void infologger(void) {
cp_context_t *ctx;
cp_plugin_info_t *plugin;
cp_status_t status;
struct log_count_t lc = { CP_LOG_INFO, 0, 0 };
ctx = init_context(CP_LOG_WARNING, NULL);
check(cp_register_logger(ctx, counting_logger, &lc, CP_LOG_INFO) == CP_OK);
check((plugin = cp_load_plugin_descriptor(ctx, plugindir("minimal"), &status)) != NULL && status == CP_OK);
check(cp_install_plugin(ctx, plugin) == CP_OK);
cp_release_info(ctx, plugin);
cp_destroy();
check(lc.count_max > 0 && lc.count_above_max == 0);
}
void twologgers(void) {
cp_context_t *ctx;
cp_plugin_info_t *plugin;
cp_status_t status;
struct log_count_t lc = { CP_LOG_DEBUG, 0, 0 };
int count = 0;
int errors;
ctx = init_context(CP_LOG_ERROR, &errors);
check(cp_register_logger(ctx, counting_logger, &lc, CP_LOG_DEBUG) == CP_OK);
check(count == 0 && lc.count_max > 0 && lc.count_above_max == 0);
check(cp_register_logger(ctx, increment_logger, &count, CP_LOG_INFO) == CP_OK);
check(count == 0 && lc.count_max > 0 && lc.count_above_max == 0);
check((plugin = cp_load_plugin_descriptor(ctx, plugindir("minimal"), &status)) != NULL && status == CP_OK);
check(cp_install_plugin(ctx, plugin) == CP_OK);
cp_release_info(ctx, plugin);
check(count > 0 && lc.count_max > 0 && lc.count_above_max > 0);
cp_destroy();
check(errors == 0);
}
void plugincallbacks(void) {
cp_context_t *ctx;
cp_status_t status;
cp_plugin_info_t *plugin;
int errors;
cbc_counters_t *counters;
ctx = init_context(CP_LOG_ERROR, &errors);
cp_set_context_args(ctx, argv);
check((plugin = cp_load_plugin_descriptor(ctx, "tmp/install/plugins/callbackcounter", &status)) != NULL && status == CP_OK);
check(cp_install_plugin(ctx, plugin) == CP_OK);
cp_release_info(ctx, plugin);
// Start plug-in implicitly by resolving a symbol
check((counters = cp_resolve_symbol(ctx, "callbackcounter", "cbc_counters", &status)) != NULL && status == CP_OK);
check(counters->create == 1);
check(counters->start == 1);
check(counters->logger == 0);
check(counters->listener == 1);
check(counters->run == 0);
check(counters->stop == 0);
check(counters->destroy == 0);
check(counters->context_arg_0 != NULL && strcmp(counters->context_arg_0, argv[0]) == 0);
// Cause warning
check(cp_start_plugin(ctx, "nonexisting") == CP_ERR_UNKNOWN);
check(counters->create == 1);
check(counters->start == 1);
check(counters->logger == 1);
check(counters->listener == 1);
check(counters->run == 0);
check(counters->stop == 0);
check(counters->destroy == 0);
// Run run function once
check(cp_run_plugins_step(ctx));
check(counters->create == 1);
check(counters->start == 1);
check(counters->logger == 1);
check(counters->listener == 1);
check(counters->run == 1);
check(counters->stop == 0);
check(counters->destroy == 0);
// Run run function until no more work to be done (run = 3)
cp_run_plugins(ctx);
check(counters->create == 1);
check(counters->start == 1);
check(counters->logger == 1);
check(counters->listener == 1);
check(counters->run == 3);
check(counters->stop == 0);
check(counters->destroy == 0);
/*
* Normally symbols must not be accessed after they have been released.
* We still access counters here because we know that the plug-in
* implementation does not free the counter data.
