nss-myhostname: move NSS boilerplate to nss-util.h

3 files changed, 123 insertions, 94 deletions

diff --git a/src/nss-myhostname/nss-myhostname.c b/src/nss-myhostname/nss-myhostname.c
index 15a35f3022..06bd842fc6 100644
--- a/src/nss-myhostname/nss-myhostname.c
+++ b/src/nss-myhostname/nss-myhostname.c
@@ -32,6 +32,8 @@
 
 #include "local-addresses.h"
 #include "macro.h"
+#include "nss-util.h"
+#include "util.h"
 
 /* Ensure that glibc's assert is used. We cannot use assert from macro.h, as
  * libnss_myhostname will be linked into arbitrary programs which will, in turn
@@ -47,49 +49,8 @@
 #define LOCALADDRESS_IPV6 &in6addr_loopback
 #define LOOPBACK_INTERFACE "lo"
 
-enum nss_status _nss_myhostname_gethostbyname4_r(
-                const char *name,
-                struct gaih_addrtuple **pat,
-                char *buffer, size_t buflen,
-                int *errnop, int *h_errnop,
-                int32_t *ttlp) _public_;
-
-enum nss_status _nss_myhostname_gethostbyname3_r(
-                const char *name,
-                int af,
-                struct hostent *host,
-                char *buffer, size_t buflen,
-                int *errnop, int *h_errnop,
-                int32_t *ttlp,
-                char **canonp) _public_;
-
-enum nss_status _nss_myhostname_gethostbyname2_r(
-                const char *name,
-                int af,
-                struct hostent *host,
-                char *buffer, size_t buflen,
-                int *errnop, int *h_errnop) _public_;
-
-enum nss_status _nss_myhostname_gethostbyname_r(
-                const char *name,
-                struct hostent *host,
-                char *buffer, size_t buflen,
-                int *errnop, int *h_errnop) _public_;
-
-enum nss_status _nss_myhostname_gethostbyaddr2_r(
-                const void* addr, socklen_t len,
-                int af,
-                struct hostent *host,
-                char *buffer, size_t buflen,
-                int *errnop, int *h_errnop,
-                int32_t *ttlp) _public_;
-
-enum nss_status _nss_myhostname_gethostbyaddr_r(
-                const void* addr, socklen_t len,
-                int af,
-                struct hostent *host,
-                char *buffer, size_t buflen,
-                int *errnop, int *h_errnop) _public_;
+NSS_GETHOSTBYNAME_PROTOTYPES(myhostname);
+NSS_GETHOSTBYADDR_PROTOTYPES(myhostname);
 
 enum nss_status _nss_myhostname_gethostbyname4_r(
                 const char *name,
@@ -411,39 +372,6 @@ enum nss_status _nss_myhostname_gethostbyname3_r(
                         canonp);
 }
 
-enum nss_status _nss_myhostname_gethostbyname2_r(
-                const char *name,
-                int af,
-                struct hostent *host,
-                char *buffer, size_t buflen,
-                int *errnop, int *h_errnop) {
-
-        return _nss_myhostname_gethostbyname3_r(
-                        name,
-                        af,
-                        host,
-                        buffer, buflen,
-                        errnop, h_errnop,
-                        NULL,
-                        NULL);
-}
-
-enum nss_status _nss_myhostname_gethostbyname_r(
-                const char *name,
-                struct hostent *host,
-                char *buffer, size_t buflen,
-                int *errnop, int *h_errnop) {
-
-        return _nss_myhostname_gethostbyname3_r(
-                        name,
-                        AF_UNSPEC,
-                        host,
-                        buffer, buflen,
-                        errnop, h_errnop,
-                        NULL,
-                        NULL);
-}
-
 enum nss_status _nss_myhostname_gethostbyaddr2_r(
                 const void* addr, socklen_t len,
                 int af,
@@ -538,18 +466,5 @@ found:
 
 }
 
-enum nss_status _nss_myhostname_gethostbyaddr_r(
-                const void* addr, socklen_t len,
-                int af,
-                struct hostent *host,
-                char *buffer, size_t buflen,
-                int *errnop, int *h_errnop) {
-
-        return _nss_myhostname_gethostbyaddr2_r(
-                        addr, len,
-                        af,
-                        host,
-                        buffer, buflen,
-                        errnop, h_errnop,
-                        NULL);
-}
+NSS_GETHOSTBYNAME_FALLBACKS(myhostname);
+NSS_GETHOSTBYADDR_FALLBACKS(myhostname);
diff --git a/src/nss-myhostname/nss-myhostname.sym b/src/nss-myhostname/nss-myhostname.sym
index dcfc2e4006..78646c38b4 100644
--- a/src/nss-myhostname/nss-myhostname.sym
+++ b/src/nss-myhostname/nss-myhostname.sym
@@ -9,11 +9,11 @@
 
