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Top Forums UNIX for Dummies Questions & Answers queue items... Post 302444074 by agama on Tuesday 10th of August 2010 11:29:24 PM
Old 08-11-2010
You've hit the nail straight on -- a simple script would be perfect. Not only does it allow you the freedom to run one command to accomplish several tasks, its easy to repeat the process if that is needed.

Excuse me if you know this, but on the off chance that you dont....
Edit a file with vi, or similar editor, add your commands in the order you desire, and save the file. You'll need to make the file executable, and once that is done you can run your script.

Code:
#!/usr/env/bin/ bash
set -e
command1 input-file >file1
command2 <file1 >file2
command3 <file2 >output

To make it executable, use the chmod command (assuming the filename is myscript.bash):

Code:
chmod 755 myscript.bash

Then you can run it by typing 'myscript.bash' on the command line.

The 'set -e' command causes the script to exit immediately on error; prevents command2 and command3 from being executed if command1 fails. You can do your own error checking, and maybe recovery, but the 'set -e' is the easiest. If these commands are long running, I like having an echo message in the script letting me know what is currently running:

Code:
#!/usr/env/bin/ bash
set -e
echo "$(date) starting c1" >&2
command1 input-file >file1
echo "$(date) starting c2" >&2
command2 <file1 >file2
echo "$(date) starting c3" >&2
command3 <file2 >output
echo "$(date) script complete"

These 2 Users Gave Thanks to agama For This Post:
hobiwhenuknowme Jay-pea
 

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LEARN ABOUT SUNOS

gst-complete-0.8

gst-complete-0.8(1)						   User Commands					       gst-complete-0.8(1)

NAME

       gst-complete-0.8, gst-complete - perform bash completion for gst-launch command lines

SYNOPSIS

       complete -Cgst-complete-0.8 gst-launch

       gst-complete [--gst-list-mm] [--gst-mm=string] [--print]

DESCRIPTION

       gst-complete-0.8 enables bash to provide context-sensitive tab completion for gst-launch command lines. See gst-launch(1) for the syntax of
       gst-launch command lines.

       You must have a version of bash that supports programmable completion. Such versions of bash provide the complete built-in command.

       gst-complete is a wrapper script that runs the latest installed version of gst-complete-X.X. For example, if both gst-complete-0.7 and gst-
       complete-0.8 are installed on your system, gst-complete runs gst-complete-0.8.

OPTIONS

       The following options are supported by gst-complete-0.8 and gst-complete:

       --help	       Display detailed usage message. You can also use -? to specify this option.

       The following options are supported by gst-complete only:

       --gst-list-mm   List found major/minor versions. This option displays the versions that are available.

       --gst-mm=string Force  major/minor  version.  This  option  enables you to specify a specific version to run, if you do not want to run the
		       default version.

       --print	       Print wrapped command line. This option displays the command that will be run, and then runs the command.

EXAMPLES

       Example 1: Generating the Registry of Available Plugins by Running gst-compprep

       Run the following command in your .bash_profile or other appropriate place:

       example% complete -C gst-complete-0.8 gst-launch

       Example 2: Running the Wrapper Script and Displaying the Command Name

       example% gst-complete --print
       /usr/bin/gst-complete-0.8

FILES

       The following files are used by this application:

       /usr/bin/gst-complete-0.Executable for bash completion for gst-launch

       /usr/bin/gst-complete   Wrapper script that runs the latest installed version of gst-complete-X.X

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWgnome-media		   |
       +-----------------------------+-----------------------------+
       |Interface stability	     |External			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       gst-compprep(1), gst-feedback(1), gst-inspect(1), gst-launch(1), gst-launch-ext(1), gst-md5sum(1), gst-register(1), gst-thumbnail(1),  gst-
       typefind(1), gst-xmlinspect(1), gst-xmllaunch(1), gstreamer-properties(1), libgstreamer-0.8(3), libgstgetbits(3)

NOTES

       Original man page written by the GStreamer team at http://gstreamer.net/.

       Updated by Brian Cameron, Sun Microsystems Inc., 2004.

SunOS 5.10							    14 Oct 2004 					       gst-complete-0.8(1)
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