linux - looping through dates in hp unix via arthmatic operations -


Hello I am using HP Unix, I'm trying to loop through the last 20 days (current date In relation to) loop for one For 

 , do the day ($ c = 1; c & lt; = 5; c ++) $ c = $ (perl -e 'use pOSIX; print strftime "% Y % M% D \ n ", local time-86400 * $ c; ') afterwards do some action with some $$ c   
, the issue is that some strange reasons 86400 * $ c is not being executed, can anyone point to the mistake? Thanks in advance.   
 
 
 Try different quotes:  
  day $ c = $ (Perl-e "use POSIX; print striptime cueq ( % Y% m% d \ n), local time-86400 * $ c; ")   
 (I'm not familiar with HPUX, but it seems that  $ c  is not being interpolated by Shell.)  
 Edit: Or slightly smaller:  
  day $ c = $ (perl-MPOSIX -le) "Print strokefire '% Y% m% d', local time-86400 * $ c;")

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