perl___ - cannot fork, can dynalink.
The build of the first one - perl - is rather convoluted, and
requires a build of miniperl_.
-after 5.003_05:
- PERLLIB_PREFIX was not active if it matches an element of @INC
- as a whole.
- Do not need PERL_SBRK if crtdll-revision is >= 50.
- Use -Zsmall-conv if crtdll-revision is >= 50 (in static perl!).
-:7: warning: #warning <dirent.h> requires <sys/types.h>
- We compile miniperl static. It cannot fork, thus there may be
- problems with pipes (since HAS_FORK is in
- place). Pipes are required by makemaker.
- We compile perl___.exe A.OUT and dynamic. It should be able to
- fork.
- If we can fork, we my_popen by popen unless "-|". Thus we
- write a cooky "-1" into the pid array to indicate
- this.
- Apparently we can fork, and we can load dynamic extensions
- now, though probably not simultaneously.
- *DB tests corrected for OS/2 one-user stat[2].
- /bin/sh is intercepted and replaced by SH_PATH.
- Note that having '\\' in the command line of one-arg `system'
- would trigger call via shell.
- Segfault with system {'ls'} 'blah'; corrected.
- Documentation of OS/2-different features added to main PODs.
- New buitins in Cwd::
-
- Cwd::current_drive
- Cwd::sys_chdir - leaves drive as it is.
- Cwd::change_drive
- Cwd::sys_is_absolute - has drive letter and is_rooted
- Cwd::sys_is_rooted - has leading [/\\] (maybe
- after a drive)
- Cwd::sys_is_relative - changes with current dir
- Cwd::sys_cwd - Interface to cwd from EMX.
- Cwd::sys_abspath(name, dir)
- - Really really odious
- function. Returns absolute
- name of file which would
- have 'name' if CWD were 'dir'.
- Dir defaults to the current dir.
- Cwd::extLibpath [type] - Get/set current value of extended
- Cwd::extLibpath_set - library search path.
- path [type]
- The optional last argument redirects
- to END-path if true,
- default is to search BEGIN-path.
- (Note that some of these may be moved to different
- libraries - eventually).
- Executables:
- perl - can fork, can dynalink (but not simultaneously)
- perl_ - can fork, cannot dynalink
- perl__ - same as perl___, but PM.
- perl___ - cannot fork, can dynalink.
- The build of the first one - perl - is rather convoluted, and
- requires a build of miniperl_.
after 5.003_07:
custom tmpfile and tmpname which may use $TMP, $TEMP.
_isterm is substituted instead of isatty, s?random instead of srand.
`register' disabled if -DDEBUGGING and not AOUT build: stupid SD386.
3-argument select() was stomping over memory.
+
+after 5.003_21:
+ Can start scripts by executing 'dir/script' and
+ 'script.sh'. Form without extension will call shell only if
+ the specified file exists (will not look on path) (to prohibit
+ trying to run shell commands directly). - Needed by magic.t.
+
+after 5.003_27:
+ ALTERNATE_SHEBANG="extproc " supported, thus options on this
+ line are processed (possibly twice). -S is made legal on such
+ a line. This -S -x is not needed any more.
+ perl.dll may be used from non-EMX programs (via PERL_SYS_INIT
+ - the caller should have valid variable "env" with
+ environment). Known problems: $$ does not work - is 0, waitpid
+ returns immediately, thus Perl cannot wait for completion of
+ started programs.
+
+after 5.004_01:
+ flock emulation added (disable by setting env PERL_USE_FLOCK=0),
+ thanks to Rocco Caputo;
+ RSX bug with missing waitpid circomvented;
+ -S bug with full path with \ corrected.
+
+before 5.004_02:
+ -S switch to perl enables a search with additional extensions
+ .cmd, .btm, .bat, .pl as well. This means that if you have
+ mycmd.pl or mycmd.bat on PATH,
+ perl -S mycmd
+ will work. Perl will also look in the current directory first.
+ Moreover, a bug with \; in PATH being non-separator is fixed.
+
+after 5.004_03:
+ $^E tracks calls to CRT now. (May break if Perl masks some
+ changes to errno?)
+ $0 may be edited to longer lengths (at least under OS/2).
+ OS2::REXX->loads looks in the OS/2-ish fashion too.
+
+after 5.004_04:
+ Default perl.exe was built with a shorter stack than expected.
+ Strip extensions DLLs too (unless debugging build).
+ ./os2.c being RO could stop cp.
+ When starting scripts, Perl will find them on path (using the same
+ extensions as for -S command-line switch). If it finds magic
+ `extproc ' or `#!' cookies, it will start the scripts directly.
