int 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*) __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);
}
property_changed(name, value);
return 0;
}
static void refresh_cache(struct cache *cache, const char *key)
{
uint32_t serial;
char buf[PROP_VALUE_MAX];
if (!cache->pinfo) {
cache->pinfo = __system_property_find(key);
if (!cache->pinfo) {
return;
}
cache->serial = -1;
}
serial = __system_property_serial(cache->pinfo);
if (serial == cache->serial) {
return;
}
cache->serial = serial;
__system_property_read(cache->pinfo, 0, buf);
switch(buf[0]) {
case 't': case 'T':
cache->c = strcasecmp(buf + 1, "rue") ? buf[0] : BOOLEAN_TRUE;
break;
case 'f': case 'F':
cache->c = strcasecmp(buf + 1, "alse") ? buf[0] : BOOLEAN_FALSE;
break;
default:
cache->c = buf[0];
}
}
/* first, set it in our memory, then in init'd memory */
static int property_set_ex(const char *name, const char *value, int mem, mapinfo *mi)
{
void *pi;
int namelen = strlen(name);
int valuelen = strlen(value);
if(namelen >= PROP_NAME_MAX) {
LOGE("name too long!");
return -1;
}
if(valuelen >= PROP_VALUE_MAX) {
LOGE("value too long!");
return -1;
}
if(namelen < 1) {
LOGE("name too short!");
return -1;
}
pi = (void *)__system_property_find(name);
if(pi != 0) {
char *pa = (char *)__system_property_area__;
if (compat_mode)
update_prop_info_compat(mi, pa, pi, value, valuelen);
else
update_prop_info(mi, pa, pi, value, valuelen);
return 0;
}
return -1;
}
static void BM_property_serial(int iters, int nprops)
{
StopBenchmarkTiming();
LocalPropertyTestState pa(nprops);
if (!pa.valid)
return;
srandom(iters * nprops);
const prop_info** pinfo = new const prop_info*[iters];
for (int i = 0; i < iters; i++) {
pinfo[i] = __system_property_find(pa.names[random() % nprops]);
}
// StartBenchmarkTiming();
for (int i = 0; i < iters; i++) {
StartBenchmarkTiming();
__system_property_serial(pinfo[i]);
StopBenchmarkTimingWithStd();
}
// StopBenchmarkTiming();
delete[] pinfo;
}
TEST(properties, wait) {
#if defined(__BIONIC__)
LocalPropertyTestState pa;
ASSERT_TRUE(pa.valid);
unsigned int serial;
prop_info *pi;
pthread_t t;
int flag = 0;
ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
serial = __system_property_wait_any(0);
pi = (prop_info *)__system_property_find("property");
ASSERT_NE((prop_info *)NULL, pi);
__system_property_update(pi, "value2", 6);
serial = __system_property_wait_any(serial);
ASSERT_EQ(0, pthread_create(&t, NULL, PropertyWaitHelperFn, &flag));
ASSERT_EQ(flag, 0);
serial = __system_property_wait_any(serial);
ASSERT_EQ(flag, 1);
void* result;
ASSERT_EQ(0, pthread_join(t, &result));
#else // __BIONIC__
GTEST_LOG_(INFO) << "This test does nothing.\n";
#endif // __BIONIC__
}
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;
}
int __system_property_get(const char *name, char *value)
{
const prop_info *pi = __system_property_find(name);
if (pi != 0) {
return __system_property_read(pi, 0, value);
} else {
value[0] = 0;
return 0;
}
}
static void *PropertyWaitHelperFn(void *arg) {
int *flag = (int *)arg;
prop_info *pi;
pi = (prop_info *)__system_property_find("property");
usleep(100000);
*flag = 1;
__system_property_update(pi, "value3", 6);
return NULL;
}
static void refresh_cache_property(struct cache_property* cache, const char* key)
{
if (!cache->cache.pinfo) {
