First working version

[safcm/safcm.git] / cmd / safcm / fixperms.go

diff --git a/cmd/safcm/fixperms.go b/cmd/safcm/fixperms.go
new file mode 100644 (file)
index 0000000..6770934
--- /dev/null
+++ b/cmd/safcm/fixperms.go
@@ -0,0 +1,99 @@
+// "fixperms" sub-command: apply proper permissions in files/ directories
+
+// Copyright (C) 2021  Simon Ruderich
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package main
+
+import (
+       "fmt"
+       "io/fs"
+       "log"
+       "os"
+       "path/filepath"
+
+       "ruderich.org/simon/safcm/cmd/safcm/config"
+)
+
+func MainFixperms() error {
+       _, _, _, err := LoadBaseFiles()
+       if err != nil {
+               return fmt.Errorf("not in a safcm directory: %v", err)
+       }
+
+       xs, err := os.ReadDir(".")
+       if err != nil {
+               return err
+       }
+       for _, x := range xs {
+               if !x.IsDir() {
+                       continue
+               }
+               path := filepath.Join(x.Name(), "files")
+
+               err := filepath.WalkDir(path, fixpermsWalkDirFunc)
+               if err != nil {
+                       if os.IsNotExist(err) {
+                               continue
+                       }
+                       return fmt.Errorf("%s: %v", path, err)
+               }
+       }
+
+       return nil
+}
+
+func fixpermsWalkDirFunc(path string, d fs.DirEntry, err error) error {
+       if err != nil {
+               return err
+       }
+
+       info, err := d.Info()
+       if err != nil {
+               return err
+       }
+       typ := info.Mode().Type()
+       perm := config.FileModeToFullPerm(info.Mode())
+
+       if typ == 0 /* regular file */ {
+               if perm != 0644 && perm != 0755 {
+                       if perm&0111 != 0 /* executable */ {
+                               perm = 0755
+                       } else {
+                               perm = 0644
+                       }
+                       log.Printf("chmodding %q to %#o", path, perm)
+                       // This is safe because perm does not include
+                       // setuid/setgid/sticky which use different values in
+                       // FileMode.
+                       err := os.Chmod(path, fs.FileMode(perm))
+                       if err != nil {
+                               return err
+                       }
+               }
+       } else if typ == fs.ModeDir {
+               if perm != 0755 {
+                       perm = 0755
+                       log.Printf("chmodding %q to %#o", path, perm)
+                       err := os.Chmod(path, fs.FileMode(perm))
+                       if err != nil {
+                               return err
+                       }
+               }
+       }
+       // Other file types are caught by regular "sync"
+
+       return nil
+}