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 Forum index » Advanced Topics » Cutting edge
bashbox: multicall bash script
Moderators: Flash, Ian, JohnMurga
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2lss

Joined: 20 Sep 2009
Posts: 225
PostPosted: Sun 13 Mar 2011, 23:13    Post subject:  
technosaurus wrote:
just save this into a script to test the dir_tree portion
Code:
#!/bin/sh
DIR=$1
[ $2 ] && SPACING=$2 || SPACING="|"
for x in `ls $DIR`; do
[ -d $DIR/$x ] &&  echo "$SPACING\`-{"$x && $0 $DIR/$x "$SPACING  "
done


Sorry to get off subject, but this would work for me. Only problem is when there is a space in the filename.

'for' splits the input by line, and any file name with a space in it throws it off.

Normally I would use double quotes around a variable to prevent this, but with the for/next loop I am not sure.
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technosaurus


Joined: 18 May 2008
Posts: 3845
PostPosted: Mon 14 Mar 2011, 11:38    Post subject:  
as an alternative you can simply use
Code:
DIR=${1:-`pwd`}
SPACING=${2:-|}
cd $DIR
for x in * ; do
[ -d $DIR/$x ] &&  echo "$SPACING\`-{"$x && $0 $DIR/$x "$SPACING  "
done
I think it will keep the spaces (not on a *nix box, but I think I may have already done similar in dev)

EDIT ... needed to cd to $DIR for this way to work

I also have an efficient recursive space replace script in the dev version if you are interested, but I don't keep files with spaces around, so not well tested - just 1-2 sub-directories or so. It only requires mv (not sed awk or grep as others do - it uses only the shell's internal substring manipulation - resulting in ~1000% speed improvement)

... right now I don't have a net connection at home so I'm trying to work on a dialog/Xdialog wrapper, so that scripts work independent of X/console (I think goingnuts may have done some work on this already?)
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2lss

Joined: 20 Sep 2009
Posts: 225
PostPosted: Tue 15 Mar 2011, 02:44    Post subject:  
technosaurus wrote:
as an alternative you can simply use
Code:
DIR=${1:-`pwd`}
SPACING=${2:-|}
cd $DIR
for x in * ; do
[ -d $DIR/$x ] &&  echo "$SPACING\`-{"$x && $0 $DIR/$x "$SPACING  "
done
I think it will keep the spaces (not on a *nix box, but I think I may have already done similar in dev)

EDIT ... needed to cd to $DIR for this way to work


I gave this a try. Unfortunately there is still a problem. When the file or directory is evaluated by [ -d $DIR/$x ] if there is a space the test will throw an error. Quoting $DIR/$x causes the test to always fail. I think cd $DIR needs double quotes as well.

I will give the dev version a shot and see how it works.

EDIT: Which version is the dev version?

technosaurus wrote:

It only requires mv (not sed awk or grep as others do - it uses only the shell's internal substring manipulation - resulting in ~1000% speed improvement)

Thats pretty awesome. I never put much thought into the performance aspect of shell scripting.
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technosaurus


Joined: 18 May 2008
Posts: 3845
PostPosted: Tue 15 Mar 2011, 10:54    Post subject:  
I'll have to upload a new DEV version, but I need to transfer it to my droid or go find a hotspot somewhere (it may be a day or 2). My wife has our Altel internet stuff with her in Illinois.
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