cache->cache.pinfo = __system_property_find(key);
if (!cache->cache.pinfo) {
return;
}
}
cache->cache.serial = __system_property_serial(cache->cache.pinfo);
__system_property_read(cache->cache.pinfo, 0, cache->property);
}
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, 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*) __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 (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;
}
const char* property_get(const char *name)
{
prop_area *pa;
const prop_info *pi;
int len = 0;
pi =__system_property_find(name);
if(pi != 0) {
return pi->value;
} else {
return 0;
}
}
const char* property_get(const char *name)
{
prop_info *pi;
if(strlen(name) >= PROP_NAME_MAX) return 0;
pi = (prop_info*) __system_property_find(name);
if(pi != 0) {
return pi->value;
} else {
return 0;
}
}
TEST(properties, update) {
#if defined(__BIONIC__)
LocalPropertyTestState pa;
ASSERT_TRUE(pa.valid);
char propvalue[PROP_VALUE_MAX];
prop_info *pi;
ASSERT_EQ(0, __system_property_add("property", 8, "oldvalue1", 9));
ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
pi = (prop_info *)__system_property_find("property");
ASSERT_NE((prop_info *)NULL, pi);
__system_property_update(pi, "value4", 6);
pi = (prop_info *)__system_property_find("other_property");
ASSERT_NE((prop_info *)NULL, pi);
__system_property_update(pi, "newvalue5", 9);
pi = (prop_info *)__system_property_find("property_other");
ASSERT_NE((prop_info *)NULL, pi);
__system_property_update(pi, "value6", 6);
ASSERT_EQ(6, __system_property_get("property", propvalue));
ASSERT_STREQ(propvalue, "value4");
ASSERT_EQ(9, __system_property_get("other_property", propvalue));
ASSERT_STREQ(propvalue, "newvalue5");
ASSERT_EQ(6, __system_property_get("property_other", propvalue));
ASSERT_STREQ(propvalue, "value6");
#else // __BIONIC__
GTEST_LOG_(INFO) << "This test does nothing.\n";
#endif // __BIONIC__
}
TEST(properties, serial) {
#if defined(__BIONIC__)
LocalPropertyTestState pa;
ASSERT_TRUE(pa.valid);
const prop_info *pi;
unsigned int serial;
ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
ASSERT_NE((const prop_info *)NULL, pi = __system_property_find("property"));
serial = __system_property_serial(pi);
ASSERT_EQ(0, __system_property_update((prop_info *)pi, "value2", 6));
ASSERT_NE(serial, __system_property_serial(pi));
#else // __BIONIC__
GTEST_LOG_(INFO) << "This test does nothing.\n";
#endif // __BIONIC__
}
static _res_thread*
_res_thread_alloc(void)
{
_res_thread* rt = calloc(1, sizeof(*rt));
if (rt) {
rt->_h_errno = 0;
/* Special system property which tracks any changes to 'net.*'. */
rt->_serial = 0;
rt->_pi = (struct prop_info*) __system_property_find("net.change");
if (rt->_pi) {
rt->_serial = rt->_pi->serial;
}
memset(rt->_rstatic, 0, sizeof rt->_rstatic);
}
return rt;
}
int wifi_stop_supplicant()
{
char supp_status[PROPERTY_VALUE_MAX] = {'\0'};
int count = 50; /* wait at most 5 seconds for completion */
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES
char supp_rdy_status[PROPERTY_VALUE_MAX] = "";
const prop_info *rdy_pi = NULL;
int rdy_loop_count = 0;
#endif
/* Check whether supplicant already stopped */
if (property_get(supplicant_prop_name, supp_status, NULL)
&& strcmp(supp_status, "stopped") == 0) {
return 0;
}
