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Top Forums Shell Programming and Scripting Recursively hard linking files -- bonehead question Post 302256266 by scyphers on Sunday 9th of November 2008 12:10:33 AM
Old 11-09-2008
Question Recursively hard linking files -- bonehead question

I used to program ksh a while back, but I've been off in Oracle/Windows land (for clients -- not by choice) for so long that I can't remember what should be an easy thing. Here's the scenario:

1)Find all files and directories beneath some directory point (A).
2)If directory, make the subdirectory at some different directory point (B)
3)If file, link (not symbolic) the file in the correct subdirectory under point B.

For a more concrete example, here's a scenario.

Point A: /usr/test
Point B: /var/test

File structures:
/usr/test
/usr/test/oracle
/usr/test/oracle/script 1
/usr/test/oracle/script 2
/usr/test/db2
/usr/test/db2/script 1
/usr/test/db2/script 2

I'm trying to write a script that will result in the following output (and/or actually do the work instead of writing an output script, but I can live with creating a secondary script):

mkdir /var/test/oracle
ln /usr/test/oracle/"script 1" /var/test/oracle/"script 1"
ln /usr/test/oracle/"script 2" /var/test/oracle/"script 2"
mkdir /var/test/db2
ln /usr/test/db2/"script 1" /var/test/db2/"script 1"
ln /usr/test/db2/"script 2" /var/test/db2/"script 2"

Here's the pseudo code for what I've been working on so far:

#!/bin/bash

#declare variables
cnt=0 #array counter
# &1 == Source Directory
# &2 == Target Directory
source_len=awk '{ print length }'

# Find out what the subdirectories are
full_list=find $1 -print 2>/dev/null

## Populate the subdirectories into an array
## Trim the root from the subdirectories into a second array
subdir = full_list| cut -c source_len-

# Loop through, creating them one at a time.
if [-d full_list]
then
# make the new directory
echo "mkdir $target/$subdir"
elif [-f source]
then
# link the file
echo "ln $full_list $target/$subdir"
fi

Someone suggested to me mounting /usr/test to /var/test, but that doesn't completely satisfy the necessary requirements (and would result in a few thousand mount points being scattered through the environment -- not a pretty picture)...

if this was PL/SQL, it would have taken me about 15 seconds to write, but I'm rusty on bash scripting. Any thoughts?

--CS
 

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BLOCKDIAG(1)						      General Commands Manual						      BLOCKDIAG(1)

NAME
blockdiag - generate block-diagram image file from spec-text file. SYNOPSIS
blockdiag [options] file DESCRIPTION
This manual page documents briefly the blockdiag commands. blockdiag is a program that generate block-diagram image file from spec-text file. OPTIONS
These programs follow the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is included below. For a complete description, see the SEE ALSO. --version show program's version number and exit -h, --help Show summary of options -a, --antialias Pass diagram image to anti-alias filter -c FILE, --config=FILE read configurations from FILE -o FILE write diagram to FILE -f FONT, --font=FONT use FONT to draw diagram --fontmap=FONT use FONTMAP file to draw diagram -s, --separate Separate diagram images for each group -T TYPE Output diagram as TYPE format --nodoctype Do not output doctype definition tags (SVG only) --no-transparency do not make transparent background of diagram (PNG only) SEE ALSO
The programs are documented fully by http://tk0miya.bitbucket.org/blockdiag/build/html/index.html AUTHOR
blockdiag was written by Takeshi Komiya <i.tkomiya@gmail.com> This manual page was written by Kouhei Maeda <mkouhei@palmtb.net>, for the Debian project (and may be used by others). May 9, 2011 BLOCKDIAG(1)
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