linux-kernel - Re: [RFC PATCH 00/28] Linux Kernel Library

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Message-ID: <20151107071946.GU29330@redhat.com>
Date:	Sat, 7 Nov 2015 07:19:46 +0000
From:	"Richard W.M. Jones" <rjones@...hat.com>
To:	Richard Weinberger <richard@....at>
Cc:	Octavian Purdila <octavian.purdila@...el.com>,
	Linux-Arch <linux-arch@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Hajime Tazaki <thehajime@...il.com>
Subject: Re: [RFC PATCH 00/28] Linux Kernel Library

On Sat, Nov 07, 2015 at 01:35:36AM +0100, Richard Weinberger wrote:
> Am 04.11.2015 um 15:15 schrieb Octavian Purdila:
> > We could redefine the syscalls/libc symbols to call lkl_sys_ functions
> > in launch-lkl, e.g.:
> > 
> > int opendir(const char *path)
> > {
> >    return lkl_opendir(new_path)
> > }
> 
> To get a better feeling how LKL behaves I've started with a tool
> to mount any Linux filesystem by FUSE.
> I.e. such that we can finally automount without root and bugs in filesystem
> code won't hurt that much.

guestmount already does this:

http://libguestfs.org/guestmount.1.html

By porting a small amount of code from the daemon/ directory, it could
do it using lkl too.  See:

http://www.gossamer-threads.com/lists/linux/kernel/2296116#2296116

Rich.

> lkl_sys_fstatat64() uses the type struct lkl_stat64. Where is it defined?
> git grep is unable to locate it.
> At least it seems to be incompatible with my local struct stat.
> 
> And why is there no lkl_sys_openat() syscall?
> 
> Thanks,
> //richard

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