src/basic/nss-util.h

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 #pragma once
   4
   5 /***
   6   This file is part of systemd.
   7
   8   Copyright 2014 Lennart Poettering
   9
  10   systemd is free software; you can redistribute it and/or modify it
  11   under the terms of the GNU Lesser General Public License as published by
  12   the Free Software Foundation; either version 2.1 of the License, or
  13   (at your option) any later version.
  14
  15   systemd is distributed in the hope that it will be useful, but
  16   WITHOUT ANY WARRANTY; without even the implied warranty of
  17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18   Lesser General Public License for more details.
  19
  20   You should have received a copy of the GNU Lesser General Public License
  21   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  22 ***/
  23
  24 #include <grp.h>
  25 #include <netdb.h>
  26 #include <nss.h>
  27 #include <pwd.h>
  28 #include <resolv.h>
  29
  30 #define NSS_SIGNALS_BLOCK SIGALRM,SIGVTALRM,SIGPIPE,SIGCHLD,SIGTSTP,SIGIO,SIGHUP,SIGUSR1,SIGUSR2,SIGPROF,SIGURG,SIGWINCH
  31
  32 #define NSS_GETHOSTBYNAME_PROTOTYPES(module)            \
  33 enum nss_status _nss_##module##_gethostbyname4_r(       \
  34                 const char *name,                       \
  35                 struct gaih_addrtuple **pat,            \
  36                 char *buffer, size_t buflen,            \
  37                 int *errnop, int *h_errnop,             \
  38                 int32_t *ttlp) _public_;                \
  39 enum nss_status _nss_##module##_gethostbyname3_r(       \
  40                 const char *name,                       \
  41                 int af,                                 \
  42                 struct hostent *host,                   \
  43                 char *buffer, size_t buflen,            \
  44                 int *errnop, int *h_errnop,             \
  45                 int32_t *ttlp,                          \
  46                 char **canonp) _public_;                \
  47 enum nss_status _nss_##module##_gethostbyname2_r(       \
  48                 const char *name,                       \
  49                 int af,                                 \
  50                 struct hostent *host,                   \
  51                 char *buffer, size_t buflen,            \
  52                 int *errnop, int *h_errnop) _public_;   \
  53 enum nss_status _nss_##module##_gethostbyname_r(        \
  54                 const char *name,                       \
  55                 struct hostent *host,                   \
  56                 char *buffer, size_t buflen,            \
  57                 int *errnop, int *h_errnop) _public_
  58
  59 #define NSS_GETHOSTBYADDR_PROTOTYPES(module)            \
  60 enum nss_status _nss_##module##_gethostbyaddr2_r(       \
  61                 const void* addr, socklen_t len,        \
  62                 int af,                                 \
  63                 struct hostent *host,                   \
  64                 char *buffer, size_t buflen,            \
  65                 int *errnop, int *h_errnop,             \
  66                 int32_t *ttlp) _public_;                \
  67 enum nss_status _nss_##module##_gethostbyaddr_r(        \
  68                 const void* addr, socklen_t len,        \
  69                 int af,                                 \
  70                 struct hostent *host,                   \
  71                 char *buffer, size_t buflen,            \
  72                 int *errnop, int *h_errnop) _public_
  73
  74 #define NSS_GETHOSTBYNAME_FALLBACKS(module)             \
  75 enum nss_status _nss_##module##_gethostbyname2_r(       \
  76                 const char *name,                       \
  77                 int af,                                 \
  78                 struct hostent *host,                   \
  79                 char *buffer, size_t buflen,            \
  80                 int *errnop, int *h_errnop) {           \
  81         return _nss_##module##_gethostbyname3_r(        \
  82                         name,                           \
  83                         af,                             \
  84                         host,                           \
  85                         buffer, buflen,                 \
  86                         errnop, h_errnop,               \
  87                         NULL,                           \
  88                         NULL);                          \
  89 }                                                       \
  90 enum nss_status _nss_##module##_gethostbyname_r(        \
  91                 const char *name,                       \
  92                 struct hostent *host,                   \
  93                 char *buffer, size_t buflen,            \
  94                 int *errnop, int *h_errnop) {           \
  95         enum nss_status ret = NSS_STATUS_NOTFOUND;      \
  96                                                         \
  97         if (_res.options & RES_USE_INET6)               \
  98                 ret = _nss_##module##_gethostbyname3_r( \
  99                         name,                           \
 100                         AF_INET6,                       \
 101                         host,                           \
 102                         buffer, buflen,                 \
 103                         errnop, h_errnop,               \
 104                         NULL,                           \
 105                         NULL);                          \
 106         if (ret == NSS_STATUS_NOTFOUND)                 \
 107                 ret = _nss_##module##_gethostbyname3_r( \
 108                         name,                           \
 109                         AF_INET,                        \
 110                         host,                           \
 111                         buffer, buflen,                 \
 112                         errnop, h_errnop,               \
 113                         NULL,                           \
 114                         NULL);                          \
 115        return ret;                                      \
 116 }                                                       \
 117 struct __useless_struct_to_allow_trailing_semicolon__
 118
 119 #define NSS_GETHOSTBYADDR_FALLBACKS(module)             \
 120 enum nss_status _nss_##module##_gethostbyaddr_r(        \
 121                 const void* addr, socklen_t len,        \
 122                 int af,                                 \
 123                 struct hostent *host,                   \
 124                 char *buffer, size_t buflen,            \
 125                 int *errnop, int *h_errnop) {           \
 126         return _nss_##module##_gethostbyaddr2_r(        \
 127                         addr, len,                      \
 128                         af,                             \
 129                         host,                           \
 130                         buffer, buflen,                 \
 131                         errnop, h_errnop,               \
 132                         NULL);                          \
 133 }                                                       \
 134 struct __useless_struct_to_allow_trailing_semicolon__
 135
 136 #define NSS_GETPW_PROTOTYPES(module)                    \
 137 enum nss_status _nss_##module##_getpwnam_r(             \
 138                 const char *name,                       \
 139                 struct passwd *pwd,                     \
 140                 char *buffer, size_t buflen,            \
 141                 int *errnop) _public_;                  \
 142 enum nss_status _nss_mymachines_getpwuid_r(             \
 143                 uid_t uid,                              \
 144                 struct passwd *pwd,                     \
 145                 char *buffer, size_t buflen,            \
 146                 int *errnop) _public_
 147
 148 #define NSS_GETGR_PROTOTYPES(module)                    \
 149 enum nss_status _nss_##module##_getgrnam_r(             \
 150                 const char *name,                       \
 151                 struct group *gr,                       \
 152                 char *buffer, size_t buflen,            \
 153                 int *errnop) _public_;                  \
 154 enum nss_status _nss_##module##_getgrgid_r(             \
 155                 gid_t gid,                              \
 156                 struct group *gr,                       \
 157                 char *buffer, size_t buflen,            \
 158                 int *errnop) _public_