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-rw-r--r--uncrypt/Android.mk4
-rw-r--r--uncrypt/uncrypt.cpp48
-rw-r--r--uncrypt/uncrypt.rc9
3 files changed, 39 insertions, 22 deletions
diff --git a/uncrypt/Android.mk b/uncrypt/Android.mk
index e73c8f1b6..6422cb2f4 100644
--- a/uncrypt/Android.mk
+++ b/uncrypt/Android.mk
@@ -20,8 +20,12 @@ LOCAL_CLANG := true
LOCAL_SRC_FILES := uncrypt.cpp
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/..
+
LOCAL_MODULE := uncrypt
LOCAL_STATIC_LIBRARIES := libbase liblog libfs_mgr libcutils
+LOCAL_INIT_RC := uncrypt.rc
+
include $(BUILD_EXECUTABLE)
diff --git a/uncrypt/uncrypt.cpp b/uncrypt/uncrypt.cpp
index 46da86d61..4956cc297 100644
--- a/uncrypt/uncrypt.cpp
+++ b/uncrypt/uncrypt.cpp
@@ -51,13 +51,19 @@
#include <sys/types.h>
#include <unistd.h>
+#include <memory>
+
#include <base/file.h>
#include <base/strings.h>
+#include <cutils/android_reboot.h>
#include <cutils/properties.h>
#include <fs_mgr.h>
+
#define LOG_TAG "uncrypt"
#include <log/log.h>
+#include "unique_fd.h"
+
#define WINDOW_SIZE 5
static const std::string cache_block_map = "/cache/recovery/block.map";
@@ -180,7 +186,7 @@ static int produce_block_map(const char* path, const char* map_file, const char*
ALOGE("failed to open %s\n", map_file);
return -1;
}
- FILE* mapf = fdopen(mapfd, "w");
+ std::unique_ptr<FILE, int(*)(FILE*)> mapf(fdopen(mapfd, "w"), fclose);
// Make sure we can write to the status_file.
if (!android::base::WriteStringToFd("0\n", status_fd)) {
@@ -189,8 +195,7 @@ static int produce_block_map(const char* path, const char* map_file, const char*
}
struct stat sb;
- int ret = stat(path, &sb);
- if (ret != 0) {
+ if (stat(path, &sb) != 0) {
ALOGE("failed to stat %s\n", path);
return -1;
}
@@ -206,7 +211,8 @@ static int produce_block_map(const char* path, const char* map_file, const char*
ranges[0] = -1;
ranges[1] = -1;
- fprintf(mapf, "%s\n%lld %lu\n", blk_dev, (long long)sb.st_size, (unsigned long)sb.st_blksize);
+ fprintf(mapf.get(), "%s\n%lld %lu\n",
+ blk_dev, (long long)sb.st_size, (unsigned long)sb.st_blksize);
unsigned char* buffers[WINDOW_SIZE];
if (encrypted) {
@@ -219,15 +225,18 @@ static int produce_block_map(const char* path, const char* map_file, const char*
size_t pos = 0;
int fd = open(path, O_RDONLY);
- if (fd < 0) {
+ unique_fd fd_holder(fd);
+ if (fd == -1) {
ALOGE("failed to open fd for reading: %s\n", strerror(errno));
return -1;
}
int wfd = -1;
+ unique_fd wfd_holder(wfd);
if (encrypted) {
- wfd = open(blk_dev, O_WRONLY | O_SYNC);
- if (wfd < 0) {
+ wfd = open(blk_dev, O_WRONLY);
+ wfd_holder = unique_fd(wfd);
+ if (wfd == -1) {
ALOGE("failed to open fd for writing: %s\n", strerror(errno));
return -1;
}
@@ -245,8 +254,7 @@ static int produce_block_map(const char* path, const char* map_file, const char*
if ((tail+1) % WINDOW_SIZE == head) {
// write out head buffer
int block = head_block;
- ret = ioctl(fd, FIBMAP, &block);
- if (ret != 0) {
