From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753485AbYJAO6Q (ORCPT ); Wed, 1 Oct 2008 10:58:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752743AbYJAO6B (ORCPT ); Wed, 1 Oct 2008 10:58:01 -0400 Received: from rv-out-0506.google.com ([209.85.198.237]:47015 "EHLO rv-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752386AbYJAO6A (ORCPT ); Wed, 1 Oct 2008 10:58:00 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=message-id:date:from:reply-to:to:subject:cc:in-reply-to :mime-version:content-type:content-transfer-encoding :content-disposition:references; b=ws/48QXDmBrnepi6nWwaF+OMXUEIq47DLxpjrtir+S6axtrbr4l+ci3njbh6k7veK1 M2Tfe9/2NskS8USj/D1pGCdLgtlRYAk1Aem1MylvGXbYD/j8TaYvVcvjf6Fa78UWmH9m A4kKEFMGTaEci17T/KEK61OWfhI0NXf3SFBGg= Message-ID: Date: Wed, 1 Oct 2008 16:57:58 +0200 From: "Michael Kerrisk" Reply-To: mtk.manpages@gmail.com To: "Thomas Gleixner" Subject: Re: [RFC patch 0/3] signals: add rt_tgsigqueueinfo syscall V2 Cc: LKML , "Ingo Molnar" , "Ulrich Drepper" , "Roland McGrath" , "Oleg Nesterov" , linux-api@vger.kernel.org In-Reply-To: <20081001095204.343984413@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20081001095204.343984413@linutronix.de> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [CC+=linux-api@vger.kernel.org] On Wed, Oct 1, 2008 at 12:01 PM, Thomas Gleixner wrote: > Changes vs. V1: compat_sys_rt_sigqueueinfo implemented. Thanks Roland ! > > sys_kill has a counterpart sys_tgkill which allows to send signals to > a particular thread. sys_rt_sigqueueinfo is lacking such a counterpart. > > Aside of the asymetry it is a show stopper for migrating applications > from other unix-alike RTOSes. > > The following patch series implements rt_tgsigqueueinfo and hooks it > up for x86. This is an excellent candidate for CCing to the new linux-api@vger (http://thread.gmane.org/gmane.linux.ltp/5658/), since it is an API change. > Find below the raw documentation. Thanks -- I'll work that up into a man page when this gets closer to release. Cheers, Michael > ---- > > NAME > rt_tgsigqueueinfo - Send signal information to a signal to a thread > > SYNOPSIS > long sys_rt_tgsigqueueinfo (int tgid, int tid, int sig, siginfo_t *uinfo); > > DESCRIPTION > > rt_tgsigqueueinfo sends signal sig information uinfo to the > thread with the thread ID tid in the thread group tgid. (By > contrast, rt_sigqueueinfo(2) can only be used to send a signal > info to a process (i.e., thread group) as a whole, and the > signal will be delivered to an arbitrary thread within that > process.) > > RETURN VALUE > > rt_tgsigqueueinfo returns 0 on success; otherwise, > rt_sigqueueinfo returns one of the errors listed in the > "Errors" section. > > ERRORS > -EFAULT > An invalid value for uinfo was specified. > > -EINVAL > An invalid TID, TGID or signal was specified. > > -EPERM > Permission denied. For the required permissions, > see rt_sigqueueinfo(2). > > -ESRCH > No process with the specified thread ID and thread group > ID exists. > > > -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ git://git.kernel.org/pub/scm/docs/man-pages/man-pages.git man-pages online: http://www.kernel.org/doc/man-pages/online_pages.html Found a bug? http://www.kernel.org/doc/man-pages/reporting_bugs.html