Re: why cp in do_install() change file permission mode?

[Richard Purdie <rpurdie@linux.intel.com>]

On Thu, 2010-12-02 at 18:16 +0800, Lu, Lianhao wrote:
> Hi fellows,
> 
> Could anyone tell me why does the cp in do_install() change the file permission mode? Thanks!
> 
> do_install () {
> 	rm -rf ${D}${installed_dir}
> 	install -d ${D}${installed_dir}
> 	cp -rp ${S}/* ${D}${installed_dir}
> }
> 
> After "bitbake xxx -c install", I found the file under
> ${D}${installed_dir} had the permission mode of 0744 while the
> corresponding file under directory ${S} had the mode of 0644. Why did
> this happen? How to avoid this kind of mode change? Thanks!

do_install and all tasks that work on the output of do_install run under
pseduo which can mean the permissions on disk might not match the real
permissions as seen within a pseduo session.

To illustrate, in a do_install do something like

chown root.root somefile 
ls -la somefile

then look at the file on disk and you'll see different owners. The
ownership works the same way as the permissions.

Cheers,

Richard

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