     1                                  ; ****************************************************************************
     2                                  ; cp386.s (cp1.s) - by Erdogan Tan - 20/04/2022
     3                                  ; ----------------------------------------------------------------------------
     4                                  ; Retro UNIX 386 v1 - copy -- cp oldfile newfile
     5                                  ;
     6                                  ; [ Last Modification: 24/04/2022 ]
     7                                  ;
     8                                  ; Derived from (original) UNIX v7 (& v7 x86) 'cp.c' source Code
     9                                  ; Ref:
    10                                  ; www.tuhs.org (https://minnie.tuhs.org)
    11                                  ; v7.tar.gz
    12                                  ; ****************************************************************************
    13                                  ; [ v7.tar - usr/src/cmd/cp.c (archive date: 10-1-1979) ]
    14                                  ;
    15                                  ; Assembler: NASM v2.15
    16                                  ; ((nasm cp1.s -l cp1.txt -o cp1 -Z error.txt))
    17                                  ;
    18                                  ; cp1.s - 21/04/2022 - Retro UNIX 386 v1.2 (modified unix v7 inode)
    19                                  ; cp0.s - 21/04/2022 - Retro UNIX 386 v1 & v1.1
    20                                  ; cp8086.s - 22/04/2022 - Retro UNIX 8086 v1 (16 bit 'cp0.s')
    21                                  
    22                                  ; 12/01/2022 (Retro UNIX 386 v1.2)
    23                                  ; 13/10/2015
    24                                  
    25                                  ; UNIX v1 system calls
    26                                  _rele 	equ 0
    27                                  _exit 	equ 1
    28                                  _fork 	equ 2
    29                                  _read 	equ 3
    30                                  _write	equ 4
    31                                  _open	equ 5
    32                                  _close 	equ 6
    33                                  _wait 	equ 7
    34                                  _creat 	equ 8
    35                                  _link 	equ 9
    36                                  _unlink	equ 10
    37                                  _exec	equ 11
    38                                  _chdir	equ 12
    39                                  _time 	equ 13
    40                                  _mkdir 	equ 14
    41                                  _chmod	equ 15
    42                                  _chown	equ 16
    43                                  _break	equ 17
    44                                  _stat	equ 18
    45                                  _seek	equ 19
    46                                  _tell 	equ 20
    47                                  _mount	equ 21
    48                                  _umount	equ 22
    49                                  _setuid	equ 23
    50                                  _getuid	equ 24
    51                                  _stime	equ 25
    52                                  _quit	equ 26	
    53                                  _intr	equ 27
    54                                  _fstat	equ 28
    55                                  _emt 	equ 29
    56                                  _mdate 	equ 30
    57                                  _stty 	equ 31
    58                                  _gtty	equ 32
    59                                  _ilgins	equ 33
    60                                  _sleep	equ 34 ; Retro UNIX 8086 v1 feature only !
    61                                  _msg    equ 35 ; Retro UNIX 386 v1 feature only !
    62                                  _geterr	equ 36 ; Retro UNIX 386 v1 feature only !
    63                                  ; 12/01/2022 - Retro UNIX 386 v1.2
    64                                  ; Retro UNIX 386 v2 system calls
    65                                  _setgid	equ 37
    66                                  _getgid	equ 38
    67                                  _sysver	equ 39 ; (get) Retro Unix 386 version
    68                                  
    69                                  ;;;
    70                                  ESCKey equ 1Bh
    71                                  EnterKey equ 0Dh
    72                                  
    73                                  %macro sys 1-4
    74                                      ; 03/09/2015	
    75                                      ; 13/04/2015
    76                                      ; Retro UNIX 386 v1 system call.		
    77                                      %if %0 >= 2   
    78                                          mov ebx, %2
    79                                          %if %0 >= 3    
    80                                              mov ecx, %3
    81                                              ;%if %0 = 4
    82                                              %if	%0 >= 4 ; 11/03/2022
    83                                  		mov edx, %4   
    84                                              %endif
    85                                          %endif
    86                                      %endif
    87                                      mov eax, %1
    88                                      int 30h	   
    89                                  %endmacro
    90                                  
    91                                  ; Retro UNIX 386 v1 system call format:
    92                                  ; sys systemcall (eax) <arg1 (ebx)>, <arg2 (ecx)>, <arg3 (edx)>
    93                                  
    94                                  ; 11/03/2022
    95                                  ; Note: Above 'sys' macro has limitation about register positions;
    96                                  ;	ebx, ecx, edx registers must not be used after their
    97                                  ;	positions in sys macro.
    98                                  ; for example:
    99                                  ;	'sys _write, 1, msg, ecx' is defective, because
   100                                  ;	 ecx will be used/assigned before edx in 'sys' macro.
