Adding upstream version 9.1.upstream/9.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 785 insertions, 0 deletions

diff --git a/vtysh/vtysh_config.c b/vtysh/vtysh_config.c
new file mode 100644
index 0000000..ae64d51
--- /dev/null
+++ b/vtysh/vtysh_config.c
@@ -0,0 +1,785 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Configuration generator.
+ * Copyright (C) 2000 Kunihiro Ishiguro
+ */
+
+#include <zebra.h>
+#include <sys/wait.h>
+
+#include "command.h"
+#include "linklist.h"
+#include "memory.h"
+#include "typesafe.h"
+
+#include "vtysh/vtysh.h"
+#include "vtysh/vtysh_user.h"
+
+DEFINE_MGROUP(MVTYSH, "vtysh");
+DEFINE_MTYPE_STATIC(MVTYSH, VTYSH_CONFIG, "Vtysh configuration");
+DEFINE_MTYPE_STATIC(MVTYSH, VTYSH_CONFIG_LINE, "Vtysh configuration line");
+
+vector configvec;
+
+PREDECL_LIST(config_master);
+PREDECL_HASH(config_master_hash);
+
+struct config {
+	/* Configuration node name. */
+	char *name;
+
+	/* Configuration string line. */
+	struct list *line;
+
+	/* Configuration can be nested. */
+	struct config *parent;
+	vector nested;
+
+	/* Exit command. */
+	char *exit;
+
+	/* Index of this config. */
+	uint32_t index;
+
+	/* Node entry for the typed Red-black tree */
+	struct config_master_item rbt_item;
+	struct config_master_hash_item hash_item;
+};
+
+struct list *config_top;
+
+static int line_cmp(char *c1, char *c2)
+{
+	return strcmp(c1, c2);
+}
+
+static void line_del(char *line)
+{
+	XFREE(MTYPE_VTYSH_CONFIG_LINE, line);
+}
+
+static struct config *config_new(void)
+{
+	struct config *config;
+	config = XCALLOC(MTYPE_VTYSH_CONFIG, sizeof(struct config));
+	return config;
+}
+
+static void config_del(struct config *config)
+{
+	vector_free(config->nested);
+	list_delete(&config->line);
+	if (config->exit)
+		XFREE(MTYPE_VTYSH_CONFIG_LINE, config->exit);
+	XFREE(MTYPE_VTYSH_CONFIG_LINE, config->name);
+	XFREE(MTYPE_VTYSH_CONFIG, config);
+}
+
+static int config_cmp(const struct config *c1, const struct config *c2)
+{
+	return strcmp(c1->name, c2->name);
+}
+
+static uint32_t config_hash(const struct config *c)
+{
+	return string_hash_make(c->name);
+}
+
+DECLARE_LIST(config_master, struct config, rbt_item);
+DECLARE_HASH(config_master_hash, struct config, hash_item, config_cmp,
+	     config_hash);
+
+/*
+ * The config_master_head is a list for order of receipt
+ * The hash is for quick lookup under this NODE
+ */
+struct configuration {
+	struct config_master_head master;
+	struct config_master_hash_head hash_master;
+};
+
+static struct config *config_get_vec(vector vec, int index, const char *line)
+{
+	struct config *config, *config_loop;
+	struct configuration *configuration;
+	struct config lookup;
+
+	config = config_loop = NULL;
+
+	configuration = vector_lookup_ensure(vec, index);
+
+	if (!configuration) {
+		configuration = XMALLOC(MTYPE_VTYSH_CONFIG,
+					sizeof(struct configuration));
+		config_master_init(&configuration->master);
+		config_master_hash_init(&configuration->hash_master);
+		vector_set_index(vec, index, configuration);
+	}
+
+	lookup.name = (char *)line;
+	config = config_master_hash_find(&configuration->hash_master, &lookup);
+
+	if (!config) {
+		config = config_new();
+		config->line = list_new();
+		config->line->del = (void (*)(void *))line_del;
+		config->line->cmp = (int (*)(void *, void *))line_cmp;
+		config->name = XSTRDUP(MTYPE_VTYSH_CONFIG_LINE, line);
+		config->exit = NULL;
+		config->index = index;
+		config->nested = vector_init(1);
+		config_master_add_tail(&configuration->master, config);
+		config_master_hash_add(&configuration->hash_master, config);
+	}
+	return config;
+}
+
+static struct config *config_get(int index, const char *line)
+{
+	return config_get_vec(configvec, index, line);
+}
+
+static struct config *config_get_nested(struct config *parent, int index,
+					const char *line)
+{
+	struct config *config;
+
+	config = config_get_vec(parent->nested, index, line);
+	config->parent = parent;
+
+	return config;
+}
+
+void config_add_line(struct list *config, const char *line)
+{
+	listnode_add(config, XSTRDUP(MTYPE_VTYSH_CONFIG_LINE, line));
+}
+
+static void config_add_line_uniq(struct list *config, const char *line)
+{
+	struct listnode *node, *nnode;
+	char *pnt;
+
+	for (ALL_LIST_ELEMENTS(config, node, nnode, pnt)) {
+		if (strcmp(pnt, line) == 0)
+			return;
+	}
+	listnode_add_sort(config, XSTRDUP(MTYPE_VTYSH_CONFIG_LINE, line));
+}
+
+/*
+ * Add a line that should only be shown once, and always show at the end of the
+ * config block.
