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refactor: move from io/ioutil to io and os packages

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The io/ioutil package has been deprecated as of Go 1.16 [1]. This commit
replaces the existing io/ioutil functions with their new definitions in
io and os packages.

Reference: https://golang.org/doc/go1.16#ioutil
Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>
This commit is contained in:
Eng Zer Jun 2022-09-15 20:06:59 +08:00 committed by Brad Fitzpatrick
parent 027111fb5a
commit f0347e841f
60 changed files with 112 additions and 156 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
atomicfile/atomicfile.go
View File

@ -9,7 +9,6 @@
package atomicfile // import "tailscale.com/atomicfile"
import (
"io/ioutil"
"os"
"path/filepath"
"runtime"
@ -18,7 +17,7 @@
// WriteFile writes data to filename+some suffix, then renames it
// into filename. The perm argument is ignored on Windows.
func WriteFile(filename string, data []byte, perm os.FileMode) (err error) {
f, err := ioutil.TempFile(filepath.Dir(filename), filepath.Base(filename)+".tmp")
f, err := os.CreateTemp(filepath.Dir(filename), filepath.Base(filename)+".tmp")
if err != nil {
return err
}

7
client/tailscale/localclient.go
View File

@ -15,7 +15,6 @@
"errors"
"fmt"
"io"
"io/ioutil"
"net"
"net/http"
"net/http/httptrace"
@ -137,7 +136,7 @@ func (lc *LocalClient) doLocalRequestNiceError(req *http.Request) (*http.Respons
onVersionMismatch(ipn.IPCVersion(), server)
}
if res.StatusCode == 403 {
all, _ := ioutil.ReadAll(res.Body)
all, _ := io.ReadAll(res.Body)
return nil, &AccessDeniedError{errors.New(errorMessageFromBody(all))}
}
return res, nil
@ -207,7 +206,7 @@ func (lc *LocalClient) send(ctx context.Context, method, path string, wantStatus
return nil, err
}
defer res.Body.Close()
slurp, err := ioutil.ReadAll(res.Body)
slurp, err := io.ReadAll(res.Body)
if err != nil {
return nil, err
}
@ -365,7 +364,7 @@ func (lc *LocalClient) GetWaitingFile(ctx context.Context, baseName string) (rc
return nil, 0, fmt.Errorf("unexpected chunking")
}
if res.StatusCode != 200 {
body, _ := ioutil.ReadAll(res.Body)
body, _ := io.ReadAll(res.Body)
res.Body.Close()
return nil, 0, fmt.Errorf("HTTP %s: %s", res.Status, body)
}

3
client/tailscale/tailscale.go
View File

@ -17,7 +17,6 @@
"errors"
"fmt"
"io"
"io/ioutil"
"net/http"
)
@ -131,7 +130,7 @@ func (c *Client) sendRequest(req *http.Request) ([]byte, *http.Response, error)
// Read response. Limit the response to 10MB.
body := io.LimitReader(resp.Body, maxReadSize+1)
b, err := ioutil.ReadAll(body)
b, err := io.ReadAll(body)
if len(b) > maxReadSize {
err = errors.New("API response too large")
}

5
cmd/derper/derper.go
View File

@ -14,7 +14,6 @@
"flag"
"fmt"
"io"
"io/ioutil"
"log"
"math"
"net"
@ -99,7 +98,7 @@ func loadConfig() config {
}
log.Printf("no config path specified; using %s", *configPath)
}
b, err := ioutil.ReadFile(*configPath)
b, err := os.ReadFile(*configPath)
switch {
case errors.Is(err, os.ErrNotExist):
return writeNewConfig()
@ -155,7 +154,7 @@ func main() {
s.SetVerifyClient(*verifyClients)
if *meshPSKFile != "" {
b, err := ioutil.ReadFile(*meshPSKFile)
b, err := os.ReadFile(*meshPSKFile)
if err != nil {
log.Fatal(err)
}

3
cmd/hello/hello.go
View File

@ -13,7 +13,6 @@
"errors"
"flag"
"html/template"
"io/ioutil"
"log"
"net/http"
"os"
@ -106,7 +105,7 @@ func devMode() bool { return *httpsAddr == "" && *httpAddr != "" }
func getTmpl() (*template.Template, error) {
if devMode() {
tmplData, err := ioutil.ReadFile("hello.tmpl.html")
tmplData, err := os.ReadFile("hello.tmpl.html")
if os.IsNotExist(err) {
log.Printf("using baked-in template in dev mode; can't find hello.tmpl.html in current directory")
return tmpl, nil

3
cmd/tailscale/cli/netcheck.go
View File

@ -10,7 +10,6 @@
"flag"
"fmt"
"io"
"io/ioutil"
"log"
"net/http"
"sort"
@ -202,7 +201,7 @@ func prodDERPMap(ctx context.Context, httpc *http.Client) (*tailcfg.DERPMap, err
return nil, fmt.Errorf("fetch prodDERPMap failed: %w", err)
}
defer res.Body.Close()
b, err := ioutil.ReadAll(io.LimitReader(res.Body, 1<<20))
b, err := io.ReadAll(io.LimitReader(res.Body, 1<<20))
if err != nil {
return nil, fmt.Errorf("fetch prodDERPMap failed: %w", err)
}

3
cmd/tailscale/cli/web.go
View File

@ -15,7 +15,6 @@
"fmt"
"html/template"
"io"
"io/ioutil"
"log"
"net"
"net/http"
@ -254,7 +253,7 @@ func qnapAuthnFinish(user, url string) (string, *qnapAuthResponse, error) {
return "", nil, err
}
defer resp.Body.Close()
out, err := ioutil.ReadAll(resp.Body)
out, err := io.ReadAll(resp.Body)
if err != nil {
return "", nil, err
}

3
cmd/tailscaled/debug.go
View File

@ -15,7 +15,6 @@
"flag"
"fmt"
"io"
"io/ioutil"
"log"
"net"
"net/http"
@ -173,7 +172,7 @@ func checkDerp(ctx context.Context, derpRegion string) error {
return fmt.Errorf("fetch derp map failed: %w", err)
}
defer res.Body.Close()
b, err := ioutil.ReadAll(io.LimitReader(res.Body, 1<<20))
b, err := io.ReadAll(io.LimitReader(res.Body, 1<<20))
if err != nil {
return fmt.Errorf("fetch derp map failed: %w", err)
}

