crm_node.c
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crm_node.c
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	/*
	* Copyright 2004-2024 the Pacemaker project contributors
	*
	* The version control history for this file may have further details.
	*
	* This source code is licensed under the GNU General Public License version 2
	* or later (GPLv2+) WITHOUT ANY WARRANTY.
	*/

	#include <crm_internal.h>

	#include <inttypes.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <errno.h>
	#include <sys/types.h>

	#include <crm/crm.h>
	#include <crm/common/cmdline_internal.h>
	#include <crm/common/output_internal.h>
	#include <crm/common/mainloop.h>
	#include <crm/common/xml.h>
	#include <crm/cib.h>
	#include <crm/cib/internal.h>
	#include <crm/common/ipc_controld.h>
	#include <crm/common/attrs_internal.h>

	#include <pacemaker-internal.h>

	#define SUMMARY "crm_node - Tool for displaying low-level node information"

	struct {
	gboolean corosync;
	gboolean dangerous_cmd;
	gboolean force_flag;
	char command;
	int nodeid;
	char *target_uname;
	} options = {
	.command = '\0',
	.force_flag = FALSE
	};

	gboolean command_cb(const gchar option_name, const gchar optarg, gpointer data, GError **error);
	gboolean name_cb(const gchar option_name, const gchar optarg, gpointer data, GError **error);
	gboolean remove_cb(const gchar option_name, const gchar optarg, gpointer data, GError **error);

	static GError *error = NULL;
	static GMainLoop *mainloop = NULL;
	static crm_exit_t exit_code = CRM_EX_OK;
	static pcmk__output_t *out = NULL;

	#define INDENT " "

	static GOptionEntry command_entries[] = {
	{ "cluster-id", 'i', G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, command_cb,
	"Display this node's cluster id",
	NULL },
	{ "list", 'l', G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, command_cb,
	"Display all known members (past and present) of this cluster",
	NULL },
	{ "name", 'n', G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, command_cb,
	"Display the name used by the cluster for this node",
	NULL },
	{ "partition", 'p', G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, command_cb,
	"Display the members of this partition",
	NULL },
	{ "quorum", 'q', G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, command_cb,
	"Display a 1 if our partition has quorum, 0 if not",
	NULL },
	{ "name-for-id", 'N', 0, G_OPTION_ARG_CALLBACK, name_cb,
	"Display the name used by the cluster for the node with the specified ID",
	"ID" },
	{ "remove", 'R', 0, G_OPTION_ARG_CALLBACK, remove_cb,
	"(Advanced) Remove the (stopped) node with the specified name from Pacemaker's\n"
	INDENT "configuration and caches (the node must already have been removed from\n"
	INDENT "the underlying cluster stack configuration",
	"NAME" },

	{ NULL }
	};

	static GOptionEntry addl_entries[] = {
	{ "force", 'f', 0, G_OPTION_ARG_NONE, &options.force_flag,
	NULL,
	NULL },
	#if SUPPORT_COROSYNC
	/* Unused and deprecated */
	{ "corosync", 'C', G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_NONE, &options.corosync,
	NULL,
	NULL },
	#endif

	// @TODO add timeout option for when IPC replies are needed

	{ NULL }
	};

	static pcmk__supported_format_t formats[] = {
	PCMK__SUPPORTED_FORMAT_NONE,
	PCMK__SUPPORTED_FORMAT_TEXT,
	PCMK__SUPPORTED_FORMAT_XML,
	{ NULL, NULL, NULL }
	};

	gboolean
	command_cb(const gchar option_name, const gchar optarg, gpointer data, GError **error) {
	if (pcmk__str_eq("-i", option_name, pcmk__str_casei) \|\| pcmk__str_eq("--cluster-id", option_name, pcmk__str_casei)) {
	options.command = 'i';
	} else if (pcmk__str_eq("-l", option_name, pcmk__str_casei) \|\| pcmk__str_eq("--list", option_name, pcmk__str_casei)) {
	options.command = 'l';
	} else if (pcmk__str_eq("-n", option_name, pcmk__str_casei) \|\| pcmk__str_eq("--name", option_name, pcmk__str_casei)) {
	options.command = 'n';
	} else if (pcmk__str_eq("-p", option_name, pcmk__str_casei) \|\| pcmk__str_eq("--partition", option_name, pcmk__str_casei)) {
	options.command = 'p';
	} else if (pcmk__str_eq("-q", option_name, pcmk__str_casei) \|\| pcmk__str_eq("--quorum", option_name, pcmk__str_casei)) {
	options.command = 'q';
	} else {
	g_set_error(error, PCMK__EXITC_ERROR, CRM_EX_INVALID_PARAM, "Unknown param passed to command_cb: %s", option_name);
	return FALSE;
	}