+ May use `cmd /c more <' as a pager.
+ If a program could not be started, this might have been hidden.
+ End of pipe was closed twice when `open'ing a pipeline.
+
+after 5.004_53:
+ Minimal thread support added. One needs to manually move pthread.h
+
+after 5.004_64:
+ Make DLL names different if thread-enabled.
+ Emit more informative internal DLL descriptions.
+
+5.004_72:
+ Updated OS2::Process (v0.2) included.
+
+after 5.004_73:
+ Fixed a bug with argv not NULL-terminated when starting scripts.
+ Support all the forms of starting scripts.
+ Support killing a child when receiving a signal during system()
+ (in two stage, on first send the same signal, on the next
+ send SIGKILL).
+ Add the same logic for scripts as in pdksh, including
+ stripping the path from #! line if needed,
+ calling EXECSHELL or COMSPEC for magic-less scripts;
+ Now pdksh is called only if one-arg system()/friends contains
+ metachars, or if magic-line asks for sh, or there is no magic
+ line and EXECSHELL is set to sh.
+ Shell is supplied the original command line if possible.
+
+after 5.005_02:
+ Can start PM programs from non-PM sessions by plain system()
+ and friends. Can start DOS/Win programs. Can start
+ fullscreen programs from non-fullscreen sessions too.
+ In fact system(P_PM,...) was broken.
+ We mangle the name of perl*.DLL, to allow coexistence of different
+ versions of Perl executables on the system. Mangling of
+ names of extension DLL is also changed, thus running two
+ different versions of the executable with loaded
+ extensions should not lead to conflicts (since
+ extension-full-name and Perl-version mangling work in the
+ same set ot 576 possible keys, this may lead to clashes).
+ $^E was reset on the second read, and contained ".\r\n" at the end.
+
+after 5.005_53:
+ Would segfault system()ing non-existing program;
+ AOUT build was hosed;
+ warning-test for getpriority() might lock the system hard on
+ pre-fixpak22 configuration (calling getpriority() on
+ non-existing process triggers a system-wide bug).
+
+
+ PrfDB was using a bug in processing XSUBs returning U32.
+
+ Variable $OS2::emx_rev implemented (string and numberic values
+ are the same as C variables _emx_rev and _emx_vprt).
+ Variable $OS2::emx_env implemented (same as C variable _emx_env).
+ Variable $OS2::os_ver implemented (_osmajor + 0.001 * _osminor).
+
+ Improved centralized management of HAB and HMQ. To get Perl's
+ HAB, call perl_hab_GET(). (After the initial call one
+ can use Perl_hab instead.) To require Perl's HMQ,
+ call perl_hmq_GET(), to release it call perl_hmq_UNSET(),
+ to obtain it between these calls use Perl_hmq.
+ HMQ management is refcounted, and the program will morph
+ itself into/from PM if required.
+ If perl.h cannot be included, hab may be obtained by Perl_hab_GET().
+
+ New function OS2::Error(do_harderror,do_exception). Returns
+ undef if it was not called yet, otherwise bit 1 is
+ set if on previous call do_harderror was enabled, bit
+ 2 is set if if on previous call do_exception was enabled.
+ This function enables/disables error popups associated with
+ hardware errors (Disk not ready etc.) and software exceptions.
+
+ New function OS2::Errors2Drive(drive). Returns undef if it was
+ not called yet, otherwise return false if Errors were
+ not requested to be written to a hard drive, or the
+ drive letter if this was requested.
+ This function may redirect error popups associated with
+ hardware errors (Disk not ready etc.) and software exceptions
+ to the file POPUPLOG.OS2 at the root directory of the
+ specified drive. Overrides OS2::Error() specified by
+ individual programs. Given argument undef will
+ disable redirection. Has global effect, persists
+ after the application exits.
+
+ New function OS2::SysInfo(). Returns a hash with system information.
+ The keys of the hash are
+
+ MAX_PATH_LENGTH, MAX_TEXT_SESSIONS, MAX_PM_SESSIONS,
+ MAX_VDM_SESSIONS, BOOT_DRIVE, DYN_PRI_VARIATION,
+ MAX_WAIT, MIN_SLICE, MAX_SLICE, PAGE_SIZE,
+ VERSION_MAJOR, VERSION_MINOR, VERSION_REVISION,
+ MS_COUNT, TIME_LOW, TIME_HIGH, TOTPHYSMEM, TOTRESMEM,
+ TOTAVAILMEM, MAXPRMEM, MAXSHMEM, TIMER_INTERVAL,
+ MAX_COMP_LENGTH, FOREGROUND_FS_SESSION,
+ FOREGROUND_PROCESS
+
+ New function OS2::BootDrive(force). Returns a letter without colon.
