You open the script itself (location stored in $0) on filehandle F and assign the first two lines to $_.
Then you start a substitution operating on $_, with ; as a delimiter, so de-obfuscated (using a | as delimiter) it looks like:
$_=~s|^.*?\/(..).*?i(.).(.*?)\s.*?\ss(.)(.).(.).*|J$1$4 a$2o$4he$5 $3
You basically scan the first two lines for some stuff:
- The two chars following the first slash go into $1 ('us')
- Then you scan for the next 'i' and save the following char in $2 ('n')
- You skip the next char and save everything up to the next space in $3 ('perl')
- You skip to the next space followed by 's' and save the next char in $4 ('t')
- The next char goes into $5 ('r')
- Then skip one and save the last in $6 ('c')
and then print the new value of $_.
But I still don't know what the c in cjaph stands for ...
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