	return TRUE;
	}

	gboolean
	name_cb(const gchar option_name, const gchar optarg, gpointer data, GError **error) {
	options.command = 'N';
	pcmk__scan_min_int(optarg, &(options.nodeid), 0);
	return TRUE;
	}

	gboolean
	remove_cb(const gchar option_name, const gchar optarg, gpointer data, GError **error) {
	if (optarg == NULL) {
	g_set_error(error, PCMK__EXITC_ERROR, CRM_EX_INVALID_PARAM, "-R option requires an argument");
	return FALSE;
	}

	options.command = 'R';
	options.dangerous_cmd = TRUE;
	pcmk__str_update(&options.target_uname, optarg);
	return TRUE;
	}

	PCMK__OUTPUT_ARGS("node-id", "uint32_t")
	static int
	node_id_default(pcmk__output_t *out, va_list args) {
	uint32_t node_id = va_arg(args, uint32_t);

	out->info(out, "%" PRIu32, node_id);
	return pcmk_rc_ok;
	}

	PCMK__OUTPUT_ARGS("node-id", "uint32_t")
	static int
	node_id_xml(pcmk__output_t *out, va_list args) {
	uint32_t node_id = va_arg(args, uint32_t);

	char *id_s = crm_strdup_printf("%" PRIu32, node_id);

	pcmk__output_create_xml_node(out, PCMK_XE_NODE_INFO,
	PCMK_XA_NODEID, id_s,
	NULL);

	free(id_s);
	return pcmk_rc_ok;
	}

	PCMK__OUTPUT_ARGS("simple-node-list", "GList *")
	static int
	simple_node_list_default(pcmk__output_t *out, va_list args)
	{
	GList nodes = va_arg(args, GList );

	for (GList *node_iter = nodes; node_iter != NULL; node_iter = node_iter->next) {
	pcmk_controld_api_node_t *node = node_iter->data;
	out->info(out, "%" PRIu32 " %s %s", node->id, pcmk__s(node->uname, ""),
	pcmk__s(node->state, ""));
	}

	return pcmk_rc_ok;
	}

	PCMK__OUTPUT_ARGS("simple-node-list", "GList *")
	static int
	simple_node_list_xml(pcmk__output_t *out, va_list args)
	{
	GList nodes = va_arg(args, GList );

	out->begin_list(out, NULL, NULL, PCMK_XE_NODES);

	for (GList *node_iter = nodes; node_iter != NULL; node_iter = node_iter->next) {
	pcmk_controld_api_node_t *node = node_iter->data;
	char *id_s = crm_strdup_printf("%" PRIu32, node->id);

	pcmk__output_create_xml_node(out, PCMK_XE_NODE,
	PCMK_XA_ID, id_s,
	PCMK_XA_NAME, node->uname,
	PCMK_XA_STATE, node->state,
	NULL);

	free(id_s);
	}

	out->end_list(out);

	return pcmk_rc_ok;
	}

	PCMK__OUTPUT_ARGS("node-name", "uint32_t", "const char *")
	static int
	node_name_default(pcmk__output_t *out, va_list args) {
	uint32_t node_id G_GNUC_UNUSED = va_arg(args, uint32_t);
	const char node_name = va_arg(args, const char );

	out->info(out, "%s", node_name);
	return pcmk_rc_ok;
	}

	PCMK__OUTPUT_ARGS("node-name", "uint32_t", "const char *")
	static int
	node_name_xml(pcmk__output_t *out, va_list args) {
	uint32_t node_id = va_arg(args, uint32_t);
	const char node_name = va_arg(args, const char );

	char *id_s = crm_strdup_printf("%" PRIu32, node_id);

	pcmk__output_create_xml_node(out, PCMK_XE_NODE_INFO,
	PCMK_XA_NODEID, id_s,
	PCMK_XA_UNAME, node_name,
	NULL);

	free(id_s);
	return pcmk_rc_ok;
	}

	PCMK__OUTPUT_ARGS("partition-list", "GList *")
	static int
	partition_list_default(pcmk__output_t *out, va_list args)
	{
	GList nodes = va_arg(args, GList );

