nss/sgetsgent_r.c

   1 /* Copyright (C) 2009-2023 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 <gshadow.h>
  21 #include <stdio.h>
  22 #include <string.h>
  23
  24 /* Define a line parsing function using the common code
  25    used in the nss_files module.  */
  26
  27 #define STRUCTURE       sgrp
  28 #define ENTNAME         sgent
  29 struct sgent_data {};
  30
  31
  32 #define TRAILING_LIST_MEMBER            sg_mem
  33 #define TRAILING_LIST_SEPARATOR_P(c)    ((c) == ',')
  34 #include <nss/nss_files/files-parse.c>
  35 LINE_PARSER
  36 (,
  37  STRING_FIELD (result->sg_namp, ISCOLON, 0);
  38  if (line[0] == '\0'
  39      && (result->sg_namp[0] == '+' || result->sg_namp[0] == '-'))
  40    {
  41      result->sg_passwd = NULL;
  42      result->sg_adm = NULL;
  43      result->sg_mem = NULL;
  44    }
  45  else
  46    {
  47      STRING_FIELD (result->sg_passwd, ISCOLON, 0);
  48      STRING_LIST (result->sg_adm, ':');
  49    }
  50  )
  51
  52
  53 /* Read one shadow entry from the given stream.  */
  54 int
  55 __sgetsgent_r (const char *string, struct sgrp *resbuf, char *buffer,
  56                size_t buflen, struct sgrp **result)
  57 {
  58   char *sp;
  59   if (string < buffer || string >= buffer + buflen)
  60     {
  61       buffer[buflen - 1] = '\0';
  62       sp = strncpy (buffer, string, buflen);
  63       if (buffer[buflen - 1] != '\0')
  64         {
  65           __set_errno (ERANGE);
  66           return ERANGE;
  67         }
  68     }
  69   else
  70     sp = (char *) string;
  71
  72   int parse_result = parse_line (sp, resbuf, (void *) buffer, buflen, &errno);
  73   *result = parse_result > 0 ? resbuf : NULL;
  74
  75   return *result == NULL ? errno : 0;
  76 }
  77 weak_alias (__sgetsgent_r, sgetsgent_r)