source: buchla-68k/orig/CLIBRARY/STRNCPY.C@ 6888aa2

/*
   =============================================================================
        strncpy.c -- copy string of n bytes
        Version 1 -- 1987-06-12

        Copy s2 to s1, truncating or null-padding to always copy n bytes
        return s1
   =============================================================================
*/

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

        while (--n >= 0)
                if ((*s1++ = *s2++) == '\0')
                        while (--n >= 0)
                                *s1++ = '\0';

        return (os1);
}