=over 8
-=item -X FILEHANDLE
-
-=item -X EXPR
-
=item -X
C<-r>, C<-w>, and C<-x> have a limited meaning only; directories
C<-x> (or C<-X>) determine if a file has an executable file type.
(S<RISC OS>)
-=item atan2 Y,X
+=item atan2
Due to issues with various CPUs, math libraries, compilers, and standards,
results for C<atan2()> may vary depending on any combination of the above.
The current version of the standards for C<atan2()> is available at
L<http://www.opengroup.org/onlinepubs/009695399/functions/atan2.html>.
-=item binmode FILEHANDLE
+=item binmode
Meaningless. (S<Mac OS>, S<RISC OS>)
The value returned by C<tell> may be affected after the call, and
the filehandle may be flushed. (Win32)
-=item chmod LIST
+=item chmod
Only limited meaning. Disabling/enabling write permission is mapped to
locking/unlocking the file. (S<Mac OS>)
The actual permissions set depend on the value of the C<CYGWIN>
in the SYSTEM environment settings. (Cygwin)
-=item chown LIST
+=item chown
Not implemented. (S<Mac OS>, Win32, S<Plan 9>, S<RISC OS>)
A little funky, because VOS's notion of ownership is a little funky (VOS).
-=item chroot FILENAME
-
=item chroot
Not implemented. (S<Mac OS>, Win32, VMS, S<Plan 9>, S<RISC OS>, VOS, VM/ESA)
-=item crypt PLAINTEXT,SALT
+=item crypt
May not be available if library or source was not provided when building
perl. (Win32)
-=item dbmclose HASH
+=item dbmclose
Not implemented. (VMS, S<Plan 9>, VOS)
-=item dbmopen HASH,DBNAME,MODE
+=item dbmopen
Not implemented. (VMS, S<Plan 9>, VOS)
-=item dump LABEL
+=item dump
Not useful. (S<Mac OS>, S<RISC OS>)
Invokes VMS debugger. (VMS)
-=item exec LIST
+=item exec
Not implemented. (S<Mac OS>)
Does not automatically flush output handles on some platforms.
(SunOS, Solaris, HP-UX)
-=item exit EXPR
-
=item exit
Emulates UNIX exit() (which considers C<exit 1> to indicate an error) by
(C<1>); this mapping cannot be overridden. Any other argument to exit()
is used directly as Perl's exit status. (VMS)
-=item fcntl FILEHANDLE,FUNCTION,SCALAR
+=item fcntl
Not implemented. (Win32, VMS)
-=item flock FILEHANDLE,OPERATION
+=item flock
Not implemented (S<Mac OS>, VMS, S<RISC OS>, VOS).
Not implemented. (S<Mac OS>, S<RISC OS>)
-=item getpgrp PID
+=item getpgrp
Not implemented. (S<Mac OS>, Win32, VMS, S<RISC OS>)
Not implemented. (S<Mac OS>, Win32, S<RISC OS>)
-=item getpriority WHICH,WHO
+=item getpriority
Not implemented. (S<Mac OS>, Win32, VMS, S<RISC OS>, VOS, VM/ESA)
-=item getpwnam NAME
+=item getpwnam
Not implemented. (S<Mac OS>, Win32)
Not useful. (S<RISC OS>)
-=item getgrnam NAME
+=item getgrnam
Not implemented. (S<Mac OS>, Win32, VMS, S<RISC OS>)
-=item getnetbyname NAME
+=item getnetbyname
Not implemented. (S<Mac OS>, Win32, S<Plan 9>)
-=item getpwuid UID
+=item getpwuid
Not implemented. (S<Mac OS>, Win32)
Not useful. (S<RISC OS>)
-=item getgrgid GID
+=item getgrgid
Not implemented. (S<Mac OS>, Win32, VMS, S<RISC OS>)
-=item getnetbyaddr ADDR,ADDRTYPE
+=item getnetbyaddr
Not implemented. (S<Mac OS>, Win32, S<Plan 9>)
-=item getprotobynumber NUMBER
+=item getprotobynumber
Not implemented. (S<Mac OS>)
-=item getservbyport PORT,PROTO
+=item getservbyport
Not implemented. (S<Mac OS>)
Not implemented. (Win32, S<Plan 9>)
-=item sethostent STAYOPEN
+=item sethostent
Not implemented. (S<Mac OS>, Win32, S<Plan 9>, S<RISC OS>)
-=item setnetent STAYOPEN
+=item setnetent
Not implemented. (S<Mac OS>, Win32, S<Plan 9>, S<RISC OS>)
-=item setprotoent STAYOPEN
+=item setprotoent
Not implemented. (S<Mac OS>, Win32, S<Plan 9>, S<RISC OS>)
-=item setservent STAYOPEN
+=item setservent
Not implemented. (S<Plan 9>, Win32, S<RISC OS>)
Not implemented. (S<Plan 9>)
-=item glob EXPR
-
=item glob
This operator is implemented via the File::Glob extension on most
Available only for socket handles. (S<RISC OS>)
-=item kill SIGNAL, LIST
+=item kill
C<kill(0, LIST)> is implemented for the sake of taint checking;
use with other signals is unimplemented. (S<Mac OS>)
$sig is 0 and the specified process exists, it returns true without
actually terminating it. (Win32)
-=item link OLDFILE,NEWFILE
+=item link
Not implemented. (S<Mac OS>, MPE/iX, VMS, S<RISC OS>)
Hard links are implemented on Win32 (Windows NT and Windows 2000)
under NTFS only.
