1  /* Copyright (c) 1997-2023 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 <assert.h>
      19  #include <string.h>
      20  #include <rpcsvc/nis.h>
      21  #include <shlib-compat.h>
      22  
      23  nis_error
      24  nis_addmember (const_nis_name member, const_nis_name group)
      25  {
      26    if (group != NULL && group[0] != '\0')
      27      {
      28        size_t grouplen = strlen (group);
      29        char buf[grouplen + 14 + NIS_MAXNAMELEN];
      30        char domainbuf[grouplen + 2];
      31        nis_result *res, *res2;
      32        nis_error status;
      33        char *cp, *cp2;
      34  
      35        cp = strchr (nis_leaf_of_r (group, buf, sizeof (buf) - 1), '\0');
      36        cp = stpcpy (cp, ".groups_dir");
      37        cp2 = nis_domain_of_r (group, domainbuf, sizeof (domainbuf) - 1);
      38        if (cp2 != NULL && cp2[0] != '\0')
      39          {
      40  	  *cp++ = '.';
      41            stpcpy (cp, cp2);
      42          }
      43        res = nis_lookup (buf, FOLLOW_LINKS | EXPAND_NAME);
      44        if (NIS_RES_STATUS (res) != NIS_SUCCESS)
      45  	{
      46  	  status = NIS_RES_STATUS (res);
      47  	  nis_freeresult (res);
      48  	  return status;
      49  	}
      50        if (NIS_RES_NUMOBJ (res) != 1
      51  	  || __type_of (NIS_RES_OBJECT (res)) != NIS_GROUP_OBJ)
      52  	{
      53  	  nis_freeresult (res);
      54  	  return NIS_INVALIDOBJ;
      55  	}
      56  
      57        u_int gr_members_len
      58  	= NIS_RES_OBJECT(res)->GR_data.gr_members.gr_members_len;
      59  
      60        nis_name *new_gr_members_val
      61  	= realloc (NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_val,
      62  		   (gr_members_len + 1) * sizeof (nis_name));
      63        if (new_gr_members_val == NULL)
      64  	goto nomem_out;
      65  
      66        NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_val
      67  	= new_gr_members_val;
      68  
      69        new_gr_members_val[gr_members_len] = strdup (member);
      70        if (new_gr_members_val[gr_members_len] == NULL)
      71  	{
      72  	nomem_out:
      73  	  nis_freeresult (res);
      74  	  return NIS_NOMEMORY;
      75  	}
      76        ++NIS_RES_OBJECT (res)->GR_data.gr_members.gr_members_len;
      77  
      78        /* Check the buffer bounds are not exceeded.  */
      79        assert (strlen (NIS_RES_OBJECT(res)->zo_name) + 1 < grouplen + 14);
      80        cp = stpcpy (buf, NIS_RES_OBJECT(res)->zo_name);
      81        *cp++ = '.';
      82        strncpy (cp, NIS_RES_OBJECT (res)->zo_domain, NIS_MAXNAMELEN);
      83        res2 = nis_modify (buf, NIS_RES_OBJECT (res));
      84        status = NIS_RES_STATUS (res2);
      85        nis_freeresult (res);
      86        nis_freeresult (res2);
      87  
      88        return status;
      89      }
      90    else
      91      return NIS_FAIL;
      92  }
      93  libnsl_hidden_nolink_def (nis_addmember, GLIBC_2_1)