Which command is used for checking if file is not open in linux?

Question

lsof command is used fot the open files in linux.Which command is used for checking if file is not open.I want to use in my script

my condition is

do
        if [[ 'lsof | grep $r_error_file' ]]
        then
                error_text=$error_text$(tail -n +1 $r_error_file | grep 'Error\')
                mv $r_error_file $(dirname ${r_error_file})/BkError/$(filename ${r_error_file})
        fi
done

fuser filename - this shows if there is a process is bound to a file? — V H, Jun 18 '14 at 09:28

score 1 · Answer 1 · answered Jun 18 '14 at 09:35

1

Use fuser command

fuser $filename
if [ $? ne 0 ]
then
    # file is open, Add your code here
fi

answered Jun 18 '14 at 09:35

Sanket Parmar

1,477
12
9

FarmerGedden · Answer 2 · 2014-06-18T09:41:20.700

0

You need the case where the lsof statement is false. There's a useful list of methods for manipulating truth in if statements here; but to ruin your fun serarching, you're looking for

if [[ ! `lsof | grep $r_error_file` ]]
then
        ...
fi

edited Jun 18 '14 at 09:41

answered Jun 18 '14 at 09:33

FarmerGedden

1,162
10
23

is it a correct way of using it because i have tried it and having some errors – user3559774 Jun 18 '14 at 09:36
Works fine for me. Have you checked you're using backticks (`) instead of apostrophes (') to enclose the lsof / grep pipe? – FarmerGedden Jun 18 '14 at 09:41
1

using $( ) instead of ` ` may avoid any confusion there - but why do you put the command between [[ ]], then execute through ` ` ? looks a bit rube-goldbergish – Deleted User Jun 18 '14 at 13:43
Yeah, I agree - I was trying to change as little as possible at once to avoid confusion. – FarmerGedden Jun 18 '14 at 15:24

Which command is used for checking if file is not open in linux?

2 Answers2