pwd/fgetpwent.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 <stdio.h>
  20 #include <pwd.h>
  21
  22 /* Define a line parsing function using the common code
  23    used in the nss_files module.  */
  24
  25 #define STRUCTURE       passwd
  26 #define ENTNAME         pwent
  27 struct pwent_data {};
  28
  29 #include "../nss/nss_files/files-parse.c"
  30 LINE_PARSER
  31 (,
  32  STRING_FIELD (result->pw_name, ISCOLON, 0);
  33  STRING_FIELD (result->pw_passwd, ISCOLON, 0);
  34  INT_FIELD (result->pw_uid, ISCOLON, 0, 10,);
  35  INT_FIELD (result->pw_gid, ISCOLON, 0, 10,);
  36  STRING_FIELD (result->pw_gecos, ISCOLON, 0);
  37  STRING_FIELD (result->pw_dir, ISCOLON, 0);
  38  result->pw_shell = line;
  39  )
  40
  41
  42 /* Read one entry from the given stream.  */
  43 struct passwd *
  44 fgetpwent (FILE *stream)
  45 {
  46   static char buffer[BUFSIZ];
  47   static struct passwd result;
  48   char *p;
  49
  50   do
  51     {
  52       p = fgets (buffer, sizeof buffer, stream);
  53       if (p == NULL)
  54         return NULL;
  55
  56       /* Skip leading blanks.  */
  57       while (isspace (*p))
  58         ++p;
  59     } while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines.  */
  60              /* Parse the line.  If it is invalid, loop to
  61                 get the next line of the file to parse.  */
  62              ! parse_line (p, &result, (void *) buffer, sizeof buffer));
  63
  64   return &result;
  65 }