Refactor magiskboot cpio

This commit is contained in:
LoveSy 2023-06-09 21:43:26 +08:00 committed by John Wu
parent c1038ac6f9
commit b8cb9cd84d
13 changed files with 881 additions and 567 deletions

View File

@ -116,9 +116,7 @@ LOCAL_SRC_FILES := \
boot/compress.cpp \ boot/compress.cpp \
boot/format.cpp \ boot/format.cpp \
boot/dtb.cpp \ boot/dtb.cpp \
boot/ramdisk.cpp \
boot/pattern.cpp \ boot/pattern.cpp \
boot/cpio.cpp \
boot/boot-rs.cpp boot/boot-rs.cpp
include $(BUILD_EXECUTABLE) include $(BUILD_EXECUTABLE)

135
native/src/Cargo.lock generated
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@ -11,6 +11,55 @@ dependencies = [
"memchr", "memchr",
] ]
[[package]]
name = "anstream"
version = "0.3.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0ca84f3628370c59db74ee214b3263d58f9aadd9b4fe7e711fd87dc452b7f163"
dependencies = [
"anstyle",
"anstyle-parse",
"anstyle-query",
"anstyle-wincon",
"colorchoice",
"is-terminal",
"utf8parse",
]
[[package]]
name = "anstyle"
version = "1.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "41ed9a86bf92ae6580e0a31281f65a1b1d867c0cc68d5346e2ae128dddfa6a7d"
[[package]]
name = "anstyle-parse"
version = "0.2.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "e765fd216e48e067936442276d1d57399e37bce53c264d6fefbe298080cb57ee"
dependencies = [
"utf8parse",
]
[[package]]
name = "anstyle-query"
version = "1.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "5ca11d4be1bab0c8bc8734a9aa7bf4ee8316d462a08c6ac5052f888fef5b494b"
dependencies = [
"windows-sys 0.48.0",
]
[[package]]
name = "anstyle-wincon"
version = "1.0.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "180abfa45703aebe0093f79badacc01b8fd4ea2e35118747e5811127f926e188"
dependencies = [
"anstyle",
"windows-sys 0.48.0",
]
[[package]] [[package]]
name = "anyhow" name = "anyhow"
version = "1.0.71" version = "1.0.71"
@ -59,6 +108,48 @@ version = "1.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd" checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
[[package]]
name = "clap"
version = "4.3.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "401a4694d2bf92537b6867d94de48c4842089645fdcdf6c71865b175d836e9c2"
dependencies = [
"clap_builder",
"clap_derive",
"once_cell",
]
[[package]]
name = "clap_builder"
version = "4.3.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "72394f3339a76daf211e57d4bcb374410f3965dcc606dd0e03738c7888766980"
dependencies = [
"anstream",
"anstyle",
"bitflags",
"clap_lex",
"strsim",
]
[[package]]
name = "clap_derive"
version = "4.3.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b8cd2b2a819ad6eec39e8f1d6b53001af1e5469f8c177579cdaeb313115b825f"
dependencies = [
"heck",
"proc-macro2",
"quote",
"syn 2.0.16",
]
[[package]]
name = "clap_lex"
version = "0.5.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "2da6da31387c7e4ef160ffab6d5e7f00c42626fe39aea70a7b0f1773f7dd6c1b"
[[package]] [[package]]
name = "codespan-reporting" name = "codespan-reporting"
version = "0.11.1" version = "0.11.1"
@ -69,6 +160,12 @@ dependencies = [
"unicode-width", "unicode-width",
] ]
[[package]]
name = "colorchoice"
version = "1.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "acbf1af155f9b9ef647e42cdc158db4b64a1b61f743629225fde6f3e0be2a7c7"
[[package]] [[package]]
name = "cxx" name = "cxx"
version = "1.0.94" version = "1.0.94"
@ -143,6 +240,12 @@ version = "0.12.3"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888" checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
[[package]]
name = "heck"
version = "0.4.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
[[package]] [[package]]
name = "hermit-abi" name = "hermit-abi"
version = "0.3.1" version = "0.3.1"
@ -179,6 +282,18 @@ dependencies = [
"windows-sys 0.48.0", "windows-sys 0.48.0",
] ]
[[package]]
name = "is-terminal"
version = "0.4.7"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "adcf93614601c8129ddf72e2d5633df827ba6551541c6d8c59520a371475be1f"
dependencies = [
"hermit-abi",
"io-lifetimes",
"rustix",
"windows-sys 0.48.0",
]
[[package]] [[package]]
name = "libc" name = "libc"
version = "0.2.144" version = "0.2.144"
@ -218,10 +333,12 @@ dependencies = [
"anyhow", "anyhow",
"base", "base",
"byteorder", "byteorder",
"clap",
"cxx", "cxx",
"cxx-gen", "cxx-gen",
"protobuf", "protobuf",
"protobuf-codegen", "protobuf-codegen",
"size",
] ]
[[package]] [[package]]
@ -385,6 +502,18 @@ dependencies = [
"windows-sys 0.48.0", "windows-sys 0.48.0",
] ]
[[package]]
name = "size"
version = "0.4.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9fed904c7fb2856d868b92464fc8fa597fce366edea1a9cbfaa8cb5fe080bd6d"
[[package]]
name = "strsim"
version = "0.10.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
[[package]] [[package]]
name = "syn" name = "syn"
version = "1.0.109" version = "1.0.109"
@ -461,6 +590,12 @@ version = "0.1.10"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c0edd1e5b14653f783770bce4a4dabb4a5108a5370a5f5d8cfe8710c361f6c8b" checksum = "c0edd1e5b14653f783770bce4a4dabb4a5108a5370a5f5d8cfe8710c361f6c8b"
[[package]]
name = "utf8parse"
version = "0.2.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
[[package]] [[package]]
name = "which" name = "which"
version = "4.4.0" version = "4.4.0"

View File

@ -17,3 +17,5 @@ cxx = { path = "../external/cxx-rs" }
protobuf = { workspace = true } protobuf = { workspace = true }
byteorder = { workspace = true } byteorder = { workspace = true }
anyhow = { workspace = true } anyhow = { workspace = true }
clap = { version = "4.3.2", features = ["derive"] }
size = "0.4.1"

