Shell Programming and Scripting

Hi meharo,

Thanks for your reply. How can we modify the code if we need to search for multiple files.

Code:

 
#!/bin/bash
 
my_file1="/mylocation/myfile1.log"
my_file2="/mylocation/myfile2.log"
my_string="Match Found"
 
tail -F "$my_file1" "$my_file2" | while read line ; do
if test -n "$(echo "$line" | grep "$my_string")" ; then
echo "Match found!"
exit 0
else
exit 1
fi
done

The above program will wait for both file1 and file2. Whenever it finds a file with proper string match, condition triggers.

The else condition to quit the program (exit 1) has to be used wisely. If you are looking for some 'lock' files with specific string content, the program can wait for the file(s) to occur in specific path and act immediately. If the file is a log file and always present in path, it is not wise to use the else logic, it will just quit the program after reading the first line itself.

meharo

to recursively search a string in files in a dir try

find . -name <name / pattern of your file> -print | xargs grep <string to be searched> 2>/dev/null

Cheers