   101                                  ; correct order may be:
   102                                  ;	'sys _write, 1, msg, eax ; (eax = byte count)
   103                                  
   104                                  struc stat
   105                                  	; Note: This is for Retro UNIX v1.2 'sysstat' output !!!
   106                                  	; (66 bytes)
   107 00000000 ????                    	.inode:  resw 1	
   108 00000002 ????                    	.mode:	 resw 1
   109 00000004 ????                    	.nlinks: resw 1 
   110 00000006 ????                    	.uid:	 resw 1
   111 00000008 ??                      	.gid:	 resb 1
   112 00000009 ??                      	.size_h: resb 1
   113 0000000A ????????                	.size:	 resd 1
   114 0000000E <res 28h>               	.dskptr: resd 10
   115 00000036 ????????                	.atime:	 resd 1
   116 0000003A ????????                	.mtime:	 resd 1
   117 0000003E ????????                	.ctime:  resd 1
   118                                  	.strucsize:
   119                                  endstruc   
   120                                  
   121                                  ;	; 20/04/2022
   122                                  ;struc stat
   123                                  ;	; Note: Retro UNIX v2 'sysstat' output DRAFT !!!
   124                                  ;	; (72 bytes)
   125                                  ;	.idev:	 resb 1
   126                                  ;	.rsvd:	 resb 3
   127                                  ;	.inum:   resd 1	
   128                                  ;	.mode:	 resw 1
   129                                  ;	.nlinks: resw 1 
   130                                  ;	.uid:	 resw 1
   131                                  ;	.gid:	 resb 1
   132                                  ;	.size_h: resb 1
   133                                  ;	.size:	 resd 1
   134                                  ;	.dskptr: resd 10
   135                                  ;	.atime:	 resd 1
   136                                  ;	.mtime:	 resd 1
   137                                  ;	.ctime:  resd 1
   138                                  ;	.strucsize:
   139                                  ;endstruc 
   140                                  
   141                                  ;S_IFMT   equ 0F000h ; /* type of file */
   142                                  ;S_IFDIR  equ 04000h ; /* directory */
   143                                  ;S_IFCHR  equ 02000h ; /* character special */
   144                                  ;S_IFBLK  equ 06000h ; /* block special */
   145                                  ;S_IFREG  equ 08000h ; /* regular */
   146                                  ;S_ISUID  equ 00800h ; /* set user id on execution */
   147                                  ;S_ISGID  equ 00400h ; /* set group id on execution */
   148                                  ;S_IREAD  equ 00100h ; /* read permission, owner */
   149                                  ;S_IWRITE equ 00080h ; /* write permission, owner */
   150                                  ;S_IEXEC  equ 00040h ; /* execute/search permission, owner */
   151                                  
   152                                  S_IFMT   equ 0F0h ; /* type of file */
   153                                  S_IFDIR  equ 040h ; /* directory */
   154                                  S_IFCHR  equ 020h ; /* character special */
   155                                  S_IFBLK  equ 060h ; /* block special */
   156                                  S_IFREG  equ 080h ; /* regular */
   157                                  S_ISUID  equ 008h ; /* set user id on execution */
   158                                  S_ISGID  equ 004h ; /* set group id on execution */
   159                                  S_IREAD  equ 001h ; /* read permission, owner */
   160                                  S_IWRITE equ 080h ; /* write permission, owner */
   161                                  S_IEXEC  equ 040h ; /* execute/search permission, owner */
   162                                  
   163                                  BSIZE equ 512
   164                                  
   165                                  ;-----------------------------------------------------------------
   166                                  ;  text - code
   167                                  ;-----------------------------------------------------------------
   168                                  
   169                                  [BITS 32] ; 32-bit intructions (for 80386 protected mode)
   170                                  
   171                                  [ORG 0] 
   172                                  
   173                                  START_CODE:
   174                                  	; 20/04/2022
   175                                  	; main(argc, argv)
   176                                  
   177 00000000 89E6                    	mov	esi, esp		
   178 00000002 89F7                    	mov	edi, esi
   179 00000004 AD                      	lodsd		; number of arguments
   180                                  	;mov	edi, esi			
   181                                  	;mov	[argc], eax
   182 00000005 A2[69020000]            	mov	[argc], al
   183                                  
   184                                  	;if (argc < 3) 
   185                                  	;   goto usage;
   186                                  
   187                                  	;cmp	eax, 3
   188 0000000A 3C03                    	cmp	al, 3
   189 0000000C 7337                    	jnb	short cp_0  ; if (argc > 3) {
   190 0000000E FEC8                    	dec	al	; 21/04/2022
   191 00000010 7516                    	jnz	short cp_usage
   192                                  	sys	_msg, program_msg, 255, 0Fh
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78 00000012 BB[6A020000]        <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80 00000017 B9FF000000          <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83 0000001C BA0F000000          <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 00000021 B823000000          <1>  mov eax, %1
    88 00000026 CD30                <1>  int 30h
   193                                  cp_usage:
   194                                     ; fprintf(stderr, "Usage: cp: f1 f2; or cp f1 ... fn d2\n");
   195                                  	sys	_msg, usage_msg, 255, 07h
