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/>.
24 /*******************************************************************
25 Map a username from a dos name to a unix name by looking in the username
26 map. Note that this modifies the name in place.
27 This is the main function that should be called *once* on
28 any incoming or new username - in order to canonicalize the name.
29 This is being done to de-couple the case conversions from the user mapping
30 function. Previously, the map_username was being called
31 every time Get_Pwnam_alloc was called.
32 Returns True if username was changed, false otherwise.
33 ********************************************************************/
35 static char *last_from, *last_to;
37 static const char *get_last_from(void)
45 static const char *get_last_to(void)
53 static bool set_last_from_to(const char *from, const char *to)
55 char *orig_from = last_from;
56 char *orig_to = last_to;
58 last_from = SMB_STRDUP(from);
59 last_to = SMB_STRDUP(to);
64 if (!last_from || !last_to) {
72 bool map_username(fstring user)
75 char *mapfile = lp_username_map();
78 bool mapped_user = False;
79 char *cmd = lp_username_map_script();
84 if (strequal(user,get_last_to()))
87 if (strequal(user,get_last_from())) {
88 DEBUG(3,("Mapped user %s to %s\n",user,get_last_to()));
89 fstrcpy(user,get_last_to());
93 /* first try the username map script */
98 int numlines, ret, fd;
100 command = talloc_asprintf(talloc_tos(),
108 DEBUG(10,("Running [%s]\n", command));
109 ret = smbrun(command, &fd);
110 DEBUGADD(10,("returned [%d]\n", ret));
119 qlines = fd_lines_load(fd, &numlines,0);
120 DEBUGADD(10,("Lines returned = [%d]\n", numlines));
123 /* should be either no lines or a single line with the mapped username */
125 if (numlines && qlines) {
126 DEBUG(3,("Mapped user %s to %s\n", user, qlines[0] ));
127 fstrcpy( user, qlines[0] );
130 file_lines_free(qlines);
132 return numlines != 0;
135 /* ok. let's try the mapfile */
139 f = x_fopen(mapfile,O_RDONLY, 0);
141 DEBUG(0,("can't open username map %s. Error %s\n",mapfile, strerror(errno) ));
145 DEBUG(4,("Scanning username map %s\n",mapfile));
147 while((s=fgets_slash(buf,sizeof(buf),f))!=NULL) {
149 char *dosname = strchr_m(unixname,'=');
151 bool return_if_mapped = False;
158 while (isspace((int)*unixname))
161 if ('!' == *unixname) {
162 return_if_mapped = True;
164 while (*unixname && isspace((int)*unixname))
168 if (!*unixname || strchr_m("#;",*unixname))
172 int l = strlen(unixname);
173 while (l && isspace((int)unixname[l-1])) {
179 /* skip lines like 'user = ' */
181 dosuserlist = str_list_make(dosname, NULL);
183 DEBUG(0,("Bad username map entry. Unable to build user list. Ignoring.\n"));
187 if (strchr_m(dosname,'*') ||
188 user_in_list(user, (const char **)dosuserlist)) {
189 DEBUG(3,("Mapped user %s to %s\n",user,unixname));
192 set_last_from_to(user, unixname);
193 fstrcpy( user, unixname );
195 if ( return_if_mapped ) {
196 str_list_free (&dosuserlist);
202 str_list_free (&dosuserlist);
208 * Setup the last_from and last_to as an optimization so
209 * that we don't scan the file again for the same user.
212 set_last_from_to(user, user);