$ fileobj --help
usage:
fileobj [options]... [paths]...
fileobj [options]... [paths[@offset:length]]...
fileobj [options]... [paths[@offset-(offset+length)]]...
options:
-h, --help show this help message and exit
-R Use read-only mode.
-B Use Python bytes based buffer for regular files. This
option is required to insert or delete bytes on some
platforms.
-o [<number_of_windows>]
Initially assign buffers given by paths to
horizontally splitted windows. When
<number_of_windows> is omitted, assign one window for
each buffer.
-O [<number_of_windows>]
Initially assign buffers given by paths to vertically
splitted windows. When <number_of_windows> is omitted,
assign one window for each buffer.
--bytes_per_line <bytes_per_line>, --bpl <bytes_per_line>
Set number of bytes printed per line. Each line prints
<bytes_per_line> bytes. Available formats for
<bytes_per_line> are digit, "max", "min" and "auto".
"auto" sets the value to the maximum 2^N that fits in
the terminal width. Defaults to "auto".
--bytes_per_window <bytes_per_window>, --bpw <bytes_per_window>
Set number of bytes printed per window. Each window
prints <bytes_per_window> bytes, using the current
number of bytes per line. Available formats for
<bytes_per_window> are digit, "even" and "auto".
"even" sets all windows to have the same size.
Defaults to "auto".
--bytes_per_unit <bytes_per_unit>, --bpu <bytes_per_unit>
Set number of bytes printed per unit. Each unit prints
<bytes_per_unit> bytes. Defaults to "1".
--no_text Disable text window.
--no_mouse Disable mouse events.
--no_color Disable color for buffer contents.
--force Ignore warnings which can be ignored.
--verbose Enable verbose mode.
--test_screen Enter ncurses(3) screen test mode.
--test_mouse Enter ncurses(3) mouse test mode.
--test_color Enter ncurses(3) color test mode.
--list_color Print list of available screen colors and exit.
"r:g:b" format is printed if a terminal supports it.
--env Print list of environment variables and exit.
--command Print list of editor commands and exit. Also see
:help.
--sitepkg Print python(1) site-package directory and exit.
--md [<hash_algorithm>]
Print message digest of files using <hash_algorithm>
and exit. Defaults to "sha256".
--blkcmp Compare contents of files and exit.
--blkdump [<dump_type>]
Print contents of files to stdout and exit. Available
options are "text" and "raw". Defaults to "text". If
multiple files are specified, this command assumes a
single concatenated file. To handle them separately,
append "x" to option string (e.g. "textx").
--blkscan [<scan_type>]
Print file offsets of matched logical blocks and exit.
Available options are "zero", "nonzero", "ff",
"nonff", "<hash_algorithm>:<value>" and
"<hash_algorithm>". Defaults to "zero". If multiple
files are specified, this command assumes a single
concatenated file. To handle them separately, append
"x" to option string (e.g. "zerox").
--lsblk Print list of block devices and exit. This prints
character devices on some platforms.
--version show program's version number and exit