View File

@ -1,241 +0,0 @@
#include <unistd.h>
#include <fcntl.h>
#include <libgen.h>
#include <algorithm>
#include <base.hpp>
#include "cpio.hpp"
using namespace std;
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];
} __attribute__((packed));
static uint32_t x8u(const char *hex) {
uint32_t val, inpos = 8, outpos;
char pattern[6];
while (*hex == '0') {
hex++;
if (!--inpos) return 0;
}
// Because scanf gratuitously treats %*X differently than printf does.
sprintf(pattern, "%%%dx%%n", inpos);
sscanf(hex, pattern, &val, &outpos);
if (inpos != outpos)
LOGE("bad cpio header\n");
return val;
}
cpio_entry::cpio_entry(uint32_t mode) : mode(mode), uid(0), gid(0), data(0) {}
cpio_entry::cpio_entry(uint32_t mode, byte_view data) :
mode(mode), uid(0), gid(0), data(data.clone()) {}
cpio_entry::cpio_entry(const cpio_newc_header *h) :
mode(x8u(h->mode)), uid(x8u(h->uid)), gid(x8u(h->gid)), data(x8u(h->filesize)) {}
void cpio::dump(const char *file) {
fprintf(stderr, "Dump cpio: [%s]\n", file);
dump(xfopen(file, "we"));
}
void cpio::rm(entry_map::iterator it) {
if (it == entries.end())
return;
fprintf(stderr, "Remove [%s]\n", it->first.data());
entries.erase(it);
}
void cpio::rm(const char *name, bool r) {
size_t len = strlen(name);
for (auto it = entries.begin(); it != entries.end();) {
if (it->first.compare(0, len, name) == 0 &&
((r && it->first[len] == '/') || it->first[len] == '\0')) {
auto tmp = it;
++it;
rm(tmp);
if (!r) return;
} else {
++it;
}
}
}
static void extract_entry(const cpio::entry_map::value_type &e, const char *file) {
fprintf(stderr, "Extract [%s] to [%s]\n", e.first.data(), file);
unlink(file);
rmdir(file);
// Make sure parent folders exist
char *parent = dirname(file);
xmkdirs(parent, 0755);
if (S_ISDIR(e.second->mode)) {
xmkdir(file, e.second->mode & 0777);
} else if (S_ISREG(e.second->mode)) {
int fd = xopen(file, O_CREAT | O_WRONLY | O_TRUNC, e.second->mode & 0777);
xwrite(fd, e.second->data.buf(), e.second->data.sz());
fchown(fd, e.second->uid, e.second->gid);
close(fd);
} else if (S_ISLNK(e.second->mode) && e.second->data.sz() < 4096) {
char target[4096];
memcpy(target, e.second->data.buf(), e.second->data.sz());
target[e.second->data.sz()] = '\0';
symlink(target, file);
}
}
void cpio::extract() {
for (auto &e : entries)
extract_entry(e, e.first.data());
}
bool cpio::extract(const char *name, const char *file) {
auto it = entries.find(name);
if (it != entries.end()) {
extract_entry(*it, file);
return true;
}
fprintf(stderr, "Cannot find the file entry [%s]\n", name);
return false;
}
bool cpio::exists(const char *name) {
return entries.count(name) != 0;
}
#define do_out(buf, len) pos += fwrite(buf, 1, len, out);
#define out_align() do_out(zeros, align_padding(pos, 4))
void cpio::dump(FILE *out) {
size_t pos = 0;
unsigned inode = 300000;
char header[111];
char zeros[4] = {0};
for (auto &e : entries) {
sprintf(header, "070701%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x",
inode++, // e->ino
e.second->mode,
e.second->uid,
e.second->gid,
1, // e->nlink
0, // e->mtime
(uint32_t) e.second->data.sz(),
0, // e->devmajor
0, // e->devminor
0, // e->rdevmajor
0, // e->rdevminor
(uint32_t) e.first.size() + 1,
0 // e->check
);
do_out(header, 110);
do_out(e.first.data(), e.first.size() + 1);
out_align();
if (e.second->data.sz()) {
do_out(e.second->data.buf(), e.second->data.sz());
out_align();
}
}
// Write trailer
sprintf(header, "070701%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x%08x",
inode++, 0755, 0, 0, 1, 0, 0, 0, 0, 0, 0, 11, 0);
do_out(header, 110);
do_out("TRAILER!!!\0", 11);
out_align();
fclose(out);
}
void cpio::load_cpio(const char *file) {
fprintf(stderr, "Loading cpio: [%s]\n", file);
mmap_data m(file);
load_cpio(reinterpret_cast<char *>(m.buf()), m.sz());
}
void cpio::insert(string_view name, cpio_entry *e) {
auto it = entries.find(name);
if (it != entries.end()) {
it->second.reset(e);
} else {
entries.emplace(name, e);
}
}
void cpio::add(mode_t mode, const char *name, const char *file) {
mmap_data m(file);
auto e = new cpio_entry(S_IFREG | mode, m);
insert(name, e);
fprintf(stderr, "Add entry [%s] (%04o)\n", name, mode);
}
void cpio::mkdir(mode_t mode, const char *name) {
insert(name, new cpio_entry(S_IFDIR | mode));
fprintf(stderr, "Create directory [%s] (%04o)\n", name, mode);
}
void cpio::ln(const char *target, const char *name) {
auto e = new cpio_entry(S_IFLNK, {target, false});
insert(name, e);
fprintf(stderr, "Create symlink [%s] -> [%s]\n", name, target);
}
void cpio::mv(entry_map::iterator it, const char *name) {
fprintf(stderr, "Move [%s] -> [%s]\n", it->first.data(), name);
auto e = it->second.release();
entries.erase(it);
insert(name, e);
}
bool cpio::mv(const char *from, const char *to) {
auto it = entries.find(from);
if (it != entries.end()) {
mv(it, to);
return true;
}
fprintf(stderr, "Cannot find entry %s\n", from);
return false;
}
#define pos_align(p) p = align_to(p, 4)
void cpio::load_cpio(const char *buf, size_t sz) {
size_t pos = 0;
while (pos < sz) {
auto hdr = reinterpret_cast<const cpio_newc_header *>(buf + pos);
if (memcmp(hdr->magic, "070701", 6) != 0)
LOGE("bad cpio header\n");
pos += sizeof(cpio_newc_header);
string_view name(buf + pos);
pos += x8u(hdr->namesize);
pos_align(pos);
if (name == "." || name == "..")
continue;
if (name == "TRAILER!!!") {
// Android support multiple CPIO being concatenated
// Search for the next cpio header
auto next = static_cast<const char *>(memmem(buf + pos, sz - pos, "070701", 6));
if (next == nullptr)
break;
pos = next - buf;
continue;
}
auto entry = new cpio_entry(hdr);
memcpy(entry->data.buf(), buf + pos, entry->data.sz());
pos += entry->data.sz();
insert(name, entry);
pos_align(pos);
}
}

