Magisk/native/jni/magiskboot/main.cpp

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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
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#include <mincrypt/sha.h>
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#include "magiskboot.h"
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#include "logging.h"
#include "utils.h"
#include "flags.h"
/********************
Patch Boot Image
*********************/
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static void usage(char *arg0) {
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fprintf(stderr,
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"Usage: %s <action> [args...]\n"
"\n"
"Supported actions:\n"
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" --unpack <bootimg>\n"
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" Unpack <bootimg> to kernel, ramdisk.cpio, and if available, second, dtb,\n"
" and extra into the current directory. Return values:\n"
" 0:valid 1:error 2:chromeos 3:ELF32 4:ELF64\n"
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"\n"
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" --repack <origbootimg> [outbootimg]\n"
" Repack kernel, ramdisk.cpio[.ext], second, dtb... from current directory\n"
" to [outbootimg], or new-boot.img if not specified.\n"
" It will compress ramdisk.cpio with the same method used in <origbootimg>,\n"
" or attempt to find ramdisk.cpio.[ext], and repack directly with the\n"
" compressed ramdisk file\n"
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"\n"
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" --hexpatch <file> <hexpattern1> <hexpattern2>\n"
" Search <hexpattern1> in <file>, and replace with <hexpattern2>\n"
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"\n"
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" --cpio <incpio> [commands...]\n"
" Do cpio commands to <incpio> (modifications are done directly)\n"
" Each command is a single argument, use quotes if necessary\n"
" Supported commands:\n"
" exists ENTRY\n"
" Return 0 if ENTRY exists, else return 1\n"
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" rm [-r] ENTRY\n"
" Remove ENTRY, specify [-r] to remove recursively\n"
" mkdir MODE ENTRY\n"
" Create directory ENTRY in permissions MODE\n"
" ln TARGET ENTRY\n"
" Create a symlink to TARGET with the name ENTRY\n"
" mv SOURCE DEST\n"
" Move SOURCE to DEST\n"
" add MODE ENTRY INFILE\n"
" Add INFILE as ENTRY in permissions MODE; replaces ENTRY if exists\n"
" extract [ENTRY OUT]\n"
" Extract ENTRY to OUT, or extract all entries to current directory\n"
" test\n"
" Test the current cpio's patch status\n"
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" Return values:\n"
" 0:stock 1:Magisk 2:unsupported (phh, SuperSU, Xposed)\n"
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" patch KEEPVERITY KEEPFORCEENCRYPT\n"
" Ramdisk patches. KEEP**** are boolean values\n"
" backup ORIG\n"
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" Create ramdisk backups from ORIG\n"
" restore\n"
" Restore ramdisk from ramdisk backup stored within incpio\n"
" sha1\n"
" Print stock boot SHA1 if previously backed up in ramdisk\n"
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"\n"
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" --dtb-<cmd> <dtb>\n"
" Do dtb related cmds to <dtb> (modifications are done directly)\n"
" Supported commands:\n"
" dump\n"
" Dump all contents from dtb for debugging\n"
" test\n"
" Check if fstab has verity/avb flags\n"
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" Return values:\n"
" 0:no flags 1:flag exists\n"
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" patch\n"
" Search for fstab and remove verity/avb\n"
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"\n"
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" --compress[=method] <infile> [outfile]\n"
" Compress <infile> with [method] (default: gzip), optionally to [outfile]\n"
" <infile>/[outfile] can be '-' to be STDIN/STDOUT\n"
" Supported methods: "
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, arg0);
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for (int i = 0; SUP_LIST[i]; ++i)
fprintf(stderr, "%s ", SUP_LIST[i]);
fprintf(stderr,
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"\n\n"
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" --decompress <infile> [outfile]\n"
" Detect method and decompress <infile>, optionally to [outfile]\n"
" <infile>/[outfile] can be '-' to be STDIN/STDOUT\n"
" Supported methods: ");
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for (int i = 0; SUP_LIST[i]; ++i)
fprintf(stderr, "%s ", SUP_LIST[i]);
fprintf(stderr,
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"\n\n"
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" --sha1 <file>\n"
" Print the SHA1 checksum for <file>\n"
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"\n"
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" --cleanup\n"
" Cleanup the current working directory\n"
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"\n");
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exit(1);
}
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int main(int argc, char *argv[]) {
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cmdline_logging();
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fprintf(stderr, "MagiskBoot v" xstr(MAGISK_VERSION) "(" xstr(MAGISK_VER_CODE) ") (by topjohnwu) - Boot Image Modification Tool\n");
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umask(0);
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if (argc > 1 && strcmp(argv[1], "--cleanup") == 0) {
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fprintf(stderr, "Cleaning up...\n");
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char name[PATH_MAX];
unlink(KERNEL_FILE);
unlink(RAMDISK_FILE);
unlink(RAMDISK_FILE ".raw");
unlink(SECOND_FILE);
unlink(DTB_FILE);
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unlink(EXTRA_FILE);
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unlink(RECV_DTBO_FILE);
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for (int i = 0; SUP_EXT_LIST[i]; ++i) {
sprintf(name, "%s.%s", RAMDISK_FILE, SUP_EXT_LIST[i]);
unlink(name);
}
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} else if (argc > 2 && strcmp(argv[1], "--sha1") == 0) {
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uint8_t sha1[SHA_DIGEST_SIZE];
void *buf;
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size_t size;
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mmap_ro(argv[2], &buf, &size);
SHA_hash(buf, size, sha1);
for (int i = 0; i < SHA_DIGEST_SIZE; ++i)
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printf("%02x", sha1[i]);
printf("\n");
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munmap(buf, size);
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} else if (argc > 2 && strcmp(argv[1], "--unpack") == 0) {
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return unpack(argv[2]);
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} else if (argc > 2 && strcmp(argv[1], "--repack") == 0) {
repack(argv[2], argc > 3 ? argv[3] : NEW_BOOT);
} else if (argc > 2 && strcmp(argv[1], "--decompress") == 0) {
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decompress(argv[2], argc > 3 ? argv[3] : NULL);
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} else if (argc > 2 && strncmp(argv[1], "--compress", 10) == 0) {
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const char *method;
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method = strchr(argv[1], '=');
if (method == NULL) method = "gzip";
else method++;
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compress(method, argv[2], argc > 3 ? argv[3] : NULL);
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} else if (argc > 4 && strcmp(argv[1], "--hexpatch") == 0) {
hexpatch(argv[2], argv[3], argv[4]);
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} else if (argc > 2 && strcmp(argv[1], "--cpio") == 0) {
if (cpio_commands(argc - 2, argv + 2)) usage(argv[0]);
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} else if (argc > 2 && strncmp(argv[1], "--dtb", 5) == 0) {
char *cmd = argv[1] + 5;
if (*cmd == '\0') usage(argv[0]);
else ++cmd;
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if (dtb_commands(cmd, argc - 2, argv + 2))
usage(argv[0]);
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} else {
usage(argv[0]);
}
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return 0;
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}