Appendix A Summary of Changes by Release

This appendix summarizes the changes made to Qshell in each release of OS/400.

V5R2

In V5R2, many utilities, variables , and operators were added or modified. These are listed in the following tables. In addition, support was added for CCSIDs 425, 905, 1026, 1097, and 1155.

New Utilities
attr	Get or set a file's attributes.
builtin	Run a built-in utility.
dataq	Send or receive data queue messages.
datarea	Read or write a data area.
declare	Declare variables and set attributes.
help	Display help for a built-in utility.
iconv	Convert characters from one CCSID to another.
ipcrm	Remove the interprocess communication ID.
ipcs	Report the interprocess communication status.
locale	Get locale-specific information.
mkfifo	Make special files FIFO.
nohup	Run a utility without a hangup.
printenv	Display the values of environment variables.
ps	Display the process status.
rexec	Run a remote command.
rexx	Run a Rexx procedure.
Rfile	Read or write record files.
source	Run commands in the current shell. (This is the same as the "dot" command.)
tar	Archive files.
type	Find the type of command.
typeset	Provide an alternative form of declare.
ulimit	Set or display resource limits.

Modified Utilities
exec	Added -c option
hash	Added -p option
trap	Added -l option
uname	Added -m option
xargs	Added -E, -e, -L, and -l options

New Predefined Variables
EGUID	Holds the effective primary group ID
EUID	Holds the effective user ID
GID	Holds the primary group ID
HOSTID	Holds the IP address of the host
HOSTNAME	Holds the name of the host
HOSTTYPE	Holds the type of host
MACHTYPE	Holds the type of machine
OSTYPE	Holds the type of operating system
PS3	Provides the prompt used by the select command
QIBM_CCSID	Holds the CCSID for translation
QIBM_QSH_CMD_ESCAPE_MSG	Sends escape messages from QSH CL command
QIBM_QSH_CMD_OUTPUT	Controls output of QSH CL command
QIBM_QSH_INTERACTIVE_CMD	Provides the initial interactive command
QIBM_QSH_INTERACTIVE_TYPE	Holds the type of interactive session
QIBM_SYSTEM_ALWMLTTHD	Allows multithread capable job
UID	Holds the user ID

Operators

Extended conditional construct [[ ]]

New syntax for functions

Select construct added

Substring word expansion

Substitute string for pattern word expansion

Tilde expansion updated

V5R1

The following tables list the utilities that were added or modified in V5R1. In addition, the TRACEFILE predefined variable was added to hold the path name of a trace file.

New Utilities
cmp	Compare files.
compress	Compress data.
dspmsg	Send output from a message catalog.
file	Determine the file type.
od	Provide a file dump.
pax	Run the portable archive exchange.
sed	Run the stream editor.
setccsid	Set a file's CCSID attribute.
sysval	Retrieve system values or network attributes.
tr	Translate characters .
uncompress	Expand compressed data.
wc	Count words, lines, or characters.
zcat	Expand and concatenate data.

Modified utilities
getconf	Four new operands were added:
	CCSID	Coded character-set ID
	PAGE_SIZE, PAGESIZE	Hardware page size
	PIPE_BUF	Maximum number of bytes that can be written automatically to a pipe
getjobid	-s option added to display qualified job name in a short format
ls	-S option added to display a file's CCSID attribute

V4R4

The following tables list the changes to utilities, variables , APIs, and operators that were made in V4R4. In addition, the system utility was modified with the addition of options n and q .

New Utilities
ajar	Create an alternative Java archive.
basename	Return the non-directory portion of a path name .
cat	Concatenate and print files.
chmod	Change file modes.
chgrp	Change file group ownership.
chown	Change file ownership.
clrtmp	Clear the /tmp directory.
cp	Copy files.
date	Print the date and time.
dirname	Return the directory portion of a path name.
env	Set the environment for command invocation.
expr	Evaluate arguments as an expression.
find	Search a file hierarchy.
getjobid	Display job information.
grep	Search files for a pattern.
head	Copy the first part of files.
hostname	Display the name of the host system.
id	Return user identifiers.
let	Evaluate an arithmetic expression.
ln	Link files.
logger	Log messages to QHST.
logname	Display the user's login name.
ls	List directory contents.
mkdir	Create a directory.
mv	Move or rename a file.
pr	Print files to standard output.
pwdx	Print the working directory, expanded, to standard output.
rmdir	Remove a directory.
rm	Remove a link.
split	Split files into pieces.
tail	Copy the last part of files.
tee	Duplicate standard input.
touch	Change file-access and modification times.
uname	Display the system name on the standard output device.
uniq	Report or filter out unique names in a file.
whence	Determine how a command is interpreted.

New Predefined Variables
QSH_REDIRECTION_CODE-PAGE	Code page for file redirection
QSH_REDIRECTION_TEXTDATA	Data processed as text for file redirection

New APIs
QzshSystem()	Run a Qshell command.
QzshCheckShellCommand()	Find a Qshell command.

Operators

Parameter expansion operators #, ##, %, %% added

Greatly enhanced arithmetic expressions

Support for floating-point arithmetic

V4R3

In V4R3, the following changes were made:

• The liblist utility was added to manage library lists.
• The test utility was modified with the addition of the -N option to check for native objects.
• The QSH_VERSION predefined variable was added for the current Qshell version.
• The QSH_USE_PRESTART_JOBS predefined variable was added to give the ability to use prestart jobs when available.
• National language support was added for CCSIDs 11401149, for Euro currency.