10851 2009-10-26 17:38:00 +0000 no fallback to nameserver 0.0.0.0 if /etc/resolv.conf is missing 2010-09-14 17:04:19 +0000 1 1 1 Unclassified glibc libc unspecified All All RESOLVED FIXED P2 normal --- 1 aurelien drepper.fsp glibc-bugs x86_64-unknown-linux-gnu x86_64-unknown-linux-gnu x86_64-unknown-linux-gnu oldest_to_newest 39206 0 aurelien 2009-10-26 17:38:25 +0000 Starting with glibc 2.10, there is no fallback to nameserver 0.0.0.0 anymore if /etc/resolv.conf is missing. This is due to this change: 2008-12-02 Ulrich Drepper <drepper@redhat.com> * resolv/res_init.c (__res_vinit): Initialize nscount to zero. This value should be set back to 1 so that the following code is actually useful: #ifdef USELOOPBACK statp->nsaddr.sin_addr = inet_makeaddr(IN_LOOPBACKNET, 1); #else statp->nsaddr.sin_addr.s_addr = INADDR_ANY; #endif statp->nsaddr.sin_family = AF_INET; statp->nsaddr.sin_port = htons(NAMESERVER_PORT); 39207 1 4322 aurelien 2009-10-26 17:38:48 +0000 Created attachment 4322 Patch to fix the problem 39635 2 4369 aurelien 2009-11-08 18:41:44 +0000 Created attachment 4369 New patch The previous patch does not work in case /etc/resolv.conf exists, but does not contain a nameserver entry. This new patch also takes that into account. 39665 3 pasky 2009-11-09 16:38:06 +0000 See also http://sourceware.org/ml/libc-alpha/2009-02/msg00028.html :( 39954 4 4402 pasky 2009-11-20 08:28:19 +0000 Created attachment 4402 alternative patch Oops, I haven't noticed you already implemented a fix; anyway, here's what I've done independently, somewhat simpler patch. YMMV. 44750 5 drepper.fsp 2010-08-25 14:48:07 +0000 I checked in a different patch. 44876 6 aurelien 2010-09-02 17:55:04 +0000 (In reply to comment #5) > I checked in a different patch. ... but broken what. You forget to set statp->nscount to 1, so it doesn't work. 45069 7 pasky 2010-09-14 17:04:19 +0000 Fixed in Git now for good, hopefully. 4322 2009-10-26 17:38:00 +0000 2009-11-08 18:41:44 +0000 Patch to fix the problem missing-etc-resolv.conf.diff text/plain 433 aurelien MjAwOS0xMC0yNiAgQXVyZWxpZW4gSmFybm8gIDxhdXJlbGllbkBhdXJlbDMyLm5ldD4KCgkqIHJl c29sdi9yZXNfaW5pdC5jIChfX3Jlc192aW5pdCk6IEluaXRpYWxpemUgbnNjb3VudCB0byBvbmUu CgotLS0gYS9yZXNvbHYvcmVzX2luaXQuYworKysgYi9yZXNvbHYvcmVzX2luaXQuYwpAQCAtMTgz LDcgKzE4Myw3IEBAIF9fcmVzX3Zpbml0KHJlc19zdGF0ZSBzdGF0cCwgaW50IHByZWluaXQpIHsK ICNlbmRpZgogCXN0YXRwLT5uc2FkZHIuc2luX2ZhbWlseSA9IEFGX0lORVQ7CiAJc3RhdHAtPm5z YWRkci5zaW5fcG9ydCA9IGh0b25zKE5BTUVTRVJWRVJfUE9SVCk7Ci0Jc3RhdHAtPm5zY291bnQg PSAwOworCXN0YXRwLT5uc2NvdW50ID0gMTsKIAlzdGF0cC0+bmRvdHMgPSAxOwogCXN0YXRwLT5w ZmNvZGUgPSAwOwogCXN0YXRwLT5fdmNzb2NrID0gLTE7Cg== 4369 2009-11-08 18:41:00 +0000 2009-11-08 18:41:44 +0000 New patch etc-resolv.conf.diff text/plain 1142 aurelien MjAwOS0xMS0wOCAgQXVyZWxpZW4gSmFybm8gIDxhdXJlbGllbkBhdXJlbDMyLm5ldD4KCgkqIHJl