mirror of
git://git.code.sf.net/p/cdesktopenv/code
synced 2025-02-24 06:54:13 +00:00
f9fdbfc9e9
Most of these fixes are for typos and extra whitespace at the end of lines. These are the notable changes: - Fixed a compatibility issue with how asterisks are displayed using certain fonts. Bug report: https://github.com/att/ast/issues/764 - Fixed a bug in the man page that caused searches for the '|' character to fail. Bug report: https://github.com/att/ast/issues/871 - Removed a duplicate description of 'set -B' from the man page. Bug report: https://github.com/att/ast/issues/789 - Added documentation for options missing from the ksh man page (applies to 'hist -N', 'sleep -s', 'whence -q' and many of ulimit's options). Bug reports: https://github.com/att/ast/issues/948 https://github.com/att/ast/issues/503#issuecomment-386649715 https://github.com/att/ast/issues/507#issuecomment-507924608 - Applied the following ksh2020 documentation fixes: https://github.com/att/ast/pull/351 https://github.com/att/ast/pull/352 - Fixed a minor GCC -Wformat warning in procopen.c by changing a sentinel to NULL.
455 lines
22 KiB
Text
455 lines
22 KiB
Text
This is a list of changes that have been made since the 12/28/93 version
|
|
of ksh.
|
|
|
|
1. New features in 12/28/93b
|
|
a. If IFS contains two consecutive identical characters belonging
|
|
to the [:space:] class, then this character is treated as
|
|
a non-space delimiter so that each instance will delimit
|
|
a field. For example, IFS=$'\t\t' will cause two consecutive
|
|
tabs to delimit a null field.
|
|
b. The getopts command has a -a name option that specifies a
|
|
name that will be used for usage messages.
|
|
|
|
2. New features in 12/28/93e
|
|
a. The math functions, atan2, hypot, fmod, and pow were added.
|
|
b. When a shared library is loaded, if the function lib_init()
|
|
is defined in the library, it is invoked the first time that
|
|
the library is loaded with builtin -f library.
|
|
|
|
3. New features in 12/28/93f
|
|
a. Hostnames in addition to host addresses can be given in
|
|
/dev/tcp/host/port virtual file names.
|
|
b. File name completion and expansion now quotes special
|
|
characters in file names from both emacs and vi edit modes.
|
|
|
|
4. New features in 12/28/93g
|
|
a. The pipefail option has been added. With pipefail
|
|
enabled, a pipeline will not complete until all
|
|
commands are complete, and the return value will
|
|
be that of the last command to fail, or zero if
|
|
all complete successfully.
|
|
b. When an executable is found on a given path,
|
|
the appropriate library path variable is prepended
|
|
with a corresponding library directory.
|
|
5. New features in 12/28/93h
|
|
a. The PATH search algorithm has been modified to look
|
|
for a file named .fpath in each bin directory and if
|
|
found, to search for functions in this directory if
|
|
it cannot find the command in that directory.
|
|
b. When performing pathname expansion, the shell checks
|
|
to see whether each directory it reads is case sensitive
|
|
or not, and performs the matching accordingly.
|
|
c. The %T format for printing formatted date/time.
|
|
6. New features in 12/28/93i
|
|
a. Most of the built-in commands and ksh itself are now
|
|
self documenting. Running command --man will produce
|
|
screen output. Running command --html produces the
|
|
man page in html format.
|
|
b. The getopts builtin can process command description
|
|
strings to produce man pages.
|
|
|
|
7. Bugs fixed in 12/28/93a for default OPTIONS
|
|
a. An expansion bug which causes portions of a word after
|
|
a $((...)) expansion that contains a nested $var expansion
|
|
to be lost has been fixed.
|
|
b. A bug that caused a core dump when a script that did not
|
|
have PWD set and did a cd inside command substitution
|
|
has been fixed.
|
|
c. A bug which caused a core dump on some machines when
|
|
the LANG variable was assigned to has been fixed.
