Imported from ../bash-2.04.tar.gz.

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@@ -1,3 +1,609 @@
+This document details the changes between this version, bash-2.04-release,
+and the previous version, bash-2.04-beta5.
+
+1.  Changes to Bash
+
+a.  Better compile-time and configure-time checks for the necessity of
+    inet_aton().
+
+b.  A bug was fixed in the expansion of "${@:-}" when there are positional
+    parameters.
+
+c.  A typo was fixed in the output of `complete'.
+
+d.  The matches generated for a word by the `-W' argument to complete and
+    compgen are now matched against the word being completed, and only
+    matches are returned as the result.
+
+e.  Some fixes were made for systems which do not restart read(2) when a
+    signal caught by bash is received.
+
+f.  A bug was fixed which caused the umask to be set to 0 when an invalid
+    symbolic mode mask was parsed.
+
+g.  Fixed a bug that could cause a core dump if a SIGCHLD was received while
+    performing an assignment statement using command substitution.
+
+h.  Changed the word splitting function for programmable completion so cases
+    in which the cursor is between words are handled a bit better.
+
+2.  Changes to Readline
+
+a.  rl_funmap_names() is now documented.
+
+3.  New Features in Bash
+
+a.  The LC_NUMERIC variable is now treated specially, and used to set the
+    LC_NUMERIC locale category for number formatting, e.g., when `printf'
+    displays floating-point numbers.
+
+------------------------------------------------------------------------------
+This document details the changes between this version, bash-2.04-beta5,
+and the previous version, bash-2.04-beta4.
+
+1.  Changes to Bash
+
+a.  A couple of changes were made to the Makefiles for easier building on
+    non-Unix systems.
+
+b.  Fixed a bug where the current prompt would be set to $PS2 at startup.
+
+c.  The shell script that tests an already-installed version was changed to
+    remove the directory it created its test programs in at exit.
+
+d.  Several changes were made to the code that tokenizes an input line for
+    the programmable completion code.  Shell metacharacters will now appear
+    as individual words in the word list passed to the completion functions.
+    Some of the example completion shell functions were changed to understand
+    redirection operators.
+
+e.  A bug was fixed that, under obscure circumstances, could confuse the
+    parser when a shell function was run by the programmable completion code.
+
+f.  A bug was fixed in the ulimit builtin for systems not using getrlimit().
+
+g.  The execution code now propagates the correct exit status back to the rest
+    of the code if the return value of a subshell command was being inverted.
+    Some new test cases for inverting return values with the `!' reserved
+    word have been added.
+
+h.  Negative exponents in the arithmetic evaluation of v**e now return an
+    evaluation error.
+
+i.  A bug that caused bash to check the wrong process in a pipeline for
+    abnormal termination (and consequently resetting the terminal attributes)
+    was fixed.
+
+j.  Fixed a bug that caused $PS2 to be displayed after PROMPT_COMMAND was
+    executed.
+
+2.  Changes to Readline
+
+1.  Fixed a bug in a C preprocessor define that caused the keypad control
+    functions to be compiled out for all platforms except DJGPP.
+
+------------------------------------------------------------------------------
+This document details the changes between this version, bash-2.04-beta4,
+and the previous version, bash-2.04-beta3.
+
+1.  Changes to Bash
+
+a.  A couple of changes were made to the redirection to attempt to avoid
+    race conditions and malicious file replacement.
+
+2.  A change was made to the string evaluation code (used for command 
+    substitution, `eval', and the `.' builtin) to fix an obscure core
+    dump on alpha machines.
+
+3.  A bug that caused $LINENO to be wrong when executing arithmetic for
+    commands was fixed.
+
+4.  A couple of memory leaks in the programmable completion code were fixed.
+
+5.  A bug that could cause a core dump by freeing memory twice during a call
+    to `eval' if `set -u' had been enabled and an undefined variable was
+    referenced was fixed.
+
+------------------------------------------------------------------------------
+This document details the changes between this version, bash-2.04-beta3,
+and the previous version, bash-2.04-beta2.
+
+1.  Changes to Bash
+
+a.  Bash should run the appropriate startup files when invoked by ssh2.
+
+b.  Fixed a bug in the parsing of conditional commands that could cause a
+    core dump.
+
+c.  Fixed a bug in parsing job specifications that occasionally caused
+    core dumps when an out-of-range job was referenced.
+
+d.  Fixed the `type' and `command' builtins to do better reporting of
+    commands that are not found in $PATH or the hash table.
