shadow/fgetspent_r.c

   1 /* Copyright (C) 1996, 1997, 1998 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 Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    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    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include <ctype.h>
  20 #include <errno.h>
  21 #include <shadow.h>
  22 #include <stdio.h>
  23
  24 #ifdef USE_IN_LIBIO
  25 # define flockfile(s) _IO_flockfile (s)
  26 # define funlockfile(s) _IO_funlockfile (s)
  27 #endif
  28
  29 /* Define a line parsing function using the common code
  30    used in the nss_files module.  */
  31
  32 #define STRUCTURE       spwd
  33 #define ENTNAME         spent
  34 #define EXTERN_PARSER   1
  35 struct spent_data {};
  36
  37 #include <nss/nss_files/files-parse.c>
  38
  39
  40 /* Read one shadow entry from the given stream.  */
  41 int
  42 __fgetspent_r (FILE *stream, struct spwd *resbuf, char *buffer, size_t buflen,
  43                struct spwd **result)
  44 {
  45   char *p;
  46
  47   flockfile (stream);
  48   do
  49     {
  50       buffer[buflen - 1] = '\xff';
  51       p = fgets_unlocked (buffer, buflen, stream);
  52       if (p == NULL && feof_unlocked (stream))
  53         {
  54           funlockfile (stream);
  55           *result = NULL;
  56           return errno;
  57         }
  58       if (p == NULL || buffer[buflen - 1] != '\xff')
  59         {
  60           funlockfile (stream);
  61           *result = NULL;
  62           return errno = ERANGE;
  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)