3
cmd/tailscaled/install_darwin.go
View File

@ -11,7 +11,6 @@
"errors"
"fmt"
"io"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
@ -142,7 +141,7 @@ func installSystemDaemonDarwin(args []string) (err error) {
return err
}
if err := ioutil.WriteFile(sysPlist, []byte(darwinLaunchdPlist), 0700); err != nil {
if err := os.WriteFile(sysPlist, []byte(darwinLaunchdPlist), 0700); err != nil {
return err
}

3
cmd/tsconnect/build.go
View File

@ -7,7 +7,6 @@
import (
"encoding/json"
"fmt"
"io/ioutil"
"log"
"os"
"path"
@ -47,7 +46,7 @@ func runBuild() {
if err != nil {
log.Fatalf("Cannot fix esbuild metadata paths: %v", err)
}
if err := ioutil.WriteFile(path.Join(*distDir, "/esbuild-metadata.json"), metadataBytes, 0666); err != nil {
if err := os.WriteFile(path.Join(*distDir, "/esbuild-metadata.json"), metadataBytes, 0666); err != nil {
log.Fatalf("Cannot write metadata: %v", err)
}

3
cmd/tsconnect/common.go
View File

@ -6,7 +6,6 @@
import (
"fmt"
"io/ioutil"
"log"
"net"
"os"
@ -183,7 +182,7 @@ func setupEsbuildWasm(build esbuild.PluginBuild, dev bool) {
func buildWasm(dev bool) ([]byte, error) {
start := time.Now()
outputFile, err := ioutil.TempFile("", "main.*.wasm")
outputFile, err := os.CreateTemp("", "main.*.wasm")
if err != nil {
return nil, fmt.Errorf("Cannot create main.wasm output file: %w", err)
}

3
cmd/tsconnect/serve.go
View File

@ -11,7 +11,6 @@
"fmt"
"io"
"io/fs"
"io/ioutil"
"log"
"net/http"
"os"
@ -75,7 +74,7 @@ func generateServeIndex(distFS fs.FS) ([]byte, error) {
return nil, fmt.Errorf("Could not open esbuild-metadata.json: %w", err)
}
defer esbuildMetadataFile.Close()
esbuildMetadataBytes, err := ioutil.ReadAll(esbuildMetadataFile)
esbuildMetadataBytes, err := io.ReadAll(esbuildMetadataFile)
if err != nil {
return nil, fmt.Errorf("Could not read esbuild-metadata.json: %w", err)
}

15
control/controlclient/direct.go
View File

@ -14,7 +14,6 @@
"flag"
"fmt"
"io"
"io/ioutil"
"log"
"net/http"
"net/http/httptest"
@ -523,7 +522,7 @@ func (c *Direct) doLogin(ctx context.Context, opt loginOpt) (mustRegen bool, new
return regen, opt.URL, fmt.Errorf("register request: %w", err)
}
if res.StatusCode != 200 {
msg, _ := ioutil.ReadAll(res.Body)
msg, _ := io.ReadAll(res.Body)
res.Body.Close()
return regen, opt.URL, fmt.Errorf("register request: http %d: %.200s",
res.StatusCode, strings.TrimSpace(string(msg)))
@ -804,7 +803,7 @@ func (c *Direct) sendMapRequest(ctx context.Context, maxPolls int, readOnly bool
}
vlogf("netmap: Do = %v after %v", res.StatusCode, time.Since(t0).Round(time.Millisecond))
if res.StatusCode != 200 {
msg, _ := ioutil.ReadAll(res.Body)
msg, _ := io.ReadAll(res.Body)
res.Body.Close()
return fmt.Errorf("initial fetch failed %d: %.200s",
res.StatusCode, strings.TrimSpace(string(msg)))
@ -814,7 +813,7 @@ func (c *Direct) sendMapRequest(ctx context.Context, maxPolls int, readOnly bool
health.NoteMapRequestHeard(request)
if cb == nil {
io.Copy(ioutil.Discard, res.Body)
io.Copy(io.Discard, res.Body)
return nil
}
@ -998,7 +997,7 @@ func (c *Direct) sendMapRequest(ctx context.Context, maxPolls int, readOnly bool
// it uses the serverKey and mkey to decode the message from the NaCl-crypto-box.
func decode(res *http.Response, v any, serverKey, serverNoiseKey key.MachinePublic, mkey key.MachinePrivate) error {
defer res.Body.Close()
msg, err := ioutil.ReadAll(io.LimitReader(res.Body, 1<<20))
msg, err := io.ReadAll(io.LimitReader(res.Body, 1<<20))
if err != nil {
return err
}
@ -1110,7 +1109,7 @@ func loadServerPubKeys(ctx context.Context, httpc *http.Client, serverURL string
return nil, fmt.Errorf("fetch control key: %v", err)
}
defer res.Body.Close()
b, err := ioutil.ReadAll(io.LimitReader(res.Body, 64<<10))
b, err := io.ReadAll(io.LimitReader(res.Body, 64<<10))
if err != nil {
return nil, fmt.Errorf("fetch control key response: %v", err)
}
@ -1398,7 +1397,7 @@ func (c *Direct) setDNSNoise(ctx context.Context, req *tailcfg.SetDNSRequest) er
}
defer res.Body.Close()
if res.StatusCode != 200 {
msg, _ := ioutil.ReadAll(res.Body)
msg, _ := io.ReadAll(res.Body)
return fmt.Errorf("set-dns response: %v, %.200s", res.Status, strings.TrimSpace(string(msg)))
}
var setDNSRes tailcfg.SetDNSResponse
@ -1464,7 +1463,7 @@ func (c *Direct) SetDNS(ctx context.Context, req *tailcfg.SetDNSRequest) (err er
}
defer res.Body.Close()
if res.StatusCode != 200 {
msg, _ := ioutil.ReadAll(res.Body)
msg, _ := io.ReadAll(res.Body)
return fmt.Errorf("set-dns response: %v, %.200s", res.Status, strings.TrimSpace(string(msg)))
}
var setDNSRes tailcfg.SetDNSResponse

3
derp/derp.go
View File

@ -19,7 +19,6 @@
"errors"
"fmt"
"io"
"io/ioutil"
"time"
)
@ -195,7 +194,7 @@ func readFrame(br *bufio.Reader, maxSize uint32, b []byte) (t frameType, frameLe
}
remain := frameLen - uint32(n)
if remain > 0 {
if _, err := io.CopyN(ioutil.Discard, br, int64(remain)); err != nil {
if _, err := io.CopyN(io.Discard, br, int64(remain)); err != nil {
return 0, 0, err
}
err = io.ErrShortBuffer

