A credential is something that the user possesses. It is some property, such as a Kerberos ticket, or a supplementary group membership that make up the uniqueness of a given user. On a Linux system the user's UID and GID's are credentials too. However, it has been decided that these properties (along with the default supplementary groups of which the user is a member) are credentials that should be set directly by the application and not by PAM. Such credentials should be established, by the application, prior to a call to this function. For example, initgroups(2) (or equivalent) should have been performed.
Valid flags, any one of which, may be logically OR'd with PAM_SILENT, are:
- PAM_ESTABLISH_CRED
- Initialize the credentials for the user.
- PAM_DELETE_CRED
- Delete the user's credentials.
- PAM_REINITIALIZE_CRED
- Fully reinitialize the user's credentials.
- PAM_REFRESH_CRED
- Extend the lifetime of the existing credentials.
RETURN VALUES
- PAM_BUF_ERR
- Memory buffer error.
- PAM_CRED_ERR
- Failed to set user credentials.
- PAM_CRED_EXPIRED
- User credentials are expired.
- PAM_CRED_UNAVAIL
- Failed to retrieve user credentials.
- PAM_SUCCESS
- Data was successful stored.
- PAM_SYSTEM_ERR
- A NULL pointer was submitted as PAM handle, the function was called by a module or another system error occured.
- PAM_USER_UNKNOWN
- User is not known to an authentication module.
SEE ALSO
pam_authenticate(3), pam_open_session(3), pam_strerror(3)
Index
- NAME
- SYNOPSIS
- DESCRIPTION
- RETURN VALUES
- SEE ALSO
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