View File

@ -1,55 +0,0 @@
#pragma once
#include <stdint.h>
#include <string>
#include <memory>
#include <map>
#include <string_view>
#include <base.hpp>
struct cpio_newc_header;
struct cpio_entry {
uint32_t mode;
uint32_t uid;
uint32_t gid;
heap_data data;
explicit cpio_entry(uint32_t mode);
explicit cpio_entry(uint32_t mode, byte_view data);
explicit cpio_entry(const cpio_newc_header *h);
};
class cpio {
public:
struct StringCmp {
using is_transparent = void;
bool operator()(std::string_view a, std::string_view b) const {
return a < b;
}
};
using entry_map = std::map<std::string, std::unique_ptr<cpio_entry>, StringCmp>;
void load_cpio(const char *file);
void dump(const char *file);
void rm(const char *name, bool r = false);
void extract();
bool extract(const char *name, const char *file);
bool exists(const char *name);
void add(mode_t mode, const char *name, const char *file);
void mkdir(mode_t mode, const char *name);
void ln(const char *target, const char *name);
bool mv(const char *from, const char *to);
protected:
entry_map entries;
void rm(entry_map::iterator it);
void mv(entry_map::iterator it, const char *name);
private:
void dump(FILE *out);
void insert(std::string_view name, cpio_entry *e);
void load_cpio(const char *buf, size_t sz);
};

