include/fs/initfs.h

@@ -13,5 +13,6 @@ int initfs_init(struct limine_file* tar_file);
 int tar_lookup(unsigned char* archive, char* filename, char** out);
 int tar_exists(const char* filename);
 int tar_read(char* filename, char* out, int count, int offset);
+void tar_list();
 
 #endif

src/fs/initfs.c

@@ -59,6 +59,22 @@ int tar_lookup(unsigned char* archive, char* filename, char** out)
     return -ENOENT;
 }
 
+/*
+ * tar_list - list all files present in archive
+ */
+void tar_list()
+{
+    printf("++ Contents of initial filesystem ++\r\n\r\n");
+    unsigned char *ptr = archive_start_addr;
+
+    while (!memcmp(ptr + 257, "ustar", 5)) {
+        int filesize = tar_oct2bin(ptr + 0x7c, 11);
+        char* filename = (char*)ptr;
+        printf("file: %s\r\n", filename);
+        ptr += (((filesize + 511) / 512) + 1) * 512;
+    }
+}
+
 /*
  * tar_read - read a file in the TAR archive
  * @filename: file to read (absolute path)

src/kapps/kshell.c

@@ -4,6 +4,7 @@
  * @license GPL-3.0-only
  */
 
+#include "fs/initfs.h"
 #include <io/term/term.h>
 #include <config.h>
 #include <io/kbd/ps2.h>
@@ -42,17 +43,16 @@ void pedicel_main(void* arg)
         keyboard_getline(input_buf, PEDICEL_INPUT_SIZE);
         
         if (strncmp(input_buf, "help", 4) == 0) {
-            printf("\r\nYou are currently running the test kernel shell. This is not\r\n"
-                        "a fully-fledged shell like you'd find in a complete operating system,\r\n"
-                        "but rather a toy to play around in the meantime.\r\n\r\n"
-                            "clear   - clear the screen\r\n"
-                            "panic   - trigger a test panic\r\n"
-                            "syscall - trigger int 0x80\r\n"
-                            "pf      - trigger a page fault\r\n"
-                            "now     - get current date\r\n"
-                            "smash   - smash the stack\r\n"
-                            "mem     - get used heap info\r\n"
-                            "load    - load an user executable\r\n");
+            printf("++ shell builtins ++\r\n\r\n"
+                            "\tclear   - clear the screen\r\n"
+                            "\tpanic   - trigger a test panic\r\n"
+                            "\tsyscall - trigger int 0x80\r\n"
+                            "\tpf      - trigger a page fault\r\n"
+                            "\tnow     - get current date\r\n"
+                            "\tsmash   - smash the stack\r\n"
+                            "\tmem     - get used heap info\r\n"
+                            "\tload    - load an user executable\r\n"
+                            "\tlist    - list initfs.tar contents\r\n");
             continue;
         }
 
@@ -102,6 +102,11 @@ void pedicel_main(void* arg)
             continue;
         }
 
+        if (strncmp(input_buf, "list", 4) == 0) {
+            tar_list();
+            continue;
+        }
+
         printf("%s: command not found\r\n", input_buf);
     }
 }