source3/winbindd/winbindd_group.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind daemon for ntdom nss module
   5
   6    Copyright (C) Tim Potter 2000
   7    Copyright (C) Jeremy Allison 2001.
   8    Copyright (C) Gerald (Jerry) Carter 2003.
   9    Copyright (C) Volker Lendecke 2005
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 #include "includes.h"
  26 #include "winbindd.h"
  27 #include "lib/dbwrap/dbwrap.h"
  28
  29 #undef DBGC_CLASS
  30 #define DBGC_CLASS DBGC_WINBIND
  31
  32 /* Fill a grent structure from various other information */
  33
  34 bool fill_grent(TALLOC_CTX *mem_ctx, struct winbindd_gr *gr,
  35                 const char *dom_name, const char *gr_name, gid_t unix_gid)
  36 {
  37         const char *full_group_name;
  38         char *mapped_name = NULL;
  39         NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;
  40
  41         nt_status = normalize_name_map(mem_ctx, dom_name, gr_name,
  42                                        &mapped_name);
  43
  44         /* Basic whitespace replacement */
  45         if (NT_STATUS_IS_OK(nt_status)) {
  46                 full_group_name = fill_domain_username_talloc(mem_ctx, dom_name,
  47                                      mapped_name, true);
  48         }
  49         /* Mapped to an aliase */
  50         else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_FILE_RENAMED)) {
  51                 full_group_name = mapped_name;
  52         }
  53         /* no change */
  54         else {
  55                 full_group_name = fill_domain_username_talloc(mem_ctx, dom_name,
  56                                       gr_name, True );
  57         }
  58
  59         if (full_group_name == NULL) {
  60                 return false;
  61         }
  62
  63         gr->gr_gid = unix_gid;
  64
  65         /* Group name and password */
  66
  67         strlcpy(gr->gr_name, full_group_name, sizeof(gr->gr_name));
  68         strlcpy(gr->gr_passwd, "x", sizeof(gr->gr_passwd));
  69
  70         return True;
  71 }
  72
  73 struct getgr_countmem {
  74         int num;
  75         size_t len;
  76 };
  77
  78 static int getgr_calc_memberlen(struct db_record *rec, void *private_data)
  79 {
  80         struct getgr_countmem *buf = private_data;
  81         TDB_DATA data = dbwrap_record_get_value(rec);
  82         size_t len;
  83
  84         buf->num += 1;
  85
  86         len = buf->len + data.dsize;
  87         if (len < buf->len) {
  88                 return 0;
  89         }
  90         buf->len = len;
  91         return 0;
  92 }
  93
  94 struct getgr_stringmem {
  95         size_t ofs;
  96         char *buf;
  97 };
  98
  99 static int getgr_unparse_members(struct db_record *rec, void *private_data)
 100 {
 101         struct getgr_stringmem *buf = private_data;
 102         TDB_DATA data = dbwrap_record_get_value(rec);
 103         int len;
 104
 105         len = data.dsize-1;
 106
 107         memcpy(buf->buf + buf->ofs, data.dptr, len);
 108         buf->ofs += len;
 109         buf->buf[buf->ofs] = ',';
 110         buf->ofs += 1;
 111         return 0;
 112 }
 113
 114 NTSTATUS winbindd_print_groupmembers(struct db_context *members,
 115                                      TALLOC_CTX *mem_ctx,
 116                                      int *num_members, char **result)
 117 {
 118         struct getgr_countmem c;
 119         struct getgr_stringmem m;
 120         int count;
 121         NTSTATUS status;
 122
 123         c.num = 0;
 124         c.len = 0;
 125
 126         status = dbwrap_traverse(members, getgr_calc_memberlen, &c, &count);
 127         if (!NT_STATUS_IS_OK(status)) {
 128                 DBG_NOTICE("dbwrap_traverse failed: %s\n", nt_errstr(status));
 129                 return status;
 130         }
 131
 132         m.ofs = 0;
 133         m.buf = talloc_array(mem_ctx, char, c.len);
 134         if (m.buf == NULL) {
 135                 DEBUG(5, ("talloc failed\n"));
 136                 return NT_STATUS_NO_MEMORY;
 137         }
 138
 139         status = dbwrap_traverse(members, getgr_unparse_members, &m, &count);
 140         if (!NT_STATUS_IS_OK(status)) {
 141                 TALLOC_FREE(m.buf);
 142                 DBG_NOTICE("dbwrap_traverse failed: %s\n", nt_errstr(status));
 143                 return status;
 144         }
 145         m.buf[c.len-1] = '\0';
 146
 147         *num_members = c.num;
 148         *result = m.buf;
 149         return NT_STATUS_OK;
 150 }