# fscrypt setup creates fscrypt.conf
Defaulting to policy_version 2 because kernel supports it.
Customizing passphrase hashing difficulty for this system...
Created global config file at "FSCRYPT_CONF".
Skipping creating MNT_ROOT/.fscrypt because it already exists.

# fscrypt setup creates fscrypt.conf and /.fscrypt
Defaulting to policy_version 2 because kernel supports it.
Customizing passphrase hashing difficulty for this system...
Created global config file at "FSCRYPT_CONF".
Metadata directories created at "MNT_ROOT/.fscrypt".

# fscrypt setup when fscrypt.conf already exists (cancel)
Replace "FSCRYPT_CONF"? [y/N] [ERROR] fscrypt setup: operation canceled

# fscrypt setup when fscrypt.conf already exists (cancel 2)
Replace "FSCRYPT_CONF"? [y/N] [ERROR] fscrypt setup: operation canceled

# fscrypt setup when fscrypt.conf already exists (accept)
Replace "FSCRYPT_CONF"? [y/N] Defaulting to policy_version 2 because kernel supports it.
Customizing passphrase hashing difficulty for this system...
Created global config file at "FSCRYPT_CONF".
Skipping creating MNT_ROOT/.fscrypt because it already exists.

# fscrypt setup --quiet when fscrypt.conf already exists
[ERROR] fscrypt setup: operation would be destructive

Use --force to automatically run destructive operations.

# fscrypt setup --quiet --force when fscrypt.conf already exists

# fscrypt setup filesystem
Metadata directories created at "MNT/.fscrypt".

# fscrypt setup filesystem (already set up)
[ERROR] fscrypt setup: filesystem MNT: already setup for use
                       with fscrypt

# no config file
[ERROR] fscrypt setup: "FSCRYPT_CONF" doesn't exist

Run "sudo fscrypt setup" to create this file.

# bad config file
[ERROR] fscrypt setup: "FSCRYPT_CONF" is invalid: invalid
                       character 'b' looking for beginning of value

Either fix this file manually, or run "sudo fscrypt setup" to recreate it.