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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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LEARN ABOUT OSX

osacompile

OSACOMPILE(1)						    BSD General Commands Manual 					     OSACOMPILE(1)

NAME

     osacompile -- compile AppleScripts and other OSA language scripts

SYNOPSIS

     osacompile [-l language] [-e command] [-o name] [-d] [-r type:id] [-t type] [-c creator] [-x] [-s] [-u] [-a arch] [file ...]

DESCRIPTION

     osacompile compiles the given files, or standard input if none are listed, into a single output script.  Files may be plain text or other
     compiled scripts.	The options are as follows:

     -l language
	   Override the language for any plain text files.  Normally, plain text files are compiled as AppleScript.

     -e command
	   Enter one line of a script.	Script commands given via -e are prepended to the normal source, if any.  Multiple -e options may be given
	   to build up a multi-line script.  Because most scripts use characters that are special to many shell programs (e.g., AppleScript uses
	   single and double quote marks, ``('', ``)'', and ``*''), the command will have to be correctly quoted and escaped to get it past the
	   shell intact.

     -o name
	   Place the output in the file name.  If -o is not specified, the resulting script is placed in the file ``a.scpt''.  The value of -o
	   partly determines the output file format; see below.

     -x    Save the resulting script as execute-only.

     The following options are only relevant when creating a new bundled applet or droplet:

     -s    Stay-open applet.

     -u    Use startup screen.

     -a arch
	   Create the applet or droplet for the specified target architecture arch.  The allowable values are ``ppc'', ``i386'', and ``x86_64''.
	   The default is to create a universal binary.

     The following options control the packaging of the output file.  You should only need them for compatibility with classic Mac OS or for cus-
     tom file formats.

     -d    Place the resulting script in the data fork of the output file.  This is the default.

     -r type:id
	   Place the resulting script in the resource fork of the output file, in the specified resource.

     -t type
	   Set the output file type to type, where type is a four-character code.  If this option is not specified, the creator code will not be
	   set.

     -c creator
	   Set the output file creator to creator, where creator is a four-character code.  If this option is not specified, the creator code will
	   not be set.

     If no options are specified, osacompile produces a Mac OS X format script file: data fork only, with no type or creator code.

     If the -o option is specified and the file does not already exist, osacompile uses the filename extension to determine what type of file to
     create.  If the filename ends with ``.app'', it creates a bundled applet or droplet.  If the filename ends with ``.scptd'', it creates a bun-
     dled compiled script.  Otherwise, it creates a flat file with the script data placed according to the values of the -d and -r options.

EXAMPLES

     To produce a script compatible with classic Mac OS:

	   osacompile -r scpt:128 -t osas -c ToyS example.applescript

SEE ALSO

     osascript(1), osalang(1)

Mac OS X							 November 12, 2008							  Mac OS X
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