shell - Need to give option Y or N in DCL scripting -


my requirement -- need give 2 options(yes or no) users. whenever user enters other y or n system should throw error. created below piece of code, not giving expected output.

$ y:== y $ n:== n $ alpha: $ inquire option "y or n" $ define/nolog report_file 'option' $       if f$type (option) .eqs. "integer" $       $                   esc[0,7] = 27 $                   text = "numeric values not accepted !!" $                   write sys$output   "''esc'[5m''text'''esc'[m" $               wait 0:0:0.15 $               set term/width=132 $               goto alpha $       endif $ if 'option' .nes. y  $ $                 esc[0,7] = 27 $                 text = "enter "y" or "n"" $                 write sys$output   "''esc'[5m''text'''esc'[m" $ endif $ if 'option' .nes. n $ $                  esc[0,7] = 27 $                  text = "enter "y" or "n"" $                  write sys$output   "''esc'[5m''text'''esc'[m" $ endif
  • output :

whenever try give interger values running designed.. when trying enter a,b,c etc other y or n, giving below warning.

aksh - $-> @test.com y or n: k %dcl-w-undsym, undefined symbol - check validity , spelling \k\ %dcl-w-undsym, undefined symbol - check validity , spelling \k\ %dcl-w-undsym, undefined symbol - check validity , spelling \k\

any suggestions on ??

hmmm, seems me need un-quote string compare variable , and quote fixed string values:

bad: if 'option' .nes. y good: if option .nes. "y"

some folks goof: if "''option'" .nes. "y" ! show value option when run set verify

free advice...

1) never assign values before verifying: - define/nolog report_file 'option' ---> move bottom of script after validation ---> use "''option'" if ever want accept spaces in option answer (not case)

2) little nicer users - consider using f$extract first character of option allows "yes" (and "yeah!") - use f$edit uppercase before comparing. - consider using f$loc find option in list of acceptable values "yynn"

try this:

$ y:== y $ n:== n $ esc[0,7] = 27 $alpha: $ inquire option "y or n" $ if option .nes. y .and. option .nes. n $ $     text =  "enter ""y"" or ""n""" $     write sys$output   esc + "[5m" + text + esc + "[m" $     goto alpha $ endif $ define/nolog report_file 'option'

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