	GString *buffer = NULL;

	for (GList *node_iter = nodes; node_iter != NULL; node_iter = node_iter->next) {
	pcmk_controld_api_node_t *node = node_iter->data;
	if (pcmk__str_eq(node->state, "member", pcmk__str_none)) {
	pcmk__add_separated_word(&buffer, 128, pcmk__s(node->uname, ""), " ");
	}
	}

	if (buffer != NULL) {
	out->info(out, "%s", buffer->str);
	g_string_free(buffer, TRUE);
	return pcmk_rc_ok;
	}

	return pcmk_rc_no_output;
	}

	PCMK__OUTPUT_ARGS("partition-list", "GList *")
	static int
	partition_list_xml(pcmk__output_t *out, va_list args)
	{
	GList nodes = va_arg(args, GList );

	out->begin_list(out, NULL, NULL, PCMK_XE_NODES);

	for (GList *node_iter = nodes; node_iter != NULL; node_iter = node_iter->next) {
	pcmk_controld_api_node_t *node = node_iter->data;

	if (pcmk__str_eq(node->state, "member", pcmk__str_none)) {
	char *id_s = crm_strdup_printf("%" PRIu32, node->id);

	pcmk__output_create_xml_node(out, PCMK_XE_NODE,
	PCMK_XA_ID, id_s,
	PCMK_XA_NAME, node->uname,
	PCMK_XA_STATE, node->state,
	NULL);
	free(id_s);
	}
	}

	out->end_list(out);
	return pcmk_rc_ok;
	}

	PCMK__OUTPUT_ARGS("quorum", "bool")
	static int
	quorum_default(pcmk__output_t *out, va_list args) {
	bool have_quorum = va_arg(args, int);

	out->info(out, "%d", have_quorum);
	return pcmk_rc_ok;
	}

	PCMK__OUTPUT_ARGS("quorum", "bool")
	static int
	quorum_xml(pcmk__output_t *out, va_list args) {
	bool have_quorum = va_arg(args, int);

	pcmk__output_create_xml_node(out, PCMK_XE_CLUSTER_INFO,
	PCMK_XA_QUORUM, pcmk__btoa(have_quorum),
	NULL);
	return pcmk_rc_ok;
	}

	static pcmk__message_entry_t fmt_functions[] = {
	{ "node-id", "default", node_id_default },
	{ "node-id", "xml", node_id_xml },
	{ "node-name", "default", node_name_default },
	{ "node-name", "xml", node_name_xml },
	{ "partition-list", "default", partition_list_default },
	{ "partition-list", "xml", partition_list_xml },
	{ "quorum", "default", quorum_default },
	{ "quorum", "xml", quorum_xml },
	{ "simple-node-list", "default", simple_node_list_default },
	{ "simple-node-list", "xml", simple_node_list_xml },

	{ NULL, NULL, NULL }
	};

	static gint
	sort_node(gconstpointer a, gconstpointer b)
	{
	const pcmk_controld_api_node_t *node_a = a;
	const pcmk_controld_api_node_t *node_b = b;

	return pcmk__numeric_strcasecmp((node_a->uname? node_a->uname : ""),
	(node_b->uname? node_b->uname : ""));
	}

	static void
	controller_event_cb(pcmk_ipc_api_t *controld_api,
	enum pcmk_ipc_event event_type, crm_exit_t status,
	void event_data, void user_data)
	{
	pcmk_controld_api_reply_t *reply = event_data;

	switch (event_type) {
	case pcmk_ipc_event_disconnect:
	if (exit_code == CRM_EX_DISCONNECT) { // Unexpected
	g_set_error(&error, PCMK__EXITC_ERROR, exit_code,
	"Lost connection to controller");
	}
	goto done;
	break;

	case pcmk_ipc_event_reply:
	break;

