1 files changed, 928 insertions, 0 deletions

diff --git a/lib/log_vty.c b/lib/log_vty.c
new file mode 100644
index 0000000..81280f3
--- /dev/null
+++ b/lib/log_vty.c
@@ -0,0 +1,928 @@
+/*
+ * Logging - VTY code
+ * Copyright (C) 2019 Cumulus Networks, Inc.
+ *                    Stephen Worley
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; see the file COPYING; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <zebra.h>
+
+#include "lib/log_vty.h"
+#include "command.h"
+#include "lib/log.h"
+#include "lib/zlog_targets.h"
+#include "lib/zlog_5424.h"
+#include "lib/lib_errors.h"
+#include "lib/printfrr.h"
+#include "lib/systemd.h"
+
+#ifndef VTYSH_EXTRACT_PL
+#include "lib/log_vty_clippy.c"
+#endif
+
+#define ZLOG_MAXLVL(a, b) MAX(a, b)
+
+DEFINE_HOOK(zlog_rotate, (), ());
+DEFINE_HOOK(zlog_cli_show, (struct vty * vty), (vty));
+
+static unsigned logmsgs_with_persist_bt;
+
+static const int log_default_lvl = LOG_DEBUG;
+
+static int log_config_stdout_lvl = ZLOG_DISABLED;
+static int log_config_syslog_lvl = ZLOG_DISABLED;
+static int log_cmdline_stdout_lvl = ZLOG_DISABLED;
+static int log_cmdline_syslog_lvl = ZLOG_DISABLED;
+
+static struct zlog_cfg_file zt_file_cmdline = {
+	.prio_min = ZLOG_DISABLED,
+};
+static struct zlog_cfg_file zt_file = {
+	.prio_min = ZLOG_DISABLED,
+};
+static struct zlog_cfg_filterfile zt_filterfile = {
+	.parent = {
+		.prio_min = ZLOG_DISABLED,
+	},
+};
+
+static struct zlog_cfg_file zt_stdout_file = {
+	.prio_min = ZLOG_DISABLED,
+};
+static struct zlog_cfg_5424 zt_stdout_journald = {
+	.prio_min = ZLOG_DISABLED,
+
+	.fmt = ZLOG_FMT_JOURNALD,
+	.dst = ZLOG_5424_DST_UNIX,
+	.filename = "/run/systemd/journal/socket",
+
+	/* this can't be changed through config since this target substitutes
+	 * in for the "plain" stdout target
+	 */
+	.facility = LOG_DAEMON,
+	.kw_version = false,
+	.kw_location = true,
+	.kw_uid = true,
+	.kw_ec = true,
+	.kw_args = true,
+};
+static bool stdout_journald_in_use;
+
+const char *zlog_progname;
+static const char *zlog_protoname;
+
+static const struct facility_map {
+	int facility;
+	const char *name;
+	size_t match;
+} syslog_facilities[] = {
+	{LOG_KERN, "kern", 1},
+	{LOG_USER, "user", 2},
+	{LOG_MAIL, "mail", 1},
+	{LOG_DAEMON, "daemon", 1},
+	{LOG_AUTH, "auth", 1},
+	{LOG_SYSLOG, "syslog", 1},
+	{LOG_LPR, "lpr", 2},
+	{LOG_NEWS, "news", 1},
+	{LOG_UUCP, "uucp", 2},
+	{LOG_CRON, "cron", 1},
+#ifdef LOG_FTP
+	{LOG_FTP, "ftp", 1},
+#endif
+	{LOG_LOCAL0, "local0", 6},
+	{LOG_LOCAL1, "local1", 6},
+	{LOG_LOCAL2, "local2", 6},
+	{LOG_LOCAL3, "local3", 6},
+	{LOG_LOCAL4, "local4", 6},
+	{LOG_LOCAL5, "local5", 6},
+	{LOG_LOCAL6, "local6", 6},
+	{LOG_LOCAL7, "local7", 6},
+	{0, NULL, 0},
+};
+
+static const char * const zlog_priority[] = {
+	"emergencies",   "alerts",	"critical",  "errors", "warnings",
+	"notifications", "informational", "debugging", NULL,
+};
+
+const char *zlog_priority_str(int priority)
+{
+	if (priority > LOG_DEBUG)
+		return "???";
+	return zlog_priority[priority];
+}
+
+const char *facility_name(int facility)
+{
+	const struct facility_map *fm;
+
+	for (fm = syslog_facilities; fm->name; fm++)
