1.TH strcat 3 scc\-VERSION2.SH NAME3strcat - concatenate two strings4.SH SYNOPSIS5#include <string.h>67char *strcat(char *restrict s1, const char *restrict s2)8.SH DESCRIPTION9The10.BR strcat ()11function appends a copy of the null-terminated string at12.I s213to the end of the string at14.IR s1 ,15including its terminating null byte.16.PP17The first byte of18.I s219replaces the null terminator at the end of20.IR s1 .21.PP22Overlapping source and destination regions produce undefined behavior.23.SH RETURN VALUE24The25.BR strcat ()26function returns its first argument,27.IR s1 .28.SH STANDARDS29ISO/IEC 9899:1999 Section 7.21.3.1