This file details the changes between the previous release of CWRU bash
(07/11/93) and this release.

1. Bugs Fixed

Readline's vi-mode once again has TAB bound to completion; entering `posix
mode' changes it to self-insert

Bash now binds its special emacs-mode functions directly into
emacs_meta_keymap so that eight-bit character handling does not interfere

Some source restructuring: more extern functions are defined in header files
and not in C source files

The handling of `line number' inside functions is now more correct and
closer to reality

Some functions of `general use' were moved to general.c (vfree,
full_pathname)

A bug that caused some redirections to be applied twice was fixed in
execute_command_internal (dispose of redirection_undo_list after copying it;
ditto for exec_redirection_undo_list)

The exit status of a command that is not found is 126, as Posix.2 specifies

More speed improvements -- bash now runs as fast as the SunOS sh on
Haertel's `shell benchmark'

Instead of returning pointers to -1, bash and the readline, history, and
glob libraries now return pointers to special `error pointers', which the
calling code checks for in place of -1

Fixed a problem with canonicalize_pathname which made it get
confused with xxx/./yyy if yyy was `.' or `..'

Fixes to make bash recognize SVR4.2 and set USGr4_2 for SVR4.2 systems

Fixes to the HP/UX machine descriptions to make alloca work on HPUX_9
and to avoid `M_MACHINE redefined' warnings

Fixes to the CRAY machine description

Fixes to the mailpath code to make it Posix.2-compliant -- backslash
may now quote `%' and `?' 

The namespace was further cleaned up, and more functions and variables
were made static

On systems with S_IFSOCK or S_ISSOCK defined in sys/stat.h, bash checks
whether fd 0 is a socket to decide whether or not it's being started by
rshd and to run the startup files

Bash now gives the signal mask it inherits to its children -- previously,
login shells cleared the signal mask

cpp-Makefile and subst.c both used the `USE_GLOB_LIBRARY' define, but
with different meanings; subst.c now uses `USE_POSIX_GLOB_LIBRARY'

Fixed pattern substitution so that ${a%%$b}, where b was unset, no longer
causes a core dump

Changed the `test_exit' define in test.c to no longer use `longjmp' as
the rhs or a comma-ized expression; this causes core dumps on some
optimizer/machine combinations

A speed hack in variables.c: if no local variables are defined for a level
of shell context, kill_all_local_variables does not need to search the
whole variable hash table when popping a context

Fixed the `bind' builtin so that -m now changes the keymap for all of the
subsequent operations

Changed some more builtins to use internal_getopt: bind, command, export,
readonly, declare, typeset

Fixed fc to use the Posix.2 format for listing commands in the
history list

Changed bg to set `!', as Posix.2 specifies

Fixed ulimit.def to compile if RLIMIT_RSS is not defined,
as some systems seem to have it

Replaced lib/malloc/alloca.c with the version from emacs 19.  The old one
lives in alloca.c.old

malloc.c now uses the ANSI C features to `stringize' macro arguments if
__STDC__ is defined

Fixes to the GNU malloc library from glibc 1.06 and Mike Haertel

Fixes to readline key binding and lookup for Cray systems, which don't
like the casting that readline does

Fixes to all readline library source files to clean up the code: make sure
`int'-returning functions use `return x;' rather than `return;', declare all
arguments, even the `int' ones, and make some functions void.  Cleaned up
the code formatting a little, too.

The readline completer now double-quotes filenames with special word-break
characters, so that tilde expansion still works

^C now breaks out of keyboard macros

If being compiled as part of the shell, readline no longer attempts to
handle SIGTTIN, SIGTTOU, or SIGTSTP

tilde_expansion_failure_hook is now a CPFunction rather than a Function,
since that's how it's used

Readline vi-mode `change case' function now skips over characters which
are neither upper nor lower case

Readline vi-mode now allows replacement to be redoable with `.'

2. New Features

A `strict Posix.2' mode, enabled with the -posix startup option or
setting the POSIXLY_CORRECT variable (see CWRU/POSIX.NOTES for a 
description of the changed behavior)

`ONESHOT' is now an option in config.h

cpp-Makefile assumes that fixed header files are present if gcc is being
used

The redirections attached to a function declaration are now part of that
function, applied when the function is executed, as specified by Posix.2.
This caused a change to parse.y that resulted in 66 shift/reduce
conflicts(!)

All of the OP= functions that Posix.2 specifies are now implemented for
both `let' and arithmetic substitution

The `command' builtin has acquired the Posix.2 `-v' and `-V' options
(this shares code with the `type' builtin)

A new `bash_builtins' man page, like the `csh_builtins' page on some
systems