can I modify a file without using a temporary file

[Lin Jingxian]

hi,
I want to modify contents of a file. usually I will open the file,read the
contents,
do some substitution, and write them to a temporary file, then delete the
original file,
rename the temporary file to the original file.
now I want not to use a temporary file, can I do it in perl ?

thanks.

 

[Jürgen Exner]

hi,
I want to modify contents of a file. usually I will open the
file,read the contents,
do some substitution, and write them to a temporary file, then delete
the original file,
rename the temporary file to the original file.
now I want not to use a temporary file, can I do it in perl ?

Sure, just open() the file for read and write and then seek() to whereever
you want to write.

jue

 

[Tad McClellan]

I want to modify contents of a file.

perldoc -q file

How do I change one line in a file/delete a line in a file/insert a
line in the middle of a file/append to the beginning of a file?