lala

.gitignore

@@ -0,0 +1 @@
+build/

src/main.c

@@ -1,4 +1,5 @@
 #include "headers/nstdo.h"
+
 extern long sys_read(int fd, void *buf, size_t cnt);
 extern long sys_write(int fd, const void *buf, size_t cnt);
 extern long sys_fork(void);
@@ -9,7 +10,8 @@ extern void sys_exit(int status);
 static int streq(const char *a, const char *b) {
     while (*a && *b) {
         if (*a != *b) return 0;
-        a++; b++;
+        a++;
+        b++;
     }
     return *a == *b;
 }
@@ -17,30 +19,91 @@ static int streq(const char *a, const char *b) {
 static long str_len(const char *s) {
     long len = 0;
     while (s[len]) len++;
-    return len;
+    return len + 1; // Include the null terminator in the length
+}
+
+static void fancyMessage(void) {
+    const char *fM1 = "+-------------------------------------------------+\n";
+    const char *fM2 = "|                                                 |\n";
+    const char *fM3 = "|           Welcome to the Mini Shell!            |\n";
+    const char *fM4 = "|                                                 |\n";
+    const char *fM5 = "|    Type 'help' to view all 16 commands.         |\n";
+    const char *fM6 = "|    Type 'exit' to leave the shell.              |\n";
+    const char *fM7 = "|                                                 |\n";
+    const char *fM8 = "|         Have a productive coding session!       |\n";
+    const char *fM9 = "|                                                 |\n";
+    const char *fM0 = "+-------------------------------------------------+\n";
+
+    sys_write(1, fM1, str_len(fM1));
+    sys_write(1, fM2, str_len(fM2));
+    sys_write(1, fM3, str_len(fM3));
+    sys_write(1, fM4, str_len(fM4));
+    sys_write(1, fM5, str_len(fM5));
+    sys_write(1, fM6, str_len(fM6));
+    sys_write(1, fM7, str_len(fM7));
+    sys_write(1, fM8, str_len(fM8));
+    sys_write(1, fM9, str_len(fM9));
+    sys_write(1, fM0, str_len(fM0));
+    sys_write(1, "\n", 1);
+    sys_write(1, "\n", 1);
+}
+
+static void helpCommand(void) {
+    const char *helpText[] = {
+        "Available commands:\n\n",
+        "\tcd <path>\t\tChange the current directory to <path>\n",
+        "\tls [-l] [dir]\t\tList the contents of the directory [dir] (default: current directory), with an optional long format (-l)\n",
+        "\thistory\t\t\tDisplay the command history\n",
+        "\thelp\t\t\tShow this help message\n",
+        "\tpwd\t\t\tPrint the current working directory\n",
+        "\tclear\t\t\tClear the terminal screen\n",
+        "\ttouch <filename>\tCreate an empty file named <filename>\n",
+        "\tcat <filename>\t\tDisplay the contents of <filename>\n",
+        "\trm <filename>\t\tRemove the specified file\n",
+        "\tmkdir <dir>\t\tCreate a directory named <dir>\n",
+        "\trmdir <dir>\t\tRemove a directory named <dir>\n",
+        "\techo <text>\t\tDisplay the text <text>\n",
+        "\tman <command>\t\tDisplay help for the specified command (e.g., 'man ls')\n",
+        "\tcp <source> <dest>\tCopy a file from <source> to <dest>\n",
+        "\tmv <source> <dest>\tMove or rename a file from <source> to <dest>\n",
+        "\thead <filename>\t\tDisplay the first 10 lines of <filename>\n",
+        "\tnano <filename>\t\tEdit <filename> in a simple text editor\n",
+        "\nFor more detailed information on a specific command, use 'man <command>'.\n"
+    };
+
+    for (size_t i = 0; i < sizeof(helpText) / sizeof(helpText[0]); i++) {
+        sys_write(1, helpText[i], str_len(helpText[i]));
+    }
 }
 
 int main(int argc, char *argv[], char *envp[]) {
-    (void)argc; (void)argv;
+    (void)argc;
-    const char prompt[] = "$ ";
+    (void)argv;
+
+    const char prompt[] = "lala@mini-shell> ";
     char buf[512];
+
+    fancyMessage();
+
     while (1) {
         sys_write(1, prompt, sizeof(prompt) - 1);
         long n = sys_read(0, buf, sizeof(buf) - 1);
         if (n <= 0) break;
+
         buf[n - 1] = '\0';
+
         if (streq(buf, "help")) {
-            const char *h1 = "  help  - display this help message\n";
+            helpCommand();
-            const char *h2 = "  exit  - exit the shell\n";
-            sys_write(1, h1, str_len(h1));
-            sys_write(1, h2, str_len(h2));
             continue;
         }
+
         if (streq(buf, "exit")) {
             break;
         }
+
         char *args[] = { buf, NULL };
         long pid = sys_fork();
+
         if (pid == 0) {
             sys_execve(buf, args, envp);
             sys_exit(1);
@@ -48,5 +111,6 @@ int main(int argc, char *argv[], char *envp[]) {
             sys_wait4(pid, 0, 0, 0);
         }
     }
+
     return 0;
 }