+ *
+ * If the line already exists, it will be moved to the end of the block. If it
+ * does not exist, it will be added at the end of the block.
+ *
+ * Note that this only makes sense when there is just one such line that should
+ * show up at the very end of a config block. Furthermore, if the same block
+ * can show up from multiple daemons, all of them must make sure to print the
+ * line at the end of their config, otherwise the line will show at the end of
+ * the config for the last daemon that printed it.
+ *
+ * Here is a motivating example with the 'exit-vrf' command. Suppose we receive
+ * a config from Zebra like so:
+ *
+ * vrf BLUE
+ *    ip route A
+ *    ip route B
+ *    exit-vrf
+ *
+ * Then suppose we later receive this config from PIM:
+ *
+ * vrf BLUE
+ *    ip msdp mesh-group MyGroup member 1.2.3.4
+ *    exit-vrf
+ *
+ * Then we will combine them into one config block like so:
+ *
+ * vrf BLUE
+ *    ip route A
+ *    ip route B
+ *    ip msdp mesh-group MyGroup member 1.2.3.4
+ *    exit-vrf
+ *
+ * Because PIM also sent us an 'exit-vrf', we noticed that we already had one
+ * under the 'vrf BLUE' config block and so we moved it to the end of the
+ * config block again. If PIM had neglected to send us 'exit-vrf', the result
+ * would be this:
+ *
+ * vrf BLUE
+ *    ip route A
+ *    ip route B
+ *    exit-vrf
+ *    ip msdp mesh-group MyGroup member 1.2.3.4
+ *
+ * Therefore, daemons that share config blocks must take care to consistently
+ * print the same block terminators.
+ *
+ * Ideally this would be solved by adding a string to struct config that is
+ * always printed at the end when dumping a config. However, this would only
+ * work when the user is using integrated config. In the non-integrated config
+ * case, daemons are responsible for writing their own config files, and so the
+ * must be able to print these blocks correctly independently of vtysh, which
+ * means they are the ones that need to handle printing the block terminators
+ * and VTYSH needs to be smart enough to combine them properly.