+
+ New functions OS2::MorphPM(serve)/OS2::UnMorphPM(serve). Transforms
+ the current application into a PM application and back.
+ The argument true means that a real message loop is
+ going to be performed.
+ OS2::MorphPM() returns the PM message queue handle as an integer.
+
+ New function OS2::Serve_Messages(force). Fake on-demand
+ retrieval of outstanding PM messages. If force is false,
+ will not dispatch messages if a real message loop is known to
+ be present. Returns number of messages retrieved.
+ Dies with "QUITing..." if WM_QUIT message is obtained.
+
+ New function OS2::Process_Messages(force [, cnt]). Retrieval
+ of PM messages until window creation/destruction.
+ If force is false, will not dispatch messages
+ if a real message loop is known to be present.
+ Returns change in number of windows. If cnt is given,
+ it is incremented by the number of messages retrieved.
+ Dies with "QUITing..." if WM_QUIT message is obtained.
+
+after 5.005_54:
+ Opening pipes from/to processes could fail if (un)appropriate
+ combination of STDIN/STDOUT was closed.
+
+ If the only shell-metachars of a command are ' 2>&1' at the
+ end of a command, it is executed without calling the external shell.
+
+after 5.005_57:
+ Make UDP sockets return correct caller address (OS2 API bug);
+ Enable TCPIPV4 defines (works with Warp 3 IAK too?!);
+ Force Unix-domain sockets to start with "/socket", convert
+ '/' to '\' in the calls;
+ Make C<system 1, $cmd> to treat $cmd as in C<system $cmd>;
+ Autopatch Configure;
+ Find name and location of g[nu]patch.exe;
+ Autocopy perl????.dll to t/ when testing;
+
+after 5.005_62:
+ Extract a lightweight DLL access module OS2::DLL from OS2::REXX
+ which would not load REXX runtime system;
+ Allow compile with os2.h which loads os2tk.h instead of os2emx.h;
+ Put the version of EMX CRTL into -D define;
+ Use _setsyserror() to store last error of OS/2 API for $^E;
+ New macro PERL_SYS_INIT3(argvp, argcp, envp);
+ Make Dynaloader return info on the failing module after failed dl_open();
+ OS2::REXX test were done for interactive testing (were writing
+ "ok" to stderr);
+ system() and friends return -1 on failure (was 0xFF00);
+ Put the full name of executable into $^X
+ (alas, uppercased - but with /);
+ t/io/fs.t was failing on HPFS386;
+ Remove extra ';' from defines for MQ operations.
+
+pre 5.6.1:
+ Resolved: "Bad free()" messages (e.g., from DB_File) with -Zomf build.
+ The reason was: when an extension DLL was linked, the order of
+ libraries was similar to this:
+ f1.obj f2.obj libperl.lib -llibr1 -llibr2
+ (with C RTL implicitly after this). When libperl.lib overrides
+ some C RTL functions, they are correctly resolved when mentioned
+ in f1.obj and f2.obj. However, the resolution for libr1.lib and
+ libr2.lib is implementation-dependent.
+
+ With -Zomf linking the symbols are resolved for libr1.lib and
+ libr2.lib *only if* they reside in .obj-file-sections of libperl.lib
+ which were already "picked up" for symbols in f1.obj f2.obj.
+ However, libperl.lib is an import library for a .DLL, so *each
+ symbol in libperl.lib sits in its own pseudo-section*!
+
+ Corollary: only those symbol from libperl.lib which were already
+ mentioned in f1.obj f2.obj would be used for libr1.lib and
+ libr2.lib. Example: if f1.obj f2.obj do not mention calloc() but
+ libr1.lib and libr2.lib do, then .lib's will get calloc() of C RTL,
+ not one of libperl.lib.
+
+ Solution: create a small duplicate of libperl.lib with overriding
+ symbols only. Put it *after* -llibr1 -llibr2 on the link line.
+ Map strdup() and putenv() to Perl_strdup() and Perl_putenv()
+ inside this library.
+
+ Resolved: rmdir() and mkdir() do not accept trailing slashes.
+ Wrappers are implemented.
+ Resolved: when loading modules, FP mask may be erroneously changed by
+ _DLLInitTerm() (e.g., TCP32IP).
+ Solutions: a) dlopen() saves/restores the FP mask.
+ b) When starting, reset FP mask to a sane value
+ (if the DLL was compile-time linked).