519
native/src/boot/cpio.rs Normal file
View File

@ -0,0 +1,519 @@
use crate::ramdisk::MagiskCpio;
use anyhow::{anyhow, Context};
use base::libc::{
c_char, dev_t, gid_t, major, makedev, minor, mknod, mmap, mode_t, munmap, uid_t, MAP_FAILED,
MAP_PRIVATE, PROT_READ, S_IFBLK, S_IFCHR, S_IFDIR, S_IFLNK, S_IFMT, S_IFREG, S_IRGRP, S_IROTH,
S_IRUSR, S_IWGRP, S_IWOTH, S_IWUSR, S_IXGRP, S_IXOTH, S_IXUSR,
};
use base::{ptr_to_str_result, ResultExt, WriteExt};
use clap::{Parser, Subcommand};
use size::{Base, Size, Style};
use std::collections::BTreeMap;
use std::ffi::CStr;
use std::fmt::{Display, Formatter};
use std::fs::{metadata, read, DirBuilder, File};
use std::io::Write;
use std::mem::size_of;
use std::os::fd::AsRawFd;
use std::os::unix::fs::{symlink, DirBuilderExt, FileTypeExt, MetadataExt};
use std::path::Path;
use std::process::exit;
#[derive(Parser)]
struct CpioCli {
#[command(subcommand)]
command: CpioCommands,
}
#[derive(Subcommand)]
enum CpioCommands {
Test {},
Restore {},
Patch {},
Exists {
path: String,
},
Backup {
origin: String,
},
Rm {
path: String,
#[arg(short)]
recursive: bool,
},
Mv {
from: String,
to: String,
},
Extract {
path: Option<String>,
out: Option<String>,
},
Mkdir {
#[arg(value_parser=parse_mode)]
mode: mode_t,
dir: String,
},
Ln {
src: String,
dst: String,
},
Add {
#[arg(value_parser=parse_mode)]
mode: mode_t,
path: String,
file: String,
},
Ls {
path: Option<String>,
#[arg(short)]
recursive: bool,
},
}
#[repr(C, packed)]
struct CpioHeader {
magic: [u8; 6],
ino: [u8; 8],
mode: [u8; 8],
uid: [u8; 8],
gid: [u8; 8],
nlink: [u8; 8],
mtime: [u8; 8],
filesize: [u8; 8],
devmajor: [u8; 8],
devminor: [u8; 8],
rdevmajor: [u8; 8],
rdevminor: [u8; 8],
namesize: [u8; 8],
check: [u8; 8],
}
pub(crate) struct Cpio {
pub(crate) entries: BTreeMap<String, CpioEntry>,
}
pub(crate) struct CpioEntry {
pub(crate) mode: mode_t,
pub(crate) uid: uid_t,
pub(crate) gid: gid_t,
pub(crate) rdevmajor: dev_t,
pub(crate) rdevminor: dev_t,
pub(crate) data: Vec<u8>,
}
impl Cpio {
fn new() -> Self {
Self {
entries: BTreeMap::new(),
}
}
fn load_from_data(data: &[u8]) -> anyhow::Result<Self> {
let mut cpio = Cpio::new();
let mut pos = 0usize;
while pos < data.len() {
let hdr = unsafe { &*(data.as_ptr().add(pos) as *const CpioHeader) };
if &hdr.magic != b"070701" {
return Err(anyhow!("invalid cpio magic"));
}
pos += size_of::<CpioHeader>();
let name = CStr::from_bytes_until_nul(&data[pos..])?
.to_str()?
.to_string();
pos += x8u::<usize>(&hdr.namesize)?;
pos = align_4(pos);
if name == "." || name == ".." {
continue;
}
if name == "TRAILER!!!" {
match data[pos..].windows(6).position(|x| x == b"070701") {
Some(x) => pos += x,
None => break,
}
continue;
}
let file_size = x8u::<usize>(&hdr.filesize)?;
let entry = CpioEntry {
mode: x8u(&hdr.mode)?,
uid: x8u(&hdr.uid)?,
gid: x8u(&hdr.gid)?,
rdevmajor: x8u(&hdr.rdevmajor)?,
rdevminor: x8u(&hdr.rdevminor)?,
data: data[pos..pos + file_size].to_vec(),
};
pos += file_size;
cpio.entries.insert(name, entry);
pos = align_4(pos);
}
Ok(cpio)
}
pub(crate) fn load_from_file(path: &str) -> anyhow::Result<Self> {
eprintln!("Loading cpio: [{}]", path);
let file = File::open(path)?;
let len = file.metadata()?.len() as usize;
let mmap = unsafe {
mmap(
std::ptr::null_mut(),
len,
PROT_READ,
MAP_PRIVATE,
file.as_raw_fd(),
0,
)
};
if mmap == MAP_FAILED {
return Err(anyhow!("mmap failed"));
}
let data = unsafe { std::slice::from_raw_parts(mmap as *const u8, len) };
let cpio = Self::load_from_data(data)?;
unsafe {
if munmap(mmap, len) != 0 {
return Err(anyhow!("munmap failed"));
}
}
Ok(cpio)
}
fn dump(&self, path: &str) -> anyhow::Result<()> {
eprintln!("Dumping cpio: [{}]", path);
let mut file = File::create(path)?;
let mut pos = 0usize;
let mut inode = 300000i64;
for (name, entry) in &self.entries {
pos += file.write(
format!(
"070701{:08x}{:08x}{:08x}{:08x}{:08x}{:08x}{:08x}{:08x}{:08x}{:08x}{:08x}{:08x}{:08x}",
inode,
entry.mode,
entry.uid,
entry.gid,
1,
0,
entry.data.len(),
0,
0,
entry.rdevmajor,
entry.rdevminor,
name.len() + 1,
0
).as_bytes(),
)?;
pos += file.write(name.as_bytes())?;
pos += file.write(&[0])?;
file.write_zeros(align_4(pos) - pos)?;
pos = align_4(pos);
pos += file.write(&entry.data)?;
file.write_zeros(align_4(pos) - pos)?;
pos = align_4(pos);
inode += 1;
}
pos += file.write(
format!("070701{:08x}{:08x}{:08x}{:08x}{:08x}{:08x}{:08x}{:08x}{:08x}{:08x}{:08x}{:08x}{:08x}",
inode, 0o755, 0, 0, 1, 0, 0, 0, 0, 0, 0, 11, 0
).as_bytes()
)?;
pos += file.write("TRAILER!!!\0".as_bytes())?;
file.write_zeros(align_4(pos) - pos)?;
Ok(())
}
pub(crate) fn rm(&mut self, path: &str, recursive: bool) -> anyhow::Result<()> {
let path = norm_path(path);
let entry = self
.entries
.get(&path)
.ok_or(anyhow!("no such entry {}", path))?;
if entry.mode & S_IFMT == S_IFDIR && !recursive {
return Err(anyhow!("cannot remove directory without -r"));
}
if entry.mode & S_IFMT != S_IFDIR && recursive {
return Err(anyhow!("cannot remove file with -r"));
}
self.entries.remove(&path);
eprintln!("Removed entry [{}]", path);
if recursive {
let path = path + "/";
self.entries.retain(|k, _| {
if k.starts_with(&path) {
eprintln!("Removed entry [{}]", k);
true
} else {
false
}
})
}
Ok(())
}
fn extract_entry(&self, path: &str, out: &Path) -> anyhow::Result<()> {
let entry = self.entries.get(path).ok_or(anyhow!("No such file"))?;
eprintln!("Extracting entry [{}] to [{}]", path, out.to_string_lossy());
if let Some(parent) = out.parent() {
DirBuilder::new()
.mode(0o755)
.recursive(true)
.create(parent)?;
}
match entry.mode & S_IFMT {
S_IFDIR => {
DirBuilder::new()
.mode((entry.mode & 0o777).into())
.create(out)?;
}
S_IFREG => {
let mut file = File::create(out)?;
file.write_all(&entry.data)?;
}
S_IFLNK => {
symlink(Path::new(&std::str::from_utf8(entry.data.as_slice())?), out)?;
}
S_IFBLK | S_IFCHR => {
