int mb__system_property_get(const char* name, char* value) {
const prop_info* pi = mb__system_property_find(name);
if (pi != 0) {
return mb__system_property_read(pi, nullptr, value);
} else {
value[0] = 0;
return 0;
}
}
static int property_set_impl(const char *name, const char *value)
{
size_t namelen = strlen(name);
size_t valuelen = strlen(value);
if (!is_legal_property_name(name, namelen)) {
return -1;
}
if (valuelen >= PROP_VALUE_MAX) {
return -1;
}
prop_info *pi = (prop_info *) mb__system_property_find(name);
if (pi != 0) {
/* ro.* properties may NEVER be modified once set */
if (!strncmp(name, "ro.", 3)) {
return -1;
}
mb__system_property_update(pi, value, valuelen);
} else {
int rc = mb__system_property_add(name, namelen, value, valuelen);
if (rc < 0) {
return rc;
}
}
/* If name starts with "net." treat as a DNS property. */
if (strncmp("net.", name, strlen("net.")) == 0) {
if (strcmp("net.change", name) == 0) {
return 0;
}
/*
* The 'net.change' property is a special property used track when any
* 'net.*' property name is updated. It is _ONLY_ updated here. Its value
* contains the last updated 'net.*' property.
*/
property_set("net.change", name);
} else if (persistent_properties_loaded
&& strncmp("persist.", name, strlen("persist.")) == 0) {
/*
* Don't write properties to disk until after we have read all default properties
* to prevent them from being overwritten by default values.
*/
write_persistent_property(name, value);
}
return 0;
}
bool property_set_direct(const std::string &key, const std::string &value)
{
initialize_properties();
prop_info *pi = const_cast<prop_info *>(
mb__system_property_find(key.c_str()));
int ret;
if (pi) {
ret = mb__system_property_update(pi, value.c_str(),
static_cast<unsigned int>(value.size()));
} else {
ret = mb__system_property_add(key.c_str(),
static_cast<unsigned int>(key.size()),
value.c_str(),
static_cast<unsigned int>(value.size()));
}
return ret == 0;
}
const prop_info *libc_system_property_find(const char *name)
{
initialize_properties();
return mb__system_property_find(name);
}
