2 Unix SMB/Netbios implementation.
5 Copyright (C) Jeremy Allison 1998.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 extern int DEBUGLEVEL;
24 extern DOM_SID global_machine_sid;
27 /**************************************************************************
28 Groupname map functionality. The code loads a groupname map file and
29 (currently) loads it into a linked list. This is slow and memory
30 hungry, but can be changed into a more efficient storage format
31 if the demands on it become excessive.
32 ***************************************************************************/
34 typedef struct groupname_map {
41 } groupname_map_entry;
43 static ubi_slList groupname_map_list;
45 /**************************************************************************
46 Delete all the entries in the groupname map list.
47 ***************************************************************************/
49 static void delete_groupname_map_list(void)
51 groupname_map_entry *gmep;
53 while((gmep = (groupname_map_entry *)ubi_slRemHead( &groupname_map_list )) != NULL) {
54 if(gmep->windows_name)
55 free(gmep->windows_name);
57 free(gmep->unix_name);
62 /**************************************************************************
63 Load a groupname map file. Sets last accessed timestamp.
64 ***************************************************************************/
66 void load_groupname_map(void)
68 static time_t groupmap_file_last_modified = (time_t)0;
69 static BOOL initialized = False;
70 char *groupname_map_file = lp_groupname_map();
75 groupname_map_entry *new_ep;
78 ubi_slInitList( &groupname_map_list );
82 if (!*groupname_map_file)
85 if(sys_stat(groupname_map_file, &st) != 0) {
86 DEBUG(0, ("load_groupname_map: Unable to stat file %s. Error was %s\n",
87 groupname_map_file, strerror(errno) ));
92 * Check if file has changed.
94 if( st.st_mtime <= groupmap_file_last_modified)
97 groupmap_file_last_modified = st.st_mtime;
103 fp = fopen(groupname_map_file,"r");
105 DEBUG(0,("load_groupname_map: can't open groupname map %s. Error was %s\n",
106 groupname_map_file, strerror(errno)));
111 * Throw away any previous list.
113 delete_groupname_map_list();
115 DEBUG(4,("load_groupname_map: Scanning groupname map %s\n",groupname_map_file));
117 while((s=fgets_slash(buf,sizeof(buf),fp))!=NULL) {
119 pstring windows_name;
123 DEBUG(10,("load_groupname_map: Read line |%s|\n", s));
125 if (!*s || strchr("#;",*s))
128 if(!next_token(&s,unixname, "\t\n\r=", sizeof(unixname)))
131 if(!next_token(&s,windows_name, "\t\n\r=", sizeof(windows_name)))
134 trim_string(unixname, " ", " ");
135 trim_string(windows_name, " ", " ");
143 DEBUG(5,("load_groupname_map: unixname = %s, windowsname = %s.\n",
144 unixname, windows_name));
147 * Attempt to get the unix gid_t for this name.
150 if((gptr = (struct group *)getgrnam(unixname)) == NULL) {
151 DEBUG(0,("load_groupname_map: getgrnam for group %s failed.\
152 Error was %s.\n", unixname, strerror(errno) ));
157 * Now map to an NT SID.
160 if(!lookup_wellknown_sid_from_name(windows_name, &tmp_sid)) {
162 * It's not a well known name, convert the UNIX gid_t
163 * to a rid within this domain SID.
165 tmp_sid = global_machine_sid;
166 tmp_sid.sub_auths[tmp_sid.num_auths++] =
167 pdb_gid_to_group_rid((gid_t)gptr->gr_gid);
171 * Create the list entry and add it onto the list.
174 if((new_ep = (groupname_map_entry *)malloc( sizeof(groupname_map_entry) ))== NULL) {
175 DEBUG(0,("load_groupname_map: malloc fail for groupname_map_entry.\n"));
180 new_ep->unix_gid = gptr->gr_gid;
181 new_ep->windows_sid = tmp_sid;
182 new_ep->windows_name = strdup( windows_name );
183 new_ep->unix_name = strdup( unixname );
185 if(new_ep->windows_name == NULL || new_ep->unix_name == NULL) {
186 DEBUG(0,("load_groupname_map: malloc fail for names in groupname_map_entry.\n"));
188 if(new_ep->windows_name != NULL)
189 free(new_ep->windows_name);
190 if(new_ep->unix_name != NULL)
191 free(new_ep->unix_name);
192 free((char *)new_ep);
195 memset((char *)&new_ep->next, '\0', sizeof(new_ep->next) );
197 ubi_slAddHead( &groupname_map_list, (ubi_slNode *)new_ep);
200 DEBUG(10,("load_groupname_map: Added %ld entries to groupname map.\n",
201 ubi_slCount(&groupname_map_list)));
206 /***********************************************************
207 Lookup a SID entry by gid_t.
208 ************************************************************/
210 void map_gid_to_sid( gid_t gid, DOM_SID *psid)
212 groupname_map_entry *gmep;
215 * Initialize and load if not already loaded.
217 load_groupname_map();
219 for( gmep = (groupname_map_entry *)ubi_slFirst( &groupname_map_list);
220 gmep; gmep = (groupname_map_entry *)ubi_slNext( gmep )) {
222 if( gmep->unix_gid == gid) {
223 *psid = gmep->windows_sid;
224 DEBUG(7,("map_gid_to_sid: Mapping unix group %s to windows group %s.\n",
225 gmep->unix_name, gmep->windows_name ));
231 * If there's no map, convert the UNIX gid_t
232 * to a rid within this domain SID.
234 *psid = global_machine_sid;
235 psid->sub_auths[psid->num_auths++] = pdb_gid_to_group_rid(gid);