From 9359850dd1944e0331f42c25d969c6f2770ca9b2 Mon Sep 17 00:00:00 2001
From: nasrlol <nsrddyn@gmail.com>
Date: Mon, 10 Feb 2025 22:03:54 +0100
Subject: worked on an algorithm for the echo function

---
 a.out               | Bin 15720 -> 15816 bytes
 current_directory.c |  37 ++++++++++++++++++++++++
 main.c              |  79 ++++++++++++++++++++++++++++++++++++----------------
 3 files changed, 92 insertions(+), 24 deletions(-)
 create mode 100644 current_directory.c

diff --git a/a.out b/a.out
index eed2891..be27e11 100755
Binary files a/a.out and b/a.out differ
diff --git a/current_directory.c b/current_directory.c
new file mode 100644
index 0000000..a9eec1b
--- /dev/null
+++ b/current_directory.c
@@ -0,0 +1,37 @@
+/*
+ * =====================================================================================
+ *
+ *       Filename:  current_directory.c
+ * 
+ *
+ *        Version:  1.0
+ *        Created:  02/10/2025 10:26:51 AM
+ *       Revision:  none
+ *       Compiler:  gcc
+ *
+ *         Author:  YOUR NAME (), 
+ *   Organization:  
+ *
+ * =====================================================================================
+ */
+
+#include <unistd.h>
+#include <stdio.h>
+#include <linux/limits.h>
+
+int main()
+{
+    char cwd[PATH_MAX];
+    if (getcwd(cwd, sizeof(cwd)) != NULL)
+        printf("%s", cwd);
+    else {
+        perror("getcwd() error");
+        return 1;
+    }
+    return 0;
+}
+
+
+
+
+
diff --git a/main.c b/main.c
index ca375e5..5f370bb 100644
--- a/main.c
+++ b/main.c
@@ -8,13 +8,14 @@
 #include <dirent.h>
 #include <unistd.h>
 #include <stdbool.h>
+#include <linux/limits.h>
 
 #define MAX_HISTORY 100
 #define MAX_COMMAND_LENGTH 256
 
-static int CURRENT_COMMAND_INDEX = 0;
-static int CURRENT_HISTORY_INDEX = 0;
-static char *COMMAND_HISTORY[MAX_HISTORY] = { NULL};
+// static int CURRENT_COMMAND_INDEX = 0;
+// static int CURRENT_HISTORY_INDEX = 0;
+// static char *COMMAND_HISTORY[MAX_HISTORY] = { NULL};
 
 
 void test_print()
@@ -29,48 +30,76 @@ void exit_program()
         exit(0);
 }
 
-// pwd command
-void list_directories()
+// ls command
+void list_current_directories()
 {
-    struct dirent **namelist;
-    int n;
-    n = scandir(".", &namelist, NULL, alphasort);
-    if (n == -1)
-    {
-        perror("scandir");
-        exit(EXIT_FAILURE);
-    }
+    fork();
+
+    DIR *DIRECTORY_STREAM;
+    DIRECTORY_STREAM = opendir(".");
 
-    while (n--)
+    if (DIRECTORY_STREAM == NULL)
     {
-        printf("%s\n", namelist[n]->d_name);
-        free(namelist[n]);
+        perror("ERROR_DIRECTORY_STREAM_EMPTY");
     }
-    free(namelist[n]);
-    exit(EXIT_SUCCESS);
+    else
+        printf("%p", (&DIRECTORY_STREAM));
+    _exit(0); 
+
 }
 
-void print_working_directory()
+char *print_working_directory()
 {
-    char current_working_directory[100];
+    char *current_working_directory = malloc(sizeof(char) * 100);
     
     if(getcwd(current_working_directory, sizeof(current_working_directory) != 0))
     {
-        printf("%s", current_working_directory);
+        return current_working_directory;
     }
     else
     {
         perror("getcwd() error");
+        return "ERROR";
     }
 }
 
 // echo emulation command, without variables
-void echo(char *command, char *argv)
+char *echo(char *command)
 {
-    if (strcmp(command, "echo") == 0)
+    char *argv = (char *)malloc(sizeof(char) * 4);
+    char *command_argument = (char *)malloc(sizeof(char) * 100); 
+
+    int separation_index = 0;
+    for (int i = 0; i < sizeof(command); i++)
+    {
+        if (strcmp(&command[i], " ") == 0)
+        {
+            separation_index = i;
+
+            for ( int j = 0; j < separation_index; j++)
+            {
+                argv = &command[j];
+            }
+        }
+    }
+    if (strcmp(argv, "echo") == 0)
     {
-        printf("argv");
+        
+        for (int i = separation_index + 1; i < (sizeof(command) - separation_index); i++)  
+        {
+             if(strcmp(&command[i], "\0") != 0)
+             {
+                 break;
+             }
+             else
+             {
+                 strcpy(&command_argument[i - (separation_index - 1)], &command[i]);
+             }
+        }
     }
+    
+    return command_argument;
+
 }
 
 
@@ -107,6 +136,8 @@ int main(void)
             print_working_directory();
         else if(strcmp(input, "test") == 0)
             test_print();
+        else if(strcmp(input,"ls") == 0)
+            list_current_directories();
     }
 
     return 0;
-- 
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