Patch Name: PHCO_30728

Patch Description: s700_800 11.00 awk(1) cumulative patch

Creation Date: 04/04/14

Post Date: 04/05/17

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

Products: N/A

Filesets:
	OS-Core.CORE-ENG-A-MAN,fr=B.11.00,fa=HP-UX_B.11.00_32/64,v=HP
	OS-Core.UX-CORE,fr=B.11.00,fa=HP-UX_B.11.00_32/64,v=HP

Automatic Reboot?: No

Status: General Release

Critical:
	Yes
	PHCO_30728: MEMORY_LEAK

Category Tags:
	defect_repair general_release critical memory_leak

Path Name: /hp-ux_patches/s700_800/11.X/PHCO_30728

Symptoms:
	PHCO_30728:
	1. Memory leak in awk(1) when calling in-built
	   functions.

	2. awk(1) does not place full path in ARGV[0] when
	   executing as /usr/bin/awk under UNIX95.

	PHCO_27521:
	1.awk(1) reports incorrect error messages like "awk: xxxxxx
	  cannot be used as an array" even if run on scripts that
	  have proper array variables defined.

	2.In multibyte environment awk(1) recognizes some extra
	  characters in conjunction with blank, tab and newline as
	  default field separators.

	3.awk(1) doesn't recognize numbers with leading blanks in
	  relational operations.

	PHCO_24285:
	1.awk(1) incorrectly formats unsigned numbers.

	2.awk(1) reports only integer results with modulo operator.

	3.Concatenating null string does not force string comparison
	  in awk(1).

	4.Concatenating null string does not force type string of
	  argument to awk(1) printf %c.

	5.printf statement in awk(1) returns wrong results if an
	  array with string subscript is passed in a for loop.

	6.awk(1) dumps core if number of elements in an array is
	  large.

	7.awk(1) output field separator not inserted in output
	  unless $0 is touched.

Defect Description:
	PHCO_30728:
	1.The allocated  memory is not being freed by awk(1).
	  This is observed when awk(1) calls
	  toupper/tolower/substr/[s]printf() inbuilt functions.
	  The memory allocated for the conversion of strings
	  was not freed and hence resulted in memory leak.

	Resolution:
	  The problem is resolved by freeing the allocated memory
	  for the conversion of strings.

	2. awk(1) keeps truncated pathname of the invoking process
	   if the process was invoked with complete pathname.
	   If awk(1) is invoked with path (relative or absolute),
	   awk(1) stores truncated value in ARGV[0]. The path
	   (relative or absolute) is removed and only 'awk' is
	   stored in ARGV[0]. The defect can be reproduced by
	   the following steps:

	   $export UNIX95=1
	   $/usr/bin/awk 'BEGIN { print ARGV[0] ; exit }'
	    awk

	   The expected output is  /usr/bin/awk.
	Resolution:
	   The variable which stores the value is corrected to store
	   the complete path name under UNIX95.

	PHCO_27521:
	1.awk(1) can generate incorrect error messages due to
	  improper internal memory management.
	Resolution:
	  For proper memory management in awk(1), a new variable has
	  been introduced to differentiate between active and unused
	  (free) memory nodes.

	2.awk(1) documentation says that default FS are blank, tab
	  and newline. But for multibyte locale awk(1) recognizes
	  other characters too as FS.
	  Steps:
	  $ export LANG=ja_JP.SJIS
	  $ echo "This i\rs\tawk t\vest" | awk '{printf("%s/%s/%s/
	    %s\n",$1,$2,$3,$4);}'
	  This/i/s/awk   <=== This is wrong

	  The output should be :
	  s/awk/t
	         est
	Resolution:
	  For multibyte locale, awk(1) used to treat the <space> set
	  as FS set. Instead of this, changes have been made to
	  check <blank> set (containing blank,\t and alternate
	  blank characters) and newline character.

	3.In case any of the operands in relational operation
	  contain leading blanks, awk(1) performs string comparison.
	  This is true even if the operand has a numeric value,
	  after ignoring the leading and trailing blanks.
	  Steps:
	  $ export UNIX95=1
	  $ awk 'BEGIN {a=" 0.1";if(a>0.01){print "True"}else{print
	    "False"}}'
	  False   <=== It should print "True"
	  $
	Resolution:
	  Changes have been made to perform string comparisons only
	  when both the operands are strings else if any of the
	  operands is numeric, numeric comparison is carried out.
	  This fix is required to conform to UNIX95 standards, hence
	  it is available only when the UNIX95 flag is set. If
	  UNIX95 flag is unset then awk will retain the earlier
	  behavior.

	PHCO_24285:
	1.awk(1) incorrectly formats unsigned numbers.
	Resolution:
	  A new flag is added to take care of formatting unsigned
	  numbers.