*/
cp_release_symbol(ctx, counters);
// Stop plug-in
check(cp_stop_plugin(ctx, "callbackcounter") == CP_OK);
check(counters->create == 1);
check(counters->start == 1);
check(counters->logger == 1);
check(counters->listener == 2);
check(counters->run == 3);
check(counters->stop == 1);
// for now 1 but might be 0 in future (delay destroy)
check(counters->destroy == 0 || counters->destroy == 1);
// Uninstall plugin
check(cp_uninstall_plugin(ctx, "callbackcounter") == CP_OK);
check(counters->create == 1);
check(counters->start == 1);
check(counters->logger == 1);
check(counters->listener == 2);
check(counters->run == 3);
check(counters->stop == 1);
check(counters->destroy == 1);
cp_destroy();
check(errors == 0);
/* Free the counter data that was intentionally leaked by the plug-in */
free(counters);
}
CP_C_API cp_status_t cp_scan_plugins(cp_context_t *context, int flags) {
hash_t *avail_plugins = NULL;
list_t *started_plugins = NULL;
cp_plugin_info_t **plugins = NULL;
char *pdir_path = NULL;
int pdir_path_size = 0;
int plugins_stopped = 0;
cp_status_t status = CP_OK;
CHECK_NOT_NULL(context);
cpi_lock_context(context);
cpi_check_invocation(context, CPI_CF_ANY, __func__);
cpi_debug(context, N_("Plug-in scan is starting."));
do {
lnode_t *lnode;
hscan_t hscan;
hnode_t *hnode;
// Create a hash for available plug-ins
if ((avail_plugins = hash_create(HASHCOUNT_T_MAX, (int (*)(const void *, const void *)) strcmp, NULL)) == NULL) {
status = CP_ERR_RESOURCE;
break;
}
// Scan plug-in directories for available plug-ins
lnode = list_first(context->env->plugin_dirs);
while (lnode != NULL) {
const char *dir_path;
DIR *dir;
dir_path = lnode_get(lnode);
dir = opendir(dir_path);
if (dir != NULL) {
int dir_path_len;
struct dirent *de;
dir_path_len = strlen(dir_path);
if (dir_path[dir_path_len - 1] == CP_FNAMESEP_CHAR) {
dir_path_len--;
}
errno = 0;
while ((de = readdir(dir)) != NULL) {
if (de->d_name[0] != '\0' && de->d_name[0] != '.') {
int pdir_path_len = dir_path_len + 1 + strlen(de->d_name) + 1;
cp_plugin_info_t *plugin;
cp_status_t s;
hnode_t *hnode;
// Allocate memory for plug-in descriptor path
if (pdir_path_size <= pdir_path_len) {
char *new_pdir_path;
if (pdir_path_size == 0) {
pdir_path_size = 128;
}
while (pdir_path_size <= pdir_path_len) {
pdir_path_size *= 2;
}
new_pdir_path = realloc(pdir_path, pdir_path_size * sizeof(char));
if (new_pdir_path == NULL) {
cpi_errorf(context, N_("Could not check possible plug-in location %s%c%s due to insufficient system resources."), dir_path, CP_FNAMESEP_CHAR, de->d_name);
status = CP_ERR_RESOURCE;
// continue loading plug-ins from other directories
continue;
}
pdir_path = new_pdir_path;
}
// Construct plug-in descriptor path
strcpy(pdir_path, dir_path);
pdir_path[dir_path_len] = CP_FNAMESEP_CHAR;
strcpy(pdir_path + dir_path_len + 1, de->d_name);
// Try to load a plug-in
plugin = cp_load_plugin_descriptor(context, pdir_path, &s);
if (plugin == NULL) {
status = s;
// continue loading plug-ins from other directories
continue;
}
// Insert plug-in to the list of available plug-ins
if ((hnode = hash_lookup(avail_plugins, plugin->identifier)) != NULL) {
cp_plugin_info_t *plugin2 = hnode_get(hnode);
if (cpi_vercmp(plugin->version, plugin2->version) > 0) {
hash_delete_free(avail_plugins, hnode);
cp_release_info(context, plugin2);
hnode = NULL;
}
}
if (hnode == NULL) {
if (!hash_alloc_insert(avail_plugins, plugin->identifier, plugin)) {
cpi_errorf(context, N_("Plug-in %s version %s could not be loaded due to insufficient system resources."), plugin->identifier, plugin->version);
cp_release_info(context, plugin);
status = CP_ERR_RESOURCE;
// continue loading plug-ins from other directories
