source: buchla-68k/libsm/strncat.c@ 0580615

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

        Concatenate s2 on the end of s1.  S1's space must be large enough.
        At most n characters are moved.
        Return s1.
   =============================================================================
*/

char *strncat(char *s1, char *s2, int n)
{
        register char *os1;

        os1 = s1;

        while(*s1++)
                ;

        --s1;

        while(*s1++ = *s2++)
                if(--n < 0) {

                        *--s1 = '\0';
                        break;
                }

        return(os1);
}