	2.The % (modulo) operator gives integer result for decimal
	  values. The problem was due to the typecasting of the
	  output to an integer value.
	Resolution:
	  Typecasting of the output is removed to solve the problem.

	3.awk(1) used to ignore explicit stringizing operator from
	  the input considering them as number. Because of this,
	  strings like 006008E1"" got converted into corresponding
	  float values.
	Resolution:
	  Code is changed to do string comparison instead of numeric
	  comparison when explicit stringizing operator is used in
	  input.

	4.awk(1) should recognize "" as a stringizing operator when
	  given with the printf statements with %c formatter.
	Resolution:
	  awk(1) is  corrected to interpret the stringizing operator
	  "" properly when included with the %c formatter.

	5.awk(1) was converting the array subscript to "number"
	  type, which was supposed to be  processed as "string"
	  type.
	Resolution:
	  Code is changed to preserve the data type of the array
	  subscript by setting a flag. While printing, this flag is
	  checked to print the correct output.

	6.awk(1) produces memory leak if number of elements in an
	  array is large. The process grows until maxdsize is
	  reached and awk(1) coredumps.
	Resolution:
	  A call to free(2) is  introduced to take care of this.

	7.awk(1) output field separator not inserted in output
	  unless $0 is touched.
	Resolution:
	  The OFS is inserted in the output if construct like
	  "$1=$1" is used and hence the problem is corrected.

Enhancement:
	No

SR:
	8606352231 8606335428 8606268592 8606257112 8606212881
	8606157561 8606127663 8606108449 5003400713 8606178380
	5003455592 8606100812 1653298844 1653265835 1653232835

Patch Files:
	
	OS-Core.CORE-ENG-A-MAN,fr=B.11.00,fa=HP-UX_B.11.00_32/64,
		v=HP:
	/usr/share/man/man1.Z/awk.1

	OS-Core.UX-CORE,fr=B.11.00,fa=HP-UX_B.11.00_32/64,v=HP:
	/usr/lib/nls/msg/C/awk.cat
	/sbin/awk
	/usr/bin/awk

what(1) Output:
	
	OS-Core.CORE-ENG-A-MAN,fr=B.11.00,fa=HP-UX_B.11.00_32/64,
		v=HP:
	/usr/share/man/man1.Z/awk.1:
		None

	OS-Core.UX-CORE,fr=B.11.00,fa=HP-UX_B.11.00_32/64,v=HP:
	/usr/lib/nls/msg/C/awk.cat:
		None

	OS-Core.UX-CORE,fr=B.11.00,fa=HP-UX_B.11.00_32/64,v=HP:
	/sbin/awk:
		$Revision: 82.2.1.17 $
		$ PATCH/11.00:PHCO_19491  Aug  9 1999 09:49:32 $
		PATCH_11_00: awk.g_s.o awk.lx_s.o b_s.o main_s.o tra
			n_s.o lib_s.o run_s.o parse_s.o proctab_s.o 
			hpux_rel_s.o 04/04/14

	OS-Core.UX-CORE,fr=B.11.00,fa=HP-UX_B.11.00_32/64,v=HP:
	/usr/bin/awk:
		$Revision: 82.2.1.17 $
		PATCH_11_00: awk.g.o awk.lx.o b.o main.o tran.o lib.
			o run.o parse.o proctab.o hpux_rel.o 04/04/1
			4

cksum(1) Output:
	
	OS-Core.CORE-ENG-A-MAN,fr=B.11.00,fa=HP-UX_B.11.00_32/64,
		v=HP:
	4204420571 8889 /usr/share/man/man1.Z/awk.1

	OS-Core.UX-CORE,fr=B.11.00,fa=HP-UX_B.11.00_32/64,v=HP:
	536183147 7578 /usr/lib/nls/msg/C/awk.cat

	OS-Core.UX-CORE,fr=B.11.00,fa=HP-UX_B.11.00_32/64,v=HP:
	2665758479 413696 /sbin/awk

	OS-Core.UX-CORE,fr=B.11.00,fa=HP-UX_B.11.00_32/64,v=HP:
	380806642 143360 /usr/bin/awk

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies: None

Supersedes:
	PHCO_24285 PHCO_27521

Equivalent Patches: None

Patch Package Size: 300 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_30728

	5. Run swinstall to install the patch:

		swinstall -x autoreboot=true -x patch_match_target=true \
			  -s /tmp/PHCO_30728.depot

	By default swinstall will archive the original software in 
	/var/adm/sw/save/PHCO_30728.  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_30728.text file is 
	available in the product readme:

		swlist -l product -a readme -d @ /tmp/PHCO_30728.depot

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

		dd if=/tmp/PHCO_30728.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None