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bvi/bvi.1
Gerhard Bürgmann be3c9f064d bvi-1.4.0.src.tar.gz
2015-02-20 11:00:46 -05:00

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.rn '' }`
''' $RCSfile$$Revision$$Date$
'''
''' $Log$
'''
.de Sh
.br
.if t .Sp
.ne 5
.PP
\fB\\$1\fR
.PP
..
.de Sp
.if t .sp .5v
.if n .sp
..
.de Ip
.br
.ie \\n(.$>=3 .ne \\$3
.el .ne 3
.IP "\\$1" \\$2
..
.de Vb
.ft CW
.nf
.ne \\$1
..
.de Ve
.ft R
.fi
..
'''
'''
''' Set up \*(-- to give an unbreakable dash;
''' string Tr holds user defined translation string.
''' Bell System Logo is used as a dummy character.
'''
.tr \(*W-|\(bv\*(Tr
.ie n \{\
.ds -- \(*W-
.ds PI pi
.if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch
.if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch
.ds L" ""
.ds R" ""
''' \*(M", \*(S", \*(N" and \*(T" are the equivalent of
''' \*(L" and \*(R", except that they are used on ".xx" lines,
''' such as .IP and .SH, which do another additional levels of
''' double-quote interpretation
.ds M" """
.ds S" """
.ds N" """""
.ds T" """""
.ds L' '
.ds R' '
.ds M' '
.ds S' '
.ds N' '
.ds T' '
'br\}
.el\{\
.ds -- \(em\|
.tr \*(Tr
.ds L" ``
.ds R" ''
.ds M" ``
.ds S" ''
.ds N" ``
.ds T" ''
.ds L' `
.ds R' '
.ds M' `
.ds S' '
.ds N' `
.ds T' '
.ds PI \(*p
'br\}
.\" If the F register is turned on, we'll generate
.\" index entries out stderr for the following things:
.\" TH Title
.\" SH Header
.\" Sh Subsection
.\" Ip Item
.\" X<> Xref (embedded
.\" Of course, you have to process the output yourself
.\" in some meaninful fashion.
.if \nF \{
.de IX
.tm Index:\\$1\t\\n%\t"\\$2"
..
.nr % 0
.rr F
.\}
.TH BVI 1 "BVI Version 1.4.0" "25/Aug/2013" "User Commands"
.IX Title "BVI 1"
.UC
.IX Name "bvi, bview - visual display editor for binary files"
.if n .hy 0
.if n .na
.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
.de CQ \" put $1 in typewriter font
.ft CW
'if n "\c
'if t \\&\\$1\c
'if n \\&\\$1\c
'if n \&"
\\&\\$2 \\$3 \\$4 \\$5 \\$6 \\$7
'.ft R
..
.\" @(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2
. \" AM - accent mark definitions
.bd B 3
. \" fudge factors for nroff and troff
.if n \{\
. ds #H 0
. ds #V .8m
. ds #F .3m
. ds #[ \f1
. ds #] \fP
.\}
.if t \{\
. ds #H ((1u-(\\\\n(.fu%2u))*.13m)
. ds #V .6m
. ds #F 0
. ds #[ \&
. ds #] \&
.\}
. \" simple accents for nroff and troff
.if n \{\
. ds ' \&
. ds ` \&
. ds ^ \&
. ds , \&
. ds ~ ~
. ds ? ?
. ds ! !
. ds /
. ds q
.\}
.if t \{\
. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u"
. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u'
. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u'
. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u'
. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u'
. ds ? \s-2c\h'-\w'c'u*7/10'\u\h'\*(#H'\zi\d\s+2\h'\w'c'u*8/10'
. ds ! \s-2\(or\s+2\h'-\w'\(or'u'\v'-.8m'.\v'.8m'
. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u'
. ds q o\h'-\w'o'u*8/10'\s-4\v'.4m'\z\(*i\v'-.4m'\s+4\h'\w'o'u*8/10'
.\}
. \" troff and (daisy-wheel) nroff accents
.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V'
.ds 8 \h'\*(#H'\(*b\h'-\*(#H'
.ds v \\k:\h'-(\\n(.wu*9/10-\*(#H)'\v'-\*(#V'\*(#[\s-4v\s0\v'\*(#V'\h'|\\n:u'\*(#]
.ds _ \\k:\h'-(\\n(.wu*9/10-\*(#H+(\*(#F*2/3))'\v'-.4m'\z\(hy\v'.4m'\h'|\\n:u'
.ds . \\k:\h'-(\\n(.wu*8/10)'\v'\*(#V*4/10'\z.\v'-\*(#V*4/10'\h'|\\n:u'
.ds 3 \*(#[\v'.2m'\s-2\&3\s0\v'-.2m'\*(#]
.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#]
.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H'
.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u'
.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#]
.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#]
.ds ae a\h'-(\w'a'u*4/10)'e
.ds Ae A\h'-(\w'A'u*4/10)'E
.ds oe o\h'-(\w'o'u*4/10)'e
.ds Oe O\h'-(\w'O'u*4/10)'E
. \" corrections for vroff
.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u'
.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u'
. \" for low resolution devices (crt and lpr)
.if \n(.H>23 .if \n(.V>19 \
\{\
. ds : e
. ds 8 ss
. ds v \h'-1'\o'\(aa\(ga'
. ds _ \h'-1'^
. ds . \h'-1'.
