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Shell Programming and Scripting
Using read to prompt for editable user input in Bash 3
Post 302736541 by woodson2 on Tuesday 27th of November 2012 12:33:47 PM
11-27-2012
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LEARN ABOUT OPENSOLARIS
ckuid
ckuid(1) User Commands ckuid(1) NAME
ckuid, erruid, helpuid, valuid - 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]] /usr/sadm/bin/erruid [-W width] [-e error] /usr/sadm/bin/helpuid [-W width] [-m] [-h help] /usr/sadm/bin/valuid input DESCRIPTION
The ckuid utility 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 messages, and a default value (which are returned if the user responds with a RETURN). All messages are limited in length to 70 characters and are formatted automatically. Any white space used in the definition (including NEW- LINE) is stripped. The -W 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. If the prompt, help or error message is not defined, the default message (as defined under NOTES) is displayed. Three visual tool modules are linked to the ckuid command. They are erruid (which formats and displays an error message), helpuid (which formats and displays a help message), and valuid (which validates a response). These modules should be used in conjunction with FML objects. In this instance, the FML object defines the prompt. OPTIONS
The following options are supported: -d default Defines the default value as default. The default is not validated and so does not have to meet any criteria. -e error Defines the error message as error. -h help Defines the help messages as help. -k pid Specifies that process ID pid is to be sent a signal if the user chooses to abort. -m Displays a list of all logins when help is requested or when the user makes an error. -p prompt Defines the prompt message as prompt. -Q Specifies that quit will not be allowed as a valid response. -s signal 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. -W width Specifies that prompt, help and error messages will be formatted to a line length of width. OPERANDS
The following operand is supported: input Input to be verified against /etc/passwd. EXIT STATUS
The following exit values are returned: 0 Successful execution. 1 EOF on input, or negative width on -W option, or usage error. 2 Usage error. 3 User termination (quit). ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
attributes(5) 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. If the -m option is used, the default error message is: ERROR: Please enter one of the following login names: <List> The default help message is: Please enter the login name of an existing user. If the -m option is used, the default help message is: Please enter one of the following login names: <List> When the quit option is chosen (and allowed), q is returned along with the return code 3. The valuid module will not produce any output. It returns 0 for success and non-zero for failure. SunOS 5.11 14 Sep 1992 ckuid(1)