ckuid(1) USER COMMANDS ckuid(1)
NAME
ckuid - prompts for and validates a user ID
SYNOPSIS
ckuid [-Q] [-W width] [-m] [-d default] [-h help] [-e error]
[-p prompt]
[-k pid [-s signal]]
erruid [-W] [-e error]
helpuid [-W] [-m] [-h help]
valuid input
DESCRIPTION
ckuid prompts a user and validates the response. It
defines, among other things, a prompt message whose response
should be an existing user ID, text for help and error mes-
sages, and a default value (which will be returned if the
user responds with a carriage return). 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 -W option cancels the
automatic formatting. When a tilde is placed at the begin-
ning or end of a message definition, the default text will
be inserted at that point, allowing both custom text and the
default text to be displayed. If the prompt, help or error
message is not defined, the default message (as defined
under NOTES) will be displayed. Three visual tool modules
are linked to the ckuid command. They are erruid (which
formats and displays an error message), helpuid (which for-
mats and displays a help message), and valuid (which vali-
dates a response). These modules should be used in conjunc-
tion with FML objects. In this instance, the FML object
defines the prompt. The options and arguments for this com-
mand are:
-Q Specifies that quit will not be allowed as a valid
response.
-W Specifies that prompt, help and error messages will be
formatted to a line length of width.
-m Displays a list of all logins when help is requested or
when the user makes an error.
-d Defines the default value as default. The default is
not validated and so does not have to meet any cri-
teria.
-h Defines the help messages as help.
-e Defines the error message as error.
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ckuid(1) USER COMMANDS ckuid(1)
-p Defines the prompt message as prompt.
-k Specifies that process ID pid is to be sent a signal if
the user chooses to abort.
-s Specifies that the process ID pid defined with the -k
option is to be sent signal signal when quit is chosen.
If no signal is specified, SIGTERM is used.
input
Input to be verified against /etc/passwd.
EXIT CODES
0 = Successful execution
1 = EOF on input
2 = Usage error
3 = User termination (quit)
NOTES
The default prompt for ckuid is:
Enter the login name of an existing user [?,q]:
The default error message is:
ERROR - Please enter the login name of an existing user.
Select the help option (?) for a list of valid login names.
(Last line appears only if the -m option of ckuid is used)
The default help message is:
Please enter the login name of an existing user.
(If the -m option of ckuid is used, a list of valid groups
is also displayed.)
When the quit option is chosen (and allowed), q is returned
along with the return code 3. The valuid module will not pro-
duce any output. It returns zero for success and non-zero for
failure.
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