+		if (fm->facility == facility)
+			return fm->name;
+	return "";
+}
+
+int facility_match(const char *str)
+{
+	const struct facility_map *fm;
+
+	for (fm = syslog_facilities; fm->name; fm++)
+		if (!strncmp(str, fm->name, fm->match))
+			return fm->facility;
+	return -1;
+}
+
+int log_level_match(const char *s)
+{
+	int level;
+
+	for (level = 0; zlog_priority[level] != NULL; level++)
+		if (!strncmp(s, zlog_priority[level], 2))
+			return level;
+	return ZLOG_DISABLED;
+}
+
+void zlog_rotate(void)
+{
+	zlog_file_rotate(&zt_file);
+	zlog_file_rotate(&zt_filterfile.parent);
+	zlog_file_rotate(&zt_file_cmdline);
+	hook_call(zlog_rotate);
+}
+
+
+void log_show_syslog(struct vty *vty)
+{
+	int level = zlog_syslog_get_prio_min();
+
+	vty_out(vty, "Syslog logging: ");
+	if (level == ZLOG_DISABLED)
+		vty_out(vty, "disabled\n");
+	else
+		vty_out(vty, "level %s, facility %s, ident %s\n",
+			zlog_priority[level],
+			facility_name(zlog_syslog_get_facility()),
+			zlog_progname);
+}
+
+DEFUN_NOSH (show_logging,
+	    show_logging_cmd,
+	    "show logging",
+	    SHOW_STR
+	    "Show current logging configuration\n")
+{
+	int stdout_prio;
+
+	log_show_syslog(vty);
+
+	stdout_prio = stdout_journald_in_use ? zt_stdout_journald.prio_min
+					     : zt_stdout_file.prio_min;
+
+	vty_out(vty, "Stdout logging: ");
+	if (stdout_prio == ZLOG_DISABLED)
+		vty_out(vty, "disabled");
+	else
+		vty_out(vty, "level %s", zlog_priority[stdout_prio]);
+	vty_out(vty, "\n");
+
+	vty_out(vty, "File logging: ");
+	if (zt_file.prio_min == ZLOG_DISABLED || !zt_file.filename)
+		vty_out(vty, "disabled");
+	else
+		vty_out(vty, "level %s, filename %s",
+			zlog_priority[zt_file.prio_min], zt_file.filename);
+	vty_out(vty, "\n");
+
+	if (zt_filterfile.parent.prio_min != ZLOG_DISABLED
+	    && zt_filterfile.parent.filename)
+		vty_out(vty, "Filtered-file logging: level %s, filename %s\n",
+			zlog_priority[zt_filterfile.parent.prio_min],
+			zt_filterfile.parent.filename);
+
+	if (log_cmdline_syslog_lvl != ZLOG_DISABLED)
+		vty_out(vty,
+			"From command line: \"--log syslog --log-level %s\"\n",
+			zlog_priority[log_cmdline_syslog_lvl]);
+	if (log_cmdline_stdout_lvl != ZLOG_DISABLED)
+		vty_out(vty,
+			"From command line: \"--log stdout --log-level %s\"\n",
+			zlog_priority[log_cmdline_stdout_lvl]);
+	if (zt_file_cmdline.prio_min != ZLOG_DISABLED)
+		vty_out(vty,
+			"From command line: \"--log file:%s --log-level %s\"\n",
+			zt_file_cmdline.filename,
+			zlog_priority[zt_file_cmdline.prio_min]);
+
+	vty_out(vty, "Protocol name: %s\n", zlog_protoname);
+	vty_out(vty, "Record priority: %s\n",
+		(zt_file.record_priority ? "enabled" : "disabled"));
+	vty_out(vty, "Timestamp precision: %d\n", zt_file.ts_subsec);
+
+	hook_call(zlog_cli_show, vty);
+	return CMD_SUCCESS;
+}
+
+static void log_stdout_apply_level(void)
+{
+	int maxlvl;
+
+	maxlvl = ZLOG_MAXLVL(log_config_stdout_lvl, log_cmdline_stdout_lvl);
+
+	if (stdout_journald_in_use) {
+		zt_stdout_journald.prio_min = maxlvl;
+		zlog_5424_apply_meta(&zt_stdout_journald);
+	} else {
+		zt_stdout_file.prio_min = maxlvl;
+		zlog_file_set_other(&zt_stdout_file);
