all error messages will be written into the file Petra.err or errorfile if given instead of STDOUT.
all information about the performed run will be written into the file Petra.log or logfile if given instead of STDOUT.
Pipe mode selector. This option flags PETRA to be used in a pipe.
-pi specifies input pipe mode: petra should read its input file from stdin.
-po stands for output pipe mode: petra writes its Cleartext output to stdout.
-pc indicates complete pipe mode, combining input and output pipe mode. In output pipe mode petra flushes the buffer after each ensemble.