Added prototype of argument handling

3 files changed, 88 insertions, 28 deletions

diff --git a/fileutil b/fileutil
deleted file mode 100755
index 0cab2a8..0000000
--- a/fileutil
+++ /dev/null
diff --git a/fileutil.c b/fileutil.c
index f530dfa..c0fc7a8 100644
--- a/fileutil.c
+++ b/fileutil.c
@@ -4,7 +4,7 @@
  *  Alexander Occhipinti
  * Student ID: 29994705
  * Created: 3 Sep 2020
- * Last Modified: 4 Sep 2020
+ * Last Modified: 7 Sep 2020
  * 
  * fileutil is a program which is a utility for files. It combines the functionality of cat cp and mv.
  * This program allows you to copy the contents of a given file to stdout or to a another file.
@@ -15,11 +15,10 @@
 #include <unistd.h>
 #include <sys/file.h>
 #include <stdlib.h>
+#include <stdio.h>
 #include <string.h>
 #include "fileutil.h"
-#define FILE_BUF_SIZE 1024
-#define DEFAULT_READ_PATH "logfile.txt"
-#define NEW_FILE_PERMS 0664
+
 
 /*
  * Prints a given string to stdout. Returns nothing.
@@ -67,10 +66,10 @@ void print_file(char *read_path) {
     close(read_fd);
 }
 
-void copy_file(char *read_path, char *write_path, int overwrite) {
+void copy_file(char *read_path, char *write_path, bool overwrite) {
     int read_fd, write_fd;
     int write_flags = O_WRONLY | O_CREAT;
-    if (overwrite) write_flags |= O_EXCL;
+    if (!overwrite) write_flags |= O_EXCL;
 
     read_fd = open_file(read_path, O_RDONLY);
     write_fd = open_file(write_path, write_flags);
@@ -88,6 +87,39 @@ char* get_filename(char *full_path){
 
 }
 
+arguments_t parse_arguments(int argc, char **argv){
+    arguments_t args = {
+        .src_path_index = 1,
+        .dir_path_index = -1,
+        .valid = false,
+        .move_flag = false,
+        .force_flag = false,
+        .dir_flag = false
+    };
+
+    for (int i = 2; i < argc; i++) {
+        if (strcmp(argv[i], "-d") == 0) {
+            args.dir_flag = true;
+            args.dir_path_index = i+1;
+        } else if (strcmp(argv[i], "-M") == 0) {
+            args.move_flag = true;
+        } else if (strcmp(argv[i], "-F") == 0) {
+            args.force_flag = true;
+        }
+    }
+
+    bool correct_flags = (args.move_flag || args.force_flag) ? args.dir_flag : true;
+
+    args.valid =
+    correct_flags &&
+    (args.dir_path_index < argc) &&
+    (argc >= MIN_NUM_OF_ARGS) &&
+    (argc <= MAX_NUM_OF_ARGS);
+
+    return args;
+}
+
+
 void copy_into_dir(char *file_path, char *dir_path){
     char* filename;
     char* new_path;
@@ -103,33 +135,45 @@ void copy_into_dir(char *file_path, char *dir_path){
     strcat(new_path, "/");
     strcat(new_path, filename);
     copy_file(file_path, new_path, 0);
+    to_stdout("Copy successful\n");
 
     free(new_path);
 }
 
 
 
+
 int main(int argc, char *argv[]) {
-    switch (argc){
-        case 0:
-            exit(1);
-        case 1:
-            print_file(DEFAULT_READ_PATH);
-            break;
-        case 2:
-            print_file(argv[1]);
-            break;
-        case 3:
-            to_stderr("Invalid number of arguments sepcified\n");
-            exit(1);
-            break;
-        default:
-            if (strcmp(argv[2], "-d") == 0){
-                copy_into_dir(argv[1], argv[3]);
-            } else {
-                to_stderr("Invalid argument(s) sepcified\n");
-                exit(1);
-            }
+    // switch (argc){
+    //     case 0:
+    //         exit(1);
+    //     case 1:
+    //         print_file(DEFAULT_READ_PATH);
+    //         break;
+    //     case 2:
+    //         print_file(argv[1]);
+    //         break;
+    //     case 3:
+    //         to_stderr("Invalid number of arguments sepcified\n");
+    //         exit(1);
+    //         break;
+    //     default:
+    //         if (strcmp(argv[2], "-d") == 0){
+    //             copy_into_dir(argv[1], argv[3]);
+    //         } else {
+    //             to_stderr("Invalid argument(s) sepcified\n");
+    //             exit(1);
+    //         }
+    // }
+
+    arguments_t args = parse_arguments(argc, argv);
+    if (!args.valid) {
+        to_stderr("nah");
+        return -1;
+    } else {
+        to_stdout("yeah");
+        return 0;
     }
-    return 0;
+
+    // return 0;
 }
diff --git a/fileutil.h b/fileutil.h
index 138f01d..676d3f0 100644
--- a/fileutil.h
+++ b/fileutil.h
@@ -1,12 +1,28 @@
 #ifndef _FILEUTIL_H
 #define _FILEUTIL_H
 
+#define FILE_BUF_SIZE 1024
+#define DEFAULT_READ_PATH "logfile.txt"
+#define NEW_FILE_PERMS 0664
+#define MIN_NUM_OF_ARGS 1
+#define MAX_NUM_OF_ARGS 6
+
+typedef enum {false, true} bool;
+typedef struct arguments_t {
+    bool valid;
+    bool move_flag;
+    bool force_flag;
+    bool dir_flag;
+    int src_path_index;
+    int dir_path_index;
+} arguments_t;
+
 void to_stdout(char *string);
 void to_stderr(char *string);
 int open_file(char *path, int flags);
 void file_into_file(int source_fd, int dest_fd);
 void print_file(char *read_path);
-void copy_file(char *read_path, char *write_path, int overwrite);
+void copy_file(char *read_path, char *write_path, bool overwrite);
 char* get_filename(char *full_path);
 void copy_into_dir(char *file_path, char *dir_path);
 int main(int argc, char *argv[]);