 {
 global:
-        _nss_myhostname_gethostbyaddr2_r;
-        _nss_myhostname_gethostbyaddr_r;
+        _nss_myhostname_gethostbyname_r;
         _nss_myhostname_gethostbyname2_r;
         _nss_myhostname_gethostbyname3_r;
         _nss_myhostname_gethostbyname4_r;
-        _nss_myhostname_gethostbyname_r;
+        _nss_myhostname_gethostbyaddr_r;
+        _nss_myhostname_gethostbyaddr2_r;
 local: *;
 };
diff --git a/src/shared/nss-util.h b/src/shared/nss-util.h
new file mode 100644
index 0000000000..2c897d8520
--- /dev/null
+++ b/src/shared/nss-util.h
@@ -0,0 +1,114 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <nss.h>
+#include <netdb.h>
+
+#define NSS_GETHOSTBYNAME_PROTOTYPES(module)            \
+enum nss_status _nss_##module##_gethostbyname4_r(       \
+                const char *name,                       \
+                struct gaih_addrtuple **pat,            \
+                char *buffer, size_t buflen,            \
+                int *errnop, int *h_errnop,             \
+                int32_t *ttlp) _public_;                \
+enum nss_status _nss_##module##_gethostbyname3_r(       \
+                const char *name,                       \
+                int af,                                 \
+                struct hostent *host,                   \
+                char *buffer, size_t buflen,            \
+                int *errnop, int *h_errnop,             \
+                int32_t *ttlp,                          \
+                char **canonp) _public_;                \
+enum nss_status _nss_##module##_gethostbyname2_r(       \
+                const char *name,                       \
+                int af,                                 \
+                struct hostent *host,                   \
+                char *buffer, size_t buflen,            \
+                int *errnop, int *h_errnop) _public_;   \
+enum nss_status _nss_##module##_gethostbyname_r(        \
+                const char *name,                       \
+                struct hostent *host,                   \
+                char *buffer, size_t buflen,            \
+                int *errnop, int *h_errnop) _public_
+
+#define NSS_GETHOSTBYADDR_PROTOTYPES(module)            \
+enum nss_status _nss_##module##_gethostbyaddr2_r(       \
+                const void* addr, socklen_t len,        \
+                int af,                                 \
+                struct hostent *host,                   \
+                char *buffer, size_t buflen,            \
+                int *errnop, int *h_errnop,             \
+                int32_t *ttlp) _public_;                \
+enum nss_status _nss_##module##_gethostbyaddr_r(        \
+                const void* addr, socklen_t len,        \
+                int af,                                 \
+                struct hostent *host,                   \
+                char *buffer, size_t buflen,            \
+                int *errnop, int *h_errnop) _public_
+
+#define NSS_GETHOSTBYNAME_FALLBACKS(module)             \
+enum nss_status _nss_##module##_gethostbyname2_r(       \
+                const char *name,                       \
+                int af,                                 \
+                struct hostent *host,                   \
+                char *buffer, size_t buflen,            \
+                int *errnop, int *h_errnop) {           \
+        return _nss_##module##_gethostbyname3_r(        \
+                        name,                           \
+                        af,                             \
+                        host,                           \
+                        buffer, buflen,                 \
+                        errnop, h_errnop,               \
+                        NULL,                           \
+                        NULL);                          \
+}                                                       \
+enum nss_status _nss_##module##_gethostbyname_r(        \
+                const char *name,                       \
+                struct hostent *host,                   \
+                char *buffer, size_t buflen,            \
+                int *errnop, int *h_errnop) {           \
+        return _nss_##module##_gethostbyname3_r(        \
+                        name,                           \
+                        AF_UNSPEC,                      \
+                        host,                           \
+                        buffer, buflen,                 \
+                        errnop, h_errnop,               \
+                        NULL,                           \
+                        NULL);                          \
+}
+
+#define NSS_GETHOSTBYADDR_FALLBACKS(module)             \
+enum nss_status _nss_##module##_gethostbyaddr_r(        \
+                const void* addr, socklen_t len,        \
+                int af,                                 \
+                struct hostent *host,                   \
+                char *buffer, size_t buflen,            \
+                int *errnop, int *h_errnop) {           \
+        return _nss_##module##_gethostbyaddr2_r(        \
+                        addr, len,                      \
+                        af,                             \
+                        host,                           \
+                        buffer, buflen,                 \
+                        errnop, h_errnop,               \
+                        NULL);                          \
+}