lib9p

Go 9P library.
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fs.go (1149B)

      1 // Package iofs provides a glue layer between fs.FS and lib9p.FS
      2 // The resulting file system is readonly.
      3 package iofs
      4 
      5 import (
      6 	"errors"
      7 	"io/fs"
      8 
      9 	"git.mtkn.jp/lib9p"
     10 )
     11 
     12 type FS struct {
     13 	fs      fs.FS
     14 	qidPool *QidPool
     15 }
     16 
     17 // NewFS converts the fs.FS to FS
     18 // It can then be used as the lib9p.FS argument for lib9p.NewServer.
     19 func NewFS(fsys fs.FS) *FS {
     20 	fs := &FS{
     21 		fs:      fsys,
     22 		qidPool: allocQidPool(),
     23 	}
     24 	return fs
     25 }
     26 
     27 func (fsys *FS) OpenFile(name string, flag int) (lib9p.File, error) {
     28 	if flag != lib9p.O_RDONLY {
     29 		return nil, errors.New("read only file system")
     30 	}
     31 	if name == "" {
     32 		name = "."
     33 	}
     34 	f, err := fsys.fs.Open(name)
     35 	if err != nil {
     36 		return nil, err
     37 	}
     38 	return &File{
     39 		fs:   fsys,
     40 		file: f,
     41 		path: name,
     42 	}, nil
     43 }
     44 
     45 // This function assumes that group and uid both exist and
     46 // the leader of group has the same name as group itself.
     47 func (fsys *FS) IsGroupLeader(group, uid string) bool {
     48 	return group == uid
     49 }
     50 
     51 // This function assumes that group and uid both exists and
     52 // only the member of group has the same name as group itself.
     53 func (fsys *FS) IsGroupMember(group, uid string) bool {
     54 	return group == uid
     55 }