continue;
}
}
}
errno = 0;
}
if (errno) {
cpi_errorf(context, N_("Could not read plug-in directory %s: %s"), dir_path, strerror(errno));
status = CP_ERR_IO;
// continue loading plug-ins from other directories
}
closedir(dir);
} else {
cpi_errorf(context, N_("Could not open plug-in directory %s: %s"), dir_path, strerror(errno));
status = CP_ERR_IO;
// continue loading plug-ins from other directories
}
lnode = list_next(context->env->plugin_dirs, lnode);
}
// Copy the list of started plug-ins, if necessary
if ((flags & CP_SP_RESTART_ACTIVE)
&& (flags & (CP_SP_UPGRADE | CP_SP_STOP_ALL_ON_INSTALL))) {
int i;
cp_status_t s;
if ((plugins = cp_get_plugins_info(context, &s, NULL)) == NULL) {
status = s;
break;
}
if ((started_plugins = list_create(LISTCOUNT_T_MAX)) == NULL) {
status = CP_ERR_RESOURCE;
break;
}
for (i = 0; plugins[i] != NULL; i++) {
cp_plugin_state_t state;
state = cp_get_plugin_state(context, plugins[i]->identifier);
if (state == CP_PLUGIN_STARTING || state == CP_PLUGIN_ACTIVE) {
char *pid;
if ((pid = strdup(plugins[i]->identifier)) == NULL) {
status = CP_ERR_RESOURCE;
break;
}
if ((lnode = lnode_create(pid)) == NULL) {
free(pid);
status = CP_ERR_RESOURCE;
break;
}
list_append(started_plugins, lnode);
}
}
cpi_release_info(context, plugins);
plugins = NULL;
}
// Install/upgrade plug-ins
hash_scan_begin(&hscan, avail_plugins);
while ((hnode = hash_scan_next(&hscan)) != NULL) {
cp_plugin_info_t *plugin;
cp_plugin_t *ip = NULL;
hnode_t *hn2;
int s;
plugin = hnode_get(hnode);
hn2 = hash_lookup(context->env->plugins, plugin->identifier);
if (hn2 != NULL) {
ip = hnode_get(hn2);
}
// Unload the installed plug-in if it is to be upgraded
if (ip != NULL
&& (flags & CP_SP_UPGRADE)
&& ((ip->plugin->version == NULL && plugin->version != NULL)
|| (ip->plugin->version != NULL
&& plugin->version != NULL
&& cpi_vercmp(plugin->version, ip->plugin->version) > 0))) {
if ((flags & (CP_SP_STOP_ALL_ON_UPGRADE | CP_SP_STOP_ALL_ON_INSTALL))
&& !plugins_stopped) {
plugins_stopped = 1;
cp_stop_plugins(context);
}
s = cp_uninstall_plugin(context, plugin->identifier);
assert(s == CP_OK);
ip = NULL;
}
// Install the plug-in, if to be installed
if (ip == NULL) {
if ((flags & CP_SP_STOP_ALL_ON_INSTALL) && !plugins_stopped) {
plugins_stopped = 1;
cp_stop_plugins(context);
}
if ((s = cp_install_plugin(context, plugin)) != CP_OK) {
status = s;
break;
}
}
// Remove the plug-in from the hash
hash_scan_delfree(avail_plugins, hnode);
cp_release_info(context, plugin);
}
// Restart stopped plug-ins if necessary
if (started_plugins != NULL) {
lnode = list_first(started_plugins);
while (lnode != NULL) {
char *pid;
int s;
pid = lnode_get(lnode);
s = cp_start_plugin(context, pid);
if (s != CP_OK) {
status = s;
}
lnode = list_next(started_plugins, lnode);
}
}
} while (0);
// Report error
switch (status) {
case CP_OK:
cpi_debug(context, N_("Plug-in scan has completed successfully."));
break;
case CP_ERR_RESOURCE:
cpi_error(context, N_("Could not scan plug-ins due to insufficient system resources."));
break;
default:
cpi_error(context, N_("Could not scan plug-ins."));
break;
}
cpi_unlock_context(context);
// Release resources
if (pdir_path != NULL) {
free(pdir_path);
}
if (avail_plugins != NULL) {
hscan_t hscan;
hnode_t *hnode;
hash_scan_begin(&hscan, avail_plugins);
while ((hnode = hash_scan_next(&hscan)) != NULL) {
cp_plugin_info_t *p = hnode_get(hnode);
hash_scan_delfree(avail_plugins, hnode);
cp_release_info(context, p);
}
hash_destroy(avail_plugins);
}
if (started_plugins != NULL) {
list_process(started_plugins, NULL, cpi_process_free_ptr);
list_destroy(started_plugins);
}
if (plugins != NULL) {
cp_release_info(context, plugins);
}
return status;
}