9
derp/derp_server.go
View File

@ -18,7 +18,6 @@
"expvar"
"fmt"
"io"
"io/ioutil"
"log"
"math"
"math/big"
@ -758,7 +757,7 @@ func (c *sclient) run(ctx context.Context) error {
}
func (c *sclient) handleUnknownFrame(ft frameType, fl uint32) error {
_, err := io.CopyN(ioutil.Discard, c.br, int64(fl))
_, err := io.CopyN(io.Discard, c.br, int64(fl))
return err
}
@ -801,7 +800,7 @@ func (c *sclient) handleFramePing(ft frameType, fl uint32) error {
return err
}
if extra := int64(fl) - int64(len(m)); extra > 0 {
_, err = io.CopyN(ioutil.Discard, c.br, extra)
_, err = io.CopyN(io.Discard, c.br, extra)
}
select {
case c.sendPongCh <- [8]byte(m):
@ -1828,7 +1827,7 @@ func (s *Server) ServeDebugTraffic(w http.ResponseWriter, r *http.Request) {
var bufioWriterPool = &sync.Pool{
New: func() any {
return bufio.NewWriterSize(ioutil.Discard, 2<<10)
return bufio.NewWriterSize(io.Discard, 2<<10)
},
}
@ -1861,7 +1860,7 @@ func (w *lazyBufioWriter) Flush() error {
}
err := w.lbw.Flush()
w.lbw.Reset(ioutil.Discard)
w.lbw.Reset(io.Discard)
bufioWriterPool.Put(w.lbw)
w.lbw = nil

8
derp/derp_test.go
View File

@ -15,9 +15,9 @@
"expvar"
"fmt"
"io"
"io/ioutil"
"log"
"net"
"os"
"reflect"
"sync"
"testing"
@ -1240,7 +1240,7 @@ func benchmarkSendRecvSize(b *testing.B, packetSize int) {
}
func BenchmarkWriteUint32(b *testing.B) {
w := bufio.NewWriter(ioutil.Discard)
w := bufio.NewWriter(io.Discard)
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
@ -1279,9 +1279,9 @@ func waitConnect(t testing.TB, c *Client) {
}
func TestParseSSOutput(t *testing.T) {
contents, err := ioutil.ReadFile("testdata/example_ss.txt")
contents, err := os.ReadFile("testdata/example_ss.txt")
if err != nil {
t.Errorf("ioutil.Readfile(example_ss.txt) failed: %v", err)
t.Errorf("os.ReadFile(example_ss.txt) failed: %v", err)
}
seen := parseSSOutput(string(contents))
if len(seen) == 0 {

3
derp/derphttp/derphttp_client.go
View File

@ -19,7 +19,6 @@
"errors"
"fmt"
"io"
"io/ioutil"
"net"
"net/http"
"net/netip"
@ -432,7 +431,7 @@ func (c *Client) connect(ctx context.Context, caller string) (client *derp.Clien
return nil, 0, err
}
if resp.StatusCode != http.StatusSwitchingProtocols {
b, _ := ioutil.ReadAll(resp.Body)
b, _ := io.ReadAll(resp.Body)
resp.Body.Close()
return nil, 0, fmt.Errorf("GET failed: %v: %s", err, b)
}

9
hostinfo/hostinfo_linux.go
View File

@ -9,7 +9,6 @@
import (
"bytes"
"io/ioutil"
"os"
"strings"
@ -99,11 +98,11 @@ func linuxVersionMeta() (meta versionMeta) {
case distro.OpenWrt:
propFile = "/etc/openwrt_release"
case distro.WDMyCloud:
slurp, _ := ioutil.ReadFile("/etc/version")
slurp, _ := os.ReadFile("/etc/version")
meta.DistroVersion = string(bytes.TrimSpace(slurp))
return
case distro.QNAP:
slurp, _ := ioutil.ReadFile("/etc/version_info")
slurp, _ := os.ReadFile("/etc/version_info")
meta.DistroVersion = getQnapQtsVersion(string(slurp))
return
}
@ -133,7 +132,7 @@ func linuxVersionMeta() (meta versionMeta) {
case "debian":
// Debian's VERSION_ID is just like "11". But /etc/debian_version has "11.5" normally.
// Or "bookworm/sid" on sid/testing.
slurp, _ := ioutil.ReadFile("/etc/debian_version")
slurp, _ := os.ReadFile("/etc/debian_version")
if v := string(bytes.TrimSpace(slurp)); v != "" {
if '0' <= v[0] && v[0] <= '9' {
meta.DistroVersion = v
@ -143,7 +142,7 @@ func linuxVersionMeta() (meta versionMeta) {
}
case "", "centos": // CentOS 6 has no /etc/os-release, so its id is ""
if meta.DistroVersion == "" {
if cr, _ := ioutil.ReadFile("/etc/centos-release"); len(cr) > 0 { // "CentOS release 6.10 (Final)
if cr, _ := os.ReadFile("/etc/centos-release"); len(cr) > 0 { // "CentOS release 6.10 (Final)
meta.DistroVersion = string(bytes.TrimSpace(cr))
}
}

5
ipn/ipnlocal/peerapi_test.go
View File

@ -9,7 +9,6 @@
"fmt"
"io"
"io/fs"
"io/ioutil"
"math/rand"
"net/http"
"net/http/httptest"
@ -87,7 +86,7 @@ func fileHasContents(name string, want string) check {
return
}
path := filepath.Join(root, name)
got, err := ioutil.ReadFile(path)
got, err := os.ReadFile(path)
if err != nil {
t.Errorf("fileHasContents: %v", err)
return
@ -517,7 +516,7 @@ func TestDeletedMarkers(t *testing.T) {
}
wantEmptyTempDir := func() {
t.Helper()
if fis, err := ioutil.ReadDir(dir); err != nil {
if fis, err := os.ReadDir(dir); err != nil {
t.Fatal(err)
} else if len(fis) > 0 && runtime.GOOS != "windows" {
for _, fi := range fis {