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78 00000028 BB[A3020000]        <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80 0000002D B9FF000000          <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83 00000032 BA07000000          <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 00000037 B823000000          <1>  mov eax, %1
    88 0000003C CD30                <1>  int 30h
   196                                  cp_exit:
   197                                  	sys	_exit	; sys exit
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78                              <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80                              <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83                              <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 0000003E B801000000          <1>  mov eax, %1
    88 00000043 CD30                <1>  int 30h
   198                                  ;hlt:
   199                                  ;	nop
   200                                  ;	nop
   201                                  ;	jmp	short hlt
   202                                  
   203                                  cp_0:
   204 00000045 89C2                    	mov	edx, eax ; [argc]
   205                                  	; 21/04/2022
   206                                  	;;dec	edx  ; argc-1
   207                                  	;dec	dl
   208 00000047 C0E202                  	shl	dl, 2 ; * 4 
   209 0000004A 01D7                    	add	edi, edx
   210                                  
   211                                  	; 21/04/2022
   212 0000004C 3C03                    	cmp	al,3
   213 0000004E 761B                    	jna	short cp_1
   214                                  
   215                                  	sys	_stat, [edi], stbuf2
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78 00000050 8B1F                <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80 00000052 B9[52030000]        <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83                              <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 00000057 B812000000          <1>  mov eax, %1
    88 0000005C CD30                <1>  int 30h
   216 0000005E 72C8                    	jc	short cp_usage
   217                                  
   218                                  	; check retro unix v2 inode flags
   219                                  	;	(a bit different than unix v7 inode flags)
   220                                  	; if it is a directory..
   221                                  	;	regular file flag and dir flag must be 1
   222 00000060 A0[55030000]            	mov	al, [stbuf2+stat.mode+1]
   223 00000065 24C0                    	and	al, S_IFDIR|S_IFREG
   224 00000067 3CC0                    	cmp	al, S_IFDIR|S_IFREG ; directory ?
   225 00000069 75BD                    	jne	short cp_usage ; no
   226                                  	
   227                                  	; check if it is a device file
   228                                  	;test	al, S_IFREG ; regular file ?
   229                                  	;jz	short cp_usage ; no
   230                                  	;and	al, S_IFDIR ; directory ?
   231                                  	;jz	short cp_usage ; no
   232                                   
   233                                  cp_1:	
   234                                  	; esi = esp+4 = argv[0] ; executable file name (cp)
   235 0000006B AD                      	lodsd	; 21/04/2022
   236                                  cp_loop: ; for(i=1; i<argc-1;i++)
   237                                  	;lodsd
   238                                  	; ((esi = esp+8 = argv[1] ; (old) file 1))
   239                                  	; esi = argv[i] 
   240                                   	; edi = argv[argc-1] ; *
   241 0000006C E833000000              	call	copy
   242 00000071 7306                    	jnc	short cp_2
   243                                  
   244 00000073 FE05[49030000]          	inc	byte [errors]
   245                                  cp_2:
   246 00000079 AD                      	lodsd	; 21/04/2022
   247 0000007A 39FE                    	cmp	esi, edi
   248 0000007C 72EE                    	jb	short cp_loop
   249                                  
   250                                  	; bypass 'OK.' message if there was an error
   251 0000007E 803D[49030000]00        	cmp	byte [errors], 0
   252 00000085 77B7                    	ja	short cp_exit
   253                                  cp_ok:
   254                                  	sys	_msg, ok_msg, 255, 07h
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78 00000087 BB[41030000]        <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80 0000008C B9FF000000          <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83 00000091 BA07000000          <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 00000096 B823000000          <1>  mov eax, %1
    88 0000009B CD30                <1>  int 30h
   255                                  ;cp_exit:
   256                                  	sys	_exit	; sys exit
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78                              <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80                              <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83                              <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 0000009D B801000000          <1>  mov eax, %1
    88 000000A2 CD30                <1>  int 30h
   257                                  
   258                                  ;_halt:
   259                                  ;	nop
   260                                  ;	jmp	short _halt
   261                                  
   262                                  copy:	; copy(from, to)
   263                                  	;
   264                                  	; 21/04/2022
   265                                  	; 20/04/2022
   266                                  	; INPUT:
   267                                  	;	esi = pointer to file name to be copied
   268                                  	;  	edi = ptr to new file name or destination dir
   269                                  	; OUTPUT:
   270                                  	;	cf = 0 -> OK
   271                                  	;	cf = 1 -> Error !