	default:
	return;
	}

	if (status != CRM_EX_OK) {
	exit_code = status;
	g_set_error(&error, PCMK__EXITC_ERROR, status,
	"Bad reply from controller: %s",
	crm_exit_str(status));
	goto done;
	}

	if (reply->reply_type != pcmk_controld_reply_nodes) {
	g_set_error(&error, PCMK__EXITC_ERROR, CRM_EX_INDETERMINATE,
	"Unknown reply type %d from controller",
	reply->reply_type);
	goto done;
	}

	reply->data.nodes = g_list_sort(reply->data.nodes, sort_node);

	if (options.command == 'p') {
	out->message(out, "partition-list", reply->data.nodes);
	} else if (options.command == 'l') {
	out->message(out, "simple-node-list", reply->data.nodes);
	}

	// Success
	exit_code = CRM_EX_OK;
	done:
	pcmk_disconnect_ipc(controld_api);
	pcmk_quit_main_loop(mainloop, 10);
	}

	static void
	run_controller_mainloop(void)
	{
	pcmk_ipc_api_t *controld_api = NULL;
	int rc;

	// Set disconnect exit code to handle unexpected disconnects
	exit_code = CRM_EX_DISCONNECT;

	// Create controller IPC object
	rc = pcmk_new_ipc_api(&controld_api, pcmk_ipc_controld);
	if (rc != pcmk_rc_ok) {
	g_set_error(&error, PCMK__RC_ERROR, rc,
	"Could not connect to controller: %s",
	pcmk_rc_str(rc));
	return;
	}
	pcmk_register_ipc_callback(controld_api, controller_event_cb, NULL);

	// Connect to controller
	rc = pcmk__connect_ipc(controld_api, pcmk_ipc_dispatch_main, 5);
	if (rc != pcmk_rc_ok) {
	exit_code = pcmk_rc2exitc(rc);
	g_set_error(&error, PCMK__EXITC_ERROR, exit_code,
	"Could not connect to %s: %s",
	pcmk_ipc_name(controld_api, true), pcmk_rc_str(rc));
	return;
	}

	rc = pcmk_controld_api_list_nodes(controld_api);

	if (rc != pcmk_rc_ok) {
	pcmk_disconnect_ipc(controld_api);
	exit_code = pcmk_rc2exitc(rc);
	g_set_error(&error, PCMK__EXITC_ERROR, exit_code,
	"Could not ping controller: %s", pcmk_rc_str(rc));
	return;
	}

	// Run main loop to get controller reply via controller_event_cb()
	mainloop = g_main_loop_new(NULL, FALSE);
	g_main_loop_run(mainloop);
	g_main_loop_unref(mainloop);
	mainloop = NULL;
	pcmk_free_ipc_api(controld_api);
	}

	static void
	print_node_id(void)
	{
	uint32_t nodeid;
	int rc = pcmk__query_node_info(out, &nodeid, NULL, NULL, NULL, NULL, NULL,
	false, 0);

	if (rc != pcmk_rc_ok) {
	/* pcmk__query_node_info already sets an error message on the output object,
	* so there's no need to call g_set_error here. That would just create a
	* duplicate error message in the output.
	*/
	exit_code = pcmk_rc2exitc(rc);
	return;
	}

	rc = out->message(out, "node-id", nodeid);

	if (rc != pcmk_rc_ok) {
	g_set_error(&error, PCMK__RC_ERROR, rc, "Could not print node ID: %s",
	pcmk_rc_str(rc));
	}

	exit_code = pcmk_rc2exitc(rc);
	}

	static void
	print_node_name(uint32_t nodeid)
	{
	int rc = pcmk_rc_ok;
	char *node_name = NULL;

	if (nodeid == 0) {
	// Check environment first (i.e. when called by resource agent)
	const char *name = getenv("OCF_RESKEY_" CRM_META "_"
	PCMK__META_ON_NODE);

	if (name != NULL) {
	rc = out->message(out, "node-name", 0UL, name);
	goto done;
	}
	}

