Patch Name: PHKL_21674

Patch Description: s700 10.20 Async driver cumulative patch

Creation Date: 00/05/08

Post Date:  00/05/09

Hardware Platforms - OS Releases:
	s700: 10.20

Products: N/A

Filesets:
	OS-Core.CORE-KRN

Automatic Reboot?: Yes

Status: General Release

Critical: No

Path Name: /hp-ux_patches/s700/10.X/PHKL_21674

Symptoms:
	PHKL_21674:
	(SR: 8606112739   CR: JAGab88679)
	Async driver I/O completion notifications don't work when
	used in conjunction with select(2) system call.

	PHKL_10163:
	If a user process changes its process group after opening
	the async driver, all subsequent requests will be refused
	with an EBUSY error.

Defect Description:
	PHKL_21674:
	(SR: 8606112739   CR: JAGab88679)
	Async driver's IO completion flag notification was checked
	in wrong sequence, when used in conjunction with select.

	Resolution:
	Changed sequence to check for IO notification flag
	before checking other types of IO completions.

	PHKL_10163:
	The code that used to check for being called by the opening
	process was changed to check the process group, instead.  It
	now checks both.

SR:
	5003359133 8606112739

Patch Files:
	/usr/conf/lib/libhp-ux.a(async.o)

what(1) Output:
	/usr/conf/lib/libhp-ux.a(async.o):
		async.c    $Date: 2000/05/08 17:43:19 $ $Revision: 1
			.13.98.19 $ PATCH_10.20 (PHKL_21674)

cksum(1) Output:
	472002128 16624 /usr/conf/lib/libhp-ux.a(async.o)

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies: None

Supersedes:
	PHKL_10163

Equivalent Patches:
	PHKL_21675:
	s800: 10.20

	PHKL_20515:
	s800: 11.00

Patch Package Size: 80 KBytes

Installation Instructions:
	Please review all instructions and the Hewlett-Packard
	SupportLine User Guide or your Hewlett-Packard support terms
	and conditions for precautions, scope of license,
	restrictions, and, limitation of liability and warranties,
	before installing this patch.
	------------------------------------------------------------
	1. Back up your system before installing a patch.

	2. Login as root.

	3. Copy the patch to the /tmp directory.

	4. Move to the /tmp directory and unshar the patch:

		cd /tmp
		sh PHKL_21674

	5a. For a standalone system, run swinstall to install the
	    patch:

		swinstall -x autoreboot=true -x match_target=true \
			-s /tmp/PHKL_21674.depot

	By default swinstall will archive the original software in
	/var/adm/sw/patch/PHKL_21674.  If you do not wish to retain a
	copy of the original software, you can create an empty file
	named /var/adm/sw/patch/PATCH_NOSAVE.

	WARNING: If this file exists when a patch is installed, the
	         patch cannot be deinstalled.  Please be careful
		 when using this feature.

	It is recommended that you move the PHKL_21674.text file to
	/var/adm/sw/patch for future reference.

	To put this patch on a magnetic tape and install from the
	tape drive, use the command:

		dd if=/tmp/PHKL_21674.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None