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 <logging.h>
#include <utils.h>
#include <flags.h>
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#include "magiskboot.h"
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#include "compress.h"
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static void usage(char *arg0) {
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fprintf(stderr,
FULL_VER(MagiskBoot) " - Boot Image Modification Tool\n"
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"Usage: %s <action> [args...]\n"
"\n"
"Supported actions:\n"
" unpack <bootimg>\n"
" Unpack <bootimg> to, if available, kernel, ramdisk.cpio, \n"
" second, dtb, extra, and recovery_dtbo into current directory.\n"
" Return values:\n"
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" 0:valid 1:error 2:chromeos 3:ELF32 4:ELF64\n"
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"\n"
" repack <origbootimg> [outbootimg]\n"
" Repack boot image components from current directory\n"
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" to [outbootimg], or new-boot.img if not specified.\n"
" It will compress ramdisk.cpio and kernel with the same method in\n"
" <origbootimg> if the file provided is not already compressed.\n"
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"\n"
" hexpatch <file> <hexpattern1> <hexpattern2>\n"
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" Search <hexpattern1> in <file>, and replace with <hexpattern2>\n"
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"\n"
" cpio <incpio> [commands...]\n"
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" 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"
" dtb-<cmd> <dtb>\n"
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" 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"
" compress[=method] <infile> [outfile]\n"
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" 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);
for (auto &it : name2fmt)
fprintf(stderr, "%s ", it.first.data());
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fprintf(stderr,
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"\n\n"
" decompress <infile> [outfile]\n"
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" Detect method and decompress <infile>, optionally to [outfile]\n"
" <infile>/[outfile] can be '-' to be STDIN/STDOUT\n"
" Supported methods: ");
for (auto &it : name2fmt)
fprintf(stderr, "%s ", it.first.data());
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fprintf(stderr,
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"\n\n"
" sha1 <file>\n"
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" Print the SHA1 checksum for <file>\n"
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"\n"
" cleanup\n"
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" 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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umask(0);
if (argc < 2)
usage(argv[0]);
// Skip '--' for backwards compatibility
if (strncmp(argv[1], "--", 2) == 0)
argv[1] += 2;
if (strcmp(argv[1], "cleanup") == 0) {
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fprintf(stderr, "Cleaning up...\n");
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unlink(KERNEL_FILE);
unlink(RAMDISK_FILE);
unlink(SECOND_FILE);
unlink(DTB_FILE);
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unlink(EXTRA_FILE);
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unlink(RECV_DTBO_FILE);
} 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);
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SHA_hash(buf, size, sha1);
for (uint8_t i : sha1)
printf("%02x", i);
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printf("\n");
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munmap(buf, size);
} else if (argc > 2 && strcmp(argv[1], "unpack") == 0) {
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return unpack(argv[2]);
} else if (argc > 2 && strcmp(argv[1], "repack") == 0) {
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repack(argv[2], argv[3] ? argv[3] : NEW_BOOT);
} else if (argc > 2 && strcmp(argv[1], "decompress") == 0) {
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decompress(argv[2], argv[3]);
} else if (argc > 2 && strncmp(argv[1], "compress", 10) == 0) {
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compress(argv[1][10] == '=' ? &argv[1][11] : "gzip", argv[2], argv[3]);
} else if (argc > 4 && strcmp(argv[1], "hexpatch") == 0) {
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hexpatch(argv[2], argv[3], argv[4]);
} else if (argc > 2 && strcmp(argv[1], "cpio") == 0) {
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if (cpio_commands(argc - 2, argv + 2)) usage(argv[0]);
} else if (argc > 2 && strncmp(argv[1], "dtb", 5) == 0) {
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if (argv[1][5] != '-')
usage(argv[0]);
if (dtb_commands(&argv[1][6], argc - 2, argv + 2))
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usage(argv[0]);
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} else {
usage(argv[0]);
}
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return 0;
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}