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cmd/cli: ensure goroutines that check DNS terminated

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So changes to DNS after ctrld stopped won't be reverted by the goroutine
itself. The problem happens rarely on darwin, because networksetup
command won't propagate config to /etc/resolv.conf if there is no
changes between multiple running.
This commit is contained in:
Cuong Manh Le
2024-08-08 01:25:49 +07:00
committed by Cuong Manh Le
parent 62a0ba8731
commit a007394f60
3 changed files with 42 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files
cmd/cli/resolvconf.go
+4 -1
View File
@@ -10,7 +10,7 @@ import (
// watchResolvConf watches any changes to /etc/resolv.conf file,
// and reverting to the original config set by ctrld.
func watchResolvConf(iface *net.Interface, ns []netip.Addr, setDnsFn func(iface *net.Interface, ns []netip.Addr) error) {
func (p *prog) watchResolvConf(iface *net.Interface, ns []netip.Addr, setDnsFn func(iface *net.Interface, ns []netip.Addr) error) {
resolvConfPath := "/etc/resolv.conf"
// Evaluating symbolics link to watch the target file that /etc/resolv.conf point to.
if rp, _ := filepath.EvalSymlinks(resolvConfPath); rp != "" {
@@ -34,6 +34,9 @@ func watchResolvConf(iface *net.Interface, ns []netip.Addr, setDnsFn func(iface
for {
select {
case <-p.stopCh:
mainLog.Load().Debug().Msgf("stopping watcher for %s", resolvConfPath)
return
case event, ok := <-watcher.Events:
if !ok {
return