STRCAT(3P) POSIX Programmer's Manual STRCAT(3P)PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the corresponding
Linux manual page for details of Linux behavior), or the interface may
not be implemented on Linux.
NAMEstrcat — concatenate two strings
SYNOPSIS
#include <string.h>
char *strcat(char *restrict s1, const char *restrict s2);
DESCRIPTION
The functionality described on this reference page is aligned with the
ISO C standard. Any conflict between the requirements described here
and the ISO C standard is unintentional. This volume of POSIX.1‐2008
defers to the ISO C standard.
The strcat() function shall append a copy of the string pointed to by
s2 (including the terminating NUL character) to the end of the string
pointed to by s1. The initial byte of s2 overwrites the NUL character
at the end of s1. If copying takes place between objects that overlap,
the behavior is undefined.
RETURN VALUE
The strcat() function shall return s1; no return value is reserved to
indicate an error.
ERRORS
No errors are defined.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
This version is aligned with the ISO C standard; this does not affect
compatibility with XPG3 applications. Reliable error detection by this
function was never guaranteed.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSOstrncat()
The Base Definitions volume of POSIX.1‐2008, <string.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
cal and Electronics Engineers, Inc and The Open Group. (This is
POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online
at http://www.unix.org/online.html .
Any typographical or formatting errors that appear in this page are
most likely to have been introduced during the conversion of the source
files to man page format. To report such errors, see https://www.ker‐
nel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2013 STRCAT(3P)
