Patch Name: PHCO_28246

Patch Description: s700_800 11.00 script(1) cumulative patch

Creation Date: 03/01/09

Post Date:  03/01/29

Hardware Platforms - OS Releases:
	s700: 11.00
	s800: 11.00

Products: N/A

Filesets:
	OS-Core.CMDS-AUX,fr=B.11.00,fa=HP-UX_B.11.00_32/64,v=HP

Automatic Reboot?: No

Status: General Release

Critical:
	Yes
	PHCO_28246: HANG

Category Tags:
	defect_repair general_release critical halts_system

Path Name: /hp-ux_patches/s700_800/11.X/PHCO_28246

Symptoms:
	PHCO_28246:
	script(1) hangs when interrupted immediately upon execution.

	PHCO_24694:
	When a large chunk of data is pasted in a script session,
	script is giving an error "tty write error". Also, there is
	data loss in its log file.

Defect Description:
	PHCO_28246:
	script(1) hangs, when SIGINT or SIGQUIT is sent
	immediately, after it is invoked at command prompt.

	Steps to reproduce the problem are as follows:
	1. invoke script
	   $ script <file_name>
	2. send SIGINT (^C) immediately.

	The time gap between step 1 and step 2 is very small.
	So, this is very difficult to reproduce.

	Resolution:
	The signal handling for interrupt is corrected. The signals
	are queued up before script(1) execs a shell.

	PHCO_24694:
	When a large chunk of data is pasted on a script session,
	script is giving an error "tty write error".
	This was because, script(1) was trying to write data to
	file descriptors, which are not ready for write. Also there
	is some data loss, because there is no input flow control.

	Steps to reproduce the problem are as follows:
	1. On a fresh terminal, start script.
	2. cat > cat.out 2>cat.err
	3. Type a buffer of at least 110x50 characters repeatedly.
	4. Make sure that there is no "tty write error"
	5. Exit from script by ^D^D and check whether the data
	   present in cat.out is same as the one pasted.

	Resolution:
	Now, script(1) is made to use select(2) to check whether
	the file descriptors are ready for write or not, and then
	write the data. Also, an environmental variable
	SCRIPT_USE_IXOFF has been added, by setting this
	environmental variable before running the script,
	the input flow control can be enabled.

Enhancement:
	No

SR:
	8606284424 8606197905

Patch Files:
	
	OS-Core.CMDS-AUX,fr=B.11.00,fa=HP-UX_B.11.00_32/64,v=HP:
	/usr/bin/script

what(1) Output:
	
	OS-Core.CMDS-AUX,fr=B.11.00,fa=HP-UX_B.11.00_32/64,v=HP:
	/usr/bin/script:
		$Revision: 76.2.2.8 $
		PATCH_11_00: script.o 03/01/09

cksum(1) Output:
	
	OS-Core.CMDS-AUX,fr=B.11.00,fa=HP-UX_B.11.00_32/64,v=HP:
	362930513 24576 /usr/bin/script

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies: None

Supersedes:
	PHCO_24694 

Equivalent Patches: None

Patch Package Size: 50 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 PHCO_28246

	5. Run swinstall to install the patch:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -s /tmp/PHCO_28246.depot

	By default swinstall will archive the original software in 
	/var/adm/sw/save/PHCO_28246.  If you do not wish to retain a
	copy of the original software, include the patch_save_files
	option in the swinstall command above:

		-x patch_save_files=false

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

	For future reference, the contents of the PHCO_28246.text file is 
	available in the product readme:

		swlist -l product -a readme -d @ /tmp/PHCO_28246.depot

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

		dd if=/tmp/PHCO_28246.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None