	// Otherwise ask the controller

	/* pcmk__query_node_name already sets an error message on the output object,
	* so there's no need to call g_set_error here. That would just create a
	* duplicate error message in the output.
	*/
	rc = pcmk__query_node_name(out, nodeid, &node_name, 0);
	if (rc != pcmk_rc_ok) {
	exit_code = pcmk_rc2exitc(rc);
	return;
	}

	rc = out->message(out, "node-name", 0UL, node_name);

	done:
	if (node_name != NULL) {
	free(node_name);
	}

	if (rc != pcmk_rc_ok) {
	g_set_error(&error, PCMK__RC_ERROR, rc, "Could not print node name: %s",
	pcmk_rc_str(rc));
	}

	exit_code = pcmk_rc2exitc(rc);
	}

	static void
	print_quorum(void)
	{
	bool quorum;
	int rc = pcmk__query_node_info(out, NULL, NULL, NULL, NULL, &quorum, NULL,
	false, 0);

	if (rc != pcmk_rc_ok) {
	/* pcmk__query_node_info already sets an error message on the output object,
	* so there's no need to call g_set_error here. That would just create a
	* duplicate error message in the output.
	*/
	exit_code = pcmk_rc2exitc(rc);
	return;
	}

	rc = out->message(out, "quorum", quorum);

	if (rc != pcmk_rc_ok) {
	g_set_error(&error, PCMK__RC_ERROR, rc, "Could not print quorum status: %s",
	pcmk_rc_str(rc));
	}

	exit_code = pcmk_rc2exitc(rc);
	}

	/*!
	* \internal
	* \brief Extend a transaction by removing a node from a CIB section
	*
	* \param[in,out] cib Active CIB connection
	* \param[in] element CIB element containing node name and/or ID
	* \param[in] section CIB section that \p element is in
	* \param[in] node_name Name of node to purge (NULL to leave unspecified)
	* \param[in] node_id Node ID of node to purge (0 to leave unspecified)
	*
	* \note At least one of node_name and node_id must be specified.
	* \return Standard Pacemaker return code
	*/
	static int
	remove_from_section(cib_t cib, const char element, const char *section,
	const char *node_name, long node_id)
	{
	int rc = pcmk_rc_ok;
	xmlNode *xml = pcmk__xe_create(NULL, element);

	crm_xml_add(xml, PCMK_XA_UNAME, node_name);
	if (node_id > 0) {
	crm_xml_set_id(xml, "%ld", node_id);
	}

	rc = cib->cmds->remove(cib, section, xml, cib_transaction);
	free_xml(xml);
	return (rc >= 0)? pcmk_rc_ok : pcmk_legacy2rc(rc);
	}

	/*!
	* \internal
	* \brief Purge a node from CIB
	*
	* \param[in] node_name Name of node to purge (or NULL to leave unspecified)
	* \param[in] node_id Node ID of node to purge (or 0 to leave unspecified)
	*
	* \note At least one of node_name and node_id must be specified.
	* \return Standard Pacemaker return code
	*/
	static int
	purge_node_from_cib(const char *node_name, long node_id)
	{
	int rc = pcmk_rc_ok;
	int commit_rc = pcmk_rc_ok;
	cib_t *cib = NULL;

	// Connect to CIB and start a transaction
	cib = cib_new();
	if (cib == NULL) {
	return ENOTCONN;
	}
	rc = cib->cmds->signon(cib, crm_system_name, cib_command);
	if (rc == pcmk_ok) {
	rc = cib->cmds->init_transaction(cib);
	}
	if (rc != pcmk_ok) {
	rc = pcmk_legacy2rc(rc);
	cib__clean_up_connection(&cib);
	return rc;
	}

	// Remove from configuration and status
	rc = remove_from_section(cib, PCMK_XE_NODE, PCMK_XE_NODES, node_name,
	node_id);
	if (rc == pcmk_rc_ok) {
	rc = remove_from_section(cib, PCMK__XE_NODE_STATE, PCMK_XE_STATUS,
	node_name, node_id);
	}

	// Commit the transaction
	commit_rc = cib->cmds->end_transaction(cib, (rc == pcmk_rc_ok),
	cib_sync_call);
	cib__clean_up_connection(&cib);

	if ((rc == pcmk_rc_ok) && (commit_rc == pcmk_ok)) {
	crm_debug("Purged node %s (%ld) from CIB",
	pcmk__s(node_name, "by ID"), node_id);
	}
	return rc;
	}

