linux-kernel - Re: [PATCH] linux/inotify.h: do not include <linux/fcntl.h> in userspace

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Message-ID: <20080916133112.GB15951@cs181140183.pp.htv.fi>
Date:	Tue, 16 Sep 2008 16:31:12 +0300
From:	Adrian Bunk <bunk@...nel.org>
To:	"Kirill A. Shutemov" <kirill@...temov.name>
Cc:	linux-kernel@...r.kernel.org, Ulrich Drepper <drepper@...hat.com>,
	Davide Libenzi <davidel@...ilserver.org>,
	David Woodhouse <dwmw2@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] linux/inotify.h: do not include <linux/fcntl.h> in
	userspace

On Tue, Sep 16, 2008 at 04:02:36PM +0300, Kirill A. Shutemov wrote:
> On Tue, Sep 16, 2008 at 03:58:02PM +0300, Adrian Bunk wrote:
> > On Tue, Sep 16, 2008 at 03:22:43PM +0300, Kirill A. Shutemov wrote:
> > > <linux/fcntl.h> conflicts with glibc's <fcntl.h>.
> > > 
> > > It breaks building kdelibs, kdepim and pinot.
> > 
> > We should rather fix the actual bug.
> > 
> > What is the error message?
> 
> /usr/include/asm-generic/fcntl.h:117: error: redefinition of 'struct
> flock'
> /usr/include/bits/fcntl.h:142: error: previous definition of 'struct
> flock'
> /usr/include/asm-generic/fcntl.h:140: error: redefinition of 'struct
> flock64'
> /usr/include/bits/fcntl.h:157: error: previous definition of 'struct
> flock64'
>...

Kernel headers and glibc headers are an own story, Ulrich might know 
best about that.


But I'm wondering, why is kdelibs doing

<--  snip  -->

...
#include <fcntl.h>
#include <sys/syscall.h>
#include <linux/types.h>
// Linux kernel headers are documented to not compile
#define _S390_BITOPS_H
#include <linux/inotify.h>

static inline int inotify_init (void)
{
  return syscall (__NR_inotify_init);
}
...

<--  snip  -->


pinot even contains a file with the inotify syscall numbers for all 
architectures.


inotify_init(2) already documents the following usage:

<--   snip  -->

...
#include <sys/inotify.h>

int inotify_init(void);
...

<--  snip  -->


Unless someone knows a good reason against that (and no matter how the 
kernel situation will change) I'll send patches to get KDE fixed in this 
respect.


cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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