HPUtil::Prompt(3) User Contributed Perl Documentation HPUtil::Prompt(3)NAMEHPUtil::Prompt - Interactive questions
use HPUtil::Prompt qw(prompt yes enter);
The following functions are provided:
prompt( $question )
prompt( $question, $default )
prompt( $question, %opts )
This function will ask a question on the terminal and return the
answer given. The return value will always be defined.
Options can be passed in as key/value pairs. The following options
The "default" is returned if the user simply press return. The
default value is shown in brackets. If no default is provided then
no brackets are added to the question.
If "trim_space" is TRUE, then any leading and trailing space in the
anwer is trimmed off and any internal space is collapsed to a sin‐
The "must_match" value is used to validate answers. It can be
either a function, array or regular expression. If it is a func‐
tion, then the function is called with the answer given and should
return TRUE if it is to be accepted. If it is an array, then the
answer must be one of the values in the array. If it is an regular
expression then it must match it.
The "no_match_msg" is printed if the given answer does not validate
as specified in "must_match".
If "use_default" is TRUE, then no answer is read from the terminal
and the default is returned (or "" if there is no default). The
"use_default" is by default TRUE if the program is not running on a
terminal or if the PERL_MM_USE_DEFAULT environment variable is
The "silent" option works like "use_default" but it also prevent
the prompt text from being printed. This forces prompt() to return
the default without actually prompting.
yes( $question )
yes( $question, $default )
Will use the prompt function to ask a question and then return a
TRUE value if the answer was "yes" or "y".
The $default can either be a string like "yes", "y", "no" or "n",
or a boolean value in which case "yes" will be the default if TRUE
and "no" otherwise. If no $default is given it defaults to "no".
Ask the use to press some key before the function returns.
perl v5.8.8 2009-05-22 HPUtil::Prompt(3)