[master] GCC 9 compilation errors fixed.

Merge branch '15-confpars-c-has-invalid-error-messages-when-memory-allocation-fails'

RELNOTES

@@ -135,6 +135,10 @@ by Eric Young (eay@cryptsoft.com).
   and submitting a patch.
   [ISC-Bugs #13,!7	git dfcbe359ab278cad70015994ca73ef50d626b23a]
 
+- Made minor changes to eliminate warnings when compiled with GCC 9.
+  Thanks to Brett Neumeier for bringing the matter to our attention.
+  [ISC-Bugs #15,!10	git c138f38bd00ceca4e1e51a4db7542a15ef79babd]
+
 		Changes since 4.4.0 (New Features)
 - none
 		Changes since 4.4.0 (Bug Fixes)

common/discover.c

@@ -643,7 +643,9 @@ discover_interfaces(int state) {
 				log_fatal("Error allocating interface %s: %s",
 					  info.name, isc_result_totext(status));
 			}
-			strncpy(tmp->name, info.name, sizeof(tmp->name) - 1);
+
+			memcpy(tmp->name, info.name, sizeof(tmp->name));
+
 			interface_snorf(tmp, ir);
 			interface_dereference(&tmp, MDL);
 			tmp = interfaces; /* XXX */

common/parse.c

@@ -3,7 +3,7 @@
    Common parser code for dhcpd and dhclient. */
 
 /*
- * Copyright (c) 2004-2017 by Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (c) 2004-2019 by Internet Systems Consortium, Inc. ("ISC")
  * Copyright (c) 1995-2003 by Internet Software Consortium
  *
  * This Source Code Form is subject to the terms of the Mozilla Public
@@ -5566,19 +5566,25 @@ int parse_warn (struct parse *cfile, const char *fmt, ...)
 {
 	va_list list;
 	char lexbuf [256];
-	char mbuf [1024];
+	char mbuf [1024];  /* errorwarn.c CVT_BUF_MAX + 1 */
-	char fbuf [1024];
+	char fbuf [2048];
+	char final[4096];
 	unsigned i, lix;
 
-	do_percentm (mbuf, fmt);
+	/* Replace %m in fmt with errno error text */
+	do_percentm (mbuf, sizeof(mbuf), fmt);
+
 	/* %Audit% This is log output. %2004.06.17,Safe%
 	 * If we truncate we hope the user can get a hint from the log.
 	 */
+
+	/* Prepend the file and line number */
 	snprintf (fbuf, sizeof fbuf, "%s line %d: %s",
 		  cfile -> tlname, cfile -> lexline, mbuf);
 
+	/* Now add the var args to the format for the final log message. */
 	va_start (list, fmt);
-	vsnprintf (mbuf, sizeof mbuf, fbuf, list);
+	vsnprintf (final, sizeof final, fbuf, list);
 	va_end (list);
 
 	lix = 0;
@@ -5594,14 +5600,14 @@ int parse_warn (struct parse *cfile, const char *fmt, ...)
 	lexbuf [lix] = 0;
 
 #ifndef DEBUG
-	syslog (LOG_ERR, "%s", mbuf);
+	syslog (LOG_ERR, "%s", final);
 	syslog (LOG_ERR, "%s", cfile -> token_line);
 	if (cfile -> lexchar < 81)
 		syslog (LOG_ERR, "%s^", lexbuf);
 #endif
 
 	if (log_perror) {
-		IGNORE_RET (write (STDERR_FILENO, mbuf, strlen (mbuf)));
+		IGNORE_RET (write (STDERR_FILENO, final, strlen (final)));
 		IGNORE_RET (write (STDERR_FILENO, "\n", 1));
 		IGNORE_RET (write (STDERR_FILENO, cfile -> token_line,
 				   strlen (cfile -> token_line)));

includes/dhcpd.h

@@ -3,7 +3,7 @@
    Definitions for dhcpd... */
 
 /*
- * Copyright (c) 2004-2018 by Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (c) 2004-2019 by Internet Systems Consortium, Inc. ("ISC")
  * Copyright (c) 1996-2003 by Internet Software Consortium
  *
  * This Source Code Form is subject to the terms of the Mozilla Public
@@ -1393,6 +1393,7 @@ struct interface_info {
 	unsigned remote_id_len;		/* Length of Remote ID. */
 
 	char name [IFNAMSIZ];		/* Its name... */
+
 	int index;			/* Its if_nametoindex(). */
 	int rfdesc;			/* Its read file descriptor. */
 	int wfdesc;			/* Its write file descriptor, if

includes/omapip/omapip_p.h

@@ -288,7 +288,8 @@ int log_info (const char *, ...)
 	__attribute__((__format__(__printf__,1,2)));
 int log_debug (const char *, ...)
 	__attribute__((__format__(__printf__,1,2)));
-void do_percentm (char *obuf, const char *ibuf);
+
+void do_percentm (char *obuf, size_t obufsize, const char *ibuf);
 
 isc_result_t uerr2isc (int);
 isc_result_t ns_rcode_to_isc (int);

omapip/errwarn.c

@@ -54,7 +54,7 @@ void log_fatal (const char * fmt, ... )
 {
   va_list list;
 
