/**
* Iterates through all rules, and performs an AND between all flags that
* would apply during execution (ie. all rules that have conditions matching
* the hotplug event).
*
* @1 Hotplug event structure
* @2 Rules structure, containing array of rules
*
* Returns: Flags that apply to all matching rules
*/
int flags_eval(struct hotplug2_event_t *event, struct rules_t *rules) {
int flags = FLAG_ALL;
int match = 0;
int i, j;
for (i = 0; i < rules->rules_c; i++) {
match = 1;
for (j = 0; j < rules->rules[i].conditions_c; j++) {
if (rule_condition_eval(event, &rules->rules[i].conditions[j]) != EVAL_MATCH) {
match = 0;
break;
}
}
/*
* Logical AND between flags we've got already and
* those we're adding.
*/
if (match) {
rule_flags(&rules->rules[i]);
flags &= rules->rules[i].flags;
}
}
/*
* A little trick; if no rule matched, we return FLAG_ALL
* and have it skipped completely.
*/
return flags;
}
/**
* Executes a rule. Contains evaluation of all conditions prior
* to execution.
*
* @1 Hotplug event structure
* @2 The rule to be executed
*
* Returns: 0 if success, -1 if the whole event is to be
* discared, 1 if bail out of this particular rule was required
*/
int rule_execute(struct hotplug2_event_t *event, struct rule_t *rule) {
int i, last_rv, res;
char **env;
for (i = 0; i < rule->conditions_c; i++) {
if (rule_condition_eval(event, &(rule->conditions[i])) != EVAL_MATCH)
return 0;
}
res = 0;
last_rv = 0;
env = xmalloc(sizeof(char *) * event->env_vars_c);
for (i = 0; i < event->env_vars_c; i++) {
env[i] = alloc_env(event->env_vars[i].key, event->env_vars[i].value);
putenv(env[i]);
}
for (i = 0; i < rule->actions_c; i++) {
switch (rule->actions[i].type) {
case ACT_STOP_PROCESSING:
res = 1;
break;
case ACT_STOP_IF_FAILED:
if (last_rv != 0)
res = 1;
break;
case ACT_NEXT_EVENT:
res = -1;
break;
case ACT_NEXT_IF_FAILED:
if (last_rv != 0)
res = -1;
break;
case ACT_MAKE_DEVICE:
last_rv = make_dev_from_event(event, rule->actions[i].parameter[0], strtoul(rule->actions[i].parameter[1], NULL, 0));
break;
case ACT_CHMOD:
last_rv = chmod_file(event, rule->actions[i].parameter[0], rule->actions[i].parameter[1]);
break;
case ACT_CHOWN:
case ACT_CHGRP:
last_rv = chown_chgrp(event, rule->actions[i].type, rule->actions[i].parameter[0], rule->actions[i].parameter[1]);
break;
case ACT_SYMLINK:
last_rv = make_symlink(event, rule->actions[i].parameter[0], rule->actions[i].parameter[1]);
break;
case ACT_RUN_SHELL:
last_rv = exec_shell(event, rule->actions[i].parameter[0]);
break;
case ACT_RUN_NOSHELL:
last_rv = exec_noshell(event, rule->actions[i].parameter[0], rule->actions[i].parameter);
break;
case ACT_SETENV:
last_rv = setenv(rule->actions[i].parameter[0], rule->actions[i].parameter[1], 1);
break;
case ACT_REMOVE:
last_rv = unlink(rule->actions[i].parameter[0]);
rmdir_p(rule->actions[i].parameter[0]);
break;
case ACT_DEBUG:
print_debug(event);
last_rv = 0;
break;
}
if (res != 0)
break;
}
for (i = 0; i < event->env_vars_c; i++) {
unsetenv(event->env_vars[i].key);
free(env[i]);
}
free(env);
return res;
}
