Replace deprecated ioutil

Package `io/ioutil` was deprecated in golang 1.16, preventing podman from
building under Fedora 37.  Fortunately, functionality identical
replacements are provided by the packages `io` and `os`.  Replace all
usage of all `io/ioutil` symbols with appropriate substitutions
according to the golang docs.

Signed-off-by: Chris Evich <cevich@redhat.com>

pkg/api/handlers/compat/containers_export.go

@@ -2,7 +2,6 @@ package compat
 
 import (
 	"fmt"
-	"io/ioutil"
 	"net/http"
 	"os"
 
@@ -19,7 +18,7 @@ func ExportContainer(w http.ResponseWriter, r *http.Request) {
 		utils.ContainerNotFound(w, name, err)
 		return
 	}
-	tmpfile, err := ioutil.TempFile("", "api.tar")
+	tmpfile, err := os.CreateTemp("", "api.tar")
 	if err != nil {
 		utils.Error(w, http.StatusInternalServerError, fmt.Errorf("unable to create tempfile: %w", err))
 		return

pkg/api/handlers/compat/images.go

@@ -4,7 +4,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"strings"
@@ -49,7 +48,7 @@ func ExportImage(w http.ResponseWriter, r *http.Request) {
 	// 500 server
 	runtime := r.Context().Value(api.RuntimeKey).(*libpod.Runtime)
 
-	tmpfile, err := ioutil.TempFile("", "api.tar")
+	tmpfile, err := os.CreateTemp("", "api.tar")
 	if err != nil {
 		utils.Error(w, http.StatusInternalServerError, fmt.Errorf("unable to create tempfile: %w", err))
 		return
@@ -193,7 +192,7 @@ func CreateImageFromSrc(w http.ResponseWriter, r *http.Request) {
 	// fromSrc – Source to import. The value may be a URL from which the image can be retrieved or - to read the image from the request body. This parameter may only be used when importing an image.
 	source := query.FromSrc
 	if source == "-" {
-		f, err := ioutil.TempFile("", "api_load.tar")
+		f, err := os.CreateTemp("", "api_load.tar")
 		if err != nil {
 			utils.Error(w, http.StatusInternalServerError, fmt.Errorf("failed to create tempfile: %w", err))
 			return
@@ -480,7 +479,7 @@ func LoadImages(w http.ResponseWriter, r *http.Request) {
 
 	// First write the body to a temporary file that we can later attempt
 	// to load.
-	f, err := ioutil.TempFile("", "api_load.tar")
+	f, err := os.CreateTemp("", "api_load.tar")
 	if err != nil {
 		utils.Error(w, http.StatusInternalServerError, fmt.Errorf("failed to create tempfile: %w", err))
 		return
@@ -547,7 +546,7 @@ func ExportImages(w http.ResponseWriter, r *http.Request) {
 		images[i] = possiblyNormalizedName
 	}
 
-	tmpfile, err := ioutil.TempFile("", "api.tar")
+	tmpfile, err := os.CreateTemp("", "api.tar")
 	if err != nil {
 		utils.Error(w, http.StatusInternalServerError, fmt.Errorf("unable to create tempfile: %w", err))
 		return

pkg/api/handlers/compat/images_build.go

@@ -6,7 +6,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -182,7 +181,7 @@ func BuildImage(w http.ResponseWriter, r *http.Request) {
 	dockerFileSet := false
 	if utils.IsLibpodRequest(r) && query.Remote != "" {
 		// The context directory could be a URL.  Try to handle that.
-		anchorDir, err := ioutil.TempDir(parse.GetTempDir(), "libpod_builder")
+		anchorDir, err := os.MkdirTemp(parse.GetTempDir(), "libpod_builder")
 		if err != nil {
 			utils.InternalServerError(w, err)
 		}
@@ -730,7 +729,7 @@ func BuildImage(w http.ResponseWriter, r *http.Request) {
 	if logrus.IsLevelEnabled(logrus.DebugLevel) {
 		if v, found := os.LookupEnv("PODMAN_RETAIN_BUILD_ARTIFACT"); found {
 			if keep, _ := strconv.ParseBool(v); keep {
-				t, _ := ioutil.TempFile("", "build_*_server")
+				t, _ := os.CreateTemp("", "build_*_server")
 				defer t.Close()
 				body = io.MultiWriter(t, w)
 			}
@@ -852,7 +851,7 @@ func parseLibPodIsolation(isolation string) (buildah.Isolation, error) {
 
 func extractTarFile(r *http.Request) (string, error) {
 	// build a home for the request body
-	anchorDir, err := ioutil.TempDir("", "libpod_builder")
+	anchorDir, err := os.MkdirTemp("", "libpod_builder")
 	if err != nil {
 		return "", err
 	}

pkg/api/handlers/compat/images_push.go

@@ -4,8 +4,9 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
+	"os"
 	"strings"
 
