source/groupdb/groupfile.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_SMBPASS_DB
  23
  24 static int gp_file_lock_depth = 0;
  25
  26 static char s_readbuf[1024];
  27
  28 /***************************************************************
  29  Start to enumerate the grppasswd list. Returns a void pointer
  30  to ensure no modification outside this module.
  31 ****************************************************************/
  32
  33 static void *startgrpfilepwent(BOOL update)
  34 {
  35         return startfilepwent(lp_smb_group_file(),
  36                               s_readbuf, sizeof(s_readbuf),
  37                               &gp_file_lock_depth, update);
  38 }
  39
  40 /***************************************************************
  41  End enumeration of the grppasswd list.
  42 ****************************************************************/
  43
  44 static void endgrpfilepwent(void *vp)
  45 {
  46         endfilepwent(vp, &gp_file_lock_depth);
  47 }
  48
  49 /*************************************************************************
  50  Return the current position in the grppasswd list as an SMB_BIG_UINT.
  51  This must be treated as an opaque token.
  52 *************************************************************************/
  53 static SMB_BIG_UINT getgrpfilepwpos(void *vp)
  54 {
  55         return getfilepwpos(vp);
  56 }
  57
  58 /*************************************************************************
  59  Set the current position in the grppasswd list from an SMB_BIG_UINT.
  60  This must be treated as an opaque token.
  61 *************************************************************************/
  62 static BOOL setgrpfilepwpos(void *vp, SMB_BIG_UINT tok)
  63 {
  64         return setfilepwpos(vp, tok);
  65 }
  66
  67 static BOOL make_group_line(char *p, int max_len,
  68                                 DOMAIN_GRP *grp,
  69                                 DOMAIN_GRP_MEMBER **mem, int *num_mem)
  70 {
  71         int i;
  72         int len;
  73         len = slprintf(p, max_len-1, "%s:%s:%d:", grp->name, grp->comment, grp->rid);
  74
  75         if (len == -1)
  76         {
  77                 DEBUG(0,("make_group_line: cannot create entry\n"));
  78                 return False;
  79         }
  80
  81         p += len;
  82         max_len -= len;
  83
  84         if (mem == NULL || num_mem == NULL)
  85         {
  86                 return True;
  87         }
  88
  89         for (i = 0; i < (*num_mem); i++)
  90         {
  91                 len = strlen((*mem)[i].name);
  92                 p = safe_strcpy(p, (*mem)[i].name, max_len);
  93
  94                 if (p == NULL)
  95                 {
  96                         DEBUG(0, ("make_group_line: out of space for groups!\n"));
  97                         return False;
  98                 }
  99
 100                 max_len -= len;
 101
 102                 if (i != (*num_mem)-1)
 103                 {
 104                         *p = ',';
 105                         p++;
 106                         max_len--;
 107                 }
 108         }
 109
 110         return True;
 111 }
 112
 113 /*************************************************************************
 114  Routine to return the next entry in the smbdomaingroup list.
 115  *************************************************************************/
 116 static char *get_group_members(char *p, int *num_mem, DOMAIN_GRP_MEMBER **members)
 117 {
 118         fstring name;
 119
 120         if (num_mem == NULL || members == NULL)
 121         {
 122                 return NULL;
 123         }
 124
 125         (*num_mem) = 0;
 126         (*members) = NULL;
 127
 128         while (next_token(&p, name, ",", sizeof(fstring)))
 129         {
 130                 DOMAIN_GRP_MEMBER *mbrs;
 131
 132                 mbrs = (DOMAIN_GRP_MEMBER *)Realloc((*members), ((*num_mem)+1) * sizeof(DOMAIN_GRP_MEMBER));
 133                 if (mbrs == NULL) {
 134                         if (*members)
 135                                 free(*members);
 136             return NULL;
 137         } else
 138                         (*members) = mbrs;
 139                 fstrcpy((*members)[(*num_mem)].name, name);
 140                 (*members)[(*num_mem)].attr = 0x07;
 141                 (*num_mem)++;
 142         }
 143         return p;
 144 }
 145
 146 /*************************************************************************
 147  Routine to return the next entry in the smbdomaingroup list.
 148  *************************************************************************/
 149 static DOMAIN_GRP *getgrpfilepwent(void *vp, DOMAIN_GRP_MEMBER **mem, int *num_mem)
 150 {
 151         /* Static buffers we will return. */
 152         static DOMAIN_GRP gp_buf;
 153
 154         int gidval;
 155
 156         pstring linebuf;
 157         char  *p;
 158         size_t            linebuf_len;
 159
 160         gpdb_init_grp(&gp_buf);
 161
 162         /*
 163          * Scan the file, a line at a time and check if the name matches.
