UNIX_CHKPWD(8) Linux-PAM Manual UNIX_CHKPWD(8) NAME unix_chkpwd - helper binary that verifies the password of the current user SYNOPSIS /sbin/unix_chkpwd [username] DESCRIPTION unix_chkpwd is a helper program for the pam_unix module that verifies the password of the current user. It is not intended to be run directâ ly from the command line and logs a security violation if done so. It is typically installed setuid root or setgid shadow. OPTIONS unix_pwdchk optionally takes the following argument: username The username of the user whose password you want to check: this must match the current user id. INPUTS unix_pwdchk expects the following inputs via stdin: option Either nullok or nonull, depending on whether the user can have an empty password. password The password to verify. RETURN CODES unix_chkpwd has the following return codes: 1 unix_chkpwd was inappropriately called from the command line or the password is incorrect. 0 The password is correct. HISTORY Written by Andrew Morgan SEE ALSO pam(8) AUTHOR Emily Ratliff. Linux-PAM 0.76 2003-03-21 UNIX_CHKPWD(8)[top]
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