+	}
+}
+
+DEFPY (config_log_stdout,
+       config_log_stdout_cmd,
+       "log stdout [<emergencies|alerts|critical|errors|warnings|notifications|informational|debugging>$levelarg]",
+       "Logging control\n"
+       "Set stdout logging level\n"
+       LOG_LEVEL_DESC)
+{
+	int level;
+
+	if (levelarg) {
+		level = log_level_match(levelarg);
+		if (level == ZLOG_DISABLED)
+			return CMD_ERR_NO_MATCH;
+	} else
+		level = log_default_lvl;
+
+	log_config_stdout_lvl = level;
+	log_stdout_apply_level();
+	return CMD_SUCCESS;
+}
+
+DEFUN (no_config_log_stdout,
+       no_config_log_stdout_cmd,
+       "no log stdout [<emergencies|alerts|critical|errors|warnings|notifications|informational|debugging>]",
+       NO_STR
+       "Logging control\n"
+       "Cancel logging to stdout\n"
+       LOG_LEVEL_DESC)
+{
+	log_config_stdout_lvl = ZLOG_DISABLED;
+	log_stdout_apply_level();
+	return CMD_SUCCESS;
+}
+
+DEFUN_HIDDEN (config_log_monitor,
+       config_log_monitor_cmd,
+       "log monitor [<emergencies|alerts|critical|errors|warnings|notifications|informational|debugging>]",
+       "Logging control\n"
+       "Set terminal line (monitor) logging level\n"
+       LOG_LEVEL_DESC)
+{
+	vty_out(vty, "%% \"log monitor\" is deprecated and does nothing.\n");
+	return CMD_SUCCESS;
+}
+
+DEFUN_HIDDEN (no_config_log_monitor,
+       no_config_log_monitor_cmd,
+       "no log monitor [<emergencies|alerts|critical|errors|warnings|notifications|informational|debugging>]",
+       NO_STR
+       "Logging control\n"
+       "Disable terminal line (monitor) logging\n"
+       LOG_LEVEL_DESC)
+{
+	return CMD_SUCCESS;
+}
+
+DEFPY_NOSH (debug_uid_backtrace,
+	    debug_uid_backtrace_cmd,
+	    "[no] debug unique-id UID backtrace",
+	    NO_STR
+	    DEBUG_STR
+	    "Options per individual log message, by unique ID\n"
+	    "Log message unique ID (XXXXX-XXXXX)\n"
+	    "Add backtrace to log when message is printed\n")
+{
+	struct xrefdata search, *xrd;
+	struct xrefdata_logmsg *xrdl;
+	uint8_t flag;
+
+	strlcpy(search.uid, uid, sizeof(search.uid));
+	xrd = xrefdata_uid_find(&xrefdata_uid, &search);
+
+	if (!xrd)
+		return CMD_ERR_NOTHING_TODO;
+
+	if (xrd->xref->type != XREFT_LOGMSG) {
+		vty_out(vty, "%% ID \"%s\" is not a log message\n", uid);
+		return CMD_WARNING;
+	}
+	xrdl = container_of(xrd, struct xrefdata_logmsg, xrefdata);
+
+	flag = (vty->node == CONFIG_NODE) ? LOGMSG_FLAG_PERSISTENT
+					  : LOGMSG_FLAG_EPHEMERAL;
+
+	if ((xrdl->fl_print_bt & flag) == (no ? 0 : flag))
+		return CMD_SUCCESS;
+	if (flag == LOGMSG_FLAG_PERSISTENT)
+		logmsgs_with_persist_bt += no ? -1 : 1;
+
+	xrdl->fl_print_bt ^= flag;
+	return CMD_SUCCESS;
+}
+
+static int set_log_file(struct zlog_cfg_file *target, struct vty *vty,
+			const char *fname, int loglevel)
+{
+	char path[MAXPATHLEN + 1];
+	const char *fullpath;
+	bool ok;
+
+
+	/* Path detection. */
+	if (!IS_DIRECTORY_SEP(*fname)) {
+		char cwd[MAXPATHLEN + 1];
+
+		cwd[MAXPATHLEN] = '\0';
+
+		if (getcwd(cwd, MAXPATHLEN) == NULL) {
+			flog_err_sys(EC_LIB_SYSTEM_CALL,
+				     "config_log_file: Unable to alloc mem!");
+			return CMD_WARNING_CONFIG_FAILED;
