From: ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org (Eric W. Biederman)
To: Rich Felker <dalias-/miJ2pyFWUyWIDz0JBNUog@public.gmane.org>
Cc: Al Viro <viro-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org>,
David Drysdale <drysdale-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
"Michael Kerrisk (man-pages)"
<mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Andy Lutomirski <luto-kltTT9wpgjJwATOyAt5JVQ@public.gmane.org>,
Meredydd Luff <meredydd-zPN50pYk8eUaUu29zAJCuw@public.gmane.org>,
"linux-kernel@vger.kernel.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
David Miller <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>,
Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
Stephen Rothwell <sfr-3FnU+UHB4dNDw9hX6IcOSA@public.gmane.org>,
Oleg Nesterov <oleg-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Ingo Molnar <mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
"H. Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>,
Kees Cook <keescook-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>,
Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>,
Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
X86 ML <x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
linux-arch <linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Linux API <linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
sparclinux-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCHv10 man-pages 5/5] execveat.2: initial man page for execveat(2)
Date: Fri, 09 Jan 2015 19:17:41 -0600 [thread overview]
Message-ID: <87mw5rtowa.fsf@x220.int.ebiederm.org> (raw)
In-Reply-To: <20150109223843.GX4574-C3MtFaGISjmo6RMmaWD+6Sb1p8zYI1N1@public.gmane.org> (Rich Felker's message of "Fri, 9 Jan 2015 17:38:43 -0500")
Rich Felker <dalias-/miJ2pyFWUyWIDz0JBNUog@public.gmane.org> writes:
> I'm not proposing code because I'm a libc developer not a kernel
> developer. I know what's needed for userspace to provide a conforming
> fexecve to applications, not how to implement that on the kernel side,
> although I'm trying to provide constructive ideas. The hostility is
> really not necessary.
Conforming to what?
The open group fexecve says nothing about requiring a file descriptor
passed to fexecve to have O_CLOEXEC.
Further looking at open group specification of exec it seems to indicate
the preferred way to handle this is for the kernel to return O_NOEXEC
and then libc gets to figure out how to run the shell script. Is that
the kind of ``conforming'' implementation you are looking for?
Eric
WARNING: multiple messages have this Message-ID (diff)
From: ebiederm@xmission.com (Eric W. Biederman)
To: Rich Felker <dalias@aerifal.cx>
Cc: Al Viro <viro@ZenIV.linux.org.uk>,
David Drysdale <drysdale@google.com>,
"Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com>,
Andy Lutomirski <luto@amacapital.net>,
Meredydd Luff <meredydd@senatehouse.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
David Miller <davem@davemloft.net>,
Thomas Gleixner <tglx@linutronix.de>,
Stephen Rothwell <sfr@canb.auug.org.au>,
Oleg Nesterov <oleg@redhat.com>, Ingo Molnar <mingo@redhat.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Kees Cook <keescook@chromium.org>, Arnd Bergmann <arnd@arndb.de>,
Christoph Hellwig <hch@infradead.org>, X86 ML <x86@kernel.org>,
linux-arch <linux-arch@vger.kernel.org>,
Linux API <linux-api@vger.kernel.org>,
sparclinux@vger.kernel.org
Subject: Re: [PATCHv10 man-pages 5/5] execveat.2: initial man page for execveat(2)
Date: Fri, 09 Jan 2015 19:17:41 -0600 [thread overview]
Message-ID: <87mw5rtowa.fsf@x220.int.ebiederm.org> (raw)
Message-ID: <20150110011741.8JrgyMdv4e_MbBNZOm8nydTuSlZUi9mkHu_34lcqeRw@z> (raw)
In-Reply-To: <20150109223843.GX4574@brightrain.aerifal.cx> (Rich Felker's message of "Fri, 9 Jan 2015 17:38:43 -0500")
Rich Felker <dalias@aerifal.cx> writes:
> I'm not proposing code because I'm a libc developer not a kernel
> developer. I know what's needed for userspace to provide a conforming
> fexecve to applications, not how to implement that on the kernel side,
> although I'm trying to provide constructive ideas. The hostility is
> really not necessary.
Conforming to what?
The open group fexecve says nothing about requiring a file descriptor
passed to fexecve to have O_CLOEXEC.
Further looking at open group specification of exec it seems to indicate
the preferred way to handle this is for the kernel to return O_NOEXEC
and then libc gets to figure out how to run the shell script. Is that
the kind of ``conforming'' implementation you are looking for?
