Ophestra Umiker
289e681c41
Add convenience functions for copying files to owner readable targets and LookPath comma ok wrapper. Signed-off-by: Ophestra Umiker <cat@ophivana.moe>
63 lines
1.1 KiB
Go
63 lines
1.1 KiB
Go
package main
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import (
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"errors"
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"fmt"
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"io"
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"io/fs"
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"os"
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"os/exec"
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)
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const (
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systemdCheckPath = "/run/systemd/system"
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)
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// https://www.freedesktop.org/software/systemd/man/sd_booted.html
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func sdBooted() bool {
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_, err := os.Stat(systemdCheckPath)
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if err != nil {
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if verbose {
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if errors.Is(err, fs.ErrNotExist) {
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fmt.Println("System not booted through systemd")
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} else {
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fmt.Println("Error accessing", systemdCheckPath+":", err.Error())
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}
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}
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return false
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}
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return true
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}
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func which(file string) (string, bool) {
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path, err := exec.LookPath(file)
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return path, err == nil
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}
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func copyFile(dst, src string) error {
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srcD, err := os.Open(src)
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if err != nil {
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return err
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}
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defer func() {
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if srcD.Close() != nil {
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// unreachable
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panic("src file closed prematurely")
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}
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}()
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dstD, err := os.OpenFile(dst, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
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if err != nil {
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return err
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}
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defer func() {
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if dstD.Close() != nil {
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// unreachable
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panic("dst file closed prematurely")
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}
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}()
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_, err = io.Copy(dstD, srcD)
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return err
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}
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