+ *
+ * ---
+ *
+ * config
+ *    The config to add the line to
+ *
+ * line
+ *    The line to add to the end of the config
+ */
+static void config_add_line_uniq_end(struct list *config, const char *line)
+{
+	struct listnode *node;
+	char *pnt;
+
+	for (ALL_LIST_ELEMENTS_RO(config, node, pnt)) {
+		if (strcmp(pnt, line) == 0)
+			break;
+	}
+
+	if (!node)
+		config_add_line(config, line);
+	else
+		listnode_move_to_tail(config, node);
+}
+
+static void config_add_line_head(struct list *config, const char *line)
+{
+	listnode_add_head(config, XSTRDUP(MTYPE_VTYSH_CONFIG_LINE, line));
+}
+
+void vtysh_config_parse_line(void *arg, const char *line)
+{
+	char c;
+	static struct config *config = NULL;
+
+	if (!line)
+		return;
+
+	c = line[0];
+
+	if (c == '\0')
+		return;
+
+	switch (c) {
+	/* Suppress exclamation points ! and commented lines. The !s are
+	 * generated
+	 * dynamically in vtysh_config_dump() */
+	case '!':
+	case '#':
+		break;
+	case ' ':
+		/* Store line to current configuration. */
+		if (config) {
+			if (config->index == KEYCHAIN_NODE
+			    && strncmp(line, " key", strlen(" key")) == 0) {
+				config = config_get_nested(
+					config, KEYCHAIN_KEY_NODE, line);
+			} else if (config->index == KEYCHAIN_KEY_NODE) {
+				if (strncmp(line, " exit", strlen(" exit"))
+				    == 0) {
+					config_add_line_uniq_end(config->line,
+								 line);
+					config = config->parent;
+				} else {
+					config_add_line_uniq(config->line,
+							     line);
+				}
+			} else if (strncmp(line, " link-params",
+					   strlen(" link-params"))
+				   == 0) {
+				config_add_line(config->line, line);
+				config->index = LINK_PARAMS_NODE;
+			} else if (strncmp(line, " ip multicast boundary",
+					   strlen(" ip multicast boundary"))
+				   == 0) {
+				config_add_line_uniq_end(config->line, line);
+			} else if (strncmp(line, " ip igmp query-interval",
+					   strlen(" ip igmp query-interval"))
+				   == 0) {
+				config_add_line_uniq_end(config->line, line);
+			} else if (config->index == LINK_PARAMS_NODE
+				   && strncmp(line, " exit-link-params",
+					      strlen(" exit"))
+					      == 0) {
+				config_add_line(config->line, line);
+				config->index = INTERFACE_NODE;
+			} else if (!strncmp(line, " vrrp", strlen(" vrrp"))
+				   || !strncmp(line, " no vrrp",
+					       strlen(" no vrrp"))) {
+				config_add_line(config->line, line);
+			} else if (!strncmp(line, " ip mroute",
+					    strlen(" ip mroute"))) {
+				config_add_line_uniq_end(config->line, line);
+			} else if (config->index == RMAP_NODE ||
+				   config->index == INTERFACE_NODE ||
+				   config->index == VTY_NODE)
+				config_add_line_uniq(config->line, line);
+			else if (config->index == NH_GROUP_NODE) {
+				if (strncmp(line, " resilient",
+					    strlen(" resilient")) == 0)
+					config_add_line_head(config->line,
+							     line);
+				else
+					config_add_line_uniq_end(config->line,
+								 line);
+			} else
+				config_add_line(config->line, line);
+		} else
+			config_add_line(config_top, line);
+		break;
+	default:
+		if (strncmp(line, "exit", strlen("exit")) == 0) {
+			if (config) {
+				if (config->exit)
+					XFREE(MTYPE_VTYSH_CONFIG_LINE,
+					      config->exit);
+				config->exit =
+					XSTRDUP(MTYPE_VTYSH_CONFIG_LINE, line);
+			}
+		} else if (strncmp(line, "interface", strlen("interface")) == 0)
+			config = config_get(INTERFACE_NODE, line);
+		else if (strncmp(line, "pseudowire", strlen("pseudowire")) == 0)
+			config = config_get(PW_NODE, line);
+		else if (strncmp(line, "vrf", strlen("vrf")) == 0)
+			config = config_get(VRF_NODE, line);
+		else if (strncmp(line, "nexthop-group", strlen("nexthop-group"))
+			 == 0)
+			config = config_get(NH_GROUP_NODE, line);
+		else if (strncmp(line, "router-id", strlen("router-id")) == 0)