Eric
WARNING: multiple messages have this Message-ID (diff)
From: ebiederm@xmission.com (Eric W. Biederman)
To: Rich Felker <dalias-/miJ2pyFWUyWIDz0JBNUog@public.gmane.org>
Cc: Al Viro <viro-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org>,
David Drysdale <drysdale-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
"Michael Kerrisk (man-pages)"
<mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Andy Lutomirski <luto-kltTT9wpgjJwATOyAt5JVQ@public.gmane.org>,
Meredydd Luff <meredydd-zPN50pYk8eUaUu29zAJCuw@public.gmane.org>,
"linux-kernel@vger.kernel.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
David Miller <davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org>,
Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
Stephen Rothwell <sfr-3FnU+UHB4dNDw9hX6IcOSA@public.gmane.org>,
Oleg Nesterov <oleg-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Ingo Molnar <mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
"H. Peter Anvin" <hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>,
Kees Cook <keescook-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>,
Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>,
Christoph Hellwig <hch-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
X86 ML <x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
linux-arch <linux-arch-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Linux API <linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
sparclinux-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCHv10 man-pages 5/5] execveat.2: initial man page for execveat(2)
Date: Sat, 10 Jan 2015 01:17:41 +0000 [thread overview]
Message-ID: <87mw5rtowa.fsf@x220.int.ebiederm.org> (raw)
In-Reply-To: <20150109223843.GX4574-C3MtFaGISjmo6RMmaWD+6Sb1p8zYI1N1@public.gmane.org> (Rich Felker's message of "Fri, 9 Jan 2015 17:38:43 -0500")
Rich Felker <dalias@aerifal.cx> writes:
> I'm not proposing code because I'm a libc developer not a kernel
> developer. I know what's needed for userspace to provide a conforming
> fexecve to applications, not how to implement that on the kernel side,
> although I'm trying to provide constructive ideas. The hostility is
> really not necessary.
Conforming to what?
The open group fexecve says nothing about requiring a file descriptor
passed to fexecve to have O_CLOEXEC.
Further looking at open group specification of exec it seems to indicate
the preferred way to handle this is for the kernel to return O_NOEXEC
and then libc gets to figure out how to run the shell script. Is that
the kind of ``conforming'' implementation you are looking for?
Eric
WARNING: multiple messages have this Message-ID (diff)
From: ebiederm@xmission.com (Eric W. Biederman)
To: Rich Felker <dalias@aerifal.cx>
Cc: Al Viro <viro@ZenIV.linux.org.uk>,
David Drysdale <drysdale@google.com>,
"Michael Kerrisk \(man-pages\)" <mtk.manpages@gmail.com>,
Andy Lutomirski <luto@amacapital.net>,
Meredydd Luff <meredydd@senatehouse.org>,
"linux-kernel\@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
David Miller <davem@davemloft.net>,
Thomas Gleixner <tglx@linutronix.de>,
Stephen Rothwell <sfr@canb.auug.org.au>,
Oleg Nesterov <oleg@redhat.com>, Ingo Molnar <mingo@redhat.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Kees Cook <keescook@chromium.org>, Arnd Bergmann <arnd@arndb.de>,
Christoph Hellwig <hch@infradead.org>, X86 ML <x86@kernel.org>,
linux-arch <linux-arch@vger.kernel.org>,
Linux API <linux-api@vger.kernel.org>,
sparclinux@vger.kernel.org
Subject: Re: [PATCHv10 man-pages 5/5] execveat.2: initial man page for execveat(2)
Date: Fri, 09 Jan 2015 19:17:41 -0600 [thread overview]
Message-ID: <87mw5rtowa.fsf@x220.int.ebiederm.org> (raw)
In-Reply-To: <20150109223843.GX4574@brightrain.aerifal.cx> (Rich Felker's message of "Fri, 9 Jan 2015 17:38:43 -0500")
Rich Felker <dalias@aerifal.cx> writes:
> I'm not proposing code because I'm a libc developer not a kernel
> developer. I know what's needed for userspace to provide a conforming
> fexecve to applications, not how to implement that on the kernel side,
> although I'm trying to provide constructive ideas. The hostility is
> really not necessary.
Conforming to what?
The open group fexecve says nothing about requiring a file descriptor
passed to fexecve to have O_CLOEXEC.
Further looking at open group specification of exec it seems to indicate
the preferred way to handle this is for the kernel to return O_NOEXEC
and then libc gets to figure out how to run the shell script. Is that
the kind of ``conforming'' implementation you are looking for?