 	"github.com/containers/image/v5/types"
@@ -26,7 +27,7 @@ func PushImage(w http.ResponseWriter, r *http.Request) {
 	decoder := r.Context().Value(api.DecoderKey).(*schema.Decoder)
 	runtime := r.Context().Value(api.RuntimeKey).(*libpod.Runtime)
 
-	digestFile, err := ioutil.TempFile("", "digest.txt")
+	digestFile, err := os.CreateTemp("", "digest.txt")
 	if err != nil {
 		utils.Error(w, http.StatusInternalServerError, fmt.Errorf("unable to create tempfile: %w", err))
 		return
@@ -186,7 +187,7 @@ loop: // break out of for/select infinite loop
 				break loop
 			}
 
-			digestBytes, err := ioutil.ReadAll(digestFile)
+			digestBytes, err := io.ReadAll(digestFile)
 			if err != nil {
 				report.Error = &jsonmessage.JSONError{
 					Message: err.Error(),

pkg/api/handlers/libpod/containers.go

@@ -4,7 +4,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"strings"
@@ -248,7 +247,7 @@ func Checkpoint(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if query.Export {
-		f, err := ioutil.TempFile("", "checkpoint")
+		f, err := os.CreateTemp("", "checkpoint")
 		if err != nil {
 			utils.InternalServerError(w, err)
 			return
@@ -329,7 +328,7 @@ func Restore(w http.ResponseWriter, r *http.Request) {
 
 	var names []string
 	if query.Import {
-		t, err := ioutil.TempFile("", "restore")
+		t, err := os.CreateTemp("", "restore")
 		if err != nil {
 			utils.InternalServerError(w, err)
 			return

pkg/api/handlers/libpod/images.go

@@ -4,7 +4,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"strconv"
@@ -182,7 +181,7 @@ func ExportImage(w http.ResponseWriter, r *http.Request) {
 
 	switch query.Format {
 	case define.OCIArchive, define.V2s2Archive:
-		tmpfile, err := ioutil.TempFile("", "api.tar")
+		tmpfile, err := os.CreateTemp("", "api.tar")
 		if err != nil {
 			utils.Error(w, http.StatusInternalServerError, fmt.Errorf("unable to create tempfile: %w", err))
 			return
@@ -193,7 +192,7 @@ func ExportImage(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 	case define.OCIManifestDir, define.V2s2ManifestDir:
-		tmpdir, err := ioutil.TempDir("", "save")
+		tmpdir, err := os.MkdirTemp("", "save")
 		if err != nil {
 			utils.Error(w, http.StatusInternalServerError, fmt.Errorf("unable to create tempdir: %w", err))
 			return
@@ -279,7 +278,7 @@ func ExportImages(w http.ResponseWriter, r *http.Request) {
 
 	switch query.Format {
 	case define.V2s2Archive, define.OCIArchive:
-		tmpfile, err := ioutil.TempFile("", "api.tar")
+		tmpfile, err := os.CreateTemp("", "api.tar")
 		if err != nil {
 			utils.Error(w, http.StatusInternalServerError, fmt.Errorf("unable to create tempfile: %w", err))
 			return
@@ -290,7 +289,7 @@ func ExportImages(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 	case define.OCIManifestDir, define.V2s2ManifestDir:
-		tmpdir, err := ioutil.TempDir("", "save")
+		tmpdir, err := os.MkdirTemp("", "save")
 		if err != nil {
 			utils.Error(w, http.StatusInternalServerError, fmt.Errorf("unable to create tmpdir: %w", err))
 			return
@@ -329,7 +328,7 @@ func ExportImages(w http.ResponseWriter, r *http.Request) {
 func ImagesLoad(w http.ResponseWriter, r *http.Request) {
 	runtime := r.Context().Value(api.RuntimeKey).(*libpod.Runtime)
 
-	tmpfile, err := ioutil.TempFile("", "libpod-images-load.tar")
+	tmpfile, err := os.CreateTemp("", "libpod-images-load.tar")
 	if err != nil {
 		utils.Error(w, http.StatusInternalServerError, fmt.Errorf("unable to create tempfile: %w", err))
 		return
@@ -378,7 +377,7 @@ func ImagesImport(w http.ResponseWriter, r *http.Request) {
 	// Check if we need to load the image from a URL or from the request's body.
 	source := query.URL
 	if len(query.URL) == 0 {
-		tmpfile, err := ioutil.TempFile("", "libpod-images-import.tar")
+		tmpfile, err := os.CreateTemp("", "libpod-images-import.tar")
 		if err != nil {
 			utils.Error(w, http.StatusInternalServerError, fmt.Errorf("unable to create tempfile: %w", err))
 			return

pkg/api/handlers/libpod/manifests.go

@@ -5,7 +5,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"net/url"
 	"strconv"
@@ -83,7 +83,7 @@ func ManifestCreate(w http.ResponseWriter, r *http.Request) {
 		status = http.StatusCreated
 	}
 
