Fix error code in is_assigned

[frankdavid]

The C function crypt_token_is_assigned returns -ENOENT when the token is unassigned.

[packit-as-a-service]

Congratulations! One of the builds has completed. 🍾

You can install the built RPMs by following these steps:

• sudo dnf install -y 'dnf*-command(copr)'
• dnf copr enable packit/stratis-storage-libcryptsetup-rs-483
• And now you can install the packages.

Please note that the RPMs should be used only in a testing environment.

[packit-as-a-service]

Congratulations! One of the builds has completed. 🍾

You can install the built RPMs by following these steps:

• sudo dnf install -y 'dnf*-command(copr)'
• dnf copr enable packit/stratis-storage-libcryptsetup-rs-483
• And now you can install the packages.

Please note that the RPMs should be used only in a testing environment.

[jbaublitz]

I'm a little confused by this PR.

Here's what I found:

/**
 * Get info about token assignment to particular keyslot.
 *
 * @param cd crypt device handle
 * @param token token id
 * @param keyslot keyslot
 *
 * @return @e 0 on success (token exists and is assigned to the keyslot),
 *	   -ENOENT if token is not assigned to a keyslot (token, keyslot
 *	   or both may be inactive) or other negative errno value otherwise.
 */

so the value should be negative. Based on libc docs this value is positive so the negative would need to be included in the comparison. Otherwise libcryptsetup would return -ENOENT (negative) which would be compared to libc::ENOENT (positive).

[jbaublitz]

Wow I have not had enough coffee today. I read the left as the change and not the current state of things. This is correct. I'll merge this.