94 lines
2.6 KiB
Go
94 lines
2.6 KiB
Go
package permcheck
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import (
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"io/fs"
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"os"
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"path/filepath"
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"github.com/AdguardTeam/AdGuardHome/internal/aghos"
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"github.com/AdguardTeam/golibs/errors"
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"github.com/AdguardTeam/golibs/log"
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)
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// NeedsMigration returns true if AdGuard Home files need permission migration.
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//
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// TODO(a.garipov): Consider ways to detect this better.
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func NeedsMigration(confFilePath string) (ok bool) {
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s, err := aghos.Stat(confFilePath)
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if err != nil {
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if errors.Is(err, os.ErrNotExist) {
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// Likely a first run. Don't check.
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return false
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}
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log.Error("permcheck: checking if files need migration: %s", err)
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// Unexpected error. Try to migrate just in case.
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return true
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}
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return s.Mode().Perm() != aghos.DefaultPermFile
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}
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// Migrate attempts to change the permissions of AdGuard Home's files. It logs
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// the results at an appropriate level.
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func Migrate(workDir, dataDir, statsDir, querylogDir, confFilePath string) {
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chmodDir(workDir)
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chmodFile(confFilePath)
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// TODO(a.garipov): Put all paths in one place and remove this duplication.
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chmodDir(dataDir)
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chmodDir(filepath.Join(dataDir, "filters"))
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chmodFile(filepath.Join(dataDir, "sessions.db"))
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chmodFile(filepath.Join(dataDir, "leases.json"))
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if dataDir != querylogDir {
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chmodDir(querylogDir)
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}
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chmodFile(filepath.Join(querylogDir, "querylog.json"))
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chmodFile(filepath.Join(querylogDir, "querylog.json.1"))
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if dataDir != statsDir {
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chmodDir(statsDir)
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}
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chmodFile(filepath.Join(statsDir, "stats.db"))
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}
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// chmodDir changes the permissions of a single directory. The results are
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// logged at the appropriate level.
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func chmodDir(dirPath string) {
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chmodPath(dirPath, typeDir, aghos.DefaultPermDir)
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}
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// chmodFile changes the permissions of a single file. The results are logged
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// at the appropriate level.
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func chmodFile(filePath string) {
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chmodPath(filePath, typeFile, aghos.DefaultPermFile)
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}
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// chmodPath changes the permissions of a single filesystem entity. The results
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// are logged at the appropriate level.
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func chmodPath(entPath, fileType string, fm fs.FileMode) {
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err := aghos.Chmod(entPath, fm)
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if err == nil {
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log.Info("permcheck: changed permissions for %s %q", fileType, entPath)
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return
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} else if errors.Is(err, os.ErrNotExist) {
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log.Debug("permcheck: changing permissions for %s %q: %s", fileType, entPath, err)
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return
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}
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log.Error(
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"permcheck: SECURITY WARNING: cannot change permissions for %s %q to %#o: %s; "+
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"this can leave your system vulnerable, see "+
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"https://adguard-dns.io/kb/adguard-home/running-securely/#os-service-concerns",
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fileType,
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entPath,
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fm,
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err,
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)
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}
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