241 lines
8.6 KiB
C++
241 lines
8.6 KiB
C++
#include <pb.h>
|
|
#include <pb_decode.h>
|
|
#include <pb_encode.h>
|
|
|
|
#include <utils.hpp>
|
|
|
|
#include "_resetprop.hpp"
|
|
|
|
using namespace std;
|
|
|
|
/* ***********************************************************************
|
|
* Auto generated header and field definitions compiled from
|
|
* https://android.googlesource.com/platform/system/core/+/master/init/persistent_properties.proto
|
|
* Generated with Nanopb: https://github.com/nanopb/nanopb
|
|
* ***********************************************************************/
|
|
|
|
/* Automatically generated nanopb header */
|
|
/* Generated by nanopb-0.4.3 */
|
|
|
|
#if PB_PROTO_HEADER_VERSION != 40
|
|
#error Regenerate this file with the current version of nanopb generator.
|
|
#endif
|
|
|
|
/* Struct definitions */
|
|
struct PersistentProperties {
|
|
pb_callback_t properties;
|
|
};
|
|
|
|
struct PersistentProperties_PersistentPropertyRecord {
|
|
pb_callback_t name;
|
|
bool has_value;
|
|
char value[92];
|
|
};
|
|
|
|
/* Initializer values for message structs */
|
|
#define PersistentProperties_init_default {{{NULL}, NULL}}
|
|
#define PersistentProperties_PersistentPropertyRecord_init_default {{{NULL}, NULL}, false, ""}
|
|
#define PersistentProperties_init_zero {{{NULL}, NULL}}
|
|
#define PersistentProperties_PersistentPropertyRecord_init_zero {{{NULL}, NULL}, false, ""}
|
|
|
|
/* Field tags (for use in manual encoding/decoding) */
|
|
#define PersistentProperties_properties_tag 1
|
|
#define PersistentProperties_PersistentPropertyRecord_name_tag 1
|
|
#define PersistentProperties_PersistentPropertyRecord_value_tag 2
|
|
|
|
/* Struct field encoding specification for nanopb */
|
|
#define PersistentProperties_FIELDLIST(X, a) \
|
|
X(a, CALLBACK, REPEATED, MESSAGE, properties, 1)
|
|
#define PersistentProperties_CALLBACK pb_default_field_callback
|
|
#define PersistentProperties_DEFAULT NULL
|
|
#define PersistentProperties_properties_MSGTYPE PersistentProperties_PersistentPropertyRecord
|
|
|
|
#define PersistentProperties_PersistentPropertyRecord_FIELDLIST(X, a) \
|
|
X(a, CALLBACK, OPTIONAL, STRING, name, 1) \
|
|
X(a, STATIC, OPTIONAL, STRING, value, 2)
|
|
#define PersistentProperties_PersistentPropertyRecord_CALLBACK pb_default_field_callback
|
|
#define PersistentProperties_PersistentPropertyRecord_DEFAULT NULL
|
|
|
|
extern const pb_msgdesc_t PersistentProperties_msg;
|
|
extern const pb_msgdesc_t PersistentProperties_PersistentPropertyRecord_msg;
|
|
|
|
/* Defines for backwards compatibility with code written before nanopb-0.4.0 */
|
|
#define PersistentProperties_fields &PersistentProperties_msg
|
|
#define PersistentProperties_PersistentPropertyRecord_fields &PersistentProperties_PersistentPropertyRecord_msg
|
|
|
|
/* Maximum encoded size of messages (where known) */
|
|
/* PersistentProperties_size depends on runtime parameters */
|
|
/* PersistentProperties_PersistentPropertyRecord_size depends on runtime parameters */
|
|
|
|
PB_BIND(PersistentProperties, PersistentProperties, AUTO)
|
|
|
|
PB_BIND(PersistentProperties_PersistentPropertyRecord, PersistentProperties_PersistentPropertyRecord, AUTO)
|
|
|
|
/* ***************************
|
|
* End of auto generated code
|
|
* ***************************/
|
|
|
|
bool use_pb = false;
|
|
|
|
static bool name_decode(pb_istream_t *stream, const pb_field_t *field, void **arg) {
|
|
string &name = *static_cast<string *>(*arg);
|
|
name.resize(stream->bytes_left);
|
|
return pb_read(stream, (pb_byte_t *)(name.data()), stream->bytes_left);
|
|
}
|
|
|
|
static bool name_encode(pb_ostream_t *stream, const pb_field_t *field, void * const *arg) {
|
|
return pb_encode_tag_for_field(stream, field) &&
|
|
pb_encode_string(stream, (const pb_byte_t *) *arg, strlen((const char *) *arg));
|
|
}
|
|
|
|
static bool prop_decode(pb_istream_t *stream, const pb_field_t *field, void **arg) {
|
|
PersistentProperties_PersistentPropertyRecord prop{};
|
|
string name;
|
|
prop.name.funcs.decode = name_decode;
|
|
prop.name.arg = &name;
|
|
if (!pb_decode(stream, &PersistentProperties_PersistentPropertyRecord_msg, &prop))
|
|
return false;
|
|
auto cb = static_cast<prop_cb*>(*arg);
|
|
cb->exec(std::move(name), prop.value);
|
|
return true;
|
|
}
|
|
|
|
static bool prop_encode(pb_ostream_t *stream, const pb_field_t *field, void * const *arg) {
