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Full Discussion: Setting Environment variable from value in file
Top Forums Shell Programming and Scripting Setting Environment variable from value in file Post 302401303 by WolfBrother on Friday 5th of March 2010 12:36:29 PM
Old 03-05-2010
Quote:
Originally Posted by methyl
What shell do you use (ksh, bash, sh ... whatever) ?
What are the names and example values of the three environment variables?

The sourcing using dot-space-scriptname advised above is the correct method.

Korn Shell. 1 environment variable - 3 possible values at this time.

File names and value's
1mo - XFG1moDR
2mo - XFG2mo
3mo - XFG3mo.

The environment variable in one of the korn shell scripts needing one of the three values depending on the backup requirements:
NB_ORA_SCHED.

I'm wanting to read/source/bring in the value of one the 3 files.
As in
whatever it takes to get 1mo value into a variable in the shell and then:
export NB_ORA_SCHED=<shell variable>

I have 17 Oracle instances on a very large server,
each instance with it's own backup script.

9 uses the value in 3mo, 6 uses the value in 2mo, and 2 uses the value in 1mo as the value for the environment variable NB_ORA_SCHED.

Over the past few years - as the process changes - these values have changed. SO rather than manually editing 17 scripts to change the value, I'm wanting to edit 1 of 3 files as needed.

Again, these scripts are parameterized to some degree within the script. However, they are written so that if my backup, my backup's backup, my backup's backup's backup, and I get hit with a bus, any DBA can be given access to the server and will be able to manually (if needed) submit the backup without having to know anything other than
1. log on to server
2. go to this place
3. manually submit this .ksh script.

The plan is to make it as simple as it should be but no simpler.

As a note. Above, when I mentioned the process, you need to understand the way its done here. We have any number of pointy headed managers who feel the need to do something managerish fairly frequently. One way to do that is to rename items. So what one month may be bk_onsite_1mo may become XFG1mo the next.

You must understand - the process is paramount. Resistance is futile, you will be assimilated.

Being able to put values that change into a file that get read into a ksh script is one way to cut down on the impact of such managerish actions.

The scripting guru was not assimilated, he managed to go somewhere else. Me, I get to learn more about Korn shell scripting now.

Thanks again.
WolfBrother
 

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LEARN ABOUT DEBIAN

svn-fast-backup

svn-fast-backup(1)					      General Commands Manual						svn-fast-backup(1)

NAME

       svn-fast-backup - very fast backup for Subversion fsfs repositories.

SYNOPSIS

       svn-fast-backup [-q] [-k{N|all}] [-f] [-t] [-s] repos_path backup_dir

DESCRIPTION

       svn-fast-backup uses rsync snapshots for very fast backup of a Subversion fsfs repository at repos_path to backup_dir/repos-rev, the latest
       revision number in the repository.  Multiple fsfs backups share data via hardlinks, so old backups are almost free, since a newer  revision
       of a repository is almost a complete superset of an older revision.

       This  is  good for replacing incremental log-dump+restore-style backups because it is just as space-conserving and even faster; there is no
       inter-backup state (old backups are essentially caches); each backup directory is self-contained.  It has the same  command-line  interface
       as svn-hot-backup(1) (if you use --force), but only works for fsfs repositories.

       svn-fast-backup keeps 64 backups by default and deletes backups older than these; this can be adjusted with the -k option.

OPTIONS

       -h, --help
	      Shows some brief help text.

       -q, --quiet
	      Quieter-than-usual operation.

       -k, --keep=N
	      Keep a specified number of backups; the default is to keep 64.

       -k, --keep=all
	      Do not delete any old backups at all.

       -f, --force
	      Make a new backup even if one with the current revision exists.

       -t, --trace
	      Show actions.

       -s, --simulate
	      Don't perform actions.

AUTHOR

       Voluntary contributions made by many individuals.  Copyright (C) 2006 CollabNet.

								    2006-11-09							svn-fast-backup(1)
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