Finding files with specific size

[Sanjay Verma]

find . -local -size +9999 -print | ls -l

Hi Friends,
I am using the above command to display the files with the size specified but I am getting the files which are even smaller than the size listed above. Although I've looked into the -size n & c options, but still it doesn't help.

I am trying to search for files with size=84bytes and delete those. Am I missing something somewhere...??

[Michael Steele_2 · Accepted solution]

"...-size +n..." equates to :
+ : greater than
n : n blocks of 512 bytes.

"...-size -n..."
- : less than n blocks.

"...-size n..."
equal to n blocks.

"...-size +nc..."
+ : greater than
nc : characters (* one char = on byte *)

For "...size=84 bytes and delete..."

cd /dir
find . -size 84c -exec rm {} \;

[John Poff]

Hi,

I'm not sure how to find files of an exact size using the 'find' command since it uses blocks for the size. I did figure out a way to do it using Perl. There is a Perl utility called find2perl which will take the parameters for a find command and write a little Perl script to do the same thing. I did that and modified the script to find files of exactly 84 bytes. I've posted the script as an attachment.

JP

[T G Manikandan]

#find -size 84c -exec ll {} \;

[John Poff]

Oh, never mind. I guess I should do a 'man find' sometime. Duh! :)

JP

[Sanjay Verma]

Hi Fred, John & Mainkandan
That's really great to have good people like you. Yes, I've implemented the same and it's working fine. Still doing some more cosmetic changes in the perl script to suit the needs.

Would you be able to indicate the possibility of merging the 2 commands into 1, i.e., display it first and then delete it?
find -size 84c -exec ll {} \;
find . -size 84c -exec rm {} \;

[T G Manikandan]

you can use this format which will ask for removing files interactively.


#find -size 84c -ok rm {} \;

[H.Merijn Brand (procura]

Though the perl script is OK, it's rather unusable that way. These things are for extending, not for command line use.


# perl -MFile::Find -e'find(sub{-f&&-s==84&&print},".")'

does find all files with size 84, and in a system independant way. Here it is on cygwin:

LT03:/tmp 6 $ ll ????.???
-rwxrwxrwx+ 1 Administ None 32768 Nov 5 21:49 MMC3.tmp*
-rwxrwxrwx+ 1 Administ None 32768 Nov 5 21:49 MMC4.tmp*
-rwxrwxrwx+ 1 Administ None 32768 Nov 5 21:49 MMC5.tmp*
-rwxrwxrwx+ 1 Administ None 10678 Dec 2 16:22 Off2.tmp*
-rwxrwxrwx+ 1 Administ None 11158 Dec 5 07:28 Off3.tmp*
-rwxrwxrwx+ 1 Administ None 13558 Feb 11 18:40 Off4.tmp*
-rw-rw-rw- 1 lt03 None 1824 Jan 10 15:03 XWin.log
LT03:/tmp 7 $ perl -MFile::Find -le'find(sub{-f&&-s==1824&&print},".")'
XWin.log
LT03:/tmp 8 $

replace the 'print' with any action you like

Enjoy, have FUN! H.Merijn

[Sanjay Verma]

Hi Procura, Will appreciate if you can explain your comments in detail. -Sanjay

[H.Merijn Brand (procura]

# perl -MFile::Find -e'find(sub{-f&&-s==84&&print},".")'

option -M means use module ...
in this case, I want to use File::Find, a module shipped with the perl5 CORE distribution, giving you system independent 'find' functionality in perl
use 'man File::Find' to find out more about it

here's the script in verbose mode:

--8<---
#!/usr/bin/perl

use strict;
use warnings;

use File::Find;

my @dirs_to_find = (".");

sub action
{
-f or return; # only 'files' please, no dir's or pipes
-s == 84 or return; # Only need files with size 84
unlink $File::Find::name; # remove the file
}, @dirs_to_find);
-->8---

clear?

Enjoy, have FUN! H.Merijn

[H.Merijn Brand (procura]

uhh, thinko's

Change
--8<---
sub action
{
-f or return; # only 'files' please, no dir's or pipes
-s == 84 or return; # Only need files with size 84
unlink $File::Find::name; # remove the file
}, @dirs_to_find);
-->8---

to

--8<---
sub action
{
-f or return; # only 'files' please, no dir's or pipes
-s == 84 or return; # Only need files with size 84
unlink $File::Find::name; # remove the file
}
find (\&action, @dirs_to_find);
-->8---

I'm so used to the 'find (sub{},".")' notation, that I used it :/

Enjoy, have FUN! H.Merijn

[Robin Wakefield]

Hi,

If you want to do the ll and rm in "one go" with find:

find . -size 84c -type f | xargs -i echo "ll {};rm {}" |sh

rgds, Robin.