5
ipn/ipnlocal/ssh.go
View File

@ -18,7 +18,6 @@
"encoding/pem"
"errors"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strings"
@ -80,7 +79,7 @@ func (b *LocalBackend) hostKeyFileOrCreate(keyDir, typ string) ([]byte, error) {
defer keyGenMu.Unlock()
path := filepath.Join(keyDir, "ssh_host_"+typ+"_key")
v, err := ioutil.ReadFile(path)
v, err := os.ReadFile(path)
if err == nil {
return v, nil
}
@ -121,7 +120,7 @@ func (b *LocalBackend) hostKeyFileOrCreate(keyDir, typ string) ([]byte, error) {
func (b *LocalBackend) getSystemSSH_HostKeys() (ret map[string]ssh.Signer) {
for _, typ := range keyTypes {
filename := "/etc/ssh/ssh_host_" + typ + "_key"
hostKey, err := ioutil.ReadFile(filename)
hostKey, err := os.ReadFile(filename)
if err != nil || len(bytes.TrimSpace(hostKey)) == 0 {
continue
}

5
ipn/ipnserver/server.go
View File

@ -12,7 +12,6 @@
"errors"
"fmt"
"io"
"io/ioutil"
"log"
"net"
"net/http"
@ -215,7 +214,7 @@ func (s *Server) blockWhileInUse(conn io.Reader, ci connIdentity) {
s.logf("blocking client while server in use; connIdentity=%v", ci)
connDone := make(chan struct{})
go func() {
io.Copy(ioutil.Discard, conn)
io.Copy(io.Discard, conn)
close(connDone)
}()
ch := make(chan struct{}, 1)
@ -1175,7 +1174,7 @@ func findTrueNASTaildropDir(name string) (dir string, err error) {
}
// but if running on the host, it may be something like /mnt/Primary/Taildrop
fis, err := ioutil.ReadDir("/mnt")
fis, err := os.ReadDir("/mnt")
if err != nil {
return "", fmt.Errorf("error reading /mnt: %w", err)
}

9
ipn/localapi/cert.go
View File

@ -23,7 +23,6 @@
"errors"
"fmt"
"io"
"io/ioutil"
"log"
"net"
"net/http"
@ -293,7 +292,7 @@ func (h *Handler) getCertPEM(ctx context.Context, logf logger.Logf, traceACME fu
if err := encodeECDSAKey(&privPEM, certPrivKey); err != nil {
return nil, err
}
if err := ioutil.WriteFile(keyFile(dir, domain), privPEM.Bytes(), 0600); err != nil {
if err := os.WriteFile(keyFile(dir, domain), privPEM.Bytes(), 0600); err != nil {
return nil, err
}
@ -316,7 +315,7 @@ func (h *Handler) getCertPEM(ctx context.Context, logf logger.Logf, traceACME fu
return nil, err
}
}
if err := ioutil.WriteFile(certFile(dir, domain), certPEM.Bytes(), 0644); err != nil {
if err := os.WriteFile(certFile(dir, domain), certPEM.Bytes(), 0644); err != nil {
return nil, err
}
@ -372,7 +371,7 @@ func parsePrivateKey(der []byte) (crypto.Signer, error) {
func acmeKey(dir string) (crypto.Signer, error) {
pemName := filepath.Join(dir, "acme-account.key.pem")
if v, err := ioutil.ReadFile(pemName); err == nil {
if v, err := os.ReadFile(pemName); err == nil {
priv, _ := pem.Decode(v)
if priv == nil || !strings.Contains(priv.Type, "PRIVATE") {
return nil, errors.New("acme/autocert: invalid account key found in cache")
@ -388,7 +387,7 @@ func acmeKey(dir string) (crypto.Signer, error) {
if err := encodeECDSAKey(&pemBuf, privKey); err != nil {
return nil, err
}
if err := ioutil.WriteFile(pemName, pemBuf.Bytes(), 0600); err != nil {
if err := os.WriteFile(pemName, pemBuf.Bytes(), 0600); err != nil {
return nil, err
}
return privKey, nil

3
ipn/prefs.go
View File

@ -9,7 +9,6 @@
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"log"
"net/netip"
"os"
@ -618,7 +617,7 @@ func PrefsFromBytes(b []byte) (*Prefs, error) {
// LoadPrefs loads a legacy relaynode config file into Prefs
// with sensible migration defaults set.
func LoadPrefs(filename string) (*Prefs, error) {
data, err := ioutil.ReadFile(filename)
data, err := os.ReadFile(filename)
if err != nil {
return nil, fmt.Errorf("LoadPrefs open: %w", err) // err includes path
}

3
ipn/prefs_test.go
View File

@ -8,7 +8,6 @@
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"net/netip"
"os"
"reflect"
@ -474,7 +473,7 @@ func TestLoadPrefsNotExist(t *testing.T) {
// TestLoadPrefsFileWithZeroInIt verifies that LoadPrefs hanldes corrupted input files.
// See issue #954 for details.
func TestLoadPrefsFileWithZeroInIt(t *testing.T) {
f, err := ioutil.TempFile("", "TestLoadPrefsFileWithZeroInIt")
f, err := os.CreateTemp("", "TestLoadPrefsFileWithZeroInIt")
if err != nil {
t.Fatal(err)
}

3
ipn/store/stores.go
View File

@ -9,7 +9,6 @@
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"runtime"
@ -128,7 +127,7 @@ func NewFileStore(logf logger.Logf, path string) (ipn.StateStore, error) {
return nil, fmt.Errorf("creating state directory: %w", err)
}
bs, err := ioutil.ReadFile(path)
bs, err := os.ReadFile(path)
// Treat an empty file as a missing file.
// (https://github.com/tailscale/tailscale/issues/895#issuecomment-723255589)

11
log/filelogger/log.go
View File

@ -9,7 +9,6 @@
import (
"bytes"
"fmt"
"io/ioutil"
"log"
"os"
"path/filepath"
@ -186,12 +185,18 @@ func (w *logFileWriter) startNewFileLocked() {
//
// w.mu must be held.
func (w *logFileWriter) cleanLocked() {
fis, _ := ioutil.ReadDir(w.dir)
entries, _ := os.ReadDir(w.dir)
prefix := w.fileBasePrefix + "-"
fileSize := map[string]int64{}
var files []string
var sumSize int64
for _, fi := range fis {
for _, entry := range entries {
fi, err := entry.Info()
if err != nil {
w.wrappedLogf("error getting log file info: %v", err)
continue
}
baseName := filepath.Base(fi.Name())
if !strings.HasPrefix(baseName, prefix) {
continue

