Add basic cpio features

jni/magiskboot/cpio.h

@@ -0,0 +1,42 @@
+#ifndef _CPIO_H_
+#define _CPIO_H_
+
+#include <stdint.h>
+
+typedef struct cpio_file {
+	// uint32_t ino;
+	uint32_t mode;
+	uint32_t uid;
+	uint32_t gid;
+	// uint32_t nlink;
+	// uint32_t mtime;
+	uint32_t filesize;
+	// uint32_t devmajor;
+	// uint32_t devminor;
+	// uint32_t rdevmajor;
+	// uint32_t rdevminor;
+	uint32_t namesize;
+	// uint32_t check;
+	char *filename;
+	void *data;
+	int remove;
+} cpio_file;
+
+typedef struct cpio_newc_header {
+	char magic[6];
+	char ino[8];
+	char mode[8];
+	char uid[8];
+	char gid[8];
+	char nlink[8];
+	char mtime[8];
+	char filesize[8];
+	char devmajor[8];
+	char devminor[8];
+	char rdevmajor[8];
+	char rdevminor[8];
+	char namesize[8];
+	char check[8];
+} cpio_newc_header;
+
+#endif