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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | COLOPHON |
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PAM_CHAUTHTOK(3) Linux-PAM Manual PAM_CHAUTHTOK(3)
pam_chauthtok - updating authentication tokens
#include <security/pam_appl.h>
int pam_chauthtok(pam_handle_t *pamh, int flags);
The pam_chauthtok function is used to change the authentication
token for a given user (as indicated by the state associated with
the handle pamh).
The pamh argument is an authentication handle obtained by a prior
call to pam_start(). The flags argument is the binary or of zero
or more of the following values:
PAM_SILENT
Do not emit any messages.
PAM_CHANGE_EXPIRED_AUTHTOK
This argument indicates to the modules that the user's
authentication token (password) should only be changed if it
has expired. If this argument is not passed, the application
requires that all authentication tokens are to be changed.
PAM_AUTHTOK_ERR
A module was unable to obtain the new authentication token.
PAM_AUTHTOK_RECOVERY_ERR
A module was unable to obtain the old authentication token.
PAM_AUTHTOK_LOCK_BUSY
One or more of the modules was unable to change the
authentication token since it is currently locked.
PAM_AUTHTOK_DISABLE_AGING
Authentication token aging has been disabled for at least one
of the modules.
PAM_PERM_DENIED
Permission denied.
PAM_SUCCESS
The authentication token was successfully updated.
PAM_TRY_AGAIN
Not all of the modules were in a position to update the
authentication token(s). In such a case none of the user's
authentication tokens are updated.
PAM_USER_UNKNOWN
User unknown to password service.
pam_start(3), pam_authenticate(3), pam_setcred(3),
pam_get_item(3), pam_strerror(3), pam(8)
This page is part of the linux-pam (Pluggable Authentication
Modules for Linux) project. Information about the project can be
found at ⟨http://www.linux-pam.org/⟩. If you have a bug report
for this manual page, see ⟨//www.linux-pam.org/⟩. This page was
obtained from the project's upstream Git repository
⟨https://github.com/linux-pam/linux-pam.git⟩ on 2023-12-22. (At
that time, the date of the most recent commit that was found in
the repository was 2023-12-18.) If you discover any rendering
problems in this HTML version of the page, or you believe there is
a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
Linux-PAM Manual 12/22/2023 PAM_CHAUTHTOK(3)
Pages that refer to this page: pam(3), pam_acct_mgmt(3), pam_authenticate(3), pam_sm_chauthtok(3), pam_filter(8)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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