5
logpolicy/logpolicy.go
View File

@ -16,7 +16,6 @@
"errors"
"fmt"
"io"
"io/ioutil"
"log"
"net"
"net/http"
@ -248,7 +247,7 @@ func logsDir(logf logger.Logf) string {
// No idea where to put stuff. Try to create a temp dir. It'll
// mean we might lose some logs and rotate through log IDs, but
// it's something.
tmp, err := ioutil.TempDir("", "tailscaled-log-*")
tmp, err := os.MkdirTemp("", "tailscaled-log-*")
if err != nil {
panic("no safe place found to store log state")
}
@ -259,7 +258,7 @@ func logsDir(logf logger.Logf) string {
// runningUnderSystemd reports whether we're running under systemd.
func runningUnderSystemd() bool {
if runtime.GOOS == "linux" && os.Getppid() == 1 {
slurp, _ := ioutil.ReadFile("/proc/1/stat")
slurp, _ := os.ReadFile("/proc/1/stat")
return bytes.HasPrefix(slurp, []byte("1 (systemd) "))
}
return false

4
logtail/example/logadopt/logadopt.go
View File

@ -6,7 +6,7 @@
import (
"flag"
"io/ioutil"
"io"
"log"
"net/http"
"net/url"
@ -39,7 +39,7 @@ func main() {
if err != nil {
log.Fatal(err)
}
b, err := ioutil.ReadAll(resp.Body)
b, err := io.ReadAll(resp.Body)
resp.Body.Close()
if err != nil {
log.Fatalf("logadopt: response read failed %d: %v", resp.StatusCode, err)

4
logtail/example/logreprocess/logreprocess.go
View File

@ -9,7 +9,7 @@
"bufio"
"encoding/json"
"flag"
"io/ioutil"
"io"
"log"
"net/http"
"os"
@ -50,7 +50,7 @@ func main() {
defer resp.Body.Close()
if resp.StatusCode != 200 {
b, err := ioutil.ReadAll(resp.Body)
b, err := io.ReadAll(resp.Body)
if err != nil {
log.Fatalf("logreprocess: read error %d: %v", resp.StatusCode, err)
}

4
logtail/filch/filch_test.go
View File

@ -6,7 +6,7 @@
import (
"fmt"
"io/ioutil"
"io"
"os"
"runtime"
"strings"
@ -195,7 +195,7 @@ func TestFilchStderr(t *testing.T) {
f.close(t)
pipeW.Close()
b, err := ioutil.ReadAll(pipeR)
b, err := io.ReadAll(pipeR)
if err != nil {
t.Fatal(err)
}

5
logtail/logtail.go
View File

@ -13,7 +13,6 @@
"encoding/json"
"fmt"
"io"
"io/ioutil"
"net/http"
"os"
"strconv"
@ -430,7 +429,7 @@ func (l *Logger) upload(ctx context.Context, body []byte, origlen int) (uploaded
if resp.StatusCode != 200 {
uploaded = resp.StatusCode == 400 // the server saved the logs anyway
b, _ := ioutil.ReadAll(io.LimitReader(resp.Body, 1<<20))
b, _ := io.ReadAll(io.LimitReader(resp.Body, 1<<20))
return uploaded, fmt.Errorf("log upload of %d bytes %s failed %d: %q", len(body), compressedNote, resp.StatusCode, b)
}
@ -654,7 +653,7 @@ func (l *Logger) Write(buf []byte) (int, error) {
return 0, nil
}
level, buf := parseAndRemoveLogLevel(buf)
if l.stderr != nil && l.stderr != ioutil.Discard && int64(level) <= atomic.LoadInt64(&l.stderrLevel) {
if l.stderr != nil && l.stderr != io.Discard && int64(level) <= atomic.LoadInt64(&l.stderrLevel) {
if buf[len(buf)-1] == '\n' {
l.stderr.Write(buf)
} else {

3
logtail/logtail_test.go
View File

@ -9,7 +9,6 @@
"context"
"encoding/json"
"io"
"io/ioutil"
"net/http"
"net/http/httptest"
"strings"
@ -52,7 +51,7 @@ func NewLogtailTestHarness(t *testing.T) (*LogtailTestServer, *Logger) {
ts.srv = httptest.NewServer(http.HandlerFunc(
func(w http.ResponseWriter, r *http.Request) {
body, err := ioutil.ReadAll(r.Body)
body, err := io.ReadAll(r.Body)
if err != nil {
t.Error("failed to read HTTP request")
}

3
net/dns/debian_resolvconf.go
View File

@ -12,7 +12,6 @@
"bytes"
_ "embed"
"fmt"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
@ -158,7 +157,7 @@ func (m *resolvconfManager) GetBaseConfig() (OSConfig, error) {
if sc.Text() == resolvconfConfigName {
continue
}
bs, err := ioutil.ReadFile(filepath.Join(m.interfacesDir, sc.Text()))
bs, err := os.ReadFile(filepath.Join(m.interfacesDir, sc.Text()))
if err != nil {
if os.IsNotExist(err) {
// Probably raced with a deletion, that's okay.

5
net/dns/direct.go
View File

@ -12,7 +12,6 @@
"fmt"
"io"
"io/fs"
"io/ioutil"
"net/netip"
"os"
"os/exec"
@ -452,7 +451,7 @@ func (fs directFS) Rename(oldName, newName string) error {
func (fs directFS) Remove(name string) error { return os.Remove(fs.path(name)) }
func (fs directFS) ReadFile(name string) ([]byte, error) {
return ioutil.ReadFile(fs.path(name))
return os.ReadFile(fs.path(name))
}
func (fs directFS) Truncate(name string) error {
@ -460,7 +459,7 @@ func (fs directFS) Truncate(name string) error {
}
func (fs directFS) WriteFile(name string, contents []byte, perm os.FileMode) error {
return ioutil.WriteFile(fs.path(name), contents, perm)
return os.WriteFile(fs.path(name), contents, perm)
}
// runningAsGUIDesktopUser reports whether it seems that this code is

3
net/dns/manager_freebsd.go
View File

@ -6,14 +6,13 @@
import (
"fmt"
"io/ioutil"
"os"
"tailscale.com/types/logger"
)
func NewOSConfigurator(logf logger.Logf, _ string) (OSConfigurator, error) {
bs, err := ioutil.ReadFile("/etc/resolv.conf")
bs, err := os.ReadFile("/etc/resolv.conf")
if os.IsNotExist(err) {
return newDirectManager(logf), nil
}

