%macro doeveryminute() ;
%do %while ( %sysevalf(%sysfunc(time())<'21:56:08't,boolean) ) ;
*do something ;
data _null_;
dt=today(); format dt yymmdd10.;
curr_datetime=datetime(); format curr_datetime datetime20.;
put dt ;
put curr_datetime;
run;
%*Sleep until 5 seconds after the start of the next minute ;
%put %sysfunc(wakeup("%sysfunc(putn(%eval(%sysfunc(intnx(minute,"%sysfunc( time(), time )"t,1))+5),time.))"t));
%end ;
%mend ;
%doeveryminute()
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