diff options
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | resolv/res_query.c | 17 |
2 files changed, 20 insertions, 3 deletions
@@ -1,6 +1,12 @@ 2014-11-21 Alexandre Oliva <aoliva@redhat.com> [BZ #16469] + * resolv/res_query.c (__libc_res_nsearch): Skip leading dot in + search domain names. + +2014-11-21 Alexandre Oliva <aoliva@redhat.com> + + [BZ #16469] * NEWS: Update. * resolv/res_query.c (__libc_res_nquerydomain): Retain trailing dot. diff --git a/resolv/res_query.c b/resolv/res_query.c index 33eeeb70da..4a9b3b3f27 100644 --- a/resolv/res_query.c +++ b/resolv/res_query.c @@ -413,13 +413,24 @@ __libc_res_nsearch(res_state statp, for (domain = (const char * const *)statp->dnsrch; *domain && !done; domain++) { + const char *dname = domain[0]; searched = 1; - if (domain[0][0] == '\0' || - (domain[0][0] == '.' && domain[0][1] == '\0')) + /* __libc_res_nquerydoman concatenates name + with dname with a "." in between. If we + pass it in dname the "." we got from the + configured default search path, we'll end + up with "name..", which won't resolve. + OTOH, passing it "" will result in "name.", + which has the intended effect for both + possible representations of the root + domain. */ + if (dname[0] == '.') + dname++; + if (dname[0] == '\0') root_on_list++; - ret = __libc_res_nquerydomain(statp, name, *domain, + ret = __libc_res_nquerydomain(statp, name, dname, class, type, answer, anslen, answerp, answerp2, nanswerp2, |