2 Unix SMB/CIFS implementation.
3 Samba utility functions
5 Copyright (C) Andrew Tridgell 1992-2001
6 Copyright (C) Simo Sorce 2001-2002
7 Copyright (C) Martin Pool 2003
8 Copyright (C) James Peach 2005
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
28 * @brief Substitute utilities.
32 Substitute a string for a pattern in another string. Make sure there is
35 This routine looks for pattern in s and replaces it with
36 insert. It may do multiple replacements or just one.
38 Any of " ; ' $ or ` in the insert string are replaced with _
39 if len==0 then the string cannot be extended. This is different from the old
40 use of len==0 which was for no length checks to be done.
43 static void string_sub2(char *s,const char *pattern, const char *insert, size_t len,
44 bool remove_unsafe_characters, bool replace_once,
45 bool allow_trailing_dollar)
48 ssize_t ls, lp, li, i;
50 if (!insert || !pattern || !*pattern || !s)
53 ls = (ssize_t)strlen(s);
54 lp = (ssize_t)strlen(pattern);
55 li = (ssize_t)strlen(insert);
58 len = ls + 1; /* len is number of *bytes* */
60 while (lp <= ls && (p = strstr_m(s,pattern))) {
61 if (ls + (li-lp) >= len) {
62 DEBUG(0,("ERROR: string overflow by "
63 "%d in string_sub(%.50s, %d)\n",
64 (int)(ls + (li-lp) - len),
69 memmove(p+li,p+lp,strlen(p+lp)+1);
75 * (as in machine accounts) */
76 if (allow_trailing_dollar && (i == li - 1 )) {
87 if ( remove_unsafe_characters ) {
89 /* yes this break should be here
90 * since we want to fall throw if
91 * not replacing unsafe chars */
106 void string_sub_once(char *s, const char *pattern,
107 const char *insert, size_t len)
109 string_sub2( s, pattern, insert, len, true, true, false );
112 void string_sub(char *s,const char *pattern, const char *insert, size_t len)
114 string_sub2( s, pattern, insert, len, true, false, false );
118 * Talloc'ed version of string_sub
120 _PUBLIC_ char *string_sub_talloc(TALLOC_CTX *mem_ctx, const char *s,
121 const char *pattern, const char *insert)
125 size_t len, alloc_len;
127 if (insert == NULL || pattern == NULL || !*pattern || s == NULL)
130 /* determine length needed */
133 for (p = strstr(s, pattern); p != NULL;
134 p = strstr(p+strlen(pattern), pattern)) {
135 len += strlen(insert) - strlen(pattern);
138 alloc_len = MAX(len, strlen(s))+1;
139 ret = talloc_array(mem_ctx, char, alloc_len);
142 strncpy(ret, s, alloc_len);
143 string_sub(ret, pattern, insert, alloc_len);
145 ret = talloc_realloc(mem_ctx, ret, char, len+1);
149 SMB_ASSERT(ret[len] == '\0');
151 talloc_set_name_const(ret, ret);
157 Similar to string_sub() but allows for any character to be substituted.
159 if len==0 then the string cannot be extended. This is different from the old
160 use of len==0 which was for no length checks to be done.
163 _PUBLIC_ void all_string_sub(char *s,const char *pattern,const char *insert, size_t len)
168 if (!insert || !pattern || !s)
171 ls = (ssize_t)strlen(s);
172 lp = (ssize_t)strlen(pattern);
173 li = (ssize_t)strlen(insert);
179 len = ls + 1; /* len is number of *bytes* */
181 while (lp <= ls && (p = strstr_m(s,pattern))) {
182 if (ls + (li-lp) >= len) {
183 DEBUG(0,("ERROR: string overflow by "
184 "%d in all_string_sub(%.50s, %d)\n",
185 (int)(ls + (li-lp) - len),
190 memmove(p+li,p+lp,strlen(p+lp)+1);
192 memcpy(p, insert, li);