+		}
+
+		int pr = snprintf(path, sizeof(path), "%s/%s", cwd, fname);
+		if (pr < 0 || (unsigned int)pr >= sizeof(path)) {
+			flog_err_sys(
+				EC_LIB_SYSTEM_CALL,
+				"%s: Path too long ('%s/%s'); system maximum is %u",
+				__func__, cwd, fname, MAXPATHLEN);
+			return CMD_WARNING_CONFIG_FAILED;
+		}
+
+		fullpath = path;
+	} else
+		fullpath = fname;
+
+	target->prio_min = loglevel;
+	ok = zlog_file_set_filename(target, fullpath);
+
+	if (!ok) {
+		if (vty)
+			vty_out(vty, "can't open logfile %s\n", fname);
+		return CMD_WARNING_CONFIG_FAILED;
+	}
+	return CMD_SUCCESS;
+}
+
+void command_setup_early_logging(const char *dest, const char *level)
+{
+	int nlevel;
+	char *sep;
+	int len;
+	char type[8];
+
+	if (level) {
+		nlevel = log_level_match(level);
+
+		if (nlevel == ZLOG_DISABLED) {
+			fprintf(stderr, "invalid log level \"%s\"\n", level);
+			exit(1);
+		}
+	} else
+		nlevel = log_default_lvl;
+
+	if (!dest)
+		return;
+
+	sep = strchr(dest, ':');
+	len = sep ? (int)(sep - dest) : (int)strlen(dest);
+
+	snprintfrr(type, sizeof(type), "%.*s", len, dest);
+
+	if (strcmp(type, "stdout") == 0) {
+		log_cmdline_stdout_lvl = nlevel;
+		log_stdout_apply_level();
+		return;
+	}
+	if (strcmp(type, "syslog") == 0) {
+		log_cmdline_syslog_lvl = nlevel;
+		zlog_syslog_set_prio_min(ZLOG_MAXLVL(log_config_syslog_lvl,
+						     log_cmdline_syslog_lvl));
+		return;
+	}
+	if (strcmp(type, "file") == 0 && sep) {
+		sep++;
+		set_log_file(&zt_file_cmdline, NULL, sep, nlevel);
+		return;
+	}
+	if (strcmp(type, "monitor") == 0 && sep) {
+		struct zlog_live_cfg cfg = {};
+		unsigned long fd;
+		char *endp;
+
+		sep++;
+		fd = strtoul(sep, &endp, 10);
+		if (!*sep || *endp) {
+			fprintf(stderr, "invalid monitor fd \"%s\"\n", sep);
+			exit(1);
+		}
+
+		zlog_live_open_fd(&cfg, nlevel, fd);
+		zlog_live_disown(&cfg);
+		return;
+	}
+
+	fprintf(stderr, "invalid log target \"%s\" (\"%s\")\n", type, dest);
+	exit(1);
+}
+
+DEFUN (clear_log_cmdline,
+       clear_log_cmdline_cmd,
+       "clear log cmdline-targets",
+       CLEAR_STR
+       "Logging control\n"
+       "Disable log targets specified at startup by --log option\n")
+{
+	zt_file_cmdline.prio_min = ZLOG_DISABLED;
+	zlog_file_set_other(&zt_file_cmdline);
+
+	log_cmdline_syslog_lvl = ZLOG_DISABLED;
+	zlog_syslog_set_prio_min(ZLOG_MAXLVL(log_config_syslog_lvl,
+					     log_cmdline_syslog_lvl));
+
+	log_cmdline_stdout_lvl = ZLOG_DISABLED;
+	log_stdout_apply_level();
+
+	return CMD_SUCCESS;
+}
+
+DEFPY (config_log_file,
+       config_log_file_cmd,
+       "log file FILENAME [<emergencies|alerts|critical|errors|warnings|notifications|informational|debugging>$levelarg]",
+       "Logging control\n"
+       "Logging to file\n"
+       "Logging filename\n"
+       LOG_LEVEL_DESC)
+{
+	int level = log_default_lvl;
+
+	if (levelarg) {
+		level = log_level_match(levelarg);
+		if (level == ZLOG_DISABLED)
+			return CMD_ERR_NO_MATCH;
+	}
+	return set_log_file(&zt_file, vty, filename, level);
+}
+
+DEFUN (no_config_log_file,
+       no_config_log_file_cmd,
+       "no log file [FILENAME [LEVEL]]",
+       NO_STR
+       "Logging control\n"