let dev = makedev(entry.rdevmajor.try_into()?, entry.rdevminor.try_into()?);
unsafe {
mknod(
out.to_str().unwrap().as_ptr() as *const c_char,
entry.mode,
dev,
)
};
}
_ => {
return Err(anyhow!("unknown entry type"));
}
}
Ok(())
}
fn extract(&self, path: Option<&str>, out: Option<&str>) -> anyhow::Result<()> {
let path = path.map(norm_path);
let out = out.map(Path::new);
if let (Some(path), Some(out)) = (&path, &out) {
return self.extract_entry(path, out);
} else {
for path in self.entries.keys() {
if path == "." || path == ".." {
continue;
}
self.extract_entry(path, Path::new(path))?;
}
}
Ok(())
}
pub(crate) fn exists(&self, path: &str) -> bool {
self.entries.contains_key(&norm_path(path))
}
fn add(&mut self, mode: &mode_t, path: &str, file: &str) -> anyhow::Result<()> {
if path.ends_with('/') {
return Err(anyhow!("path cannot end with / for add"));
}
let file = Path::new(file);
let content = read(file)?;
let metadata = metadata(file)?;
let mut rdevmajor: dev_t = 0;
let mut rdevminor: dev_t = 0;
let mode = if metadata.file_type().is_file() {
mode | S_IFREG
} else {
rdevmajor = unsafe { major(metadata.rdev().try_into()?).try_into()? };
rdevminor = unsafe { minor(metadata.rdev().try_into()?).try_into()? };
if metadata.file_type().is_block_device() {
mode | S_IFBLK
} else if metadata.file_type().is_char_device() {
mode | S_IFCHR
} else {
return Err(anyhow!("unsupported file type"));
}
};
self.entries.insert(
norm_path(path),
CpioEntry {
mode,
uid: 0,
gid: 0,
rdevmajor,
rdevminor,
data: content,
},
);
eprintln!("Add file [{}] ({:04o})", path, mode);
Ok(())
}
fn mkdir(&mut self, mode: &mode_t, dir: &str) {
self.entries.insert(
norm_path(dir),
CpioEntry {
mode: *mode | S_IFDIR,
uid: 0,
gid: 0,
rdevmajor: 0,
rdevminor: 0,
data: vec![],
},
);
eprintln!("Create directory [{}] ({:04o})", dir, mode);
}
fn ln(&mut self, src: &str, dst: &str) {
self.entries.insert(
norm_path(dst),
CpioEntry {
mode: S_IFLNK,
uid: 0,
gid: 0,
rdevmajor: 0,
rdevminor: 0,
data: norm_path(src).as_bytes().to_vec(),
},
);
eprintln!("Create symlink [{}] -> [{}]", dst, src);
}
fn mv(&mut self, from: &str, to: &str) -> anyhow::Result<()> {
let entry = self
.entries
.remove(&norm_path(from))
.ok_or(anyhow!("no such entry {}", from))?;
self.entries.insert(norm_path(to), entry);
eprintln!("Move [{}] -> [{}]", from, to);
Ok(())
}
fn ls(&self, path: Option<&str>, recursive: bool) {
let path = path
.map(norm_path)
.map(|p| "/".to_owned() + p.as_str())
.unwrap_or("".to_string());
for (name, entry) in &self.entries {
let p = "/".to_owned() + name.as_str();
if !p.starts_with(&path) {
continue;
}
let p = p.strip_prefix(&path).unwrap();
if !p.is_empty() && !p.starts_with('/') {
continue;
}
if !recursive && !p.is_empty() && p.matches('/').count() > 1 {
continue;
}
println!("{}\t{}", entry, name);
}
}
}
impl Display for CpioEntry {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
write!(
f,
"{}{}{}{}{}{}{}{}{}{}\t{}\t{}\t{}\t{}:{}",
match self.mode & S_IFMT {
S_IFDIR => "d",
S_IFREG => "-",
S_IFLNK => "l",
S_IFBLK => "b",
S_IFCHR => "c",
_ => "?",
},
if self.mode & S_IRUSR != 0 { "r" } else { "-" },
if self.mode & S_IWUSR != 0 { "w" } else { "-" },
if self.mode & S_IXUSR != 0 { "x" } else { "-" },
if self.mode & S_IRGRP != 0 { "r" } else { "-" },
if self.mode & S_IWGRP != 0 { "w" } else { "-" },
if self.mode & S_IXGRP != 0 { "x" } else { "-" },
if self.mode & S_IROTH != 0 { "r" } else { "-" },
if self.mode & S_IWOTH != 0 { "w" } else { "-" },
if self.mode & S_IXOTH != 0 { "x" } else { "-" },
self.uid,
self.gid,
Size::from_bytes(self.data.len())
.format()
.with_style(Style::Abbreviated)
.with_base(Base::Base10)
.to_string(),
self.rdevmajor,
self.rdevminor,
)
}
}
pub fn cpio_commands(argc: i32, argv: *const *const c_char) -> bool {
fn inner(argc: i32, argv: *const *const c_char) -> anyhow::Result<()> {
let mut cmds = Vec::new();
if argc < 1 {
return Err(anyhow!("no arguments"));
}
for i in 0..argc {
let arg = unsafe { ptr_to_str_result(*argv.offset(i as isize)) };
match arg {
Ok(arg) => cmds.push(arg),
Err(e) => Err(e)?,
}
}
let file = cmds[0];
let mut cpio = if Path::new(file).exists() {
Cpio::load_from_file(file)?
} else {
Cpio::new()
};
for cmd in &cmds[1..] {
if cmd.starts_with('#') {
continue;
}
let cmd = "magiskboot ".to_string() + cmd;
let cli = CpioCli::try_parse_from(cmd.split(' ').filter(|x| !x.is_empty()))?;
match &cli.command {
CpioCommands::Test {} => exit(cpio.test()),
CpioCommands::Restore {} => cpio.restore()?,
CpioCommands::Patch {} => cpio.patch(),
CpioCommands::Exists { path } => {
if cpio.exists(path) {
exit(0);
} else {
exit(1);
}
}
CpioCommands::Backup { origin } => cpio.backup(origin)?,
CpioCommands::Rm { path, recursive } => cpio.rm(path, *recursive)?,
CpioCommands::Mv { from, to } => cpio.mv(from, to)?,
CpioCommands::Extract { path, out } => {
cpio.extract(path.as_deref(), out.as_deref())?
}
CpioCommands::Mkdir { mode, dir } => cpio.mkdir(mode, dir),
CpioCommands::Ln { src, dst } => cpio.ln(src, dst),
CpioCommands::Add { mode, path, file } => cpio.add(mode, path, file)?,
CpioCommands::Ls { path, recursive } => {
cpio.ls(path.as_deref(), *recursive);
exit(0);
}
}
}
cpio.dump(file)?;
Ok(())
}
inner(argc, argv)
.context("Failed to process cpio")
.log()
.is_ok()
}
fn x8u<U>(x: &[u8; 8]) -> anyhow::Result<U>
where
U: TryFrom<u32>,
{
// parse hex
let mut ret = 0u32;
for i in x {
let c = *i as char;
let v = c.to_digit(16).ok_or(anyhow!("bad cpio header"))?;
ret = ret * 16 + v;
}
ret.try_into().map_err(|_| anyhow!("bad cpio header"))
}
#[inline(always)]
fn align_4(x: usize) -> usize {
(x + 3) & !3
}
#[inline(always)]
fn norm_path(path: &str) -> String {
let path = path.strip_prefix('/').unwrap_or(path);
path.strip_suffix('/').unwrap_or(path).to_string()
}
fn parse_mode(s: &str) -> Result<mode_t, String> {
mode_t::from_str_radix(s, 8).map_err(|e| e.to_string())
}

