/*
   =============================================================================
	strcat.c -- concatenate strings
	Version 1 -- 1987-06-12

	Concatenate s2 onto the end of s1.  S1's space must be large enough.
	Return s1.
   =============================================================================
*/

char *
strcat(s1, s2)
register char *s1, *s2;
{
        register char *os1;

        os1 = s1;

        while(*s1++)
                ;

        --s1;

        while(*s1++ = *s2++)
                ;

        return(os1);
}