+       "Cancel logging to file\n"
+       "Logging file name\n"
+       "Logging level\n")
+{
+	zt_file.prio_min = ZLOG_DISABLED;
+	zlog_file_set_other(&zt_file);
+	return CMD_SUCCESS;
+}
+
+DEFPY (config_log_syslog,
+       config_log_syslog_cmd,
+       "log syslog [<emergencies|alerts|critical|errors|warnings|notifications|informational|debugging>$levelarg]",
+       "Logging control\n"
+       "Set syslog logging level\n"
+       LOG_LEVEL_DESC)
+{
+	int level;
+
+	if (levelarg) {
+		level = log_level_match(levelarg);
+
+		if (level == ZLOG_DISABLED)
+			return CMD_ERR_NO_MATCH;
+	} else
+		level = log_default_lvl;
+
+	log_config_syslog_lvl = level;
+	zlog_syslog_set_prio_min(ZLOG_MAXLVL(log_config_syslog_lvl,
+					     log_cmdline_syslog_lvl));
+	return CMD_SUCCESS;
+}
+
+DEFUN (no_config_log_syslog,
+       no_config_log_syslog_cmd,
+       "no log syslog [<kern|user|mail|daemon|auth|syslog|lpr|news|uucp|cron|local0|local1|local2|local3|local4|local5|local6|local7>] [<emergencies|alerts|critical|errors|warnings|notifications|informational|debugging>]",
+       NO_STR
+       "Logging control\n"
+       "Cancel logging to syslog\n"
+       LOG_FACILITY_DESC
+       LOG_LEVEL_DESC)
+{
+	log_config_syslog_lvl = ZLOG_DISABLED;
+	zlog_syslog_set_prio_min(ZLOG_MAXLVL(log_config_syslog_lvl,
+					     log_cmdline_syslog_lvl));
+	return CMD_SUCCESS;
+}
+
+DEFPY (config_log_facility,
+       config_log_facility_cmd,
+       "log facility <kern|user|mail|daemon|auth|syslog|lpr|news|uucp|cron|local0|local1|local2|local3|local4|local5|local6|local7>$facilityarg",
+       "Logging control\n"
+       "Facility parameter for syslog messages\n"
+       LOG_FACILITY_DESC)
+{
+	int facility = facility_match(facilityarg);
+
+	zlog_syslog_set_facility(facility);
+	return CMD_SUCCESS;
+}
+
+DEFUN (no_config_log_facility,
+       no_config_log_facility_cmd,
+       "no log facility [<kern|user|mail|daemon|auth|syslog|lpr|news|uucp|cron|local0|local1|local2|local3|local4|local5|local6|local7>]",
+       NO_STR
+       "Logging control\n"
+       "Reset syslog facility to default (daemon)\n"
+       LOG_FACILITY_DESC)
+{
+	zlog_syslog_set_facility(LOG_DAEMON);
+	return CMD_SUCCESS;
+}
+
+DEFUN (config_log_record_priority,
+       config_log_record_priority_cmd,
+       "log record-priority",
+       "Logging control\n"
+       "Log the priority of the message within the message\n")
+{
+	zt_file.record_priority = true;
+	zlog_file_set_other(&zt_file);
+	if (!stdout_journald_in_use) {
+		zt_stdout_file.record_priority = true;
+		zlog_file_set_other(&zt_stdout_file);
+	}
+	zt_filterfile.parent.record_priority = true;
+	zlog_file_set_other(&zt_filterfile.parent);
+	return CMD_SUCCESS;
+}
+
+DEFUN (no_config_log_record_priority,
+       no_config_log_record_priority_cmd,
+       "no log record-priority",
+       NO_STR
+       "Logging control\n"
+       "Do not log the priority of the message within the message\n")
+{
+	zt_file.record_priority = false;
+	zlog_file_set_other(&zt_file);
+	if (!stdout_journald_in_use) {
+		zt_stdout_file.record_priority = false;
+		zlog_file_set_other(&zt_stdout_file);