3
net/dns/resolver/forwarder.go
View File

@ -11,7 +11,6 @@
"errors"
"fmt"
"io"
"io/ioutil"
"math/rand"
"net"
"net/http"
@ -474,7 +473,7 @@ func (f *forwarder) sendDoH(ctx context.Context, urlBase string, c *http.Client,
metricDNSFwdDoHErrorCT.Add(1)
return nil, fmt.Errorf("unexpected response Content-Type %q", ct)
}
res, err := ioutil.ReadAll(hres.Body)
res, err := io.ReadAll(hres.Body)
if err != nil {
metricDNSFwdDoHErrorBody.Add(1)
}

3
net/dnsfallback/update-dns-fallbacks.go
View File

@ -10,7 +10,6 @@
import (
"encoding/json"
"fmt"
"io/ioutil"
"log"
"net/http"
"os"
@ -42,7 +41,7 @@ func main() {
if err != nil {
log.Fatal(err)
}
if err := ioutil.WriteFile("dns-fallback-servers.json", out, 0644); err != nil {
if err := os.WriteFile("dns-fallback-servers.json", out, 0644); err != nil {
log.Fatal(err)
}
}

5
net/interfaces/interfaces_linux_test.go
View File

@ -8,7 +8,6 @@
"errors"
"fmt"
"io/fs"
"io/ioutil"
"os"
"path/filepath"
"testing"
@ -23,7 +22,7 @@ func TestGoogleCloudRunDefaultRouteInterface(t *testing.T) {
buf := []byte("Iface\tDestination\tGateway\tFlags\tRefCnt\tUse\tMetric\tMask\tMTU\tWindow\tIRTT\n" +
"eth0\t8008FEA9\t00000000\t0001\t0\t0\t0\t01FFFFFF\t0\t0\t0\n" +
"eth1\t00000000\t00000000\t0001\t0\t0\t0\t00000000\t0\t0\t0\n")
err := ioutil.WriteFile(procNetRoutePath, buf, 0644)
err := os.WriteFile(procNetRoutePath, buf, 0644)
if err != nil {
t.Fatal(err)
}
@ -87,7 +86,7 @@ func TestAwsAppRunnerDefaultRouteInterface(t *testing.T) {
"ecs-eth0\t02AAFEA9\t01ACFEA9\t0007\t0\t0\t0\tFFFFFFFF\t0\t0\t0\n" +
"ecs-eth0\t00ACFEA9\t00000000\t0001\t0\t0\t0\t00FFFFFF\t0\t0\t0\n" +
"eth0\t00AFFEA9\t00000000\t0001\t0\t0\t0\t00FFFFFF\t0\t0\t0\n")
err := ioutil.WriteFile(procNetRoutePath, buf, 0644)
err := os.WriteFile(procNetRoutePath, buf, 0644)
if err != nil {
t.Fatal(err)
}

3
net/netcheck/netcheck.go
View File

@ -12,7 +12,6 @@
"errors"
"fmt"
"io"
"io/ioutil"
"log"
"net"
"net/http"
@ -1096,7 +1095,7 @@ func (c *Client) measureHTTPSLatency(ctx context.Context, reg *tailcfg.DERPRegio
return 0, ip, fmt.Errorf("unexpected status code: %d (%s)", resp.StatusCode, resp.Status)
}
_, err = io.Copy(ioutil.Discard, io.LimitReader(resp.Body, 8<<10))
_, err = io.Copy(io.Discard, io.LimitReader(resp.Body, 8<<10))
if err != nil {
return 0, ip, err
}

5
net/tshttpproxy/tshttpproxy_synology_test.go
View File

@ -11,7 +11,6 @@
"errors"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"os"
@ -60,7 +59,7 @@ func TestSynologyProxyFromConfigCached(t *testing.T) {
cache.httpProxy = nil
cache.httpsProxy = nil
if err := ioutil.WriteFile(synologyProxyConfigPath, []byte(`
if err := os.WriteFile(synologyProxyConfigPath, []byte(`
proxy_enabled=yes
http_host=10.0.0.55
http_port=80
@ -116,7 +115,7 @@ func TestSynologyProxyFromConfigCached(t *testing.T) {
cache.httpProxy = nil
cache.httpsProxy = nil
if err := ioutil.WriteFile(synologyProxyConfigPath, []byte(`
if err := os.WriteFile(synologyProxyConfigPath, []byte(`
proxy_enabled=yes
http_host=10.0.0.55
http_port=80

7
packages/deb/deb.go
View File

@ -16,7 +16,6 @@
"errors"
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
"strconv"
@ -74,7 +73,7 @@ func Read(r io.Reader) (*Info, error) {
}
// Exhaust the remainder of r, so that the summers see the entire file.
if _, err := io.Copy(ioutil.Discard, r); err != nil {
if _, err := io.Copy(io.Discard, r); err != nil {
return nil, fmt.Errorf("hashing file: %w", err)
}
@ -117,7 +116,7 @@ func findControlTar(r io.Reader) (tarReader io.Reader, err error) {
if size%2 == 1 {
size++
}
if _, err := io.CopyN(ioutil.Discard, r, size); err != nil {
if _, err := io.CopyN(io.Discard, r, size); err != nil {
return nil, fmt.Errorf("seeking past file %q: %w", filename, err)
}
}
@ -150,7 +149,7 @@ func findControlFile(r io.Reader) (control []byte, err error) {
break
}
bs, err := ioutil.ReadAll(tr)
bs, err := io.ReadAll(tr)
if err != nil {
return nil, fmt.Errorf("reading control file: %w", err)
}

3
portlist/portlist_linux.go
View File

@ -8,7 +8,6 @@
"bufio"
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
"runtime"
@ -230,7 +229,7 @@ func addProcesses(pl []Port) ([]Port, error) {
pe := pm[string(targetBuf[:n])] // m[string([]byte)] avoids alloc
if pe != nil {
bs, err := ioutil.ReadFile(fmt.Sprintf("/proc/%s/cmdline", pid))
bs, err := os.ReadFile(fmt.Sprintf("/proc/%s/cmdline", pid))
if err != nil {
// Usually shouldn't happen. One possibility is
// the process has gone away, so let's skip it.