+			config = config_get(ZEBRA_NODE, line);
+		else if (strncmp(line, "router rip", strlen("router rip")) == 0)
+			config = config_get(RIP_NODE, line);
+		else if (strncmp(line, "router ripng", strlen("router ripng"))
+			 == 0)
+			config = config_get(RIPNG_NODE, line);
+		else if (strncmp(line, "router eigrp", strlen("router eigrp"))
+			 == 0)
+			config = config_get(EIGRP_NODE, line);
+		else if (strncmp(line, "router babel", strlen("router babel"))
+			 == 0)
+			config = config_get(BABEL_NODE, line);
+		else if (strncmp(line, "router ospf", strlen("router ospf"))
+			 == 0)
+			config = config_get(OSPF_NODE, line);
+		else if (strncmp(line, "router ospf6", strlen("router ospf6"))
+			 == 0)
+			config = config_get(OSPF6_NODE, line);
+		else if (strncmp(line, "mpls ldp", strlen("mpls ldp")) == 0)
+			config = config_get(LDP_NODE, line);
+		else if (strncmp(line, "l2vpn", strlen("l2vpn")) == 0)
+			config = config_get(LDP_L2VPN_NODE, line);
+		else if (strncmp(line, "router bgp", strlen("router bgp")) == 0)
+			config = config_get(BGP_NODE, line);
+		else if (strncmp(line, "router isis", strlen("router isis"))
+			 == 0)
+			config = config_get(ISIS_NODE, line);
+		else if (strncmp(line, "router openfabric", strlen("router openfabric"))
+			 == 0)
+			config = config_get(OPENFABRIC_NODE, line);
+		else if (strncmp(line, "affinity-map",
+				 strlen("affinity-map")) == 0)
+			config = config_get(AFFMAP_NODE, line);
+		else if (strncmp(line, "route-map", strlen("route-map")) == 0)
+			config = config_get(RMAP_NODE, line);
+		else if (strncmp(line, "no route-map", strlen("no route-map"))
+			 == 0)
+			config = config_get(RMAP_NODE, line);
+		else if (strncmp(line, "pbr-map", strlen("pbr-map")) == 0)
+			config = config_get(PBRMAP_NODE, line);
+		else if (strncmp(line, "access-list", strlen("access-list"))
+			 == 0)
+			config = config_get(ACCESS_NODE, line);
+		else if (strncmp(line, "ipv6 access-list",
+				 strlen("ipv6 access-list"))
+			 == 0)
+			config = config_get(ACCESS_IPV6_NODE, line);
+		else if (strncmp(line, "mac access-list",
+				 strlen("mac access-list"))
+			 == 0)
+			config = config_get(ACCESS_MAC_NODE, line);
+		else if (strncmp(line, "ip prefix-list",
+				 strlen("ip prefix-list"))
+			 == 0)
+			config = config_get(PREFIX_NODE, line);
+		else if (strncmp(line, "ipv6 prefix-list",
+				 strlen("ipv6 prefix-list"))
+			 == 0)
+			config = config_get(PREFIX_IPV6_NODE, line);
+		else if (strncmp(line, "bgp as-path access-list",
+				 strlen("bgp as-path access-list"))
+			 == 0)
+			config = config_get(AS_LIST_NODE, line);
+		else if (strncmp(line, "bgp community-list",
+				 strlen("bgp community-list"))
+				 == 0
+			 || strncmp(line, "bgp extcommunity-list",
+				    strlen("bgp extcommunity-list"))
+				    == 0
+			 || strncmp(line, "bgp large-community-list",
+				    strlen("bgp large-community-list"))
+				    == 0)
+			config = config_get(COMMUNITY_LIST_NODE, line);
+		else if (strncmp(line, "bgp community alias",
+				 strlen("bgp community alias")) == 0)
+			config = config_get(COMMUNITY_ALIAS_NODE, line);
+		else if (strncmp(line, "ip route", strlen("ip route")) == 0)
+			config = config_get(IP_NODE, line);
+		else if (strncmp(line, "ipv6 route", strlen("ipv6 route")) == 0)
+			config = config_get(IP_NODE, line);
+		else if (strncmp(line, "key", strlen("key")) == 0)
+			config = config_get(KEYCHAIN_NODE, line);
+		else if (strncmp(line, "line", strlen("line")) == 0)
+			config = config_get(VTY_NODE, line);
+		else if ((strncmp(line, "ipv6 forwarding",
+				  strlen("ipv6 forwarding"))
+			  == 0)
+			 || (strncmp(line, "ip forwarding",
+				     strlen("ip forwarding"))
+			     == 0))
+			config = config_get(FORWARDING_NODE, line);
+		else if (strncmp(line, "debug vrf", strlen("debug vrf")) == 0)
+			config = config_get(VRF_DEBUG_NODE, line);