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES
/* Wait for the supplicant to deinitialize and set the
property (SUPP_RDY_PROP_NAME) to 0 before killing
the supplicant */
for (rdy_loop_count = 0; rdy_loop_count < 15000/RDY_WAIT_MS;
rdy_loop_count ++) {
if (rdy_pi == NULL) {
rdy_pi = __system_property_find(SUPP_RDY_PROP_NAME);
} else {
__system_property_read(rdy_pi, NULL, supp_rdy_status);
if (strcmp(supp_rdy_status, "0") == 0)
{
break;
}
}
usleep (RDY_WAIT_MS * 1000);
}
#endif
property_set("ctl.stop", supplicant_name);
sched_yield();
while (count-- > 0) {
if (property_get(supplicant_prop_name, supp_status, NULL)) {
if (strcmp(supp_status, "stopped") == 0)
return 0;
}
usleep(100000);
}
return -1;
}
static void refresh_cache(struct cache *cache, const char *key)
{
uint32_t serial;
char buf[PROP_VALUE_MAX];
if (!cache->pinfo) {
cache->pinfo = __system_property_find(key);
if (!cache->pinfo) {
return;
}
}
serial = __system_property_serial(cache->pinfo);
if (serial == cache->serial) {
return;
}
cache->serial = serial;
__system_property_read(cache->pinfo, 0, buf);
cache->c = buf[0];
}
static _res_thread*
_res_thread_alloc(void)
{
_res_thread* rt = calloc(1, sizeof(*rt));
if (rt) {
rt->_h_errno = 0;
/* Special system property which tracks any changes to 'net.*'. */
rt->_serial = 0;
#if defined(PROPERTY_SYSTEM_SUPPORT)
rt->_pi = (struct prop_info*) __system_property_find("net.change");
if (rt->_pi) {
rt->_serial = __system_property_serial(rt->_pi);
}
#endif
memset(rt->_rstatic, 0, sizeof rt->_rstatic);
}
return rt;
}
TEST(properties, errors) {
#if defined(__BIONIC__)
LocalPropertyTestState pa;
ASSERT_TRUE(pa.valid);
char prop_value[PROP_NAME_MAX];
ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
ASSERT_EQ(0, __system_property_find("property1"));
ASSERT_EQ(0, __system_property_get("property1", prop_value));
ASSERT_EQ(-1, __system_property_add("name", PROP_NAME_MAX, "value", 5));
ASSERT_EQ(-1, __system_property_add("name", 4, "value", PROP_VALUE_MAX));
ASSERT_EQ(-1, __system_property_update(NULL, "value", PROP_VALUE_MAX));
#else // __BIONIC__
GTEST_LOG_(INFO) << "This test does nothing.\n";
#endif // __BIONIC__
}
static void BM_property_find(int iters, int nprops)
{
StopBenchmarkTiming();
LocalPropertyTestState pa(nprops);
if (!pa.valid)
return;
srandom(iters * nprops);
// StartBenchmarkTiming();
for (int i = 0; i < iters; i++) {
StartBenchmarkTiming();
__system_property_find(pa.names[random() % nprops]);
StopBenchmarkTimingWithStd();
}
// StopBenchmarkTiming();
}
int __system_properties_init(void)
{
prop_area *pa;
int fd;
unsigned sz;
char *env;
if(__system_property_area__ != ((void*) &dummy_props)) {
return 0;
}
env = getenv("ANDROID_PROPERTY_WORKSPACE");
if (!env) {
return -1;
}
fd = atoi(env);
env = strchr(env, ',');
if (!env) {
return -1;
}
sz = atoi(env + 1);
pa = mmap(0, sz, PROT_READ, MAP_SHARED, fd, 0);
if(pa == MAP_FAILED) {
return -1;
}
if((pa->magic != PROP_AREA_MAGIC) || (pa->version != PROP_AREA_VERSION)) {
munmap(pa, sz);
return -1;
}
__system_property_area__ = pa;
if (0 < pa->count)
{
/*
* Yes - this is C. I like it, but it may have bugs :)
* Search the longest value in the /system/build.prop
* and /system/default.prop files with a name that starts
* with "ro." in order to search this read-only property to
* determine PROP_NAME_MAX later on.
