
}
func (attrib *fileObject) OpenRO() (err error) {
attrib.File, err = os.OpenFile(attrib.Path, os.O_RDONLY, 0444)
return err
}
func (attrib *fileObject) OpenWO() (err error) {
attrib.File, err = os.OpenFile(attrib.Path, os.O_WRONLY, 0444)
return err
}
func (attrib *fileObject) Close() (err error) {
err = attrib.File.Close()
attrib.File = nil
return err
}
func (attrib *fileObject) Read() (str string, err error) {
if attrib.File == nil {
err = attrib.OpenRO()
if err != nil {
return
}
defer func() {
e := attrib.Close()
if err == nil {
err = e
}
}()
}
attrib.File.Seek(0, os.SEEK_SET)
data, err := ioutil.ReadAll(attrib.File)
if err != nil {
return "", err
}
return string(data), nil
}
func (attrib *fileObject) Write(value string) (err error) {
if attrib.File == nil {
err = attrib.OpenWO()
if err != nil {
return
}
defer func() {
e := attrib.Close()
if err == nil {
err = e
}
}()
}
attrib.File.Seek(0, os.SEEK_SET)
_, err = attrib.File.WriteString(value)
return err
}
func (attrib *fileObject) ReadInt() (value int, err error) {
s, err := attrib.Read()
if err != nil {
return 0, err
}
s = strings.Trim(s, "\n")
value, err = strconv.Atoi(s)
if err != nil {
return 0, err
}
return value, err
}
func (attrib *fileObject) WriteInt(value int) (err error) {
return attrib.Write(strconv.Itoa(value))
}
func lsFilesWithPrefix(dir string, filePrefix string, ignoreDir bool) ([]string, error) {
var desiredFiles []string
f, err := os.Open(dir)
if err != nil {
return nil, err
}
defer f.Close()
fileInfos, err := f.Readdir(-1)
if err != nil {
return nil, err
}
for i := range fileInfos {
if ignoreDir && fileInfos[i].IsDir() {
continue
}
if filePrefix == "" ||
strings.Contains(fileInfos[i].Name(), filePrefix) {
desiredFiles = append(desiredFiles, fileInfos[i].Name())
}
}
return desiredFiles, nil
}
func lsDirs(dir string) ([]string, error) {
var dirList []string
f, err := os.Open(dir)
if err != nil {
return nil, err
}
defer f.Close()
fileInfos, err := f.Readdir(-1)
if err != nil {
return nil, err
}
for i := range fileInfos {
dirList = append(dirList, fileInfos[i].Name())
}
return dirList, nil
}
func createDir(dir string) error {
return os.MkdirAll(dir, 0755)
}