DIFFMK(1) User Commands DIFFMK(1)
diffmk - mark differences between versions of a troff input file
diffmk oldfile newfile markedfile
diffmk compares two versions of a file and creates a third version
that includes "change mark" (.mc) commands for nroff(1) and troff(1).
oldfile and newfile are the old and new versions of the file. diffmk
generates markedfile, which, contains the text from newfile with
troff(1) "change mark" requests (.mc) inserted where newfile differs
from oldfile. When markedfile is formatted, changed or inserted text
is shown by | at the right margin of each line. The position of
deleted text is shown by a single *.
See largefile(7) for the description of the behavior of diffmk when
encountering files greater than or equal to 2 Gbyte ( 2^31 bytes).
diffmk can also be used in conjunction with the proper troff
requests to produce program listings with marked changes. In the
following command line:
example% diffmk old.c new.c marked.c ; nroff reqs marked.c | pr
the file reqs contains the following troff requests:
.pl 1
.ll 77
.nf
.eo
.nh
which eliminate page breaks, adjust the line length, set no-fill
mode, ignore escape characters, and turn off hyphenation,
respectively.
If the characters | and * are inappropriate, you might run
markedfile through sed(1) to globally change them.
diff(1), nroff(1), sed(1), troff(1), attributes(7), largefile(7)
Aesthetic considerations may dictate manual adjustment of some
output. File differences involving only formatting requests may
produce undesirable output, that is, replacing .sp by .sp 2 will
produce a "change mark" on the preceding or following line of output.
September 14, 1992 DIFFMK(1)
NAME
diffmk - mark differences between versions of a troff input file
SYNOPSIS
diffmk oldfile newfile markedfile
DESCRIPTION
diffmk compares two versions of a file and creates a third version
that includes "change mark" (.mc) commands for nroff(1) and troff(1).
oldfile and newfile are the old and new versions of the file. diffmk
generates markedfile, which, contains the text from newfile with
troff(1) "change mark" requests (.mc) inserted where newfile differs
from oldfile. When markedfile is formatted, changed or inserted text
is shown by | at the right margin of each line. The position of
deleted text is shown by a single *.
USAGE
See largefile(7) for the description of the behavior of diffmk when
encountering files greater than or equal to 2 Gbyte ( 2^31 bytes).
EXAMPLES
Example 1: An example of the diffmk command.
diffmk can also be used in conjunction with the proper troff
requests to produce program listings with marked changes. In the
following command line:
example% diffmk old.c new.c marked.c ; nroff reqs marked.c | pr
the file reqs contains the following troff requests:
.pl 1
.ll 77
.nf
.eo
.nh
which eliminate page breaks, adjust the line length, set no-fill
mode, ignore escape characters, and turn off hyphenation,
respectively.
If the characters | and * are inappropriate, you might run
markedfile through sed(1) to globally change them.
SEE ALSO
diff(1), nroff(1), sed(1), troff(1), attributes(7), largefile(7)
BUGS
Aesthetic considerations may dictate manual adjustment of some
output. File differences involving only formatting requests may
produce undesirable output, that is, replacing .sp by .sp 2 will
produce a "change mark" on the preceding or following line of output.
September 14, 1992 DIFFMK(1)