hesiod/nss_hesiod/hesiod-pwd.c

   1 /* Copyright (C) 1997, 2000, 2002 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Mark Kettenis <kettenis@phys.uva.nl>, 1997.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <errno.h>
  21 #include <hesiod.h>
  22 #include <pwd.h>
  23 #include <nss.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27
  28 #include "nss_hesiod.h"
  29
  30 /* Get the declaration of the parser function.  */
  31 #define ENTNAME pwent
  32 #define STRUCTURE passwd
  33 #define EXTERN_PARSER
  34 #include <nss/nss_files/files-parse.c>
  35
  36 enum nss_status
  37 _nss_hesiod_setpwent (int stayopen)
  38 {
  39   return NSS_STATUS_SUCCESS;
  40 }
  41
  42 enum nss_status
  43 _nss_hesiod_endpwent (void)
  44 {
  45   return NSS_STATUS_SUCCESS;
  46 }
  47
  48 static enum nss_status
  49 lookup (const char *name, const char *type, struct passwd *pwd,
  50         char *buffer, size_t buflen, int *errnop)
  51 {
  52   struct parser_data *data = (void *) buffer;
  53   size_t linebuflen;
  54   void *context;
  55   char **list;
  56   int parse_res;
  57   size_t len;
  58   int olderr = errno;
  59
  60   context = _nss_hesiod_init ();
  61   if (context == NULL)
  62     return NSS_STATUS_UNAVAIL;
  63
  64   list = hesiod_resolve (context, name, type);
  65   if (list == NULL)
  66     {
  67       int err = errno;
  68       hesiod_end (context);
  69       __set_errno (olderr);
  70       return err == ENOENT ? NSS_STATUS_NOTFOUND : NSS_STATUS_UNAVAIL;
  71     }
  72
  73   linebuflen = buffer + buflen - data->linebuffer;
  74   len = strlen (*list) + 1;
  75   if (linebuflen < len)
  76     {
  77       hesiod_free_list (context, list);
  78       hesiod_end (context);
  79       *errnop = ERANGE;
  80       return NSS_STATUS_TRYAGAIN;
  81     }
  82
  83   memcpy (data->linebuffer, *list, len);
  84   hesiod_free_list (context, list);
  85   hesiod_end (context);
  86
  87   parse_res = _nss_files_parse_pwent (buffer, pwd, data, buflen, errnop);
  88   if (parse_res < 1)
  89     {
  90       __set_errno (olderr);
  91       return parse_res == -1 ? NSS_STATUS_TRYAGAIN : NSS_STATUS_NOTFOUND;
  92     }
  93
  94   return NSS_STATUS_SUCCESS;
  95 }
  96
  97 enum nss_status
  98 _nss_hesiod_getpwnam_r (const char *name, struct passwd *pwd,
  99                         char *buffer, size_t buflen, int *errnop)
 100 {
 101   return lookup (name, "passwd", pwd, buffer, buflen, errnop);
 102 }
 103
 104 enum nss_status
 105 _nss_hesiod_getpwuid_r (uid_t uid, struct passwd *pwd,
 106                         char *buffer, size_t buflen, int *errnop)
 107 {
 108   char uidstr[21];      /* We will probably never have a gid_t with more
 109                            than 64 bits.  */
 110
 111   snprintf (uidstr, sizeof uidstr, "%d", uid);
 112
 113   return lookup (uidstr, "uid", pwd, buffer, buflen, errnop);
 114 }