+ if (ioctl(fd, FIBMAP, &block) != 0) {
ALOGE("failed to find block %d\n", head_block);
return -1;
}
@@ -286,8 +294,7 @@ static int produce_block_map(const char* path, const char* map_file, const char*
while (head != tail) {
// write out head buffer
int block = head_block;
- ret = ioctl(fd, FIBMAP, &block);
- if (ret != 0) {
+ if (ioctl(fd, FIBMAP, &block) != 0) {
ALOGE("failed to find block %d\n", head_block);
return -1;
}
@@ -302,23 +309,20 @@ static int produce_block_map(const char* path, const char* map_file, const char*
++head_block;
}
- fprintf(mapf, "%d\n", range_used);
+ fprintf(mapf.get(), "%d\n", range_used);
for (int i = 0; i < range_used; ++i) {
- fprintf(mapf, "%d %d\n", ranges[i*2], ranges[i*2+1]);
+ fprintf(mapf.get(), "%d %d\n", ranges[i*2], ranges[i*2+1]);
}
if (fsync(mapfd) == -1) {
ALOGE("failed to fsync \"%s\": %s\n", map_file, strerror(errno));
return -1;
}
- fclose(mapf);
- close(fd);
if (encrypted) {
if (fsync(wfd) == -1) {
ALOGE("failed to fsync \"%s\": %s\n", blk_dev, strerror(errno));
return -1;
}
- close(wfd);
}
return 0;
@@ -331,6 +335,8 @@ static void wipe_misc() {
if (!v->mount_point) continue;
if (strcmp(v->mount_point, "/misc") == 0) {
int fd = open(v->blk_device, O_WRONLY | O_SYNC);
+ unique_fd fd_holder(fd);
+
uint8_t zeroes[1088]; // sizeof(bootloader_message) from recovery
memset(zeroes, 0, sizeof(zeroes));
@@ -347,10 +353,8 @@ static void wipe_misc() {
}
if (fsync(fd) == -1) {
ALOGE("failed to fsync \"%s\": %s\n", v->blk_device, strerror(errno));
- close(fd);
return;
}
- close(fd);
}
}
}
@@ -358,7 +362,9 @@ static void wipe_misc() {
static void reboot_to_recovery() {
ALOGI("rebooting to recovery");
property_set("sys.powerctl", "reboot,recovery");
- sleep(10);
+ while (true) {
+ pause();
+ }
ALOGE("reboot didn't succeed?");
}
@@ -433,6 +439,7 @@ int main(int argc, char** argv) {
ALOGE("failed to open pipe \"%s\": %s\n", status_file.c_str(), strerror(errno));
return 1;
}
+ unique_fd status_fd_holder(status_fd);
if (argc == 3) {
// when command-line args are given this binary is being used
@@ -443,7 +450,6 @@ int main(int argc, char** argv) {
std::string package;
if (!find_uncrypt_package(package)) {
android::base::WriteStringToFd("-1\n", status_fd);
- close(status_fd);
return 1;
}
input_path = package.c_str();
@@ -453,12 +459,10 @@ int main(int argc, char** argv) {
int status = uncrypt(input_path, map_file, status_fd);
if (status != 0) {
android::base::WriteStringToFd("-1\n", status_fd);
- close(status_fd);
return 1;
}
android::base::WriteStringToFd("100\n", status_fd);
- close(status_fd);
}
return 0;
diff --git a/uncrypt/uncrypt.rc b/uncrypt/uncrypt.rc
new file mode 100644
index 000000000..5f4c47936
--- /dev/null
+++ b/uncrypt/uncrypt.rc
@@ -0,0 +1,9 @@
+service uncrypt /system/bin/uncrypt
+ class main
+ disabled
+ oneshot
+
+service pre-recovery /system/bin/uncrypt --reboot
+ class main
+ disabled
+ oneshot
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 00:10:19 +0100