zsh is free software.  See the file COPYING for copying permission.

This is zsh 2.1.0, written by Paul Falstad (pfalstad@phoenix.princeton.edu).

To get this shell running, cd into the src directory and type
"buildzsh".  I tested it on the following machines, where it compiled
just by running this script:

Sun SPARCServer 4/490 running SunOS 4.1.1
NeXTstation running Mach 2.0
DECSystem-5000 running ULTRIX 4.2
Sun 3/50M running SunOS 4.0
Iris 4D/20 running IRIX 3.3.1
Tahoe running BSD 4.3 tahoe
HP 9000/855 running HP-UX 8.0
HP 9000/370 running HP-UX 7.05

It should be easier to port the shell to different architectures now.
The reason it hasn't been tested on SysV-like machines is that I don't
have access to any SysV-like machines.  I'd love to have someone port
the shell to other architectures.

Tabstops are 3 spaces.  If you're going to look at my code, run it
though "expand -3" first, or set your tab stops to the same as mine.

If anyone has any questions, suggestions, comments, bugs, flames, or
any other mail of any kind, send it to pfalstad@phoenix.princeton.edu.

Thanks to the following people for help, ideas, comments, patches, etc.:
 
David Dobkin
Jim Mattson
Goran Larsson
Bart Schaefer
Paul E. Maisano
Norbert Kiesel
Josh Diamond
Peter Moore
Geoff Wing
Kent Dickey
Jean-Jacques Moreau
Michael Brown
Bruce Anderson
Carson Wilson (too bad my email to him bounces)
Stephen Dum
Lars E. Thon
Michael Brennan
Xev Gittler
Jarkko Hietaniemi
Zbigniew J Tyrlik
Pierre Racz
Rick Ohnemus
Richard Dean
Gary D. Kline
Robert A. Fabian
Byron Rakitzis
Gottfried Necker
Dan Bernstein
Vincent Granet
Jonathan I. Kamens & Bruce Varney
David Wilson
Peter Gray
Greg Noel
Paul Lew
Kartik Subbarao
Michael Marucheck
Christopher Pirazzi
Steve Giovanetti
Kennedy Lemke
Emin Gun Sirer
Kazuo Itoh
lots of other people, I'm sure

Modification history:

0.03-1.0:
	- "..../" is now "****/".  I know this isn't backward compatible,
	  but I had no choice; the string "..../" was unquotable.
	- parser was rewritten and improved
	- completion was improved, several bugs fixed (including
	  the "$([tab]" bug)
	- vi mode editing is improved
	- the value of PWD and OLDPWD in the environment now change
	- the PROMPT formatting strings %W and %D now print the month
	  correctly
	- >&2 echo "error message" no longer prints "bad file number"
	- ${foo%pat} no longer alters the value of foo
	- $_ works
	- ALL_EXPORT no longer causes let statements to crash the shell
	- continue works
	- echo $MAIL no longer dumps core if MAIL is null
	- the new tty driver is selected by default
	- the s modifier no longer complains if it can't find the string
	  to substitute
	- list-choices no longer fignores files
	- cd is now smarter about symlinks
	- negative subscripts other than -1 now work
	- $(<filename) works better if filename contains $, ~, or =
	- rehash no longer wastes memory
	- with name=value assignments, name is checked to see if it is
	  a valid identifier
	- !1; !2 no longer eats the semicolon
	- $foo:h never returns the empty string if foo starts with /
	- select crashed with some compilers
	- problems with aliases in <(...) constructs have been fixed
	- links pointing to nowhere are denoted with an '&' in listtypes
	- negative arguments are supported
	- the shell does not screw around with the tty so much
	- lots of other stuff

0.02-0.03:
	- two stupid bugs that were introduced in the last patch were fixed:
	  - multiple command substitution on a line failed
	  - a file descriptor leak caused the shell to crash after a while
	- added 'An Introduction to the Z Shell'
	- behaves properly when the tty session dies suddenly
	- had a serious memory leak on some systems
	- the test and [ builtins have been added, although [[...]]
	  is more efficient
	- in your prompt, %m2 now prints foo.bar, %m3 prints foo.bar.com, etc.
	- the -D and -P options to print have been added
	- the NULLCMD and ZDOTDIR parameters have been added
	- ${*:-foo} works
	- "$@" and "$arr[@]" work like ksh
	- .zprofile is sourced before .zshrc in login shells
	- the CSHJUNKIEQUOTES and PUSHDMINUS options have been added
	- REAL_TTY compilation switch added
	- aliases beginning with a space cause the history line to be junked
	  if HISTIGNORESPACE is set
	- echo prints bad options instead of complaining about them
	- "set -o" no longer dumps core
	- "alias a=alias; date >a" no longer creates a file called "alias"
	- "function foo() \n { date }" is now legal (the () and the newline
	  are allowed)
	- nested brace expressions work properly
	- disabled commands stay disabled after a rehash (or after the shell
	  finishes sourcing your .zshrc)
	- corrected aliases work
	- executables in the currect directory are now completed
	- in "case foo", "foo" is not interpreted as a directory name with autocd
	- aliases were not always interpreted properly after a completion
	- bindkey '^?' didn't work
	- echo ${HOST:-{bar}} didn't work
	- editor update is more efficient in some cases
	- menucomplete works even better
	- assign to an array element "foo[1]=bar" didn't always work
	- doesn't print directories like "~tmp" if HOME=/
	- quotes in case statement patterns caused problems
	- pressing ^C right after typing "fc" caused the editor to share
	  the tty with the shell
	- echo $(echo 2) produced no output, but echo $(echo x) worked fine (weird)