|
|
d. A bug which incorrectly handled set disciplines that
|
|
performed arithmetic evaluation when the discipline
|
|
was called from the arithmetic evaluator has been fixed.
|
|
e. A bug caused by an EXIT trap inside a function that
|
|
was executed in a subshell was fixed.
|
|
f. If foo is a function, and not a program, then command foo
|
|
now reports that foo isn't found rather than invoking foo.
|
|
g. The previous version incorrectly listed -A as an
|
|
invocation option. The -A option is only for set.
|
|
h. A bug was fixed which caused ksh to loop when execution trace
|
|
was enabled and the PS4 prompt required command substitution.
|
|
i. A bug which could cause the job control switch character
|
|
to be disabled when a script that enabled monitor mode
|
|
terminated was fixed.
|
|
j. A bug in the macro expansion global replacement operator //,
|
|
when the pattern began with a [ or +( has been fixed.
|
|
k. A bug which prevented ~ expansion from occurring when
|
|
it was terminated with a colon inside an assignment
|
|
has been fixed.
|
|
l. A bug in the dot command which prevented autoload functions
|
|
from working has been fixed.
|
|
m. A bug which caused a variable to be unset if the
|
|
its value were expanded inside a set discipline has
|
|
been fixed.
|
|
n. Whence -a now longer reports that a defined function
|
|
is undefined.
|
|
o. A bug on some systems in which $0 would be incorrect
|
|
in scripts invoked by name has been fixed.
|
|
p. Here documents with an empty body now work.
|
|
1. A bug which disabled argument passing and resetting
|
|
of options for a script invoked by name inside a
|
|
function has been fixed.
|
|
r. A bug in which an EXIT trap set the caller of a function
|
|
would be executed if a command called inside a function
|
|
was not found has been fixed.
|
|
s. A bug which allowed a script to trap signals that are
|
|
ignored at the time that the shell was invoked has
|
|
been fixed.
|
|
t. A bug which caused 2<&1- when applied to a shell built-in
|
|
to leave standard input closed has been fixed.
|
|
u. A bug which caused the shell to incorrectly parse
|
|
$() command substitutions with nested case statements
|
|
has been fixed.
|
|
|
|
8. Bugs fixed in 12/28/93b for default OPTIONS
|
|
a. A bug which caused unset RANDOM to dump core has been
|
|
fixed.
|
|
b. A bug which prevented return for terminating a profile
|
|
or ENV file has been fixed.
|
|
c. A bug which prevented standard input from being
|
|
directed to /dev/null for background jobs when
|
|
monitor mode was turned off has been fixed.
|
|
d. Statements of the form typeset -options var[expr]=value
|
|
did not perform substitutions on expr as expected.
|
|
e. A bug which prevented the shell from sending a HUP
|
|
signal to some background jobs that were not disowned
|
|
has been fixed.
|
|
f. A bug which allowed a script to trap signals that are
|
|
ignored at the time that the shell was invoked by exec
|
|
has been fixed.
|
|
g. A bug which could cause a core dump when a discipline
|
|
function was unset within a discipline was fixed.
|
|
h. The typeset builtin now accepts a first argument of
|
|
+ or - for compatibility with ksh88.
|
|
i. For compatibility with ksh88, the results of expansions
|
|
of command arguments will treat the extended character
|
|
match characters ()|& as ordinary characters.
|
|
j. A bug which caused read to fail on a file that was
|
|
open for read/write with <> when the first operation
|
|
was print or printf has been fixed.
|
|
k. When a job is suspended, it is put on the top of
|
|
the job list as required by the POSIX standard.
|
|
l. The value of OPTARG when an option that required
|
|
an argument but didn't have one was incorrect in the
|
|
case the the option string began with a :.
|
|
m. A bug which caused the terminal to get into a bad
|
|
state with some KEYBD traps in vi-mode has been fixed.
|
|
n. A bug which caused an invalid trap to cause a script
|
|
to terminate, rather than just return an error, has
|
|
been fixed.
