Refactor file reading methods to use os and io packages

Author: codeyourweb

.gitignore

@@ -3,4 +3,5 @@
 *.iml
 .vscode/
 .history/
-bin/
+bin/
+*.exe

configuration.go

@@ -3,8 +3,9 @@ package main
 import (
 	"bytes"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
+	"os"
 	"path/filepath"
 	"regexp"
 	"strings"
@@ -87,13 +88,13 @@ func (c *Configuration) getConfiguration(configFile string) *Configuration {
 		if err != nil {
 			LogFatal(fmt.Sprintf("Configuration file URL unreachable %v", err))
 		}
-		yamlContent, err = ioutil.ReadAll(response.Body)
+		yamlContent, err = io.ReadAll(response.Body)
 		if err != nil {
 			LogFatal(fmt.Sprintf("Configuration file URL content unreadable %v", err))
 		}
 		response.Body.Close()
 	} else {
-		yamlContent, err = ioutil.ReadFile(configFile)
+		yamlContent, err = os.ReadFile(configFile)
 		if err != nil {
 			LogFatal(fmt.Sprintf("Configuration file reading error %v ", err))
 		}

finder.go

@@ -6,7 +6,8 @@ import (
 	"crypto/sha1"
 	"crypto/sha256"
 	"fmt"
-	"io/ioutil"
+	"io"
+	"os"
 	"runtime/debug"
 	"strings"
 	"time"
@@ -36,11 +37,11 @@ func FindInFilesContent(files *[]string, patterns []string, rules *yara.Rules, h
 	var matchingFiles []string
 
 	for _, path := range *files {
-		b, err := ioutil.ReadFile(path)
+		b, err := os.ReadFile(path)
 		if err != nil {
 			if triageMode {
 				time.Sleep(500 * time.Millisecond)
-				b, err = ioutil.ReadFile(path)
+				b, err = os.ReadFile(path)
 				if err != nil {
 					LogMessage(LOG_ERROR, "(ERROR)", "Unable to read file", path)
 					continue
@@ -107,7 +108,7 @@ func FindInFilesContent(files *[]string, patterns []string, rules *yara.Rules, h
 				}
 				defer fr.Close()
 
-				body, err := ioutil.ReadAll(fr)
+				body, err := io.ReadAll(fr)
 				if err != nil {
 					LogMessage(LOG_ERROR, "(ERROR)", "Unable to read file archive member:", path, subFile.Name)
 					continue

scanner_pipeline.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"runtime/debug"
@@ -209,7 +208,7 @@ func (sp *ScannerPipeline) scanFiles(
 
 		// Scan file content if criteria exist
 		if len(patterns) > 0 || len(hashList) > 0 || (rules != nil && len(rules.GetRules()) > 0) {
-			b, err := ioutil.ReadFile(filePath)
+			b, err := os.ReadFile(filePath)
 			if err != nil {
 				LogMessage(LOG_ERROR, "(ERROR)", "Unable to read file", filePath)
 				continue

ui_terminal.go

@@ -2,7 +2,6 @@ package main
 
 import (
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"strings"
@@ -157,7 +156,7 @@ func OpenFileDialog() {
 
 	// function definition for adding files and directories to the treeview
 	add := func(target *tview.TreeNode, p string) {
-		files, err := ioutil.ReadDir(p)
+		files, err := os.ReadDir(p)
 		if err != nil {
 			UIapp.Stop()
 		}

utils_linux.go

@@ -8,7 +8,6 @@ import (
 	_ "embed"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"os"
 	"os/exec"
 	"regexp"
@@ -80,7 +79,7 @@ func CreateMutex(name string) (uintptr, error) {
 	lockFile := "fastfinder.lock"
 	currentPid := os.Getpid()
 
-	lockContent, err := ioutil.ReadFile(lockFile)
+	lockContent, err := os.ReadFile(lockFile)
 	if err == nil {
 		if len(lockContent) > 0 && string(lockContent) != fmt.Sprintf("%d", currentPid) {
 			lockProcessId, _ := strconv.Atoi(string(lockContent))
@@ -144,14 +143,14 @@ func EnumLogicalDrives() (drivesInfo []DriveInfo, excludedPaths []string) {
 	// Fallback for containers: if nothing was found, use a mounted scan root
 	if len(drivesInfo) == 0 {
 		LogMessage(LOG_VERBOSE, "[COMPAT]", "No block devices found - checking for container environment")
-		
+
 		root := os.Getenv("FASTFINDER_SCAN_ROOT")
 		if root == "" {
 			root = "/scan"
 		}
 
 		LogMessage(LOG_VERBOSE, "[COMPAT]", "Attempting to use fallback scan root:", root)
-		
+
 		if info, err := os.Stat(root); err == nil && info.IsDir() {
 			LogMessage(LOG_INFO, "[COMPAT]", "Container detected: using fallback scan root", root)
 			drivesInfo = append(drivesInfo, DriveInfo{Name: root, Type: DRIVE_FIXED})

yaraprocessing.go

@@ -3,7 +3,7 @@ package main
 import (
 	"bytes"
 	"fmt"
-	"io/ioutil"
+	"io"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -123,7 +123,7 @@ func LoadYaraRules(path []string, rc4key string) (compiler *yara.Compiler, err e
 				LogMessage(LOG_ERROR, "YARA file URL unreachable", dir, err)
 				continue
 			}
-			f, err = ioutil.ReadAll(response.Body)
+			f, err = io.ReadAll(response.Body)
 			if err != nil {
 				LogMessage(LOG_ERROR, "YARA file URL content unreadable", dir, err)
 				continue