Change file permissions in Go (Golang)

os.Chmod() function can be used to change the permissions of an existing file. Below is the signature of the function

func Chmod(name string, mode FileMode) error

Code

package main

import (
    "fmt"
    "log"
    "os"
)

func main() {
    // Create new file
    new, err := os.Create("new.txt")
    if err != nil {
        log.Fatal(err)
    }
    defer new.Close()

    stats, err := os.Stat("new.txt")
    if err != nil {
        log.Fatal(err)
    }
    fmt.Printf("Permission File Before: %s\n", stats.Mode())
    err = os.Chmod("new.txt", 0700)
    if err != nil {
        log.Fatal(err)
    }

    stats, err = os.Stat("new.txt")
    if err != nil {
        log.Fatal(err)
    }
    fmt.Printf("Permission File After: %s\n", stats.Mode())
}

Output:

Permission File Before: -rw-r--r--
Permission File After: -rwx------