s3: Make is_executable() available in lib/
[Samba.git] / source3 / smbd / srvstr.c
blob69e12e28c5168ab27aafa0d781d28157b5322797
1 /*
2 Unix SMB/CIFS implementation.
3 server specific string routines
4 Copyright (C) Andrew Tridgell 2001
5 Copyright (C) Andrew Bartlett <abartlet@samba.org> 2003
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 3 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, see <http://www.gnu.org/licenses/>.
21 #include "includes.h"
22 #include "smbd/smbd.h"
23 #include "smbd/globals.h"
25 /* Make sure we can't write a string past the end of the buffer */
27 size_t srvstr_push_fn(const char *function, unsigned int line,
28 const char *base_ptr, uint16 smb_flags2, void *dest,
29 const char *src, int dest_len, int flags)
31 if (dest_len < 0) {
32 return 0;
35 /* 'normal' push into size-specified buffer */
36 return push_string_base(function, line, base_ptr, smb_flags2, dest, src,
37 dest_len, flags);
40 /*******************************************************************
41 Add a string to the end of a smb_buf, adjusting bcc and smb_len.
42 Return the bytes added
43 ********************************************************************/
45 ssize_t message_push_string(uint8 **outbuf, const char *str, int flags)
47 size_t buf_size = smb_len(*outbuf) + 4;
48 size_t grow_size;
49 size_t result;
50 uint8 *tmp;
53 * We need to over-allocate, now knowing what srvstr_push will
54 * actually use. This is very generous by incorporating potential
55 * padding, the terminating 0 and at most 4 chars per UTF-16 code
56 * point.
58 grow_size = (strlen(str) + 2) * 4;
60 if (!(tmp = TALLOC_REALLOC_ARRAY(NULL, *outbuf, uint8,
61 buf_size + grow_size))) {
62 DEBUG(0, ("talloc failed\n"));
63 return -1;
66 result = srvstr_push((char *)tmp, SVAL(tmp, smb_flg2),
67 tmp + buf_size, str, grow_size, flags);
69 if (result == (size_t)-1) {
70 DEBUG(0, ("srvstr_push failed\n"));
71 return -1;
73 set_message_bcc((char *)tmp, smb_buflen(tmp) + result);
75 *outbuf = tmp;
77 return result;