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Manual Reference Pages  - UNIX_CHKPWD (8)

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unix_chkpwd - helper binary that verifies the password of the current user

CONTENTS

Author

/sbin/unix_chkpwd [username]

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 directly from the command line and logs a security violation if done so.

It is typically installed setuid root or setgid shadow.

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.

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.

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.

Written by Andrew Morgan

pam(8)

Emily Ratliff.

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