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 /* 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 #define EXTERN_PARSER   1
  30 struct spent_data {};
  31
  32 #include <nss/nss_files/files-parse.c>
  33
  34
  35 /* Read one shadow entry from the given stream.  */
  36 int
  37 __fgetspent_r (FILE *stream, struct spwd *resbuf, char *buffer, size_t buflen,
  38                struct spwd **result)
  39 {
  40   char *p;
  41
  42   do
  43     {
  44       buffer[buflen] = '\xff';
  45       p = fgets (buffer, buflen, stream);
  46       if (p == NULL && feof (stream))
  47         {
  48           *result = NULL;
  49           return errno;
  50         }
  51       if (p == NULL || buffer[buflen] != '\xff')
  52         {
  53           *result = NULL;
  54           return errno = ERANGE;
  55         }
  56
  57       /* Skip leading blanks.  */
  58       while (isspace (*p))
  59         ++p;
  60     } while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines.  */
  61              /* Parse the line.  If it is invalid, loop to
  62                 get the next line of the file to parse.  */
  63              ! parse_line (buffer, (void *) resbuf, NULL, 0,
  64                            __errno_location ()));
  65
  66   *result = resbuf;
  67   return 0;
  68 }
  69 weak_alias (__fgetspent_r, fgetspent_r)