(Video materials in preparation)
ismime : Checks if a file is in MIME formant
Usage : ismime <file>
Version : Tue Nov 29 09:01:24 JST 2022
Edition : 1
This command exits normally if <file> is in MIME format, otherwise
it exits with an error (exit status 1).
$ ismime mime-file
$ echo $?
0
$ ismime no-mime-file
$ echo $?
1
ismime checks if the "boundary" in MIME format is the standard
format.