3
safesocket/safesocket_darwin.go
View File

@ -9,7 +9,6 @@
"bytes"
"errors"
"fmt"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
@ -70,7 +69,7 @@ func localTCPPortAndTokenDarwin() (port int, token string, err error) {
// The current binary (this process) is sandboxed. The user is
// running the CLI via /Applications/Tailscale.app/Contents/MacOS/Tailscale
// which sets the TS_MACOS_CLI_SHARED_DIR environment variable.
fis, err := ioutil.ReadDir(dir)
fis, err := os.ReadDir(dir)
if err != nil {
return 0, "", err
}

4
smallzstd/zstd_test.go
View File

@ -5,7 +5,7 @@
package smallzstd
import (
"io/ioutil"
"os"
"testing"
"github.com/klauspost/compress/zstd"
@ -113,7 +113,7 @@ func benchDecoderWithConstruction(b *testing.B, mk func() (*zstd.Decoder, error)
func testdata(b *testing.B) []byte {
b.Helper()
in, err := ioutil.ReadFile("testdata")
in, err := os.ReadFile("testdata")
if err != nil {
b.Fatalf("reading testdata: %v", err)
}

3
ssh/tailssh/tailssh.go
View File

@ -17,7 +17,6 @@
"errors"
"fmt"
"io"
"io/ioutil"
"net"
"net/http"
"net/netip"
@ -1306,7 +1305,7 @@ func (ss *sshSession) startNewRecording() (*recording, error) {
if err := os.MkdirAll(dir, 0700); err != nil {
return nil, err
}
f, err := ioutil.TempFile(dir, fmt.Sprintf("ssh-session-%v-*.cast", now.UnixNano()))
f, err := os.CreateTemp(dir, fmt.Sprintf("ssh-session-%v-*.cast", now.UnixNano()))
if err != nil {
return nil, err
}

4
tempfork/gliderlabs/ssh/agent.go
View File

@ -2,8 +2,8 @@
import (
"io"
"io/ioutil"
"net"
"os"
"path"
"sync"
@ -36,7 +36,7 @@ func AgentRequested(sess Session) bool {
// NewAgentListener sets up a temporary Unix socket that can be communicated
// to the session environment and used for forwarding connections.
func NewAgentListener() (net.Listener, error) {
dir, err := ioutil.TempDir("", agentTempDir)
dir, err := os.MkdirTemp("", agentTempDir)
if err != nil {
return nil, err
}

4
tempfork/gliderlabs/ssh/example_test.go
View File

@ -3,7 +3,7 @@
import (
"errors"
"io"
"io/ioutil"
"os"
"tailscale.com/tempfork/gliderlabs/ssh"
)
@ -29,7 +29,7 @@ func ExampleNoPty() {
func ExamplePublicKeyAuth() {
ssh.ListenAndServe(":2222", nil,
ssh.PublicKeyAuth(func(ctx ssh.Context, key ssh.PublicKey) error {
data, err := ioutil.ReadFile("/path/to/allowed/key.pub")
data, err := os.ReadFile("/path/to/allowed/key.pub")
if err != nil {
return err
}

4
tempfork/gliderlabs/ssh/options.go
View File

@ -1,7 +1,7 @@
package ssh
import (
"io/ioutil"
"os"
gossh "github.com/tailscale/golang-x-crypto/ssh"
)
@ -26,7 +26,7 @@ func PublicKeyAuth(fn PublicKeyHandler) Option {
// from a PEM file at filepath.
func HostKeyFile(filepath string) Option {
return func(srv *Server) error {
pemBytes, err := ioutil.ReadFile(filepath)
pemBytes, err := os.ReadFile(filepath)
if err != nil {
return err
}

3
tempfork/gliderlabs/ssh/tcpip_test.go
View File

@ -5,7 +5,6 @@
import (
"bytes"
"io/ioutil"
"net"
"strconv"
"strings"
@ -61,7 +60,7 @@ func TestLocalPortForwardingWorks(t *testing.T) {
if err != nil {
t.Fatalf("Error connecting to %v: %v", l.Addr().String(), err)
}
result, err := ioutil.ReadAll(conn)
result, err := io.ReadAll(conn)
if err != nil {
t.Fatal(err)
}

4
tempfork/pprof/pprof_test.go
View File

@ -6,7 +6,7 @@
import (
"bytes"
"io/ioutil"
"io"
"net/http"
"net/http/httptest"
"runtime/pprof"
@ -52,7 +52,7 @@ func TestHandlers(t *testing.T) {
t.Errorf("status code: got %d; want %d", got, want)
}
body, err := ioutil.ReadAll(resp.Body)
body, err := io.ReadAll(resp.Body)
if err != nil {
t.Errorf("when reading response body, expected non-nil err; got %v", err)
}

3
tka/tailchonk.go
View File

@ -7,7 +7,6 @@
import (
"bytes"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"sync"
@ -345,7 +344,7 @@ func (c *FS) LastActiveAncestor() (*AUMHash, error) {
c.mu.RLock()
defer c.mu.RUnlock()
hash, err := ioutil.ReadFile(filepath.Join(c.base, "last_active_ancestor"))
hash, err := os.ReadFile(filepath.Join(c.base, "last_active_ancestor"))
if err != nil {
if os.IsNotExist(err) {
return nil, nil // Not exist == none set.

3
tsnet/tsnet.go
View File

@ -11,7 +11,6 @@
"context"
"fmt"
"io"
"io/ioutil"
"log"
"net"
"net/http"
@ -252,7 +251,7 @@ func (s *Server) start() (reterr error) {
c := logtail.Config{
Collection: lpc.Collection,
PrivateID: lpc.PrivateID,
Stderr: ioutil.Discard, // log everything to Buffer
Stderr: io.Discard, // log everything to Buffer
Buffer: s.logbuffer,
NewZstdEncoder: func() logtail.Encoder {
w, err := smallzstd.NewEncoder(nil)

3
tstest/integration/gen_deps.go
View File

@ -11,7 +11,6 @@
"bytes"
"encoding/json"
"fmt"
"io/ioutil"
"log"
"os"
"os/exec"
@ -62,7 +61,7 @@ func generate(goos string) {
fmt.Fprintf(&out, ")\n")
filename := fmt.Sprintf("tailscaled_deps_test_%s.go", goos)
err = ioutil.WriteFile(filename, out.Bytes(), 0644)
err = os.WriteFile(filename, out.Bytes(), 0644)
if err != nil {
log.Fatal(err)
}