|
|
PersistentProperties_PersistentPropertyRecord prop{};
|
|
prop.name.funcs.encode = name_encode;
|
|
prop.has_value = true;
|
|
auto &list = *static_cast<prop_list *>(*arg);
|
|
for (auto &p : list) {
|
|
if (!pb_encode_tag_for_field(stream, field))
|
|
return false;
|
|
prop.name.arg = (void *) p.first.data();
|
|
strcpy(prop.value, p.second.data());
|
|
if (!pb_encode_submessage(stream, &PersistentProperties_PersistentPropertyRecord_msg, &prop))
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static bool write_callback(pb_ostream_t *stream, const uint8_t *buf, size_t count) {
|
|
int fd = (intptr_t)stream->state;
|
|
return xwrite(fd, buf, count) == count;
|
|
}
|
|
|
|
static pb_ostream_t create_ostream(const char *filename) {
|
|
int fd = creat(filename, 0644);
|
|
pb_ostream_t o = {
|
|
.callback = write_callback,
|
|
.state = (void*)(intptr_t)fd,
|
|
.max_size = SIZE_MAX,
|
|
.bytes_written = 0,
|
|
};
|
|
return o;
|
|
}
|
|
|
|
static void pb_getprop(prop_cb *prop_cb) {
|
|
LOGD("resetprop: decode with protobuf [" PERSISTENT_PROPERTY_DIR "/persistent_properties]\n");
|
|
PersistentProperties props = {};
|
|
props.properties.funcs.decode = prop_decode;
|
|
props.properties.arg = prop_cb;
|
|
pb_byte_t *buf;
|
|
size_t size;
|
|
mmap_ro(PERSISTENT_PROPERTY_DIR "/persistent_properties", buf, size);
|
|
pb_istream_t stream = pb_istream_from_buffer(buf, size);
|
|
pb_decode(&stream, &PersistentProperties_msg, &props);
|
|
munmap(buf, size);
|
|
}
|
|
|
|
static bool file_getprop(const char *name, char *value) {
|
|
char path[4096];
|
|
snprintf(path, sizeof(path), PERSISTENT_PROPERTY_DIR "/%s", name);
|
|
int fd = open(path, O_RDONLY | O_CLOEXEC);
|
|
if (fd < 0)
|
|
return false;
|
|
LOGD("resetprop: read prop from [%s]\n", path);
|
|
value[read(fd, value, PROP_VALUE_MAX - 1)] = '\0'; // Null terminate the read value
|
|
close(fd);
|
|
return value[0] != '\0';
|
|
}
|
|
|
|
void persist_getprops(prop_cb *prop_cb) {
|
|
if (use_pb) {
|
|
pb_getprop(prop_cb);
|
|
} else {
|
|
auto dir = open_dir(PERSISTENT_PROPERTY_DIR);
|
|
if (!dir) return;
|
|
for (dirent *entry; (entry = xreaddir(dir.get()));) {
|
|
char value[PROP_VALUE_MAX];
|
|
if (file_getprop(entry->d_name, value))
|
|
prop_cb->exec(entry->d_name, value);
|
|
}
|
|
}
|
|
}
|
|
|
|
struct match_prop_name : prop_cb {
|
|
explicit match_prop_name(const char *name) : _name(name) { value[0] = '\0'; }
|
|
void exec(string &&name, const char *val) override {
|
|
if (name == _name)
|
|
strcpy(value, val);
|
|
}
|
|
char value[PROP_VALUE_MAX];
|
|
private:
|
|
const char *_name;
|
|
};
|
|
|
|
string persist_getprop(const char *name) {
|
|
if (use_pb) {
|
|
auto prop = match_prop_name(name);
|
|
pb_getprop(&prop);
|
|
if (prop.value[0]) {
|
|
LOGD("resetprop: getprop (persist) [%s]: [%s]\n", name, prop.value);
|
|
return prop.value;
|
|
}
|
|
} else {
|
|
// Try to read from file
|
|
char value[PROP_VALUE_MAX];
|
|
if (file_getprop(name, value)) {
|
|
LOGD("resetprop: getprop (persist) [%s]: [%s]\n", name, value);
|
|
return value;
|
|
}
|
|
}
|
|
return string();
|
|
}
|
|
|
|
bool persist_deleteprop(const char *name) {
|
|
if (use_pb) {
|
|
prop_list list;
|
|
prop_collector collector(list);
|
|
persist_getprops(&collector);
|
|
|
|
for (auto it = list.begin(); it != list.end(); ++it) {
|
|
if (it->first == name) {
|
|
list.erase(it);
|
|
// Dump the props back
|
|
PersistentProperties props{};
|
|
pb_ostream_t ostream = create_ostream(PERSISTENT_PROPERTY_DIR
|
|
"/persistent_properties.tmp");
|
|
props.properties.funcs.encode = prop_encode;
|
|
props.properties.arg = &list;
|
|
LOGD("resetprop: encode with protobuf [" PERSISTENT_PROPERTY_DIR
|
|
"/persistent_properties.tmp]\n");
|
|
if (!pb_encode(&ostream, &PersistentProperties_msg, &props))
|
|
return false;
|
|
clone_attr(PERSISTENT_PROPERTY_DIR "/persistent_properties",
|
|
PERSISTENT_PROPERTY_DIR "/persistent_properties.tmp");
|
|
rename(PERSISTENT_PROPERTY_DIR "/persistent_properties.tmp",
|
|
PERSISTENT_PROPERTY_DIR "/persistent_properties");
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
} else {
|
|
char path[4096];
|
|
snprintf(path, sizeof(path), PERSISTENT_PROPERTY_DIR "/%s", name);
|
|
if (unlink(path) == 0) {
|
|
LOGD("resetprop: unlink [%s]\n", path);
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|