1PAM_CHAUTHTOK(3)               Linux-PAM Manual               PAM_CHAUTHTOK(3)
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NAME

6       pam_chauthtok - updating authentication tokens
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SYNOPSIS

9       #include <security/pam_appl.h>
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11       int pam_chauthtok(pam_handle_t *pamh, int flags);
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DESCRIPTION

14       The pam_chauthtok function is used to change the authentication token
15       for a given user (as indicated by the state associated with the handle
16       pamh).
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18       The pamh argument is an authentication handle obtained by a prior call
19       to pam_start(). The flags argument is the binary or of zero or more of
20       the following values:
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22       PAM_SILENT
23           Do not emit any messages.
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25       PAM_CHANGE_EXPIRED_AUTHTOK
26           This argument indicates to the modules that the user's
27           authentication token (password) should only be changed if it has
28           expired. If this argument is not passed, the application requires
29           that all authentication tokens are to be changed.
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RETURN VALUES

32       PAM_AUTHTOK_ERR
33           A module was unable to obtain the new authentication token.
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35       PAM_AUTHTOK_RECOVERY_ERR
36           A module was unable to obtain the old authentication token.
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38       PAM_AUTHTOK_LOCK_BUSY
39           One or more of the modules was unable to change the authentication
40           token since it is currently locked.
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42       PAM_AUTHTOK_DISABLE_AGING
43           Authentication token aging has been disabled for at least one of
44           the modules.
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46       PAM_PERM_DENIED
47           Permission denied.
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49       PAM_SUCCESS
50           The authentication token was successfully updated.
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52       PAM_TRY_AGAIN
53           Not all of the modules were in a position to update the
54           authentication token(s). In such a case none of the user's
55           authentication tokens are updated.
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57       PAM_USER_UNKNOWN
58           User unknown to password service.
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SEE ALSO

61       pam_start(3), pam_authenticate(3), pam_setcred(3), pam_get_item(3),
62       pam_strerror(3), pam(8)
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66Linux-PAM Manual                  09/03/2021                  PAM_CHAUTHTOK(3)
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