43 lines
751 B
Go
43 lines
751 B
Go
// Copyright (C) 2017 Marius Schellenberger
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// +build darwin dragonfly freebsd android linux netbsd openbsd solaris
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// +build !cgo
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package godrop
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import (
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"io/ioutil"
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"os"
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"regexp"
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)
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func readFile(name, file string) (id string, err error) {
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id = "-1"
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if name == "" {
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return
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}
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f, err := os.Open(file)
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if err != nil {
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return
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}
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b, err := ioutil.ReadAll(f)
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if err != nil {
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return
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}
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r := regexp.MustCompile(name + ":.*:(\\d+)")
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m := r.FindAllStringSubmatch(string(b), 1)
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if len(m) == 1 {
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if len(m[0]) == 2 {
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return m[0][1], nil
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}
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}
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return
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}
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func lookupUID(username string) (string, error) {
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return readFile(username, "/etc/passwd")
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}
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func lookupGID(name string) (string, error) {
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return readFile(name, "/etc/group")
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}
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