+		else if (strncmp(line, "debug northbound",
+				 strlen("debug northbound"))
+			 == 0)
+			config = config_get(NORTHBOUND_DEBUG_NODE, line);
+		else if (strncmp(line, "debug route-map",
+				 strlen("debug route-map"))
+			 == 0)
+			config = config_get(RMAP_DEBUG_NODE, line);
+		else if (strncmp(line, "debug resolver",
+				 strlen("debug resolver")) == 0)
+			config = config_get(RESOLVER_DEBUG_NODE, line);
+		else if (strncmp(line, "debug", strlen("debug")) == 0)
+			config = config_get(DEBUG_NODE, line);
+		else if (strncmp(line, "password", strlen("password")) == 0
+			 || strncmp(line, "enable password",
+				    strlen("enable password"))
+				    == 0)
+			config = config_get(AAA_NODE, line);
+		else if (strncmp(line, "ip protocol", strlen("ip protocol"))
+			 == 0)
+			config = config_get(PROTOCOL_NODE, line);
+		else if (strncmp(line, "ipv6 protocol", strlen("ipv6 protocol"))
+			 == 0)
+			config = config_get(PROTOCOL_NODE, line);
+		else if (strncmp(line, "ip nht", strlen("ip nht")) == 0)
+			config = config_get(PROTOCOL_NODE, line);
+		else if (strncmp(line, "ipv6 nht", strlen("ipv6 nht")) == 0)
+			config = config_get(PROTOCOL_NODE, line);
+		else if (strncmp(line, "mpls", strlen("mpls")) == 0)
+			config = config_get(MPLS_NODE, line);
+		else if (strncmp(line, "segment-routing",
+				 strlen("segment-routing"))
+			 == 0)
+			config = config_get(SEGMENT_ROUTING_NODE, line);
+		else if (strncmp(line, "bfd", strlen("bfd")) == 0)
+			config = config_get(BFD_NODE, line);
+		else if (strncmp(line, "rpki", strlen("rpki")) == 0)
+			config = config_get(RPKI_NODE, line);
+		else {
+			if (strncmp(line, "log", strlen("log")) == 0 ||
+			    strncmp(line, "hostname", strlen("hostname")) == 0 ||
+			    strncmp(line, "domainname", strlen("domainname")) ==
+				    0 ||
+			    strncmp(line, "allow-reserved-ranges",
+				    strlen("allow-reserved-ranges")) == 0 ||
+			    strncmp(line, "frr", strlen("frr")) == 0 ||
+			    strncmp(line, "agentx", strlen("agentx")) == 0 ||
+			    strncmp(line, "no log", strlen("no log")) == 0 ||
+			    strncmp(line, "no ip prefix-list",
+				    strlen("no ip prefix-list")) == 0 ||
+			    strncmp(line, "no ipv6 prefix-list",
+				    strlen("no ipv6 prefix-list")) == 0 ||
+			    strncmp(line, "service ", strlen("service ")) == 0 ||
+			    strncmp(line, "no service ",
+				    strlen("no service ")) == 0)
+				config_add_line_uniq(config_top, line);
+			else
+				config_add_line(config_top, line);
+			config = NULL;
+		}
+		break;
+	}
+}
+
+/* Macro to check delimiter is needed between each configuration line
+ * or not. */
+#define NO_DELIMITER(I)                                                        \
+	((I) == AFFMAP_NODE || (I) == ACCESS_NODE || (I) == PREFIX_NODE ||     \
+	 (I) == IP_NODE || (I) == AS_LIST_NODE ||                              \
+	 (I) == COMMUNITY_LIST_NODE || (I) == COMMUNITY_ALIAS_NODE ||          \
+	 (I) == ACCESS_IPV6_NODE || (I) == ACCESS_MAC_NODE ||                  \
+	 (I) == PREFIX_IPV6_NODE || (I) == FORWARDING_NODE ||                  \
+	 (I) == DEBUG_NODE || (I) == AAA_NODE || (I) == VRF_DEBUG_NODE ||      \
+	 (I) == NORTHBOUND_DEBUG_NODE || (I) == RMAP_DEBUG_NODE ||             \
+	 (I) == RESOLVER_DEBUG_NODE || (I) == MPLS_NODE ||                     \
+	 (I) == KEYCHAIN_KEY_NODE)
+
+static void configvec_dump(vector vec, bool nested)
+{
+	struct listnode *mnode, *mnnode;
+	struct config *config;
+	struct configuration *configuration;
+	char *line;
+	unsigned int i;
+
+	for (i = 0; i < vector_active(vec); i++)
+		if ((configuration = vector_slot(vec, i)) != NULL) {
+			while ((config = config_master_pop(
+					&configuration->master))) {
+				config_master_hash_del(
+					&configuration->hash_master, config);
+				/* Don't print empty sections for interface.
