63 lines
1.1 KiB
Go
63 lines
1.1 KiB
Go
package main
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"io/fs"
|
|
"os"
|
|
"os/exec"
|
|
)
|
|
|
|
const (
|
|
systemdCheckPath = "/run/systemd/system"
|
|
)
|
|
|
|
// https://www.freedesktop.org/software/systemd/man/sd_booted.html
|
|
func sdBooted() bool {
|
|
_, err := os.Stat(systemdCheckPath)
|
|
if err != nil {
|
|
if verbose {
|
|
if errors.Is(err, fs.ErrNotExist) {
|
|
fmt.Println("System not booted through systemd")
|
|
} else {
|
|
fmt.Println("Error accessing", systemdCheckPath+":", err.Error())
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
return true
|
|
}
|
|
|
|
func which(file string) (string, bool) {
|
|
path, err := exec.LookPath(file)
|
|
return path, err == nil
|
|
}
|
|
|
|
func copyFile(dst, src string) error {
|
|
srcD, err := os.Open(src)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer func() {
|
|
if srcD.Close() != nil {
|
|
// unreachable
|
|
panic("src file closed prematurely")
|
|
}
|
|
}()
|
|
|
|
dstD, err := os.OpenFile(dst, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer func() {
|
|
if dstD.Close() != nil {
|
|
// unreachable
|
|
panic("dst file closed prematurely")
|
|
}
|
|
}()
|
|
|
|
_, err = io.Copy(dstD, srcD)
|
|
return err
|
|
}
|