I wanna run a program 'program', with 'input.dat' as input data, and
output 'output.dat'

1, named pipe
$ mkfifo fifo
$ cat input.dat > fifo
$ program fifo -output output.dat

2, unnamed pipe
cat < input.dat | xargs program -output output.dat

- so do they both work? and give same result?
- what if the 'program' cannot read input from stdin?

Thanks


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