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dhcp: persist domain name to resolv.conf if specified

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This commit is contained in:
Michael Stapelberg 2017-09-19 14:48:36 +02:00
parent 6127f9566e
commit 32e8b6dd34
1 changed files with 7 additions and 1 deletions
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8
cmd/dhcp/dhcp.go
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@ -245,7 +245,13 @@ func main() {
if err := os.Remove("/etc/resolv.conf"); err != nil && !os.IsNotExist(err) { if err := os.Remove("/etc/resolv.conf"); err != nil && !os.IsNotExist(err) {
log.Fatalf("resolv.conf: %v", err) log.Fatalf("resolv.conf: %v", err)
} }
if err := ioutil.WriteFile("/etc/resolv.conf", []byte(fmt.Sprintf("nameserver %v\n", net.IP(b))), 0644); err != nil { var lines []string
if domain, ok := opts[dhcp4.OptionDomainName]; ok {
lines = append(lines, fmt.Sprintf("domain %s", string(domain)))
lines = append(lines, fmt.Sprintf("search %s", string(domain)))
}
lines = append(lines, fmt.Sprintf("nameserver %v", net.IP(b)))
if err := ioutil.WriteFile("/etc/resolv.conf", []byte(strings.Join(lines, "\n")+"\n"), 0644); err != nil {
log.Fatalf("resolv.conf: %v", err) log.Fatalf("resolv.conf: %v", err)
} }
} }