-=item lstat FILEHANDLE
-
-=item lstat EXPR
-
=item lstat
Not implemented. (VMS, S<RISC OS>)
Return values (especially for device and inode) may be bogus. (Win32)
-=item msgctl ID,CMD,ARG
+=item msgctl
-=item msgget KEY,FLAGS
+=item msgget
-=item msgsnd ID,MSG,FLAGS
+=item msgsnd
-=item msgrcv ID,VAR,SIZE,TYPE,FLAGS
+=item msgrcv
Not implemented. (S<Mac OS>, Win32, VMS, S<Plan 9>, S<RISC OS>, VOS)
-=item open FILEHANDLE,EXPR
-
-=item open FILEHANDLE
+=item open
The C<|> variants are supported only if ToolServer is installed.
(S<Mac OS>)
Opening a process does not automatically flush output handles on some
platforms. (SunOS, Solaris, HP-UX)
-=item pipe READHANDLE,WRITEHANDLE
+=item pipe
Very limited functionality. (MiNT)
-=item readlink EXPR
-
=item readlink
Not implemented. (Win32, VMS, S<RISC OS>)
-=item rename OLDNAME,NEWNAME
+=item rename
Can't move directories between directories on different logical volumes. (Win32)
-=item select RBITS,WBITS,EBITS,TIMEOUT
+=item select
Only implemented on sockets. (Win32, VMS)
Note that the C<select FILEHANDLE> form is generally portable.
-=item semctl ID,SEMNUM,CMD,ARG
+=item semctl
-=item semget KEY,NSEMS,FLAGS
+=item semget
-=item semop KEY,OPSTRING
+=item semop
Not implemented. (S<Mac OS>, Win32, VMS, S<RISC OS>, VOS)
Not implemented. (S<Mac OS>, MPE/iX, VMS, Win32, S<RISC OS>, VOS)
-=item setpgrp PID,PGRP
+=item setpgrp
Not implemented. (S<Mac OS>, Win32, VMS, S<RISC OS>, VOS)
-=item setpriority WHICH,WHO,PRIORITY
+=item setpriority
Not implemented. (S<Mac OS>, Win32, VMS, S<RISC OS>, VOS)
Not implemented. (S<Mac OS>, MPE/iX, Win32, S<RISC OS>, VOS)
-=item setsockopt SOCKET,LEVEL,OPTNAME,OPTVAL
+=item setsockopt
Not implemented. (S<Plan 9>)
-=item shmctl ID,CMD,ARG
+=item shmctl
-=item shmget KEY,SIZE,FLAGS
+=item shmget
-=item shmread ID,VAR,POS,SIZE
+=item shmread
-=item shmwrite ID,STRING,POS,SIZE
+=item shmwrite
Not implemented. (S<Mac OS>, Win32, VMS, S<RISC OS>, VOS)
-=item sockatmark SOCKET
+=item sockatmark
A relatively recent addition to socket functions, may not
be implemented even in UNIX platforms.