. ds 3 3
. ds o a
. ds d- d\h'-1'\(ga
. ds D- D\h'-1'\(hy
. ds th \o'bp'
. ds Th \o'LP'
. ds ae ae
. ds Ae AE
. ds oe oe
. ds Oe OE
.\}
.rm #[ #] #H #V #F C
.SH "NAME"
.IX Header "NAME"
bvi, bview \- visual editor for binary files
.SH "VERSION"
.IX Header "VERSION"
bvi-1.4.0
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\fBbvi\fR\ \ \ [\fB\-R\fR]\ [\fB\-c\fR\ \fIcmd\fR]\ [\fB\-f\fR\ \fIscript\fR]\ [\fB\-s\fR\ \fIskip\fR]\ [\fB\-e\fR\ \fIend\fR]\ [\fB\-n\fR\ \fIlength\fR]\ \fIfile\fR...
\fBbview\fR\ [\fB\-R\fR]\ [\fB\-c\fR\ \fIcmd\fR]\ [\fB\-f\fR\ \fIscript\fR]\ [\fB\-s\fR\ \fIskip\fR]\ [\fB\-e\fR\ \fIend\fR]\ [\fB\-n\fR\ \fIlength\fR]\ \fIfile\fR...
.SH "OPTIONS"
.IX Header "OPTIONS"
.Ip "\fIfile\fR..." 4
.IX Item "\fIfile\fR..."
A list of filenames. The first one will be the current file and
will be read
into the buffer. The cursor will be positioned on the first line of
the buffer. You can get to the other files with the ":next" command.
.Ip "\fB\-R\fR" 4
.IX Item "\fB\-R\fR"
\*(L"Readonly": The readonly flag is set for all the files,
preventing accidental overwriting with a write command.
.Ip "\fB\-s\fR \fIskip\fR" 4
.IX Item "\fB\-s\fR \fIskip\fR"
causes bvi to load a file not from the start but from
offset \fIskip\fR.
Skip offset bytes from the beginning of the input. By default, offset
is interpreted as a decimal number. With a leading 0x or 0X, offset is
interpreted as a hexadecimal number, otherwise, with a leading 0, offset
is interpreted as an octal number. Appending the character b, k, or m
to offset causes it to be interpreted as a multiple of 512, 1024, or
1048576, respectively.
.Ip "\fB\-e\fR \fIend\fR" 4
.IX Item "\fB\-e\fR \fIend\fR"
causes bvi to load a file not till end but till address \fIend\fR.
.Ip "\fB\-n\fR \fIlength\fR" 4
.IX Item "\fB\-n\fR \fIlength\fR"
causes bvi not to load the complete file but only \fIlength\fR bytes.
.Ip "\fB\-c\fR \fIcmd\fR" 4
.IX Item "\fB\-c\fR \fIcmd\fR"
\fIcmd\fR will be executed after the first
file has been read. If the \fIcmd\fR contains
spaces it must be enclosed in double quotes
(this depends on the shell that is used).
.Ip "\fB\-f\fR \fIscript\fR" 4
.IX Item "\fB\-f\fR \fIscript\fR"
This command provides a means for collecting a series of \*(L"ex\*(R"
(colon) commands into a script file, then using this file to edit
other files. Since there is no binary stream editor \*(L"bsed\*(R", you
can use this option to make several global changes in a binary file.
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Bvi stands for \*(L"Binary VIsual editor\*(R".
Bvi is a screen oriented editor for binary files;
its command set is based on that of the \fIvi\fR\|(1) text editor.
As a binary editor does not have the concept of \*(L"lines\*(R"
there are differences from Vi commands wherever the latter are
line orientate.
.SH "COMPARISON"
.IX Header "COMPARISON"
The main differences between Vi and Bvi are:
.PP
The screen is divided in three sections or panes:
The byte offset (extreme left), the hex pane (middle),
and an ascii pane (right) which shows as printable characters
those bytes in the hex pane.
