diff --git a/bin/dig/dig.c b/bin/dig/dig.c
index 546399c9d6..9438ae0826 100644
--- a/bin/dig/dig.c
+++ b/bin/dig/dig.c
@@ -3045,11 +3045,6 @@ dig_startup(void) {
 	isc_loopmgr_run(loopmgr);
 }
 
-void
-dig_query_start(void) {
-	start_lookup();
-}
-
 void
 dig_shutdown(void) {
 	destroy_lookup(default_lookup);
diff --git a/bin/dig/dighost.h b/bin/dig/dighost.h
index 0b2ad0dc5d..0587ce1403 100644
--- a/bin/dig/dighost.h
+++ b/bin/dig/dighost.h
@@ -444,12 +444,6 @@ dig_query_setup(bool, bool, int argc, char **argv);
 void
 dig_startup(void);
 
-/*%
- * Initiates the next lookup cycle
- */
-void
-dig_query_start(void);
-
 /*%
  * Activate/deactivate IDN filtering of output.
  */
diff --git a/bin/dnssec/dnssec-signzone.c b/bin/dnssec/dnssec-signzone.c
index 835dc2737a..6f2328c72e 100644
--- a/bin/dnssec/dnssec-signzone.c
+++ b/bin/dnssec/dnssec-signzone.c
@@ -3913,11 +3913,7 @@ main(int argc, char *argv[]) {
 		result = isc_file_mktemplate(output, tempfile, tempfilelen);
 		check_result(result, "isc_file_mktemplate");
 
-		if (outputformat == dns_masterformat_text) {
-			result = isc_file_openunique(tempfile, &outfp);
-		} else {
-			result = isc_file_bopenunique(tempfile, &outfp);
-		}
+		result = isc_file_openunique(tempfile, &outfp);
 		if (result != ISC_R_SUCCESS) {
 			fatal("failed to open temporary output file: %s",
 			      isc_result_totext(result));
diff --git a/lib/dns/masterdump.c b/lib/dns/masterdump.c
index d07919c41f..d9cdcb786e 100644
--- a/lib/dns/masterdump.c
+++ b/lib/dns/masterdump.c
@@ -1791,8 +1791,7 @@ dns_master_dumptostream(isc_mem_t *mctx, dns_db_t *db, dns_dbversion_t *version,
 }
 
 static isc_result_t
-opentmp(isc_mem_t *mctx, dns_masterformat_t format, const char *file,
-	char **tempp, FILE **fp) {
+opentmp(isc_mem_t *mctx, const char *file, char **tempp, FILE **fp) {
 	FILE *f = NULL;
 	isc_result_t result;
 	char *tempname = NULL;
@@ -1806,11 +1805,7 @@ opentmp(isc_mem_t *mctx, dns_masterformat_t format, const char *file,
 		goto cleanup;
 	}
 
-	if (format == dns_masterformat_text) {
-		result = isc_file_openunique(tempname, &f);
-	} else {
-		result = isc_file_bopenunique(tempname, &f);
-	}
+	result = isc_file_openunique(tempname, &f);
 	if (result != ISC_R_SUCCESS) {
 		isc_log_write(dns_lctx, ISC_LOGCATEGORY_GENERAL,
 			      DNS_LOGMODULE_MASTERDUMP, ISC_LOG_ERROR,
@@ -1846,7 +1841,7 @@ dns_master_dumpasync(isc_mem_t *mctx, dns_db_t *db, dns_dbversion_t *version,
 
 	file = isc_mem_strdup(mctx, filename);
 
-	result = opentmp(mctx, format, filename, &tempname, &f);
+	result = opentmp(mctx, filename, &tempname, &f);
 	if (result != ISC_R_SUCCESS) {
 		goto cleanup_file;
 	}
@@ -1887,7 +1882,7 @@ dns_master_dump(isc_mem_t *mctx, dns_db_t *db, dns_dbversion_t *version,
 	char *tempname;
 	dns_dumpctx_t *dctx = NULL;
 
