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Stable CLI ABI
==============
If you want to call gocryptfs from your script or app, this is the
stable ABI.
General
-------
1. A password is piped into gocryptfs with an optional terminating
newline. Any unexpected data after the final newline will
cause gocryptfs to abort.
2. Always pass "--" after the options. This prevents a CIPERDIR that
starts with a dash ("-") to wreak havoc.
3. Use "-q" to get rid of all informational messages. Only error
messages (if any) will be printed to stderr (capture it!).
4. Check the exit code of gocryptfs. 0 is success, anything else is an
error and details about that error will have been printed to stderr.
Initialize Filesystem
---------------------
### Bash example
$ cat mypassword.txt | gocryptfs -init -q -- CIPHERDIR
Content of "mypassword.txt":
mypassword1234
### What you have to pipe to gocryptfs
1. Password
2. Optional newline
### Notes
1. The CIPHERDIR directory must exist and be empty
Mount
-----
### Bash example
$ cat mypassword.txt | gocryptfs -q -- CIPHERDIR MOUNTPOINT
### What you have to pipe to gocryptfs
Same as for "Initialize Filesystem".
### Notes
1. The MOUNTPOINT directory must exist and be empty.
Change Password
---------------
### Bash example
$ cat change.txt | gocryptfs -passwd -q -- CIPHERDIR
Content of "change.txt":
mypassword1234
newpassword9876
### What you have to pipe to gocryptfs
1. Old password
2. Newline
3. New password
4. Optional newline
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