+
+e.  Fixed a POSIX.2 compliance problem in the command builtin -- commands
+    are supposed to be reported as full pathnames.
+
+f.  The `echo' builtin now returns failure if a write error occurs.
+
+g.  Fixed a bug which caused the locale to not be reset correctly when
+    LC_ALL was unset.
+
+h.  Changed description of `getopts' in man page and reference manual to make
+    it clear that option characters may be characters other than letters.
+
+i.  If the shell exits while in a function, make sure that any trap on EXIT
+    doesn't think the function is still executing.
+
+j.  Bashbug now tries harder to find a usable editor if $EDITOR is not set,
+    rather than simply defaulting to `emacs'.
+
+k.  Changes to the scripts that guess and canonicalize the system type, from
+    the latest `automake' distribution via Debian.
+
+l.  When using named pipes for process substitution, make sure the file
+    descriptors opened for reading are set to non-blocking mode.
+
+m.  Fixed a bug that caused termination of pipelines that are killed by a
+    signal to not be reported in some cases.
+
+n.  When not in literal-history mode, shell comment lines are not added to
+    the history list.
+
+o.  When running in POSIX.2 mode, bash no longer performs word splitting on
+    the expanded value of the word supplied as the filename argument to
+    redirection operators.
+
+p.  The prompt string decoding code now backslash-quotes only characters that
+    are special within double quotes when expanding the \w and \W escape
+    sequences.
+
+q.  Fixed a bug in the prompt decoding code that could cause a non-interactive
+    shell to seg fault if `\u' was used in PS4 and the shell was in xtrace
+    mode.
+
+r.  Fixed a bug that caused function definitions to be printed with any
+    redirections that should be attached to the entire function before the
+    closing brace.
+
+s.  Changed the tilde expansion code for Cygwin systems to avoid creating
+    pathnames beginning with `//' if $HOME == `/'.
+
+t.  Fixed a couple of autoconf tests to avoid creating files with fixed names
+    in /tmp.
+
+u.  The `trap' and `kill' builtins now know the names of the POSIX.1b real-
+    time signals on systems which support them.
+
+2.  Changes to Readline
+
+a.  Fixed a problem with the single-quote quoting function that could cause
+    buffer overflows.
+
+b.  Fixed a bug that caused incorrect `stat characters' to be printed if
+    the files being completed were in the root directory and visible-stats
+    was enabled.
+
+3.  New Features in Bash
+
+a.  There is a new `rbash.1' manual page, from the Debian release.
+
+b.  The `--enable-usg-echo-default' option to `configure' has been renamed to
+    `--enable-xpg-echo-default'.  The old option is still there for backwards
+    compatibility.
+
+------------------------------------------------------------------------------
+This document details the changes between this version, bash-2.04-beta2,
+and the previous version, bash-2.04-beta1.
+
+1.  Changes to Bash
+
+a.  Fixed a bug that could cause pipes to be closed inappropriately in
+    some obscure cases.
+
+b.  Fixed a bug that caused creation of the exported environment to clobber
+    the current command string if there were any exported shell functions.
+
+c.  Some changes were made to reduce bash's memory usage.
+
+d.  Fixed a problem with programmable completion and filenames to be
+    completed containing quote characters.
+
+e.  Changed the code the removes named pipes created for the <(...) and >(...)
+    expansions to defer removal until after any current shell function has
+    finished executing.
+
+f.  Fixed a bug in `select' which caused it to not handle the `continue'
+    builtin correctly.
+
+g.  Autoconf tests added for cygwin32 and mingw32.
+
+2.  New Features in Bash
+
+a.  The `--with-bash-malloc' configure option replaces `--with-gnu-malloc'
+    (which is still there for backwards compatibility).
+
+------------------------------------------------------------------------------
+This document details the changes between this version, bash-2.04-beta1,
+and the previous version, bash-2.04-alpha1.
+
+1.  Changes to Bash
+
+a.  Fixed a bug in the programmable completion code that occurred when
+    trying to complete command lines containing a `;' or `@'.
+
+b.  The file descriptor from which the shell is reading a script is now
+    moved to a file descriptor above the user-addressible range.
+
+c.  Changes to `printf' so that it can handle integers beginning with 0
+    or 0x as octal and hex, respectively.
+
+d.  Fixes to the programmable completion code so it handles nonsense like
+    `compgen -C xyz' gracefully.
+
+e.  The shell no longer modifies the signal handler for SIGPROF, allowing
+    profiling again on certain systems.
+
+f.  The shell checks for a new window size, if the user has requested it,
+    after a process exits due to a signal.