On an 80 column terminal there will be sixteen hex values
and their ASCII values on each screen line.
Note that (as one would expect) the first byte has the offset \*(L'0\*(R' (zero).
.PP
You can toggle between the hex and ascii windows with the tab key (TAB).
Toggling between these two windows does not change the current
position (offset) within the file.
.PP
No \*(L"lines\*(R" concept:
Files are treated as one long stream of bytes. The characters
\*(L"newline\*(R" and \*(L"carriage return\*(R" are not special, id est they
never mark the end of lines. Therefore the lines on the screen do not
represent lines in the usual way. Data is broken across screen lines
arbitarily.
As a consequence there are no commands in bvi from ex or vi
that are based on line numbers, eg \*(L"dd\*(R", \*(L"yy\*(R", \*(L'C\*(R', \*(L'S\*(R', \*(L'o\*(R', \*(L'O\*(R'.
This also changes the meaning of \*(L"range\*(R" before the \*(L":write\*(R" command
to a byte offset, ie the command \*(L":100,200w foo\*(R" writes all *bytes*
(not lines) from offset 100 to offset 200 to the file \*(L"foo\*(R".
.PP
No \*(L"text objects":
There are also no text-specific arrangements like words,
paragraphs, sentences, sections and so on.
.PP
Extended \*(L"ruler":
The bottom line of the screen shows the current address (byte offset)
and the current character in these notations:
.PP
.Vb 1
\& octal, hexadecimal, decimal and ascii.
.Ve
Search patterns:
All search commands understand these special characters:
.PP
.Vb 3
\& . any character
\& [] set of characters
\& * zero or more occurrences of previous char or set
.Ve
But as there is no concept of lines you cannot use the standard symbols
("anchors") for \*(L"begin-of-line\*(R" ('^') and \*(L"end-of-line\*(R" ('$').
Searching for the start/end of lines must be done explicitly
by adding these special characters to your search pattern
using these meta sequences:
.PP
.Vb 4
\& \en newline
\& \er return
\& \et tab
\& \e0 binary zero
.Ve
Additional search commands:
Similar to the text search commands there are additional hex-search
functions \*(L'\e\*(R' and \*(L'#\*(R' which allow to search for any byte value.
Example: \*(L"\e62 76 69\*(R" will search for the string \*(L"bvi\*(R".
Spaces between hex value are optional, so searching
for \*(L"6775636B6573\*(R" will find \*(L"guckes\*(R".
.PP
Changing the length of data (insertion, deletion) moves the data to other addresses;
this is bad for many cases (eg. databases, program files) and is
thus disabled by default. You can enable this commands by typing
.PP
\f(CW :set memmove\fR
.PP
\fBBVI Modes:\fR
.PP
Command Mode (Normal Mode):
.PP
Input is treated as command. Note that command mode is the default
mode after startup and after escaping from input mode.
Use ESC (escape) to cancel a partial (uncompleted) command.
.PP
Input Mode:
.PP
Input is treated as replacement of current characters or
(after the end of the file) is appended
to the current file. This mode is entered from command mode by
typing one of \*(L'i\*(R', \*(L'I\*(R', \*(L'A\*(R', \*(L'r\*(R', or \*(L'R\*(R'.
You can enter the characters from the keyboard (in the ASCII window) or
hexadecimal values (in the HEX window).
Type TAB to switch between these two windows.
Type ESC to finish the current input and return to command mode.
Type CTRL\-C to cancel current command abnormally.
.PP
Command line mode (Last Line Mode or : mode):
.PP
Similar to vi, this mode is entered by typing one of the
characters
: / ? \e # !
The command is terminated and executed by typing a carriage
return; to cancel a partially typed command, type
ESC to cancel the current command and return to command mode.
.SH "ENVIRONMENT"
.IX Header "ENVIRONMENT"
The editor recognizes the environment variable BVIINIT as a
command (or list of commands) to run when it starts up. If
this variable is undefined, the editor checks for startup
commands in the file \fI~/.bvirc\fR file, which you must own.
However, if there is a \fI.bvirc\fR owned by you in the current
directory, the editor takes its startup commands from this
file \- overriding both the file in your home directory and
the environment variable.
