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util.go
135 lines (121 loc) · 2.83 KB
/
util.go
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/*
* Tencent is pleased to support the open source community by making TKEStack available.
*
* Copyright (C) 2012-2019 Tencent. All Rights Reserved.
*
* 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://opensource.org/licenses/Apache-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 OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*/
package volume
import (
"bufio"
"bytes"
"debug/elf"
"encoding/binary"
"io"
"os"
"os/exec"
"path"
"path/filepath"
"regexp"
"strings"
)
func which(bins ...string) ([]string, error) {
paths := make([]string, 0, len(bins))
out, _ := exec.Command("which", bins...).Output()
r := bufio.NewReader(bytes.NewBuffer(out))
for {
p, err := r.ReadString('\n')
if err == io.EOF {
break
}
if err != nil {
return nil, err
}
if p = strings.TrimSpace(p); !path.IsAbs(p) {
continue
}
realPath, err := filepath.EvalSymlinks(p)
if err != nil {
return nil, err
}
paths = append(paths, realPath)
}
return paths, nil
}
func clone(src, dst string) error {
// Prefer hard link, fallback to copy
err := os.Link(src, dst)
if err != nil {
err = fallbackCopy(src, dst)
}
return err
}
func fallbackCopy(src, dst string) error {
s, err := os.Open(src)
if err != nil {
return err
}
defer s.Close()
fi, err := s.Stat()
if err != nil {
return err
}
d, err := os.Create(dst)
if err != nil {
return err
}
if _, err := io.Copy(d, s); err != nil {
d.Close()
return err
}
if err := d.Chmod(fi.Mode()); err != nil {
d.Close()
return err
}
return d.Close()
}
func blacklisted(file string, obj *elf.File) (bool, error) {
lib := regexp.MustCompile(`^.*/lib([\w-]+)\.so[\d.]*$`)
glcore := regexp.MustCompile(`libnvidia-e?glcore\.so`)
gldispatch := regexp.MustCompile(`libGLdispatch\.so`)
if m := lib.FindStringSubmatch(file); m != nil {
switch m[1] {
// Blacklist EGL/OpenGL libraries issued by other vendors
case "EGL":
fallthrough
case "GLESv1_CM":
fallthrough
case "GLESv2":
fallthrough
case "GL":
deps, err := obj.DynString(elf.DT_NEEDED)
if err != nil {
return false, err
}
for _, d := range deps {
if glcore.MatchString(d) || gldispatch.MatchString(d) {
return false, nil
}
}
return true, nil
// Blacklist TLS libraries using the old ABI (!= 2.3.99)
case "nvidia-tls":
const abi = 0x6300000003
s, err := obj.Section(".note.ABI-tag").Data()
if err != nil {
return false, err
}
return binary.LittleEndian.Uint64(s[24:]) != abi, nil
}
}
return false, nil
}