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