+ New functions in package OS2:
+ unsigned _control87(unsigned new,unsigned mask) # as in EMX
+ unsigned get_control87()
+ # with default values good for handling exception mask:
+ unsigned set_control87_em(new=MCW_EM,mask=MCW_EM)
+ Needed to guard against other situations when the FP mask is
+ stompted upon. Apparently, IBM used a compiler (for some period
+ of time around '95?) which changes FP mask right and left...
+ Resolved: $^X was always uppercased (cosmetic). Solution:
+ use argv[0] if it differs from what the OS returns only in case.
+ Resolved: when creating PM message queues, WinCancelShutdown() was
+ not called even if the application said that it would not serve
+ messages in this queue. Could result in PM refusing to shutdown.
+
+ Solution: resolve WinCancelShutdown at run time, keep the refcount
+ of who is going to serve the queue.
+ Resolved: Perl_Deregister_MQ() segfaulted (pid/tid not initialized).
+ Resolved: FillWinError() would not fetch the error.
+ Solution: resolve WinGetLastError at run time, call it.
+ Resolved: OS2::REXX would ignore arguments given to a Perl function
+ imported into the REXX compartment via REXX_eval_with().
+ Resolved: OS2::REXX would treat arguments given to a Perl function
+ imported into the REXX compartment via _register() as ASCIIZ
+ strings inside of binary strings.
+ Resolved: OS2::REXX did not document _register().
+ Resolved: OS2::REXX would not report the error to REXX if an error
+ condition appeared during a call to Perl function from REXX
+ compartment. As a result, the return string was not initialized.
+ A complete example of a mini-application added to OS2::REXX.
+ README.os2 updated to reflect the current state of Perl.
+
+pre 5.7.2:
+ aout build: kid bootstrap_* were not associated with XS.
+ bldlevel did not contain enough info.
+ extLibpath* was failing on the call of the second type.
+ Configure defines flushNULL now (EMX -Zomf bug broke autodetection).
+ Configure did not find SIGBREAK.
+ extLibpath supports LIBSTRICT, better error detection.
+ crypt() used if present in -lcrypt or -lufc.
+ dumb getpw*(), getgr*() etc. supported; as in EMX, but if no
+ $ENV{PW_PASSWD}, the passwd field contains a string which
+ cannot be returned by crypt() (for security reasons).
+ The unwound recursion in detecting executable by script was
+ using static buffers. Thus system('pod2text') would fail if the
+ current directory contained an empty file named 'perl'.
+ Put ordinals in the base DLL.
+ Enable EXE-compression.
+ Load time (ms): Without /e:2: 70.6; With /e:2: 75.3; Lxlite: 62.8
+ Size drops from 750K to 627K, with lxlite to 515K.
+ lxlite /c:max gives 488K, but dumps core in t/TEST
+ os2ish.h defines SYSLOG constants ==> Sys::Syslog works.
+ Corrected warnings related to OS/2 code.
+ At one place = was put instead of ==.
+ Setting $^E should work.
+ Force "SYS0dddd=0xbar: " to error messages and to dlerror().
+ ($^E == 2 printed SYS0002 itself, but 110 did not.)
+ $OS2::nsyserror=0 switches off forcing SYSdddd on $^E.
+ perl_.exe does not require PM dlls any more (symbols resolved at
+ runtime on the as needed basis).
+ OS2::Process:
+ get/set: term size; codepages; screen's cursor; screen's contents
+ reliable session name setting;
+ process's parent pid, and the session id;
+ switching to and enumeration of sessions
+ window hierarchy inspection
+ post a message to a window
+ More robust getpriority() on older Warps.
+
+ New C APIs for runtime loading of entry points from DLLs
+ (useful for entry points not present on older versions of
+ OS/2, or with DLLs not present on floppy-boot stripped down
+ setups): CallORD(), DeclFuncByORD(), DeclVoidFuncByORD(),
+ DeclOSFuncByORD(), DeclWinFuncByORD(), AssignFuncPByORD().
+
+pre 5.7.3:
+ Testing with PERL_TEST_NOVREXX=1 in environment makes tests
+ noninteractive (VREXX test requires pressing a button on a dialog).
+
+ New (ugly and voodooish) hack to work around a bug in EMX
+ runtime architecture:
+
+ EMX.DLL is *not* initialized from its _DLL_InitTerm()
+ routine, but the initialization is postponed until
+ immediately before main() is called by the principal
+ executable (may be the initialization also happens during
+ InitTerm of -Zso -Zsys DLLs?). The only reason I can see is
+ to postpone the initialization until the "layout" structure
+ is available, so the type of the executable is known.
