diff options
Diffstat (limited to 'usr.bin/vis/vis.1')
| -rw-r--r-- | usr.bin/vis/vis.1 | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/usr.bin/vis/vis.1 b/usr.bin/vis/vis.1 index a1207800d0cb..704a8c758854 100644 --- a/usr.bin/vis/vis.1 +++ b/usr.bin/vis/vis.1 @@ -47,10 +47,12 @@ The .Nm utility is a filter for converting non-printable characters -into a visual representation. It differs from +into a visual representation. +It differs from .Ql 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 @@ -60,9 +62,11 @@ The options are as follows: .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. +This produces output which is neither invertible or precise, but does -represent a minimum of change to the input. It is similar to +represent a minimum of change to the input. +It is similar to .Dq Li cat -v . .It Fl c Request a format which displays a small subset of the @@ -94,14 +98,16 @@ still doubled and hidden newline sequences inserted if .Fl f or .Fl F -is selected. When combined with the +is selected. +When combined with the .Fl f flag, .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 |