blob: bb854f242e2f1f556cda496027e7651471fafc33 [file] [log] [blame]
// Copyright 2015 The Vanadium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package internal
import (
"os"
"path/filepath"
"strings"
"v.io/v23/context"
"v.io/v23/security"
"v.io/v23/verror"
)
func globChildren(ctx *context.T, call security.Call, serverConfig *serverConfig) (<-chan string, error) {
n := findRoles(ctx, call, serverConfig.root)
suffix := call.Suffix()
if len(suffix) > 0 {
n = n.find(strings.Split(suffix, "/"), false)
}
if n == nil {
return nil, verror.New(verror.ErrNoExistOrNoAccess, ctx)
}
ch := make(chan string, len(n.children))
for c := range n.children {
ch <- c
}
close(ch)
return ch, nil
}
// findRoles finds all the roles to which the caller has access.
func findRoles(ctx *context.T, call security.Call, root string) *node {
blessingNames, _ := security.RemoteBlessingNames(ctx, call)
tree := newNode()
filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
if info.IsDir() || !strings.HasSuffix(path, ".conf") {
return nil
}
c, err := loadExpandedConfig(path, nil)
if err != nil {
return nil
}
if !hasAccess(c, blessingNames) {
return nil
}
relPath, err := filepath.Rel(root, path)
if err != nil {
return nil
}
tree.find(strings.Split(strings.TrimSuffix(relPath, ".conf"), string(filepath.Separator)), true)
return nil
})
return tree
}
type node struct {
children map[string]*node
}
func newNode() *node {
return &node{children: make(map[string]*node)}
}
func (n *node) find(names []string, create bool) *node {
for {
if len(names) == 0 {
return n
}
if next, ok := n.children[names[0]]; ok {
n = next
names = names[1:]
continue
}
if create {
nn := newNode()
n.children[names[0]] = nn
n = nn
names = names[1:]
continue
}
return nil
}
}