+
+g.  Fixed a bug with variables with null values in a program's temporary
+    environment and the bash getenv() replacement.
+
+h.  `declare' and the other builtins that take variable assignments as
+    arguments now honor `set -a' and mark modified variables for export.
+
+i.  Some changes were made for --dump-po-strings mode when writing strings
+    with embedded newlines.
+
+j.  The code that caches export strings from the initial environment now
+    duplicates the string rather than just pointing into the environment.
+
+k.  The filename completion quoting code now uses single quotes by default
+    if the filename being completed contains newlines, since \<newline>
+    has a special meaning to the parser.
+
+l.  Bash now uses typedefs bits32_t and u_bits32_t instead of int32_t and
+    u_int32_t, respectively to avoid conflicts on certain Unix versions.
+
+m.  Configuration changes were made for: Rhapsody, Mac OS, FreeBSD-3.x.
+
+n.  Fixed a problem with hostname-to-ip-address translation in the
+    /dev/(tcp|udp)/hostname/port redirection code.
+
+o.  The texinfo manual has been reorganized slightly.
+
+p.  Filename generation (globbing) range comparisons in bracket expressions
+    no longer use strcoll(3) even if it is available, since it has unwanted
+    effects in certain locales.
+
+q.  Fixed a cosmetic problem in the source that caused the shell to not
+    compile if DPAREN_ARITHMETIC was not defined but ARITH_FOR_COMMAND was.
+
+r.  Fixed a bug in the here-document code tripped when the file descriptor
+    opened to the file containing the text of the here document was the
+    same as a redirector specified by the user.
+
+s.  Fixed a bug where the INVERT_RETURN flag was not being set for `pipeline'
+    in `time ! pipeline'.
+
+t.  Fixed a bug with the `wait' builtin which manifested itself when an
+    interrupt was received while the shell was waiting for asynchronous
+    processes in a shell script.
+
+u.  Fixed the DEBUG trap code so that it has the correct value of $?.
+
+v.  Fixed a bug in the parameter pattern substitution code that could cause
+    the shell to attempt to free unallocated memory if the pattern started
+    with `/' and an expansion error occurs.
+
+w.  Fixed a bug in the positional parameter substring code that could
+    cause the shell to loop freeing freed memory.
+
+x.  Fixed a bug in the positional parameter pattern substitution code so
+    that it correctly handles null replacement strings with a pattern
+    string prefixed with `%' or `#'.
+
+y.  The shell no longer attempts to import functions from the environment if
+    started with `-n'.
+
+z.  Fixed a bug that caused `return' in a command substitution executed in
+    a shell function to return from the function in a subshell and continue
+    execution.
+
+aa. `hash -p /pathname/with/slashes name' is no longer allowed when the shell
+    is restricted.
+
+bb. The wait* job control functions now behave better if called when there
+    are no unwaited-for children.
+
+cc. Command substitution no longer unconditionally disables job control in
+    the subshell started to run the command.
+
+dd. A bug was fixed that occasionally caused traps to mess up the parser
+    state.
+
+ee. `bashbug' now honors user headers in the mail message it sends.
+
+ff. A bug was fixed that caused the `:p' history modifier to not print the
+    history expansion if the `histverify' option was set.
+
+2.  Changes to Readline
+
+a.  Fixed a bug in the redisplay code for lines with more than 256 line
+    breaks.
+
+b.  A bug was fixed which caused invisible character markers to not be
+    stripped from the prompt string if the terminal was in no-echo mode.
+
+c.  Readline no longer tries to get the variables it needs for redisplay
+    from the termcap entry if the calling application has specified its
+    own redisplay function.  Readline treats the terminal as `dumb' in
+    this case.
+
+d.  Fixes to the SIGWINCH code so that a multiple-line prompt with escape
+    sequences is redrawn correctly.
+
+3.  New Features in Bash
+
+a.  `bashbug' now accepts `--help' and `--version' options.
+
+b.  There is a new `xpg_echo' option to `shopt' that controls the behavior
+    of echo with respect to backslash-escaped characters at runtime.
+
+------------------------------------------------------------------------------
+This document details the changes between this version, bash-2.04-alpha1,
+and the previous version, bash-2.04-devel.
+
+1.  Changes to Bash
+
+a.  Fixed a bug that could cause core dumps when performing substring
+    expansion.
+
+b.  Shared object configuration changes for:  Solaris, OSF/1
+
+c.  The POSIX_GLOB_LIBRARY code that uses the POSIX.2 globbing facilities
+    for pathname expansion now understands GLOBIGNORE.
