resolv: Move fp_nquery, fp_query, p_query, _res_opcodes

From res_data.c to res_debug.c.

Also drop the unnecessary _res initialization from fp_nquery.

ChangeLog

@@ -1,3 +1,16 @@
+2017-06-30  Florian Weimer  <fweimer@redhat.com>
+
+	* include/resolv.h (res_pquery): Remove declaration.
+	* resolv/res_data.c (fp_nquery, fp_query, p_query): Remove
+	functions.
+	(_res_opcodes): Remove variable.
+	* resolv/res_debug.c (do_section): Receive pfcode instead of
+	statp.
+	(res_pquery): Rename ...
+	(fp_nquery): to this function.  Skip unnecessary _res
+	initialization.
+	(fp_query, p_query, _res_opcodes): Copied from resolv/res_data.c.
+
 2017-06-30  Florian Weimer  <fweimer@redhat.com>
 
 	* resolv/res_debug.h: Remove file.

include/resolv.h

@@ -32,8 +32,6 @@ extern struct hostent *_gethtbyname2 (const char *__name, int __af);
 struct hostent *_gethtbyaddr (const char *addr, size_t __len, int __af);
 extern uint32_t _getlong (const unsigned char *__src);
 extern uint16_t _getshort (const unsigned char *__src);
-extern void res_pquery (const res_state __statp, const unsigned char *__msg,
-			int __len, FILE *__file);
 extern int res_ourserver_p (const res_state __statp,
 			    const struct sockaddr_in6 *__inp);
 extern void __res_iclose (res_state statp, bool free_addr);

resolv/res_data.c

@@ -32,46 +32,6 @@
 #include <string.h>
 #include <unistd.h>
 
-const char *_res_opcodes[] = {
-	"QUERY",
-	"IQUERY",
-	"CQUERYM",
-	"CQUERYU",	/* experimental */
-	"NOTIFY",	/* experimental */
-	"UPDATE",
-	"6",
-	"7",
-	"8",
-	"9",
-	"10",
-	"11",
-	"12",
-	"13",
-	"ZONEINIT",
-	"ZONEREF",
-};
-libresolv_hidden_data_def (_res_opcodes)
-
-void
-p_query(const u_char *msg) {
-	fp_query(msg, stdout);
-}
-
-void
-fp_query(const u_char *msg, FILE *file) {
-	fp_nquery(msg, PACKETSZ, file);
-}
-libresolv_hidden_def (fp_query)
-
-void
-fp_nquery(const u_char *msg, int len, FILE *file) {
-	if (__res_maybe_init (&_res, 0) == -1)
-		return;
-
-	res_pquery(&_res, msg, len, file);
-}
-libresolv_hidden_def (fp_nquery)
-
 int
 res_query(const char *name,	/* domain name */
 	  int class, int type,	/* class and type of query */

resolv/res_debug.c

@@ -115,6 +115,27 @@
 
 extern const char *_res_sectioncodes[] attribute_hidden;
 
+const char *_res_opcodes[] =
+  {
+    "QUERY",
+    "IQUERY",
+    "CQUERYM",
+    "CQUERYU",	/* experimental */
+    "NOTIFY",	/* experimental */
+    "UPDATE",
+    "6",
+    "7",
+    "8",
+    "9",
+    "10",
+    "11",
+    "12",
+    "13",
+    "ZONEINIT",
+    "ZONEREF",
+  };
+libresolv_hidden_data_def (_res_opcodes)
+
 static const char *p_section(int section, int opcode);
 
 /*
@@ -132,9 +153,7 @@ fp_resstat(const res_state statp, FILE *file) {
 }
 
 static void
-do_section(const res_state statp,
+do_section (int pfcode, ns_msg *handle, ns_sect section, int pflag, FILE *file)
-	   ns_msg *handle, ns_sect section,
-	   int pflag, FILE *file)
 {
 	int n, sflag, rrnum;
 	static int buflen = 2048;
@@ -145,8 +164,8 @@ do_section(const res_state statp,
 	/*
 	 * Print answer records.
 	 */
-	sflag = (statp->pfcode & pflag);
+	sflag = (pfcode & pflag);
-	if (statp->pfcode && !sflag)
+	if (pfcode && !sflag)
 		return;
 