-	buffer, err := ioutil.ReadAll(r.Body)
+	buffer, err := io.ReadAll(r.Body)
 	if err != nil {
 		utils.InternalServerError(w, err)
 		return

pkg/api/server/handler_logging.go

@@ -2,7 +2,6 @@ package server
 
 import (
 	"io"
-	"io/ioutil"
 	"net/http"
 	"time"
 
@@ -41,7 +40,7 @@ func loggingHandler() mux.MiddlewareFunc {
 				"API":            "request",
 				"X-Reference-Id": r.Header.Get("X-Reference-Id"),
 			})
-			r.Body = ioutil.NopCloser(
+			r.Body = io.NopCloser(
 				io.TeeReader(r.Body, annotated.WriterLevel(logrus.TraceLevel)))
 
 			w = responseWriter{ResponseWriter: w}

pkg/api/server/handler_rid.go

@@ -2,7 +2,7 @@ package server
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 
 	"github.com/containers/podman/v4/pkg/api/types"
@@ -17,7 +17,7 @@ import (
 func referenceIDHandler() mux.MiddlewareFunc {
 	return func(h http.Handler) http.Handler {
 		// Only log Apache access_log-like entries at Info level or below
-		out := ioutil.Discard
+		out := io.Discard
 		if logrus.IsLevelEnabled(logrus.InfoLevel) {
 			out = logrus.StandardLogger().Out
 		}

pkg/auth/auth.go

@@ -4,7 +4,6 @@ import (
 	"encoding/base64"
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"strings"
@@ -233,7 +232,7 @@ func encodeMultiAuthConfigs(authConfigs map[string]types.DockerAuthConfig) (stri
 // TMPDIR will be used.
 func authConfigsToAuthFile(authConfigs map[string]types.DockerAuthConfig) (string, error) {
 	// Initialize an empty temporary JSON file.
-	tmpFile, err := ioutil.TempFile("", "auth.json.")
+	tmpFile, err := os.CreateTemp("", "auth.json.")
 	if err != nil {
 		return "", err
 	}

pkg/auth/auth_test.go

@@ -3,7 +3,6 @@ package auth
 import (
 	"encoding/base64"
 	"encoding/json"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"testing"
@@ -37,10 +36,10 @@ func systemContextForAuthFile(t *testing.T, fileContents string) (*types.SystemC
 		return nil, func() {}
 	}
 
-	f, err := ioutil.TempFile("", "auth.json")
+	f, err := os.CreateTemp("", "auth.json")
 	require.NoError(t, err)
 	path := f.Name()
-	err = ioutil.WriteFile(path, []byte(fileContents), 0700)
+	err = os.WriteFile(path, []byte(fileContents), 0700)
 	require.NoError(t, err)
 	return &types.SystemContext{AuthFilePath: path}, func() { os.Remove(path) }
 }
@@ -347,7 +346,7 @@ func TestAuthConfigsToAuthFile(t *testing.T) {
 			assert.Empty(t, filePath)
 		} else {
 			assert.NoError(t, err)
-			content, err := ioutil.ReadFile(filePath)
+			content, err := os.ReadFile(filePath)
 			require.NoError(t, err)
 			assert.Contains(t, string(content), tc.expectedContains)
 			os.Remove(filePath)

pkg/bindings/errors.go

@@ -4,7 +4,7 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"io"
 
 	"github.com/containers/podman/v4/pkg/errorhandling"
 )
@@ -29,7 +29,7 @@ func (h APIResponse) Process(unmarshalInto interface{}) error {
 // ProcessWithError drains the response body, and processes the HTTP status code
 // Note: Closing the response.Body is left to the caller
 func (h APIResponse) ProcessWithError(unmarshalInto interface{}, unmarshalErrorInto interface{}) error {
-	data, err := ioutil.ReadAll(h.Response.Body)
+	data, err := io.ReadAll(h.Response.Body)
 	if err != nil {
 		return fmt.Errorf("unable to process API response: %w", err)
 	}

pkg/bindings/manifests/manifests.go

@@ -6,7 +6,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	"os"
 	"strconv"
@@ -257,7 +256,7 @@ func Modify(ctx context.Context, name string, images []string, options *ModifyOp
 	}
 	defer response.Body.Close()
 
