[Golang] Find Oldest Modified File in Directory
Find oldest modified file in the directory, excluding sub-directories, in Go. We use ioutil.ReadDir to read information of files and find the oldest modified time of file. ioutil.ReadDir does not read sub-directories. If you need to read also sub-directories, use filepath.Walk instead.
import (
"io/ioutil"
"os"
"time"
)
func FindOldestFile(dir string) (oldestFile os.FileInfo, err error) {
files, err := ioutil.ReadDir(dir)
if err != nil {
return
}
oldestTime := time.Now()
for _, file := range files {
if file.Mode().IsRegular() && file.ModTime().Before(oldestTime) {
oldestFile = file
oldestTime = file.ModTime()
}
}
if oldestFile == nil {
err = os.ErrNotExist
}
return
}
Tested on: Ubuntu Linux 17.10, Go 1.10.1
References
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