*/
int prop;
int minlen = 8;
char name[PROP_NAME_LIMIT];
char value[PROP_VALUE_MAX];
for (prop = 0; prop < 2; prop++) {
FILE* f = fopen(prop ? PROP_PATH_SYSTEM_BUILD : PROP_PATH_SYSTEM_DEFAULT, "r");
if (f)
{
char s[32 + PROP_NAME_LIMIT + PROP_VALUE_MAX];
while (fgets(s, sizeof(s), f))
{
char* p = s;
while (sizeof(s) > p - s && (' ' == *p || '\t' == *p)) p++;
if (sizeof(s) > p - s && 0 == strncmp(p, "ro.", 3))
{
char* n = p;
while (sizeof(s) > p - s && 0 != *p && '=' != *p && ' ' != *p && '\t' != *p) p++;
if (sizeof(s) > p - s && 0 != *p)
{
char* nend = p;
while (sizeof(s) > p - s && 0 != *p && '=' != *p) p++;
if (sizeof(s) > p - s && '=' == *p)
{
char *v;
*nend = 0;
p++;
while (sizeof(s) > p - s && (' ' == *p || '\t' == *p)) p++;
v = p;
while (sizeof(s) > p - s && (' ' <= *p)) p++;
if (sizeof(s) > p - s)
{
char *vend = p;
*vend = 0;
if (sizeof(name) > nend - n && sizeof(value) > vend - v && minlen < vend - v)
{
minlen = vend - v;
strcpy(name, n);
strcpy(value, v);
}
}
}
}
}
}
fclose(f);
}
}
if (8 < minlen)
{
const prop_info *pi = __system_property_find(name);
if (0 != pi)
{
int m = PROP_NAME_MAX;
while(m <= PROP_NAME_LIMIT)
{
if (0 == strcmp(pi->value + (m - PROP_NAME_MAX), value))
{
prop_name_max = m;
break;
}
m++;
}
}
}
}
return 0;
}
int start_supplicant(const struct _SUPPLICANT_PARA_T * prTar, const char *pcIface)
{
char daemon_cmd[PROPERTY_VALUE_MAX];
char supp_status[PROPERTY_VALUE_MAX] = {'\0'};
int count = 200; /* wait at most 20 seconds for completion */
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES
const prop_info *pi;
unsigned serial = 0;
#endif
/* Check whether already running */
if (property_get(prTar->acSuppPropName, supp_status, NULL)
&& strcmp(supp_status, "running") == 0) {
return 0;
}
/* Before starting the daemon, make sure its config file exists */
if (ensure_config_file_exists(prTar->acSuppConfigFile, prTar->acSuppConfigTemplate) < 0) {
LOGE("[%s] %s will not be enabled", pcIface, prTar->acSuppName);
return -1;
}
/*Set interface UP (ifconfig "iface" up)*/
if(set_iface(pcIface, 1) < 0 ) {
/*If interface up failed, skip the following actions*/
return -1;
}
/* Clear out any stale socket files that might be left over. */
LOGD("[%s] clear out stale sockets with prefix \"%s\" in %s", pcIface, prTar->acSuppCtrlPrefix, CONFIG_CTRL_IFACE_CLIENT_DIR);
ctrl_cleanup(prTar->acSuppCtrlPrefix);
LOGI("[%s] start %s", pcIface, prTar->acSuppName);
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES
/*
* Get a reference to the status property, so we can distinguish
* the case where it goes stopped => running => stopped (i.e.,
* it start up, but fails right away) from the case in which
* it starts in the stopped state and never manages to start
* running at all.
