| | #!/bin/sh |
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| | # promptuser.sh - User Prompting From Shell With validation |
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| | # Copyright (c) 2010, TundraWare Inc, Des Plaines, IL USA |
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| | # All Rights Reserved |
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| | # $Id: tpromptuser.sh,v 1.103 2010/10/07 18:58:50 tundra Exp $ |
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| | |
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| | # Loop through a set of questions for the luser to answer, storing |
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| | # Loop through a set of questions for the user to answer, storing |
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| | # their response back into the prompt variable itself. |
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| | # |
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| | # This is convenient way to build answers to a set of configuration |
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| | # questions at the beginning of a script. |
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| |
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| | # specification of a default response and a list of legitimate |
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| | # single character answers to the prompt. If this list is empty, |
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| | # then any response to the prompt is accepted. |
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| | |
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| | # $Id: tpromptuser.sh,v 1.102 2010/10/07 18:34:13 tundra Exp $ |
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| | |
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| | ##### |
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| | # Constants |
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| | ##### |
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| | |
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| | # Separators |
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| | ORIGIFS=$IFS # Save current field separator |
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| | DL=':' # Prompt field delimeter |
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| | DL=';' # Prompt field delimiter |
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| | |
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| | # Common Answers |
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| | |
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| | YN="Y y N n Yes yes No no YES NO" |
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| | ##### |
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| | # Prompt Records |
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| | ##### |
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| | |
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| | # Layout Of Fields In Prompt Record: |
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| | # |
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| | # Prompt<delim>Default Response (If user just hits Enter)<delim>Legal Answers |
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| | # Prompt<delim>Default Response (If user just hits Enter)<delim>Legal Answers (space separated) |
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| | # Notes: |
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| | # |
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| | # 1) An empty Prompt field means there will be no prompt displayed |
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| | # |
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| | # 2) An empty Default Response field means that, if the user hits enter, |
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| | # the response is blank |
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| | # |
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| | # 3) An empty Legal Answers field mean the routine will accept *any* input |
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| | # |
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| | # 4) It's up to you to make sure the Default Response is a legit answer. |
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| | # It is NOT checked against the Legal Answers list. |
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| | |
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| | # Examples |
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| | foo="Would you like to foo?${DL}Y${DL}" # Empty last field means accept anything |
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| | bar="Would you like to bar?${DL}\!${DL}y Y n N" |
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| | baz="Would you like to baz?${DL}n${DL}yes Yes no No" |
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| | bat="Would you like to bat?${DL}${DL}yes Yes no No " |
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| | bar="Would you like to bar?${DL}\!${DL}${YN}" |
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| | baz="Would you like to baz?${DL}n${DL}${YN} yup" |
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| | bat="Would you like to bat?${DL}${DL}nope" |
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| | # Display the records for purposes of this example only |
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| | # We're done if the user took the default OR if the "Legal |
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| | # Answers" field is empty (which means we accept anything) |
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| | if [ _$ANS = _ ] || [ _"$answers" = _ ] |
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| | if [ _"$ANS" = _ ] || [ _"$answers" = _ ] |
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| | then |
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| | DONE=True |
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| | |
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| | # Otherwise, make sure answer is legit |
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| | else |
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| | for a in $answers # Check against each possible legal answer |
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| | do |
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| | if [ _$a = _$ANS ] |
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| | if [ _$a = _"$ANS" ] |
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| | then |
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| | DONE=True |
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| | fi |
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| | done |
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| | # Save the answer back into the original prompt variable, |
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| | # substituting the default value if the user entered nothing. |
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| | ANS=${ANS:-$default} |
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| | eval $x=\"$ANS\" |
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| | eval $x=\"$ANS\" |
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| | done |
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| | # End Of Prompting Logic |
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tundra
authored
on 7 Oct 2010