   272                                  	;
   273                                  	; Modified registers: eax, ebx, ecx, edx, ebp
   274                                  	;
   275                                  	
   276                                  	; open (old) file for read
   277                                  	sys	_open, [esi], 0 
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78 000000A4 8B1E                <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80 000000A6 B900000000          <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83                              <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 000000AB B805000000          <1>  mov eax, %1
    88 000000B0 CD30                <1>  int 30h
   278 000000B2 7341                    	jnc	short cp_3
   279                                  	
   280                                  	; esi = file name (from)
   281                                  
   282                                  	;fprintf(stderr, "cp: cannot open %s\n", from);
   283                                  	;	return(1);
   284                                  
   285                                  	sys	_msg, cno_err_msg, 255, 07h
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78 000000B4 BB[CC020000]        <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80 000000B9 B9FF000000          <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83 000000BE BA07000000          <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 000000C3 B823000000          <1>  mov eax, %1
    88 000000C8 CD30                <1>  int 30h
   286                                  	; file name (from) 
   287                                  	sys	_msg, [esi], 255, 07h
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78 000000CA 8B1E                <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80 000000CC B9FF000000          <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83 000000D1 BA07000000          <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 000000D6 B823000000          <1>  mov eax, %1
    88 000000DB CD30                <1>  int 30h
   288                                  write_nl:
   289                                  	; new/next line
   290                                  	sys	_msg, nextline, 255, 07h
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78 000000DD BB[C9020000]        <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80 000000E2 B9FF000000          <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83 000000E7 BA07000000          <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 000000EC B823000000          <1>  mov eax, %1
    88 000000F1 CD30                <1>  int 30h
   291 000000F3 F9                      	stc	; return with error (cf=1)
   292 000000F4 C3                      	retn
   293                                  
   294                                  cp_3:
   295 000000F5 A3[4A030000]            	mov	[fold], eax ; file (descriptor) number
   296                                  
   297                                  	; (from)
   298                                  	sys	_fstat, [fold], stbuf1
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78 000000FA 8B1D[4A030000]      <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80 00000100 B9[94030000]        <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83                              <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 00000105 B81C000000          <1>  mov eax, %1
    88 0000010A CD30                <1>  int 30h
   299                                  
   300                                  	; save mode
   301                                  	;mov	ax, [stbuf1.mode]
   302                                  	;mov	[mode], ax
   303                                  	
   304                                  	; (to)
   305                                  	;sys	_stat, [edi], stbuf2  ; stat(to, &stbuf2)
   306                                  	;jnc	short cp_4
   307                                  	;jmp	cp_9
   308                                  	
   309                                  	; 22/04/2022
   310 0000010C 8B2F                    	mov	ebp, [edi] ; ! (cp_8) !
   311                                  	sys	_stat, ebp, stbuf2  ; stat(to, &stbuf2)
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78 0000010E 89EB                <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80 00000110 B9[52030000]        <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83                              <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 00000115 B812000000          <1>  mov eax, %1
    88 0000011A CD30                <1>  int 30h
   312 0000011C 7305                    	jnc	short cp_4
   313 0000011E E982000000              	jmp	cp_9
   314                                  
   315                                  cp_4:
   316                                  	; /* is target a directory? */
   317                                  
   318                                  	; check retro unix v2 inode flags
   319                                  	;	(a bit different than unix v7 inode flags)
   320                                  	; regular file flag and dir flag must be 1 for a dir
   321 00000123 A0[55030000]            	mov	al, [stbuf2+stat.mode+1]
   322 00000128 24C0                    	and	al, S_IFDIR|S_IFREG
   323 0000012A 3CC0                    	cmp	al, S_IFDIR|S_IFREG ; directory ?
   324 0000012C 7541                    	jne	short cp_8 ; no, overwrite (create file)
   325                                  			   ; (if the new file is not same file) 	
   326                                  
   327                                  	; check if it is a device file
   328                                  	;test	al, S_IFREG ; regular file ?
   329                                  	;jz	short cp_error ; no
   330                                  	;and	al, S_IFDIR ; directory ?
