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-'\" t
-.\" Copyright 2022 Alejandro Colomar <alx@kernel.org>
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.TH strncat 3 (date) "Linux man-pages (unreleased)"
-.SH NAME
-strncat
-\-
-append non-null bytes from a source array to a string,
-and null-terminate the result
-.SH LIBRARY
-Standard C library
-.RI ( libc ", " \-lc )
-.SH SYNOPSIS
-.nf
-.B #include <string.h>
-.P
-.BI "char *strncat(char *restrict " dst ", const char " src "[restrict ." ssize ],
-.BI "              size_t " ssize );
-.fi
-.SH DESCRIPTION
-This function appends at most
-.I ssize
-non-null bytes from the array pointed to by
-.IR src ,
-followed by a null character,
-to the end of the string pointed to by
-.IR dst .
-.I dst
-must point to a string contained in a buffer that is large enough,
-that is, the buffer size must be at least
-.IR "strlen(dst) + strnlen(src, ssize) + 1" .
-.P
-An implementation of this function might be:
-.P
-.in +4n
-.EX
-char *
-strncat(char *restrict dst, const char *restrict src, size_t ssize)
-{
-    #define strnul(s)  (s + strlen(s))
-\&
-    stpcpy(mempcpy(strnul(dst), src, strnlen(src, ssize)), "");
-    return dst;
-}
-.EE
-.in
-.SH RETURN VALUE
-.BR strncat ()
-returns
-.IR dst .
-.SH ATTRIBUTES
-For an explanation of the terms used in this section, see
-.BR attributes (7).
-.TS
-allbox;
-lbx lb lb
-l l l.
-Interface	Attribute	Value
-T{
-.na
-.nh
-.BR strncat ()
-T}	Thread safety	MT-Safe
-.TE
-.SH STANDARDS
-C11, POSIX.1-2008.
-.SH HISTORY
-POSIX.1-2001, C89, SVr4, 4.3BSD.
-.SH CAVEATS
-The name of this function is confusing;
-it has no relation to
-.BR strncpy (3).
-.P
-If the destination buffer does not already contain a string,
-or is not large enough,
-the behavior is undefined.
-See
-.B _FORTIFY_SOURCE
-in
-.BR feature_test_macros (7).
-.SH BUGS
-This function can be very inefficient.
-Read about
-.UR https://www.joelonsoftware.com/\:2001/12/11/\:back\-to\-basics/
-Shlemiel the painter
-.UE .
-.SH EXAMPLES
-.\" SRC BEGIN (strncat.c)
-.EX
-#include <err.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-\&
-#define nitems(arr)  (sizeof((arr)) / sizeof((arr)[0]))
-\&
-int
-main(void)
-{
-    size_t  n;
-\&
-    // Null-padded fixed-size character sequences
-    char    pre[4] = "pre.";
-    char    new_post[50] = ".foo.bar";
-\&
-    // Strings
-    char    post[] = ".post";
-    char    src[] = "some_long_body.post";
-    char    *dest;
-\&
-    n = nitems(pre) + strlen(src) \- strlen(post) + nitems(new_post) + 1;
-    dest = malloc(sizeof(*dest) * n);
-    if (dest == NULL)
-        err(EXIT_FAILURE, "malloc()");
-\&
-    dest[0] = \[aq]\e0\[aq];  // There's no 'cpy' function to this 'cat'.
-    strncat(dest, pre, nitems(pre));
-    strncat(dest, src, strlen(src) \- strlen(post));
-    strncat(dest, new_post, nitems(new_post));
-\&
-    puts(dest);  // "pre.some_long_body.foo.bar"
-    free(dest);
-    exit(EXIT_SUCCESS);
-}
-.EE
-.\" SRC END
-.in
-.SH SEE ALSO
-.BR string (3),
-.BR string_copying (7)