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Binary patch using perl

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# 1  
Old 12-15-2017
Binary patch using perl
for all who are interested:

  • a bash function scanning all unique strings in FILE that contain a token and replacing it.
  • Furthermore the function demonstrates how to construct a perl command from variables in a script:

Code:
 patchfile() {
        local -r file="$1"
        local -r tok="$2"
        local -r replaceby="$3"
        local rc=0
...
        # Find all unique strings in FILE that contain the pattern
        perl -pi -wE 's/'$tok'/'$replaceby'/g' $file
        rc=$?
...
        return $rc
    }

# 2  
Old 12-15-2017
Quote:
Originally Posted by dodona
for all who are interested:

  • a bash function scanning all unique strings in FILE that contain a token and replacing it.
  • Furthermore the function demonstrates how to construct a perl command from variables in a script:

Code:
 patchfile() {
        local -r file="$1"
        local -r tok="$2"
        local -r replaceby="$3"
        local rc=0
...
        # Find all unique strings in FILE that contain the pattern
        perl -pi -wE 's/'$tok'/'$replaceby'/g' $file
        rc=$?
...
        return $rc
    }

Note that with the quoting you're using on the perl command you're constructing, you won't get the desired results if any of $file, $tok, and $replaceby expand to strings that contain any <space>, <tab>, or <newline> characters. A safer and shorter way to write that line would be:
Code:
        perl -pi -wE "s/$tok/$replaceby/g" "$file"

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