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PAM_AUTHENTICATE(3) App. Programmers' Manual PAM_AUTHENTICATE(3)
pam_authenticate - authenticate a user
int pam_authenticate(pam_handle_t *pamh, int flags);
Use this function to authenticate an applicant user. It is linked dynamically to the
authentication modules by Linux-PAM. It is the task of these module to perform such an
authentication. The specific nature of the authentication is not the concern of the
Following successful completion, the name of the authenticated user will be present in the
Linux-PAM item PAM_USER. This item may be recovered with a call to pam_get_item(3).
The application developer should note that the modules may request that the user enter
their username via the conversation mechanism (see pam_start(3)). Should this be the
case, the user-prompt string can be set via the PAM_USER_PROMPT item (see
On success PAM_SUCCESS is returned. All other returns should be considered authentication
failures and will be delayed by an amount specified with prior calls to pam_fail_delay(3).
Specific failures that demand special attention are the following:
the application should exit immediately. Of course, pam_end(3) should be called
the application has tried too many times to authenticate the user, authentication
should not be attempted again.
May be translated to text with pam_strerror(3).
DCE-RFC 86.0, October 1995.
pam_start(3), pam_get_item(3) pam_fail_delay(3) and pam_strerror(3).
Also, see the three Linux-PAM Guides, for System administrators, module developers, and
Linux-PAM 0.55 1996 Dec 9 PAM_AUTHENTICATE(3)
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