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libmilter: fix build w/glibc-2.30

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Using RES_USE_INET6 is deprecated and has been removed by glibc 2.30[1].
Instead, there's now a function `gethostbyname2(3)` which takes the
address family as second argument to force IPv6 resolution[2].

[1] https://sourceware.org/ml/libc-alpha/2019-08/msg00029.html
[2] https://linux.die.net/man/3/gethostbyname2
This commit is contained in:
Maximilian Bosch 2020-02-01 14:53:46 +01:00
parent 056dc16463
commit 3be119d5ba
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GPG Key ID: 091DBF4D1FC46B8E
2 changed files with 45 additions and 1 deletions
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2
pkgs/development/libraries/libmilter/default.nix
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@ -31,7 +31,7 @@ stdenv.mkDerivation rec {
sh Build -f ./a.m4
'';
patches = [ ./install.patch ./sharedlib.patch ];
patches = [ ./install.patch ./sharedlib.patch ./glibc-2.30.patch ];
nativeBuildInputs = [ m4 ];

44
pkgs/development/libraries/libmilter/glibc-2.30.patch Normal file
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@ -0,0 +1,44 @@
diff --git a/libmilter/sm_gethost.c b/libmilter/sm_gethost.c
index 2423c34..f00468c 100644
--- a/libmilter/sm_gethost.c
+++ b/libmilter/sm_gethost.c
@@ -52,16 +52,8 @@ sm_getipnodebyname(name, family, flags, err)
bool resv6 = true;
struct hostent *h;
- if (family == AF_INET6)
- {
- /* From RFC2133, section 6.1 */
- resv6 = bitset(RES_USE_INET6, _res.options);
- _res.options |= RES_USE_INET6;
- }
SM_SET_H_ERRNO(0);
- h = gethostbyname(name);
- if (family == AF_INET6 && !resv6)
- _res.options &= ~RES_USE_INET6;
+ h = gethostbyname2(name, family);
/* the function is supposed to return only the requested family */
if (h != NULL && h->h_addrtype != family)
diff --git a/sendmail/conf.c b/sendmail/conf.c
index c73334e..500dafb 100644
--- a/sendmail/conf.c
+++ b/sendmail/conf.c
@@ -4243,16 +4243,8 @@ sm_getipnodebyname(name, family, flags, err)
# else /* HAS_GETHOSTBYNAME2 */
bool resv6 = true;
- if (family == AF_INET6)
- {
- /* From RFC2133, section 6.1 */
- resv6 = bitset(RES_USE_INET6, _res.options);
- _res.options |= RES_USE_INET6;
- }
SM_SET_H_ERRNO(0);
- h = gethostbyname(name);
- if (!resv6)
- _res.options &= ~RES_USE_INET6;
+ h = gethostbyname2(name, family);
/* the function is supposed to return only the requested family */
if (h != NULL && h->h_addrtype != family)