It does nothing Post: 24456

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Top Forums Shell Programming and Scripting It does nothing Post 24456 by peter.herlihy on Thursday 11th of July 2002 07:26:43 PM

07-11-2002

Registered User

If you have multiple CD* files ie CD1, CD2 CD3...and you want to make this substitution for all instances (which I guess you do from your question)... then you should use a for loop. you can do this from a script or a command line. I'd suggest script so that you can run it again...or modify it for later use.

#!/usr/bin/ksh

for files in /u1/walter/CD*
do
sed -e 's/D/walter/g' $files > temp_file
mv temp_file $files
done

This will take each file in the /u1/walter directory that starts with CD make the substitution to the file and direct the output to a file called temp_file. It will then rename the temp_file to be the origianl filename.

To allow execution change the permissions on the file using chmod 755 ask. Then run as you have tried with ./ask

Hope this helps. (the -e syntax is probably optional in the sed command if you are only using one substitution).

peter.herlihy

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platform::shell

platform::shell(n)					       Tcl Bundled Packages						platform::shell(n)

__________________________________________________________________________________________________________________________________________________

NAME

       platform::shell - System identification support code and utilities

SYNOPSIS

       package require platform::shell ?1.1.4?

       platform::shell::generic shell
       platform::shell::identify shell
       platform::shell::platform shell
_________________________________________________________________

DESCRIPTION

       The platform::shell package provides several utility commands useful for the identification of the architecture of a specific Tcl shell.

       This  package  allows the identification of the architecture of a specific Tcl shell different from the shell running the package. The only
       requirement is that the other shell (identified by its path), is actually executable on the current machine.

       While for most platform this means that the architecture of the interrogated shell is identical to the architecture of  the  running  shell
       this  is  not generally true. A counter example are all platforms which have 32 and 64 bit variants and where a 64bit system is able to run
       32bit code. For these running and interrogated shell may have different 32/64 bit settings and thus different identifiers.

       For applications like a code repository it is important to identify the architecture of the shell which will  actually  run  the  installed
       packages, versus the architecture of the shell running the repository software.

COMMANDS

       platform::shell::identify shell
	      This command does the same identification as platform::identify, for the specified Tcl shell, in contrast to the running shell.

       platform::shell::generic shell
	      This command does the same identification as platform::generic, for the specified Tcl shell, in contrast to the running shell.

       platform::shell::platform shell
	      This command returns the contents of tcl_platform(platform) for the specified Tcl shell.

KEYWORDS

       operating system, cpu architecture, platform, architecture

platform::shell 						       1.1.4							platform::shell(n)