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Shell Programming and Scripting

Giveing input for BACKGROUND process

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# 1  
Old 09-04-2004
Giveing input for BACKGROUND process
hai

i want to run some of my programs in background for that i require to redirect my output and errors i got those two but i am unable to give the input to that background process

so please help me if anybody know the answer for my problem
# 2  
Old 09-06-2004
If the processes are shell script you can use SIGNAL to trigger an action. Use the TRAP command on the script to trap signal and use the KILL command to send signal (I think signal 16 and 17 are generally reserved signals for user defined)
See man pages of signal, trap and kill.
Hope these helps.
# 3  
Old 09-06-2004
The simplest option is to just pipe-in the input, e.g...
Code:
 (
    echo Y
    echo N
 ) | your_prog > logfile &

Alternatively, use a co-process: from man ksh...
Quote:
The symbol |& causes asynchronous execution of the preceding command or pipeline with a two-way pipe established to the parent shell (known as a co-process). The standard input and output of the spawned command can be written to and read from by the parent shell using the -p option of the special commands read and print.
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