nss/tst-nss-getpwent.c

   1 /* Copyright (C) 2015-2023 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <nss.h>
  19 #include <pwd.h>
  20 #include <stdbool.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include <support/support.h>
  26
  27 int
  28 do_test (void)
  29 {
  30   __nss_configure_lookup ("passwd", "files");
  31
  32   /* Count the number of entries in the password database, and fetch
  33      data from the first and last entries.  */
  34   size_t count = 0;
  35   struct passwd * pw;
  36   char *first_name = NULL;
  37   uid_t first_uid = 0;
  38   char *last_name = NULL;
  39   uid_t last_uid = 0;
  40   setpwent ();
  41   while ((pw  = getpwent ()) != NULL)
  42     {
  43       if (first_name == NULL)
  44         {
  45           first_name = xstrdup (pw->pw_name);
  46           first_uid = pw->pw_uid;
  47         }
  48
  49       free (last_name);
  50       last_name = xstrdup (pw->pw_name);
  51       last_uid = pw->pw_uid;
  52       ++count;
  53     }
  54   endpwent ();
  55
  56   if (count == 0)
  57     {
  58       printf ("No entries in the password database.\n");
  59       return 0;
  60     }
  61
  62   /* Try again, this time interleaving with name-based and UID-based
  63      lookup operations.  The counts do not match if the interleaved
  64      lookups affected the enumeration.  */
  65   size_t new_count = 0;
  66   setpwent ();
  67   while ((pw  = getpwent ()) != NULL)
  68     {
  69       if (new_count == count)
  70         {
  71           printf ("Additional entry in the password database.\n");
  72           return 1;
  73         }
  74       ++new_count;
  75       struct passwd *pw2 = getpwnam (first_name);
  76       if (pw2 == NULL)
  77         {
  78           printf ("getpwnam (%s) failed: %m\n", first_name);
  79           return 1;
  80         }
  81       pw2 = getpwnam (last_name);
  82       if (pw2 == NULL)
  83         {
  84           printf ("getpwnam (%s) failed: %m\n", last_name);
  85           return 1;
  86         }
  87       pw2 = getpwuid (first_uid);
  88       if (pw2 == NULL)
  89         {
  90           printf ("getpwuid (%llu) failed: %m\n",
  91                   (unsigned long long) first_uid);
  92           return 1;
  93         }
  94       pw2 = getpwuid (last_uid);
  95       if (pw2 == NULL)
  96         {
  97           printf ("getpwuid (%llu) failed: %m\n",
  98                   (unsigned long long) last_uid);
  99           return 1;
 100         }
 101     }
 102   endpwent ();
 103   if (new_count < count)
 104     {
 105       printf ("Missing entry in the password database.\n");
 106       return 1;
 107     }
 108
 109   return 0;
 110 }
 111
 112 #define TIMEOUT 300
 113 #include <support/test-driver.c>