Specs

Exit codes

Description	Exit status	Note
Exit successfully	0
Undefined or General errors	1
ID or password is undefined	3
Invalid option/argument	4
Nothing has been copied yet.	5
Given passwords on the initial screen do not match.	6
Failed to decode something.	7	i.e, Invalid ID or password
Failed to encode something.	8	`openssl` got something wrong. i.e, `openssl`'s version is too old.
Failed to upload the content.	16	transfer.sh might be down.
Failed to get the content url.	17	cl1p.net might be down.
Credentials are initialized on the initial screen.	124	Actually it is not error. "124" sounds like "initi" in japanese btw.
Necessary commands are not found	127	http://stackoverflow.com/questions/1763156/127-return-code-from
Terminated by Ctl-C	130	Type Ctrl-c.