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.

NAME

       strcat — 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 ALSO

       strncat()

       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 Electrical 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.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                                   2013                                        STRCAT(3POSIX)