perl561delta.1

视频监控网络部分的协议ddns,的模块的实现代码,请大家大胆指正.

.IP "Debugger" 4
.IX Item "Debugger"
Debugger exit code now reflects the script exit code.
.Sp
Condition \f(CW"0"\fR in breakpoints is now treated correctly.
.Sp
The \f(CW\*(C`d\*(C'\fR command now checks the line number.
.Sp
\&\f(CW$.\fR is no longer corrupted by the debugger.
.Sp
All debugger output now correctly goes to the socket if RemotePort
is set.
.IP "\s-1PERL5OPT\s0" 4
.IX Item "PERL5OPT"
\&\s-1PERL5OPT\s0 can be set to more than one switch group.  Previously,
it used to be limited to one group of options only.
.IP "\fIchop()\fR" 4
.IX Item "chop()"
chop(@list) in list context returned the characters chopped in reverse
order.  This has been reversed to be in the right order.
.IP "Unicode support" 4
.IX Item "Unicode support"
Unicode support has seen a large number of incremental improvements,
but continues to be highly experimental.  It is not expected to be
fully supported in the 5.6.x maintenance releases.
.Sp
\&\fIsubstr()\fR, \fIjoin()\fR, \fIrepeat()\fR, \fIreverse()\fR, \fIquotemeta()\fR and string
concatenation were all handling Unicode strings incorrectly in
Perl 5.6.0.  This has been corrected.
.Sp
Support for \f(CW\*(C`tr///CU\*(C'\fR and \f(CW\*(C`tr///UC\*(C'\fR etc., have been removed since
we realized the interface is broken.  For similar functionality,
see \*(L"pack\*(R" in perlfunc.
.Sp
The Unicode Character Database has been updated to version 3.0.1
with additions made available to the public as of August 30, 2000.
.Sp
The Unicode character classes \ep{Blank} and \ep{SpacePerl} have been
added.  \*(L"Blank\*(R" is like C \fIisblank()\fR, that is, it contains only
\&\*(L"horizontal whitespace\*(R" (the space character is, the newline isn't),
and the \*(L"SpacePerl\*(R" is the Unicode equivalent of \f(CW\*(C`\es\*(C'\fR (\ep{Space}
isn't, since that includes the vertical tabulator character, whereas
\&\f(CW\*(C`\es\*(C'\fR doesn't.)
.Sp
If you are experimenting with Unicode support in perl, the development
versions of Perl may have more to offer.  In particular, I/O layers
are now available in the development track, but not in the maintenance
track, primarily to do backward compatibility issues.  Unicode support
is also evolving rapidly on a daily basis in the development track\*(--the
maintenance track only reflects the most conservative of these changes.
.IP "64\-bit support" 4
.IX Item "64-bit support"
Support for 64\-bit platforms has been improved, but continues to be
experimental.  The level of support varies greatly among platforms.
.IP "Compiler" 4
.IX Item "Compiler"
The B Compiler and its various backends have had many incremental
improvements, but they continue to remain highly experimental.  Use in
production environments is discouraged.
.Sp
The perlcc tool has been rewritten so that the user interface is much
more like that of a C compiler.
.Sp
The perlbc tools has been removed.  Use \f(CW\*(C`perlcc \-B\*(C'\fR instead.
.IP "Lvalue subroutines" 4
.IX Item "Lvalue subroutines"
There have been various bugfixes to support lvalue subroutines better.
However, the feature still remains experimental.
.IP "IO::Socket" 4
.IX Item "IO::Socket"
IO::Socket::INET failed to open the specified port if the service
name was not known.  It now correctly uses the supplied port number
as is.
.IP "File::Find" 4
.IX Item "File::Find"
File::Find now \fIchdir()\fRs correctly when chasing symbolic links.
.IP "xsubpp" 4
.IX Item "xsubpp"
xsubpp now tolerates embedded \s-1POD\s0 sections.
.ie n .IP """no Module;""" 4
.el .IP "\f(CWno Module;\fR" 4
.IX Item "no Module;"
\&\f(CW\*(C`no Module;\*(C'\fR does not produce an error even if Module does not have an
\&\fIunimport()\fR method.  This parallels the behavior of \f(CW\*(C`use\*(C'\fR vis-a-vis
\&\f(CW\*(C`import\*(C'\fR.
.IP "Tests" 4
.IX Item "Tests"
A large number of tests have been added.
.Sh "Core features"
.IX Subsection "Core features"
\&\fIuntie()\fR will now call an \s-1\fIUNTIE\s0()\fR hook if it exists.  See perltie
for details.
.PP
The \f(CW\*(C`\-DT\*(C'\fR command line switch outputs copious tokenizing information.
See perlrun.