View File

@ -1,18 +1,27 @@
#![feature(format_args_nl)] #![feature(format_args_nl)]
#![feature(btree_drain_filter)]
#![feature(iter_collect_into)]
extern crate core; extern crate core;
pub use base; pub use base;
pub use cpio::*;
pub use payload::*; pub use payload::*;
pub use ramdisk::*;
mod cpio;
mod payload; mod payload;
mod ramdisk;
mod update_metadata; mod update_metadata;
#[cxx::bridge] #[cxx::bridge]
pub mod ffi { pub mod ffi {
unsafe extern "C++" { unsafe extern "C++" {
include!("compress.hpp"); include!("compress.hpp");
include!("magiskboot.hpp");
fn decompress(buf: &[u8], fd: i32) -> bool; fn decompress(buf: &[u8], fd: i32) -> bool;
fn patch_encryption(buf: &mut [u8]);
fn patch_verity(buf: &mut [u8]);
} }
#[namespace = "rust"] #[namespace = "rust"]
@ -22,5 +31,7 @@ pub mod ffi {
in_path: *const c_char, in_path: *const c_char,
out_path: *const c_char, out_path: *const c_char,
) -> bool; ) -> bool;
unsafe fn cpio_commands(argc: i32, argv: *const *const c_char) -> bool;
} }
} }

View File

@ -21,7 +21,13 @@ int hexpatch(const char *file, std::string_view from, std::string_view to);
int cpio_commands(int argc, char *argv[]); int cpio_commands(int argc, char *argv[]);
int dtb_commands(int argc, char *argv[]); int dtb_commands(int argc, char *argv[]);
bool patch_verity(byte_data &data); bool patch_verity(byte_data data);
bool patch_encryption(byte_data &data); void patch_verity(rust::Slice<uint8_t> data);
bool patch_encryption(byte_data data);
void patch_encryption(rust::Slice<uint8_t> data);
bool check_env(const char *name); inline bool check_env(const char *name) {
using namespace std::string_view_literals;
const char *val = getenv(name);
return val != nullptr && val == "true"sv;
}

View File

@ -202,7 +202,7 @@ int main(int argc, char *argv[]) {
} else if (argc > 4 && action == "hexpatch") { } else if (argc > 4 && action == "hexpatch") {
return hexpatch(argv[2], argv[3], argv[4]); return hexpatch(argv[2], argv[3], argv[4]);
} else if (argc > 2 && action == "cpio"sv) { } else if (argc > 2 && action == "cpio"sv) {
if (cpio_commands(argc - 2, argv + 2)) if (!rust::cpio_commands(argc - 2, argv + 2))
usage(argv[0]); usage(argv[0]);
} else if (argc > 3 && action == "dtb") { } else if (argc > 3 && action == "dtb") {
if (dtb_commands(argc - 2, argv + 2)) if (dtb_commands(argc - 2, argv + 2))

View File

@ -57,10 +57,18 @@ static bool remove_pattern(byte_data &data, int(*pattern_skip)(const char *)) {
return data.sz() != orig_sz; return data.sz() != orig_sz;
} }
bool patch_verity(byte_data &data) { bool patch_verity(byte_data data) {
return remove_pattern(data, skip_verity_pattern); return remove_pattern(data, skip_verity_pattern);
} }
bool patch_encryption(byte_data &data) { void patch_verity(rust::Slice<uint8_t> data) {
patch_verity(byte_data{data.data(), data.size()});
}
bool patch_encryption(byte_data data) {
return remove_pattern(data, skip_encryption_pattern); return remove_pattern(data, skip_encryption_pattern);
} }
void patch_encryption(rust::Slice<uint8_t> data) {
patch_encryption(byte_data{data.data(), data.size()});
}

View File

@ -64,7 +64,7 @@ fn do_extract_boot_from_payload(
let manifest = { let manifest = {
let manifest = &mut buf[..manifest_len]; let manifest = &mut buf[..manifest_len];
reader.read_exact(manifest)?; reader.read_exact(manifest)?;
DeltaArchiveManifest::parse_from_bytes(&manifest)? DeltaArchiveManifest::parse_from_bytes(manifest)?
}; };
if !manifest.has_minor_version() || manifest.minor_version() != 0 { if !manifest.has_minor_version() || manifest.minor_version() != 0 {
return Err(bad_payload!( return Err(bad_payload!(
@ -152,7 +152,7 @@ fn do_extract_boot_from_payload(
match data_type { match data_type {
Type::REPLACE => { Type::REPLACE => {
out_file.seek(SeekFrom::Start(out_offset))?; out_file.seek(SeekFrom::Start(out_offset))?;
out_file.write_all(&data)?; out_file.write_all(data)?;
} }
Type::ZERO => { Type::ZERO => {
for ext in operation.dst_extents.iter() { for ext in operation.dst_extents.iter() {

