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OpenSolaris 2009.06 - man page for valstr (opensolaris section 1)

ckstr(1)				  User Commands 				 ckstr(1)

       ckstr, errstr, helpstr, valstr - display a prompt; verify and return a string answer

       ckstr [-Q] [-W width] [ [-r regexp] [...]] [-l length]
	    [-d default] [-h help] [-e error] [-p prompt]
	    [-k pid [- s signal]]

       /usr/sadm/bin/errstr [-W width] [-e error] [-l length]
	    [ [-r regexp] [...]]

       /usr/sadm/bin/helpstr [-W width] [-h help] [-l length]
	    [ [-r regexp] [...]]

       /usr/sadm/bin/valstr [-l length] [ [-r regexp] [...]] input

       The  ckstr  utility  prompts  a	user  and validates the response. It defines, among other
       things, a prompt message whose response should be a string, text for help and  error  mes-
       sages, and a default value (which are returned if the user responds with a RETURN).

       The  answer returned from this command must match the defined regular expression and be no
       longer than the length specified. If no regular expression is given, valid input must be a
       string with a length less than or equal to the length defined with no internal, leading or
       trailing white space. If no length is defined, the length is not checked.

       All messages are limited in length to 79 characters and are formatted automatically.  Tabs
       and newlines are removed after a single white space character in a message definition, but
       spaces are not removed. When a tilde is placed at the beginning or end of a message  defi-
       nition, 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
       EXAMPLES) is displayed.

       Three  visual tool modules are linked to the ckstr command. They are errstr (which formats
       and displays an error message on the standard output), helpstr (which formats and displays
       a help message on the standard output), and valstr (which validates a response).

       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 message as  help.

       -k pid	     Specifies that process ID pid is to be sent a signal if the user chooses  to

       -l length     Specifies the maximum length of the input.

       -p prompt     Defines the prompt message as prompt.

       -Q	     Specifies that quit will not be allowed as a valid response.

       -r regexp     Specifies	a  regular expression,	regexp, against which the input should be
		     validated. May include white space. If multiple expressions are defined, the
		     answer need match only one of them.

       -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

       -W width      Specifies	that  prompt, help and error messages will be formatted to a line
		     length of width.

       The following operand is supported:

       input	Input to be verified against format length and/or regular expression criteria.

       Example 1 Default prompt

       The default prompt for ckstr is:

	 example% ckstr
	 Enter an appropriate value [?,q]:

       Example 2 Default error message

       The default error message is dependent upon the type of validation involved. The user will
       be  told  either that the length or the pattern matching failed. The default error message

	 example% /usr/sadm/bin/errstr
	 ERROR: Please enter a string which contains no embedded,
	 leading or trailing spaces or tabs.

       Example 3 Default help message

       The default help message is also dependent upon the type of  validation	involved.   If	a
       regular expression has been defined, the message is:

	 example% /usr/sadm/bin/helpstr -r regexp
	 Please enter a string which matches the following pattern:

       Other messages define the length requirement and the definition of a string.

       Example 4 Using the quit option

       When  the quit option is chosen (and allowed), q is returned along with the return code 3.
       Quit input gets a trailing newline.

       Example 5 Using the valstr module

       The valstr module will produce a usage message on stderr. It returns  0	for  success  and
       non-zero for failure.

	 example% /usr/sadm/bin/valstr
	 usage: valstr [-l length] [[-r regexp] [...]] input

       The following exit values are returned:

       0    Successful execution.

       1    EOF on input, or negative width on	-W option,  or usage error.

       2    Invalid regular expression.

       3    User termination (quit).

       See attributes(5) for descriptions of the following attributes:

       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       |Availability		     |SUNWcsu			   |

       signal.h(3HEAD), attributes(5)

SunOS 5.11				   14 Sep 1992					 ckstr(1)

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