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-.\" Copyright (C) 2003 International Business Machines Corporation
-.\" This file is distributed according to the GNU General Public License.
-.\" See the file COPYING in the top level source directory for details.
-.\"
-.de Sh \" Subsection
-.br
-.if t .Sp
-.ne 5
-.PP
-\fB\\$1\fR
-.PP
-..
-.de Sp \" Vertical space (when we can't use .PP)
-.if t .sp .5v
-.if n .sp
-..
-.de Ip \" List item
-.br
-.ie \\n(.$>=3 .ne \\$3
-.el .ne 3
-.IP "\\$1" \\$2
-..
-.TH "UNIX_CHKPWD" 8 "2003-03-21" "Linux-PAM 0.76" "Linux-PAM Manual"
-.SH NAME
-unix_chkpwd \- helper binary that verifies the password of the current user
-.SH "SYNOPSIS"
-.ad l
-.hy 0
-
-/sbin/unix_chkpwd [\fIusername\fR]
-.sp
-.ad
-.hy
-.SH "DESCRIPTION"
-.PP
-\fBunix_chkpwd\fR 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.
-
-.SH "OPTIONS"
-.PP
-unix_pwdchk optionally takes the following argument:
-.TP
-\fIusername\fR
-The username of the user whose password you want to check: this must match the current user id.
-
-.SH "INPUTS"
-.PP
-unix_pwdchk expects the following inputs via stdin:
-.TP
-\fIoption\fR
-Either nullok or nonull, depending on whether the user can have an empty password.
-.TP
-\fIpassword\fR
-The password to verify.
-
-.SH "RETURN CODES"
-.PP
-\fBunix_chkpwd\fR has the following return codes:
-.TP
-1
-unix_chkpwd was inappropriately called from the command line or the password is incorrect.
-
-.TP
-0
-The password is correct.
-
-.SH "HISTORY"
-Written by Andrew Morgan
-
-.SH "SEE ALSO"
-
-.PP
-\fBpam\fR(8)
-
-.SH AUTHOR
-Emily Ratliff.
-