|
|
o. Backreferencing sub-expressions in patterns and replacement
|
|
strings now works.
|
|
p. A bug in chmod which caused the -R option to fail has
|
|
been fixed.
|
|
|
|
9. Bugs fixed in 12/28/93c for default OPTIONS
|
|
a. The expansion of "$@" was incorrect when $1 was the null
|
|
string.
|
|
b. A bug which could incorrectly report a syntax error in
|
|
a backquoted expression when a $ was preceded by \\
|
|
has been fixed.
|
|
c. A bug which prevented the shell from exiting after
|
|
reporting an error when failing to open a script
|
|
has been fixed.
|
|
d. A bug that could lead to memory corruption when a
|
|
large here document that required parameter or command
|
|
substitution was expanded has been fixed.
|
|
e. A bug that could cause a core dump on some systems
|
|
after ksh detected an error when reading a function
|
|
has been fixed.
|
|
f. A bug which could cause a coprocess to hang when
|
|
reading from a process that has terminated has been fixed.
|
|
g. A bug which caused a script to terminate when set -e
|
|
was on and the first command of and && or || list
|
|
failed has been fixed.
|
|
h. A bug with here documents inside $(...) when the delimiter
|
|
word is an identifier has been fixed.
|
|
i. A bug which caused $0 to display the wrong value when
|
|
a script was invoked as an argument to the . command
|
|
and the eval command has been fixed.
|
|
j. A bug that could cause the built-in sleep to hang
|
|
has been fixed.
|
|
k. A bug introduces in 12/28/93b which caused the backslash
|
|
to be removed when it was followed by digit inside double
|
|
quotes in some instances has been fixed.
|
|
l. A bug which could cause a core dump if ksh was invoked with
|
|
standard input closed has been fixed.
|
|
m. A bug which could cause a core dump if typeset -A was
|
|
specified for an existing variable has been fixed.
|
|
n. Variables that were unset but had attributes such as readonly
|
|
and export were not listed with readonly, export and typeset.
|
|
o. Several problems with signals have been fixed.
|
|
p. A bug which prevented ulimit -t from working has been fixed.
|
|
Also, a bug in which failed ulimits could cause a core dump
|
|
has also been fixed.
|
|
q. A bug in expansion of the form ${name/#pattern/string} and
|
|
${name/%pattern/string} has been fixed.
|
|
r. A bug which caused read -r on a line that contained only
|
|
blanks to get a non-null value has been fixed.
|
|
s. A bug introduced in the 'a' point release in which
|
|
${x='\\'} expanded to \ when x was unset has been fixed.
|
|
t. A bug which prevented a trap on EXIT from being executed
|
|
when the last command in a script was a function invocation
|
|
has been fixed.
|
|
u. A bug which caused an interactive shell ignore input when
|
|
standard error was redirected to a file with exec,
|
|
and then restored with exec 2>&1 has been fixed.
|
|
v. An interactive shell turns on monitor mode even when
|
|
standard error has been redirected to a file.
|
|
w. A bug which could cause standard input to be incorrectly
|
|
positioned for the last command of a script has been fixed.
|
|
y. A bug in the edit modes which allowed walking back in
|
|
the history file for more than HISTSIZE commands has
|
|
been fixed.
|
|
z. A bug which could cause a core dump if variable TMPDIR was
|
|
changed between two command substitutions has been fixed.
|
|
aa. A bug which prevented a trap on EXIT from being cleared
|
|
has been fixed.
|
|
|
|
10. Bugs fixed in 12/28/93d for default OPTIONS
|
|
a. The \ character was not handled correctly in replacement
|
|
patterns with ${x/pattern/replace}.
|
|
b. A bug with read in which the line did not end with
|
|
a new-line has been fixed.
|
|
c. A bug in file name generation which sometimes
|
|
appended a . for filenames that ended in / has
|
|
been fixed.
