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Annotation of hatari/tools/hatari-local-rs232.sh, revision 1.1.1.1

1.1       root        1: #!/bin/sh
                      2: #
                      3: # Start two Hatari instances connected through emulated rs232 connection.
                      4: # Given arguments (if any) are passed to the invoked Hatari instances.
                      5: # Their rs232 connection goes through shared local fifo file.
                      6: 
                      7: # open fifos
                      8: for i in 1 2; do
                      9:        mkfifo rs232-$i
                     10: done
                     11: 
                     12: # pass all args to the Hatari instances
                     13: hatari="hatari $*"
                     14: 
                     15: # connect the Hatari instances with fifos
                     16: echo "$hatari --rs232-in rs232-1 --rs232-out rs232-2 &"
                     17: $hatari --rs232-in rs232-1 --rs232-out rs232-2 &
                     18: echo "$hatari --rs232-in rs232-2 --rs232-out rs232-1 &"
                     19: $hatari --rs232-in rs232-2 --rs232-out rs232-1 &
                     20: 
                     21: # Without this Hataris would deadlock as fifos
                     22: # block the process until both ends are opened.
                     23: # Hatari opens rs232 output first (for writing),
                     24: # so this needs to read it.
                     25: catpids=""
                     26: cat rs232-2 >/dev/null &
                     27: catpids="$catpids $!"
                     28: cat rs232-1 >/dev/null &
                     29: catpids="$catpids $!"
                     30: 
                     31: # after connections are open, fifo files can be removed
                     32: sleep 2
                     33: for i in 1 2; do
                     34:        rm rs232-$i
                     35: done
                     36: # as can the 'cat' processes
                     37: kill -9 $catpids

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