Eric
next prev parent reply other threads:[~2015-01-10 1:17 UTC|newest]
Thread overview: 123+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-24 11:53 [PATCHv10 0/5] syscalls,x86,sparc: Add execveat() system call David Drysdale
2014-11-24 11:53 ` David Drysdale
2014-11-24 11:53 ` [PATCHv10 1/5] syscalls: implement " David Drysdale
2014-11-24 11:53 ` David Drysdale
2014-11-24 11:53 ` [PATCHv10 2/5] x86: Hook up execveat " David Drysdale
[not found] ` <1416830039-21952-3-git-send-email-drysdale-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2014-11-24 12:45 ` Thomas Gleixner
2014-11-24 12:45 ` Thomas Gleixner
2014-11-24 12:45 ` Thomas Gleixner
2014-11-24 17:06 ` Dan Carpenter
2014-11-24 17:06 ` Dan Carpenter
2014-11-24 17:06 ` Dan Carpenter
2014-11-24 18:26 ` David Drysdale
2014-11-24 18:26 ` David Drysdale
[not found] ` <CAHse=S-DS=NGC619Uhzkbd-EKa0D+HgBq3rE1czmLdoxAFswPg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2014-11-25 12:16 ` Dan Carpenter
2014-11-25 12:16 ` Dan Carpenter
2014-11-25 12:16 ` Dan Carpenter
2014-11-24 18:53 ` Thomas Gleixner
2014-11-24 18:53 ` Thomas Gleixner
2014-11-24 11:53 ` [PATCHv10 3/5] syscalls: add selftest for execveat(2) David Drysdale
2014-11-24 11:53 ` David Drysdale
2014-11-24 11:53 ` [PATCHv10 4/5] sparc: Hook up execveat system call David Drysdale
2014-11-24 18:36 ` David Miller
2014-11-24 18:36 ` David Miller
2014-11-24 11:53 ` [PATCHv10 man-pages 5/5] execveat.2: initial man page for execveat(2) David Drysdale
2015-01-09 15:47 ` Michael Kerrisk (man-pages)
2015-01-09 15:47 ` Michael Kerrisk (man-pages)
2015-01-09 16:13 ` Rich Felker
2015-01-09 16:13 ` Rich Felker
[not found] ` <20150109161302.GQ4574-C3MtFaGISjmo6RMmaWD+6Sb1p8zYI1N1@public.gmane.org>
2015-01-09 17:46 ` David Drysdale
2015-01-09 17:46 ` David Drysdale
2015-01-09 17:46 ` David Drysdale
[not found] ` <CAHse=S88Jy5ZKM_VY5onfvxX7dTMngnxuHfuLeSuzvKvQNP19A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-01-09 20:48 ` Rich Felker
2015-01-09 20:48 ` Rich Felker
2015-01-09 20:48 ` Rich Felker
2015-01-09 20:56 ` Al Viro
2015-01-09 20:56 ` Al Viro
[not found] ` <20150109205626.GK22149-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org>
2015-01-09 20:59 ` Rich Felker
2015-01-09 20:59 ` Rich Felker
2015-01-09 20:59 ` Rich Felker
[not found] ` <20150109205926.GT4574-C3MtFaGISjmo6RMmaWD+6Sb1p8zYI1N1@public.gmane.org>
2015-01-09 21:09 ` Al Viro
2015-01-09 21:09 ` Al Viro
2015-01-09 21:09 ` Al Viro
2015-01-09 21:28 ` Rich Felker
2015-01-09 21:28 ` Rich Felker
2015-01-09 21:50 ` Al Viro
2015-01-09 21:50 ` Al Viro
2015-01-09 22:17 ` Rich Felker
2015-01-09 22:17 ` Rich Felker
2015-01-09 22:33 ` Al Viro
2015-01-09 22:33 ` Al Viro
2015-01-09 22:42 ` Rich Felker
2015-01-09 22:42 ` Rich Felker
[not found] ` <20150109224252.GY4574-C3MtFaGISjmo6RMmaWD+6Sb1p8zYI1N1@public.gmane.org>
2015-01-09 22:57 ` Al Viro
2015-01-09 22:57 ` Al Viro
2015-01-09 22:57 ` Al Viro
2015-01-09 23:12 ` Rich Felker
2015-01-09 23:12 ` Rich Felker
2015-01-09 23:24 ` Andy Lutomirski
