Да вот его help
$ bar -h
Usage: bar [-n] [-p] [-q] [-o FILE] [-c CMD] [-s SIZE] [-b SIZE]
[-w WIDTH] [-0/1/[/] CHAR] [-d DIR] [-e EXT] [Files]
bar -V
bar -D
bar -D-
Options:
-h displays help
-o FILE sets output file
-c CMD sets individual execution command
-e EXT append an extension to each file
-d DIR prepend this prefix to each file (a directory must end in /)
-s SIZE expected number of bytes. Use for pipes. This is a hint
only that must be greater or equal to the amount actually
processed. Further, this only works for single files.
-b SIZE maximal block size (bytes) (default: 1048567)
-w WIDTH width in characters (default: terminal width-3 or 76)
-0 CHAR character for empty bar (default: .)
-1 CHAR character for full bar (default: =)
-[ CHAR first character of bar (default: [)
-] CHAR last character of bar (default: ])
-n clears bar after termination
-t traces (=displays) which file is processed
-T WIDTH no of characters reserved for the file display of -t
-p hides percentage
-E hides estimated time display
-q hides the whole bar, be quiet
-D tries to dump the bar_cat() shell function, then exit.
Here, -t, -p, -E remove the corresponding feature completely.
Further, -L removes large file support from the code.
-D- same as -D, but dumps the function body only
-V displays version number
-- end of options: only file names follow