ptx(1)ptx(1)Nameptx - create permuted index
Syntaxptx [option...] [input[output]]
Description
The command generates a permuted index to file input on file output
(standard input and output default). It has three phases: the first
does the permutation, generating one line for each keyword in an input
line. The keyword is rotated to the front. The permuted file is then
sorted. Finally, the sorted lines are rotated so the keyword comes at
the middle of the page. The command produces output in the form:
.xx "tail" "before keyword" "keyword and after" "head"
where .xx may be an or macro for user-defined formatting. The before
keyword and keyword and after fields incorporate as much of the line as
fits around the keyword when it is printed at the middle of the page.
The and commands, at least one of which is an empty string "", are
wrapped-around pieces small enough to fit in the unused space at the
opposite end of the line. When original text must be discarded, `/'
marks the spot.
Options
The following options can be applied:
-b break Use the characters in the break file as separators.
In any case, tab, new line, and space characters
are always used as break characters.
-f Folds upper and lower case letters for sorting.
-g n Uses specified number as interfield gap. The
default gap is 3 characters.
-i ignore Do not use as keywords any words given in the
ignore file. If the -i and -o options are missing,
use /usr/lib/eign as the ignore file.
-o only Use words listed only in the only file.
-r Uses leading nonblanks as reference identifiers.
Attach that identifier as a 5th field on each out‐
put line.
-t Prepares the output for the phototypesetter. The
default line length is 100 characters.
-w n Use the next argument, n, as the width of the out‐
put line. The default line length is 72 charac‐
ters.
Restrictions
Line length counts do not account for overstriking or proportional
spacing.
Files
/usr/bin/sort
/usr/lib/eign
ptx(1)
