you can do this in two steps:

read open
dump all to a variable (in memory)
apply a substitution to this variable
close
re-open the file, now for writing
print the changed variable to the file (overwrite the whole file)
and close again

[download]

No temp files here, and your file is updated as you want. Use perldoc for the details.

In reply to Re^3: opening file for editing by pvaldes
in thread opening file for editing by ramprasad27

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