Add cpio ramdisk bare bones

README.md

@@ -43,6 +43,7 @@ make run
 
 - `boot/`: Конфигурация GRUB.
 - `kernel/`: Основной код ядра.
+- `initrd/`: Файлы виртуального диска.
 - `scripts/`: Скрипты для сборки и запуска.
 
 ## XD

initrd/Wellcome.txt

@@ -0,0 +1 @@
+:D

kernel/cpio.c

@@ -0,0 +1,75 @@
+#include <kstdint.h>
+
+// We need memory manager and kernel lib first
+#if 0
+typedef struct {
+    char c_magic[6];    // "070701"
+    char c_ino[8];
+    char c_mode[8];
+    char c_uid[8];
+    char c_gid[8];
+    char c_nlink[8];
+    char c_mtime[8];
+    char c_filesize[8];
+    char c_devmajor[8];
+    char c_devminor[8];
+    char c_rdevmajor[8];
+    char c_rdevminor[8];
+    char c_namesize[8];
+    char c_check[8];
+} cpio_header_t;
+
+void cpio_from_memory(const char *cpio, uint64_t len) {
+    const char *ptr = cpio;
+    const char *end = cpio + len;
+
+    while (ptr + sizeof(cpio_header_t) <= end) {
+        const cpio_header_t *hdr = (const cpio_header_t *)ptr;
+
+        if (memcmp(hdr->c_magic, "070701", 6) != 0) {
+            if (memcmp(hdr->c_magic, "000000", 6) == 0) {
+                printf("End of archive reached.\n");
+                break;
+            } else {
+                printf("Invalid cpio magic number.\n");
+                return;
+            }
+        }
+
+        uint64_t namesize = strtoul(hdr->c_namesize, NULL, 16);
+        uint64_t filesize = strtoul(hdr->c_filesize, NULL, 16);
+
+        uint64_t name_padding = (namesize + 3) & ~3;
+        ptr += sizeof(cpio_header_t);
+
+        if (ptr + namesize > end) {
+            printf("Error: Not enough data for file name.\n");
+            return;
+        }
+        char *name = malloc(namesize + 1);
+        if (!name) {
+            printf("Memory allocation failed.\n");
+            return;
+        }
+        memcpy(name, ptr, namesize);
+        name[namesize] = '\0';
+        printf("File name: %s\n", name);
+        free(name);
+
+        ptr += name_padding;
+
+        if (ptr + filesize > end) {
+            printf("Error: Not enough data for file content.\n");
+            return;
+        }
+        printf("File size: %llu bytes\n", filesize);
+
+        ptr += (filesize + 3) & ~3;
+
+        if (ptr > end) {
+            printf("Error: Overran buffer.\n");
+            return;
+        }
+    }
+}
+#endif