Dviselect selects pages from a DVI file produced by TeX,
creating a new DVI file
usable by any of the TeX conversion programs,
or even by
range is a string of the form
first:last where both
last are optional numeric strings, with negative numbers indicated by
a leading underscore character _. If both
last are omitted, the colon may also be omitted, or may be replaced
with an asterisk *. A
page range is a list of ranges separated by periods. A
list of pages is described by a set of page ranges separated by commas and/or white space.
Dviselect actually looks at the ten
count variables that TeX writes; the first of these (\count0) is the
page number, with \count1 through \count9 having varied uses
depending on which macro packages are in use. (Typically \count1
might be a chapter or section number.) A page is included in
dviselects output if all its \count values match any one of the ranges
listed on the command line. For example, the command
might select everything in chapter 1, as well as pages 35 and up.
dviselect 10:30 would select pages 10 through 30 (inclusive).
:43 means everything up to and including page 43 (including
To get all even-numbered pages, use even;
to get all odd-numbered pages, use odd.
If a Table of Contents has negative page numbers, :_1 will select it.
Note that * must be quoted from the shell;
the empty string is more convenient to use, if harder to read.
Instead of \count values,
dviselect can also select by absolute page number, where the first page
is page 1, the second page 2, and so forth. Absolute page numbers
are indicated by a leading equal sign =. Ranges of absolute
pages are also allowed: dviselect =3:7 will extract the third
through seventh pages. Dot separators are not legal in absolute
ranges, and there are no negative absolute page numbers.
Even/odd specifiers, however, are legal;
dviselect =even selects every other page,
starting with the second.
More precisely, an asterisk or an empty string implies no limit;
an equal sign means absolute page number rather than \counts;
a leading colon means everything up to and including the given page; a
trailing colon means everything from the given page on;
the word even means only even values shall be accepted;
the word odd means only odd values shall be accepted; and
a period indicates that the next \count should be examined.
If fewer than 10 ranges are specified, the remaining \counts
are left unrestricted (that is, 1:5 and 1:5.* are equivalent).
A single number n is treated as if it were the range n:n.
An arbitrary number of page selectors may be given, separated by commas
or whitespace; a page is selected if any of the selectors matches
its \counts or absolute page number.
Dviselect normally prints the page numbers of the pages selected; the
-s option suppresses this.
A leading - ought to be allowed for negative numbers, but it
is currently used as a synonym for :, for backwards compatibility.
Section or subsection selection will sometimes fail, for the DVI
file lists only the \count values that were active when the page
ended. Clever macro packages can alleviate this by making use of
other free \count registers. Chapters normally begin on new
pages, and do not suffer from this particular problem.
The heuristic that decides which arguments are page selectors
and which are file names is often wrong.
Using shell redirection or the -i and -o options is safest.
Dviselect does not adjust the parameters in the postamble; however, since these
values are normally used only to size certain structures in the output
conversion programs, and the parameters never need to be adjusted upward,
this has not proven to be a problem.