-	data, err := ioutil.ReadAll(response.Body)
+	data, err := io.ReadAll(response.Body)
 	if err != nil {
 		return "", fmt.Errorf("unable to process API response: %w", err)
 	}

pkg/checkpoint/checkpoint_restore.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 
 	metadata "github.com/checkpoint-restore/checkpointctl/lib"
@@ -26,7 +25,7 @@ import (
 func CRImportCheckpointTar(ctx context.Context, runtime *libpod.Runtime, restoreOptions entities.RestoreOptions) ([]*libpod.Container, error) {
 	// First get the container definition from the
 	// tarball to a temporary directory
-	dir, err := ioutil.TempDir("", "checkpoint")
+	dir, err := os.MkdirTemp("", "checkpoint")
 	if err != nil {
 		return nil, err
 	}

pkg/checkpoint/crutils/checkpoint_restore_utils.go

@@ -5,7 +5,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -237,7 +236,7 @@ func CRRuntimeSupportsPodCheckpointRestore(runtimePath string) bool {
 // given checkpoint archive and returns the runtime used to create
 // the given checkpoint archive.
 func CRGetRuntimeFromArchive(input string) (*string, error) {
-	dir, err := ioutil.TempDir("", "checkpoint")
+	dir, err := os.MkdirTemp("", "checkpoint")
 	if err != nil {
 		return nil, err
 	}

pkg/ctime/ctime_test.go

@@ -1,7 +1,6 @@
 package ctime
 
 import (
-	"io/ioutil"
 	"os"
 	"testing"
 	"time"
@@ -10,13 +9,13 @@ import (
 func TestCreated(t *testing.T) {
 	before := time.Now()
 
-	fileA, err := ioutil.TempFile("", "ctime-test-")
+	fileA, err := os.CreateTemp("", "ctime-test-")
 	if err != nil {
 		t.Error(err)
 	}
 	defer os.Remove(fileA.Name())
 
-	fileB, err := ioutil.TempFile("", "ctime-test-")
+	fileB, err := os.CreateTemp("", "ctime-test-")
 	if err != nil {
 		t.Error(err)
 	}

pkg/domain/infra/abi/images.go

@@ -5,7 +5,6 @@ import (
 	"errors"
 	"fmt"
 	"io/fs"
-	"io/ioutil"
 	"net/url"
 	"os"
 	"os/exec"
@@ -340,7 +339,7 @@ func (ir *ImageEngine) Push(ctx context.Context, source string, destination stri
 				return err
 			}
 
-			if err := ioutil.WriteFile(options.DigestFile, []byte(manifestDigest.String()), 0644); err != nil {
+			if err := os.WriteFile(options.DigestFile, []byte(manifestDigest.String()), 0644); err != nil {
 				return err
 			}
 		}
@@ -910,5 +909,5 @@ func putSignature(manifestBlob []byte, mech signature.SigningMechanism, sigStore
 	if err != nil {
 		return err
 	}
-	return ioutil.WriteFile(filepath.Join(signatureDir, sigFilename), newSig, 0644)
+	return os.WriteFile(filepath.Join(signatureDir, sigFilename), newSig, 0644)
 }

pkg/domain/infra/abi/play.go

@@ -6,7 +6,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strconv"
@@ -116,7 +115,7 @@ func (ic *ContainerEngine) PlayKube(ctx context.Context, body io.Reader, options
 	validKinds := 0
 
 	// read yaml document
-	content, err := ioutil.ReadAll(body)
+	content, err := io.ReadAll(body)
 	if err != nil {
 		return nil, err
 	}
@@ -873,7 +872,7 @@ func (ic *ContainerEngine) playKubePVC(ctx context.Context, pvcYAML *v1.Persiste
 func readConfigMapFromFile(r io.Reader) (v1.ConfigMap, error) {
 	var cm v1.ConfigMap
 
-	content, err := ioutil.ReadAll(r)
+	content, err := io.ReadAll(r)
 	if err != nil {
 		return cm, fmt.Errorf("unable to read ConfigMap YAML content: %w", err)
 	}
@@ -1005,7 +1004,7 @@ func (ic *ContainerEngine) PlayKubeDown(ctx context.Context, body io.Reader, _ e
 	reports := new(entities.PlayKubeReport)
 
 	// read yaml document
-	content, err := ioutil.ReadAll(body)
+	content, err := io.ReadAll(body)
 	if err != nil {
 		return nil, err
 	}

pkg/domain/infra/abi/secrets.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"path/filepath"
 	"strings"
 
@@ -14,7 +13,7 @@ import (
 )
 
 func (ic *ContainerEngine) SecretCreate(ctx context.Context, name string, reader io.Reader, options entities.SecretCreateOptions) (*entities.SecretCreateReport, error) {
-	data, _ := ioutil.ReadAll(reader)
+	data, _ := io.ReadAll(reader)
 	secretsPath := ic.Libpod.GetSecretsStorageDir()
 	manager, err := ic.Libpod.SecretsManager()
 	if err != nil {

pkg/domain/infra/abi/trust.go

@@ -3,7 +3,7 @@ package abi
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
+	"os"
 