	/*!
	* \internal
	* \brief Purge a node from a single server's peer cache
	*
	* \param[in] server IPC server to send request to
	* \param[in] node_name Name of node to purge (or NULL to leave unspecified)
	* \param[in] node_id Node ID of node to purge (or 0 to leave unspecified)
	*
	* \note At least one of node_name and node_id must be specified.
	* \return Standard Pacemaker return code
	*/
	static int
	purge_node_from(enum pcmk_ipc_server server, const char *node_name,
	long node_id)
	{
	pcmk_ipc_api_t *api = NULL;
	int rc;

	rc = pcmk_new_ipc_api(&api, server);
	if (rc != pcmk_rc_ok) {
	goto done;
	}

	rc = pcmk__connect_ipc(api, pcmk_ipc_dispatch_sync, 5);
	if (rc != pcmk_rc_ok) {
	goto done;
	}

	rc = pcmk_ipc_purge_node(api, node_name, node_id);
	done:
	if (rc != pcmk_rc_ok) { // Debug message already logged on success
	g_set_error(&error, PCMK__RC_ERROR, rc,
	"Could not purge node %s from %s: %s",
	pcmk__s(node_name, "by ID"), pcmk_ipc_name(api, true),
	pcmk_rc_str(rc));
	}
	pcmk_free_ipc_api(api);
	return rc;
	}

	/*!
	* \internal
	* \brief Purge a node from the fencer's peer cache
	*
	* \param[in] node_name Name of node to purge (or NULL to leave unspecified)
	* \param[in] node_id Node ID of node to purge (or 0 to leave unspecified)
	*
	* \note At least one of node_name and node_id must be specified.
	* \return Standard Pacemaker return code
	*/
	static int
	purge_node_from_fencer(const char *node_name, long node_id)
	{
	int rc = pcmk_rc_ok;
	crm_ipc_t *conn = NULL;
	xmlNode *cmd = NULL;

	conn = crm_ipc_new("stonith-ng", 0);
	if (conn == NULL) {
	rc = ENOTCONN;
	exit_code = pcmk_rc2exitc(rc);
	g_set_error(&error, PCMK__EXITC_ERROR, exit_code,
	"Could not connect to fencer to purge node %s",
	pcmk__s(node_name, "by ID"));
	return rc;
	}

	rc = pcmk__connect_generic_ipc(conn);
	if (rc != pcmk_rc_ok) {
	exit_code = pcmk_rc2exitc(rc);
	g_set_error(&error, PCMK__EXITC_ERROR, exit_code,
	"Could not connect to fencer to purge node %s: %s",
	pcmk__s(node_name, "by ID"), pcmk_rc_str(rc));
	crm_ipc_destroy(conn);
	return rc;
	}

	cmd = create_request(CRM_OP_RM_NODE_CACHE, NULL, NULL, "stonith-ng",
	crm_system_name, NULL);
	if (node_id > 0) {
	crm_xml_set_id(cmd, "%ld", node_id);
	}
	crm_xml_add(cmd, PCMK_XA_UNAME, node_name);

	rc = crm_ipc_send(conn, cmd, 0, 0, NULL);
	if (rc >= 0) {
	rc = pcmk_rc_ok;
	crm_debug("Purged node %s (%ld) from fencer",
	pcmk__s(node_name, "by ID"), node_id);
	} else {
	rc = pcmk_legacy2rc(rc);
	fprintf(stderr, "Could not purge node %s from fencer: %s\n",
	pcmk__s(node_name, "by ID"), pcmk_rc_str(rc));
	}
	free_xml(cmd);
	crm_ipc_close(conn);
	crm_ipc_destroy(conn);
	return rc;
	}

	static void
	remove_node(const char *target_uname)
	{
	int rc = pcmk_rc_ok;
	long nodeid = 0;
	const char *node_name = NULL;
	char *endptr = NULL;
	const enum pcmk_ipc_server servers[] = {
	pcmk_ipc_controld,
	pcmk_ipc_attrd,
	};