.SH "TERMINOLOGY"
.IX Header "TERMINOLOGY"
Characters names are abbreviated as follows:
Abbr. ASCII name aka
CR 010 carriage return
^A 001 control-a
^H 008 control-h
^I 009 control-i aka TAB
^U 021 control-u
^Z 026 control-z
ESC 027 escape aka ESC
DEL 127 delete
LEFT --- left arrow
RIGHT --- right arrow
DOWN --- down arrow
UP --- up arrow
.SH "COMMAND SUMMARY"
.IX Header "COMMAND SUMMARY"
See the TERMINOLOGY for a summary on key name abbreviations
used within the following description of commands.
.PP
\fBAbstract:\fR
Arrow keys move the cursor on the screen within the current window.
.PP
\fBSample commands:\fR
:version show version info
<\- v ^ \-> arrow keys move the cursor
h j k l same as arrow keys
u undo previous change
ZZ exit bvi, saving changes
:q! quit, discarding changes
/\fItext\fR search for \fItext\fR
^U ^D scroll up or down
.PP
\fBCounts before bvi commands:\fR
Numbers may be typed as a prefix to some commands.
They are interpreted in one of these ways.
.PP
.Vb 4
\& screen column |
\& byte of file G
\& scroll amount ^D ^U
\& repeat effect most of the rest
.Ve
\fBInterrupting, canceling\fR
ESC end insert or incomplete command
DEL (delete or rubout) interrupts
.PP
\fBFile manipulation:\fR
ZZ if file modified, write and exit;
otherwise, exit
:w write changed buffer to file
:w! write changed buffer to file, overriding
read-only ("forced\*(R" write)
:q quit when no changes have been made
:q! quit and discard all changes
:e \fIfile\fR edit \fIfile\fR
:e! re-read current file, discard all changes
:e # edit the alternate file
:e! # edit the alternate file, discard changes
:w \fIfile\fR write current buffer to \fIfile\fR
:w! \fIfile\fR write current buffer to \fIfile\fR overriding
read-only (this \*(L"overwrites\*(R" the file)
:sh run the command as set with option \*(L"shell\*(R",
then return
:!\fIcmd\fR run the command \fIcmd\fR from \*(L"shell\*(R", then
return
:n edit next file in the argument list
:f show current filename, modified flag,
current byte offset, and percentage of
current position within buffer
^G same as :f
.PP
\fBAdditional edit commands\fR
You can insert/append/change bytes in ASCII/binary/decimal/
hexadecimal or octal representation. You can enter several
(screen) lines of input. A line with only a period (.) in it
will terminate the command. You must not type in values greater
than a byte value. This causes an abandonment of the command.
Pressing the CR key does not insert a newline \- character into
the file. If you use ASCII mode you can use the special characters
\en, \er, \et and \e0.
.PP
.Vb 3
\& :i aCR insert bytes (ASCII) at cursor position
\& :a bCR append bytes (Binary) at end of file
\& :c hCR change bytes (hexadecimal) at cursor position
.Ve
\fBBit-level operations\fR
:and \fIn\fR bitwise \*(L'and\*(R' operation with value \fIn\fR
:or \fIn\fR bitwise \*(L'or\*(R' operation with value \fIn\fR
:xor \fIn\fR bitwise \*(L'xor\*(R' operation with value \fIn\fR
:neg two's complement
:not logical negation
:sl \fIi\fR shift each byte \fIi\fR bits to the left
:sr \fIi\fR shift each byte \fIi\fR bits to the right
:rl \fIi\fR rotate each byte \fIi\fR bits to the left
:rr \fIi\fR rotate each byte \fIi\fR bits to the right
.PP
\fBCommand mode addresses\fR
:w foo write current buffer to a file
named \*(L"foo\*(R"
:5,10w foo copy byte 5 through 100 into as
file named foo
:.,.+20w foo copy the current byte and the next
20 bytes to foo
:^,'aw foo write all bytes from the beginning
through marker \*(L'a\*(R'
:/\fIpat\fR/,$ foo search pattern \fIpat\fR and and copy
through end of file
.PP
\fBPositioning within file:\fR
^B backward screen
^F forward screen
^D scroll down half screen
^U scroll up half screen
\fIn\fRG go to the specified character
(end default), where \fIn\fR is a decimal address
/\fIpat\fR next line matching \fIpat\fR
?\fIpat\fR previous line matching \fIpat\fR
\e\fIhex\fR jump to next occurrence of hex string \fIhex\fR
#\fIhex\fR jump to previous occurrence of hex string \fIhex\fR
n repeat last search command
N repeat last search command, but in opposite
direction
.PP
\fBAdjusting the screen:\fR
^L clear and redraw screen
zCR redraw screen with current line at top of screen
z- redraw screen with current line at bottom of
screen