*/
pi = __system_property_find(prTar->acSuppPropName);
if (pi != NULL) {
serial = pi->serial;
}
#endif
property_get(prTar->acIfPropName, (char *)pcIface, prTar->acIfDefName);
snprintf(daemon_cmd, PROPERTY_VALUE_MAX, prTar->acSuppDeamonCmd, prTar->acSuppName, pcIface, prTar->acSuppConfigFile);
property_set("ctl.start", daemon_cmd);
LOGD("[%s] supplicant start command: \"%s\"", pcIface, daemon_cmd);
//property_set("ctl.start", prTar->acSuppName);
sched_yield();
while (count-- > 0) {
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES
if (pi == NULL) {
pi = __system_property_find(prTar->acSuppPropName);
}
if (pi != NULL) {
__system_property_read(pi, NULL, supp_status);
if (strcmp(supp_status, "running") == 0) {
return 0;
} else if (pi->serial != serial &&
strcmp(supp_status, "stopped") == 0) {
return -1;
}
}
#else
if (property_get(prTar->acSuppPropName, supp_status, NULL)) {
if (strcmp(supp_status, "running") == 0)
return 0;
}
#endif
usleep(100000);
}
return -1;
}
static _res_thread*
_res_thread_get(void)
{
_res_thread* rt;
pthread_once( &_res_once, _res_init_key );
rt = pthread_getspecific( _res_key );
if (rt != NULL) {
/* We already have one thread-specific DNS state object.
* Check the serial value for any changes to net.* properties */
D("%s: Called for tid=%d rt=%p rt->pi=%p rt->serial=%d",
__FUNCTION__, gettid(), rt, rt->_pi, rt->_serial);
if (rt->_pi == NULL) {
/* The property wasn't created when _res_thread_get() was
* called the last time. This should only happen very
* early during the boot sequence. First, let's try to see if it
* is here now. */
rt->_pi = (struct prop_info*) __system_property_find("net.change");
if (rt->_pi == NULL) {
/* Still nothing, return current state */
D("%s: exiting for tid=%d rt=%d since system property not found",
__FUNCTION__, gettid(), rt);
return rt;
}
}
if (rt->_serial == rt->_pi->serial) {
/* Nothing changed, so return the current state */
D("%s: tid=%d rt=%p nothing changed, returning",
__FUNCTION__, gettid(), rt);
return rt;
}
/* Update the recorded serial number, and go reset the state */
rt->_serial = rt->_pi->serial;
goto RESET_STATE;
}
/* It is the first time this function is called in this thread,
* we need to create a new thread-specific DNS resolver state. */
rt = _res_thread_alloc();
if (rt == NULL) {
return NULL;
}
pthread_setspecific( _res_key, rt );
D("%s: tid=%d Created new DNS state rt=%p",
__FUNCTION__, gettid(), rt);
RESET_STATE:
/* Reset the state, note that res_ninit() can now properly reset
* an existing state without leaking memory.
*/
D("%s: tid=%d, rt=%p, resetting DNS state (options RES_INIT=%d)",
__FUNCTION__, gettid(), rt, (rt->_nres->options & RES_INIT) != 0);
if ( res_ninit( rt->_nres ) < 0 ) {
/* This should not happen */
D("%s: tid=%d rt=%p, woot, res_ninit() returned < 0",
__FUNCTION__, gettid(), rt);
_res_thread_free(rt);
pthread_setspecific( _res_key, NULL );
return NULL;
}
return rt;
}
int
getprop_main(const struct cmd_getprop_info* info)
{
const char* format = info->getprop.format;
const char* format_not_found = info->getprop.format_not_found;
bool null = info->getprop.null;
if (null && format == NULL && format_not_found == NULL)
usage_error("must supply --format or "
"--format-not-found or both if using -0");
find_symbol_in_libc("__system_property_foreach",
&property_foreach);
if (property_foreach == NULL)
property_foreach = compat_property_foreach;
dbg("using %s for property enumeration",
property_foreach == compat_property_foreach
? "compat_property_foreach"
: "__system_property_foreach");
int exit_status = 0;
struct json_writer* writer = NULL;
if (format == NULL && format_not_found == NULL) {
writer = json_writer_create(xstdout);
json_begin_object(writer);
}
const char** properties = ARGV_CONCAT(info->properties);
bool first = true;
char sep = null ? '\0' : '\n';
if (*properties == NULL) {
struct property_vector* pv = find_all_properties();
char prev_name[PROP_NAME_MAX];
for (size_t i = 0; i < pv->size; ++i) {
char name[PROP_NAME_MAX];
char value[PROP_VALUE_MAX];
(void) __system_property_read(pv->props[i], name, value);
if (i > 0 && strcmp(name, prev_name) == 0)
continue;
if (writer != NULL) {
json_begin_field(writer, name);
json_emit_string(writer, value);
} else {
output_property(&first, sep, format, name, value);
}