+ [Instead, one should have broken the initialization into two
+ steps, with no-layout-known initialization ASAP, and the
+ finishing touch done when "layout" is known.]
+
+ It is due to this hack that -Zsys, -Zso etc. are needed so
+ often.
+
+ If during initialization of the Perl runtime environment we
+ discover that EMX environment is not set up completely, this
+ can be because of either our DLL being called from an
+ uncompatible flavor of EMX executable, or from an
+ unrelated-to-EMX.DLL (e.g., -Zsys or compiled with a
+ different compiler) executable. In the first case only the
+ CRTL is not completely initialized, in the other case
+ EMX.DLL may be not initialized too.
+
+ We detect which of these two situations takes place, then
+ explicitly call the initialization entry points of EMX.DLL
+ and of CRT. The large caveat is that the init-entry point
+ of EMX.DLL also moves the stack pointer (another defect of
+ EMX architecture, the init() and
+ set_exception_handlers_on_stack() entry points should have
+ been separated). Thus we need some inline-assembler to
+ compensate for this, and need to remove the installed
+ exception handler - it is useless anyway, since exception
+ handlers need to be on the stack. [This one is on the
+ stack, but will be overwritten on exit from the function.]
+
+ We also install an extra hack to run our atexit() handlers
+ on termination of the process (since the principal
+ executable does not know about *this* CRTL, we need to do it
+ ourselves - and longjmp() out of the chain of exception
+ handlers at a proper moment :-().
+
+ The net result: Perl DLL can be now used with an arbitrary
+ application. PERLREXX DLL is provided which makes Perl usable
+ from any REXX-enabled application.
+
+ New test targets added to test how well Perl DLL runs with
+ different flavors of executables (see all_harness etc). To
+ avoid waiting for the user button press, run with env
+ PERL_TEST_NOVREXX=1.
+
+ Another hack: on init of Perl runtime environment, the
+ executable is tested for being an aout EMX executable. The
+ test is the same done by gdb, so although this test is very
+ voodoo, it should be pretty robust (the beginning of the
+ executable code - at 0x10000 - is tested for a known bit
+ pattern). The result is used to set $OS2::can_fork, which is
+ eventually used to set $Config::Config{can_fork}.
+
+ REXX::eval_REXX() made reenterable. ADDRESS PERLEVAL
+ available for the run REXX code. PERLLASTERROR available.
+
+ A .map file is created for the .dll. Now easier to debug the
+ failures which do not happen with a debugging executable.
+
+ Duplicate libperl.lib as perl.lib etc. to make Embed happier.
+
+ File::Spec better adjusted to OS/2 (still does not support aa:/dir/).
+
+ New module OS::Process::Const with necessary constants for the
+ Perl calls which mimic OS/2 API calls.
+
+After @14577:
+ $Config{pager} better (but needs work in the binary installer!).
+
+ New API: OS2::DLLname([type], [\&sub])
+
+ New OS2::Process APIs:
+
+ process_hwnd winTitle_set winTitle swTitle_set bothTitle_set
+ hWindowPos hWindowPos_set DesktopWindow
+ ActiveWindow_set
+ EnableWindow EnableWindowUpdate IsWindowEnabled
+ IsWindowVisible IsWindowShowing WindowPtr WindowULong
+ WindowUShort SetWindowBits SetWindowPtr
+ SetWindowULong
+ SetWindowUShort MPFROMSHORT MPVOID MPFROMCHAR
+ MPFROM2SHORT
+ MPFROMSH2CH MPFROMLONG
+
+ OS::Process::Const symbols exportable from OS::Process too.
+
+ OS::Process: prototypes on subroutines which do not naturally
+ take "vectors" as arguments (not backwards compatible!).
+
+ New C API: SaveCroakWinError(), WinError_2_Perl_rc,
+ DeclWinFuncByORD_CACHE(), DeclWinFuncByORD_CACHE_survive(),
+ DeclWinFuncByORD_CACHE_resetError_survive(),
+ DeclWinFunc_CACHE(), DeclWinFunc_CACHE_resetError(),
+ DeclWinFunc_CACHE_survive(),
+ DeclWinFunc_CACHE_resetError_survive(); many new OS2 entry
+ points conveniently available via wrappers which will do the
+ necessary run-time dynalinking.
+
+After @15047:
+
+ makes PerlIO preserve the binary/text mode of filehandles
+ chosen by CRT library. (However, TTY handles still are not
+ clean, since switching them to TERMIO mode and back changes
+ the NL translation law at runtime, and PerlIO level does not
+ know this.)
projects / p5sagit/p5-mst-13.2.git / blobdiff