[PD] looking for a way to execute a program from pd

[Andrew Turley]

Wow, thanks. I didn't know about pdsend and pdreceive, I had always
just written my own network handling scripts and/or used netcat. Since
I don't need pd to deal with any of the program output this may be a
good avenue to explore.

andy

On Sat, Mar 22, 2008 at 1:49 PM, Claude Heiland-Allen
<claudiusmaximus at goto10.org> wrote:
> An alternative method that I like for asynchronous execution is:
>
>  [netsend]
>  [netreceive] -- optional, for knowing when the command has completed
>
>  and a bash script like:
>
>  #!/bin/bash
>  pdreceive ... |
>  while read line
>  do
>    somecommand "$LINE" >/dev/null
>    echo "done;" # optional
>  done |         # optional (pipe)
>  pdsend ...     # optional
>
>
>  pdsend and pdreceive are little tools provided with Pd to interact with
>  netsend and netreceive.
>
>  A concrete example:
>
>  ----8<----
>  #!/bin/bash
>  pdreceive 1570 |
>  while read line ; do
>      ppmhist -map <histogram-in.ppm >histogram-tmp.ppm
>      ppmtoppm <histogram-tmp.ppm >histogram-out.ppm
>      echo "ready ;"
>  done |
>  pdsend 1571
>  ----8<----
>
>  The Pd patch uses GridFlow to save histogram-in.ppm and sends "go" to
>  netsend, which executes one run through the loop, then when Pd
>  netreceive receives "ready", it loads histogram-out.ppm and carries on
>  processing - hopefully GridFlow will get histogram support soon, if it
>  doesn't already.
>
>
>  Claude
>
>
>  Andrew Turley wrote:
>  > It looks like that should work. Thanks.
>  >
>  > andy
>  >
>  > On Sat, Mar 22, 2008 at 12:43 PM, Hans-Christoph Steiner <hans at eds.org> wrote:
>  >>  [shell] and [popen] should work.
>  >>
>  >>  .hc
>  >>
>  >>
>  >>
>  >>  On Mar 22, 2008, at 2:09 PM, Andrew Turley wrote:
>  >>
>  >>  > Hey, I was wondering if there was a way to execute a program from pd.
>  >>  > Specifically, I would like to use the osascript command in Mac OS X to
>  >>  > send a command to iTunes.
>  >>  >
>  >>  > I can write an external to do this, but if there is already something
>  >>  > out there to do then then I will use that.
>  >>  >
>  >>  > andy
>  >>  >
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