shadow/sgetspent_r.c

   1 /* Copyright (C) 1996-2023 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 <shadow.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       spwd
  28 #define ENTNAME         spent
  29 struct spent_data {};
  30
  31 /* Predicate which always returns false, needed below.  */
  32 #define FALSEP(arg) 0
  33
  34
  35 #include <nss/nss_files/files-parse.c>
  36 LINE_PARSER
  37 (,
  38  STRING_FIELD (result->sp_namp, ISCOLON, 0);
  39  if (line[0] == '\0'
  40      && (result->sp_namp[0] == '+' || result->sp_namp[0] == '-'))
  41    {
  42      result->sp_pwdp = NULL;
  43      result->sp_lstchg = 0;
  44      result->sp_min = 0;
  45      result->sp_max = 0;
  46      result->sp_warn = -1l;
  47      result->sp_inact = -1l;
  48      result->sp_expire = -1l;
  49      result->sp_flag = ~0ul;
  50    }
  51  else
  52    {
  53      STRING_FIELD (result->sp_pwdp, ISCOLON, 0);
  54      INT_FIELD_MAYBE_NULL (result->sp_lstchg, ISCOLON, 0, 10, (long int) (int),
  55                            (long int) -1);
  56      INT_FIELD_MAYBE_NULL (result->sp_min, ISCOLON, 0, 10, (long int) (int),
  57                            (long int) -1);
  58      INT_FIELD_MAYBE_NULL (result->sp_max, ISCOLON, 0, 10, (long int) (int),
  59                            (long int) -1);
  60      while (isspace (*line))
  61        ++line;
  62      if (*line == '\0')
  63        {
  64          /* The old form.  */
  65          result->sp_warn = -1l;
  66          result->sp_inact = -1l;
  67          result->sp_expire = -1l;
  68          result->sp_flag = ~0ul;
  69        }
  70      else
  71        {
  72          INT_FIELD_MAYBE_NULL (result->sp_warn, ISCOLON, 0, 10,
  73                                (long int) (int), (long int) -1);
  74          INT_FIELD_MAYBE_NULL (result->sp_inact, ISCOLON, 0, 10,
  75                                (long int) (int), (long int) -1);
  76          INT_FIELD_MAYBE_NULL (result->sp_expire, ISCOLON, 0, 10,
  77                                (long int) (int), (long int) -1);
  78          if (*line != '\0')
  79            INT_FIELD_MAYBE_NULL (result->sp_flag, FALSEP, 0, 10,
  80                                  (unsigned long int), ~0ul)
  81          else
  82            result->sp_flag = ~0ul;
  83        }
  84    }
  85  )
  86
  87
  88 /* Read one shadow entry from the given stream.  */
  89 int
  90 __sgetspent_r (const char *string, struct spwd *resbuf, char *buffer,
  91                size_t buflen, struct spwd **result)
  92 {
  93   buffer[buflen - 1] = '\0';
  94   char *sp = strncpy (buffer, string, buflen);
  95   if (buffer[buflen - 1] != '\0')
  96     return ERANGE;
  97
  98   int parse_result = parse_line (sp, resbuf, NULL, 0, &errno);
  99   *result = parse_result > 0 ? resbuf : NULL;
 100
 101   return *result == NULL ? errno : 0;
 102 }
 103 weak_alias (__sgetspent_r, sgetspent_r)