+	}
+	zt_filterfile.parent.record_priority = false;
+	zlog_file_set_other(&zt_filterfile.parent);
+	return CMD_SUCCESS;
+}
+
+DEFPY (config_log_timestamp_precision,
+       config_log_timestamp_precision_cmd,
+       "log timestamp precision (0-6)",
+       "Logging control\n"
+       "Timestamp configuration\n"
+       "Set the timestamp precision\n"
+       "Number of subsecond digits\n")
+{
+	zt_file.ts_subsec = precision;
+	zlog_file_set_other(&zt_file);
+	if (!stdout_journald_in_use) {
+		zt_stdout_file.ts_subsec = precision;
+		zlog_file_set_other(&zt_stdout_file);
+	}
+	zt_filterfile.parent.ts_subsec = precision;
+	zlog_file_set_other(&zt_filterfile.parent);
+	return CMD_SUCCESS;
+}
+
+DEFUN (no_config_log_timestamp_precision,
+       no_config_log_timestamp_precision_cmd,
+       "no log timestamp precision [(0-6)]",
+       NO_STR
+       "Logging control\n"
+       "Timestamp configuration\n"
+       "Reset the timestamp precision to the default value of 0\n"
+       "Number of subsecond digits\n")
+{
+	zt_file.ts_subsec = 0;
+	zlog_file_set_other(&zt_file);
+	if (!stdout_journald_in_use) {
+		zt_stdout_file.ts_subsec = 0;
+		zlog_file_set_other(&zt_stdout_file);
+	}
+	zt_filterfile.parent.ts_subsec = 0;
+	zlog_file_set_other(&zt_filterfile.parent);
+	return CMD_SUCCESS;
+}
+
+DEFPY (config_log_ec,
+       config_log_ec_cmd,
+       "[no] log error-category",
+       NO_STR
+       "Logging control\n"
+       "Prefix log message text with [EC 9999] code\n")
+{
+	zlog_set_prefix_ec(!no);
+	return CMD_SUCCESS;
+}
+
+DEFPY (config_log_xid,
+       config_log_xid_cmd,
+       "[no] log unique-id",
+       NO_STR
+       "Logging control\n"
+       "Prefix log message text with [XXXXX-XXXXX] identifier\n")
+{
+	zlog_set_prefix_xid(!no);
+	return CMD_SUCCESS;
+}
+
+DEFPY (config_log_filterfile,
+       config_log_filterfile_cmd,
+       "log filtered-file FILENAME [<emergencies|alerts|critical|errors|warnings|notifications|informational|debugging>$levelarg]",
+       "Logging control\n"
+       "Logging to file with string filter\n"
+       "Logging filename\n"
+       LOG_LEVEL_DESC)
+{
+	int level = log_default_lvl;
+
+	if (levelarg) {
+		level = log_level_match(levelarg);
+		if (level == ZLOG_DISABLED)
+			return CMD_ERR_NO_MATCH;
+	}
+	return set_log_file(&zt_filterfile.parent, vty, filename, level);
+}
+
+DEFUN (no_config_log_filterfile,
+       no_config_log_filterfile_cmd,
+       "no log filtered-file [FILENAME [LEVEL]]",
+       NO_STR
+       "Logging control\n"
+       "Cancel logging to file with string filter\n"
+       "Logging file name\n"
+       "Logging level\n")
+{
+	zt_filterfile.parent.prio_min = ZLOG_DISABLED;
+	zlog_file_set_other(&zt_filterfile.parent);
+	return CMD_SUCCESS;
+}
+
+DEFPY (log_filter,
+       log_filter_cmd,
+       "[no] log filter-text WORD$filter",
+       NO_STR
+       "Logging control\n"
+       FILTER_LOG_STR
+       "String to filter by\n")
+{
+	int ret = 0;
+
+	if (no)
+		ret = zlog_filter_del(filter);
+	else
+		ret = zlog_filter_add(filter);
+
+	if (ret == 1) {
+		vty_out(vty, "%% filter table full\n");
+		return CMD_WARNING;