 	"github.com/containers/podman/v4/pkg/domain/entities"
 	"github.com/containers/podman/v4/pkg/trust"
@@ -18,7 +18,7 @@ func (ir *ImageEngine) ShowTrust(ctx context.Context, args []string, options ent
 	if len(options.PolicyPath) > 0 {
 		policyPath = options.PolicyPath
 	}
-	report.Raw, err = ioutil.ReadFile(policyPath)
+	report.Raw, err = os.ReadFile(policyPath)
 	if err != nil {
 		return nil, err
 	}

pkg/domain/infra/tunnel/images.go

@@ -4,7 +4,6 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"strconv"
 	"strings"
@@ -264,7 +263,7 @@ func (ir *ImageEngine) Save(ctx context.Context, nameOrID string, tags []string,
 
 	switch opts.Format {
 	case "oci-dir", "docker-dir":
-		f, err = ioutil.TempFile("", "podman_save")
+		f, err = os.CreateTemp("", "podman_save")
 		if err == nil {
 			defer func() { _ = os.Remove(f.Name()) }()
 		}

pkg/domain/utils/scp.go

@@ -2,7 +2,6 @@ package utils
 
 import (
 	"fmt"
-	"io/ioutil"
 	"net/url"
 	"os"
 	"os/exec"
@@ -29,7 +28,7 @@ func ExecuteTransfer(src, dst string, parentFlags []string, quiet bool, sshMode
 		return nil, nil, nil, nil, err
 	}
 
-	f, err := ioutil.TempFile("", "podman") // open temp file for load/save output
+	f, err := os.CreateTemp("", "podman") // open temp file for load/save output
 	if err != nil {
 		return nil, nil, nil, nil, err
 	}

pkg/machine/config.go

@@ -5,7 +5,6 @@ package machine
 
 import (
 	"errors"
-	"io/ioutil"
 	"net"
 	"net/url"
 	"os"
@@ -283,7 +282,7 @@ func (m *VMFile) Delete() error {
 
 // Read the contents of a given file and return in []bytes
 func (m *VMFile) Read() ([]byte, error) {
-	return ioutil.ReadFile(m.GetPath())
+	return os.ReadFile(m.GetPath())
 }
 
 // NewMachineFile is a constructor for VMFile

pkg/machine/e2e/init_test.go

@@ -1,7 +1,6 @@
 package e2e_test
 
 import (
-	"io/ioutil"
 	"os"
 	"strconv"
 	"time"
@@ -138,9 +137,9 @@ var _ = Describe("podman machine init", func() {
 	})
 
 	It("machine init with volume", func() {
-		tmpDir, err := ioutil.TempDir("", "")
+		tmpDir, err := os.MkdirTemp("", "")
 		Expect(err).To(BeNil())
-		_, err = ioutil.TempFile(tmpDir, "example")
+		_, err = os.CreateTemp(tmpDir, "example")
 		Expect(err).To(BeNil())
 		mount := tmpDir + ":/testmountdir"
 		defer os.RemoveAll(tmpDir)

pkg/machine/e2e/machine_test.go

@@ -3,7 +3,6 @@ package e2e_test
 import (
 	"fmt"
 	"io"
-	"io/ioutil"
 	url2 "net/url"
 	"os"
 	"path"
@@ -77,7 +76,7 @@ var _ = SynchronizedAfterSuite(func() {},
 
 func setup() (string, *machineTestBuilder) {
 	// Set TMPDIR if this needs a new directory
-	homeDir, err := ioutil.TempDir("", "podman_test")
+	homeDir, err := os.MkdirTemp("", "podman_test")
 	if err != nil {
 		Fail(fmt.Sprintf("failed to create home directory: %q", err))
 	}

pkg/machine/fcos.go

@@ -6,7 +6,7 @@ package machine
 import (
 	"encoding/json"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	url2 "net/url"
 	"os"
@@ -175,7 +175,7 @@ func GetFCOSDownload(imageStream string) (*FcosDownloadInfo, error) {
 	if err != nil {
 		return nil, err
 	}
-	body, err := ioutil.ReadAll(resp.Body)
+	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return nil, err
 	}

pkg/machine/ignition.go

@@ -7,7 +7,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io/fs"
-	"io/ioutil"
 	"net/url"
 	"os"
 	"path/filepath"
@@ -227,7 +226,7 @@ WantedBy=sysinit.target
 	if err != nil {
 		return err
 	}
-	return ioutil.WriteFile(ign.WritePath, b, 0644)
+	return os.WriteFile(ign.WritePath, b, 0644)
 }
 
 func getDirs(usrName string) []Directory {
@@ -559,7 +558,7 @@ func getCerts(certsDir string, isDir bool) []File {
 }
 
 func prepareCertFile(path string, name string) (File, error) {
-	b, err := ioutil.ReadFile(path)
+	b, err := os.ReadFile(path)
 	if err != nil {
 		logrus.Warnf("Unable to read cert file %v", err)
 		return File{}, err

