Recursive directory search using ls instead of find
I was working on a shell script and found that the find command took too long, especially when I had to execute it multiple times. After some thought and research I came up with two functions.
fileScan()
filescan will cd into a directory and perform any operations you would like from within it.
directoryScan()
directoryScan will recursively cd into all directories benieth an initial provided root directory. once in a new directory, the directory is sent to fileScan so that other functions can be executed.
I found that this is blazing fast compared to find especially when searching large directory trees or if having to run more than one find in a script or chron.
enjoy the code
Code:
#!/bin/bash
# Directory Scanner using recursive ls instead of find
# Do not make any of the local variables into globals
# folder, numdirectories, and x should not be used outside fileScan() and directoryScan()
# directoryScan() will cd into all directories below the "root" directory sent to it
# fileScan() will perform operations on any directory sent to it
fileScan()
{
local folder=$1
cd $folder
if [ $folder = $PWD ]
then
#you are now inside of a directory. Do any operations you need to do with files that may exist in this directory
fi
}
directoryScan()
{
local folder=$1
cd $folder
if [ $folder = $PWD ]
then
local numdirectories=$(ls -lS | egrep '^d' | wc -l)
fileScan $folder
local x=1
while [ $x -le $numdirectories ]
do
subdirectory=$(ls -lS | egrep '^d' | sed "s/[ \t][ \t]*/ /g" | cut -d" " -f9 | head -n $x | tail -n 1)
subdirectory="${folder}/${subdirectory}"
directoryScan $subdirectory
x=$(($x + 1))
cd $folder
done
fi
}
# sample call to directoryScan()
# directoryScan $rootdirectory
# sample call to fileScan()
# fileScan $scandirectory
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Discussion started by: Michael Stora
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LEARN ABOUT OPENSOLARIS
hal-find-by-property
hal-find(1M) System Administration Commands hal-find(1M)NAME
hal-find, hal-find-by-capability, hal-find-by-property - search HAL global device list
SYNOPSIS
hal-find-by-capability --capability capability [--help]
[--verbose] [--version]
hal-find-by-property --key key --string value [--help]
[--verbose] [--version]
DESCRIPTION
The hal-find commands, hal-find-by-capability and hal-find-by-property, search the Hardware Abstraction Layer (HAL) device list by speci-
fied criteria and displays results on the standard output. hal-find-by-capability searches by capability, such as volume or block. hal-
find-by-property searches by property, such as block.is_volume or volume.disc.has_audio.
OPTIONS
The following options are supported:
--capability capability HAL device capability to search for.
--help Display list of options.
--key key The key to the property that is the basis of the search.
--string value The string value associated with the property that is the basis of the search.
--verbose Verbose mode.
--version Display version and exit.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWhalr |
+-----------------------------+-----------------------------+
|Interface Stability |Volatile |
+-----------------------------+-----------------------------+
SEE ALSO hald(1M), attributes(5), hal(5)SunOS 5.11 22 Aug 2006 hal-find(1M)
07-06-2011