+	} else if (ret != 0) {
+		vty_out(vty, "%% failed to %s log filter\n",
+			(no ? "remove" : "apply"));
+		return CMD_WARNING;
+	}
+
+	vty_out(vty, " %s\n", filter);
+	return CMD_SUCCESS;
+}
+
+/* Clear all log filters */
+DEFPY (log_filter_clear,
+       log_filter_clear_cmd,
+       "clear log filter-text",
+       CLEAR_STR
+       "Logging control\n"
+       FILTER_LOG_STR)
+{
+	zlog_filter_clear();
+	return CMD_SUCCESS;
+}
+
+/* Show log filter */
+DEFPY (show_log_filter,
+       show_log_filter_cmd,
+       "show logging filter-text",
+       SHOW_STR
+       "Show current logging configuration\n"
+       FILTER_LOG_STR)
+{
+	char log_filters[ZLOG_FILTERS_MAX * (ZLOG_FILTER_LENGTH_MAX + 3)] = "";
+	int len = 0;
+
+	len = zlog_filter_dump(log_filters, sizeof(log_filters));
+
+	if (len == -1) {
+		vty_out(vty, "%% failed to get filters\n");
+		return CMD_WARNING;
+	}
+
+	if (len != 0)
+		vty_out(vty, "%s", log_filters);
+
+	return CMD_SUCCESS;
+}
+
+/* Enable/disable 'immediate' mode, with no output buffering */
+DEFPY (log_immediate_mode,
+       log_immediate_mode_cmd,
+       "[no] log immediate-mode",
+       NO_STR
+       "Logging control"
+       "Output immediately, without buffering")
+{
+	zlog_set_immediate(!no);
+	return CMD_SUCCESS;
+}
+
+void log_config_write(struct vty *vty)
+{
+	bool show_cmdline_hint = false;
+
+	if (zt_file.prio_min != ZLOG_DISABLED && zt_file.filename) {
+		vty_out(vty, "log file %s", zt_file.filename);
+
+		if (zt_file.prio_min != log_default_lvl)
+			vty_out(vty, " %s", zlog_priority[zt_file.prio_min]);
+		vty_out(vty, "\n");
+	}
+
+	if (zt_filterfile.parent.prio_min != ZLOG_DISABLED
+	    && zt_filterfile.parent.filename) {
+		vty_out(vty, "log filtered-file %s",
+			zt_filterfile.parent.filename);
+
+		if (zt_filterfile.parent.prio_min != log_default_lvl)
+			vty_out(vty, " %s",
+				zlog_priority[zt_filterfile.parent.prio_min]);
+		vty_out(vty, "\n");
+	}
+
+	if (log_config_stdout_lvl != ZLOG_DISABLED) {
+		vty_out(vty, "log stdout");
+
+		if (log_config_stdout_lvl != log_default_lvl)
+			vty_out(vty, " %s",
+				zlog_priority[log_config_stdout_lvl]);
+		vty_out(vty, "\n");
+	}
+
+	if (log_config_syslog_lvl != ZLOG_DISABLED) {
+		vty_out(vty, "log syslog");
+
+		if (log_config_syslog_lvl != log_default_lvl)
+			vty_out(vty, " %s",
+				zlog_priority[log_config_syslog_lvl]);
+		vty_out(vty, "\n");
+	}
+
+	if (log_cmdline_syslog_lvl != ZLOG_DISABLED) {
+		vty_out(vty,
+			"! \"log syslog %s\" enabled by \"--log\" startup option\n",
+			zlog_priority[log_cmdline_syslog_lvl]);
+		show_cmdline_hint = true;
+	}
+	if (log_cmdline_stdout_lvl != ZLOG_DISABLED) {
+		vty_out(vty,
+			"! \"log stdout %s\" enabled by \"--log\" startup option\n",
+			zlog_priority[log_cmdline_stdout_lvl]);
+		show_cmdline_hint = true;
+	}
+	if (zt_file_cmdline.prio_min != ZLOG_DISABLED) {
+		vty_out(vty,
+			"! \"log file %s %s\" enabled by \"--log\" startup option\n",
+			zt_file_cmdline.filename,
+			zlog_priority[zt_file_cmdline.prio_min]);
+		show_cmdline_hint = true;
+	}
+	if (show_cmdline_hint)
+		vty_out(vty,
+			"! use \"clear log cmdline-targets\" to remove this target\n");