0.01-0.02:
	- added script to convert most csh aliases to zsh aliases or functions
	- fc -l (history) now appears in the history itself; HISTNOSTORE
	  option added to get old behavior
	- the POSIX process group race has been fixed; so 'w | more' should
	  no longer hang
	- FCEDIT added, to match the documentation
	- %{...%} in the prompt added
	- execute-named-cmd and execute-last-named-cmd bindings added
	- sources ~/.zshenv in all shells, even if not interactive, unless
	  -f is given
	- ^ and # are no longer `magic' by default; use EXTENDEDGLOB option
	  to use them
	- now checks for tty sanity before each command
	- if the right side of a variable assignment expands to more than
	  one word, array assignment is assumed; so foo=*.c now works
	- ~foo is no longer expanded in completion
	- select now works even if the argument list is not sorted
	- menucompletebeep option added
	- emacs mode is now 8-bit clean by default; use bindkey -em
	  to get your meta key back
	- fc -R, fc -W added
	- nocorrect added
	- lines from history file are now split into words at spaces
	- glob-complete, accept-and-menu-complete,
	  beginning-of-line-hist, end-of-line-hist bindings added
	- insert-last-word bound to M-. in emacs mode by default; now moves
	  back through the history if run repeatedly
	- J and K now bound to history search in vi mode
	- delete-char no longer core dumps on an empty line
	- menu-complete works better
	- the editor checks the settings of VISUAL and EDITOR to set
	  default bindings
	- using [[ ... ]] expressions on a symbolic link works as expected
	- various problems with globbing were fixed
	- xx is now the same as !! if HISTCHARS=x
	- added config.h entry for compilers that don't know about void *
	- lexical analysis made more efficient
	- "if echo $? ; then : ; fi" no longer always prints 0
	- removed all enums, '\x7f's from code
	- in "case foo in bar) xxx ;; esac", foo and bar are no longer subject
	  to command alias expansion
	- works on platforms where toupper('A') != 'A'
	- \e sequence added to echo
	- + options now work with set
	- AUTORESUME and AUTOCD work better
	- getopts works better (?)
	- spell checking works better
	- "let 2+3=" no longer crashes the shell
	- "foo=bar; echo ${=foo}" no longer crashes the shell
	- "zsh -c" or "zsh -o" no longer causes a core dump
	- "unset MAIL; echo $MAIL" no longer causes a core dump
	- "(xterm&xterm&)&" no longer causes a core dump
	- "echo $HOM[tab]" beeps instead of deleting "$HOM"
	- incremental history search works better
	- the pwd of a fg'd job is now printed _before_ resuming it
	- rv=`echo -n foo` no longer puts garbage in $rv
	- "=1/*" now works as expected
	- ^Z can now be bound to something
	- the STTY parameter and the builtin builtin are now documented
	- IFS=x; foo=`echo foo` no longer puts a newline in $foo
	- $status added for csh compatibility
	- arrays are automatically expanded if you say 'foo[1234]=x'
	- shell now ignores SIGQUIT (it was commented out before :-)
	- the times builtin works on systems where times() returns > 0
	- no longer hangs the terminal if you ^S before flow control
	  is turned off
	- "date ; read foo" now works in interactive shells
	- <<-foo is now parsed as <<- foo, not << -foo
	- fixed various errors in the documentation

0.00-0.01:
	- %M and %m now work as documented.
	- bad things no longer happen if COLUMNS is set to 0
	- SH_WORD_SPLIT and ${=foo} now work
	- the default value of WORDCHARS includes more characters
	- if the cursor is at the end of the line, vi-cmd-mode
	  moves it back one position.
	- delete-char now acts more like x in vi.
	- a "prompt" parameter has been added, which is equivalent to
	  PROMPT and PS1.
	- zsh no longer expands symbolic links.  The CHASELINKS option
	  has been provided to get the old behavior.
	- history searches ignore lines that are the same as the line
	  in the buffer.
	- you can get a literal ! in your prompt now with \!.
	- -z, -n, and != in [[ ... ]] expressions work.
	- the shell no longer hangs when inputting "[[ ]\n"
	- the "menu-complete" and "menu-expand-or-complete" bindings have
	  been added.
	- menu-complete no longer beeps.
	- reverse-menu-complete no longer dumps core if it gets called before
	  a normal completion.
	- typeahead lines are no longer thrown away on machines with sgttyb.
	- !foo no longer matches lines with 'foo' in them (not at the beginning)
	- kill -9 % no longer kills the shell
	- no longer sources .zshrc from shell scripts or with -c
	- no longer needs limits.h, strtol
	- exporting HOSTTYPE, etc. works
	- fixed serious bugs related to . in path
	- numbers in weird bases now work

Known Bugs
	- terminal acts weird under OpenWindows cmdtool
	- xterm run in background inherits bad terminal modes
	- here documents don't appear in the history, and cannot be
	  used inside eval statements