-=item socketpair SOCKET1,SOCKET2,DOMAIN,TYPE,PROTOCOL
+=item socketpair
Not implemented. (Win32, VMS, S<RISC OS>, VOS, VM/ESA)
-=item stat FILEHANDLE
-
-=item stat EXPR
-
=item stat
Platforms that do not have rdev, blksize, or blocks will return these
some versions of cygwin when doing a stat("foo") and if not finding it
may then attempt to stat("foo.exe") (Cygwin)
-=item symlink OLDFILE,NEWFILE
+=item symlink
Not implemented. (Win32, VMS, S<RISC OS>)
-=item syscall LIST
+=item syscall
Not implemented. (S<Mac OS>, Win32, VMS, S<RISC OS>, VOS, VM/ESA)
-=item sysopen FILEHANDLE,FILENAME,MODE,PERMS
+=item sysopen
The traditional "0", "1", and "2" MODEs are implemented with different
numeric values on some systems. The flags exported by C<Fcntl>
(O_RDONLY, O_WRONLY, O_RDWR) should work everywhere though. (S<Mac
OS>, OS/390, VM/ESA)
-=item system LIST
+=item system
In general, do not assume the UNIX/POSIX semantics that you can shift
C<$?> right by eight to get the exit value, or that C<$? & 127>
Not useful. (S<RISC OS>)
-=item truncate FILEHANDLE,LENGTH
-
-=item truncate EXPR,LENGTH
+=item truncate
Not implemented. (Older versions of VMS)
or C<sysopen(FH,...,O_APPEND|O_RDWR)>. If a filename is supplied, it
should not be held open elsewhere. (Win32)
-=item umask EXPR
-
=item umask
Returns undef where unavailable, as of version 5.005.
C<umask> works but the correct permissions are set only when the file
is finally closed. (AmigaOS)
-=item utime LIST
+=item utime
Only the modification time is updated. (S<BeOS>, S<Mac OS>, VMS, S<RISC OS>)
=item wait
-=item waitpid PID,FLAGS
+=item waitpid
Not implemented. (S<Mac OS>)
=back
-=head1 CHANGES
-
-=over 4
-
-=item v1.49, 12 August 2002
-
-Updates for VOS from Paul Green.
-
-=item v1.48, 02 February 2001
-
-Various updates from perl5-porters over the past year, supported
-platforms update from Jarkko Hietaniemi.
-
-=item v1.47, 22 March 2000
-
-Various cleanups from Tom Christiansen, including migration of
-long platform listings from L<perl>.
-
-=item v1.46, 12 February 2000
-
-Updates for VOS and MPE/iX. (Peter Prymmer) Other small changes.
-
-=item v1.45, 20 December 1999
-
-Small changes from 5.005_63 distribution, more changes to EBCDIC info.
-
-=item v1.44, 19 July 1999
-
-A bunch of updates from Peter Prymmer for C<$^O> values,
-endianness, File::Spec, VMS, BS2000, OS/400.
-
-=item v1.43, 24 May 1999
-
-Added a lot of cleaning up from Tom Christiansen.
-
-=item v1.42, 22 May 1999
-
-Added notes about tests, sprintf/printf, and epoch offsets.
-
-=item v1.41, 19 May 1999
-
-Lots more little changes to formatting and content.
-
-Added a bunch of C<$^O> and related values
-for various platforms; fixed mail and web addresses, and added
-and changed miscellaneous notes. (Peter Prymmer)
-
-=item v1.40, 11 April 1999
-
-Miscellaneous changes.
-
-=item v1.39, 11 February 1999
-
-Changes from Jarkko and EMX URL fixes Michael Schwern. Additional
-note about newlines added.
-
-=item v1.38, 31 December 1998
-
-More changes from Jarkko.
-
-=item v1.37, 19 December 1998
-
-More minor changes. Merge two separate version 1.35 documents.
-
-=item v1.36, 9 September 1998
-
-Updated for Stratus VOS. Also known as version 1.35.
-
-=item v1.35, 13 August 1998
-
-Integrate more minor changes, plus addition of new sections under
-L<"ISSUES">: L<"Numbers endianness and Width">,
-L<"Character sets and character encoding">,
-L<"Internationalisation">.
-
-=item v1.33, 06 August 1998
-
-Integrate more minor changes.
-
-=item v1.32, 05 August 1998
-
-Integrate more minor changes.
-
-=item v1.30, 03 August 1998
-
-Major update for RISC OS, other minor changes.
-
-=item v1.23, 10 July 1998
-
-First public release with perl5.005.
-
-=back
=head1 Supported Platforms
projects / p5sagit/p5-mst-13.2.git / commitdiff