+
+	if (zlog_syslog_get_facility() != LOG_DAEMON)
+		vty_out(vty, "log facility %s\n",
+			facility_name(zlog_syslog_get_facility()));
+
+	if (zt_file.record_priority == 1)
+		vty_out(vty, "log record-priority\n");
+
+	if (zt_file.ts_subsec > 0)
+		vty_out(vty, "log timestamp precision %d\n",
+			zt_file.ts_subsec);
+
+	if (!zlog_get_prefix_ec())
+		vty_out(vty, "no log error-category\n");
+	if (!zlog_get_prefix_xid())
+		vty_out(vty, "no log unique-id\n");
+
+	if (logmsgs_with_persist_bt) {
+		struct xrefdata *xrd;
+		struct xrefdata_logmsg *xrdl;
+
+		vty_out(vty, "!\n");
+
+		frr_each (xrefdata_uid, &xrefdata_uid, xrd) {
+			if (xrd->xref->type != XREFT_LOGMSG)
+				continue;
+
+			xrdl = container_of(xrd, struct xrefdata_logmsg,
+					    xrefdata);
+			if (xrdl->fl_print_bt & LOGMSG_FLAG_PERSISTENT)
+				vty_out(vty, "debug unique-id %s backtrace\n",
+					xrd->uid);
+		}
+	}
+}
+
+static int log_vty_init(const char *progname, const char *protoname,
+			 unsigned short instance, uid_t uid, gid_t gid)
+{
+	zlog_progname = progname;
+	zlog_protoname = protoname;
+
+	zlog_set_prefix_ec(true);
+	zlog_set_prefix_xid(true);
+
+	zlog_filterfile_init(&zt_filterfile);
+
+	if (sd_stdout_is_journal) {
+		stdout_journald_in_use = true;
+		zlog_5424_init(&zt_stdout_journald);
+		zlog_5424_apply_dst(&zt_stdout_journald);
+	} else
+		zlog_file_set_fd(&zt_stdout_file, STDOUT_FILENO);
+	return 0;
+}
+
+__attribute__((_CONSTRUCTOR(475))) static void log_vty_preinit(void)
+{
+	hook_register(zlog_init, log_vty_init);
+}
+
+void log_cmd_init(void)
+{
+	install_element(VIEW_NODE, &show_logging_cmd);
+	install_element(ENABLE_NODE, &clear_log_cmdline_cmd);
+
+	install_element(CONFIG_NODE, &config_log_stdout_cmd);
+	install_element(CONFIG_NODE, &no_config_log_stdout_cmd);
+	install_element(CONFIG_NODE, &config_log_monitor_cmd);
+	install_element(CONFIG_NODE, &no_config_log_monitor_cmd);
+	install_element(CONFIG_NODE, &config_log_file_cmd);
+	install_element(CONFIG_NODE, &no_config_log_file_cmd);
+	install_element(CONFIG_NODE, &config_log_syslog_cmd);
+	install_element(CONFIG_NODE, &no_config_log_syslog_cmd);
+	install_element(CONFIG_NODE, &config_log_facility_cmd);
+	install_element(CONFIG_NODE, &no_config_log_facility_cmd);
+	install_element(CONFIG_NODE, &config_log_record_priority_cmd);
+	install_element(CONFIG_NODE, &no_config_log_record_priority_cmd);
+	install_element(CONFIG_NODE, &config_log_timestamp_precision_cmd);
+	install_element(CONFIG_NODE, &no_config_log_timestamp_precision_cmd);
+	install_element(CONFIG_NODE, &config_log_ec_cmd);
+	install_element(CONFIG_NODE, &config_log_xid_cmd);
+
+	install_element(VIEW_NODE, &show_log_filter_cmd);
+	install_element(CONFIG_NODE, &log_filter_cmd);
+	install_element(CONFIG_NODE, &log_filter_clear_cmd);
+	install_element(CONFIG_NODE, &config_log_filterfile_cmd);
+	install_element(CONFIG_NODE, &no_config_log_filterfile_cmd);
+	install_element(CONFIG_NODE, &log_immediate_mode_cmd);
+
+	install_element(ENABLE_NODE, &debug_uid_backtrace_cmd);
+	install_element(CONFIG_NODE, &debug_uid_backtrace_cmd);
+
+	log_5424_cmd_init();
+}