CKRANGE(1)CKRANGE(1)NAME
ckrange, errange, helprange, valrange - prompts for and validates an
integer
SYNOPSIS
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
DESCRIPTION
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 mes‐
sage (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.
OPTIONS
The following options are supported:
-b base
Defines the base for input. Must be 2 to 36, default is
10. Base conversion uses strtol(3C). Output is always
base 10.
-d default
Defines the default value as default. default is con‐
verted using strtol(3C) in the desired base. Any charac‐
ters invalid in the specified base will terminate the
strtol conversion without error.
-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 quit.
-l lower
Defines the lower limit of the range as lower. Default is
the machine's largest negative long.
-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.
-u upper
Defines the upper limit of the range as upper. Default is
the machine's largest positive long.
-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 upper and lower limits and base.
EXAMPLES
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
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).
SEE ALSOIntro(1), getopt(1), strtol(3C), attributes(5), signal.h(3HEAD)
Nov 4, 2005 CKRANGE(1)
