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;
}
void handle_property_set_fd()
{
prop_msg msg;
int s;
int r;
int res;
struct ucred cr;
struct sockaddr_un addr;
socklen_t addr_size = sizeof(addr);
socklen_t cr_size = sizeof(cr);
char * source_ctx = NULL;
if ((s = accept(property_set_fd, (struct sockaddr *) &addr, &addr_size)) < 0) {
return;
}
/* Check socket options here */
if (getsockopt(s, SOL_SOCKET, SO_PEERCRED, &cr, &cr_size) < 0) {
close(s);
ERROR("Unable to receive socket options\n");
return;
}
r = TEMP_FAILURE_RETRY(recv(s, &msg, sizeof(msg), 0));
if(r != sizeof(prop_msg)) {
ERROR("sys_prop: mis-match msg size received: %d expected: %zu errno: %d\n",
r, sizeof(prop_msg), errno);
close(s);
return;
}
switch(msg.cmd) {
case PROP_MSG_SETPROP:
msg.name[PROP_NAME_MAX-1] = 0;
msg.value[PROP_VALUE_MAX-1] = 0;
if (!is_legal_property_name(msg.name, strlen(msg.name))) {
ERROR("sys_prop: illegal property name. Got: \"%s\"\n", msg.name);
close(s);
return;
}
getpeercon(s, &source_ctx);
if(memcmp(msg.name,"ctl.",4) == 0) {
// Keep the old close-socket-early behavior when handling
// ctl.* properties.
close(s);
if (check_control_perms(msg.value, cr.uid, cr.gid, source_ctx)) {
handle_control_message((char*) msg.name + 4, (char*) msg.value);
} else {
ERROR("sys_prop: Unable to %s service ctl [%s] uid:%d gid:%d pid:%d\n",
msg.name + 4, msg.value, cr.uid, cr.gid, cr.pid);
}
} else {
if (check_perms(msg.name, cr.uid, cr.gid, source_ctx)) {
property_set((char*) msg.name, (char*) msg.value);
} else {
ERROR("sys_prop: permission denied uid:%d name:%s\n",
cr.uid, msg.name);
}
// Note: bionic's property client code assumes that the
// property server will not close the socket until *AFTER*
// the property is written to memory.
close(s);
}
freecon(source_ctx);
break;
default:
close(s);
break;
}
}
static void handle_property_set_fd()
{
prop_msg msg;
int s;
int r;
struct ucred cr;
struct sockaddr_un addr;
socklen_t addr_size = sizeof(addr);
socklen_t cr_size = sizeof(cr);
struct pollfd ufds[1];
const int timeout_ms = 2 * 1000; /* Default 2 sec timeout for caller to send property. */
int nr;
if ((s = accept(property_set_fd, (struct sockaddr *) &addr, &addr_size)) < 0) {
return;
}
/* Check socket options here */
if (getsockopt(s, SOL_SOCKET, SO_PEERCRED, &cr, &cr_size) < 0) {
close(s);
LOGE("Unable to receive socket options");
return;
}
ufds[0].fd = s;
ufds[0].events = POLLIN;
ufds[0].revents = 0;
nr = TEMP_FAILURE_RETRY(poll(ufds, 1, timeout_ms));
if (nr == 0) {
LOGE("sys_prop: timeout waiting for uid=%d to send property message.", cr.uid);
close(s);
return;
} else if (nr < 0) {
LOGE("sys_prop: error waiting for uid=%d to send property message: %s",
cr.uid, strerror(errno));
close(s);
return;
}
r = TEMP_FAILURE_RETRY(recv(s, &msg, sizeof(msg), MSG_DONTWAIT));
if (r != sizeof(prop_msg)) {
LOGE("sys_prop: mis-match msg size received: %d expected: %zu: %s",
r, sizeof(prop_msg), strerror(errno));
close(s);
return;
}
switch (msg.cmd) {
case PROP_MSG_SETPROP:
msg.name[PROP_NAME_MAX - 1] = 0;
msg.value[PROP_VALUE_MAX - 1] = 0;
if (!is_legal_property_name(msg.name, strlen(msg.name))) {
LOGE("sys_prop: illegal property name. Got: \"%s\"", msg.name);
close(s);
return;
}
if (memcmp(msg.name, "ctl.", 4) == 0) {
// Keep the old close-socket-early behavior when handling
// ctl.* properties.
close(s);
LOGV("Ignoring control message: %s=%s", msg.name, msg.value);
} else {
property_set((char *) msg.name, (char *) msg.value);
// Note: bionic's property client code assumes that the
// property server will not close the socket until *AFTER*
// the property is written to memory.
close(s);
}
break;
default:
close(s);
break;
}
}
static void handle_property_set_fd()
{
prop_msg msg;
int s;
int r;
struct ucred cr;
struct sockaddr_un addr;
socklen_t addr_size = sizeof(addr);
socklen_t cr_size = sizeof(cr);
char * source_ctx = NULL;
struct pollfd ufds[1];
const int timeout_ms = 2 * 1000; /* Default 2 sec timeout for caller to send property. */
int nr;
if ((s = accept(property_set_fd, (struct sockaddr *) &addr, &addr_size)) < 0) {
return;
}
/* Check socket options here */
if (getsockopt(s, SOL_SOCKET, SO_PEERCRED, &cr, &cr_size) < 0) {
close(s);
PLOG(ERROR) << "Unable to receive socket options";
return;
}
ufds[0].fd = s;
ufds[0].events = POLLIN;
ufds[0].revents = 0;
nr = TEMP_FAILURE_RETRY(poll(ufds, 1, timeout_ms));
if (nr == 0) {
LOG(ERROR) << "sys_prop: timeout waiting for uid " << cr.uid << " to send property message.";
close(s);
return;
} else if (nr < 0) {
PLOG(ERROR) << "sys_prop: error waiting for uid " << cr.uid << " to send property message";
close(s);
return;
}
r = TEMP_FAILURE_RETRY(recv(s, &msg, sizeof(msg), MSG_DONTWAIT));
if(r != sizeof(prop_msg)) {
PLOG(ERROR) << "sys_prop: mis-match msg size received: " << r << " expected: " << sizeof(prop_msg);
close(s);
return;
}
switch(msg.cmd) {
case PROP_MSG_SETPROP:
msg.name[PROP_NAME_MAX-1] = 0;
msg.value[PROP_VALUE_MAX-1] = 0;
if (!is_legal_property_name(msg.name, strlen(msg.name))) {
LOG(ERROR) << "sys_prop: illegal property name \"" << msg.name << "\"";
close(s);
return;
}
getpeercon(s, &source_ctx);
if(memcmp(msg.name,"ctl.",4) == 0) {
// Keep the old close-socket-early behavior when handling
// ctl.* properties.
