int property_set(const char *name, const char *value)
{
prop_info *pi;
int ret;
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;
pi = (prop_info*) __system_property_find(name);
if(pi != 0) {
/* ro.* properties may NEVER be modified once set */
// ro，只读的property只能被设定一次
if(!strncmp(name, "ro.", 3)) return -1;
__system_property_update(pi, value, valuelen);
} else {
// 将key和value写入到shared memory中
ret = __system_property_add(name, namelen, value, valuelen);
if (ret < 0) {
ERROR("Failed to set '%s'='%s'\n", name, value);
return ret;
}
}
/* 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) {
char bootmode[PROP_VALUE_MAX];
ret = property_get("ro.bootmode", bootmode);
if (ret <= 0 || (strcmp(bootmode, "charger") != 0)) //do not write prop while charger mode
/*
* 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);
} else if (strcmp("selinux.reload_policy", name) == 0 &&
strcmp("1", value) == 0) {
selinux_reload_policy();
}
property_changed(name, value);
#ifdef AW_BOOSTUP_ENABLE
aw_boost_up_perf(name, value);
#endif
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;
if (strcmp("selinux.reload_policy", name) == 0 && strcmp("1", value) == 0) {
if (selinux_reload_policy() != 0) {
ERROR("Failed to reload policy\n");
}
} else if (strcmp("selinux.restorecon_recursive", name) == 0 && valuelen > 0) {
if (restorecon_recursive(value) != 0) {
ERROR("Failed to restorecon_recursive %s\n", value);
}
}
prop_info* pi = (prop_info*) __system_property_find(name);
if(pi != 0) {
/* ro.* properties may NEVER be modified once set */
if(!strncmp(name, "ro.", 3)) return -1;
__system_property_update(pi, value, valuelen);
} else {
int rc = __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);
}
property_changed(name, value);
return 0;
}
int property_set(const char *name, const char *value)
{
prop_area *pa;
prop_info *pi;
size_t namelen = strlen(name);
size_t 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*) __system_property_find(name);
if(pi != 0) {
/* ro.* properties may NEVER be modified once set */
if(!strncmp(name, "ro.", 3)) return -1;
pa = __system_property_area__;
update_prop_info(pi, value, valuelen);
pa->serial++;
__futex_wake(&pa->serial, INT32_MAX);
} else {
pa = __system_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) pi) - ((unsigned) pa));
pa->count++;
pa->serial++;
__futex_wake(&pa->serial, INT32_MAX);
}
/* 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);
} else if (strcmp("selinux.reload_policy", name) == 0 &&
strcmp("1", value) == 0) {
selinux_reload_policy();
}
property_changed(name, value);
return 0;
}
int property_set_overwirte(const char *name, const char *value, int allow_overwirte_ro) ////Lenovo [EasyImage]
{
prop_info *pi;
int ret;
size_t namelen = strlen(name);
size_t valuelen = strlen(value);
if (!is_legal_property_name(name, namelen)) {
ERROR("PropSet Error:[%s:%s] property name is illegal\n", name, value);
return -1;
}
if (valuelen >= PROP_VALUE_MAX) {
ERROR("PropSet Error:[%s:%s] valuelen %d >= %d\n", name, value, valuelen, PROP_VALUE_MAX);
return -1;
}
#ifdef MTK_INIT
INFO("PropSet [%s:%s] Start>>\n", name, value);
#endif
pi = (prop_info*) __system_property_find(name);
if(pi != 0) {
/* ro.* properties may NEVER be modified once set */
if(allow_overwirte_ro!= 1 && !strncmp(name, "ro.", 3)){
#ifdef MTK_INIT
ERROR("PropSet Error:[%s:%s] ro.* properties may NEVER be modified once set\n", name, value);
#endif
return -1;
}
__system_property_update(pi, value, valuelen);
} else {
#ifdef INIT_ENG_BUILD
prop_area *pa = __system_property_area__;
if ((pa->bytes_used > PA_SIZE_ERR) && (0 == alarmed ))
{
alarmed = 1;
ERROR("[Property Error]: Unable to set [%s:%s] property limit has arrived: %d\n", name, value, pa->bytes_used);
#ifdef MTK_INIT
property_show();
#endif
}
else if ((pa->bytes_used > PA_SIZE_WARN) && (0 == warned ))
{
warned = 1;
NOTICE("[Property Warning]: limit would be arrived:%d (Max:%d). "
"Use getprop to review your properties!\n", pa->bytes_used, PA_SIZE);
#ifdef MTK_INIT
property_show();
#endif
}
#endif
ret = __system_property_add(name, namelen, value, valuelen);
if (ret < 0) {
#ifdef INIT_ENG_BUILD
ERROR("Failed to set '%s'='%s' bytes_used=%u\n", name, value, pa->bytes_used);
#else
ERROR("Failed to set '%s'='%s'\n", name, value);
#endif
return ret;
}
}
/* If name starts with "net." treat as a DNS property. */
if (strncmp("net.", name, strlen("net.")) == 0) {
if (strcmp("net.change", name) == 0) {
#ifdef MTK_INIT
INFO("PropSet [%s:%s] Done\n", name, value);
#endif
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);
} else if (strcmp("selinux.reload_policy", name) == 0 &&
strcmp("1", value) == 0) {
selinux_reload_policy();
}
property_changed(name, value);
#ifdef MTK_INIT
INFO("PropSet [%s:%s] Done\n", name, value);
#endif
return 0;
}