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Adding pipeio, which is a tool that creates children which write to a pipe
while the parent reads everything off, checking for data errors.  I've included
8 command line examples in a new pan file.
TODO: Handle EAGAIN errors

# These tests use tests/pipeio to put pipes (named or unnamed) through a workout
#
pipeio_1 pipeio -c 5 -s 4090 -i 100 -b -f x80
# spawns 5 children to write 100 chunks of 4090 bytes to a named pipe 
# using blocking I/O
#pipeio_2 pipeio -c 5 -s 4090 -i 100 -f x80
# spawns 5 children to write 100 chunks of 4090 bytes to a named pipe 
# using non-blocking I/O
# This test hits EAGAIN, which pipeio doesn't handle at the moment
pipeio_3 pipeio -c 5 -s 4090 -i 100 -u -b -f x80
# spawns 5 children to write 100 chunks of 4090 bytes to an unnamed pipe 
# using blocking I/O
pipeio_4 pipeio -c 5 -s 4090 -i 100 -u -f x80
# spawns 5 children to write 100 chunks of 4090 bytes to an unnamed pipe 
# using non-blocking I/O
pipeio_5 pipeio -c 5 -s 5000 -i 10 -b -f x80
# spawns 5 children to write 10 chunks of 5000 bytes to a named pipe 
# using blocking I/O
pipeio_6 pipeio -c 5 -s 5000 -i 10 -b -u -f x80
# spawns 5 children to write 10 chunks of 5000 bytes to an unnamed pipe 
# using blocking I/O
#pipeio_7 pipeio -c 5 -s 5000 -i 10 -f x80
# spawns 5 children to write 10 chunks of 5000 bytes to a named pipe 
# using non-blocking I/O
# This test hits EAGAIN, which pipeio doesn't handle at the moment
pipeio_8 pipeio -c 5 -s 5000 -i 10 -u -f x80
# spawns 5 children to write 10 chunks of 5000 bytes to an unnamed pipe 
# using non-blocking I/O