 	buf = malloc(buflen);
@@ -163,11 +182,11 @@ do_section(const res_state statp,
 				fprintf(file, ";; ns_parserr: %s\n",
 					strerror(errno));
 			else if (rrnum > 0 && sflag != 0 &&
-				 (statp->pfcode & RES_PRF_HEAD1))
+				 (pfcode & RES_PRF_HEAD1))
 				putc('\n', file);
 			goto cleanup;
 		}
-		if (rrnum == 0 && sflag != 0 && (statp->pfcode & RES_PRF_HEAD1))
+		if (rrnum == 0 && sflag != 0 && (pfcode & RES_PRF_HEAD1))
 			fprintf(file, ";; %s SECTION:\n",
 				p_section(section, opcode));
 		if (section == ns_s_qd)
@@ -209,11 +228,19 @@ do_section(const res_state statp,
  * This is intended to be primarily a debugging routine.
  */
 void
-res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) {
+fp_nquery (const unsigned char *msg, int len, FILE *file)
+{
 	ns_msg handle;
 	int qdcount, ancount, nscount, arcount;
 	u_int opcode, rcode, id;
 
+	/* There is no need to initialize _res: If _res is not yet
+	   initialized, _res.pfcode is zero.  But initialization will
+	   leave it at zero, too.  _res.pfcode is an unsigned long,
+	   but the code here assumes that the flags fit into an int,
+	   so use that.  */
+	int pfcode = _res.pfcode;
+
 	if (ns_initparse(msg, len, &handle) < 0) {
 		fprintf(file, ";; ns_initparse: %s\n", strerror(errno));
 		return;
@@ -229,13 +256,13 @@ res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) {
 	/*
 	 * Print header fields.
 	 */
-	if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX) || rcode)
+	if ((!pfcode) || (pfcode & RES_PRF_HEADX) || rcode)
 		fprintf(file,
 			";; ->>HEADER<<- opcode: %s, status: %s, id: %d\n",
 			_res_opcodes[opcode], p_rcode(rcode), id);
-	if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEADX))
+	if ((!pfcode) || (pfcode & RES_PRF_HEADX))
 		putc(';', file);
-	if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD2)) {
+	if ((!pfcode) || (pfcode & RES_PRF_HEAD2)) {
 		fprintf(file, "; flags:");
 		if (ns_msg_getflag(handle, ns_f_qr))
 			fprintf(file, " qr");
@@ -254,7 +281,7 @@ res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) {
 		if (ns_msg_getflag(handle, ns_f_cd))
 			fprintf(file, " cd");
 	}
-	if ((!statp->pfcode) || (statp->pfcode & RES_PRF_HEAD1)) {
+	if ((!pfcode) || (pfcode & RES_PRF_HEAD1)) {
 		fprintf(file, "; %s: %d",
 			p_section(ns_s_qd, opcode), qdcount);
 		fprintf(file, ", %s: %d",
@@ -264,21 +291,35 @@ res_pquery(const res_state statp, const u_char *msg, int len, FILE *file) {
 		fprintf(file, ", %s: %d",
 			p_section(ns_s_ar, opcode), arcount);
 	}
-	if ((!statp->pfcode) || (statp->pfcode &
+	if ((!pfcode) || (pfcode &
 		(RES_PRF_HEADX | RES_PRF_HEAD2 | RES_PRF_HEAD1))) {
 		putc('\n',file);
 	}
 	/*
 	 * Print the various sections.
 	 */
-	do_section(statp, &handle, ns_s_qd, RES_PRF_QUES, file);
+	do_section (pfcode, &handle, ns_s_qd, RES_PRF_QUES, file);
-	do_section(statp, &handle, ns_s_an, RES_PRF_ANS, file);
+	do_section (pfcode, &handle, ns_s_an, RES_PRF_ANS, file);
-	do_section(statp, &handle, ns_s_ns, RES_PRF_AUTH, file);
+	do_section (pfcode, &handle, ns_s_ns, RES_PRF_AUTH, file);
-	do_section(statp, &handle, ns_s_ar, RES_PRF_ADD, file);
+	do_section (pfcode, &handle, ns_s_ar, RES_PRF_ADD, file);
 	if (qdcount == 0 && ancount == 0 &&
 	    nscount == 0 && arcount == 0)
 		putc('\n', file);
 }
+libresolv_hidden_def (fp_nquery)
+
+void
+fp_query (const unsigned char *msg, FILE *file)
+{
+  fp_nquery (msg, PACKETSZ, file);
+}
+libresolv_hidden_def (fp_query)
+
+void
+p_query (const unsigned char *msg)
+{
+  fp_query (msg, stdout);
+}
 
 const u_char *
 p_cdnname(const u_char *cp, const u_char *msg, int len, FILE *file) {