using IF loop to grep for a pattern and execute statements

Question

I am having a directory in which it contains 20 sub-directories and all sub-directories names end with "_b". In each sub-directory same file name "error.txt" is there. I need to loop-in to all the sub-directories and grep for a word called "ECHO" in the "sub-directory/error.txt" file and if the word is present I need to execute statement one, if the word "ECHO" is not present in file "sub-directory/error.txt" I need to execute statement two. I tried like this:

#!/bin/bash
File="./error.txt"
for d in *_b;
do
if grep -q "ECHO" "$File"; then
echo "$d:";
    Statement 1 
echo "------------------";
else 
echo "$d:";
    Statement 2 
echo "------------------";
fi
done

But I am not getting the desired output , I am getting output as :

grep: ./error.txt: No such file or directory

find *_b -maxdepth 1 -type f -iname error.txt -print0 | while read -r -d '' file; do if grep -qi ECHO "$file"; then ... else ... fi; done is the better choice loop over non-trivial file names (example) and maybe case-insensitive search (i) give more results — alecxs
– alecxs, Commented Aug 23, 2020 at 11:22
Not the problem you're asking about but don't duplicate code - move the echo "$d:"; to before your if-else and the echo "------------------"; to after it. You don't need the ;s btw. — Ed Morton
– Ed Morton, Commented Aug 23, 2020 at 13:38

rossifr · Accepted Answer · 2020-08-23 10:23:42Z

1

I just adjusting the path should work

#!/bin/bash
File="error.txt"
for d in *_b;
do
if grep -q "ECHO" $d/"$File"; then
echo "$d:";
    Statement 1
echo "------------------";
else
echo "$d:";
    Statement 2
echo "------------------";
fi
done

answered Aug 23, 2020 at 10:23

rossifr

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2 Comments

Rama Over a year ago

I am still seeing the same error as: grep: error.txt: No such file or directory. Here error.txt is a common file name in all 20 sub-directories, I need to loop in to all 20 sub-directories and grep for the word "ECHO" in "error.txt" file.

alecxs Over a year ago

sure it isn't grep: *_b/error.txt: No such file or directory i can barely see a reason how $d can be empty (nevertheless path should quoted with double quotes)

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