-	result = opentmp(mctx, format, filename, &tempname, &f);
+	result = opentmp(mctx, filename, &tempname, &f);
 	if (result != ISC_R_SUCCESS) {
 		return (result);
 	}
diff --git a/lib/isc/dir.c b/lib/isc/dir.c
index b7eabe9a6f..473618cb57 100644
--- a/lib/isc/dir.c
+++ b/lib/isc/dir.c
@@ -193,76 +193,3 @@ isc_dir_chroot(const char *dirname) {
 	return (ISC_R_NOTIMPLEMENTED);
 #endif /* ifdef HAVE_CHROOT */
 }
-
-isc_result_t
-isc_dir_createunique(char *templet) {
-	isc_result_t result;
-	char *x;
-	char *p;
-	int i;
-	int pid;
-
-	REQUIRE(templet != NULL);
-
-	/*!
-	 * \brief mkdtemp is not portable, so this emulates it.
-	 */
-
-	pid = getpid();
-
-	/*
-	 * Replace trailing Xs with the process-id, zero-filled.
-	 */
-	for (x = templet + strlen(templet) - 1; *x == 'X' && x >= templet;
-	     x--, pid /= 10)
-	{
-		*x = pid % 10 + '0';
-	}
-
-	x++; /* Set x to start of ex-Xs. */
-
-	do {
-		i = mkdir(templet, 0700);
-		if (i == 0 || errno != EEXIST) {
-			break;
-		}
-
-		/*
-		 * The BSD algorithm.
-		 */
-		p = x;
-		while (*p != '\0') {
-			if (isdigit((unsigned char)*p)) {
-				*p = 'a';
-			} else if (*p != 'z') {
-				++*p;
-			} else {
-				/*
-				 * Reset character and move to next.
-				 */
-				*p++ = 'a';
-				continue;
-			}
-
-			break;
-		}
-
-		if (*p == '\0') {
-			/*
-			 * Tried all combinations.  errno should already
-			 * be EEXIST, but ensure it is anyway for
-			 * isc__errno2result().
-			 */
-			errno = EEXIST;
-			break;
-		}
-	} while (1);
-
-	if (i == -1) {
-		result = isc__errno2result(errno);
-	} else {
-		result = ISC_R_SUCCESS;
-	}
-
-	return (result);
-}
diff --git a/lib/isc/file.c b/lib/isc/file.c
index bdf65fb460..a1aed8e164 100644
--- a/lib/isc/file.c
+++ b/lib/isc/file.c
@@ -383,23 +383,6 @@ isc_file_openuniquemode(char *templet, int mode, FILE **fp) {
 	return (result);
 }
 
-isc_result_t
-isc_file_bopenunique(char *templet, FILE **fp) {
-	int mode = S_IWUSR | S_IRUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
-	return (isc_file_openuniquemode(templet, mode, fp));
-}
-
-isc_result_t
-isc_file_bopenuniqueprivate(char *templet, FILE **fp) {
-	int mode = S_IWUSR | S_IRUSR;
-	return (isc_file_openuniquemode(templet, mode, fp));
-}
-
-isc_result_t
-isc_file_bopenuniquemode(char *templet, int mode, FILE **fp) {
-	return (isc_file_openuniquemode(templet, mode, fp));
-}
-
 isc_result_t
 isc_file_remove(const char *filename) {
 	int r;
diff --git a/lib/isc/include/isc/dir.h b/lib/isc/include/isc/dir.h
index c1ff2c7192..90c327ecb4 100644
--- a/lib/isc/include/isc/dir.h
+++ b/lib/isc/include/isc/dir.h
@@ -68,13 +68,4 @@ isc_dir_chdir(const char *dirname);
 isc_result_t
 isc_dir_chroot(const char *dirname);
 
-isc_result_t
-isc_dir_createunique(char *templet);
-/*!<
- * Use a templet (such as from isc_file_mktemplate()) to create a uniquely
- * named, empty directory.  The templet string is modified in place.
- * If result == ISC_R_SUCCESS, it is the name of the directory that was
- * created.
- */
-
 ISC_LANG_ENDDECLS
diff --git a/lib/isc/include/isc/file.h b/lib/isc/include/isc/file.h
index f78c5c580c..46d0f9246a 100644
--- a/lib/isc/include/isc/file.h
+++ b/lib/isc/include/isc/file.h
@@ -102,16 +102,8 @@ isc_result_t
 isc_file_openuniqueprivate(char *templet, FILE **fp);
 isc_result_t
 isc_file_openuniquemode(char *templet, int mode, FILE **fp);
-isc_result_t
-isc_file_bopenunique(char *templet, FILE **fp);
-isc_result_t
-isc_file_bopenuniqueprivate(char *templet, FILE **fp);
-isc_result_t
-isc_file_bopenuniquemode(char *templet, int mode, FILE **fp);
 /*!<
  * \brief Create and open a file with a unique name based on 'templet'.
- *	isc_file_bopen*() open the file in binary mode in Windows.
- *	isc_file_open*() open the file in text mode in Windows.
  *
  * Notes:
  *\li	'template' is a reserved work in C++.  If you want to complain
@@ -312,8 +304,8 @@ isc_result_t
 isc_file_splitpath(isc_mem_t *mctx, const char *path, char **dirname,
 		   char const **basename);
 /*%<
- * Split a path into dirname and basename.  If 'path' contains no slash
- * (or, on windows, backslash), then '*dirname' is set to ".".
+ * Split a path into dirname and basename.  If 'path' contains no slash,
+ * then '*dirname' is set to ".".
  *
  * Allocates memory for '*dirname', which can be freed with isc_mem_free().
  *
diff --git a/lib/ns/include/ns/interfacemgr.h b/lib/ns/include/ns/interfacemgr.h
index 4c248dec23..317b722405 100644
--- a/lib/ns/include/ns/interfacemgr.h
+++ b/lib/ns/include/ns/interfacemgr.h
@@ -127,13 +127,6 @@ ns_interfacemgr_setbacklog(ns_interfacemgr_t *mgr, int backlog);
  * Set the size of the listen() backlog queue.
  */
 
