hardcoresushi/libgocryptfs
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fusefronted: preserve owner for device nodes and sockets

Browse Source 
https://github.com/rfjakob/gocryptfs/issues/64
This commit is contained in:
Jakob Unterwurzacher 2016-11-28 23:09:47 +01:00
parent a66440c668
commit e3c5e3f1c8
2 changed files with 21 additions and 13 deletions
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31
internal/fusefrontend/fs.go
View File

@ -195,36 +195,43 @@ func (fs *FS) Mknod(path string, mode uint32, dev uint32, context *fuse.Context)
if fs.isFiltered(path) {
return fuse.EPERM
}
cPath, err := fs.encryptPath(path)
cPath, err := fs.getBackingPath(path)
if err != nil {
return fuse.ToStatus(err)
}
// Handle long file name
// Create ".name" file to store long file name
cName := filepath.Base(cPath)
if nametransform.IsLongContent(cName) {
dirfd, err := os.Open(filepath.Dir(cPath))
var dirfd *os.File
dirfd, err = os.Open(filepath.Dir(cPath))
if err != nil {
return fuse.ToStatus(err)
}
defer dirfd.Close()
// Create ".name"
err = fs.nameTransform.WriteLongName(dirfd, cName, path)
if err != nil {
return fuse.ToStatus(err)
}
// Create device node
err = syscallcompat.Mknodat(int(dirfd.Fd()), cName, uint32(mode), int(dev))
// Create "gocryptfs.longfile." device node
err = syscallcompat.Mknodat(int(dirfd.Fd()), cName, mode, int(dev))
if err != nil {
nametransform.DeleteLongName(dirfd, cName)
}
} else {
// Create regular device node
err = syscall.Mknod(cPath, mode, int(dev))
}
if err != nil {
return fuse.ToStatus(err)
}
return fs.FileSystem.Mknod(cPath, mode, dev, context)
// Set owner
if fs.args.PreserveOwner {
err = os.Lchown(cPath, int(context.Owner.Uid), int(context.Owner.Gid))
if err != nil {
tlog.Warn.Printf("Mknod: Lchown failed: %v", err)
}
}
return fuse.OK
}
// Truncate implements pathfs.Filesystem.

3
internal/nametransform/longnames.go
View File

@ -57,7 +57,8 @@ func NameType(cName string) int {
return LongNameContent
}
// IsLongContent returns true if "cName" is the content store of a long name file.
// IsLongContent returns true if "cName" is the content store of a long name
// file (looks like "gocryptfs.longname.[sha256]").
func IsLongContent(cName string) bool {
return NameType(cName) == LongNameContent
}