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diff --git a/lib/util/substitute.h b/lib/util/substitute.h
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+/*
+ Unix SMB/CIFS implementation.
+ Samba utility functions
+
+ Copyright (C) Andrew Tridgell 1992-2001
+ Copyright (C) Simo Sorce 2001-2002
+ Copyright (C) Martin Pool 2003
+ Copyright (C) James Peach 2005
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _SAMBA_SUBSTITUTE_H_
+#define _SAMBA_SUBSTITUTE_H_
+
+#include <talloc.h>
+
+/**
+ Substitute a string for a pattern in another string. Make sure there is
+ enough room!
+
+ This routine looks for pattern in s and replaces it with
+ insert. It may do multiple replacements.
+
+ Any of " ; ' $ or ` in the insert string are replaced with _
+ if len==0 then the string cannot be extended. This is different from the old
+ use of len==0 which was for no length checks to be done.
+**/
+void string_sub(char *s,const char *pattern, const char *insert, size_t len);
+
+/**
+ Similar to string_sub() but allows for any character to be substituted.
+ Use with caution!
+ if len==0 then the string cannot be extended. This is different from the old
+ use of len==0 which was for no length checks to be done.
+**/
+void all_string_sub(char *s,const char *pattern,const char *insert, size_t len);
+
+char *talloc_string_sub2(TALLOC_CTX *mem_ctx, const char *src,
+ const char *pattern,
+ const char *insert,
+ bool remove_unsafe_characters,
+ bool replace_once,
+ bool allow_trailing_dollar);
+char *talloc_string_sub(TALLOC_CTX *mem_ctx,
+ const char *src,
+ const char *pattern,
+ const char *insert);
+char *talloc_all_string_sub(TALLOC_CTX *ctx,
+ const char *src,
+ const char *pattern,
+ const char *insert);
+#endif /* _SAMBA_SUBSTITUTE_H_ */