The Linux mv command has, more or less, the following behavior

(taken from https://linux.die.net/man/1/mv) [I have simplified and modified]:

mv [OPTION]... SOURCE... DIRECTORY

mv [OPTION]... -t DIRECTORY SOURCE

mv SOURCEFILE DESTFILE

Rename SOURCEFILE to DESTFILE, or move SOURCE(s) to DIRECTORY.

Options:

-b[=CONTROLFILE]

make a backup of each existing destination file.

Take backup directives from stdin or from file CONTROLFILE which is optionally given

-f

(standing for force) do not prompt before overwriting

-i

(standing for interactive) prompt before overwrite

-n

(standing for no-clobber) do not overwrite an existing file

If you specify more than one of -i, -f, -n, only the final one takes effect. Default: -n

-t DIRECTORY

move all SOURCE arguments into DIRECTORY

-u

(standing for update) move only when the SOURCE file is newer than the destination file or when the destination file is missing

-h

display the following help and exit. Do not process any other options.

mv [OPTION]... SOURCEFILE... DIRECTORY

mv [OPTION]... -t DIRECTORY SOURCEFILE

mv SOURCEFILE DESTFILE

Rename SOURCEFILE to DESTFILE, or move SOURCEFILE(s) to DIRECTORY.

-b[=CONTROLFILE] make a backup of each existing destination file. Take backup

directives from stdin or from a file CONTROLFILE which is optionally given

-f do not prompt before overwriting

-i prompt before overwrite

-n do not overwrite an existing file.

If you specify more than one of -i, -f, -n, only the final one takes effect. Default: -n

-t DIRECTORY move all SOURCE arguments into DIRECTORY

-u move only when the SOURCE file is newer than the destination file or when

the destination file is missing

-h display help and exit

You are to write the option processing part of this command according to these specs. (You do not need to implement the actual command except for the -h option.) Your program should simply claim, (falsely, of course,) that it is doing so and so, according to the invoking options.

Invalid invocations should get a message:

mv: invalid usage

type mv -h for help

mv -h should display usage as above, overriding and ignoring any other options

Otherwise, the output from your program should be reprinting the command line as entered by the user and reporting the [alleged] behavior of the program in response to those options.

Examples:

input:

mv -b=ctrlFile -t file0 file1 file2 file3

output:

mv -b=ctrlFile -t file0 file1 file2 file3

moving files file1 file2 file3 to directory file0

control file ctrlFile

input:

mv -f -u file0 file1 file2 file3

output:

mv -f -u file0 file1 file2 file3

moving files file0 file1 file2 to directory file3

forcing unless later date

input:

mv -u -t drctry file1 file2 file3

output:

mv -u -t drctry file1 file2 file3

moving files file1 file2 file3 to directory drctry

unless later date

input:

mv -i file1 file2

output:

mv -i file1 file2

moving file1 to file2

interactive

input:

mv -n file1 file2

output:

mv -n file1 file2

moving file1 to file2

no-clobber

input:

mv file1 file2

output:

mv file1 file2

moving file1 to file2