|
|
d. If a process is waited for after a status has
|
|
been returned by a previous wait, wait now
|
|
returns 127.
|
|
e. A bug with hist (fc) -e which prevented a command
|
|
to re-executed after it had been edited has been fixed.
|
|
f. A bug which prevented quoting from removing the meaning
|
|
of unary test operators has been fixed.
|
|
|
|
11. Bugs fixed in 12/28/93e for default OPTIONS
|
|
a. Empty command substitutions of the form $() now work.
|
|
b. whence -v foo now gives the correct result after calling
|
|
builtin -d foo.
|
|
c. A bug in right to left arithmetic assignment for which
|
|
the arithmetic expression (( y = x = 1.5 )) did not
|
|
yield 1 for y when x was declared typeset -i was fixed.
|
|
d. printf has been fixed to handle format containing \0
|
|
and/or \0145 correctly. In addition, characters following
|
|
%b in the format string are no longer displayed when
|
|
the operand contains \c.
|
|
e. A bug in printf that could cause the %E format to
|
|
produce unnormalized results has been fixed.
|
|
f. A bug which causes some arithmetic expressions to be
|
|
incorrectly evaluated as integer expressions rather
|
|
that floating point has been fixed.
|
|
g. Functions defined inside a subshell no longer remain
|
|
defined when the subshell completes.
|
|
h. The error message from sh -c ';echo foo' has been
|
|
corrected.
|
|
i. The format for umask -S has been changed to agree
|
|
with the specification in the POSIX standard.
|
|
j. A bug that caused side effects in subscript evaluation
|
|
when tracing was enabled for subscripts using ++ or --
|
|
has been fixed.
|
|
k. To conform to the POSIX standard getopts has been changed
|
|
so that the option char is set to ? when it returns with
|
|
a non-zero exit status.
|
|
l. The handling of \} inside ${name...} has been fixed so
|
|
that the \ quotes the }.
|
|
m. A bug that caused the read builtin to resume execution
|
|
after processing a trap has been fixed.
|
|
n. [[ -s file ]] has been fixed so that if file is open
|
|
by ksh, it is flushed first.
|
|
o. In some cases attributes and sizes for non exported
|
|
variables weren't being reset before running a script.
|
|
p. The value of TMOUT was affected by changes make to
|
|
it in a subshell.
|
|
q. The jobs command did not reflect changes make by
|
|
sending the CONT signal to a command.
|
|
r. The error message for ksh -o unknown was incorrect.
|
|
s. Functions invoked as name=value name, did not use
|
|
values from the calling scope when evaluating value.
|
|
t. A bug in which the shell would reexecute previously
|
|
executed code when a shell script or coprocess was
|
|
run in the background has been fixed.
|
|
u. A bug in which an empty here-document would leave
|
|
a file descriptor open has been fixed.
|
|
v. A bug in which $(set -A array ...) would leave a
|
|
side effect has been fixed.
|
|
w. A discipline function for a global variable defined
|
|
within a function defined with the function keyword,
|
|
incorrectly created a local variable of the same name
|
|
and applied the discipline to it.
|
|
|
|
12. Bugs fixed in 12/28/93f for default OPTIONS
|
|
a. A bug which would cause the secondary prompt to be
|
|
displayed when a user entered a literal carriage
|
|
return has been fixed.
|
|
b. I bug which caused ksh read -s name to core dump was
|
|
fixed.
|
|
c. I bug with the expansion of \} and \] inside double
|
|
quoted strings that also contained variable expansions
|
|
has been fixed
|
|
d. Changes in the 'e' point release caused autoload
|
|
functions invoked from within command substitution
|
|
to fail. This has been fixed.
|
|
e. A bug in the processing of here-documents that could
|
|
prevent variable substitution to occur after $(...) command
|
|
substitution for long here documents has been fixed.
|
|
f. A bug caused by a race condition that could cause SIGTERM
|
|
to be ignored by a child process has been fixed.