pkg/machine/keys.go

@@ -7,7 +7,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -27,7 +26,7 @@ func CreateSSHKeys(writeLocation string) (string, error) {
 	if err := generatekeys(writeLocation); err != nil {
 		return "", err
 	}
-	b, err := ioutil.ReadFile(writeLocation + ".pub")
+	b, err := os.ReadFile(writeLocation + ".pub")
 	if err != nil {
 		return "", err
 	}
@@ -45,7 +44,7 @@ func CreateSSHKeysPrefix(dir string, file string, passThru bool, skipExisting bo
 	} else {
 		fmt.Println("Keys already exist, reusing")
 	}
-	b, err := ioutil.ReadFile(filepath.Join(dir, file) + ".pub")
+	b, err := os.ReadFile(filepath.Join(dir, file) + ".pub")
 	if err != nil {
 		return "", err
 	}

pkg/machine/pull.go

@@ -8,7 +8,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net/http"
 	url2 "net/url"
 	"os"
@@ -191,7 +190,7 @@ func Decompress(localPath, uncompressedPath string) error {
 	if err != nil {
 		return err
 	}
-	sourceFile, err := ioutil.ReadFile(localPath)
+	sourceFile, err := os.ReadFile(localPath)
 	if err != nil {
 		return err
 	}

pkg/machine/qemu/claim_darwin.go

@@ -2,7 +2,7 @@ package qemu
 
 import (
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net"
 	"os"
 	"os/user"
@@ -43,7 +43,7 @@ func claimDockerSock() bool {
 		return false
 	}
 	_ = con.SetReadDeadline(time.Now().Add(time.Second * 5))
-	read, err := ioutil.ReadAll(con)
+	read, err := io.ReadAll(con)
 
 	return err == nil && string(read) == "OK"
 }

pkg/machine/qemu/machine.go

@@ -12,7 +12,6 @@ import (
 	"errors"
 	"fmt"
 	"io/fs"
-	"io/ioutil"
 	"net"
 	"net/http"
 	"net/url"
@@ -391,11 +390,11 @@ func (v *MachineVM) Init(opts machine.InitOptions) (bool, error) {
 	// If the user provides an ignition file, we need to
 	// copy it into the conf dir
 	if len(opts.IgnitionPath) > 0 {
-		inputIgnition, err := ioutil.ReadFile(opts.IgnitionPath)
+		inputIgnition, err := os.ReadFile(opts.IgnitionPath)
 		if err != nil {
 			return false, err
 		}
-		return false, ioutil.WriteFile(v.getIgnitionFile(), inputIgnition, 0644)
+		return false, os.WriteFile(v.getIgnitionFile(), inputIgnition, 0644)
 	}
 	// Write the ignition file
 	ign := machine.DynamicIgnition{
@@ -1109,7 +1108,7 @@ func getVMInfos() ([]*machine.ListResponse, error) {
 		vm := new(MachineVM)
 		if strings.HasSuffix(d.Name(), ".json") {
 			fullPath := filepath.Join(vmConfigDir, d.Name())
-			b, err := ioutil.ReadFile(fullPath)
+			b, err := os.ReadFile(fullPath)
 			if err != nil {
 				return err
 			}
@@ -1539,7 +1538,7 @@ func (v *MachineVM) writeConfig() error {
 	if err != nil {
 		return err
 	}
-	if err := ioutil.WriteFile(v.ConfigPath.GetPath(), b, 0644); err != nil {
+	if err := os.WriteFile(v.ConfigPath.GetPath(), b, 0644); err != nil {
 		return err
 	}
 	return nil

pkg/machine/wsl/machine.go

@@ -10,7 +10,6 @@ import (
 	"fmt"
 	"io"
 	"io/fs"
-	"io/ioutil"
 	"net/url"
 	"os"
 	"os/exec"
@@ -423,7 +422,7 @@ func (v *MachineVM) writeConfig() error {
 	if err != nil {
 		return err
 	}
-	if err := ioutil.WriteFile(jsonFile, b, 0644); err != nil {
+	if err := os.WriteFile(jsonFile, b, 0644); err != nil {
 		return fmt.Errorf("could not write machine json config: %w", err)
 	}
 