View File

@ -1,261 +0,0 @@
#include <base.hpp>
#include "cpio.hpp"
#include "magiskboot.hpp"
#include "compress.hpp"
using namespace std;
static const char *UNSUPPORT_LIST[] =
{ "sbin/launch_daemonsu.sh", "sbin/su", "init.xposed.rc",
"boot/sbin/launch_daemonsu.sh" };
static const char *MAGISK_LIST[] =
{ ".backup/.magisk", "init.magisk.rc",
"overlay/init.magisk.rc" };
class magisk_cpio : public cpio {
public:
void patch();
int test();
void restore();
void backup(const char *orig);
};
bool check_env(const char *name) {
const char *val = getenv(name);
return val != nullptr && val == "true"sv;
}
void magisk_cpio::patch() {
bool keepverity = check_env("KEEPVERITY");
bool keepforceencrypt = check_env("KEEPFORCEENCRYPT");
fprintf(stderr, "Patch with flag KEEPVERITY=[%s] KEEPFORCEENCRYPT=[%s]\n",
keepverity ? "true" : "false", keepforceencrypt ? "true" : "false");
for (auto it = entries.begin(); it != entries.end();) {
auto cur = it++;
bool fstab = (!keepverity || !keepforceencrypt) &&
S_ISREG(cur->second->mode) &&
!str_starts(cur->first, ".backup") &&
!str_contains(cur->first, "twrp") &&
!str_contains(cur->first, "recovery") &&
str_contains(cur->first, "fstab");
if (!keepverity) {
if (fstab) {
fprintf(stderr, "Found fstab file [%s]\n", cur->first.data());
patch_verity(cur->second->data);
} else if (cur->first == "verity_key") {
rm(cur);
continue;
}
}
if (!keepforceencrypt && fstab) {
patch_encryption(cur->second->data);
}
}
}
#define MAGISK_PATCHED (1 << 0)
#define UNSUPPORTED_CPIO (1 << 1)
#define SONY_INIT (1 << 2)
int magisk_cpio::test() {
int ret = 0;
for (auto file : UNSUPPORT_LIST) {
if (exists(file)) {
return UNSUPPORTED_CPIO;
}
}
for (auto file : MAGISK_LIST) {
if (exists(file)) {
ret |= MAGISK_PATCHED;
break;
}
}
if (exists("init.real"))
ret |= SONY_INIT;
return ret;
}
#define for_each_str(str, buf, size) \
for (char *str = (char *) buf; str < (char *) buf + size; str += strlen(str) + 1)
void magisk_cpio::restore() {
// Collect files
auto bk = entries.end();
auto rl = entries.end();
auto mg = entries.end();
vector<entry_map::iterator> backups;
for (auto it = entries.begin(); it != entries.end(); ++it) {
if (it->first == ".backup") {
bk = it;
} else if (it->first == ".backup/.rmlist") {
rl = it;
} else if (it->first == ".backup/.magisk") {
mg = it;
} else if (str_starts(it->first, ".backup/")) {
backups.emplace_back(it);
}
}
// If the .backup folder is effectively empty, this means that the boot ramdisk was
// created from scratch by an old broken magiskboot. This is just a hacky workaround.
if (bk != entries.end() && mg != entries.end() && rl == entries.end() && backups.empty()) {
fprintf(stderr, "Remove all in ramdisk\n");
entries.clear();
return;
}
// Remove files
rm(bk);
rm(mg);
if (rl != entries.end()) {
for_each_str(file, rl->second->data.buf(), rl->second->data.sz()) {
rm(file);
}
rm(rl);
}
// Restore files
for (auto it : backups) {
const char *name = &it->first[8];
mv(it, name);
}
}
void magisk_cpio::backup(const char *orig) {
entry_map backups;
string rm_list;
backups.emplace(".backup", new cpio_entry(S_IFDIR));
magisk_cpio o;
if (access(orig, R_OK) == 0)
o.load_cpio(orig);
// Remove existing backups in original ramdisk
o.rm(".backup", true);
rm(".backup", true);
auto lhs = o.entries.begin();
auto rhs = entries.begin();
while (lhs != o.entries.end() || rhs != entries.end()) {
int res;
bool do_backup = false;
if (lhs != o.entries.end() && rhs != entries.end()) {
res = lhs->first.compare(rhs->first);
} else if (lhs == o.entries.end()) {
res = 1;
} else {
res = -1;
}
if (res < 0) {
// Something is missing in new ramdisk, do_backup!
do_backup = true;
fprintf(stderr, "Backup missing entry: ");
} else if (res == 0) {
if (!lhs->second->data.equals(rhs->second->data)) {
// Not the same!
do_backup = true;
fprintf(stderr, "Backup mismatch entry: ");
}
} else {
// Something new in ramdisk
rm_list += rhs->first;
rm_list += (char) '\0';
fprintf(stderr, "Record new entry: [%s] -> [.backup/.rmlist]\n", rhs->first.data());
}
if (do_backup) {
string name = ".backup/" + lhs->first;
fprintf(stderr, "[%s] -> [%s]\n", lhs->first.data(), name.data());
auto e = lhs->second.release();
backups.emplace(name, e);
}
// Increment positions
if (res < 0) {
++lhs;
} else if (res == 0) {
++lhs; ++rhs;
} else {
++rhs;
}
}
if (!rm_list.empty()) {
auto rm_list_file = new cpio_entry(S_IFREG, {rm_list, false});
backups.emplace(".backup/.rmlist", rm_list_file);
}
if (backups.size() > 1)
entries.merge(backups);
}
int cpio_commands(int argc, char *argv[]) {
char *incpio = argv[0];
++argv;
--argc;
magisk_cpio cpio;
if (access(incpio, R_OK) == 0)
cpio.load_cpio(incpio);
int cmdc;
char *cmdv[6];
for (int i = 0; i < argc; ++i) {
// Reset
cmdc = 0;
memset(cmdv, 0, sizeof(cmdv));
// Split the commands
char *tok = strtok(argv[i], " ");
while (tok && cmdc < std::size(cmdv)) {
if (cmdc == 0 && tok[0] == '#')
break;
cmdv[cmdc++] = tok;
tok = strtok(nullptr, " ");
}
if (cmdc == 0)
continue;
if (cmdv[0] == "test"sv) {
exit(cpio.test());
} else if (cmdv[0] == "restore"sv) {
cpio.restore();
} else if (cmdv[0] == "patch"sv) {
cpio.patch();
} else if (cmdc == 2 && cmdv[0] == "exists"sv) {
exit(!cpio.exists(cmdv[1]));
} else if (cmdc == 2 && cmdv[0] == "backup"sv) {
cpio.backup(cmdv[1]);
} else if (cmdc >= 2 && cmdv[0] == "rm"sv) {
bool r = cmdc > 2 && cmdv[1] == "-r"sv;
cpio.rm(cmdv[1 + r], r);
} else if (cmdc == 3 && cmdv[0] == "mv"sv) {
cpio.mv(cmdv[1], cmdv[2]);
} else if (cmdv[0] == "extract"sv) {
if (cmdc == 3) {
return !cpio.extract(cmdv[1], cmdv[2]);
} else {
cpio.extract();
return 0;
}
} else if (cmdc == 3 && cmdv[0] == "mkdir"sv) {
cpio.mkdir(strtoul(cmdv[1], nullptr, 8), cmdv[2]);
} else if (cmdc == 3 && cmdv[0] == "ln"sv) {
cpio.ln(cmdv[1], cmdv[2]);
} else if (cmdc == 4 && cmdv[0] == "add"sv) {
cpio.add(strtoul(cmdv[1], nullptr, 8), cmdv[2], cmdv[3]);
} else {
return 1;
}
}
cpio.dump(incpio);
return 0;
}