-bool
-ns_interfacemgr_islistening(ns_interfacemgr_t *mgr);
-/*%<
- * Return if the manager is listening on any interface. It can be called
- * after a scan or adjust.
- */
-
 isc_result_t
 ns_interfacemgr_scan(ns_interfacemgr_t *mgr, bool verbose, bool config);
 /*%<
diff --git a/lib/ns/include/ns/sortlist.h b/lib/ns/include/ns/sortlist.h
index 3333e9cd49..baac9fd16a 100644
--- a/lib/ns/include/ns/sortlist.h
+++ b/lib/ns/include/ns/sortlist.h
@@ -66,15 +66,3 @@ ns_sortlist_addrorder2(const isc_netaddr_t *addr, const void *arg);
  * ACL forming the second element in a 2-element top-level
  * sortlist statement.
  */
-
-void
-ns_sortlist_byaddrsetup(dns_acl_t *sortlist_acl, dns_aclenv_t *env,
-			isc_netaddr_t	       *client_addr,
-			dns_addressorderfunc_t *orderp, void **argp);
-/*%<
- * Find the sortlist statement in 'acl' that applies to 'clientaddr', if any.
- * If a sortlist statement applies, return in '*orderp' a pointer to a function
- * for ranking network addresses based on that sortlist statement, and in
- * '*argp' an argument to pass to said function.  If no sortlist statement
- * applies, set '*orderp' and '*argp' to NULL.
- */
diff --git a/lib/ns/interfacemgr.c b/lib/ns/interfacemgr.c
index d10f41c0c2..c159369a64 100644
--- a/lib/ns/interfacemgr.c
+++ b/lib/ns/interfacemgr.c
@@ -1349,13 +1349,6 @@ ns_interfacemgr_scan(ns_interfacemgr_t *mgr, bool verbose, bool config) {
 	return (result);
 }
 
-bool
-ns_interfacemgr_islistening(ns_interfacemgr_t *mgr) {
-	REQUIRE(NS_INTERFACEMGR_VALID(mgr));
-
-	return (ISC_LIST_EMPTY(mgr->interfaces) ? false : true);
-}
-
 void
 ns_interfacemgr_setlistenon4(ns_interfacemgr_t *mgr, ns_listenlist_t *value) {
 	REQUIRE(NS_INTERFACEMGR_VALID(mgr));
diff --git a/lib/ns/sortlist.c b/lib/ns/sortlist.c
index 2aada90b19..971edb60d2 100644
--- a/lib/ns/sortlist.c
+++ b/lib/ns/sortlist.c
@@ -153,29 +153,3 @@ ns_sortlist_addrorder1(const isc_netaddr_t *addr, const void *arg) {
 
 	return (INT_MAX);
 }
-
-void
-ns_sortlist_byaddrsetup(dns_acl_t *sortlist_acl, dns_aclenv_t *env,
-			isc_netaddr_t *client_addr,
-			dns_addressorderfunc_t *orderp, void **argp) {
-	ns_sortlisttype_t sortlisttype;
-
-	sortlisttype = ns_sortlist_setup(sortlist_acl, env, client_addr, argp);
-
-	switch (sortlisttype) {
-	case NS_SORTLISTTYPE_1ELEMENT:
-		*orderp = ns_sortlist_addrorder1;
-		break;
-	case NS_SORTLISTTYPE_2ELEMENT:
-		*orderp = ns_sortlist_addrorder2;
-		break;
-	case NS_SORTLISTTYPE_NONE:
-		*orderp = NULL;
-		break;
-	default:
-		UNEXPECTED_ERROR(
-			"unexpected return from ns_sortlist_setup(): %d",
-			sortlisttype);
-		break;
-	}
-}