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From: Hajimu UMEMOTO <ume@FreeBSD.org>
Date: Sun, 15 Aug 2010 16:28:09 +0000 (UTC)
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Subject: svn commit: r211340 - head/lib/libc/net
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Author: ume
Date: Sun Aug 15 16:28:08 2010
New Revision: 211340
URL: http://svn.freebsd.org/changeset/base/211340

Log:
  Correct the return code from _dns_gethostby*() to correspond
  with h_errno.
  
  Obtained from:	NetBSD
  MFC after:	2 weeks

Modified:
  head/lib/libc/net/gethostbydns.c

Modified: head/lib/libc/net/gethostbydns.c
==============================================================================
--- head/lib/libc/net/gethostbydns.c	Sun Aug 15 15:33:01 2010	(r211339)
+++ head/lib/libc/net/gethostbydns.c	Sun Aug 15 16:28:08 2010	(r211340)
@@ -522,18 +522,26 @@ _dns_gethostbyname(void *rval, void *cb_
 		free(buf);
 		dprintf("res_nsearch failed (%d)\n", n, statp);
 		*h_errnop = statp->res_h_errno;
-		return (0);
+		return (NS_NOTFOUND);
 	} else if (n > sizeof(buf->buf)) {
 		free(buf);
 		dprintf("static buffer is too small (%d)\n", n, statp);
 		*h_errnop = statp->res_h_errno;
-		return (0);
+		return (NS_UNAVAIL);
 	}
 	error = gethostanswer(buf, n, name, type, &he, hed, statp);
 	free(buf);
 	if (error != 0) {
 		*h_errnop = statp->res_h_errno;
-		return (NS_NOTFOUND);
+		switch (statp->res_h_errno) {
+		case HOST_NOT_FOUND:
+			return (NS_NOTFOUND);
+		case TRY_AGAIN:
+			return (NS_TRYAGAIN);
+		default:
+			return (NS_UNAVAIL);
+		}
+		/*NOTREACHED*/
 	}
 	if (__copy_hostent(&he, hptr, buffer, buflen) != 0) {
 		*errnop = errno;
@@ -632,7 +640,15 @@ _dns_gethostbyaddr(void *rval, void *cb_
 	if (gethostanswer(buf, n, qbuf, T_PTR, &he, hed, statp) != 0) {
 		free(buf);
 		*h_errnop = statp->res_h_errno;
-		return (NS_NOTFOUND);	/* h_errno was set by gethostanswer() */
+		switch (statp->res_h_errno) {
+		case HOST_NOT_FOUND:
+			return (NS_NOTFOUND);
+		case TRY_AGAIN:
+			return (NS_TRYAGAIN);
+		default:
+			return (NS_UNAVAIL);
+		}
+		/*NOTREACHED*/
 	}
 	free(buf);
 #ifdef SUNSECURITY