Script started on Sun Feb 09 21:51:46 2003
sh-2.05$ ./program1 output2 2 &
[1] 9497
sh-2.05$ 
SIGUSR1 received

SIGUSR1 received

Process 9498 cannot lock 'output2' for writing: in use by process -4196224

Process 9499 cannot lock 'output2' for writing: in use by process -4196224
./program1 started on Sun Feb  9 21:51:58 2003
, process ID 9497
SIGUSR1 received on Sun Feb  9 21:51:59 2003
, process ID 9497
SIGUSR1 received on Sun Feb  9 21:51:59 2003
, process ID 9497
./program1 started on Sun Feb  9 21:51:58 2003
, process ID 9497
SIGUSR1 received on Sun Feb  9 21:51:59 2003
, process ID 9497
SIGUSR1 received on Sun Feb  9 21:51:59 2003
, process ID 9497
jobs
[1]+  Done                    ./program1 output2 2
sh-2.05$ ./program1 output4 4 &
[1] 9502
sh-2.05$ 
SIGUSR1 received

SIGUSR1 received

SIGUSR1 received

SIGUSR1 received

Process 9505 cannot lock 'output4' for writing: in use by process -4196224

Process 9504 cannot lock 'output4' for writing: in use by process -4196224

Process 9506 cannot lock 'output4' for writing: in use by process -4196224

Process 9503 cannot lock 'output4' for writing: in use by process -4196224
./program1 started on Sun Feb  9 21:52:21 2003
, process ID 9502
SIGUSR1 received on Sun Feb  9 21:52:22 2003
, process ID 9502
SIGUSR1 received on Sun Feb  9 21:52:22 2003
, process ID 9502
SIGUSR1 received on Sun Feb  9 21:52:22 2003
, process ID 9502
SIGUSR1 received on Sun Feb  9 21:52:22 2003
, process ID 9502
./program1 started on Sun Feb  9 21:52:21 2003
, process ID 9502
SIGUSR1 received on Sun Feb  9 21:52:22 2003
, process ID 9502
SIGUSR1 received on Sun Feb  9 21:52:22 2003
, process ID 9502
SIGUSR1 received on Sun Feb  9 21:52:22 2003
, process ID 9502
SIGUSR1 received on Sun Feb  9 21:52:22 2003
, process ID 9502
./program1 started on Sun Feb  9 21:52:21 2003
, process ID 9502
SIGUSR1 received on Sun Feb  9 21:52:22 2003
, process ID 9502
SIGUSR1 received on Sun Feb  9 21:52:22 2003
, process ID 9502
SIGUSR1 received on Sun Feb  9 21:52:22 2003
, process ID 9502
SIGUSR1 received on Sun Feb  9 21:52:22 2003
, process ID 9502
./program1 started on Sun Feb  9 21:52:21 2003
, process ID 9502
SIGUSR1 received on Sun Feb  9 21:52:22 2003
, process ID 9502
SIGUSR1 received on Sun Feb  9 21:52:22 2003
, process ID 9502
SIGUSR1 received on Sun Feb  9 21:52:22 2003
, process ID 9502
SIGUSR1 received on Sun Feb  9 21:52:22 2003
, process ID 9502
jobs
[1]+  Done                    ./program1 output4 4
sh-2.05$ exit
exit

script done on Sun Feb 09 21:52:29 2003