diff -c orig/ls.c ./ls.c
*** orig/ls.c	Wed Aug 12 23:21:51 2015
--- ./ls.c	Sat May 27 13:13:09 2023
***************
*** 113,118 ****
--- 113,119 ----
  static int f_listdir;		/* list actual directory, not contents */
  static int f_listdot;		/* list files beginning with . */
         int f_longform;		/* long listing format */
+        int f_nsec;			/* time with nsec */
  static int f_noautodot;		/* do not automatically enable -A for root */
  static int f_nofollow;		/* don't follow symbolic link arguments */
         int f_nonprint;		/* show unprintables as ? */
***************
*** 185,190 ****
--- 186,197 ----
  	fts_options = FTS_PHYSICAL;
  	if (getenv("LS_SAMESORT"))
  		f_samesort = 1;
+ 
+  f_listdot = 1;									/* force -A */
+  f_longform = 1; f_singlecol = 0; f_stream = 0;	/* force -l */
+  f_type = 1; f_slash = 0;						/* force -F */
+  f_timeformat = "%Y-%m%d %H:%M.%S";			/* force -D "..." */
+ 
  	while ((ch = getopt(argc, argv,
  	    "1ABCD:FGHILPRSTUWXZabcdfghiklmnopqrstuwxy,")) != -1) {
  		switch (ch) {
***************
*** 201,206 ****
--- 208,216 ----
  			f_sortacross = f_longform = f_singlecol = 0;
  			break;
  		case 'l':
+ 			if(f_longform == 1) {
+ 				f_nsec = 1;			/* double 'l' specifies nsec display */
+ 			}
  			f_longform = 1;
  			f_singlecol = 0;
  			f_stream = 0;
diff -c orig/ls.h ./ls.h
*** orig/ls.h	Wed Aug 12 23:21:51 2015
--- ./ls.h	Fri May 26 08:59:25 2023
***************
*** 46,51 ****
--- 46,52 ----
  extern int f_label;		/* show MAC label */
  extern int f_inode;		/* print inode */
  extern int f_longform;		/* long listing format */
+ extern int f_nsec;			/* time with nsec */
  extern int f_octal;		/* print unprintables in octal */
  extern int f_octal_escape;	/* like f_octal but use C escapes if possible */
  extern int f_nonprint;		/* show unprintables as ? */
diff -c orig/print.c ./print.c
*** orig/print.c	Wed Aug 12 23:21:51 2015
--- ./print.c	Sat May 27 13:12:39 2023
***************
*** 65,71 ****
  static int	printaname(const FTSENT *, u_long, u_long);
  static void	printdev(size_t, dev_t);
  static void	printlink(const FTSENT *);
! static void	printtime(time_t);
  static int	printtype(u_int);
  static void	printsize(size_t, off_t);
  #ifdef COLORLS
--- 65,72 ----
  static int	printaname(const FTSENT *, u_long, u_long);
  static void	printdev(size_t, dev_t);
  static void	printlink(const FTSENT *);
! //static void	printtime(time_t);
! static void printtime(time_t ftime, long nsec);
  static int	printtype(u_int);
  static void	printsize(size_t, off_t);
  #ifdef COLORLS
***************
*** 172,184 ****
  		else
  			printsize(dp->s_size, sp->st_size);
  		if (f_accesstime)
! 			printtime(sp->st_atime);
  		else if (f_birthtime)
! 			printtime(sp->st_birthtime);
  		else if (f_statustime)
! 			printtime(sp->st_ctime);
  		else
! 			printtime(sp->st_mtime);
  #ifdef COLORLS
  		if (f_color)
  			color_printed = colortype(sp->st_mode);
--- 173,185 ----
  		else
  			printsize(dp->s_size, sp->st_size);
  		if (f_accesstime)
! 			printtime(sp->st_atime, sp->st_atim.tv_nsec);
  		else if (f_birthtime)
! 			printtime(sp->st_birthtime, sp->st_birthtim.tv_nsec);
  		else if (f_statustime)
! 			printtime(sp->st_ctime, sp->st_ctim.tv_nsec);
  		else
! 			printtime(sp->st_mtime, sp->st_mtim.tv_nsec);
  #ifdef COLORLS
  		if (f_color)
  			color_printed = colortype(sp->st_mode);
***************
*** 359,365 ****
  }
  
  static void
! printtime(time_t ftime)
  {
  	char longstring[80];
  	static time_t now = 0;
--- 360,366 ----
  }
  
  static void
! printtime(time_t ftime, long nsec)
  {
  	char longstring[80];
  	static time_t now = 0;
***************
*** 385,390 ****
--- 386,393 ----
  		format = d_first ? "%e %b  %Y" : "%b %e  %Y";
  	strftime(longstring, sizeof(longstring), format, localtime(&ftime));
  	fputs(longstring, stdout);
+ 	if (f_nsec)
+ 		(void)printf(",%09ld", nsec);
  	fputc(' ', stdout);
  }