   331                                  	;jz	short cp_error ; no
   332                                  
   333                                  	; add (old) file name to (destination ) path
   334                                  	; (directory name +'/'+ file name)  
   335                                  	
   336 0000012E 89F5                    	mov	ebp, esi   ; save esi
   337 00000130 8B37                    	mov	esi, [edi] ; directory name address
   338 00000132 89FB                    	mov	ebx, edi   ; save edi			
   339 00000134 BF[D6030000]            	mov	edi, iobuf ; (new) path name buffer addr	
   340                                  
   341                                  	; p1 = from;
   342                                  	; p2 = to;
   343                                  	; bp = iobuf;
   344                                  cp_5:	; while(*bp++ = *p2++)
   345 00000139 AC                      	lodsb	
   346 0000013A AA                      	stosb
   347 0000013B 20C0                    	and	al, al
   348 0000013D 75FA                    	jnz	short cp_5
   349 0000013F C647FF2F                	mov	byte [edi-1], '/' ; bp[-1] = '/';
   350                                  	; p2 = bp
   351 00000143 89FA                    	mov	edx, edi
   352 00000145 8B7500                  	mov	esi, [ebp] ; *p1 ; from
   353                                  cp_6:	; while(*bp = *p1++)
   354 00000148 AC                      	lodsb
   355 00000149 AA                      	stosb
   356 0000014A 08C0                    	or	al, al
   357 0000014C 7408                    	jz	short cp_7
   358 0000014E 3C2F                    	cmp	al, '/' ; if (*bp++ == '/')
   359 00000150 75F6                    	jne	short cp_6
   360                                  	; bp = p2
   361                                  	; 21/04/2022
   362 00000152 89D7                    	mov	edi, edx ; (discard path before file name)
   363 00000154 EBF2                    	jmp	short cp_6
   364                                  cp_7:	
   365 00000156 89EE                    	mov	esi, ebp ; restore esi
   366 00000158 89DF                    	mov	edi, ebx ; restore edi
   367                                  	; to = iobuf
   368 0000015A BD[D6030000]            	mov	ebp, iobuf
   369                                  		
   370                                  	sys	_stat, ebp, stbuf2  ; stat(to, &stbuf2) >= 0
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78 0000015F 89EB                <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80 00000161 B9[52030000]        <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83                              <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 00000166 B812000000          <1>  mov eax, %1
    88 0000016B CD30                <1>  int 30h
   371 0000016D 7236                    	jc	short cp_10 ; create new file
   372                                  
   373                                  cp_8:
   374                                  	;if (stbuf1.st_dev == stbuf2.st_dev &&
   375                                  	;   stbuf1.st_ino == stbuf2.st_ino) {
   376                                  	;	fprintf(stderr, "cp: cannot copy file to itself.\n");
   377                                  	; 	return(1);
   378                                  
   379 0000016F 66A1[94030000]          	mov	ax, [stbuf1+stat.inode]
   380 00000175 663B05[52030000]        	cmp	ax, [stbuf2+stat.inode]
   381 0000017C 7527                    	jne	short cp_10
   382                                  
   383                                  	; same file ! error...
   384 0000017E BD[DF020000]            	mov	ebp, cncis_err_msg ; error message
   385                                  	; esi = file name (from)
   386                                  write_err_msg:
   387                                  	sys	_msg, ebp, 255, 07h
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78 00000183 89EB                <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80 00000185 B9FF000000          <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83 0000018A BA07000000          <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 0000018F B823000000          <1>  mov eax, %1
    88 00000194 CD30                <1>  int 30h
   388                                  	; close (old) file
   389                                  	sys	_close, [fold]
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78 00000196 8B1D[4A030000]      <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80                              <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83                              <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 0000019C B806000000          <1>  mov eax, %1
    88 000001A1 CD30                <1>  int 30h
   390 000001A3 F9                      	stc	; return with error (cf=1)
   391 000001A4 C3                      	retn
   392                                  
   393                                  cp_9:
   394                                  	; 22/04/2022
   395                                  	; ebp = [edi]
   396                                  	; 21/04/2022
   397                                  	; new file (asciiz name address)
   398                                  	;mov	ebp, [edi]
   399                                  
   400                                  	; create new file (truncate if it exists) 
   401                                  cp_10:
   402                                  	; fnew = creat(to, mode)
   403 000001A5 0FB70D[96030000]        	movzx 	ecx, word [stbuf1+stat.mode]
   404                                  	; ecx = mode 
   405                                  	sys	_creat, ebp 
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78 000001AC 89EB                <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80                              <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83                              <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 000001AE B808000000          <1>  mov eax, %1
    88 000001B3 CD30                <1>  int 30h
