shadow/fgetspent_r.c

   1 /* Copyright (C) 1996, 1997, 1998, 1999, 2011 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 <shadow.h>
  22 #include <stdio.h>
  23
  24 #define flockfile(s) _IO_flockfile (s)
  25 #define funlockfile(s) _IO_funlockfile (s)
  26
  27 /* Define a line parsing function using the common code
  28    used in the nss_files module.  */
  29
  30 #define STRUCTURE       spwd
  31 #define ENTNAME         spent
  32 #define EXTERN_PARSER   1
  33 struct spent_data {};
  34
  35 #include <nss/nss_files/files-parse.c>
  36
  37
  38 /* Read one shadow entry from the given stream.  */
  39 int
  40 __fgetspent_r (FILE *stream, struct spwd *resbuf, char *buffer, size_t buflen,
  41                struct spwd **result)
  42 {
  43   char *p;
  44
  45   flockfile (stream);
  46   do
  47     {
  48       buffer[buflen - 1] = '\xff';
  49       p = fgets_unlocked (buffer, buflen, stream);
  50       if (p == NULL && feof_unlocked (stream))
  51         {
  52           funlockfile (stream);
  53           *result = NULL;
  54           __set_errno (ENOENT);
  55           return errno;
  56         }
  57       if (p == NULL || buffer[buflen - 1] != '\xff')
  58         {
  59           funlockfile (stream);
  60           *result = NULL;
  61           __set_errno (ERANGE);
  62           return errno;
  63         }
  64
  65       /* Skip leading blanks.  */
  66       while (isspace (*p))
  67         ++p;
  68     } while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines.  */
  69              /* Parse the line.  If it is invalid, loop to
  70                 get the next line of the file to parse.  */
  71              ! parse_line (buffer, (void *) resbuf, NULL, 0, &errno));
  72
  73   funlockfile (stream);
  74
  75   *result = resbuf;
  76   return 0;
  77 }
  78 weak_alias (__fgetspent_r, fgetspent_r)