src/usr.bin/vis/vis.1 - diff

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Diff for /src/usr.bin/vis/vis.1 between version 1.5 and 1.6

version 1.5, 1999/06/05 01:21:49

version 1.6, 2000/03/14 14:58:25

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.Op Fl F Ar foldwidth

.Op Ar file ...

.Sh DESCRIPTION

.Nm vis

.Nm

is a filter for converting non-printable characters

into a visual representation. It differs from

into a visual representation.

.Ql cat -v

It differs from

.Ic cat -v

in that

the form is unique and invertible. By default, all non-graphic

the form is unique and invertible.

By default, all non-graphic

characters except space, tab, and newline are encoded.

A detailed description of the

various visual formats is given in

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.Bl -tag -width Ds

.It Fl b

Turns off prepending of backslash before up-arrow control sequences

and meta-characters, and disables the doubling of backslashes. This

and meta-characters, and disables the doubling of backslashes.

produces output which is neither invertible nor precise, but does

This produces output which is neither invertible nor precise, but does

represent a minimum of change to the input. It is similar to

represent a minimum of change to the input.

.Dq Li cat -v .

It is similar to

.Ic cat -v .

.It Fl c

Request a format which displays a small subset of the

non-printable characters using C-style backslash sequences.

.It Fl F

Causes

.Nm vis

.Nm

to fold output lines to foldwidth columns (default 80), like

.Xr fold 1 ,

except

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.Fl f

.Fl F

is selected. When combined with the

is selected.

When combined with the

.Fl f

flag,

.Nm vis

.Nm

becomes like

an invertible version of the

.Xr fold 1

utility. That is, the output

utility.

That is, the output

can be unfolded by running the output through

.Xr unvis 1 .

.It Fl o