   406 000001B5 733B                    	jnc	short cp_11
   407                                  
   408                                  	;if ((fnew = creat(to, mode)) < 0) {
   409                                  	;	fprintf(stderr, "cp: cannot create %s\n", to);
   410                                  	;	close(fold);
   411                                  	;	return(1);
   412                                  
   413                                  	; 24/04/2022
   414                                  	sys	_close, [fold]
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78 000001B7 8B1D[4A030000]      <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80                              <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83                              <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 000001BD B806000000          <1>  mov eax, %1
    88 000001C2 CD30                <1>  int 30h
   415                                  
   416                                  	; error message
   417                                  	sys	_msg, ccf_err_msg, 255, 07h
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78 000001C4 BB[03030000]        <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80 000001C9 B9FF000000          <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83 000001CE BA07000000          <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 000001D3 B823000000          <1>  mov eax, %1
    88 000001D8 CD30                <1>  int 30h
   418                                  
   419                                  	; 24/04/2022
   420                                  	; and file name (to) -at the end of error message-
   421                                  	sys	_msg, ebp, 255, 07h 
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78 000001DA 89EB                <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80 000001DC B9FF000000          <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83 000001E1 BA07000000          <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 000001E6 B823000000          <1>  mov eax, %1
    88 000001EB CD30                <1>  int 30h
   422                                  	; write next line (move cursor to next line)
   423                                  	; and return (from this/copy subroutine)
   424 000001ED E9EBFEFFFF              	jmp	write_nl
   425                                  
   426                                  cp_11:	
   427                                  	; 21/04/2022
   428 000001F2 A3[4E030000]            	mov	[fnew], eax
   429                                  cp_rw_next:
   430                                  	; while(n = read(fold, iobuf, BSIZE))
   431                                  	sys	_read, [fold], iobuf, BSIZE
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78 000001F7 8B1D[4A030000]      <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80 000001FD B9[D6030000]        <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83 00000202 BA00020000          <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 00000207 B803000000          <1>  mov eax, %1
    88 0000020C CD30                <1>  int 30h
   432 0000020E 7317                    	jnc	short cp_12
   433                                  
   434                                  	;if (n < 0) {
   435                                  	;   fprintf(stderr, "cp: read error\n");
   436                                  
   437                                  	; write read error message
   438 00000210 BD[18030000]            	mov	ebp, crd_err_msg
   439                                  
   440                                  cp_rw_err:
   441                                  	; 21/04/2022
   442                                  	; cf = 1
   443                                  	sys	_close, [fnew]	
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78 00000215 8B1D[4E030000]      <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80                              <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83                              <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 0000021B B806000000          <1>  mov eax, %1
    88 00000220 CD30                <1>  int 30h
   444 00000222 E95CFFFFFF              	jmp	write_err_msg
   445                                  
   446                                  cp_12:
   447                                  	; eax = read count
   448                                  	; eax = 0 -> eof
   449 00000227 09C0                    	or	eax, eax
   450 00000229 7423                    	jz	short cp_14 ; eof
   451                                  
   452 0000022B 89C5                    	mov	ebp, eax  ; n	
   453                                  	; write(fnew, iobuf, n)
   454                                  	sys	_write, [fnew], iobuf, ebp
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78 0000022D 8B1D[4E030000]      <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80 00000233 B9[D6030000]        <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83 00000238 89EA                <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 0000023A B804000000          <1>  mov eax, %1
    88 0000023F CD30                <1>  int 30h
   455 00000241 7204                    	jc	short cp_13
   456                                  
   457                                  	;if (write(fnew, iobuf, n) != n)
   458                                  	;   fprintf(stderr, "cp: write error.\n");
   459                                  	;   close(fold);
   460                                  	;   close(fnew);
   461                                  	;   return(1);
   462                                  
   463                                  	; eax = written bytes
   464 00000243 39E8                    	cmp	eax, ebp
   465                                  	;je	short cp_11 ; read next (block)
   466                                  	; 21/04/2022
   467 00000245 74B0                    	je	short cp_rw_next
   468                                  	; error !
