s3: in sys_popen(), validate input before opening the pipe.
[kai/samba.git] / source3 / lib / util_names.c
1 /*
2    Unix SMB/CIFS implementation.
3    Samba utility functions
4    Copyright (C) Andrew Tridgell 1992-1998
5    Copyright (C) Jeremy Allison 2001-2007
6    Copyright (C) Simo Sorce 2001
7    Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
8    Copyright (C) James Peach 2006
9    Copyright (C) Andrew Bartlett 2010-2011
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
27 /***********************************************************************
28  Definitions for all names.
29 ***********************************************************************/
30
31 static int smb_num_netbios_names;
32 static char **smb_my_netbios_names;
33
34 static void free_netbios_names_array(void)
35 {
36         int i;
37
38         for (i = 0; i < smb_num_netbios_names; i++)
39                 SAFE_FREE(smb_my_netbios_names[i]);
40
41         SAFE_FREE(smb_my_netbios_names);
42         smb_num_netbios_names = 0;
43 }
44
45 static bool allocate_my_netbios_names_array(size_t number)
46 {
47         free_netbios_names_array();
48
49         smb_num_netbios_names = number + 1;
50         smb_my_netbios_names = SMB_MALLOC_ARRAY( char *, smb_num_netbios_names );
51
52         if (!smb_my_netbios_names)
53                 return False;
54
55         memset(smb_my_netbios_names, '\0', sizeof(char *) * smb_num_netbios_names);
56         return True;
57 }
58
59 static bool set_my_netbios_names(const char *name, int i)
60 {
61         SAFE_FREE(smb_my_netbios_names[i]);
62
63         smb_my_netbios_names[i] = SMB_STRDUP(name);
64         if (!smb_my_netbios_names[i])
65                 return False;
66         return strupper_m(smb_my_netbios_names[i]);
67 }
68
69 /***********************************************************************
70  Free memory allocated to global objects
71 ***********************************************************************/
72
73 void gfree_names(void)
74 {
75         free_netbios_names_array();
76         free_local_machine_name();
77 }
78
79 const char *my_netbios_names(int i)
80 {
81         return smb_my_netbios_names[i];
82 }
83
84 bool set_netbios_aliases(const char **str_array)
85 {
86         size_t namecount;
87
88         /* Work out the max number of netbios aliases that we have */
89         for( namecount=0; str_array && (str_array[namecount] != NULL); namecount++ )
90                 ;
91
92         if ( lp_netbios_name() && *lp_netbios_name())
93                 namecount++;
94
95         /* Allocate space for the netbios aliases */
96         if (!allocate_my_netbios_names_array(namecount))
97                 return False;
98
99         /* Use the global_myname string first */
100         namecount=0;
101         if ( lp_netbios_name() && *lp_netbios_name()) {
102                 set_my_netbios_names( lp_netbios_name(), namecount );
103                 namecount++;
104         }
105
106         if (str_array) {
107                 size_t i;
108                 for ( i = 0; str_array[i] != NULL; i++) {
109                         size_t n;
110                         bool duplicate = False;
111
112                         /* Look for duplicates */
113                         for( n=0; n<namecount; n++ ) {
114                                 if( strequal( str_array[i], my_netbios_names(n) ) ) {
115                                         duplicate = True;
116                                         break;
117                                 }
118                         }
119                         if (!duplicate) {
120                                 if (!set_my_netbios_names(str_array[i], namecount))
121                                         return False;
122                                 namecount++;
123                         }
124                 }
125         }
126         return True;
127 }
128
129 /****************************************************************************
130   Common name initialization code.
131 ****************************************************************************/
132
133 bool init_names(void)
134 {
135         int n;
136
137         if (!set_netbios_aliases(lp_netbios_aliases())) {
138                 DEBUG( 0, ( "init_names: malloc fail.\n" ) );
139                 return False;
140         }
141
142         set_local_machine_name(lp_netbios_name(),false);
143
144         DEBUG( 5, ("Netbios name list:-\n") );
145         for( n=0; my_netbios_names(n); n++ ) {
146                 DEBUGADD( 5, ("my_netbios_names[%d]=\"%s\"\n",
147                                         n, my_netbios_names(n) ) );
148         }
149
150         return( True );
151 }
152
153 /******************************************************************
154  get the default domain/netbios name to be used when dealing
155  with our passdb list of accounts
156 ******************************************************************/
157
158 const char *get_global_sam_name(void)
159 {
160         if (IS_DC) {
161                 return lp_workgroup();
162         }
163         return lp_netbios_name();
164 }
165