|
|
g. A bug which prevented the startup of a coprocess immediately
|
|
after killing a running coprocess has been fixed.
|
|
h. ulimit foobar, where foobar is not an arithmetic
|
|
expression, now gives an error message as it did with ksh88
|
|
instead of setting the file size limit to 0.
|
|
i. A bug which could cause an interactive shell to terminate when
|
|
the last process of a pipeline was a POSIX function was fixed.
|
|
j. A bug which could cause command substitution of a shell script
|
|
to core dump has been fixed.
|
|
k. A security hole was fixed in suid_exec.
|
|
l. Arithmetic functions such as pow() that take more than
|
|
one argument, did not work if arguments other than the
|
|
first contained parenthesized sub-expression.
|
|
m. The error message from a script containing an incomplete
|
|
arithmetic expression has been corrected.
|
|
n. A bug which caused a core dump on some machines when
|
|
the value of a name reference contained a positional
|
|
parameter and the name reference was not defined inside
|
|
a function has been fixed.
|
|
o. Arithmetic expressions now correctly handle hexadecimal
|
|
constants.
|
|
p. A bug in which integer variables could be expanded
|
|
with a leading 10# when declared with typeset -i
|
|
multiple times has been corrected.
|
|
q. A bug in which IFS wasn't correctly restored when
|
|
set within command substitution has been fixed.
|
|
r. The _ character is now considered as part of a word
|
|
with the M-f and M-b emacs directives as it was in ksh88.
|
|
|
|
13. Bugs fixed in 12/28/93g for default OPTIONS
|
|
a. A bug in which a name reference could be created to
|
|
itself and later cause the shell to get into an infinite
|
|
loop has been fixed.
|
|
b. A bug in shcomp relating to compound variables was fixed.
|
|
c. A bug introduced in 'e' in which leading 0's in -Z
|
|
fields caused the value to be treated as octal for arithmetic
|
|
evaluation has been fixed.
|
|
d. A bug when a name reference with a shorter name than
|
|
the variable it references was the subject of a compound
|
|
assignment has been fixed.
|
|
e. A bug which in which assignment to array variables in
|
|
a subshell could effect the parent shell has been
|
|
fixed.
|
|
f. read name?prompt was putting a 0 byte at the end of the
|
|
prompt on standard error.
|
|
g. A bug in [[ string1 > string2 ]] when ksh was run with -x
|
|
has been fixed.
|
|
k. A bug in which the escape character was not processed
|
|
correctly inside {...} when brace expansion is enabled
|
|
has been fixed, for example {\$foo}.
|
|
l. A bug in line continuation in here-documents has been
|
|
fixed.
|
|
m. The default base when not specified with typeset -i is
|
|
10 in accordance with the documentation. Previously,
|
|
the value was determined by the first assignment.
|
|
n. A parsing bug in which a # preceded alphanumeric
|
|
characters inside a command substitution caused
|
|
a syntax error to be reported has been fixed.
|
|
o. A bug in which a decimal constant represented as 10#ddd
|
|
where ddd was more than five digits generated a syntax
|
|
error has been fixed.
|
|
p. A bug in here document expansion in which ${...} expansions
|
|
were split across buffer boundaries has been fixed.
|
|
|
|
14. Bugs fixed in 12/28/93h for default OPTIONS
|
|
a. I bug in shcomp for compilation of unary operators with [[...]]
|
|
has been fixed.
|
|
b. A bug in which the value of $? was changed when executing
|
|
a keyboard trap has been fixed.
|
|
c. The handling of SIGCHLD has been changed so that the
|
|
trap is not triggered while executing trap commands
|
|
to avoid recursive trap calls.
|
|
d. I bug in which a local variable in a function declared readonly
|
|
would generated an error when the function went out of
|
|
scope has been fixed.
|
|
e. I bug in which \<new_line> entered from the keyboard
|
|
with the KEYBD trap enabled has been fixed.
|
|
f. The error message for a misplaced ((, for example print ((3),
|
|
was often garbled and has been fixed.
