gshadow/fgetsgent_r.c

   1 /* Copyright (C) 2009 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, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 #include <ctype.h>
  20 #include <errno.h>
  21 #include <gshadow.h>
  22 #include <stdio.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 #define EXTERN_PARSER   1
  30 struct sgent_data {};
  31
  32 #include <nss/nss_files/files-parse.c>
  33
  34
  35 /* Read one shadow entry from the given stream.  */
  36 int
  37 __fgetsgent_r (FILE *stream, struct sgrp *resbuf, char *buffer, size_t buflen,
  38                struct sgrp **result)
  39 {
  40   char *p;
  41
  42   _IO_flockfile (stream);
  43   do
  44     {
  45       buffer[buflen - 1] = '\xff';
  46       p = fgets_unlocked (buffer, buflen, stream);
  47       if (p == NULL && feof_unlocked (stream))
  48         {
  49           _IO_funlockfile (stream);
  50           *result = NULL;
  51           __set_errno (ENOENT);
  52           return errno;
  53         }
  54       if (p == NULL || buffer[buflen - 1] != '\xff')
  55         {
  56           _IO_funlockfile (stream);
  57           *result = NULL;
  58           __set_errno (ERANGE);
  59           return errno;
  60         }
  61
  62       /* Skip leading blanks.  */
  63       while (isspace (*p))
  64         ++p;
  65     } while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines.  */
  66              /* Parse the line.  If it is invalid, loop to
  67                 get the next line of the file to parse.  */
  68              ! parse_line (buffer, (void *) resbuf, (void *) buffer, buflen,
  69                            &errno));
  70
  71   _IO_funlockfile (stream);
  72
  73   *result = resbuf;
  74   return 0;
  75 }
  76 weak_alias (__fgetsgent_r, fgetsgent_r)