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Full Discussion: Read input and output redirection filename within a script
Top Forums Shell Programming and Scripting Read input and output redirection filename within a script Post 302454489 by hedonist12 on Saturday 18th of September 2010 02:25:39 PM
Old 09-18-2010
Thanks for the replies. Ok. So the requirement is, I need to write a shell script such that it builds the parameter list with which it was invoked including any input or/and output redirection files, if any. So let's say a.sh is invoked as "sh a.sh arg1 arg2 < inp.dat", it should be able to build this argument list and store it in an usable variable or write it to another file. The contents being simply the invocation line - "sh a.sh arg1 arg2 < inp.dat". If say its invoked as "sh a.sh arg1 arg2", (the simplest case), it should be able to write this invocation line ("sh a.sh arg1 arg2") into a file.
Lets assume that we always want the "output" in another file. So, if the script is invoked as "sh a.sh arg1 arg2 < inp.dat > out.log", let it produce a file result.txt with contents "sh a.sh arg1 arg2 < inp.dat > out.log".
Hope am clear this time. I can understand the requirement is kind of weird!
Thanks again.

---------- Post updated at 01:25 PM ---------- Previous update was at 01:20 PM ----------

Missed adding in the last post that my only challenge it is to "read" the input and output redirection file name within the script. Otherwise, its simply looping through the parameter list. Pardon my ignorance!
 

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service

service(8)						      System Manager's Manual							service(8)

NAME

       service - run a System V init script

SYNOPSIS

       service SCRIPT COMMAND [OPTIONS]

       service --status-all

       service --help | -h | --version

DESCRIPTION

       service runs a System V init script in as predictable environment as possible, removing most environment variables and with current working
       directory set to /.

       The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT.  The  supported  values  of  COMMAND  depend  on  the
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EXIT CODES

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FILES

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	      The directory containing System V init scripts.

ENVIRONMENT

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SEE ALSO

       /etc/init.d/skeleton,
       update-rc.d(8),
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