nss/tst-nss-files-hosts-erange.c

   1 /* Parse /etc/hosts in multi mode with a trailing long line (bug 21915).
   2    Copyright (C) 2017-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19
  20 #include <dlfcn.h>
  21 #include <errno.h>
  22 #include <gnu/lib-names.h>
  23 #include <netdb.h>
  24 #include <nss.h>
  25 #include <support/check.h>
  26 #include <support/check_nss.h>
  27 #include <support/namespace.h>
  28 #include <support/test-driver.h>
  29 #include <support/xunistd.h>
  30
  31 struct support_chroot *chroot_env;
  32
  33 #define X10 "XXXXXXXXXX"
  34 #define X100 X10 X10 X10 X10 X10 X10 X10 X10 X10 X10
  35 #define X1000 X100 X100 X100 X100 X100 X100 X100 X100 X100 X100
  36
  37 static void
  38 prepare (int argc, char **argv)
  39 {
  40   chroot_env = support_chroot_create
  41     ((struct support_chroot_configuration)
  42      {
  43        .resolv_conf = "",
  44        .hosts =
  45          "127.0.0.1   localhost localhost.localdomain\n"
  46          "::1         localhost localhost.localdomain\n"
  47          "192.0.2.1   example.com\n"
  48          "#" X1000 X100 "\n",
  49        .host_conf = "multi on\n",
  50      });
  51 }
  52
  53 static int
  54 do_test (void)
  55 {
  56   support_become_root ();
  57   if (!support_can_chroot ())
  58     return EXIT_UNSUPPORTED;
  59
  60   __nss_configure_lookup ("hosts", "files");
  61   if (dlopen (LIBNSS_FILES_SO, RTLD_LAZY) == NULL)
  62     FAIL_EXIT1 ("could not load " LIBNSS_DNS_SO ": %s", dlerror ());
  63
  64   xchroot (chroot_env->path_chroot);
  65
  66   errno = ERANGE;
  67   h_errno = NETDB_INTERNAL;
  68   check_hostent ("gethostbyname example.com",
  69                  gethostbyname ("example.com"),
  70                  "name: example.com\n"
  71                  "address: 192.0.2.1\n");
  72   errno = ERANGE;
  73   h_errno = NETDB_INTERNAL;
  74   check_hostent ("gethostbyname2 AF_INET example.com",
  75                  gethostbyname2 ("example.com", AF_INET),
  76                  "name: example.com\n"
  77                  "address: 192.0.2.1\n");
  78   {
  79     struct addrinfo hints =
  80       {
  81         .ai_family = AF_UNSPEC,
  82         .ai_socktype = SOCK_STREAM,
  83         .ai_protocol = IPPROTO_TCP,
  84       };
  85     errno = ERANGE;
  86     h_errno = NETDB_INTERNAL;
  87     struct addrinfo *ai;
  88     int ret = getaddrinfo ("example.com", "80", &hints, &ai);
  89     check_addrinfo ("example.com AF_UNSPEC", ai, ret,
  90                     "address: STREAM/TCP 192.0.2.1 80\n");
  91     if (ret == 0)
  92       freeaddrinfo (ai);
  93
  94     hints.ai_family = AF_INET;
  95     errno = ERANGE;
  96     h_errno = NETDB_INTERNAL;
  97     ret = getaddrinfo ("example.com", "80", &hints, &ai);
  98     check_addrinfo ("example.com AF_INET", ai, ret,
  99                     "address: STREAM/TCP 192.0.2.1 80\n");
 100     if (ret == 0)
 101       freeaddrinfo (ai);
 102   }
 103
 104   support_chroot_free (chroot_env);
 105   return 0;
 106 }
 107
 108 #define PREPARE prepare
 109 #include <support/test-driver.c>