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-.\" Copyright (c) 1990, 1991, 1993
-.\"	The Regents of the University of California.  All rights reserved.
-.\"
-.\" This code is derived from software contributed to Berkeley by
-.\" Chris Torek and the American National Standards Committee X3,
-.\" on Information Processing Systems.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. All advertising materials mentioning features or use of this software
-.\"    must display the following acknowledgement:
-.\"	This product includes software developed by the University of
-.\"	California, Berkeley and its contributors.
-.\" 4. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"     @(#)strcat.3	8.1 (Berkeley) 6/4/93
-.\" $FreeBSD: src/lib/libc/string/strcat.3,v 1.13 2002/09/06 11:24:06 tjr Exp $
-.\"
-.Dd June 4, 1993
-.Dt STRCAT 3
-.Os
-.Sh NAME
-.Nm strcat
-.Nd concatenate strings
-.Sh LIBRARY
-.Lb libc
-.Sh SYNOPSIS
-.In string.h
-.Ft char *
-.Fn strcat "char * restrict s" "const char * restrict append"
-.Ft char *
-.Fn strncat "char * restrict s" "const char * restrict append" "size_t count"
-.Sh DESCRIPTION
-The
-.Fn strcat
-and
-.Fn strncat
-functions
-append a copy of the null-terminated string
-.Fa append
-to the end of the null-terminated string
-.Fa s ,
-then add a terminating
-.Ql \e0 .
-The string
-.Fa s
-must have sufficient space to hold the result.
-.Pp
-The
-.Fn strncat
-function
-appends not more than
-.Fa count
-characters from
-.Fa append ,
-and then adds a terminating
-.Ql \e0 .
-.Sh RETURN VALUES
-The
-.Fn strcat
-and
-.Fn strncat
-functions
-return the pointer
-.Fa s .
-.Sh SECURITY CONSIDERATIONS
-The
-.Fn strcat
-function is easily misused in a manner
-which enables malicious users to arbitrarily change
-a running program's functionality through a buffer overflow attack.
-(See
-the FSA.)
-.Pp
-Avoid using
-.Fn strcat .
-Instead, use
-.Fn strncat
-or
-.Fn strlcat
-and ensure that no more characters are copied to the destination buffer
-than it can hold.
-.Pp
-Note that
-.Fn strncat
-can also be problematic.
-It may be a security concern for a string to be truncated at all.
-Since the truncated string will not be as long as the original,
-it may refer to a completely different resource
-and usage of the truncated resource
-could result in very incorrect behavior.
-Example:
-.Bd -literal
-void
-foo(const char *arbitrary_string)
-{
-	char onstack[8];
-
-#if defined(BAD)
-	/*
-	 * This first strcat is bad behavior.  Do not use strcat!
-	 */
-	(void)strcat(onstack, arbitrary_string);	/* BAD! */
-#elif defined(BETTER)
-	/*
-	 * The following two lines demonstrate better use of
-	 * strncat().
-	 */
-	(void)strncat(onstack, arbitrary_string,
-	    sizeof(onstack) - strlen(onstack) - 1);
-#elif defined(BEST)
-	/*
-	 * These lines are even more robust due to testing for
-	 * truncation.
-	 */
-	if (strlen(arbitrary_string) + 1 >
-	    sizeof(onstack) - strlen(onstack))
-		err(1, "onstack would be truncated");
-	(void)strncat(onstack, arbitrary_string,
-	    sizeof(onstack) - strlen(onstack) - 1);
-#endif
-}
-.Ed
-.Sh SEE ALSO
-.Xr bcopy 3 ,
-.Xr memccpy 3 ,
-.Xr memcpy 3 ,
-.Xr memmove 3 ,
-.Xr strcpy 3 ,
-.Xr strlcat 3 ,
-.Xr strlcpy 3
-.Rs
-.%T "The FreeBSD Security Architecture"
-.Re
-(See
-.Pa "/usr/share/doc/{to be decided}" . )
-.Sh STANDARDS
-The
-.Fn strcat
-and
-.Fn strncat
-functions
-conform to
-.St -isoC .