|
|
g. I bug in the KEYBD trap in which escape sequences of the form
|
|
<ESC>[#~ were not being handled as a unit has been fixed.
|
|
h. A bug in which ksh would consider expressions like [[ (a) ]]
|
|
as syntax errors has been fixed.
|
|
i. A function defined as foo() without a function body
|
|
was not reported as a syntax error.
|
|
j. A bug in which ksh could run out of file descriptors when
|
|
a stream was repeatedly opened with exec and read from
|
|
has been fixed.
|
|
k. A bug introduced when fixing item n from the 'g' point
|
|
release has been fixed.
|
|
|
|
15. Bugs fixed in 12/28/93i for default OPTIONS
|
|
a. A bug in which a script could terminate when getopts
|
|
encountered an error when invoked inside a function
|
|
has been fixed.
|
|
b. When a symbolic link was specified as the name of
|
|
the script to invoke by name, the value of $0 was
|
|
set to the real file name rather than the link name
|
|
in some cases and this has been fixed.
|
|
|
|
16. Bug fixes for specific non-default option combinations.
|
|
a. More signal names have been added for Solaris
|
|
b. A bug fixed for the v directive in vi MULTIBYTE has been
|
|
fixed.
|
|
c. Code to for IFS handling of multibyte characters has
|
|
been added.
|
|
d. The displaying of multibyte strings in export, readonly,
|
|
typeset, and execution traces has been fixed.
|
|
e. A bug with type ahead and KEYBOARD traps with the
|
|
MULTIBYTE option set has been fixed.
|
|
f. The k-shell information abstraction database option, KIA,
|
|
has been revamped for the 'e' point release.
|
|
g. A bug in brace pattern expansions that caused expressions
|
|
such as {foo\,bar,bam} to expand incorrectly have been fixed.
|
|
h. On the U/WIN version for Window 95 and Windows NT,
|
|
when a directory beginning with a letter followed by
|
|
a colon is given to cd, it is assumed to be an absolute
|
|
directory.
|
|
i. There was a bug in the compile option that does not
|
|
use fork() in which the current option settings where
|
|
not propagated to sub-shells.
|
|
j. A bug in setting .sh.editchar during the KEYBD trap
|
|
for the MULTIBYTE option was fixed in release 'h'.
|
|
k. A bug in which the precision given as an argument
|
|
to printf was not working has been fixed.
|
|
|
|
17. Other changes to 12/28/93[abcdefghi]
|
|
a. A couple of minor changes to make adding built-ins easier.
|
|
b. Variables inside functions are now statically scoped.
|
|
The previous behavior was never documented.
|
|
c. A few changes have been made to the name-value library
|
|
that affect built-ins that use disciplines. The
|
|
changes allow disciplines to be shared by variables
|
|
and should make it possible to add new disciplines
|
|
without recompilation.
|
|
d. The name-value library interface has undergone significant
|
|
change for this revision. See the new nval.3 man page.
|
|
e. Builtin functions can take a third argument which is
|
|
a void*.
|
|
f. The nv_scan() function can restrict the scope of a walk
|
|
to the top scope. Starting in 'f', nv_scan() has an
|
|
additional pointer argument that is passed to each invoked
|
|
function.
|
|
g. Starting with release 'f', an empty for list behave like
|
|
a for list with null expansions. It produces a warning
|
|
message with sh -n.
|
|
h. Starting with release 'f' the code has been modified to
|
|
work with EBCDIC as well as ASCII.
|
|
i. Starting with the release 'g', the name-value pair library
|
|
uses the cdt library rather than the hash library.
|
|
j. The sh_fun() function now takes third argument which
|
|
is an argument list for the invoked discipline function
|
|
or built-in.
|
|
k. A callback function can be installed which will give
|
|
notification of file duplications and file closes.
|
|
|
|
18. Incompatibilities with 12/28/93 version.
|
|
None intentional.
|
|
|