Партнёры:
Хостинг:
ckrange, errange, helprange, valrange - prompts for and validates an integer
ckrange [-Q] [-W width] [-l lower] [-u upper] [-b base]
[-d default] [-h help] [-e error] [-p prompt]
[-k pid [-s signal]]
/usr/sadm/bin/errange [-W width] [-e error] [-l lower]
[-u upper] [-b base]
/usr/sadm/bin/helprange [-W width] [-h help] [-l lower]
[-u upper] [-b base]
/usr/sadm/bin/valrange [-l lower] [-u upper] [-b base] input
The ckrange utility prompts a user for an integer between a specified range and determines whether this response is valid. It defines, among other things, a prompt message whose response should be an integer in the range specified, text for help and error messages, and a default value (which is returned if the user responds with a RETURN).
This command also defines a range for valid input. If either the lower or upper limit is left undefined, then the range is bounded on only one end.
All messages are limited in length to 79 characters and are formatted automatically. Tabs and newlines are removed after a single whitespace character in a message definition, but spaces are not removed. When a tilde is placed at the beginning 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 EXAMPLES) is displayed.
Three visual tool modules are linked to the ckrange command. They are errange (which formats and displays an error message on the standard output), helprange (which formats and displays a help message on the standard output), and valrange (which validates a response).
Note: Negative "input" arguments confuse getopt in valrange. By inserting a "-" before the argument, getopt processing will stop. See getopt(1) and Intro(1) about getopt parameter handling. getopt is used to parse positional parameters and to check for legal options.
The following options are supported:
-b base
-d default
-e error
-h help
-k pid
-l lower
-p prompt
-Q
-s signal
-u upper
-W width
The following operand is supported:
input
Example 1 Default base 10 prompt
The default base 10 prompt for ckrange is:
example% ckrange Enter an integer between lower_bound and upper_bound [lower_bound-upper_bound,?,q]:
Example 2 Default base 10 error message
The default base 10 error message is:
example% /usr/sadm/bin/errange
ERROR: Please enter an integer between lower_bound \
and upper_bound.
Example 3 Default base 10 help message
The default base 10 help message is:
example% /usr/sadm/bin/helprange Please enter an integer between lower_bound and upper_bound.
Example 4 Changing messages for a base other than 10
The messages are changed from ``integer'' to ``base base integer'' if the base is set to a number other than 10. For example,
example% /usr/sadm/bin/helprange -b 36
Example 5 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 6 Using the valrange module
The valrange module will produce a usage message on stderr. It returns 0 for success and non-zero for failure.
example% /usr/sadm/bin/valrange usage: valrange [-l lower] [-u upper] [-b base] input
The following exit values are returned:
0
1
2
3
See attributes(5) for descriptions of the following attributes:
| ||||||
Intro(1), getopt(1), strtol(3C), attributes(5), signal.h(3HEAD)
|
Закладки на сайте Проследить за страницей |
Created 1996-2024 by Maxim Chirkov Добавить, Поддержать, Вебмастеру |