c29sdi9yZXNfaW5pdC5jIChfX3Jlc192aW5pdCk6IEluaXRpYWxpemUgbmFtZXNlcnZlciB0byB0 aGUKCWxvb3BiYWNrIGFkZHJlc3MgaWYgbm9uZSBzcGVjaWZpZWQuCgotLS0gYS9yZXNvbHYvcmVz X2luaXQuYworKysgYi9yZXNvbHYvcmVzX2luaXQuYwpAQCAtMTc2LDEzICsxNzYsNiBAQCBfX3Jl c192aW5pdChyZXNfc3RhdGUgc3RhdHAsIGludCBwcmVpbml0KSB7CiAJCXN0YXRwLT5pZCA9IHJl c19yYW5kb21pZCgpOwogCX0KIAotI2lmZGVmIFVTRUxPT1BCQUNLCi0Jc3RhdHAtPm5zYWRkci5z aW5fYWRkciA9IGluZXRfbWFrZWFkZHIoSU5fTE9PUEJBQ0tORVQsIDEpOwotI2Vsc2UKLQlzdGF0 cC0+bnNhZGRyLnNpbl9hZGRyLnNfYWRkciA9IElOQUREUl9BTlk7Ci0jZW5kaWYKLQlzdGF0cC0+ bnNhZGRyLnNpbl9mYW1pbHkgPSBBRl9JTkVUOwotCXN0YXRwLT5uc2FkZHIuc2luX3BvcnQgPSBo dG9ucyhOQU1FU0VSVkVSX1BPUlQpOwogCXN0YXRwLT5uc2NvdW50ID0gMDsKIAlzdGF0cC0+bmRv dHMgPSAxOwogCXN0YXRwLT5wZmNvZGUgPSAwOwpAQCAtNDMzLDYgKzQyNiwxNiBAQCBfX3Jlc192 aW5pdChyZXNfc3RhdGUgc3RhdHAsIGludCBwcmVpbml0KSB7CiAjZW5kaWYKIAkgICAgKHZvaWQp IGZjbG9zZShmcCk7CiAJfQorCWlmIChzdGF0cC0+bnNjb3VudCA9PSAwKSB7CisJICAgIHN0YXRw LT5uc2NvdW50ID0gMTsKKyNpZmRlZiBVU0VMT09QQkFDSworCSAgICBzdGF0cC0+bnNhZGRyLnNp bl9hZGRyID0gaW5ldF9tYWtlYWRkcihJTl9MT09QQkFDS05FVCwgMSk7CisjZWxzZQorCSAgICBz dGF0cC0+bnNhZGRyLnNpbl9hZGRyLnNfYWRkciA9IElOQUREUl9BTlk7CisjZW5kaWYKKwkgICAg c3RhdHAtPm5zYWRkci5zaW5fZmFtaWx5ID0gQUZfSU5FVDsKKwkgICAgc3RhdHAtPm5zYWRkci5z aW5fcG9ydCA9IGh0b25zKE5BTUVTRVJWRVJfUE9SVCk7CisJfQogCWlmIChzdGF0cC0+ZGVmZG5h bWVbMF0gPT0gMCAmJgogCSAgICBfX2dldGhvc3RuYW1lKGJ1Ziwgc2l6ZW9mKHN0YXRwLT5kZWZk bmFtZSkgLSAxKSA9PSAwICYmCiAJICAgIChjcCA9IHN0cmNocihidWYsICcuJykpICE9IE5VTEwp Cgo= 4402 2009-11-20 08:28:00 +0000 2009-11-20 08:28:19 +0000 alternative patch glibc-nameserver-localhost.diff text/plain 860 pasky MjAwOS0xMS0yMCAgUGV0ciBCYXVkaXMgPHBhc2t5QHN1c2UuY3o+CgoJW0JaICMxMDg1MV0KCSog cmVzb2x2L3Jlc19pbml0LmMgKF9fcmVzX3Zpbml0KTogSW5pdGlhbGl6ZSBuc2NvdW50IGFnYWlu IHRvCglvbmUgc28gdGhhdCB0aGUgZGVmYXVsdCBsb2NhbGhvc3QgbmFtZXNlcnZlciByZWNvcmQg aXMgdXNlZC4KCmRpZmYgLS1naXQgYS9yZXNvbHYvcmVzX2luaXQuYyBiL3Jlc29sdi9yZXNfaW5p dC5jCmluZGV4IDQwZGJlN2QuLjk5ZWY4Y2YgMTAwNjQ0Ci0tLSBhL3Jlc29sdi9yZXNfaW5pdC5j CisrKyBiL3Jlc29sdi9yZXNfaW5pdC5jCkBAIC0xODMsNyArMTgzLDcgQEAgX19yZXNfdmluaXQo cmVzX3N0YXRlIHN0YXRwLCBpbnQgcHJlaW5pdCkgewogI2VuZGlmCiAJc3RhdHAtPm5zYWRkci5z aW5fZmFtaWx5ID0gQUZfSU5FVDsKIAlzdGF0cC0+bnNhZGRyLnNpbl9wb3J0ID0gaHRvbnMoTkFN RVNFUlZFUl9QT1JUKTsKLQlzdGF0cC0+bnNjb3VudCA9IDA7CisJc3RhdHAtPm5zY291bnQgPSAx OwogCXN0YXRwLT5uZG90cyA9IDE7CiAJc3RhdHAtPnBmY29kZSA9IDA7CiAJc3RhdHAtPl92Y3Nv Y2sgPSAtMTsKQEAgLTQyMCw3ICs0MjAsOCBAQCBfX3Jlc192aW5pdChyZXNfc3RhdGUgc3RhdHAs IGludCBwcmVpbml0KSB7CiAJCSAgICBjb250aW51ZTsKIAkJfQogCSAgICB9Ci0JICAgIHN0YXRw LT5uc2NvdW50ID0gbnNlcnZhbGw7CisJICAgIGlmIChuc2VydmFsbCA+IDApCisJICAgICAgc3Rh dHAtPm5zY291bnQgPSBuc2VydmFsbDsKICNpZmRlZiBfTElCQwogCSAgICBpZiAobnNlcnZhbGwg LSBuc2VydiA+IDApIHsKIAkJc3RhdHAtPl91Ll9leHQubnNjb3VudDYgPSBuc2VydmFsbCAtIG5z ZXJ2Owo=