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April, 26th. 2006:
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PAM_SETCRED
Section: Linux-PAM Manual (3) Updated: 04/01/2016 Index
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NAME
pam_setcred - establish / delete user credentials
SYNOPSIS
#include <security/pam_appl.h>
-
int pam_setcred(pam_handle_t *pamh, int flags);
DESCRIPTION
The
pam_setcred
function is used to establish, maintain and delete the credentials of a user. It should be called to set the credentials after a user has been authenticated and before a session is opened for the user (with
pam_open_session(3)). The credentials should be deleted after the session has been closed (with
pam_close_session(3)).
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_close_session(3),
pam_strerror(3)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUES
-
- SEE ALSO
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