File permissions not preserved with copy function?

[John Murtari]

Folks,

Just noticed this with PHP 5 on RHEL 4 -- started using
the copy function to move some files around and saw that
executable permissions were being lost? The documentation didn't
say anything about that? Is this a bug or a feature?

Thanks.
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John
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Re: File permissions not preserved with copy function?

John Murtari escribió:

Just noticed this with PHP 5 on RHEL 4 -- started using
the copy function to move some files around and saw that
executable permissions were being lost? The documentation didn't
say anything about that? Is this a bug or a feature?

It sounds sensible. Copying means reading the original file, creating a
new file and dumping contents in the new file. Let's see an extreme example:

-rw-r--r-- root root /usr/share/foo/splash.png

Obviously, john should not be able to create a new file owned by root.
But he should be able to copy the file if he can read the source and has
permissions in the destination directory.

Check these functions:

umask()
stat()
chmod()
chown()
chgrp()


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