@@ -1285,7 +1284,7 @@ func readWinProxyTid(v *MachineVM) (uint32, uint32, string, error) {
 	}
 
 	tidFile := filepath.Join(stateDir, winSshProxyTid)
-	contents, err := ioutil.ReadFile(tidFile)
+	contents, err := os.ReadFile(tidFile)
 	if err != nil {
 		return 0, 0, "", err
 	}

pkg/machine/wsl/util_windows.go

@@ -4,7 +4,6 @@ import (
 	"encoding/base64"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -209,7 +208,7 @@ func reboot() error {
 		return fmt.Errorf("could not create data directory: %w", err)
 	}
 	commFile := filepath.Join(dataDir, "podman-relaunch.dat")
-	if err := ioutil.WriteFile(commFile, []byte(encoded), 0600); err != nil {
+	if err := os.WriteFile(commFile, []byte(encoded), 0600); err != nil {
 		return fmt.Errorf("could not serialize command state: %w", err)
 	}
 

pkg/rootless/rootless_linux.go

@@ -9,7 +9,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	gosignal "os/signal"
@@ -224,7 +223,7 @@ func GetConfiguredMappings() ([]idtools.IDMap, []idtools.IDMap, error) {
 }
 
 func copyMappings(from, to string) error {
-	content, err := ioutil.ReadFile(from)
+	content, err := os.ReadFile(from)
 	if err != nil {
 		return err
 	}
@@ -235,7 +234,7 @@ func copyMappings(from, to string) error {
 	if bytes.Contains(content, []byte("4294967295")) {
 		content = []byte("0 0 1\n1 1 4294967294\n")
 	}
-	return ioutil.WriteFile(to, content, 0600)
+	return os.WriteFile(to, content, 0600)
 }
 
 func becomeRootInUserNS(pausePid, fileToRead string, fileOutput *os.File) (_ bool, _ int, retErr error) {
@@ -343,13 +342,13 @@ func becomeRootInUserNS(pausePid, fileToRead string, fileOutput *os.File) (_ boo
 	if !uidsMapped {
 		logrus.Warnf("Using rootless single mapping into the namespace. This might break some images. Check /etc/subuid and /etc/subgid for adding sub*ids if not using a network user")
 		setgroups := fmt.Sprintf("/proc/%d/setgroups", pid)
-		err = ioutil.WriteFile(setgroups, []byte("deny\n"), 0666)
+		err = os.WriteFile(setgroups, []byte("deny\n"), 0666)
 		if err != nil {
 			return false, -1, fmt.Errorf("cannot write setgroups file: %w", err)
 		}
 		logrus.Debugf("write setgroups file exited with 0")
 
-		err = ioutil.WriteFile(uidMap, []byte(fmt.Sprintf("%d %d 1\n", 0, os.Geteuid())), 0666)
+		err = os.WriteFile(uidMap, []byte(fmt.Sprintf("%d %d 1\n", 0, os.Geteuid())), 0666)
 		if err != nil {
 			return false, -1, fmt.Errorf("cannot write uid_map: %w", err)
 		}
@@ -369,7 +368,7 @@ func becomeRootInUserNS(pausePid, fileToRead string, fileOutput *os.File) (_ boo
 		gidsMapped = err == nil
 	}
 	if !gidsMapped {
-		err = ioutil.WriteFile(gidMap, []byte(fmt.Sprintf("%d %d 1\n", 0, os.Getegid())), 0666)
+		err = os.WriteFile(gidMap, []byte(fmt.Sprintf("%d %d 1\n", 0, os.Getegid())), 0666)
 		if err != nil {
 			return false, -1, fmt.Errorf("cannot write gid_map: %w", err)
 		}
@@ -399,7 +398,7 @@ func becomeRootInUserNS(pausePid, fileToRead string, fileOutput *os.File) (_ boo
 		// We have lost the race for writing the PID file, as probably another
 		// process created a namespace and wrote the PID.
 		// Try to join it.
-		data, err := ioutil.ReadFile(pausePid)
+		data, err := os.ReadFile(pausePid)
 		if err == nil {
 			var pid uint64
 			pid, err = strconv.ParseUint(string(data), 10, 0)
@@ -469,7 +468,7 @@ func TryJoinFromFilePaths(pausePidPath string, needNewNamespace bool, paths []st
 
 	for _, path := range paths {
 		if !needNewNamespace {
-			data, err := ioutil.ReadFile(path)
+			data, err := os.ReadFile(path)
 			if err != nil {
 				lastErr = err
 				continue

pkg/specgen/generate/config_linux_cgo.go

@@ -7,7 +7,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"io/ioutil"
+	"os"
 
 	"github.com/containers/common/libimage"
 	goSeccomp "github.com/containers/common/pkg/seccomp"
@@ -47,7 +47,7 @@ func getSeccompConfig(s *specgen.SpecGenerator, configSpec *spec.Spec, img *libi
 
 	if s.SeccompProfilePath != "" {
 		logrus.Debugf("Loading seccomp profile from %q", s.SeccompProfilePath)
-		seccompProfile, err := ioutil.ReadFile(s.SeccompProfilePath)
+		seccompProfile, err := os.ReadFile(s.SeccompProfilePath)
 		if err != nil {
 			return nil, fmt.Errorf("opening seccomp profile failed: %w", err)
 		}

pkg/specgen/generate/pause_image.go

@@ -3,7 +3,6 @@ package generate
 import (
 	"context"
 	"fmt"
-	"io/ioutil"
 	"os"
 
 	buildahDefine "github.com/containers/buildah/define"
@@ -62,7 +61,7 @@ func buildPauseImage(rt *libpod.Runtime, rtConfig *config.Config) (string, error
 COPY %s /catatonit
 ENTRYPOINT ["/catatonit", "-P"]`, catatonitPath)
 
