pwd/fgetpwent_r.c

   1 /* Copyright (C) 1991, 1996 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
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include <ctype.h>
  20 #include <stdio.h>
  21 #include <pwd.h>
  22
  23 /* Define a line parsing function using the common code
  24    used in the nss_files module.  */
  25
  26 #define STRUCTURE       passwd
  27 #define ENTNAME         pwent
  28 struct pwent_data {};
  29
  30 #include "../nss/nss_files/files-parse.c"
  31 LINE_PARSER
  32 (,
  33  STRING_FIELD (result->pw_name, ISCOLON, 0);
  34  STRING_FIELD (result->pw_passwd, ISCOLON, 0);
  35  if (result->pw_name[0] == '+' || result->pw_name[0] == '-')
  36    {
  37      INT_FIELD_MAYBE_NULL (result->pw_uid, ISCOLON, 0, 10, , 0)
  38      INT_FIELD_MAYBE_NULL (result->pw_gid, ISCOLON, 0, 10, , 0)
  39    }
  40  else
  41    {
  42      INT_FIELD (result->pw_uid, ISCOLON, 0, 10,)
  43      INT_FIELD (result->pw_gid, ISCOLON, 0, 10,)
  44    }
  45  STRING_FIELD (result->pw_gecos, ISCOLON, 0);
  46  STRING_FIELD (result->pw_dir, ISCOLON, 0);
  47  result->pw_shell = line;
  48  )
  49
  50
  51 /* Read one entry from the given stream.  */
  52 int
  53 __fgetpwent_r (FILE *stream, struct passwd *resbuf, char *buffer,
  54                size_t buflen, struct passwd **result)
  55 {
  56   char *p;
  57
  58   do
  59     {
  60       p = fgets (buffer, buflen, stream);
  61       if (p == NULL)
  62         {
  63           *result = NULL;
  64           return errno;
  65         }
  66
  67       /* Skip leading blanks.  */
  68       while (isspace (*p))
  69         ++p;
  70     } while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines.  */
  71              /* Parse the line.  If it is invalid, loop to
  72                 get the next line of the file to parse.  */
  73              ! parse_line (p, resbuf, (void *) buffer, buflen));
  74
  75   *result = resbuf;
  76   return 0;
  77 }
  78 weak_alias (__fgetpwent_r, fgetpwent_r)