   469                                  	; eax < ebp --> cf = 1
   470                                  cp_13:
   471                                  	; close new file
   472                                  	; and then write error mesage
   473                                  	; and then close old file
   474                                  	; and then write (move cursor to) next line
   475                                  	; and then return (from subroutine) 
   476                                  	;sys	_close, [fnew]
   477                                  
   478                                  	; write error message
   479 00000247 BD[2C030000]            	mov	ebp, cwr_err_msg
   480                                  	;jmp	short write_err_msg
   481                                  	; 21/04/2022
   482 0000024C EBC7                    	jmp	short cp_rw_err
   483                                  
   484                                  	; eof
   485                                  cp_14:
   486                                  	;close(fold);
   487                                  	;close(fnew);
   488                                  	;return(0);
   489                                  	
   490                                  	sys	_close, [fold]
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78 0000024E 8B1D[4A030000]      <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80                              <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83                              <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 00000254 B806000000          <1>  mov eax, %1
    88 00000259 CD30                <1>  int 30h
   491                                  	sys	_close, [fnew]
    74                              <1> 
    75                              <1> 
    76                              <1> 
    77                              <1>  %if %0 >= 2
    78 0000025B 8B1D[4E030000]      <1>  mov ebx, %2
    79                              <1>  %if %0 >= 3
    80                              <1>  mov ecx, %3
    81                              <1> 
    82                              <1>  %if %0 >= 4
    83                              <1>  mov edx, %4
    84                              <1>  %endif
    85                              <1>  %endif
    86                              <1>  %endif
    87 00000261 B806000000          <1>  mov eax, %1
    88 00000266 CD30                <1>  int 30h
   492                                  	
   493                                  	;clc
   494 00000268 C3                      	retn
   495                                  	
   496                                  ;-----------------------------------------------------------------
   497                                  ;  data - initialized data
   498                                  ;-----------------------------------------------------------------
   499                                  
   500                                  ;argc:	dd 0
   501 00000269 00                      argc:	db 0
   502                                  
   503                                  ; ----------------------------------------------------------------
   504                                  
   505                                  program_msg:
   506 0000026A 0D0A                    	db  0Dh, 0Ah
   507 0000026C 526574726F20554E49-     	db  'Retro UNIX 386 v1.2 COPY by Erdogan TAN - 24/04/2022'
   507 00000275 58203338362076312E-
   507 0000027E 3220434F5059206279-
   507 00000287 204572646F67616E20-
   507 00000290 54414E202D2032342F-
   507 00000299 30342F32303232     
   508 000002A0 0D0A00                  	db  0Dh, 0Ah, 0
   509                                  
   510                                  usage_msg:
   511 000002A3 0D0A                    	db  0Dh, 0Ah
   512 000002A5 55736167653A206370-     	db  'Usage: cp: f1 f2; or cp f1 ... fn d2'
   512 000002AE 3A2066312066323B20-
   512 000002B7 6F7220637020663120-
   512 000002C0 2E2E2E20666E206432 
   513                                  nextline:
   514 000002C9 0D0A00                  	db  0Dh, 0Ah, 0
   515                                  
   516                                  cno_err_msg:
   517 000002CC 0D0A                    	db 0Dh, 0Ah
   518 000002CE 63703A2063616E6E6F-     	db 'cp: cannot open '
   518 000002D7 74206F70656E20     
   519 000002DE 00                      	db 0
   520                                  cncis_err_msg:
   521 000002DF 0D0A                    	db 0Dh, 0Ah
   522 000002E1 63703A2063616E6E6F-     	db 'cp: cannot copy file to itself.'
   522 000002EA 7420636F7079206669-
   522 000002F3 6C6520746F20697473-
   522 000002FC 656C662E           
   523 00000300 0D0A00                  	db 0Dh, 0Ah, 0
   524                                  
   525                                  ccf_err_msg:
   526 00000303 0D0A                    	db 0Dh, 0Ah
   527 00000305 63703A2063616E6E6F-     	db 'cp: cannot create '
   527 0000030E 742063726561746520 
   528 00000317 00                      	db 0
   529                                  
   530                                  crd_err_msg:
   531 00000318 0D0A                    	db 0Dh, 0Ah
   532 0000031A 63703A207265616420-     	db 'cp: read error.'
   532 00000323 6572726F722E       
   533 00000329 0D0A00                  	db 0Dh, 0Ah, 0
   534                                  
   535                                  cwr_err_msg:
   536 0000032C 0D0A                    	db 0Dh, 0Ah
   537 0000032E 63703A207772697465-     	db 'cp: write error.'
   537 00000337 206572726F722E     
   538 0000033E 0D0A00                  	db 0Dh, 0Ah, 0
   539                                  
   540                                  ok_msg:
   541 00000341 0D0A                    	db  0Dh, 0Ah
   542 00000343 4F4B2E                  	db  'OK.'
