forked from MarcoBuster/Magisk
142 lines
3.1 KiB
C
142 lines
3.1 KiB
C
#include "magiskboot.h"
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char *SUP_LIST[] = { "gzip", "xz", "lzma", "bzip2", "lz4", "lz4_legacy", NULL };
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char *SUP_EXT_LIST[] = { "gz", "xz", "lzma", "bz2", "lz4", "lz4", NULL };
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file_t SUP_TYPE_LIST[] = { GZIP, XZ, LZMA, BZIP2, LZ4, LZ4_LEGACY, 0 };
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void mmap_ro(const char *filename, void **buf, size_t *size) {
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int fd = xopen(filename, O_RDONLY);
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*size = lseek(fd, 0, SEEK_END);
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lseek(fd, 0, SEEK_SET);
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*buf = xmmap(NULL, *size, PROT_READ, MAP_SHARED, fd, 0);
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close(fd);
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}
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void mmap_rw(const char *filename, void **buf, size_t *size) {
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int fd = xopen(filename, O_RDWR);
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*size = lseek(fd, 0, SEEK_END);
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lseek(fd, 0, SEEK_SET);
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*buf = xmmap(NULL, *size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
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close(fd);
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}
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file_t check_type(const void *buf) {
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if (memcmp(buf, CHROMEOS_MAGIC, 8) == 0) {
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return CHROMEOS;
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} else if (memcmp(buf, BOOT_MAGIC, BOOT_MAGIC_SIZE) == 0) {
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return AOSP;
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} else if (memcmp(buf, ELF32_MAGIC, 5) == 0) {
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return ELF32;
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} else if (memcmp(buf, ELF64_MAGIC, 5) == 0) {
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return ELF64;
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} else if (memcmp(buf, GZIP_MAGIC, 4) == 0) {
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return GZIP;
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} else if (memcmp(buf, LZOP_MAGIC, 9) == 0) {
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return LZOP;
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} else if (memcmp(buf, XZ_MAGIC, 6) == 0) {
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return XZ;
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} else if (memcmp(buf, "\x5d\x00\x00", 3) == 0
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&& (((char *)buf)[12] == '\xff' || ((char *)buf)[12] == '\x00')) {
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return LZMA;
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} else if (memcmp(buf, BZIP_MAGIC, 3) == 0) {
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return BZIP2;
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} else if (memcmp(buf, LZ4_MAGIC, 4) == 0) {
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return LZ4;
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} else if (memcmp(buf, LZ4_LEG_MAGIC, 4) == 0) {
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return LZ4_LEGACY;
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} else if (memcmp(buf, MTK_MAGIC, 4) == 0) {
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return MTK;
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} else if (memcmp(buf, DTB_MAGIC, 4) == 0) {
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return DTB;
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} else {
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return UNKNOWN;
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}
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}
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void get_type_name(file_t type, char *name) {
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char *s;
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switch (type) {
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case CHROMEOS:
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s = "chromeos";
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break;
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case AOSP:
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s = "aosp";
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break;
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case GZIP:
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s = "gzip";
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break;
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case LZOP:
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s = "lzop";
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break;
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case XZ:
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s = "xz";
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break;
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case LZMA:
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s = "lzma";
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break;
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case BZIP2:
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s = "bzip2";
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break;
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case LZ4:
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s = "lz4";
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break;
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case LZ4_LEGACY:
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s = "lz4_legacy";
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break;
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case MTK:
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s = "mtk";
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break;
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case DTB:
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s = "dtb";
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break;
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default:
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s = "raw";
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}
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strcpy(name, s);
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}
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void write_zero(int fd, size_t size) {
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size_t pos = lseek(fd, 0, SEEK_CUR);
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ftruncate(fd, pos + size);
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lseek(fd, pos + size, SEEK_SET);
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}
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void mem_align(size_t *pos, size_t align) {
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size_t mask = align - 1;
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if (*pos & mask) {
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*pos += align - (*pos & mask);
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}
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}
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void file_align(int fd, size_t align, int out) {
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size_t pos = lseek(fd, 0, SEEK_CUR);
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size_t mask = align - 1;
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size_t off;
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if (pos & mask) {
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off = align - (pos & mask);
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if (out) {
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write_zero(fd, off);
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} else {
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lseek(fd, pos + off, SEEK_SET);
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}
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}
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}
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int open_new(const char *filename) {
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return xopen(filename, O_WRONLY | O_CREAT | O_TRUNC, 0644);
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}
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void cleanup() {
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fprintf(stderr, "Cleaning up...\n");
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char name[PATH_MAX];
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unlink(KERNEL_FILE);
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unlink(RAMDISK_FILE);
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unlink(RAMDISK_FILE ".unsupport");
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unlink(SECOND_FILE);
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unlink(DTB_FILE);
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for (int i = 0; SUP_EXT_LIST[i]; ++i) {
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sprintf(name, "%s.%s", RAMDISK_FILE, SUP_EXT_LIST[i]);
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unlink(name);
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}
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}
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