+				 * Route maps on the
+				 * other hand could have a legitimate empty
+				 * section at the end.
+				 * VRF is handled in the backend, we could have
+				 * "configured" VRFs with static routes which
+				 * are not under the VRF node.
+				 */
+				if (config->index == INTERFACE_NODE
+				    && list_isempty(config->line)) {
+					config_del(config);
+					continue;
+				}
+
+				vty_out(vty, "%s\n", config->name);
+
+				for (ALL_LIST_ELEMENTS(config->line, mnode,
+						       mnnode, line))
+					vty_out(vty, "%s\n", line);
+
+				configvec_dump(config->nested, true);
+
+				if (config->exit)
+					vty_out(vty, "%s\n", config->exit);
+
+				if (!NO_DELIMITER(i))
+					vty_out(vty, "!\n");
+
+				config_del(config);
+			}
+			config_master_fini(&configuration->master);
+			config_master_hash_fini(&configuration->hash_master);
+			XFREE(MTYPE_VTYSH_CONFIG, configuration);
+			vector_slot(vec, i) = NULL;
+			if (!nested && NO_DELIMITER(i))
+				vty_out(vty, "!\n");
+		}
+}
+
+void vtysh_config_dump(void)
+{
+	struct listnode *node, *nnode;
+	char *line;
+
+	for (ALL_LIST_ELEMENTS(config_top, node, nnode, line))
+		vty_out(vty, "%s\n", line);
+
+	list_delete_all_node(config_top);
+
+	vty_out(vty, "!\n");
+
+	configvec_dump(configvec, false);
+}
+
+/* Read up configuration file from file_name. */
+static int vtysh_read_file(FILE *confp, bool dry_run)
+{
+	struct vty *vty;
+	int ret;
+
+	vty = vty_new();
+	vty->wfd = STDERR_FILENO;
+	vty->type = VTY_TERM;
+	vty->node = CONFIG_NODE;
+
+	vtysh_execute_no_pager("enable");
+	vtysh_execute_no_pager("conf term file-lock");
+	vty->vtysh_file_locked = true;
+
+	if (!dry_run)
+		vtysh_execute_no_pager("XFRR_start_configuration");
+
+	/* Execute configuration file. */
+	ret = vtysh_config_from_file(vty, confp);
+
+	if (!dry_run)
+		vtysh_execute_no_pager("XFRR_end_configuration");
+
+	vtysh_execute_no_pager("end");
+	vty->vtysh_file_locked = false;
+	vtysh_execute_no_pager("disable");
+
+	vty_close(vty);
+
+	return (ret);
+}
+
+/*
+ * Read configuration file and send it to all connected daemons
+ */
+static int vtysh_read_config(const char *config_file_path, bool dry_run)
+{
+	FILE *confp = NULL;
+	bool save;
+	int ret;
+
+	confp = fopen(config_file_path, "r");
+	if (confp == NULL) {
+		fprintf(stderr,
+			"%% Can't open configuration file %s due to '%s'.\n",
+			config_file_path, safe_strerror(errno));
+		return CMD_ERR_NO_FILE;
+	}
+
+	save = vtysh_add_timestamp;
+	vtysh_add_timestamp = false;
+
+	ret = vtysh_read_file(confp, dry_run);
+	fclose(confp);
+
+	vtysh_add_timestamp = save;
+
+	return ret;
+}
+
+int vtysh_apply_config(const char *config_file_path, bool dry_run, bool do_fork)
+{
+	/*
+	 * We need to apply the whole config file to all daemons. Instead of
+	 * having one client talk to N daemons, we fork N times and let each
+	 * child handle one daemon.