.PP
Arrays are now always interpolated in double-quotish strings.  Previously,
\&\f(CW"[e-mail]"\fR used to be a fatal error at compile time, if an array
\&\f(CW@bar\fR was not used or declared.  This transitional behavior was
intended to help migrate perl4 code, and is deemed to be no longer useful.
See \*(L"Arrays now always interpolate into double-quoted strings\*(R".
.PP
\&\fIkeys()\fR, \fIeach()\fR, \fIpop()\fR, \fIpush()\fR, \fIshift()\fR, \fIsplice()\fR and \fIunshift()\fR
can all be overridden now.
.PP
\&\f(CW\*(C`my _\|_PACKAGE_\|_ $obj\*(C'\fR now does the expected thing.
.Sh "Configuration issues"
.IX Subsection "Configuration issues"
On some systems (\s-1IRIX\s0 and Solaris among them) the system malloc is demonstrably
better.  While the defaults haven't been changed in order to retain binary
compatibility with earlier releases, you may be better off building perl
with \f(CW\*(C`Configure \-Uusemymalloc ...\*(C'\fR as discussed in the \fI\s-1INSTALL\s0\fR file.
.PP
\&\f(CW\*(C`Configure\*(C'\fR has been enhanced in various ways:
.IP "\(bu" 4
Minimizes use of temporary files.
.IP "\(bu" 4
By default, does not link perl with libraries not used by it, such as
the various dbm libraries.  SunOS 4.x hints preserve behavior on that
platform.
.IP "\(bu" 4
Support for pdp11\-style memory models has been removed due to obsolescence.
.IP "\(bu" 4
Building outside the source tree is supported on systems that have
symbolic links. This is done by running
.Sp
.Vb 2
\&    sh /path/to/source/Configure \-Dmksymlinks ...
\&    make all test install
.Ve
.Sp
in a directory other than the perl source directory.  See \fI\s-1INSTALL\s0\fR.
.IP "\(bu" 4
\&\f(CW\*(C`Configure \-S\*(C'\fR can be run non-interactively.
.Sh "Documentation"
.IX Subsection "Documentation"
\&\s-1README\s0.aix, \s-1README\s0.solaris and \s-1README\s0.macos have been added.
\&\s-1README\s0.posix\-bc has been renamed to \s-1README\s0.bs2000.  These are
installed as perlaix, perlsolaris, perlmacos, and
perlbs2000 respectively.
.PP
The following pod documents are brand new:
.PP
.Vb 7
\&    perlclib    Internal replacements for standard C library functions
\&    perldebtut  Perl debugging tutorial
\&    perlebcdic  Considerations for running Perl on EBCDIC platforms
\&    perlnewmod  Perl modules: preparing a new module for distribution
\&    perlrequick Perl regular expressions quick start
\&    perlretut   Perl regular expressions tutorial
\&    perlutil    utilities packaged with the Perl distribution
.Ve
.PP
The \fI\s-1INSTALL\s0\fR file has been expanded to cover various issues, such as
64\-bit support.
.PP
A longer list of contributors has been added to the source distribution.
See the file \f(CW\*(C`AUTHORS\*(C'\fR.
.PP
Numerous other changes have been made to the included documentation and FAQs.
.Sh "Bundled modules"
.IX Subsection "Bundled modules"
The following modules have been added.
.IP "B::Concise" 4
.IX Item "B::Concise"
Walks Perl syntax tree, printing concise info about ops.  See B::Concise.
.IP "File::Temp" 4
.IX Item "File::Temp"
Returns name and handle of a temporary file safely.  See File::Temp.
.IP "Pod::LaTeX" 4
.IX Item "Pod::LaTeX"
Converts Pod data to formatted LaTeX.  See Pod::LaTeX.
.IP "Pod::Text::Overstrike" 4
.IX Item "Pod::Text::Overstrike"
Converts \s-1POD\s0 data to formatted overstrike text.  See Pod::Text::Overstrike.
.PP
The following modules have been upgraded.
.IP "\s-1CGI\s0" 4
.IX Item "CGI"
\&\s-1CGI\s0 v2.752 is now included.
.IP "\s-1CPAN\s0" 4
.IX Item "CPAN"
\&\s-1CPAN\s0 v1.59_54 is now included.
.IP "Class::Struct" 4
.IX Item "Class::Struct"
Various bugfixes have been added.
.IP "DB_File" 4
.IX Item "DB_File"
DB_File v1.75 supports newer Berkeley \s-1DB\s0 versions, among other
improvements.
.IP "Devel::Peek" 4
.IX Item "Devel::Peek"
Devel::Peek has been enhanced to support dumping of memory statistics,
when perl is built with the included \fImalloc()\fR.
