mirror of
https://github.com/gravitational/teleport.git
synced 2026-09-24 16:17:11 +08:00
120 lines
2.9 KiB
Go
120 lines
2.9 KiB
Go
/*
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Copyright 2015 Gravitational, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package utils
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import (
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"io"
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"os"
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"path/filepath"
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"github.com/gravitational/trace"
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)
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// RemoveDirCloser removes directory and all it's contents
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// when Close is called
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type RemoveDirCloser struct {
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Path string
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}
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// Close removes directory and all it's contents
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func (r *RemoveDirCloser) Close() error {
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return trace.ConvertSystemError(os.RemoveAll(r.Path))
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}
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// IsFile returns true if a given file path points to an existing file
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func IsFile(fp string) bool {
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fi, err := os.Stat(fp)
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if err == nil {
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return !fi.IsDir()
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}
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return false
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}
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// IsDir is a helper function to quickly check if a given path is a valid directory
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func IsDir(dirPath string) bool {
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fi, err := os.Stat(dirPath)
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if err == nil {
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return fi.IsDir()
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}
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return false
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}
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// ReadAll is similarl to ioutil.ReadAll, except it doesn't use ever-increasing
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// internal buffer, instead asking for the exact buffer size.
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//
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// This is useful when you want to limit the sze of Read/Writes (websockets)
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func ReadAll(r io.Reader, bufsize int) (out []byte, err error) {
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buff := make([]byte, bufsize)
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n := 0
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for err == nil {
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n, err = r.Read(buff)
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if n > 0 {
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out = append(out, buff[:n]...)
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}
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}
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if err == io.EOF {
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err = nil
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}
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return out, err
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}
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// NormalizePath normalises path, evaluating symlinks and converting local
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// paths to absolute
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func NormalizePath(path string) (string, error) {
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s, err := filepath.Abs(path)
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if err != nil {
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return "", trace.ConvertSystemError(err)
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}
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abs, err := filepath.EvalSymlinks(s)
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if err != nil {
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return "", trace.ConvertSystemError(err)
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}
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return abs, nil
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}
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// OpenFile opens file and returns file handle
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func OpenFile(path string) (*os.File, error) {
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newPath, err := NormalizePath(path)
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if err != nil {
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return nil, trace.Wrap(err)
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}
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fi, err := os.Stat(newPath)
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if err != nil {
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return nil, trace.ConvertSystemError(err)
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}
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if fi.IsDir() {
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return nil, trace.BadParameter("%v is not a file", path)
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}
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f, err := os.Open(newPath)
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if err != nil {
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return nil, trace.ConvertSystemError(err)
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}
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return f, nil
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}
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// StatDir stats directory, returns error if file exists, but not a directory
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func StatDir(path string) (os.FileInfo, error) {
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fi, err := os.Stat(path)
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if err != nil {
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return nil, trace.ConvertSystemError(err)
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}
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if !fi.IsDir() {
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return nil, trace.BadParameter("%v is not a directory", path)
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}
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return fi, nil
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}
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