lix/src/libutil/immutable.hh

#pragma once

#include <types.hh>

namespace nix {

/* Make the given path mutable. */
void makeMutable(const Path & path);

}
Use "#pragma once" to prevent repeated header file inclusion 2012-07-18 18:59:03 +00:00			`#pragma once`
On Linux, make the Nix store really read-only by using the immutable bit I was bitten one time too many by Python modifying the Nix store by creating *.pyc files when run as root. On Linux, we can prevent this by setting the immutable bit on files and directories (as in ‘chattr +i’). This isn't supported by all filesystems, so it's not an error if setting the bit fails. The immutable bit is cleared by the garbage collector before deleting a path. The only tricky aspect is in optimiseStore(), since it's forbidden to create hard links to an immutable file. Thus optimiseStore() temporarily clears the immutable bit before creating the link. 2012-02-15 00:31:56 +00:00
			`#include <types.hh>`

			`namespace nix {`

			`/* Make the given path mutable. */`
			`void makeMutable(const Path & path);`

			`}`