twrpinstall: create library for twrpinstall
This library will need to mirror AOSP for any changes to installing
packages. The library has been separated out in order to make importing
updates from AOSP into the TWRP project.
twinstall.cpp has been removed from the recovery binary and added to
this library. It has been refactored for libziparchive.
Sideload has been reworked to use the newer methods from AOSP on
flashing packages through adb sideload.
We are also removing old libraries for adb and verifier.
Lastly before flashing a zip or image, we want to unlock block devices
for writing so that when an OTA is flashed to the inactive slot,
the flash will succeed.
Change-Id: I6d8702fc9031ffaf9f666b4ba375dc7d9362e473
diff --git a/twrpinstall/legacy_property_service.cpp b/twrpinstall/legacy_property_service.cpp
new file mode 100644
index 0000000..c3990f7
--- /dev/null
+++ b/twrpinstall/legacy_property_service.cpp
@@ -0,0 +1,217 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <ctype.h>
+#include <fcntl.h>
+#include <stdarg.h>
+#include <dirent.h>
+#include <limits.h>
+#include <errno.h>
+
+#include "../../bionic/libc/private/bionic_futex.h"
+
+#include <cutils/properties.h>
+
+#include "legacy_properties.h"
+
+#include <sys/mman.h>
+// Not available in 5.0
+//#include <sys/atomics.h>
+#include "legacy_property_service.h"
+
+#ifndef INT32_MAX
+#define INT32_MAX (2147483647)
+#endif
+
+static int property_area_inited = 0;
+
+typedef struct {
+ void *data;
+ size_t size;
+ int fd;
+} workspace;
+
+static int init_workspace(workspace *w, size_t size)
+{
+ void *data;
+ int fd;
+
+ /* dev is a tmpfs that we can use to carve a shared workspace
+ * out of, so let's do that...
+ */
+ fd = open("/dev/__legacy_properties__", O_RDWR | O_CREAT, 0600);
+ if (fd < 0)
+ return -1;
+
+ if (ftruncate(fd, size) < 0)
+ goto out;
+
+ data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+ if(data == MAP_FAILED)
+ goto out;
+
+ close(fd);
+
+ fd = open("/dev/__legacy_properties__", O_RDONLY);
+ if (fd < 0)
+ return -1;
+
+ unlink("/dev/__legacy_properties__");
+
+ w->data = data;
+ w->size = size;
+ w->fd = fd;
+ return 0;
+
+out:
+ close(fd);
+ return -1;
+}
+
+/* (8 header words + 247 toc words) = 1020 bytes */
+/* 1024 bytes header and toc + 247 prop_infos @ 128 bytes = 32640 bytes */
+
+#define PA_COUNT_MAX 247
+#define PA_INFO_START 1024
+#define PA_SIZE 32768
+
+static workspace pa_workspace;
+static prop_info *pa_info_array;
+
+prop_area *__legacy_property_area__;
+
+static int init_property_area(void)
+{
+ prop_area *pa;
+
+ if(pa_info_array)
+ return -1;
+
+ if(init_workspace(&pa_workspace, PA_SIZE))
+ return -1;
+
+ fcntl(pa_workspace.fd, F_SETFD, FD_CLOEXEC);
+
+ pa_info_array = (prop_info*) (((char*) pa_workspace.data) + PA_INFO_START);
+
+ pa = (prop_area*)(pa_workspace.data);
+ memset(pa, 0, PA_SIZE);
+ pa->magic = PROP_AREA_MAGIC;
+ pa->version = PROP_AREA_VERSION;
+
+ /* plug into the lib property services */
+ __legacy_property_area__ = pa;
+ property_area_inited = 1;
+ return 0;
+}
+
+static void update_prop_info(prop_info *pi, const char *value, unsigned len)
+{
+ pi->serial = pi->serial | 1;
+ memcpy(pi->value, value, len + 1);
+ pi->serial = (len << 24) | ((pi->serial + 1) & 0xffffff);
+ __futex_wake(&pi->serial, INT32_MAX);
+}
+
+static const prop_info *__legacy_property_find(const char *name)
+{
+ prop_area *pa = __legacy_property_area__;
+ unsigned count = pa->count;
+ unsigned *toc = pa->toc;
+ unsigned len = strlen(name);
+ prop_info *pi;
+
+ while(count--) {
+ unsigned entry = *toc++;
+ if(TOC_NAME_LEN(entry) != len) continue;
+
+ pi = TOC_TO_INFO(pa, entry);
+ if(memcmp(name, pi->name, len)) continue;
+
+ return pi;
+ }
+
+ return 0;
+}
+
+static int legacy_property_set(const char *name, const char *value)
+{
+ prop_area *pa;
+ prop_info *pi;
+
+ int namelen = strlen(name);
+ int valuelen = strlen(value);
+
+ if(namelen >= PROP_NAME_MAX) return -1;
+ if(valuelen >= PROP_VALUE_MAX) return -1;
+ if(namelen < 1) return -1;
+
+ pi = (prop_info*) __legacy_property_find(name);
+
+
+ if(pi != 0) {
+ /* ro.* properties may NEVER be modified once set */
+ if(!strncmp(name, "ro.", 3)) return -1;
+
+ pa = __legacy_property_area__;
+ update_prop_info(pi, value, valuelen);
+ pa->serial++;
+ __futex_wake(&pa->serial, INT32_MAX);
+ } else {
+ pa = __legacy_property_area__;
+ if(pa->count == PA_COUNT_MAX) return -1;
+
+ pi = pa_info_array + pa->count;
+ pi->serial = (valuelen << 24);
+ memcpy(pi->name, name, namelen + 1);
+ memcpy(pi->value, value, valuelen + 1);
+
+ pa->toc[pa->count] =
+ (namelen << 24) | (((unsigned long) pi) - ((unsigned long) pa));
+
+ pa->count++;
+ pa->serial++;
+ __futex_wake(&pa->serial, INT32_MAX);
+ }
+
+ return 0;
+}
+
+void legacy_get_property_workspace(int *fd, int *sz)
+{
+ *fd = pa_workspace.fd;
+ *sz = pa_workspace.size;
+}
+
+static void copy_property_to_legacy(const char *key, const char *value, void *cookie __unused)
+{
+ legacy_property_set(key, value);
+}
+
+int legacy_properties_init()
+{
+ if(init_property_area() != 0)
+ return -1;
+
+ if(property_list(copy_property_to_legacy, 0) != 0)
+ return -1;
+
+ return 0;
+}