close(s);
if (check_control_mac_perms(msg.value, source_ctx, &cr)) {
handle_control_message((char*) msg.name + 4, (char*) msg.value);
} else {
LOG(ERROR) << "sys_prop: Unable to " << (msg.name + 4)
<< " service ctl [" << msg.value << "]"
<< " uid:" << cr.uid
<< " gid:" << cr.gid
<< " pid:" << cr.pid;
}
} else {
if (check_mac_perms(msg.name, source_ctx, &cr)) {
property_set((char*) msg.name, (char*) msg.value);
} else {
LOG(ERROR) << "sys_prop: permission denied uid:" << cr.uid << " name:" << msg.name;
}
// Note: bionic's property client code assumes that the
// property server will not close the socket until *AFTER*
// the property is written to memory.
close(s);
}
freecon(source_ctx);
break;
default:
close(s);
break;
}
}
void handle_property_set_fd()
{
prop_msg msg;
int s;
int r;
int res;
struct ucred cr;
struct sockaddr_un addr;
socklen_t addr_size = sizeof(addr);
socklen_t cr_size = sizeof(cr);
char * source_ctx = NULL;
struct pollfd ufds[1];
const int timeout_ms = 2 * 1000; /* Default 2 sec timeout for caller to send property. */
int nr;
if ((s = accept(property_set_fd, (struct sockaddr *) &addr, &addr_size)) < 0) {
return;
}
/* Check socket options here */
if (getsockopt(s, SOL_SOCKET, SO_PEERCRED, &cr, &cr_size) < 0) {
close(s);
ERROR("Unable to receive socket options\n");
return;
}
ufds[0].fd = s;
ufds[0].events = POLLIN;
ufds[0].revents = 0;
nr = TEMP_FAILURE_RETRY(poll(ufds, 1, timeout_ms));
if (nr == 0) {
ERROR("sys_prop: timeout waiting for pid=%d uid=%d gid=%d to send property message.\n", cr.pid, cr.uid, cr.gid);
close(s);
return;
} else if (nr < 0) {
ERROR("sys_prop: error waiting for pid=%d uid=%d gid=%d to send property message. err=%d %s\n", cr.pid, cr.uid, cr.gid, errno, strerror(errno));
close(s);
return;
}
r = TEMP_FAILURE_RETRY(recv(s, &msg, sizeof(msg), MSG_DONTWAIT));
if(r != sizeof(prop_msg)) {
ERROR("sys_prop: mis-match msg size received: %d from pid=%d uid=%d gid=%d expected: %zu errno: %d\n",
r, cr.pid, cr.uid, cr.gid, sizeof(prop_msg), errno);
close(s);
return;
}
switch(msg.cmd) {
case PROP_MSG_SETPROP:
msg.name[PROP_NAME_MAX-1] = 0;
msg.value[PROP_VALUE_MAX-1] = 0;
if (!is_legal_property_name(msg.name, strlen(msg.name))) {
ERROR("sys_prop: illegal property name. Got: \"%s\"\n", msg.name);
close(s);
return;
}
getpeercon(s, &source_ctx);
if(memcmp(msg.name,"ctl.",4) == 0) {
// Keep the old close-socket-early behavior when handling
// ctl.* properties.
close(s);
if (check_control_mac_perms(msg.value, source_ctx)) {
#ifdef MTK_INIT
INFO("[PropSet]: pid:%u uid:%u gid:%u %s %s\n", cr.pid, cr.uid, cr.gid, msg.name, msg.value);
#endif
handle_control_message((char*) msg.name + 4, (char*) msg.value);
} else {
ERROR("sys_prop: Unable to %s service ctl [%s] uid:%d gid:%d pid:%d\n",
msg.name + 4, msg.value, cr.uid, cr.gid, cr.pid);
}
} else {
if (check_perms(msg.name, source_ctx)) {
#ifdef MTK_INIT
INFO("[PropSet]: pid:%u uid:%u gid:%u set %s=%s\n", cr.pid, cr.uid, cr.gid, msg.name, msg.value);
if(strcmp(msg.name, ANDROID_RB_PROPERTY) == 0)
{
INFO("pid %d set %s=%s\n", cr.pid, msg.name, msg.value);
reboot_pid(cr.pid);
}
#endif
property_set((char*) msg.name, (char*) msg.value);
} else {
ERROR("sys_prop: permission denied uid:%d name:%s\n",
cr.uid, msg.name);
}
// Note: bionic's property client code assumes that the
// property server will not close the socket until *AFTER*
// the property is written to memory.
close(s);
}
freecon(source_ctx);
break;
default:
close(s);
break;
}
}
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;
}