5
tstest/integration/integration.go
View File

@ -14,7 +14,6 @@
"encoding/json"
"fmt"
"io"
"io/ioutil"
"log"
"net"
"net/http"
@ -88,7 +87,7 @@ func TailscaledBinary(tb testing.TB) string {
// buildTestBinaries builds tailscale and tailscaled.
// It returns the dir containing the binaries.
func buildTestBinaries() (string, error) {
bindir, err := ioutil.TempDir("", "")
bindir, err := os.MkdirTemp("", "")
if err != nil {
return "", err
}
@ -288,7 +287,7 @@ func (lc *LogCatcher) ServeHTTP(w http.ResponseWriter, r *http.Request) {
defer dec.Close()
body = dec
}
bodyBytes, _ := ioutil.ReadAll(body)
bodyBytes, _ := io.ReadAll(body)
type Entry struct {
Logtail struct {

5
tstest/integration/integration_test.go
View File

@ -14,7 +14,6 @@
"flag"
"fmt"
"io"
"io/ioutil"
"log"
"net/http"
"net/http/httptest"
@ -653,7 +652,7 @@ func newTestNode(t *testing.T, env *testEnv) *testNode {
func (n *testNode) diskPrefs() *ipn.Prefs {
t := n.env.t
t.Helper()
if _, err := ioutil.ReadFile(n.stateFile); err != nil {
if _, err := os.ReadFile(n.stateFile); err != nil {
t.Fatalf("reading prefs: %v", err)
}
fs, err := store.NewFileStore(nil, n.stateFile)
@ -768,7 +767,7 @@ func (op *nodeOutputParser) parseLines() {
if len(buf) == 0 {
op.buf.Reset()
} else {
io.CopyN(ioutil.Discard, &op.buf, int64(op.buf.Len()-len(buf)))
io.CopyN(io.Discard, &op.buf, int64(op.buf.Len()-len(buf)))
}
}

5
tstest/integration/testcontrol/testcontrol.go
View File

@ -14,7 +14,6 @@
"errors"
"fmt"
"io"
"io/ioutil"
"log"
"math/rand"
"net/http"
@ -426,7 +425,7 @@ func (s *Server) CompleteAuth(authPathOrURL string) bool {
}
func (s *Server) serveRegister(w http.ResponseWriter, r *http.Request, mkey key.MachinePublic) {
msg, err := ioutil.ReadAll(io.LimitReader(r.Body, msgLimit))
msg, err := io.ReadAll(io.LimitReader(r.Body, msgLimit))
r.Body.Close()
if err != nil {
http.Error(w, fmt.Sprintf("bad map request read: %v", err), 400)
@ -597,7 +596,7 @@ func (s *Server) serveMap(w http.ResponseWriter, r *http.Request, mkey key.Machi
defer s.incrInServeMap(-1)
ctx := r.Context()
msg, err := ioutil.ReadAll(io.LimitReader(r.Body, msgLimit))
msg, err := io.ReadAll(io.LimitReader(r.Body, msgLimit))
if err != nil {
r.Body.Close()
http.Error(w, fmt.Sprintf("bad map request read: %v", err), 400)

3
tsweb/tsweb.go
View File

@ -13,7 +13,6 @@
"expvar"
"fmt"
"io"
"io/ioutil"
"net"
"net/http"
_ "net/http/pprof"
@ -81,7 +80,7 @@ func AllowDebugAccess(r *http.Request) bool {
urlKey := r.FormValue("debugkey")
keyPath := envknob.String("TS_DEBUG_KEY_PATH")
if urlKey != "" && keyPath != "" {
slurp, err := ioutil.ReadFile(keyPath)
slurp, err := os.ReadFile(keyPath)
if err == nil && string(bytes.TrimSpace(slurp)) == urlKey {
return true
}

3
types/logger/logger.go
View File

@ -14,7 +14,6 @@
"encoding/json"
"fmt"
"io"
"io/ioutil"
"log"
"strings"
"sync"
@ -268,7 +267,7 @@ func (fn ArgWriter) Format(f fmt.State, _ rune) {
argBufioPool.Put(bw)
}
var argBufioPool = &sync.Pool{New: func() any { return bufio.NewWriterSize(ioutil.Discard, 1024) }}
var argBufioPool = &sync.Pool{New: func() any { return bufio.NewWriterSize(io.Discard, 1024) }}
// Filtered returns a Logf that silently swallows some log lines.
// Each inbound format and args is evaluated and printed to a string s.

4
wgengine/magicsock/magicsock_test.go
View File

@ -12,7 +12,7 @@
"encoding/binary"
"errors"
"fmt"
"io/ioutil"
"io"
"math/rand"
"net"
"net/http"
@ -1174,7 +1174,7 @@ func TestDiscoStringLogRace(t *testing.T) {
wg.Add(2)
go func() {
defer wg.Done()
fmt.Fprintf(ioutil.Discard, "%v", de)
fmt.Fprintf(io.Discard, "%v", de)
}()
go func() {
defer wg.Done()

7
wgengine/router/router_linux.go
View File

@ -8,7 +8,6 @@
"bytes"
"errors"
"fmt"
"io/ioutil"
"net/netip"
"os"
"os/exec"
@ -1601,7 +1600,7 @@ func checkIPv6(logf logger.Logf) error {
if os.IsNotExist(err) {
return err
}
bs, err := ioutil.ReadFile("/proc/sys/net/ipv6/conf/all/disable_ipv6")
bs, err := os.ReadFile("/proc/sys/net/ipv6/conf/all/disable_ipv6")
if err != nil {
// Be conservative if we can't find the ipv6 configuration knob.
return err
@ -1617,7 +1616,7 @@ func checkIPv6(logf logger.Logf) error {
// Older kernels don't support IPv6 policy routing. Some kernels
// support policy routing but don't have this knob, so absence of
// the knob is not fatal.
bs, err = ioutil.ReadFile("/proc/sys/net/ipv6/conf/all/disable_policy")
bs, err = os.ReadFile("/proc/sys/net/ipv6/conf/all/disable_policy")
if err == nil {
disabled, err = strconv.ParseBool(strings.TrimSpace(string(bs)))
if err != nil {
@ -1647,7 +1646,7 @@ func checkIPv6(logf logger.Logf) error {
// netfilter, so some older distros ship a kernel that can't NAT IPv6
// traffic.
func supportsV6NAT() bool {
bs, err := ioutil.ReadFile("/proc/net/ip6_tables_names")
bs, err := os.ReadFile("/proc/net/ip6_tables_names")
if err != nil {
// Can't read the file. Assume SNAT works.
return true