vfs: add follow_path function

Makefile

@@ -52,10 +52,11 @@ image:
 	sudo losetup -D
 
 iso:
-	mkdir tmp
-	mkdir katauos
+	mkdir -p tmp
+	mkdir -p katauos
 	sudo mount rootfs.iso9660 tmp/
-	cp -R tmp/* katauos/
+	sudo cp -R tmp/* katauos/
+	sudo chown -R kali:kali katauos/
 	cp katauos.bin grubshit/boot
 	cp katauos.bin katauos/boot/
 	cp grubshit/boot/grub/grub.cfg katauos/boot/grub/grub.cfg

include/vfs.h

@@ -20,5 +20,6 @@ size_t vfs_read_file_length(l9660_file *file, uint8_t* buffer, size_t length);
 void test_iso9660();
 
 int vsf_read_file_by_path(const char* path, uint8_t** buffer, l9660_dir* dir);
+void follow_path(const char* path, l9660_file* file, l9660_dir* dir);
 
 #endif

src/fs/vfs.c

@@ -221,4 +221,70 @@ int vsf_read_file_by_path(const char* path, uint8_t** buffer, l9660_dir* dir)
     debug_log("bytes read: 0x%X\n", read);
     
     return 0;
+}
+
+void follow_path(const char* path, l9660_file* file, l9660_dir* dir)
+{
+    int pos = 0;
+    int start_from_root = 0;
+    char buf[32];
+    int bufpos = 0;
+
+    int isdir = 0;
+
+    memset(buf, 0, sizeof(buf));
+
+    if (path[pos] == '/')
+    {
+        start_from_root = 1;
+        pos++;
+        l9660_fs_open_root(dir, global_fs);
+        debug_log("start_from_root\n");
+        debug_log("/");
+    }
+
+    //printf("start_from_root: %X\n\n", start_from_root);
+    l9660_status status;
+
+    while(path[pos] != '\0')
+    {
+    	while (path[pos] != '/' && path[pos] != '\0')
+    	{
+        	buf[bufpos] = path[pos];
+        	pos++;
+        	bufpos++;
+    	}
+    	buf[bufpos] = '\0';  // Null-terminate the string
+    	bufpos = 0;
+
+        if(path[pos] != '\0')
+        {
+            isdir = 1;
+            debug_log("%s->", buf);//this is a directory
+            l9660_dir dir2;
+            status = l9660_opendirat(&dir2, dir, buf);
+            if(status != L9660_OK)
+            {
+                debug_log("FUCKFUCKFUCKFUCK BLYAAAT!!!!!\n");
+                return;
+            }
+            *dir = dir2;
+        }
+        else
+        {
+            isdir = 0;
+            debug_log("%s", buf);//this is a file
+            status = l9660_openat(file, dir, buf);
+            if(status != L9660_OK)
+            {
+                debug_log("PIZDAPIZDA BLYAAAT!!!!!\n");
+                return;
+            }
+            return;
+        }
+        pos++;
+    }
+    debug_log("\n");
+    //printf("buf: %s\n", buf);
+    debug_log("isdir: %X\n", isdir);
 }

src/kernel/kernel.c

@@ -131,6 +131,20 @@ void kmain(unsigned int magic, unsigned int info)
 
 	mount_fs();
 
+	l9660_dir* dir = (l9660_dir*)malloc(sizeof(l9660_dir));
+	l9660_file* file = (l9660_file*)malloc(sizeof(l9660_file));
+
+	follow_path("/bin/bash.", file, dir);
+	
+	//////////////
+	l9660_seek(file, L9660_SEEK_END, 0);
+    uint32_t file_size = l9660_tell(file);
+    debug_log("file_size: %X\n", file_size);
+    l9660_seek(file, L9660_SEEK_SET, 0);
+	free(file);
+	free(dir);
+	//////////////
+
 	exec_from_file("caller.", ".");
 
 	while(1)