2015-01-09 23:24 ` Andy Lutomirski
2015-01-09 23:37 ` Rich Felker
2015-01-09 23:37 ` Rich Felker
2015-01-10 0:01 ` Al Viro
2015-01-09 23:36 ` Al Viro
2015-01-09 23:36 ` Al Viro
[not found] ` <20150109233644.GR22149-3bDd1+5oDREiFSDQTTA3OLVCufUGDwFn@public.gmane.org>
2015-01-10 3:03 ` Al Viro
2015-01-10 3:03 ` Al Viro
2015-01-10 3:03 ` Al Viro
2015-01-10 3:41 ` Rich Felker
2015-01-10 3:41 ` Rich Felker
2015-01-10 4:14 ` Al Viro
2015-01-10 5:57 ` Rich Felker
2015-01-10 5:57 ` Rich Felker
2015-01-10 22:27 ` Eric W. Biederman
2015-01-10 22:27 ` Eric W. Biederman
2015-01-10 22:27 ` Eric W. Biederman
2015-01-11 1:15 ` Rich Felker
2015-01-11 1:15 ` Rich Felker
2015-01-11 2:09 ` Eric W. Biederman
2015-01-11 2:09 ` Eric W. Biederman
2015-01-11 2:09 ` Eric W. Biederman
[not found] ` <87oaq6oypl.fsf-JOvCrm2gF+uungPnsOpG7nhyD016LWXt@public.gmane.org>
2015-01-11 11:02 ` Christoph Hellwig
2015-01-11 11:02 ` Christoph Hellwig
2015-01-11 11:02 ` Christoph Hellwig
2015-01-12 14:18 ` David Drysdale
[not found] ` <20150109212852.GU4574-C3MtFaGISjmo6RMmaWD+6Sb1p8zYI1N1@public.gmane.org>
2015-01-09 22:13 ` Eric W. Biederman
2015-01-09 22:13 ` Eric W. Biederman
2015-01-09 22:13 ` Eric W. Biederman
2015-01-09 22:13 ` Eric W. Biederman
2015-01-09 22:38 ` Rich Felker
2015-01-09 22:38 ` Rich Felker
[not found] ` <20150109223843.GX4574-C3MtFaGISjmo6RMmaWD+6Sb1p8zYI1N1@public.gmane.org>
2015-01-10 1:17 ` Eric W. Biederman [this message]
2015-01-10 1:17 ` Eric W. Biederman
2015-01-10 1:17 ` Eric W. Biederman
2015-01-10 1:17 ` Eric W. Biederman
[not found] ` <87mw5rtowa.fsf-JOvCrm2gF+uungPnsOpG7nhyD016LWXt@public.gmane.org>
2015-01-10 1:33 ` Rich Felker
2015-01-10 1:33 ` Rich Felker
2015-01-10 1:33 ` Rich Felker
2015-01-12 11:33 ` David Drysdale
2015-01-12 16:07 ` Rich Felker
2015-01-12 16:07 ` Rich Felker
2015-01-10 7:13 ` Michael Kerrisk (man-pages)
2015-01-10 7:13 ` Michael Kerrisk (man-pages)
2015-01-09 21:20 ` Eric W. Biederman
2015-01-09 21:20 ` Eric W. Biederman
2015-01-09 21:20 ` Eric W. Biederman
[not found] ` <877fwvy7ln.fsf-JOvCrm2gF+uungPnsOpG7nhyD016LWXt@public.gmane.org>
2015-01-09 21:31 ` Rich Felker
2015-01-09 21:31 ` Rich Felker
2015-01-09 21:31 ` Rich Felker
2015-01-10 7:43 ` Michael Kerrisk (man-pages)
2015-01-10 7:43 ` Michael Kerrisk (man-pages)
2015-01-10 7:43 ` Michael Kerrisk (man-pages)
2015-01-10 8:27 ` Michael Kerrisk (man-pages)
2015-01-10 8:27 ` Michael Kerrisk (man-pages)
2015-01-10 13:31 ` Rich Felker
2015-01-10 13:31 ` Rich Felker
2015-01-10 7:38 ` Michael Kerrisk (man-pages)
2015-01-10 7:38 ` Michael Kerrisk (man-pages)
2015-01-10 7:38 ` Michael Kerrisk (man-pages)
2015-01-09 18:02 ` David Drysdale
2015-01-09 18:02 ` David Drysdale
[not found] ` <CAHse=S9kRj00eRbB+7DQd39Cso1O2LcmZpBVCbuUa9EwRQKv_w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-01-10 7:56 ` Michael Kerrisk (man-pages)
2015-01-10 7:56 ` Michael Kerrisk (man-pages)
2015-01-10 7:56 ` Michael Kerrisk (man-pages)
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