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>

4 files changed, 4 insertions, 8 deletions

diff --git a/cmd/podman/images/build.go b/cmd/podman/images/build.go
index 2b24c1cff..a4d6614e2 100644
--- a/cmd/podman/images/build.go
+++ b/cmd/podman/images/build.go
@@ -4,7 +4,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -635,7 +634,7 @@ func getDecryptConfig(decryptionKeys []string) (*encconfig.DecryptConfig, error)
 
 func parseDockerignore(ignoreFile string) ([]string, error) {
 	excludes := []string{}
-	ignore, err := ioutil.ReadFile(ignoreFile)
+	ignore, err := os.ReadFile(ignoreFile)
 	if err != nil {
 		return excludes, err
 	}
diff --git a/cmd/podman/images/import.go b/cmd/podman/images/import.go
index 8343a0bda..7532bf7a9 100644
--- a/cmd/podman/images/import.go
+++ b/cmd/podman/images/import.go
@@ -5,7 +5,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"strings"
 
@@ -116,7 +115,7 @@ func importCon(cmd *cobra.Command, args []string) error {
 	}
 
 	if source == "-" {
-		outFile, err := ioutil.TempFile("", "podman")
+		outFile, err := os.CreateTemp("", "podman")
 		if err != nil {
 			return fmt.Errorf("creating file %v", err)
 		}
diff --git a/cmd/podman/images/load.go b/cmd/podman/images/load.go
index 367b628c7..4aae5217d 100644
--- a/cmd/podman/images/load.go
+++ b/cmd/podman/images/load.go
@@ -5,7 +5,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"strings"
 
@@ -93,7 +92,7 @@ func load(cmd *cobra.Command, args []string) error {
 		if term.IsTerminal(int(os.Stdin.Fd())) {
 			return errors.New("cannot read from terminal, use command-line redirection or the --input flag")
 		}
-		outFile, err := ioutil.TempFile(util.Tmpdir(), "podman")
+		outFile, err := os.CreateTemp(util.Tmpdir(), "podman")
 		if err != nil {
 			return fmt.Errorf("creating file %v", err)
 		}
diff --git a/cmd/podman/images/utils_linux.go b/cmd/podman/images/utils_linux.go
index 935a45667..a2f471a48 100644
--- a/cmd/podman/images/utils_linux.go
+++ b/cmd/podman/images/utils_linux.go
@@ -3,7 +3,6 @@ package images
 import (
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 
@@ -16,7 +15,7 @@ import (
 // the caller should use the returned function to clean up the pipeDir
 func setupPipe() (string, func() <-chan error, error) {
 	errc := make(chan error)
-	pipeDir, err := ioutil.TempDir(os.TempDir(), "pipeDir")
+	pipeDir, err := os.MkdirTemp(os.TempDir(), "pipeDir")
 	if err != nil {
 		return "", nil, err
 	}