gwb4proc: test and exit if Bilmax21 wb4 is already running...
WB4PROCS=[    root 24465 16225  0   Sep-03 ttyp1        01:00:00 sh ./wb4 01/04/2012 30/04/2012 STIME ETIME ALL all 1
bilmax21 18161 18152  0   Sep-05 ttyp1        01:00:00 time wb4 01/05/2012 31/05/2012 STIME ETIME ALL all 1
bilmax21 18152 24516  0   Sep-05 ttyp1        01:00:00 sh ./twb4
    root 16208 16180  0   Sep-03 ttyp1        01:00:00 sh ./wb4 01/04/2012 30/04/2012 STIME ETIME ALL all 1
    root 24472 24465  0   Sep-03 ttyp1        01:00:00 sh ./wb4 01/04/2012 30/04/2012 STIME ETIME ALL all 1
    root 16180     1  0   Sep-03 ttyp1        01:00:00 sh ./wb4 01/04/2012 30/04/2012 STIME ETIME ALL all 1
    root 16212 16208  0   Sep-03 ttyp1        01:00:00 sh ./wb4 01/04/2012 30/04/2012 STIME ETIME ALL all 1
    root 16225 16212  0   Sep-03 ttyp1        01:00:00 sh ./wb4 01/04/2012 30/04/2012 STIME ETIME ALL all 1
bilmax21 18162 18161  0   Sep-05 ttyp1        01:00:00 sh ./wb4 01/05/2012 31/05/2012 STIME ETIME ALL all 1
bilmax21 19061 18162  0   Sep-06 ttyp1    001-12:25:01 awk -f wb4.awk -v MMYYYY=052012 -vsdate=01/05/2012 -vedate=31/05/2012 -v logdir]
wb4 is running