+	 */
+	pid_t fork_pid = getpid();
+	int status = 0;
+	int ret;
+	int my_client_type;
+	char my_client[64];
+
+	if (do_fork) {
+		for (unsigned int i = 0; i < array_size(vtysh_client); i++) {
+			/* Store name of client this fork will handle */
+			strlcpy(my_client, vtysh_client[i].name,
+				sizeof(my_client));
+			my_client_type = vtysh_client[i].flag;
+			fork_pid = fork();
+
+			/* If child, break */
+			if (fork_pid == 0)
+				break;
+		}
+
+		/* parent, wait for children */
+		if (fork_pid != 0) {
+			int keep_status = 0;
+
+			fprintf(stdout,
+				"Waiting for children to finish applying config...\n");
+			while (wait(&status) > 0) {
+				if (!keep_status && WEXITSTATUS(status))
+					keep_status = WEXITSTATUS(status);
+			}
+
+			/*
+			 * This will return the first status received
+			 * that failed( if that happens ).  This is
+			 * good enough for the moment
+			 */
+			return keep_status;
+		}
+
+		/*
+		 * children, grow up to be cowboys
+		 */
+		for (unsigned int i = 0; i < array_size(vtysh_client); i++) {
+			if (my_client_type != vtysh_client[i].flag) {
+				struct vtysh_client *cl;
+
+				/*
+				 * If this is a client we aren't responsible
+				 * for, disconnect
+				 */
+				for (cl = &vtysh_client[i]; cl; cl = cl->next) {
+					if (cl->fd >= 0)
+						close(cl->fd);
+					cl->fd = -1;
+				}
+			} else if (vtysh_client[i].fd == -1 &&
+				   vtysh_client[i].next == NULL) {
+				/*
+				 * If this is the client we are responsible
+				 * for, but we aren't already connected to that
+				 * client, that means the client isn't up in
+				 * the first place and we can exit early
+				 */
+				exit(0);
+			}
+		}
+
+		fprintf(stdout, "[%d|%s] sending configuration\n", getpid(),
+			my_client);
+	}
+
+	ret = vtysh_read_config(config_file_path, dry_run);
+
+	if (ret) {
+		if (do_fork)
+			fprintf(stderr,
+				"[%d|%s] Configuration file[%s] processing failure: %d\n",
+				getpid(), my_client, frr_config, ret);
+		else
+			fprintf(stderr,
+				"Configuration file[%s] processing failure: %d\n",
+				frr_config, ret);
+	} else if (do_fork) {
+		fprintf(stderr, "[%d|%s] done\n", getpid(), my_client);
+		exit(0);
+	}
+
+	return ret;
+}
+
+/* We don't write vtysh specific into file from vtysh. vtysh.conf should
+ * be edited by hand. So, we handle only "write terminal" case here and
+ * integrate vtysh specific conf with conf from daemons.
+ */
+void vtysh_config_write(void)
+{
+	const char *name;
+	char line[512];
+
+	name = cmd_hostname_get();
+	if (name && name[0] != '\0') {
+		snprintf(line, sizeof(line), "hostname %s", name);
+		vtysh_config_parse_line(NULL, line);
+	}
+
+	name = cmd_domainname_get();
+	if (name && name[0] != '\0') {
+		snprintf(line, sizeof(line), "domainname %s", name);
+		vtysh_config_parse_line(NULL, line);
+	}
+
+	if (vtysh_write_integrated == WRITE_INTEGRATED_NO)
+		vtysh_config_parse_line(NULL,
+					"no service integrated-vtysh-config");
+	if (vtysh_write_integrated == WRITE_INTEGRATED_YES)
+		vtysh_config_parse_line(NULL,
+					"service integrated-vtysh-config");
+
+	user_config_write();
+}
+
+void vtysh_config_init(void)
+{
+	config_top = list_new();
+	config_top->del = (void (*)(void *))line_del;
+	configvec = vector_init(1);
+}