z. redraw screen with current line at center of
screen
/\fIpat\fR/z- search for pattern \fIpat\fR and then move currents
line to bottom
^E scroll screen down 1 line
^Y scroll screen up 1 line
.PP
\fBMarking and returning:\fR
m\fIx\fR mark current position with lower-case letter \fIx\fR
Note: this command works for all lower-case letters
\*(L'\fIx\fR move cursor to mark \fIx\fR in ASCII section
`\fIx\fR move cursor to mark \fIx\fR in HEX section
\*(L'\*(R' move cursor to previous context in ASCII section
`` move cursor to previous context in HEX section
\fBLine positioning:\fR
H jump to first line on screen ("top")
L jump to last line on screen ("low")
M jump to middle line on screen ("middle")
\- jump onto previous line on screen
+ jump onto next line on screen
CR same as +
DOWN or j next line, same column
UP or k previous line, same column
.PP
\fBCharacter positioning:\fR
^ first byte in HEX window
$ end of screen line
l or RIGHT jump onto next byte (within current
screen line)
h or LEFT jump onto previous byte (within current
screen line)
^H same as LEFT
space same as RIGHT
f\fIx\fR find next occurrence of character \fIx\fR
F\fIx\fR find previous occurrence of character \fIx\fR
\fIn\fR| jump onto \fIn\fRth byte/character within current
line
.PP
\fBStrings:\fR
(works similar to the \fIstrings\fR\|(1) command)
Note: \*(L"Words\*(R" are defined as strings of \*(L"nonprinting
characters\*(R".
e jump to next end of word
w jump to next begin of word
b jump to previous begin of word
W forward to next string delimited with a
\e0 or \en
B back to previous string delimited with a
nonprinting char
.PP
\fBCorrections during insert:\fR
^H erase last character (backspace)
erase your erase character, same as ^H (backspace)
ESC ends insertion, back to command mode
.PP
\fBAppend and replace:\fR
A append at end of file
rx replace current bte with char \*(L'x\*(R'
R enter replace mode; for all subsequent input,
the current byte is overwritten with the next
input character; leave replace mode with ESC.
.PP
\fBMiscellaneous Operations:\fR
TAB toggle between ASCII and HEX section
.PP
\fBYank and Put:\fR
3ySPACE yank 3 characters
p insert contents of yank buffer
o replace text with content of yank buffer
P put back at end of file
.PP
\fBUndo, Redo:\fR
u undo last change
Note: Only the last change can be undone.
Therefore this commands toggles between the
last and second-t-last state of the buffer.
.PP
\fBSetting Options:\fR
With the :set command you can set options in bvi
.PP
.Vb 1
\& Option Default Description
.Ve
.Vb 19
\& autowrite noaw Save current file, if modified, if you
\& give a :n, :r or ! command
\& columns cm=16 on an 80 character wide terminal
\& ignorecase noic Ignores letter case in searching
\& magic nomagic Makes . [ * special in patterns
\& memmove nomm enables insert and delete commands
\& offset of=0 adds an offset to the diplayed addresses
\& readonly noro If set, write fails unless you use ! after command
\& scroll sc=1/2 window
\& Number of lines scrolled by ^U and ^D
\& showmode mo Displays statusline on bottom of the screen
\& terse noterse Let you obtain shorter error messages
\& window window=screensize
\& Lines in window, can be reduced at slow terminals
\& wordlength wl=4 Length of an ASCII-string found by w, W, b or B
\& wrapscan ws Searches wrap around past the end of the file
\& unixstyle nous The representation of ascii characters below
\& 32 is displayed in the statusline as shown
\& in ascii(7) if unset rather in DOS-style (^A)
.Ve
.SH "AUTHOR"
.IX Header "AUTHOR"
bvi was developed by Gerhard Buergmann, Vienna, Austria
\fIGerhard.Buergmann@puon.at\fR
.SH "WWW"
.IX Header "WWW"
Bvi\ Homepage:\ \ http://bvi.sourceforge.net/
Vi\ Pages:\ \ \ \ \ \ http://www.guckes.net/vi/clones.php3
\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ (all\ about\ Vi\ and\ its\ clones)
.SH "FILES"
.IX Header "FILES"
\fI\ $HOME/.bvirc\fR\ \ \ \ \ \ \ \ \ \ editor\ startup\ file
\fI\ ./.bvirc\fR\ \ \ \ \ \ \ \ \ \ \ \ \ \ editor\ startup\ file
.SH "BUGS"
.IX Header "BUGS"
Bvi does not update the screen when the terminal changes its size.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\fIvi\fR\|(1), \fIstrings\fR\|(1), \fIascii\fR\|(5)
.rn }` ''
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