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