diff --git a/src/handlers/mod.rs b/src/handlers/mod.rs
index eee5802..dc636b9 100644
--- a/src/handlers/mod.rs
+++ b/src/handlers/mod.rs
@@ -15,49 +15,49 @@ mod operations;
 mod utils;
 
 fn file_iteration_handler(environment: &Environment,
-                          operation: &dyn FileOperation<Context=FileOperationContext>) {
+                          operation: &dyn FileOperation<Context=FileOperationContext>) -> Result<(), String> {
     iterate_files(environment.current_dir(),
                   &FileOperationContext::create(environment),
                   operation)
 }
 
 pub fn check(environment: &Environment,
-             logger: &Logger) {
+             logger: &Logger) -> Result<(), String> {
     file_iteration_handler(environment,
                            &LoggedOperation::wrap(logger,
                                                   &CheckFileOperation {}))
 }
 
 pub fn link(environment: &Environment,
-            logger: &Logger) {
+            logger: &Logger) -> Result<(), String> {
     file_iteration_handler(environment,
                            &LoggedOperation::wrap(logger,
                                                   &LinkFileOperation {}))
 }
 
 pub fn unlink(environment: &Environment,
-              logger: &Logger) {
+              logger: &Logger) -> Result<(), String> {
     file_iteration_handler(environment,
                            &LoggedOperation::wrap(logger,
                                                   &UnlinkFileOperation {}))
 }
 
 pub fn list(environment: &Environment,
-            logger: &Logger) {
+            logger: &Logger) -> Result<(), String> {
     file_iteration_handler(environment,
                            &LoggedOperation::wrap(logger,
                                                   &ListFileOperation {}))
 }
 
 pub fn list_backup(environment: &Environment,
-                   logger: &Logger) {
+                   logger: &Logger) -> Result<(), String> {
     file_iteration_handler(environment,
                            &LoggedOperation::wrap(logger,
                                                   &ListBackupOperation {}))
 }
 
 pub fn remove_backup(environment: &Environment,
-                     logger: &Logger) {
+                     logger: &Logger) -> Result<(), String> {
     file_iteration_handler(environment,
                            &LoggedOperation::wrap(logger,
                                                   &RemoveBackupOperation {}))
diff --git a/src/handlers/operations/link_operation.rs b/src/handlers/operations/link_operation.rs
index 4ae148f..8656b4a 100644
--- a/src/handlers/operations/link_operation.rs
+++ b/src/handlers/operations/link_operation.rs
@@ -62,9 +62,7 @@ impl FileOperation for LinkFileOperation {
                 .map_err(|e| e.to_string())?;
         }
         match symlink::symlink_file(repository_file_path, &home_file_path) {
-            Ok(_) => {
-                Ok(())
-            }
+            Ok(_) => Ok(()),
             Err(e) => {
                 match backup_file_result {
                     None => {}
diff --git a/src/handlers/utils/file_operation.rs b/src/handlers/utils/file_operation.rs
index 35b2431..6cfe36a 100644
--- a/src/handlers/utils/file_operation.rs
+++ b/src/handlers/utils/file_operation.rs
@@ -11,13 +11,18 @@ pub trait FileOperation {
 pub fn iterate_files<TContext>(root: &PathBuf,
                                context: &TContext,
                                file_operation: &dyn FileOperation<Context=TContext>,
-) {
-    for entry in WalkDir::new(root)
+) -> Result<(), String> {
+    WalkDir::new(root)
         .sort_by(|a, b| a.file_name().cmp(b.file_name()))
         .into_iter()
         .filter(|entry| entry.is_ok())
         .map(|entry| entry.unwrap())
-        .filter(|entry| !entry.file_type().is_dir()) {
-        let _ = file_operation.call(context, &entry);
-    }
+        .filter(|entry| !entry.file_type().is_dir())
+        .fold(Ok(()), |result, entry| {
+            let operation_result = file_operation.call(context, &entry);
+            match operation_result {
+                Ok(_) => result,
+                Err(_) => operation_result
+            }
+        })
 }
\ No newline at end of file
diff --git a/src/handlers/utils/logged_operation.rs b/src/handlers/utils/logged_operation.rs
index 76c226d..ca8f4d7 100644
--- a/src/handlers/utils/logged_operation.rs
+++ b/src/handlers/utils/logged_operation.rs
@@ -19,13 +19,13 @@ impl FileOperation for LoggedOperation<'_, FileOperationContext> {
             self.logger.log(LogLevel::Error,
                             &format!("{} - {}",
                                      entry_path_str,
-                                     result.unwrap_err()))
+                                     result.as_ref().unwrap_err()))
         } else {
             self.logger.log(LogLevel::Info,
                             &format!("{}",
                                      entry_path_str))
         }
-        Ok(())
+        result
     }
 }
 
diff --git a/src/main.rs b/src/main.rs
index c2f5088..e0bc0b9 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,6 @@
 use crate::cli_arguments::{BackupSubcommand};
 use crate::cli_arguments::Command::{Backup, Link, List, Unlink, Check};
+use std::process::exit;
 
 mod environment;
 mod cli_arguments;
@@ -11,7 +12,7 @@ fn main() {
     let cli_arguments = cli_arguments::arguments();
     let logger = log::create(cli_arguments.verbose());
 
-    match cli_arguments.command() {
+    let result = match cli_arguments.command() {
         Link(_) => handlers::link(&environment, &logger),
         Unlink(_) => handlers::unlink(&environment, &logger),
         List(_) => handlers::list(&environment, &logger),
@@ -24,5 +25,6 @@ fn main() {
             }
         }
         Check(_) => handlers::check(&environment, &logger),
-    }
+    };
+    exit(result.map_or(1, |_| 0));
 }