Find and replace from multiple files Post: 303018603

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Top Forums UNIX for Beginners Questions & Answers Find and replace from multiple files Post 303018603 by jim mcnamara on Monday 11th of June 2018 06:13:26 PM

06-11-2018

Registered User

I'm not sure your plan is the best but here is a suggestion, make a backup first even though there is garbage in there.:
If it is limited to php files (for example), then limit searching with find as step one, then use grep to see if the file is infected, and sed to remove bad strings - sed has to write to a tmp file which at the end of sed processing gets copied back and then re-set permissions/ownership.
psuedocode:

Code:

find /path/to/start  -type f -name '*php' |
while read fname 
do
   grep -q 'malware code pattern' $fname
   if [ $? -eq 0 ]; then
      sed 's/malware pattern//g' $fname  >/tmp/file
      mv /tmp/file $fname
      chown [required ownership] $fname
      chmod [required permissions] $fname 
   fi
done

This has the potential of breaking some code. It also depends on how well you did checking for malware, it could simply reinfect your system if you missed something.
Be sure to get a good backup once the system is running correctly.

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LEARN ABOUT PHP

xdiff_file_merge3

XDIFF_FILE_MERGE3(3)							 1						      XDIFF_FILE_MERGE3(3)

xdiff_file_merge3 - Merge 3 files into one

SYNOPSIS

       mixed xdiff_file_merge3 (string	$old_file, string  $new_file1, string  $new_file2, string  $dest)

DESCRIPTION

	Merges	three  files  into one and stores the result in a file $dest. The $old_file is an original version while $new_file1 and $new_file2
       are modified versions of an original.

PARAMETERS

	      o $old_file
		- Path to the first file. It acts as "old" file.

	      o $new_file1
		- Path to the second file. It acts as modified version of $old_file.

	      o $new_file2
		- Path to the third file. It acts as modified version of $old_file.

	      o $dest
		- Path of the resulting file, containing merged changed from both $new_file1 and $new_file2.

RETURN VALUES

	Returns TRUE if merge was successful, string with rejected chunks if it was not or FALSE if an internal error happened.

EXAMPLES

       Example #1

	      xdiff_file_merge3(3) example

	       The following code merges three files into one.

	      <?php
	      $old_version = 'original_script.php';
	      $fix1 = 'script_with_fix1.php';
	      $fix2 = 'script_with_fix2.php';

	      $errors = xdiff_file_merge3($old_version, $fix1, $fix2, 'fixed_script.php');
	      if (is_string($errors)) {
		  echo "Rejects:
";
		  echo $errors;
	      }
	      ?>

SEE ALSO

       xdiff_string_merge3(3).

PHP Documentation Group 												      XDIFF_FILE_MERGE3(3)