192
native/src/boot/ramdisk.rs Normal file
View File

@ -0,0 +1,192 @@
use crate::cpio::{Cpio, CpioEntry};
use crate::ffi::{patch_encryption, patch_verity};
use base::libc::{S_IFDIR, S_IFMT, S_IFREG};
use std::cmp::Ordering;
use std::collections::HashMap;
use std::env;
use std::str::from_utf8;
pub trait MagiskCpio {
fn patch(&mut self);
fn test(&self) -> i32;
fn restore(&mut self) -> anyhow::Result<()>;
fn backup(&mut self, origin: &str) -> anyhow::Result<()>;
}
const MAGISK_PATCHED: i32 = 1 << 0;
const UNSUPPORTED_CPIO: i32 = 1 << 1;
const SONY_INIT: i32 = 1 << 2;
#[inline(always)]
fn check_env(env: &str) -> bool {
env::var(env).map_or(false, |var| var == "true")
}
impl MagiskCpio for Cpio {
fn patch(&mut self) {
let keep_verity = check_env("KEEPVERITY");
let keep_force_encrypt = check_env("KEEPFORCEENCRYPT");
eprintln!(
"Patch with flag KEEPVERITY=[{}] KEEPFORCEENCRYPT=[{}]",
keep_verity, keep_force_encrypt
);
self.entries.retain(|name, entry| {
let fstab = (!keep_verity || !keep_force_encrypt)
&& entry.mode & S_IFMT == S_IFREG
&& !name.starts_with(".backup")
&& !name.starts_with("twrp")
&& !name.starts_with("recovery")
&& name.starts_with("fstab");
if !keep_verity {
if fstab {
eprintln!("Found fstab file [{}]", name);
patch_verity(entry.data.as_mut_slice());
} else if name == "verity_key" {
return false;
}
}
if !keep_force_encrypt && fstab {
patch_encryption(entry.data.as_mut_slice());
}
true
});
}
fn test(&self) -> i32 {
let mut ret = 0;
for file in [
"sbin/launch_daemonsu.sh",
"sbin/su",
"init.xposed.rc",
"boot/sbin/launch_daemonsu.sh",
] {
if self.exists(file) {
return UNSUPPORTED_CPIO;
}
}
for file in [
".backup/.magisk",
"init.magisk.rc",
"overlay/init.magisk.rc",
] {
if self.exists(file) {
ret |= MAGISK_PATCHED;
break;
}
}
if self.exists("init.sony.rc") {
ret |= SONY_INIT;
}
ret
}
fn restore(&mut self) -> anyhow::Result<()> {
let mut backups = HashMap::<String, CpioEntry>::new();
let mut rm_list = String::new();
self.entries
.drain_filter(|name, _| name.starts_with(".backup/"))
.for_each(|(name, entry)| {
if name == ".backup/.rmlist" {
if let Ok(data) = from_utf8(&entry.data) {
rm_list.push_str(data);
}
} else if name != ".backup/.magisk" {
backups.insert(name[8..].to_string(), entry);
}
});
self.rm(".backup", false).ok();
if rm_list.is_empty() && backups.is_empty() {
self.entries.clear();
return Ok(());
}
for rm in rm_list.split('\0') {
if !rm.is_empty() {
self.rm(rm, false)?;
}
}
self.entries.extend(backups);
Ok(())
}
fn backup(&mut self, origin: &str) -> anyhow::Result<()> {
let mut backups = HashMap::<String, CpioEntry>::new();
let mut rm_list = String::new();
backups.insert(
".backup".to_string(),
CpioEntry {
mode: S_IFDIR,
uid: 0,
gid: 0,
rdevmajor: 0,
rdevminor: 0,
data: vec![],
},
);
let mut o = Cpio::load_from_file(origin)?;
o.rm(".backup", true).ok();
self.rm(".backup", true).ok();
let mut lhs = o.entries.drain_filter(|_, _| true).peekable();
let mut rhs = self.entries.iter().peekable();
loop {
enum Action<'a> {
Backup(String, CpioEntry),
Record(&'a String),
Noop,
}
let action = match (lhs.peek(), rhs.peek()) {
(Some((l, _)), Some((r, re))) => match l.as_str().cmp(r.as_str()) {
Ordering::Less => {
let (l, le) = lhs.next().unwrap();
Action::Backup(l, le)
}
Ordering::Greater => Action::Record(rhs.next().unwrap().0),
Ordering::Equal => {
let (l, le) = lhs.next().unwrap();
let action = if re.data != le.data {
Action::Backup(l, le)
} else {
Action::Noop
};
rhs.next();
action
}
},
(Some(_), None) => {
let (l, le) = lhs.next().unwrap();
Action::Backup(l, le)
}
(None, Some(_)) => Action::Record(rhs.next().unwrap().0),
(None, None) => {
break;
}
};
match action {
Action::Backup(name, entry) => {
let backup = format!(".backup/{}", name);
eprintln!("Backup [{}] -> [{}]", name, backup);
backups.insert(backup, entry);
}
Action::Record(name) => {
rm_list.push_str(&format!("{}\0", name));
}
Action::Noop => {}
}
}
if !rm_list.is_empty() {
backups.insert(
".backup/.rmlist".to_string(),
CpioEntry {
mode: S_IFREG,
uid: 0,
gid: 0,
rdevmajor: 0,
rdevminor: 0,
data: rm_list.as_bytes().to_vec(),
},
);
}
self.entries.extend(backups);
Ok(())
}
}