1  /* Copyright (C) 1991-2023 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 <ctype.h>
      19  #include <errno.h>
      20  #include <grp.h>
      21  #include <stdio.h>
      22  
      23  /* Define a line parsing function using the common code
      24     used in the nss_files module.  */
      25  
      26  #define STRUCTURE	group
      27  #define ENTNAME		grent
      28  struct grent_data {};
      29  
      30  #define TRAILING_LIST_MEMBER		gr_mem
      31  #define TRAILING_LIST_SEPARATOR_P(c)	((c) == ',')
      32  #include <nss/nss_files/files-parse.c>
      33  LINE_PARSER
      34  (,
      35   STRING_FIELD (result->gr_name, ISCOLON, 0);
      36   if (line[0] == '\0'
      37       && (result->gr_name[0] == '+' || result->gr_name[0] == '-'))
      38     {
      39       result->gr_passwd = NULL;
      40       result->gr_gid = 0;
      41     }
      42   else
      43     {
      44       STRING_FIELD (result->gr_passwd, ISCOLON, 0);
      45       if (result->gr_name[0] == '+' || result->gr_name[0] == '-')
      46         INT_FIELD_MAYBE_NULL (result->gr_gid, ISCOLON, 0, 10, , 0)
      47       else
      48         INT_FIELD (result->gr_gid, ISCOLON, 0, 10,)
      49     }
      50   )
      51  
      52  
      53  /* Read one entry from the given stream.  */
      54  int
      55  __fgetgrent_r (FILE *stream, struct group *resbuf, char *buffer, size_t buflen,
      56  	       struct group **result)
      57  {
      58    int ret = __nss_fgetent_r (stream, resbuf, buffer, buflen, parse_line);
      59    if (ret == 0)
      60      *result = resbuf;
      61    else
      62      *result = NULL;
      63    return ret;
      64  }
      65  weak_alias (__fgetgrent_r, fgetgrent_r)