.IP "File::Find" 4
.IX Item "File::Find"
File::Find now supports pre and post-processing of the files in order
to \fIsort()\fR them, etc.
.IP "Getopt::Long" 4
.IX Item "Getopt::Long"
Getopt::Long v2.25 is included.
.IP "IO::Poll" 4
.IX Item "IO::Poll"
Various bug fixes have been included.
.IP "IPC::Open3" 4
.IX Item "IPC::Open3"
IPC::Open3 allows use of numeric file descriptors.
.IP "Math::BigFloat" 4
.IX Item "Math::BigFloat"
The \fIfmod()\fR function supports modulus operations.  Various bug fixes
have also been included.
.IP "Math::Complex" 4
.IX Item "Math::Complex"
Math::Complex handles inf, NaN etc., better.
.IP "Net::Ping" 4
.IX Item "Net::Ping"
\&\fIping()\fR could fail on odd number of data bytes, and when the echo service
isn't running.  This has been corrected.
.IP "Opcode" 4
.IX Item "Opcode"
A memory leak has been fixed.
.IP "Pod::Parser" 4
.IX Item "Pod::Parser"
Version 1.13 of the Pod::Parser suite is included.
.IP "Pod::Text" 4
.IX Item "Pod::Text"
Pod::Text and related modules have been upgraded to the versions
in podlators suite v2.08.
.IP "SDBM_File" 4
.IX Item "SDBM_File"
On dosish platforms, some keys went missing because of lack of support for
files with \*(L"holes\*(R".  A workaround for the problem has been added.
.IP "Sys::Syslog" 4
.IX Item "Sys::Syslog"
Various bug fixes have been included.
.IP "Tie::RefHash" 4
.IX Item "Tie::RefHash"
Now supports Tie::RefHash::Nestable to automagically tie hashref values.
.IP "Tie::SubstrHash" 4
.IX Item "Tie::SubstrHash"
Various bug fixes have been included.
.Sh "Platform-specific improvements"
.IX Subsection "Platform-specific improvements"
The following new ports are now available.
.IP "\s-1NCR\s0 MP-RAS" 4
.IX Item "NCR MP-RAS"
.PD 0
.IP "NonStop-UX" 4
.IX Item "NonStop-UX"
.PD
.PP
Perl now builds under Amdahl \s-1UTS\s0.
.PP
Perl has also been verified to build under Amiga \s-1OS\s0.
.PP
Support for \s-1EPOC\s0 has been much improved.  See \s-1README\s0.epoc.
.PP
Building perl with \-Duseithreads or \-Duse5005threads now works
under HP-UX 10.20 (previously it only worked under 10.30 or later).
You will need a thread library package installed.  See \s-1README\s0.hpux.
.PP
Long doubles should now work under Linux.
.PP
Mac \s-1OS\s0 Classic is now supported in the mainstream source package.
See \s-1README\s0.macos.
.PP
Support for MPE/iX has been updated.  See \s-1README\s0.mpeix.
.PP
Support for \s-1OS/2\s0 has been improved.  See \f(CW\*(C`os2/Changes\*(C'\fR and \s-1README\s0.os2.
.PP
Dynamic loading on z/OS (formerly \s-1OS/390\s0) has been improved.  See
\&\s-1README\s0.os390.
.PP
Support for \s-1VMS\s0 has seen many incremental improvements, including
better support for operators like backticks and \fIsystem()\fR, and better
\&\f(CW%ENV\fR handling.  See \f(CW\*(C`README.vms\*(C'\fR and perlvms.
.PP
Support for Stratus \s-1VOS\s0 has been improved.  See \f(CW\*(C`vos/Changes\*(C'\fR and \s-1README\s0.vos.
.PP
Support for Windows has been improved.
.IP "\(bu" 4
\&\fIfork()\fR emulation has been improved in various ways, but still continues
to be experimental.  See perlfork for known bugs and caveats.
.IP "\(bu" 4
\&\f(CW%SIG\fR has been enabled under \s-1USE_ITHREADS\s0, but its use is completely
unsupported under all configurations.
.IP "\(bu" 4
Borland \*(C+ v5.5 is now a supported compiler that can build Perl.
However, the generated binaries continue to be incompatible with those
generated by the other supported compilers (\s-1GCC\s0 and Visual \*(C+).
.IP "\(bu" 4
Non-blocking waits for child processes (or pseudo-processes) are
supported via \f(CW\*(C`waitpid($pid, &POSIX::WNOHANG)\*(C'\fR.
.IP "\(bu" 4
A memory leak in \fIaccept()\fR has been fixed.
.IP "\(bu" 4
\&\fIwait()\fR, \fIwaitpid()\fR and backticks now return the correct exit status under
Windows 9x.
.IP "\(bu" 4