	// Check whether node was specified by name or numeric ID
	errno = 0;
	nodeid = strtol(target_uname, &endptr, 10);
	if ((errno != 0) \|\| (endptr == target_uname) \|\| (*endptr != '\0')
	\|\| (nodeid <= 0)) {
	// It's not a positive integer, so assume it's a node name
	nodeid = 0;
	node_name = target_uname;
	}

	for (int i = 0; i < PCMK__NELEM(servers); ++i) {
	rc = purge_node_from(servers[i], node_name, nodeid);
	if (rc != pcmk_rc_ok) {
	exit_code = pcmk_rc2exitc(rc);
	return;
	}
	}

	// The fencer hasn't been converted to pcmk_ipc_api_t yet
	rc = purge_node_from_fencer(node_name, nodeid);
	if (rc != pcmk_rc_ok) {
	exit_code = pcmk_rc2exitc(rc);
	return;
	}

	// Lastly, purge the node from the CIB itself
	rc = purge_node_from_cib(node_name, nodeid);
	exit_code = pcmk_rc2exitc(rc);
	}

	static GOptionContext *
	build_arg_context(pcmk__common_args_t args, GOptionGroup *group) {
	GOptionContext *context = NULL;

	GOptionEntry extra_prog_entries[] = {
	{ "quiet", 'Q', 0, G_OPTION_ARG_NONE, &(args->quiet),
	"Be less descriptive in output.",
	NULL },

	{ NULL }
	};

	context = pcmk__build_arg_context(args, "text (default), xml", group, NULL);

	/* Add the -q option, which cannot be part of the globally supported options
	* because some tools use that flag for something else.
	*/
	pcmk__add_main_args(context, extra_prog_entries);

	pcmk__add_arg_group(context, "commands", "Commands:",
	"Show command help", command_entries);
	pcmk__add_arg_group(context, "additional", "Additional Options:",
	"Show additional options", addl_entries);
	return context;
	}

	int
	main(int argc, char **argv)
	{
	int rc = pcmk_rc_ok;

	GOptionGroup *output_group = NULL;
	pcmk__common_args_t *args = pcmk__new_common_args(SUMMARY);
	gchar **processed_args = pcmk__cmdline_preproc(argv, "NR");
	GOptionContext *context = build_arg_context(args, &output_group);

	pcmk__register_formats(output_group, formats);
	if (!g_option_context_parse_strv(context, &processed_args, &error)) {
	exit_code = CRM_EX_USAGE;
	goto done;
	}

	pcmk__cli_init_logging("crm_node", args->verbosity);

	rc = pcmk__output_new(&out, args->output_ty, args->output_dest, argv);
	if (rc != pcmk_rc_ok) {
	exit_code = pcmk_rc2exitc(rc);
	g_set_error(&error, PCMK__EXITC_ERROR, exit_code,
	"Error creating output format %s: %s", args->output_ty,
	pcmk_rc_str(rc));
	goto done;
	}

	if (args->version) {
	out->version(out, false);
	goto done;
	}

	if (options.command == 0) {
	char *help = g_option_context_get_help(context, TRUE, NULL);

	out->err(out, "%s", help);
	g_free(help);
	exit_code = CRM_EX_USAGE;
	goto done;
	}

	if (options.dangerous_cmd && options.force_flag == FALSE) {
	exit_code = CRM_EX_USAGE;
	g_set_error(&error, PCMK__EXITC_ERROR, exit_code,
	"The supplied command is considered dangerous."
	" To prevent accidental destruction of the cluster,"
	" the --force flag is required in order to proceed.");
	goto done;
	}

	pcmk__register_lib_messages(out);
	pcmk__register_messages(out, fmt_functions);

	switch (options.command) {
	case 'i':
	print_node_id();
	break;

	case 'n':
	print_node_name(0);
	break;

	case 'q':
	print_quorum();
	break;

	case 'N':
	print_node_name(options.nodeid);
	break;

	case 'R':
	remove_node(options.target_uname);
	break;

	case 'l':
	case 'p':
	run_controller_mainloop();
	break;

	default:
	break;
	}

	done:
	g_strfreev(processed_args);
	pcmk__free_arg_context(context);

	pcmk__output_and_clear_error(&error, out);

	if (out != NULL) {
	out->finish(out, exit_code, true, NULL);
	pcmk__output_free(out);
	}
	pcmk__unregister_formats();
	return crm_exit(exit_code);
	}

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