vfs: Add link permissions

vfs/vfscommon/options.go

@@ -100,6 +100,11 @@ var OptionsInfo = fs.Options{{
 	Default: FileMode(0666),
 	Help:    "File permissions",
 	Groups:  "VFS",
+}, {
+	Name:    "link_perms",
+	Default: FileMode(0666),
+	Help:    "Link permissions",
+	Groups:  "VFS",
 }, {
 	Name:    "vfs_case_insensitive",
 	Default: runtime.GOOS == "windows" || runtime.GOOS == "darwin", // default to true on Windows and Mac, false otherwise,
@@ -181,6 +186,7 @@ type Options struct {
 	GID                uint32        `config:"gid"`
 	DirPerms           FileMode      `config:"dir_perms"`
 	FilePerms          FileMode      `config:"file_perms"`
+	LinkPerms          FileMode      `config:"link_perms"`
 	ChunkSize          fs.SizeSuffix `config:"vfs_read_chunk_size"`       // if > 0 read files in chunks
 	ChunkSizeLimit     fs.SizeSuffix `config:"vfs_read_chunk_size_limit"` // if > ChunkSize double the chunk size after each chunk until reached
 	ChunkStreams       int           `config:"vfs_read_chunk_streams"`    // Number of download streams to use
@@ -208,7 +214,11 @@ func (opt *Options) Init() {
 	// Mask the permissions with the umask
 	opt.DirPerms &= ^opt.Umask
 	opt.FilePerms &= ^opt.Umask
+	opt.LinkPerms &= ^opt.Umask
 
 	// Make sure directories are returned as directories
 	opt.DirPerms |= FileMode(os.ModeDir)
+
+	// Make sure links are returned as links
+	opt.LinkPerms |= FileMode(os.ModeSymlink)
 }