+
+d.  The code that implements `eval' was changed to save the value of the
+    current prompt, so an eval in a shell function called by the programmable
+    completion code will not change the prompt to $PS2.
+
+e.  Restored the undocumented NON_INTERACTIVE_LOGIN_SHELLS #define to
+    config-top.h.  If this is defined, all login shells will read the
+    startup files, not just interactive and non-interactive started with
+    the `--login' option.
+
+f.  Fixed a bug that caused the expansion code to occasionally dump core if
+    IFS contained characters > 128.
+
+g.  Fixed a problem with the grammar so that a newline is not required
+    after the `))' in the new-style arithmetic for statement; a semicolon
+    may be used as expected.
+
+h.  Variable indirection may now reference the shell's special variables.
+
+i.  The $'...' and $"..." constructs are now added to the history correctly
+    if they contain newlines and command-oriented history is enabled.
+
+j.  It is now an error to try to assign a value to a function-local copy
+    of a readonly shell variable (declared with the `local' builtin).
+
+2.  Changes to Readline
+
+a.  The history file code now uses O_BINARY mode when reading and writing
+    the history file on cygwin32.
+
+3.  New Features in Bash
+
+a.  A new programmable completion facility, with two new builtin commands:
+    complete and compgen.
+
+b.  configure has a new option, `--enable-progcomp', to compile in the
+    programmable completion features (enabled by default).
+
+c.  `shopt' has a new option, `progcomp', to enable and disable programmable
+    completion at runtime.
+
+d.  Unsetting HOSTFILE now clears the list of hostnames used for completion.
+
+4.  New Features in Readline
+
+a.  A new variable, rl_gnu_readline_p, always 1.  The intent is that an
+    application can verify whether or not it is linked with the `real'
+    readline library or some substitute.
+
+------------------------------------------------------------------------------
+This document details the changes between this version, bash-2.04-devel,
+and the previous version, bash-2.03-release.
+
+1.  Changes to Bash
+
+a.  System-specific configuration and source changes for:  Interix, Rhapsody
+
+b.  Fixed a bug in execute_cmd.c that resulted in a compile-time error if
+    JOB_CONTROL was not defined.
+
+c.  An obscure race condition in the trap code was fixed.
+
+d.  The string resulting from $'...' is now requoted to avoid any further
+    expansion.
+
+e.  The $'...' quoting syntax now allows backslash to escape a single quote,
+    for ksh-93 compatibility.
+
+f.  The $"..." quoting syntax now escapes backslashes and double quotes in
+    the translated string when displaying them with the --dump-po-strings
+    option.
+
+g.  `echo -e' no longer converts \' to '.
+
+h.  Fixes were made to the extended globbing code to handle embedded (...)
+    patterns better.
+
+i.  Some improvements were made to the code that unsets `nodelay' mode on
+    the file descriptor from which bash is reading input.
+
+j.  Some changes were made to the replacement termcap library for better
+    operation on MS-DOS.
+
+k.  Some changes were made to the tilde expansion code to handle backslash
+    as a pathname separator on MS-DOS.
+
+l.  The source has been reorganized a little bit -- there is now an `include'
+    subdirectory, and lib/posixheaders has been removed.
+
+m.  Improvements were made to the `read' builtin so that it makes many
+    fewer read(2) system calls.
+
+n.  The expansion of $- will include `c' and `s' when those options are
+    supplied at shell invocation.
+
+o.  Several improvments were made to the completion code:  variable completion
+    now works better when there are unterminated expansions, command
+    completion understands quotes better, and completion now works in certain
+    unclosed $(... constructs.
+
+p.  The arithmetic expansion code was fixed to not need the value of a
+    variable being assigned a value (fixes the "ss=09; let ss=10" bug).
+
+q.  Some changes were made to make exported environment creation faster.
+
+r.  The html documentation will be installed into $(htmldir) if that variable
+    has a value when `make install' is run.
+
+s.  Fixed a bug that would cause the bashrc file to be sourced inappropriately
+    when bash is started by sshd.
+
+t.  The SSH_CLIENT environment variable is no longer auto-exported.
+
+u.  A bug that caused redirections with (...) subshells to be performed in
+    the wrong order was fixed.
+
+v.  A bug that occasionally caused inaapropriate expansion of assignment
+    statements in compound array assignments was fixed.
+
+w.  The code that parses the words in a compound array assignment was
+    simplified considerably and should work better now.
+
+x.  Fixes to the non-job-control code in nojobs.c to make it POSIX.2-compliant
+    when a user attempts to retrieve the status of a terminated background
+    process.
