1  /* Test large input for sgetsgent (bug 30151).
       2     Copyright (C) 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  #include <gshadow.h>
      20  #include <stddef.h>
      21  #include <support/check.h>
      22  #include <support/support.h>
      23  #include <support/xmemstream.h>
      24  #include <stdlib.h>
      25  
      26  static int
      27  do_test (void)
      28  {
      29    /* Create a shadow group with 1000 members.  */
      30    struct xmemstream mem;
      31    xopen_memstream (&mem);
      32    const char *passwd = "k+zD0nucwfxAo3sw1NXUj6K5vt5M16+X0TVGdE1uFvq5R8V7efJ";
      33    fprintf (mem.out, "group-name:%s::m0", passwd);
      34    for (int i = 1; i < 1000; ++i)
      35      fprintf (mem.out, ",m%d", i);
      36    xfclose_memstream (&mem);
      37  
      38    /* Call sgetsgent.  */
      39    char *input = mem.buffer;
      40    struct sgrp *e = sgetsgent (input);
      41    TEST_VERIFY_EXIT (e != NULL);
      42    TEST_COMPARE_STRING (e->sg_namp, "group-name");
      43    TEST_COMPARE_STRING (e->sg_passwd, passwd);
      44    /* No administrators.  */
      45    TEST_COMPARE_STRING (e->sg_adm[0], NULL);
      46    /* Check the members list.  */
      47    for (int i = 0; i < 1000; ++i)
      48      {
      49        char *member = xasprintf ("m%d", i);
      50        TEST_COMPARE_STRING (e->sg_mem[i], member);
      51        free (member);
      52      }
      53    TEST_COMPARE_STRING (e->sg_mem[1000], NULL);
      54  
      55    /* Check that putsgent brings back the input string.  */
      56    xopen_memstream (&mem);
      57    TEST_COMPARE (putsgent (e, mem.out), 0);
      58    xfclose_memstream (&mem);
      59    /* Compare without the trailing '\n' that putsgent added.  */
      60    TEST_COMPARE (mem.buffer[mem.length - 1], '\n');
      61    mem.buffer[mem.length - 1] = '\0';
      62    TEST_COMPARE_STRING (mem.buffer, input);
      63  
      64    free (mem.buffer);
      65    free (input);
      66    return 0;
      67  }
      68  
      69  #include <support/test-driver.c>