source/passdb/smbpassgroup.c

   1 /*
   2  * Unix SMB/Netbios implementation. Version 1.9. SMB parameters and setup
   3  * Copyright (C) Andrew Tridgell 1992-1998 Modified by Jeremy Allison 1995.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it under
   6  * the terms of the GNU General Public License as published by the Free
   7  * Software Foundation; either version 2 of the License, or (at your option)
   8  * any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program; if not, write to the Free Software Foundation, Inc., 675
  17  * Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #include "includes.h"
  21
  22 #ifdef USE_SMBGROUP_DB
  23
  24 static int grp_file_lock_depth = 0;
  25 extern int DEBUGLEVEL;
  26
  27 /***************************************************************
  28  Start to enumerate the smbpasswd list. Returns a void pointer
  29  to ensure no modification outside this module.
  30 ****************************************************************/
  31
  32 static void *startsmbfilegrpent(BOOL update)
  33 {
  34         static char s_readbuf[1024];
  35         return startfileent(lp_smb_passgrp_file(), s_readbuf, sizeof(s_readbuf),
  36                               &grp_file_lock_depth, update);
  37 }
  38
  39 /***************************************************************
  40  End enumeration of the smbpasswd list.
  41 ****************************************************************/
  42
  43 static void endsmbfilegrpent(void *vp)
  44 {
  45         endfileent(vp, &grp_file_lock_depth);
  46 }
  47
  48 /*************************************************************************
  49  Return the current position in the smbpasswd list as an SMB_BIG_UINT.
  50  This must be treated as an opaque token.
  51 *************************************************************************/
  52
  53 static SMB_BIG_UINT getsmbfilegrppos(void *vp)
  54 {
  55         return getfilepwpos(vp);
  56 }
  57
  58 /*************************************************************************
  59  Set the current position in the smbpasswd list from an SMB_BIG_UINT.
  60  This must be treated as an opaque token.
  61 *************************************************************************/
  62
  63 static BOOL setsmbfilegrppos(void *vp, SMB_BIG_UINT tok)
  64 {
  65         return setfilepwpos(vp, tok);
  66 }
  67
  68 /*************************************************************************
  69  Routine to return the next entry in the smbpasswd list.
  70  *************************************************************************/
  71 static struct smb_passwd *getsmbfilegrpent(void *vp,
  72                 uint32 **grp_rids, int *num_grps,
  73                 uint32 **als_rids, int *num_alss)
  74 {
  75         /* Static buffers we will return. */
  76         static struct smb_passwd pw_buf;
  77         static pstring  user_name;
  78         struct passwd *pwfile;
  79         pstring         linebuf;
  80         char  *p;
  81         int            uidval;
  82
  83         if (vp == NULL)
  84         {
  85                 DEBUG(0,("getsmbfilegrpent: Bad password file pointer.\n"));
  86                 return NULL;
  87         }
  88
  89         pwdb_init_smb(&pw_buf);
  90
  91         /*
  92          * Scan the file, a line at a time.
  93          */
  94         while (getfileline(vp, linebuf, sizeof(linebuf)) > 0)
  95         {
  96                 /*
  97                  * The line we have should be of the form :-
  98                  *
  99                  * username:uid:aliasrid1,aliasrid2..:domainrid1,domainrid2..:
 100                  */
 101
 102                 /*
 103                  * As 256 is shorter than a pstring we don't need to check
 104                  * length here - if this ever changes....
 105                  */
 106                 p = strncpyn(user_name, linebuf, sizeof(user_name), ':');
 107
 108                 if (p == NULL)
 109                 {
 110                         DEBUG(0,("getsmbfilegrpent: no ':' separator found\n"));
 111                         continue;
 112                 }
 113
 114                 /* Go past ':' */
 115                 p++;
 116
 117                 /* Get smb uid. */
 118
 119                 p = Atoic((char *) p, &uidval, ":");
 120
 121                 pw_buf.smb_name = user_name;
 122                 pw_buf.unix_uid = uidval;
 123
 124                 /*
 125                  * Now get a list of alias RIDs
 126                  */
 127
 128                 /* Skip the ':' */
 129                 p++;
 130
 131                 if (als_rids != NULL && num_alss != NULL)
 132                 {
 133                         int i;
 134                         p = get_numlist(p, als_rids, num_alss);
 135                         if (p == NULL)
 136                         {
 137                                 DEBUG(0,("getsmbfilegrpent: invalid line\n"));
 138                                 return NULL;
 139                         }
 140                 }
 141
 142                 /*
 143                  * Now get a list of group RIDs
 144                  */
 145
 146                 /* Skip the ':' */
 147                 p++;
 148
 149                 if (grp_rids != NULL && num_grps != NULL)
 150                 {
 151                         int i;
 152                         p = get_numlist(p, grp_rids, num_grps);
 153                         if (p == NULL)
 154                         {
 155                                 DEBUG(0,("getsmbfilegrpent: invalid line\n"));
 156                                 return NULL;
 157                         }
 158                 }
 159
 160                 pwfile = Get_Pwnam(pw_buf.smb_name, False);
 161                 if (pwfile == NULL)
 162                 {
 163                         DEBUG(0,("getsmbfilegrpent: smbpasswd database is corrupt!\n"));
 164                         DEBUG(0,("getsmbfilegrpent: username %s not in unix passwd database!\n", pw_buf.smb_name));
 165                         return NULL;
 166                 }
 167
 168                 return &pw_buf;
 169         }
 170
 171         DEBUG(5,("getsmbfilegrpent: end of file reached.\n"));
 172         return NULL;
 173 }
 174
 175 static struct passgrp_ops file_ops =
 176 {
 177         startsmbfilegrpent,
 178         endsmbfilegrpent,
 179         getsmbfilegrppos,
 180         setsmbfilegrppos,
 181         iterate_getsmbgrpnam,          /* In passgrp.c */
 182         iterate_getsmbgrpuid,          /* In passgrp.c */
 183         iterate_getsmbgrprid,          /* In passgrp.c */
 184         getsmbfilegrpent,
 185 };
 186
 187 struct passgrp_ops *file_initialise_password_grp(void)
 188 {
 189   return &file_ops;
 190 }
 191
 192 #else
 193  /* Do *NOT* make this function static. It breaks the compile on gcc. JRA */
 194  void smbpassgroup_dummy_function(void) { } /* stop some compilers complaining */
 195 #endif /* USE_SMBPASS_DB */