Very Computer

I would like to have 2 sources of stdin for a script.  I would like both
keyboard input OR FIFO input to control the same stdin pipe.  For stdout,
one can use tee to connect stdout to 2 locations.  Is there a method like
this for stdin?

 - Matt

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  AIX and HACMP Certified Specialist   | |  / \ |\| |  \. ,_|  ` o O '
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Hmm... 'tee' is a separate process which duplicates
standard output to another file. I suppose you could
write a C program to listen on both stdin and a FIFO,
but then you must answer the question of how you merge
the 2 streams -- line by line? Character by character?
Which ever comes first (and how do you determine that)?

(cat FIFO & cat; wait) | script

                --Ken Pizzini

Excellent!  Thank you very much.  However, for my situation one little
change needed to be made to keep the FIFO pipe open to the input, else
it would only pass the first chunk sent to the FIFO... tail -f FIFO
instead of cat FIFO.  Once that change was made I had consistent control
over both inputs... Keyboard, AND echo "<command>" >> FIFO.

 - Matt

--

  AIX and HACMP Certified Specialist   | |  / \ |\| |  \. ,_|  ` o O '
  / Comments, views, and opinions \    | |_/ ^ \|   | ) | |       x    
  \ are mine alone, not IBM's.    /    |___|/~\_\_|\|__/|_|     \___/

Since it is a FIFO file, and you don't want EOF to end the
reading of it, a cheaper way than using "tail -f" is:
   (cat FIFO 3<FIFO & exec cat) | script

                --Ken Pizzini

Quote:>Since it is a FIFO file, and you don't want EOF to end the
>reading of it, a cheaper way than using "tail -f" is:
>   (cat FIFO 3<FIFO & exec cat) | script

Bah!  That should read:
    (cat FIFO 3>FIFO & exec cat) | script

                --Ken Pizzini