 164          */
 165         while ((linebuf_len = getfileline(vp, linebuf, sizeof(linebuf))) > 0)
 166         {
 167                 /* get group name */
 168
 169                 p = strncpyn(gp_buf.name, linebuf, sizeof(gp_buf.name), ':');
 170                 if (p == NULL)
 171                 {
 172                         DEBUG(0, ("getgrpfilepwent: malformed group entry (no :)\n"));
 173                         continue;
 174                 }
 175
 176                 /* Go past ':' */
 177                 p++;
 178
 179                 /* get group comment */
 180
 181                 p = strncpyn(gp_buf.comment, p, sizeof(gp_buf.comment), ':');
 182                 if (p == NULL)
 183                 {
 184                         DEBUG(0, ("getgrpfilepwent: malformed group entry (no :)\n"));
 185                         continue;
 186                 }
 187
 188                 /* Go past ':' */
 189                 p++;
 190
 191                 /* Get group gid. */
 192
 193                 p = Atoic(p, &gidval, ":");
 194
 195                 if (p == NULL)
 196                 {
 197                         DEBUG(0, ("getgrpfilepwent: malformed group entry (no : after uid)\n"));
 198                         continue;
 199                 }
 200
 201                 /* Go past ':' */
 202                 p++;
 203
 204                 /* now get the user's groups.  there are a maximum of 32 */
 205
 206                 if (mem != NULL && num_mem != NULL)
 207                 {
 208                         (*mem) = NULL;
 209                         (*num_mem) = 0;
 210
 211                         p = get_group_members(p, num_mem, mem);
 212                         if (p == NULL)
 213                         {
 214                                 DEBUG(0, ("getgrpfilepwent: malformed group entry (no : after members)\n"));
 215                         }
 216                 }
 217
 218                 /* ok, set up the static data structure and return it */
 219
 220                 gp_buf.rid     = pwdb_gid_to_group_rid((gid_t)gidval);
 221                 gp_buf.attr    = 0x07;
 222
 223                 make_group_line(linebuf, sizeof(linebuf), &gp_buf, mem, num_mem);
 224                 DEBUG(10,("line: '%s'\n", linebuf));
 225
 226                 return &gp_buf;
 227         }
 228
 229         DEBUG(5,("getgrpfilepwent: end of file reached.\n"));
 230         return NULL;
 231 }
 232
 233 /************************************************************************
 234  Routine to add an entry to the grppasswd file.
 235 *************************************************************************/
 236
 237 static BOOL add_grpfilegrp_entry(DOMAIN_GRP *newgrp)
 238 {
 239         DEBUG(0, ("add_grpfilegrp_entry: NOT IMPLEMENTED\n"));
 240         return False;
 241 }
 242
 243 /************************************************************************
 244  Routine to search the grppasswd file for an entry matching the groupname.
 245  and then modify its group entry. We can't use the startgrppwent()/
 246  getgrppwent()/endgrppwent() interfaces here as we depend on looking
 247  in the actual file to decide how much room we have to write data.
 248  override = False, normal
 249  override = True, override XXXXXXXX'd out group or NO PASS
 250 ************************************************************************/
 251
 252 static BOOL mod_grpfilegrp_entry(DOMAIN_GRP* grp)
 253 {
 254         DEBUG(0, ("mod_grpfilegrp_entry: NOT IMPLEMENTED\n"));
 255         return False;
 256 }
 257
 258
 259 static struct groupdb_ops file_ops =
 260 {
 261         startgrpfilepwent,
 262         endgrpfilepwent,
 263         getgrpfilepwpos,
 264         setgrpfilepwpos,
 265
 266         iterate_getgroupnam,          /* In groupdb.c */
 267         iterate_getgroupgid,          /* In groupdb.c */
 268         iterate_getgrouprid,          /* In groupdb.c */
 269         getgrpfilepwent,
 270
 271         add_grpfilegrp_entry,
 272         mod_grpfilegrp_entry,
 273
 274         iterate_getusergroupsnam      /* in groupdb.c */
 275 };
 276
 277 struct groupdb_ops *file_initialise_group_db(void)
 278 {
 279         return &file_ops;
 280 }
 281
 282 #else
 283  /* Do *NOT* make this function static. It breaks the compile on gcc. JRA */
 284  void grppass_dummy_function(void) { } /* stop some compilers complaining */
 285 #endif /* USE_SMBPASS_DB */