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Add ramdisk compression option

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This commit is contained in:
topjohnwu
2019-02-23 15:04:15 -05:00
parent 267c59b1f1
commit 9c89e56c56
3 changed files with 80 additions and 18 deletions
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38
native/jni/magiskboot/ramdisk.cpp
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@@ -6,17 +6,29 @@
#include <cpio.h>
#include "magiskboot.h"
#include "compress.h"
using namespace std;
static const char *ramdisk_xz = "ramdisk.cpio.xz";
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", ramdisk_xz };
class magisk_cpio : public cpio_rw {
public:
explicit magisk_cpio(const char *filename) : cpio_rw(filename) {}
void patch(bool keepverity, bool keepforceencrypt);
int test();
char * sha1();
char *sha1();
void restore();
void backup(const char *orig);
void compress();
};
void magisk_cpio::patch(bool keepverity, bool keepforceencrypt) {
@@ -47,13 +59,6 @@ void magisk_cpio::patch(bool keepverity, bool keepforceencrypt) {
#define MAGISK_PATCH 0x1
#define UNSUPPORT_PATCH 0x2
int magisk_cpio::test() {
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" };
for (auto file : UNSUPPORT_LIST)
if (exists(file))
return UNSUPPORT_PATCH;
@@ -202,6 +207,21 @@ void magisk_cpio::backup(const char *orig) {
entries.merge(bkup_entries);
}
void magisk_cpio::compress() {
fprintf(stderr, "Compressing cpio -> [%s]\n", ramdisk_xz);
auto init = entries.extract("init");
XZEncoder encoder;
encoder.set_out(make_unique<BufOutStream>());
output(encoder);
encoder.finalize();
entries.clear();
entries.insert(std::move(init));
auto xz = new cpio_entry(ramdisk_xz);
xz->mode = S_IFREG;
static_cast<BufOutStream *>(encoder.get_out())->release(xz->data, xz->filesize);
insert(xz);
}
int cpio_commands(int argc, char *argv[]) {
char *incpio = argv[0];
++argv;
@@ -232,6 +252,8 @@ int cpio_commands(int argc, char *argv[]) {
char *sha1 = cpio.sha1();
if (sha1) printf("%s\n", sha1);
return 0;
} else if (strcmp(cmdv[0], "compress") == 0){
cpio.compress();
} else if (cmdc == 2 && strcmp(cmdv[0], "exists") == 0) {
exit(!cpio.exists(cmdv[1]));
} else if (cmdc == 2 && strcmp(cmdv[0], "backup") == 0) {