strcpy(prev_name, name);
}
} else {
size_t nproperties = argv_count(properties);
qsort(properties,
nproperties,
sizeof (properties[0]),
property_argv_compare);
const char* property;
const char* prev_property = NULL;
while ((property = *properties++)) {
if (prev_property != NULL && !strcmp(prev_property, property))
continue;
if (writer != NULL)
json_begin_field(writer, property);
const prop_info* pi = __system_property_find(property);
if (pi) {
char value[PROP_VALUE_MAX];
__system_property_read(pi, NULL, value);
if (writer != NULL)
json_emit_string(writer, value);
else if (format != NULL)
output_property(&first, sep, format, property, value);
} else {
if (writer != NULL)
json_emit_null(writer);
else if (format_not_found != NULL)
output_property(&first, sep,
format_not_found,
property, NULL);
exit_status = 4;
}
prev_property = property;
}
}
if (writer == NULL && !first && !null)
xputc(sep, xstdout);
if (writer != NULL)
json_end_object(writer);
xflush(xstdout);
return exit_status;
}
int wifi_start_supplicant()
{
char supp_status[PROPERTY_VALUE_MAX] = {'\0'};
int count = 200; /* wait at most 20 seconds for completion */
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES
const prop_info *pi;
unsigned serial = 0;
#endif
/* Check whether already running */
if (property_get(SUPP_PROP_NAME, supp_status, NULL)
&& strcmp(supp_status, "running") == 0) {
return 0;
}
/* Before starting the daemon, make sure its config file exists */
if (ensure_config_file_exists() < 0) {
LOGE("Wi-Fi will not be enabled");
return -1;
}
/* Clear out any stale socket files that might be left over. */
wpa_ctrl_cleanup();
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES
/*
* Get a reference to the status property, so we can distinguish
* the case where it goes stopped => running => stopped (i.e.,
* it start up, but fails right away) from the case in which
* it starts in the stopped state and never manages to start
* running at all.
*/
pi = __system_property_find(SUPP_PROP_NAME);
if (pi != NULL) {
serial = pi->serial;
}
#endif
/* The ar6k driver needs the interface up in order to scan! */
if (!strncmp(DRIVER_MODULE_NAME, "ar6000", 6)) {
ifc_init();
ifc_up("wlan0");
sleep(1);
}
property_set("ctl.start", SUPPLICANT_NAME);
sched_yield();
while (count-- > 0) {
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES
if (pi == NULL) {
pi = __system_property_find(SUPP_PROP_NAME);
}
if (pi != NULL) {
__system_property_read(pi, NULL, supp_status);
if (strcmp(supp_status, "running") == 0) {
return 0;
} else if (pi->serial != serial &&
strcmp(supp_status, "stopped") == 0) {
return -1;
}
}
#else
if (property_get(SUPP_PROP_NAME, supp_status, NULL)) {
if (strcmp(supp_status, "running") == 0)
return 0;
}
#endif
usleep(100000);
}
return -1;
}
int wifi_start_supplicant(int p2p_supported)
{
char supp_status[PROPERTY_VALUE_MAX] = {'\0'};
int count = 200; /* wait at most 20 seconds for completion */
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES
const prop_info *pi;
unsigned serial = 0, i;
#endif
if (p2p_supported) {
strcpy(supplicant_name, P2P_SUPPLICANT_NAME);
strcpy(supplicant_prop_name, P2P_PROP_NAME);
/* Ensure p2p config file is created */
if (ensure_config_file_exists(P2P_CONFIG_FILE) < 0) {
ALOGE("Failed to create a p2p config file");
return -1;
}
} else {
strcpy(supplicant_name, SUPPLICANT_NAME);
strcpy(supplicant_prop_name, SUPP_PROP_NAME);
}
/* Check whether already running */
if (property_get(supplicant_prop_name, supp_status, NULL)
&& strcmp(supp_status, "running") == 0) {
return 0;
}
/* Before starting the daemon, make sure its config file exists */
if (ensure_config_file_exists(SUPP_CONFIG_FILE) < 0) {
ALOGE("Wi-Fi will not be enabled");
return -1;
}
if (ensure_entropy_file_exists() < 0) {
ALOGE("Wi-Fi entropy file was not created");
}
/* Clear out any stale socket files that might be left over. */
wpa_ctrl_cleanup();
/* Reset sockets used for exiting from hung state */
exit_sockets[0] = exit_sockets[1] = -1;
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES
/*
* Get a reference to the status property, so we can distinguish
* the case where it goes stopped => running => stopped (i.e.,
* it start up, but fails right away) from the case in which
* it starts in the stopped state and never manages to start
* running at all.
