init: Add support "&&" operator in property triggers
"&&" operator can now be used to test the validity
of two of more properties.
For example:
on property:test.a=1 && property:test.b=1
setprop test.c 1
The above stub sets the test.c to 1 only when
both test.a=1 and test.b=1
(cherry-pick of 162f7d797c67019a7a3f08c3b0f0ffc91d548ddc.)
Change-Id: I72c19f7aa92231372a416193618ee6c7fd368141
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
diff --git a/init/init.c b/init/init.c
index fef8a2e..d3dd019 100644
--- a/init/init.c
+++ b/init/init.c
@@ -540,17 +540,35 @@
return (list_tail(&act->commands) == &cmd->clist);
}
+
+void build_triggers_string(char *name_str, int length, struct action *cur_action) {
+ struct listnode *node;
+ struct trigger *cur_trigger;
+
+ list_for_each(node, &cur_action->triggers) {
+ cur_trigger = node_to_item(node, struct trigger, nlist);
+ if (node != cur_action->triggers.next) {
+ strlcat(name_str, " " , length);
+ }
+ strlcat(name_str, cur_trigger->name , length);
+ }
+}
+
void execute_one_command(void)
{
int ret, i;
char cmd_str[256] = "";
+ char name_str[256] = "";
if (!cur_action || !cur_command || is_last_command(cur_action, cur_command)) {
cur_action = action_remove_queue_head();
cur_command = NULL;
if (!cur_action)
return;
- INFO("processing action %p (%s)\n", cur_action, cur_action->name);
+
+ build_triggers_string(name_str, sizeof(name_str), cur_action);
+
+ INFO("processing action %p (%s)\n", cur_action, name_str);
cur_command = get_first_command(cur_action);
} else {
cur_command = get_next_command(cur_action, cur_command);
@@ -568,7 +586,7 @@
}
}
INFO("command '%s' action=%s status=%d (%s:%d)\n",
- cmd_str, cur_action ? cur_action->name : "", ret, cur_command->filename,
+ cmd_str, cur_action ? name_str : "", ret, cur_command->filename,
cur_command->line);
}
}
diff --git a/init/init.h b/init/init.h
index a7615a3..e03bd53 100644
--- a/init/init.h
+++ b/init/init.h
@@ -37,6 +37,11 @@
char *args[1];
};
+struct trigger {
+ struct listnode nlist;
+ const char *name;
+};
+
struct action {
/* node in list of all actions */
struct listnode alist;
@@ -46,12 +51,15 @@
struct listnode tlist;
unsigned hash;
- const char *name;
+ /* list of actions which triggers the commands*/
+ struct listnode triggers;
struct listnode commands;
struct command *current;
};
+void build_triggers_string(char *name_str, int length, struct action *cur_action);
+
struct socketinfo {
struct socketinfo *next;
const char *name;
diff --git a/init/init_parser.c b/init/init_parser.c
index 2b4db8e..a124fa2 100644
--- a/init/init_parser.c
+++ b/init/init_parser.c
@@ -499,77 +499,92 @@
void action_for_each_trigger(const char *trigger,
void (*func)(struct action *act))
{
- struct listnode *node;
+ struct listnode *node, *node2;
struct action *act;
+ struct trigger *cur_trigger;
+
list_for_each(node, &action_list) {
act = node_to_item(node, struct action, alist);
- if (!strcmp(act->name, trigger)) {
- func(act);
+ list_for_each(node2, &act->triggers) {
+ cur_trigger = node_to_item(node2, struct trigger, nlist);
+ if (!strcmp(cur_trigger->name, trigger)) {
+ func(act);
+ }
}
}
}
+
void queue_property_triggers(const char *name, const char *value)
{
- struct listnode *node;
+ struct listnode *node, *node2;
struct action *act;
+ struct trigger *cur_trigger;
+ bool match;
+ int name_length;
+
list_for_each(node, &action_list) {
act = node_to_item(node, struct action, alist);
- if (!strncmp(act->name, "property:", strlen("property:"))) {
- const char *test = act->name + strlen("property:");
- int name_length = strlen(name);
+ match = !name;
+ list_for_each(node2, &act->triggers) {
+ cur_trigger = node_to_item(node2, struct trigger, nlist);
+ if (!strncmp(cur_trigger->name, "property:", strlen("property:"))) {
+ const char *test = cur_trigger->name + strlen("property:");
+ if (!match) {
+ name_length = strlen(name);
+ if (!strncmp(name, test, name_length) &&
+ test[name_length] == '=' &&
+ (!strcmp(test + name_length + 1, value) ||
+ !strcmp(test + name_length + 1, "*"))) {
+ match = true;
+ continue;
+ }
+ } else {
+ const char* equals = strchr(test, '=');
+ if (equals) {
+ char prop_name[PROP_NAME_MAX + 1];
+ char value[PROP_VALUE_MAX];
+ int length = equals - test;
+ if (length <= PROP_NAME_MAX) {
+ int ret;
+ memcpy(prop_name, test, length);
+ prop_name[length] = 0;
- if (!strncmp(name, test, name_length) &&
- test[name_length] == '=' &&
- (!strcmp(test + name_length + 1, value) ||
- !strcmp(test + name_length + 1, "*"))) {
