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// Copyright 2018 The containerd Authors.
// Copyright 2018 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package runsc
import (
"bytes"
"strings"
"sync"
)
var bytesBufferPool = sync.Pool{
New: func() any {
return bytes.NewBuffer(nil)
},
}
func getBuf() *bytes.Buffer {
return bytesBufferPool.Get().(*bytes.Buffer)
}
func putBuf(b *bytes.Buffer) {
b.Reset()
bytesBufferPool.Put(b)
}
// pathLikeFlags are runsc flags which refer to paths to files.
var pathLikeFlags = []string{
"log",
"panic-log",
"debug-log",
"coverage-report",
"profile-block",
"profile-cpu",
"profile-heap",
"profile-mutex",
"trace",
}
// replaceID replaces %ID% in `path` with the given sandbox ID.
func replaceID(id string, path string) string {
return strings.Replace(path, "%ID%", id, -1)
}
// EmittedPaths returns a list of file paths that the sandbox may need to
// create using the given configuration. Useful to create parent directories.
func EmittedPaths(id string, config map[string]string) []string {
var paths []string
for _, cfgFlag := range pathLikeFlags {
if path, ok := config[cfgFlag]; ok {
paths = append(paths, replaceID(id, path))
}
}
return paths
}
// FormatRunscPaths fills in %ID% in path-like flags.
func FormatRunscPaths(id string, config map[string]string) {
for _, cfgFlag := range pathLikeFlags {
if path, ok := config[cfgFlag]; ok {
config[cfgFlag] = replaceID(id, path)
}
}
}
// FormatShimLogPath creates the file path to the log file. It replaces %ID%
// in the path with the provided "id". It also uses a default log name if the
// path ends with '/'.
func FormatShimLogPath(path string, id string) string {
if strings.HasSuffix(path, "/") {
// Default format: <path>/runsc-shim-<ID>.log
path += "runsc-shim-%ID%.log"
}
return replaceID(id, path)
}
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