*/
pi = __system_property_find(supplicant_prop_name);
if (pi != NULL) {
serial = __system_property_serial(pi);
}
#endif
property_get("wifi.interface", primary_iface, WIFI_TEST_INTERFACE);
property_set("ctl.start", supplicant_name);
sched_yield();
while (count-- > 0) {
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES
if (pi == NULL) {
pi = __system_property_find(supplicant_prop_name);
}
if (pi != NULL) {
/*
* property serial updated means that init process is scheduled
* after we sched_yield, further property status checking is based on this */
if (__system_property_serial(pi) != serial) {
__system_property_read(pi, NULL, supp_status);
if (strcmp(supp_status, "running") == 0) {
return 0;
} else if (strcmp(supp_status, "stopped") == 0) {
return -1;
}
}
}
#else
if (property_get(supplicant_prop_name, supp_status, NULL)) {
if (strcmp(supp_status, "running") == 0)
return 0;
}
#endif
usleep(100000);
}
return -1;
}
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;
}
int wifi_start_supplicant_common(const char *config_file)
{
char daemon_cmd[PROPERTY_VALUE_MAX];
char supp_status[PROPERTY_VALUE_MAX] = {'\0'};
int count = 200; /* wait at most 20 seconds for completion */
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES
const prop_info *pi;
unsigned serial = 0;
#endif
/* Check whether already running */
if (property_get(SUPP_PROP_NAME, supp_status, NULL)
&& strcmp(supp_status, "running") == 0) {
return 0;
}
/* Before starting the daemon, make sure its config file exists */
if (ensure_config_file_exists(config_file) < 0) {
LOGE("Wi-Fi will not be enabled");
return -1;
}
if (ensure_entropy_file_exists() < 0) {
LOGE("Wi-Fi entropy file was not created");
}
/* Clear out any stale socket files that might be left over. */
wifi_wpa_ctrl_cleanup();
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES
/*
* Get a reference to the status property, so we can distinguish
* the case where it goes stopped => running => stopped (i.e.,
* it start up, but fails right away) from the case in which
* it starts in the stopped state and never manages to start
* running at all.
*/
pi = __system_property_find(SUPP_PROP_NAME);
if (pi != NULL) {
serial = pi->serial;
}
#endif
property_get("wifi.interface", iface, WIFI_TEST_INTERFACE);
snprintf(daemon_cmd, PROPERTY_VALUE_MAX, "%s:-i%s -c%s", SUPPLICANT_NAME, iface, config_file);
property_set("ctl.start", daemon_cmd);
sched_yield();
while (count-- > 0) {
#ifdef HAVE_LIBC_SYSTEM_PROPERTIES
if (pi == NULL) {
pi = __system_property_find(SUPP_PROP_NAME);
}
if (pi != NULL) {
__system_property_read(pi, NULL, supp_status);
if (strcmp(supp_status, "running") == 0) {
return 0;
} else if (pi->serial != serial &&
strcmp(supp_status, "stopped") == 0) {
return -1;
}
}
#else
if (property_get(SUPP_PROP_NAME, supp_status, NULL)) {
if (strcmp(supp_status, "running") == 0)
return 0;
}
#endif
usleep(100000);
}
return -1;
}