-	tmpF, err := ioutil.TempFile("", "pause.containerfile")
+	tmpF, err := os.CreateTemp("", "pause.containerfile")
 	if err != nil {
 		return "", err
 	}

pkg/specgen/generate/validate.go

@@ -3,7 +3,6 @@ package generate
 import (
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 
@@ -180,7 +179,7 @@ func verifyContainerResourcesCgroupV2(s *specgen.SpecGenerator) ([]string, error
 			// If running under the root cgroup try to create or reuse a "probe" cgroup to read memory values
 			own = "podman_probe"
 			_ = os.MkdirAll(filepath.Join("/sys/fs/cgroup", own), 0o755)
-			_ = ioutil.WriteFile("/sys/fs/cgroup/cgroup.subtree_control", []byte("+memory"), 0o644)
+			_ = os.WriteFile("/sys/fs/cgroup/cgroup.subtree_control", []byte("+memory"), 0o644)
 		}
 
 		memoryMax := filepath.Join("/sys/fs/cgroup", own, "memory.max")

pkg/specgenutil/util.go

@@ -3,7 +3,6 @@ package specgenutil
 import (
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"net"
 	"os"
 	"strconv"
@@ -18,7 +17,7 @@ import (
 // ReadPodIDFile reads the specified file and returns its content (i.e., first
 // line).
 func ReadPodIDFile(path string) (string, error) {
-	content, err := ioutil.ReadFile(path)
+	content, err := os.ReadFile(path)
 	if err != nil {
 		return "", fmt.Errorf("reading pod ID file: %w", err)
 	}

pkg/systemd/notifyproxy/notifyproxy.go

@@ -4,7 +4,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"net"
 	"os"
 	"strings"
@@ -49,7 +48,7 @@ type NotifyProxy struct {
 
 // New creates a NotifyProxy.  The specified temp directory can be left empty.
 func New(tmpDir string) (*NotifyProxy, error) {
-	tempFile, err := ioutil.TempFile(tmpDir, "-podman-notify-proxy.sock")
+	tempFile, err := os.CreateTemp(tmpDir, "-podman-notify-proxy.sock")
 	if err != nil {
 		return nil, err
 	}

pkg/trust/policy.go

@@ -7,7 +7,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -72,7 +71,7 @@ type gpgIDReader func(string) []string
 
 // createTmpFile creates a temp file under dir and writes the content into it
 func createTmpFile(dir, pattern string, content []byte) (string, error) {
-	tmpfile, err := ioutil.TempFile(dir, pattern)
+	tmpfile, err := os.CreateTemp(dir, pattern)
 	if err != nil {
 		return "", err
 	}
@@ -133,7 +132,7 @@ func parseUids(colonDelimitKeys []byte) []string {
 // getPolicy parses policy.json into policyContent.
 func getPolicy(policyPath string) (policyContent, error) {
 	var policyContentStruct policyContent
-	policyContent, err := ioutil.ReadFile(policyPath)
+	policyContent, err := os.ReadFile(policyPath)
 	if err != nil {
 		return policyContentStruct, fmt.Errorf("unable to read policy file: %w", err)
 	}
@@ -207,7 +206,7 @@ func AddPolicyEntries(policyPath string, input AddPolicyEntriesInput) error {
 
 	_, err = os.Stat(policyPath)
 	if !os.IsNotExist(err) {
-		policyContent, err := ioutil.ReadFile(policyPath)
+		policyContent, err := os.ReadFile(policyPath)
 		if err != nil {
 			return err
 		}
@@ -244,5 +243,5 @@ func AddPolicyEntries(policyPath string, input AddPolicyEntriesInput) error {
 	if err != nil {
 		return fmt.Errorf("setting trust policy: %w", err)
 	}
-	return ioutil.WriteFile(policyPath, data, 0644)
+	return os.WriteFile(policyPath, data, 0644)
 }

pkg/trust/registries.go

@@ -2,7 +2,6 @@ package trust
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
@@ -72,7 +71,7 @@ func loadAndMergeConfig(dirPath string) (*registryConfiguration, error) {
 			continue
 		}
 		configPath := filepath.Join(dirPath, configName)
-		configBytes, err := ioutil.ReadFile(configPath)
+		configBytes, err := os.ReadFile(configPath)
 		if err != nil {
 			return nil, err
 		}