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.\"  Copyright 1989 AT&T  Copyright (c) 1992, Sun Microsystems, Inc.  All Rights Reserved
.\" Portions Copyright (c) 2007 Gunnar Ritter, Freiburg i. Br., Germany
.\"
.\" Sccsid @(#)ckuid.1	1.5 (gritter) 3/4/07
.\"
.\" from OpenSolaris ckuid 1 "14 Sep 1992" "SunOS 5.11" "User Commands"
.TH CKUID 1 "3/4/07" "Heirloom Packaging Tools" "User Commands"
.SH NAME
ckuid, erruid, helpuid, valuid \- prompts for and validates a user ID
.SH SYNOPSIS
.HP
.ad l
.nh
\fBckuid\fR [\fB\-Q\fR] [\fB\-W\fR \fIwidth\fR] [\fB\-m\fR] [\fB\-d\fR \fIdefault\fR] [\fB\-h\fR \fIhelp\fR]
[\fB\-e\fR \fIerror\fR] [\fB\-p\fR \fIprompt\fR] [\fB\-k\fR \fIpid\fR [\fB\-s\fR \fIsignal\fR]]
.HP
.PD 0
.ad l
\fBerruid\fR [\fB\-W\fR \fIwidth\fR] [\fB\-e\fR \fIerror\fR]
.HP
.PD 0
.ad l
\fBhelpuid\fR [\fB\-W\fR \fIwidth\fR] [\fB\-m\fR] [\fB\-h\fR \fIhelp\fR]
.HP
.PD 0
.ad l
\fBvaluid\fR \fIinput\fR
.br
.PD
.ad b
.hy 1
.SH DESCRIPTION
The \fBckuid\fR utility prompts a user and validates the response.
It defines, among other things, a prompt message whose response should be an existing user \fBID,\fR text for help and error messages, and a default value (which are returned if the user responds with a RETURN).
.PP
All messages are limited in length to 70 characters and are formatted automatically.
Any white space used in the definition (including NEWLINE) is stripped.
The \fB\-W\fR option cancels the
automatic formatting.
When a tilde is placed at the beginning or end of a message definition, the default text is inserted at that point, allowing both custom text and the default text to be displayed.
.PP
If the prompt, help or error message is not defined, the default message (as defined under \fBNOTES\fR) is displayed.
.PP
Three visual tool modules are linked to the \fBckuid\fR command.
They are \fBerruid\fR (which formats and displays an error message), \fBhelpuid\fR (which formats
and displays a help message), and \fBvaluid\fR (which validates a response).
These modules should be used in conjunction with \fBFML\fR objects.
In this instance,
the \fBFML\fR object defines the prompt.
.PP
The following options and operands are supported:
.TP
\fB\-d\fR\fI default\fR
Defines the default value as \fIdefault\fR.
The default is not validated and so does not have to meet any criteria.
.TP
\fB\-e\fR \fIerror\fR
Defines the error message as \fIerror\fR.
.TP
\fB\-h\fR \fIhelp\fR
Defines the help messages as \fIhelp\fR.
.TP
\fB\-k\fR\fI pid\fR
Specifies that process \fBID\fR \fIpid\fR is to be sent a signal
if the user chooses to abort.
.TP
\fB\-m\fR
Displays a list of all logins when help is requested or when the user makes an error.
.TP
\fB\-p\fR\fI prompt\fR
Defines the prompt message as \fIprompt\fR.
.TP
\fB\-Q\fR
Specifies that quit will not be allowed as a valid response.
.TP
\fB\-s\fR \fIsignal\fR
Specifies that the process \fBID\fR \fIpid\fR defined with
the \fB\-k\fR option is to be sent signal \fIsignal\fR when quit is chosen.
If no signal is specified, SIGTERM is used.
.TP
\fB\-W\fR\fI width\fR
Specifies that prompt, help and error messages will be formatted to a line length of \fIwidth\fR.
.TP
\fB\fIinput\fR
Input to be verified against \fB/etc/passwd\fR.
.SH EXIT STATUS
.PD 0
The following exit values are returned:
.TP
.B 0
Successful execution.
.TP
.B 1
\fBEOF\fR on input, or negative width on \fB\-W\fR option, or usage error.
.TP
.B 2
Usage error.
.TP
.B 3
User termination (quit).
.PD
.SH NOTES
The default prompt for \fBckuid\fR is:
.PP
.in +2
.nf
Enter the login name of an existing user [?,q]:
.fi
.in -2
.PP
The default error message is:
.PP
.in +2
.nf
ERROR - Please enter the login name of an existing user.
.fi
.in -2
.PP
If the \fB\-m\fR option is used, the default error message is:
.PP
.in +2
.nf
ERROR: Please enter one of the following login names: <List>
.fi
.in -2
.PP
The default help message is:
.PP
.in +2
.nf
Please enter the login name of an existing user.
.fi
.in -2
.PP
If the \fB\-m\fR option is used, the default help message is:
.PP
.in +2
.nf
Please enter one of the following login names: <List>
.fi
.in -2
.PP
When the quit option is chosen (and allowed), \fBq\fR is returned along with the return code \fB3\fR.
The \fBvaluid\fR module will not produce any output.
It returns \fB0\fR for success and non-zero for failure.