+
+y.  Fixes to the `printf' builtin so that it doesn't try to expand all
+    backslash escape sequences in the format string before parsing it for
+    % format specifiers.
+
+2.  Changes to Readline
+
+a.  The history library tries to truncate the history file only if it is a
+    regular file.
+
+b.  A bug that caused _rl_dispatch to address negative array indices on
+    systems with signed chars was fixed.
+
+c.  rl-yank-nth-arg now leaves the history position the same as when it was
+    called.
+
+d.  Changes to the completion code to handle MS-DOS drive-letter:pathname
+    filenames.
+
+e.  Completion is now case-insensitive by default on MS-DOS.
+
+f.  Fixes to the history file manipulation code for MS-DOS.
+
+g.  Readline attempts to bind the arrow keys to appropriate defaults on MS-DOS.
+
+h.  Some fixes were made to the redisplay code for better operation on MS-DOS.
+
+i.  The quoted-insert code will now insert tty special chars like ^C.
+
+j.  A bug was fixed that caused the display code to reference memory before
+    the start of the prompt string.
+
+k.  More support for __EMX__ (OS/2).
+
+l.  A bug was fixed in readline's signal handling that could cause infinite
+    recursion in signal handlers.
+
+m.  A bug was fixed that caused the point to be less than zero when rl_forward
+    was given a very large numeric argument.
+
+n.  The vi-mode code now gets characters via the application-settable value
+    of rl_getc_function rather than calling rl_getc directly.
+
+3.  New Features in Bash
+
+a.  The history builtin has a `-d offset' option to delete the history entry
+    at position `offset'.
+
+b.  The prompt expansion code has two new escape sequences: \j, the number of
+    active jobs; and \l, the basename of the shell's tty device name.
+
+c.  The `bind' builtin has a new `-x' option to bind key sequences to shell
+    commands.
+
+d.  There is a new shell option, no_empty_command_completion, which, when
+    enabled, disables command completion when TAB is typed on an empty line.
+
+e.  The `help' builtin has a `-s' option to just print a builtin's usage
+    synopsys.
+
+f.  There are several new arithmetic operators:  id++, id-- (variable
+    post-increment/decrement), ++id, --id (variabl pre-increment/decrement),
+    expr1 , expr2 (comma operator).
+
+g.  There is a new ksh-93 style arithmetic for command:
+	for ((expr1 ; expr2; expr3 )); do list; done
+
+h.  The `read' builtin has a number of new options:
+	-t timeout	only wait timeout seconds for input
+	-n nchars	only read nchars from input instead of a full line
+	-d delim	read until delim rather than newline
+	-s		don't echo input chars as they are read
+
+i.  The redirection code now handles several filenames specially:
+    /dev/fd/N, /dev/stdin, /dev/stdout, and /dev/stderr, whether or
+    not they are present in the file system.
+
+j.  The redirection code now recognizes pathnames of the form
+    /dev/tcp/host/port and /dev/udp/host/port, and tries to open a socket
+    of the appropriate type to the specified port on the specified host.
+
+k.  The ksh-93 ${!prefix*} expansion, which expands to the names of all
+    shell variables whose names start with prefix, has been implemented.
+
+l.  There is a new dynamic variable, FUNCNAME, which expands to the name of
+    a currently-executing function.  Assignments to FUNCNAME have no effect.
+
+m.  The GROUPS variable is no longer readonly; assignments to it are silently
+    discarded.  This means it can be unset.
+
+4.  New Features in Readline
+
+a.  Parentheses matching is now always compiled into readline, and enabled
+    or disabled when the value of the `blink-matching-paren' variable is
+    changed.
+
+b.  MS-DOS systems now use ~/_inputrc as the last-ditch inputrc filename.
+
+c.  MS-DOS systems now use ~/_history as the default history file.
+
+d.  history-search-{forward,backward} now leave the point at the end of the
+    line when the string to search for is empty, like
+    {reverse,forward}-search-history.
+
+e.  history-search-{forward,backward} now leave the last history line found
+    in the readline buffer if the second or subsequent search fails.
+
+f.  New function for use by applications:  rl_on_new_line_with_prompt, used
+    when an application displays the prompt itself before calling readline().
+
+g.  New variable for use by applications:  rl_already_prompted.  An application
+    that displays the prompt itself before calling readline() must set this to
+    a non-zero value.
+
+------------------------------------------------------------------------------
 This document details the changes between this version, bash-2.03-release,
 and the previous version, bash-2.03-beta2.