Date: Fri, 25 Aug 2006 15:08:13 -0700 From: Julian Elischer <julian@elischer.org> To: Julian Elischer <julian@elischer.org> Cc: FreeBSD Net <net@freebsd.org> Subject: Re: possible patch for implementing split DNS Message-ID: <44EF74CD.6080500@elischer.org> In-Reply-To: <44EF6E18.6090905@elischer.org> References: <44EF6E18.6090905@elischer.org>
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Julian Elischer wrote:
> I need some processes to look elsewhere for DNS information from where
> the rest
> of the system looks.. This patch seems to me a simple solution.
> We over-ride where the resolver looks for resolv.conf using an
> environment variable.
> This would allow me to reset this to an application specific config
> file that
> specifies a different server.
>
> Anyone got better ways fo doing this?
oops
patch had a bug..
here's the fixed version (permission checks were screwed up)
%diff -u ./lib/libc/net/res_init.c /tmp/res_init.c
--- ./lib/libc/net/res_init.c Thu Sep 9 10:42:18 2004
+++ /tmp/res_init.c Fri Aug 25 15:05:59 2006
@@ -154,6 +154,7 @@
int nserv = 0; /* number of nameserver records read from file */
int haveenv = 0;
int havesearch = 0;
+ char *conf_path;
#ifdef RESOLVSORT
int nsort = 0;
char *net;
@@ -262,7 +263,10 @@
(line[sizeof(name) - 1] == ' ' || \
line[sizeof(name) - 1] == '\t'))
- if ((fp = fopen(_PATH_RESCONF, "r")) != NULL) {
+ if (issetugid() != 0 || (res_path = getenv("RESOLV_CONF")) == NULL)
+ res_path = _PATH_RESCONF;
+
+ if ((fp = fopen(res_path, "r")) != NULL) {
/* read the config file */
while (fgets(buf, sizeof(buf), fp) != NULL) {
/* skip comments */
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