A patch for libresolv

[hjl@valinux.com (H.J. Lu)]

Hi,

There are many options in libresolve. However, there are no codes to
set them. Here is a patch to handle options for libresolve.


-- 
H.J. Lu (hjl@gnu.org)
--
Tue Oct  5 18:23:01 1999  H.J. Lu  <hjl@gnu.org>

	* resolv/res_init.c (o_mnemonic): New.
	(res_setoptions): Use it.

Index: resolv/res_init.c
===================================================================
RCS file: /work/cvs/gnu/glibc-2.1/resolv/res_init.c,v
retrieving revision 1.1.1.9
diff -u -p -r1.1.1.9 res_init.c
--- resolv/res_init.c	1999/05/05 01:35:31	1.1.1.9
+++ resolv/res_init.c	1999/10/06 01:21:05
@@ -111,6 +111,7 @@ static int netinfo_res_init __P((int *ha
 #endif
 
 static void res_setoptions __P((char *, char *)) internal_function;
+static u_long o_mnemonic __P((const char * mnemonic)) internal_function;
 
 #ifdef RESOLVSORT
 static const char sort_mask[] = "/&";
@@ -427,12 +428,66 @@ res_init()
 	return (0);
 }
 
+/*
+ * Return an option from a mnemonic.
+ */
+static u_long
+internal_function
+o_mnemonic (mnemonic)
+	const char * mnemonic;
+{
+	if (strncasecmp (mnemonic, "init", sizeof ("init") - 1) == 0)
+		return RES_INIT;
+	else if (strncasecmp (mnemonic, "debug",
+			      sizeof ("debug") - 1) == 0)
+		return RES_DEBUG;
+	else if (strncasecmp (mnemonic, "aaonly",
+			      sizeof ("aaonly") - 1) == 0)
+		return RES_AAONLY;
+	else if (strncasecmp (mnemonic, "usevc",
+			      sizeof ("usevc") - 1) == 0)
+		return RES_USEVC;
+	else if (strncasecmp (mnemonic, "primry",
+			      sizeof ("primry") - 1) == 0)
+		return RES_PRIMARY;
+	else if (strncasecmp (mnemonic, "igntc",
+			      sizeof ("igntc") - 1) == 0)
+		return RES_IGNTC;
+	else if (strncasecmp (mnemonic, "recurs",
+			      sizeof ("recurs") - 1) == 0)
+		return RES_RECURSE;
+	else if (strncasecmp (mnemonic, "defnam",
+			      sizeof ("defnam") - 1) == 0)
+		return RES_DEFNAMES;
+	else if (strncasecmp (mnemonic, "styopn",
+			      sizeof ("styopn") - 1) == 0)
+		return RES_STAYOPEN;
+	else if (strncasecmp (mnemonic, "dnsrch",
+			      sizeof ("dnsrch") - 1) == 0)
+		return RES_DNSRCH;
+	else if (strncasecmp (mnemonic, "insecure1",
+			      sizeof ("insecure1") - 1) == 0)
+		return RES_INSECURE1;
+	else if (strncasecmp (mnemonic, "insecure2",
+			      sizeof ("insecure2") - 1) == 0)
+		return RES_INSECURE2;
+	else if (strncasecmp (mnemonic, "noaliases",
+			      sizeof ("noaliases") - 1) == 0)
+		return RES_NOALIASES;
+	else if (strncasecmp (mnemonic, "inet6",
+			      sizeof ("inet6") - 1) == 0)
+		return RES_USE_INET6;
+	else
+		return ~0;
+}
+
 static void
 internal_function
 res_setoptions(options, source)
 	char *options, *source;
 {
 	char *cp = options;
+	u_long option;
 	int i;
 
 #ifdef DEBUG
@@ -464,8 +519,8 @@ res_setoptions(options, source)
 			}
 			printf(";;\tdebug\n");
 #endif
-		} else if (!strncmp(cp, "inet6", sizeof("inet6") - 1)) {
-			_res.options |= RES_USE_INET6;
+		} else if ((option = o_mnemonic (cp)) != ~0) {
+			_res.options |= option;
 		} else {
 			/* XXX - print a warning here? */
 		}