Dynamically generated PIPEs

data _null_;
   command = 'nslookup 207.255.105.92';
   infile ns1 pipe filevar=command end=eod1;
   do until (eod1);
      input;
      put '(1) ' _infile_;
   end;
   command = 'nslookup 207.255.105.93';
   infile ns2 pipe filevar=command end=eod2;
   do until (eod2);
      input;
      put '(2) ' _infile_;
   end;
   stop;
run;

data _null_;
   do command = 'nslookup 207.255.105.92', 'nslookup 207.255.105.93';
      eod = 0;
      infile nslookup pipe filevar=command end=eod;
      do until (eod);
         input;
         put command ':' _infile_;
      end;
   end;
   stop;
run;

prints

332  data _null_;
333     command = 'nslookup 207.255.105.92';
334     infile ns1 pipe filevar=command end=eod1;
335     do until (eod1);
336        input;
337        put '(1) ' _infile_;
338     end;
339     command = 'nslookup 207.255.105.93';
340     infile ns2 pipe filevar=command end=eod2;
341     do until (eod2);
342        input;
343        put '(2) ' _infile_;
344     end;
345     stop;
346  run;

NOTE: The infile NS1 is:
      Unnamed Pipe Access Device,
      PROCESS=nslookup 207.255.105.92,RECFM=V,
      LRECL=256

(1) Server:  spoke.dcn.davis.ca.us
(1) Address:  168.150.253.2
(1)
(1) Name:    207-255-105-092-dhcp.unt.pa.atlanticbb.net
(1) Address:  207.255.105.92
(1)
NOTE: The infile NS2 is:
      Unnamed Pipe Access Device,
      PROCESS=nslookup 207.255.105.93,RECFM=V,
      LRECL=256

(2) Server:  spoke.dcn.davis.ca.us
(2) Address:  168.150.253.2
(2)
(2) Name:    207-255-105-093-dhcp.unt.pa.atlanticbb.net
(2) Address:  207.255.105.93
(2)
NOTE: 6 records were read from the infile NS1.
      The minimum record length was 0.
      The maximum record length was 51.
NOTE: 6 records were read from the infile NS2.
      The minimum record length was 0.
      The maximum record length was 51.
NOTE: DATA statement used (Total process time):
      real time           0.75 seconds
      cpu time            0.01 seconds


347
348  data _null_;
349     do command = 'nslookup 207.255.105.92', 'nslookup 207.255.105.93';
350        eod = 0;
351        infile nslookup pipe filevar=command end=eod;
352        do until (eod);
353           input;
354           put command ':' _infile_;
355        end;
356     end;
357     stop;
358  run;

NOTE: The infile NSLOOKUP is:
      Unnamed Pipe Access Device,
      PROCESS=nslookup 207.255.105.92,RECFM=V,
      LRECL=256

nslookup 207.255.105.92 :Server:  spoke.dcn.davis.ca.us
nslookup 207.255.105.92 :Address:  168.150.253.2
nslookup 207.255.105.92 :
nslookup 207.255.105.92 :Name:    207-255-105-092-dhcp.unt.pa.atlanticbb.net
nslookup 207.255.105.92 :Address:  207.255.105.92
nslookup 207.255.105.92 :
NOTE: The infile NSLOOKUP is:
      Unnamed Pipe Access Device,
      PROCESS=nslookup 207.255.105.93,RECFM=V,
      LRECL=256

nslookup 207.255.105.93 :Server:  spoke.dcn.davis.ca.us
nslookup 207.255.105.93 :Address:  168.150.253.2
nslookup 207.255.105.93 :
nslookup 207.255.105.93 :Name:    207-255-105-093-dhcp.unt.pa.atlanticbb.net
nslookup 207.255.105.93 :Address:  207.255.105.93
nslookup 207.255.105.93 :
NOTE: 6 records were read from the infile NSLOOKUP.
      The minimum record length was 0.
      The maximum record length was 51.
NOTE: 6 records were read from the infile NSLOOKUP.
      The minimum record length was 0.
      The maximum record length was 51.
NOTE: DATA statement used (Total process time):
      real time           0.75 seconds
      cpu time            0.03 seconds