- action_add_queue_tail(act);
- }
+ /* does the property exist, and match the trigger value? */
+ ret = property_get(prop_name, value);
+ if (ret > 0 && (!strcmp(equals + 1, value) ||
+ !strcmp(equals + 1, "*"))) {
+ continue;
+ }
+ }
+ }
+ }
+ }
+ match = false;
+ break;
+ }
+ if (match) {
+ action_add_queue_tail(act);
}
}
}
void queue_all_property_triggers()
{
- struct listnode *node;
- struct action *act;
- list_for_each(node, &action_list) {
- act = node_to_item(node, struct action, alist);
- if (!strncmp(act->name, "property:", strlen("property:"))) {
- /* parse property name and value
- syntax is property:<name>=<value> */
- const char* name = act->name + strlen("property:");
- const char* equals = strchr(name, '=');
- if (equals) {
- char prop_name[PROP_NAME_MAX + 1];
- char value[PROP_VALUE_MAX];
- int length = equals - name;
- if (length > PROP_NAME_MAX) {
- ERROR("property name too long in trigger %s", act->name);
- } else {
- int ret;
- memcpy(prop_name, name, length);
- prop_name[length] = 0;
-
- /* does the property exist, and match the trigger value? */
- ret = property_get(prop_name, value);
- if (ret > 0 && (!strcmp(equals + 1, value) ||
- !strcmp(equals + 1, "*"))) {
- action_add_queue_tail(act);
- }
- }
- }
- }
- }
+ queue_property_triggers(NULL, NULL);
}
void queue_builtin_action(int (*func)(int nargs, char **args), char *name)
{
struct action *act;
struct command *cmd;
+ struct trigger *cur_trigger;
act = calloc(1, sizeof(*act));
- act->name = name;
+ cur_trigger = calloc(1, sizeof(*cur_trigger));
+ cur_trigger->name = name;
+ list_init(&act->triggers);
+ list_add_tail(&act->triggers, &cur_trigger->nlist);
list_init(&act->commands);
list_init(&act->qlist);
@@ -611,6 +626,7 @@
static void *parse_service(struct parse_state *state, int nargs, char **args)
{
struct service *svc;
+ struct trigger *cur_trigger;
if (nargs < 3) {
parse_error(state, "services must have a name and a program\n");
return 0;
@@ -635,9 +651,12 @@
svc->name = args[1];
svc->classname = "default";
memcpy(svc->args, args + 2, sizeof(char*) * nargs);
+ cur_trigger = calloc(1, sizeof(*cur_trigger));
svc->args[nargs] = 0;
svc->nargs = nargs;
- svc->onrestart.name = "onrestart";
+ list_init(&svc->onrestart.triggers);
+ cur_trigger->name = "onrestart";
+ list_add_tail(&svc->onrestart.triggers, &cur_trigger->nlist);
list_init(&svc->onrestart.commands);
list_add_tail(&service_list, &svc->slist);
return svc;
@@ -821,16 +840,29 @@
static void *parse_action(struct parse_state *state, int nargs, char **args)
{
struct action *act;
+ struct trigger *cur_trigger;
+ int i;
if (nargs < 2) {
parse_error(state, "actions must have a trigger\n");
return 0;
}
- if (nargs > 2) {
- parse_error(state, "actions may not have extra parameters\n");
- return 0;
- }
+
act = calloc(1, sizeof(*act));
- act->name = args[1];
+ list_init(&act->triggers);
+
+ for (i = 1; i < nargs; i++) {
+ if (!(i % 2)) {
+ if (strcmp(args[i], "&&")) {
+ parse_error(state, "& is the only symbol allowed to concatenate actions\n");
+ return 0;
+ } else
+ continue;
+ }
+ cur_trigger = calloc(1, sizeof(*cur_trigger));
+ cur_trigger->name = args[i];
+ list_add_tail(&act->triggers, &cur_trigger->nlist);
+ }
+
list_init(&act->commands);
list_init(&act->qlist);
list_add_tail(&action_list, &act->alist);
diff --git a/init/parser.c b/init/parser.c
index 48e7aec..80bfb09 100644
--- a/init/parser.c
+++ b/init/parser.c
@@ -15,9 +15,10 @@
struct command *cmd;
struct listnode *node;
struct listnode *node2;
+ char name_str[256] = "";
struct socketinfo *si;
int n;
-
+
list_for_each(node, &service_list) {
svc = node_to_item(node, struct service, slist);
RAW("service %s\n", svc->name);
@@ -34,7 +35,11 @@
list_for_each(node, &action_list) {
act = node_to_item(node, struct action, alist);
- RAW("on %s\n", act->name);
+ RAW("on ");
+ build_triggers_string(name_str, sizeof(name_str), act);
+ RAW("%s", name_str);
+ RAW("\n");
+
list_for_each(node2, &act->commands) {
cmd = node_to_item(node2, struct command, clist);
RAW(" %p", cmd->func);
diff --git a/init/readme.txt b/init/readme.txt
index 750d953..0b43fd5 100644
--- a/init/readme.txt
+++ b/init/readme.txt
@@ -123,6 +123,15 @@
Triggers of this form occur when the property <name> is set
to the specific value <value>.
+ One can also test Mutliple properties to execute a group
+ of commands. For example:
+
+ on property:test.a=1 && property:test.b=1
+ setprop test.c 1
+
+ The above stub sets test.c to 1 only when
+ both test.a=1 and test.b=1
+
Commands
--------