2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 1992-1998
5 Copyright (C) Jeremy Allison 1997-2001.
6 Copyright (C) Volker Lendecke 2006
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 #include "smbd/globals.h"
25 /*******************************************************************
26 Map a username from a dos name to a unix name by looking in the username
27 map. Note that this modifies the name in place.
28 This is the main function that should be called *once* on
29 any incoming or new username - in order to canonicalize the name.
30 This is being done to de-couple the case conversions from the user mapping
31 function. Previously, the map_username was being called
32 every time Get_Pwnam_alloc was called.
33 Returns True if username was changed, false otherwise.
34 ********************************************************************/
36 static const char *get_last_from(void)
44 static const char *get_last_to(void)
52 static bool set_last_from_to(const char *from, const char *to)
54 char *orig_from = last_from;
55 char *orig_to = last_to;
57 last_from = SMB_STRDUP(from);
58 last_to = SMB_STRDUP(to);
63 if (!last_from || !last_to) {
71 bool map_username(struct smbd_server_connection *sconn, fstring user)
74 char *mapfile = lp_username_map();
77 bool mapped_user = False;
78 char *cmd = lp_username_map_script();
83 if (strequal(user,get_last_to()))
86 if (strequal(user,get_last_from())) {
87 DEBUG(3,("Mapped user %s to %s\n",user,get_last_to()));
88 fstrcpy(user,get_last_to());
92 /* first try the username map script */
97 int numlines, ret, fd;
99 command = talloc_asprintf(talloc_tos(),
107 DEBUG(10,("Running [%s]\n", command));
108 ret = smbrun(command, &fd);
109 DEBUGADD(10,("returned [%d]\n", ret));
111 TALLOC_FREE(command);
120 qlines = fd_lines_load(fd, &numlines, 0, talloc_tos());
121 DEBUGADD(10,("Lines returned = [%d]\n", numlines));
124 /* should be either no lines or a single line with the mapped username */
126 if (numlines && qlines) {
127 DEBUG(3,("Mapped user %s to %s\n", user, qlines[0] ));
128 set_last_from_to(user, qlines[0]);
129 fstrcpy( user, qlines[0] );
134 return numlines != 0;
137 /* ok. let's try the mapfile */
141 f = x_fopen(mapfile,O_RDONLY, 0);
143 DEBUG(0,("can't open username map %s. Error %s\n",mapfile, strerror(errno) ));
147 DEBUG(4,("Scanning username map %s\n",mapfile));
149 while((s=fgets_slash(buf,sizeof(buf),f))!=NULL) {
151 char *dosname = strchr_m(unixname,'=');
153 bool return_if_mapped = False;
160 while (isspace((int)*unixname))
163 if ('!' == *unixname) {
164 return_if_mapped = True;
166 while (isspace((int)*unixname))
170 if (!*unixname || strchr_m("#;",*unixname))
174 int l = strlen(unixname);
175 while (l && isspace((int)unixname[l-1])) {
181 /* skip lines like 'user = ' */
183 dosuserlist = str_list_make_v3(talloc_tos(), dosname, NULL);
185 DEBUG(0,("Bad username map entry. Unable to build user list. Ignoring.\n"));
189 if (strchr_m(dosname,'*') ||
190 user_in_list(sconn, user, (const char **)dosuserlist)) {
191 DEBUG(3,("Mapped user %s to %s\n",user,unixname));
194 set_last_from_to(user, unixname);
195 fstrcpy( user, unixname );
197 if ( return_if_mapped ) {
198 TALLOC_FREE(dosuserlist);
204 TALLOC_FREE(dosuserlist);
210 * Setup the last_from and last_to as an optimization so
211 * that we don't scan the file again for the same user.
214 set_last_from_to(user, user);