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* Ignore services in nsswitch.conf that cannot be found (like

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"mdns4_mininal" on Ubuntu).  This is a fix for NIXPKGS-79.  It
  doesn't *quite* fix the problem in all cases (there might be people
  actually using mDNS; they should just run the "nscd" daemon) but at
  least it should keep curl from failing in Nixpkgs downloads.

svn path=/nixpkgs/branches/stdenv-updates/; revision=11487
This commit is contained in:
Eelco Dolstra 2008-04-08 12:28:03 +00:00
parent 4195c1522f
commit 7d96471775
2 changed files with 50 additions and 0 deletions
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25
pkgs/development/libraries/glibc-2.7/default.nix
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@ -16,6 +16,31 @@ stdenv.mkDerivation {
inherit (stdenv) is64bit;
patches = [
/* Fix for NIXPKGS-79: when doing host name lookups, when
nsswitch.conf contains a line like
hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4
don't return an error when mdns4_minimal can't be found. This
is a bug in Glibc: when a service can't be found, NSS should
continue to the next service unless "UNAVAIL=return" is set.
("NOTFOUND=return" refers to the service returning a NOTFOUND
error, not the service itself not being found.) The reason is
that the "status" variable (while initialised to UNAVAIL) is
outside of the loop that iterates over the services, the
"files" service sets status to NOTFOUND. So when the call to
find "mdns4_minimal" fails, "status" will still be NOTFOUND,
and it will return instead of continuing to "dns". Thus, the
line
hosts: mdns4_minimal [NOTFOUND=return] dns mdns4
does work because "status" will contain UNAVAIL after the
failure to find mdns4_minimal. */
./nss-skip-unavail.patch
];
# `--with-tls --without-__thread' enables support for TLS but causes
# it not to be used. Required if we don't want to barf on 2.4
# kernels. Or something.

25
pkgs/development/libraries/glibc-2.7/nss-skip-unavail.patch Normal file
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@ -0,0 +1,25 @@
diff -rc glibc-2.7-orig/sysdeps/posix/getaddrinfo.c glibc-2.7/sysdeps/posix/getaddrinfo.c
*** glibc-2.7-orig/sysdeps/posix/getaddrinfo.c 2007-10-17 18:05:12.000000000 +0200
--- glibc-2.7/sysdeps/posix/getaddrinfo.c 2008-04-08 12:17:09.000000000 +0200
***************
*** 498,505 ****
int no_data = 0;
int no_inet6_data = 0;
service_user *nip = NULL;
- enum nss_status inet6_status = NSS_STATUS_UNAVAIL;
- enum nss_status status = NSS_STATUS_UNAVAIL;
int no_more;
int old_res_options;
--- 498,503 ----
***************
*** 689,694 ****
--- 687,694 ----
while (!no_more)
{
+ enum nss_status inet6_status = NSS_STATUS_UNAVAIL;
+ enum nss_status status = NSS_STATUS_UNAVAIL;
nss_gethostbyname3_r fct = NULL;
if (req->ai_flags & AI_CANONNAME)
/* No need to use this function if we do not look for