-  do_percentm (fbuf, fmt);
+  do_percentm (fbuf, sizeof fbuf, fmt);
 
   /* %Audit% This is log output. %2004.06.17,Safe%
    * If we truncate we hope the user can get a hint from the log.
@@ -93,7 +93,7 @@ int log_error (const char * fmt, ...)
 {
   va_list list;
 
-  do_percentm (fbuf, fmt);
+  do_percentm (fbuf, sizeof fbuf, fmt);
 
   /* %Audit% This is log output. %2004.06.17,Safe%
    * If we truncate we hope the user can get a hint from the log.
@@ -120,7 +120,7 @@ int log_info (const char *fmt, ...)
 {
   va_list list;
 
-  do_percentm (fbuf, fmt);
+  do_percentm (fbuf, sizeof fbuf, fmt);
 
   /* %Audit% This is log output. %2004.06.17,Safe%
    * If we truncate we hope the user can get a hint from the log.
@@ -147,7 +147,7 @@ int log_debug (const char *fmt, ...)
 {
   va_list list;
 
-  do_percentm (fbuf, fmt);
+  do_percentm (fbuf, sizeof fbuf, fmt);
 
   /* %Audit% This is log output. %2004.06.17,Safe%
    * If we truncate we hope the user can get a hint from the log.
@@ -170,8 +170,9 @@ int log_debug (const char *fmt, ...)
 
 /* Find %m in the input string and substitute an error message string. */
 
-void do_percentm (obuf, ibuf)
+void do_percentm (obuf, obufsize, ibuf)
      char *obuf;
+     size_t obufsize;
      const char *ibuf;
 {
 	const char *s = ibuf;
@@ -191,13 +192,13 @@ void do_percentm (obuf, ibuf)
 				if (!m)
 					m = "<unknown error>";
 				len += strlen (m);
-				if (len > CVT_BUF_MAX)
+				if (len > obufsize - 1)
 					goto out;
 				strcpy (p - 1, m);
 				p += strlen (p);
 				++s;
 			} else {
-				if (++len > CVT_BUF_MAX)
+				if (++len > obufsize - 1)
 					goto out;
 				*p++ = *s++;
 			}
@@ -205,7 +206,7 @@ void do_percentm (obuf, ibuf)
 		} else {
 			if (*s == '%')
 				infmt = 1;
-			if (++len > CVT_BUF_MAX)
+			if (++len > obufsize - 1)
 				goto out;
 			*p++ = *s++;
 		}

relay/dhcrelay.c

@@ -3,7 +3,7 @@
    DHCP/BOOTP Relay Agent. */
 
 /*
- * Copyright(c) 2004-2018 by Internet Systems Consortium, Inc.("ISC")
+ * Copyright(c) 2004-2019 by Internet Systems Consortium, Inc.("ISC")
  * Copyright(c) 1997-2003 by Internet Software Consortium
  *
  * This Source Code Form is subject to the terms of the Mozilla Public
@@ -2119,7 +2119,7 @@ void request_v4_interface(const char* name, int flags) {
 		  (flags & INTERFACE_UPSTREAM ? 'Y' : 'N'),
 		  (flags & INTERFACE_DOWNSTREAM ? 'Y' : 'N'));
 
-        strncpy(tmp->name, name, len);
+        memcpy(tmp->name, name, len);
         interface_snorf(tmp, (INTERFACE_REQUESTED | flags));
         interface_dereference(&tmp, MDL);
 }

server/confpars.c

@@ -3,7 +3,7 @@
    Parser for dhcpd config file... */
 
 /*
- * Copyright (c) 2004-2017 by Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (c) 2004-2019 by Internet Systems Consortium, Inc. ("ISC")
  * Copyright (c) 1995-2003 by Internet Software Consortium
  *
  * This Source Code Form is subject to the terms of the Mozilla Public
@@ -911,7 +911,7 @@ void parse_failover_peer (cfile, group, type)
 	if (is_identifier (token) || token == STRING) {
 		name = dmalloc (strlen (val) + 1, MDL);
 		if (!name)
-			log_fatal ("no memory for peer name %s", name);
+			log_fatal ("no memory for peer name %s", val);
 		strcpy (name, val);
 	} else {
 		parse_warn (cfile, "expecting failover peer name.");
@@ -1226,7 +1226,7 @@ void parse_failover_state_declaration (struct parse *cfile,
 			name = dmalloc (strlen (val) + 1, MDL);
 			if (!name)
 				log_fatal ("failover peer name %s: no memory",
-					   name);
+					   val);
 			strcpy (name, val);
 		} else {
 			parse_warn (cfile, "expecting failover peer name.");