   543 00000346 0D0A00                  	db  0Dh, 0Ah, 0
   544                                  
   545 00000349 00                      errors:	db 0
   546                                  
   547                                  ;-----------------------------------------------------------------
   548                                  ;  bss - uninitialized data
   549                                  ;-----------------------------------------------------------------
   550                                  
   551                                  align 2
   552                                  
   553                                  bss_start:
   554                                  
   555                                  ABSOLUTE bss_start
   556                                  
   557                                  ; 20/04/2022
   558 0000034A ????????                fold:	resd 1
   559 0000034E ????????                fnew:	resd 1
   560                                  
   561 00000352 <res 42h>               stbuf2:	resb 66 ; for Retro UNIX 386 v1.2 (66 byte sysstat data)
   562 00000394 <res 42h>               stbuf1:	resb 66 ; for Retro UNIX 386 v1.2 (66 byte sysstat data)
   563                                  
   564 000003D6 <res 200h>              iobuf:	resb BSIZE ; resb 512 ; path name buffer
   565                                  
   566                                  ; 20/04/2022
   567                                  ;-----------------------------------------------------------------
   568                                  ; Original UNIX v7 - cp (utility) c source code (cp.c)
   569                                  ;-----------------------------------------------------------------
   570                                  ;/* UNIX V7 source code: see www.tuhs.org for details. */;
   571                                  ;
   572                                  ;/*
   573                                  ; * cp oldfile newfile
   574                                  ; */
   575                                  ;
   576                                  ;#define BSIZE	512
   577                                  ;#include <stdio.h>
   578                                  ;#include <sys/types.h>
   579                                  ;#include <sys/stat.h>
   580                                  ;struct	stat stbuf1, stbuf2;
   581                                  ;char iobuf[BSIZE];
   582                                  ;
   583                                  ;main(argc, argv)
   584                                  ;char *argv[];
   585                                  ;{
   586                                  ;	register i, r;
   587                                  ;
   588                                  ;	if (argc < 3) 
   589                                  ;		goto usage;
   590                                  ;	if (argc > 3) {
   591                                  ;		if (stat(argv[argc-1], &stbuf2) < 0)
   592                                  ;			goto usage;
   593                                  ;		if ((stbuf2.st_mode&S_IFMT) != S_IFDIR) 
   594                                  ;			goto usage;
   595                                  ;	}
   596                                  ;	r = 0;
   597                                  ;	for(i=1; i<argc-1;i++)
   598                                  ;		r |= copy(argv[i], argv[argc-1]);
   599                                  ;	exit(r);
   600                                  ;usage:
   601                                  ;	fprintf(stderr, "Usage: cp: f1 f2; or cp f1 ... fn d2\n");
   602                                  ;	exit(1);
   603                                  ;}
   604                                  ;
   605                                  ;copy(from, to)
   606                                  ;char *from, *to;
   607                                  ;{
   608                                  ;	int fold, fnew, n;
   609                                  ;	register char *p1, *p2, *bp;
   610                                  ;	int mode;
   611                                  ;	if ((fold = open(from, 0)) < 0) {
   612                                  ;		fprintf(stderr, "cp: cannot open %s\n", from);
   613                                  ;		return(1);
   614                                  ;	}
   615                                  ;	fstat(fold, &stbuf1);
   616                                  ;	mode = stbuf1.st_mode;
   617                                  ;	/* is target a directory? */
   618                                  ;	if (stat(to, &stbuf2) >=0 &&
   619                                  ;	   (stbuf2.st_mode&S_IFMT) == S_IFDIR) {
   620                                  ;		p1 = from;
   621                                  ;		p2 = to;
   622                                  ;		bp = iobuf;
   623                                  ;		while(*bp++ = *p2++)
   624                                  ;			;
   625                                  ;		bp[-1] = '/';
   626                                  ;		p2 = bp;
   627                                  ;		while(*bp = *p1++)
   628                                  ;			if (*bp++ == '/')
   629                                  ;				bp = p2;
   630                                  ;		to = iobuf;
   631                                  ;	}
   632                                  ;	if (stat(to, &stbuf2) >= 0) {
   633                                  ;		if (stbuf1.st_dev == stbuf2.st_dev &&
   634                                  ;		   stbuf1.st_ino == stbuf2.st_ino) {
   635                                  ;			fprintf(stderr, "cp: cannot copy file to itself.\n");
   636                                  ;			return(1);
   637                                  ;		}
   638                                  ;	}
   639                                  ;	if ((fnew = creat(to, mode)) < 0) {
   640                                  ;		fprintf(stderr, "cp: cannot create %s\n", to);
   641                                  ;		close(fold);
   642                                  ;		return(1);
   643                                  ;	}
   644                                  ;	while(n = read(fold,  iobuf,  BSIZE)) {
   645                                  ;		if (n < 0) {
   646                                  ;			fprintf(stderr, "cp: read error\n");
   647                                  ;			close(fold);
   648                                  ;			close(fnew);
   649                                  ;			return(1);
   650                                  ;		} else
   651                                  ;			if (write(fnew, iobuf, n) != n) {
   652                                  ;				fprintf(stderr, "cp: write error.\n");
   653                                  ;				close(fold);
   654                                  ;				close(fnew);
   655                                  ;				return(1);
   656                                  ;			}
   657                                  ;	}
   658                                  ;	close(fold);
   659                                  ;	close(fnew);
   660                                  ;	return(0);
   661                                  ;}
