From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from ewsoutbound.kpnmail.nl (ewsoutbound.kpnmail.nl [195.121.94.184]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B4FE01C84AD for ; Thu, 17 Apr 2025 09:49:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=195.121.94.184 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744883353; cv=none; b=H6qlunsnbGUSvgmE8K+E2E2pz3DzXm+QBzDbD7oJkXM6S+WbM58ZpuYVebXgms4G6TE8ezCkV8V86tFn0s8htCBaShzVv6XHf+jUg+drNum0xJ1NQIZlZ6QZIyA8piCmlnEJYWzRRRgl2XAOTazvJXqrTqmlv/4CxsOvyRedz8I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744883353; c=relaxed/simple; bh=m5omdOJafuRszlfk9g+82IF++/bQXwsRfrVgkh3mR7g=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=M8e+DUwf273J1mK1oeymrMlu8ayHI8/OIeS6C2gD21IkjVz785v7eypuR1uQPuU6GA0KrNHmKawiial9FUjHijYNdE5x000xIgxshDyMJr3OGqm9F8IXq+VwaEw5xQPIHI9HJffvavV+RDFhLnRUcXYzO6dMzyfbarsszDluzDY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=telfort.nl; spf=pass smtp.mailfrom=telfort.nl; dkim=pass (1024-bit key) header.d=telfort.nl header.i=@telfort.nl header.b=bENi03SZ; arc=none smtp.client-ip=195.121.94.184 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=telfort.nl Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=telfort.nl Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=telfort.nl header.i=@telfort.nl header.b="bENi03SZ" X-KPN-MessageId: 555b6d80-1b71-11f0-8ec8-005056994fde Received: from smtp.kpnmail.nl (unknown [10.31.155.5]) by ewsoutbound.so.kpn.org (Halon) with ESMTPS id 555b6d80-1b71-11f0-8ec8-005056994fde; Thu, 17 Apr 2025 11:50:02 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=telfort.nl; s=telfort01; h=mime-version:message-id:date:subject:to:from; bh=562VxIOzaaRmf66s/RTx06+K2nlWN//NWE97b7cXqoo=; b=bENi03SZBZEXkiC6fnvIb0+8GAH/OIN35vj10NqUTVTuHoRPwDei1elNyHf7tjyvNvR49M68CIOO7 UrrU61EZHaWsGxSyfCPy1V1bhy7shNaRPabk80iItcYqmttwFB5C8F+mMLJ3Yl/3UFudVhckESoEC1 E77OAtD9nTRUm0PQ= X-KPN-MID: 33|mTVYqzwd9FyI1VQyr2IEpzz8ZmnXRCPJ5elW4GUq7aO0IHMeg5fjphoXvy+LrHi 59Q5GkYbyT5W5MVbfS3jxEw== X-KPN-VerifiedSender: Yes X-CMASSUN: 33|ypOnaXujBH0Ij6SBgFY2wkUXwikGvhltRtVJxMrXjWR+WLeWkxe0qO/cPDYeWTs IEi0wh+vjR0JiI9iMEzkpSw== Received: from localhost (77-163-176-192.fixed.kpn.net [77.163.176.192]) by smtp.kpnmail.nl (Halon) with ESMTPSA id 360dcf59-1b71-11f0-9da2-00505699b758; Thu, 17 Apr 2025 11:49:10 +0200 (CEST) From: Benno Schulenberg To: util-linux@vger.kernel.org Cc: David Anes Subject: [PATCH 07/10] renice: (man) reword several things, to be clearer, and improve some markup Date: Thu, 17 Apr 2025 11:48:21 +0200 Message-ID: <20250417094825.20870-7-bensberg@telfort.nl> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250417094825.20870-1-bensberg@telfort.nl> References: <20250417094825.20870-1-bensberg@telfort.nl> Precedence: bulk X-Mailing-List: util-linux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Also, remove a reference to ulimit(1p) that doesn't make sense. CC: David Anes Signed-off-by: Benno Schulenberg --- sys-utils/renice.1.adoc | 37 ++++++++++++++++++++++++++----------- 1 file changed, 26 insertions(+), 11 deletions(-) diff --git a/sys-utils/renice.1.adoc b/sys-utils/renice.1.adoc index e50e1e918..5f2e2a98d 100644 --- a/sys-utils/renice.1.adoc +++ b/sys-utils/renice.1.adoc @@ -46,24 +46,30 @@ renice - alter priority of running processes == SYNOPSIS -*renice* [*--priority|--relative*] _priority_ [*-g*|*-p*|*-u*] _identifier_... +*renice* [*-n*|*--priority*|*--relative*] _priority_ [*-g*|*-p*|*-u*] _identifier_... == DESCRIPTION *renice* alters the scheduling priority of one or more running processes. The first argument is the _priority_ value to be used. The other arguments are interpreted as process IDs (by default), process group IDs, user IDs, or user names. *renice*'ing a process group causes all processes in the process group to have their scheduling priority altered. *renice*'ing a user causes all processes owned by the user to have their scheduling priority altered. -If no *-n*, *--priority* or *--relative* option is used, then the priority is set as *absolute*. +By default, _priority_ is understood as an absolute value. But when option *--relative* is given, +or when option *-n* is given and the environment variable POSIXLY_CORRECT is set, then _priority_ +is understood as a relative value. == OPTIONS -*-n* _priority_:: -Specify the *absolute* or *relative* (depending on environment variable POSIXLY_CORRECT) scheduling _priority_ to be used for the process, process group, or user. Use of the option *-n* is optional, but when used, it must be the first argument. See *NOTES* for more information. +*-n* _priority_|__delta__:: +Specify the absolute scheduling priority (when POSIXLY_CORRECT is not set) or a relative +priority (when POSIXLY_CORRECT *is* set). See *NOTES* below for more details. +Using option *-n* is optional, but when used, it must be the first argument. *--priority* _priority_:: -Specify an *absolute* scheduling _priority_. _Priority_ is set to the given value. This is the default, when no option is specified. +Specify the absolute scheduling _priority_ to be used. +This is the default, when no option is specified. -*--relative* _priority_:: -Specify a *relative* scheduling _priority_. Same as the standard POSIX *-n* option. _Priority_ gets _incremented/decremented_ by the given value. +*--relative* _delta_:: +Specify a relative priority. The actual scheduling priority gets incremented/decremented +by the given _delta_. (This is the same as the *-n* option when POSIXLY_CORRECT is set.) *-g*, *--pgrp*:: Interpret the succeeding arguments as process group IDs. @@ -83,21 +89,30 @@ to map user names to user IDs == NOTES -Users other than the superuser may only alter the priority of processes they own. Furthermore, an unprivileged user can only _increase_ the "nice value" (i.e., choose a lower priority) and such changes are irreversible unless (since Linux 2.6.12) the user has a suitable "nice" resource limit (see *ulimit*(1p) and *getrlimit*(2)). +Users other than the superuser may alter the priority only of processes they own. +Furthermore, an unprivileged user can only _increase_ the "nice value" (that is: +lower the urgency), and such changes are irreversible unless (since Linux 2.6.12) +the user has a suitable "nice" resource limit (see *getrlimit*(2)). The superuser may alter the priority of any process and set the priority to any value in the range -20 to 19. Useful priorities are: 19 (the affected processes will run only when nothing else in the system wants to), 0 (the "base" scheduling priority), anything negative (to make things go very fast). -For historical reasons in this implementation, the *-n* option did not follow the POSIX specification. Therefore, instead of setting a *relative* priority, it sets an *absolute* priority by default. As this may not be desirable, this behavior can be controlled by setting the environment variable POSIXLY_CORRECT to be fully POSIX compliant. See the *-n* option for details. See *--relative* and *--priority* for options that do not change behavior depending on environment variables. +For historical reasons, the *-n* option in this implementation does not follow the POSIX +specification: instead of setting a *relative* priority, it sets an *absolute* priority +by default. As this may not be desirable, this behavior can be changed by setting the +environment variable POSIXLY_CORRECT, to be fully POSIX compliant. See *--relative* and +*--priority* for options that do not change behavior depending on environment variables. == HISTORY The *renice* command appeared in 4.0BSD. -== EXAMPLES +== EXAMPLE -The following command would change the priority of the processes with PIDs 987 and 32, plus all processes owned by the users daemon and root: +The following command changes the priority of the processes with PIDs 987 and 32, plus all processes owned by the users daemon and root: +____ *renice +1 987 -u daemon root -p 32* +____ == SEE ALSO -- 2.48.1