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         D_DEBUG("Filling domain '%s' and group '%s'.\n", dom_name, gr_name);
  45         /* Basic whitespace replacement */
  46         if (NT_STATUS_IS_OK(nt_status)) {
  47                 full_group_name = fill_domain_username_talloc(mem_ctx, dom_name,
  48                                      mapped_name, true);
  49         }
  50         /* Mapped to an aliase */
  51         else if (NT_STATUS_EQUAL(nt_status, NT_STATUS_FILE_RENAMED)) {
  52                 full_group_name = mapped_name;
  53         }
  54         /* no change */
  55         else {
  56                 full_group_name = fill_domain_username_talloc(mem_ctx, dom_name,
  57                                       gr_name, True );
  58         }
  59
  60         if (full_group_name == NULL) {
  61                 D_DEBUG("Returning false, since there is no full group name.\n");
  62                 return false;
  63         }
  64
  65         gr->gr_gid = unix_gid;
  66
  67         /* Group name and password */
  68
  69         strlcpy(gr->gr_name, full_group_name, sizeof(gr->gr_name));
  70         strlcpy(gr->gr_passwd, "x", sizeof(gr->gr_passwd));
  71
  72         D_DEBUG("Returning true. Full group name is '%s'.\n", gr_name);
  73         return True;
  74 }
  75
  76 struct getgr_countmem {
  77         int num;
  78         size_t len;
  79 };
  80
  81 static int getgr_calc_memberlen(struct db_record *rec, void *private_data)
  82 {
  83         struct getgr_countmem *buf = private_data;
  84         TDB_DATA data = dbwrap_record_get_value(rec);
  85         size_t len;
  86
  87         buf->num += 1;
  88
  89         len = buf->len + data.dsize;
  90         if (len < buf->len) {
  91                 return 0;
  92         }
  93         buf->len = len;
  94         return 0;
  95 }
  96
  97 struct getgr_stringmem {
  98         size_t ofs;
  99         char *buf;
 100 };
 101
 102 static int getgr_unparse_members(struct db_record *rec, void *private_data)
 103 {
 104         struct getgr_stringmem *buf = private_data;
 105         TDB_DATA data = dbwrap_record_get_value(rec);
 106         int len;
 107
 108         len = data.dsize-1;
 109
 110         memcpy(buf->buf + buf->ofs, data.dptr, len);
 111         buf->ofs += len;
 112         buf->buf[buf->ofs] = ',';
 113         buf->ofs += 1;
 114         return 0;
 115 }
 116
 117 NTSTATUS winbindd_print_groupmembers(struct db_context *members,
 118                                      TALLOC_CTX *mem_ctx,
 119                                      int *num_members, char **result)
 120 {
 121         struct getgr_countmem c;
 122         struct getgr_stringmem m;
 123         int count;
 124         NTSTATUS status;
 125
 126         c.num = 0;
 127         c.len = 0;
 128
 129         status = dbwrap_traverse(members, getgr_calc_memberlen, &c, &count);
 130         if (!NT_STATUS_IS_OK(status)) {
 131                 DBG_NOTICE("dbwrap_traverse failed: %s\n", nt_errstr(status));
 132                 return status;
 133         }
 134
 135         m.ofs = 0;
 136         m.buf = talloc_array(mem_ctx, char, c.len);
 137         if (m.buf == NULL) {
 138                 D_WARNING("talloc failed\n");
 139                 return NT_STATUS_NO_MEMORY;
 140         }
 141
 142         status = dbwrap_traverse(members, getgr_unparse_members, &m, &count);
 143         if (!NT_STATUS_IS_OK(status)) {
 144                 TALLOC_FREE(m.buf);
 145                 DBG_NOTICE("dbwrap_traverse failed: %s\n", nt_errstr(status));
 146                 return status;
 147         }
 148         if (c.len > 0) {
 149                 m.buf[c.len - 1] = '\0';
 150         }
 151
 152         *num_members = c.num;
 153         *result = m.buf;
 154         D_DEBUG("Returning %d member(s).\n", *num_members);
 155         return NT_STATUS_OK;
 156 }