posix.pod

UNIX下perl实现代码

operating system, and the C<$machine> might be a hardware identifier.
Maybe.

=item ungetc

Use method C<IO::Handle::ungetc()> instead.

=item unlink

This is identical to Perl's builtin C<unlink()> function
for removing files, see L<perlfunc/unlink>.

=item utime

This is identical to Perl's builtin C<utime()> function
for changing the time stamps of files and directories,
see L<perlfunc/utime>.

=item vfprintf

vfprintf() is C-specific, see L<perlfunc/printf> instead.

=item vprintf

vprintf() is C-specific, see L<perlfunc/printf> instead.

=item vsprintf

vsprintf() is C-specific, see L<perlfunc/sprintf> instead.

=item wait

This is identical to Perl's builtin C<wait()> function,
see L<perlfunc/wait>.

=item waitpid

Wait for a child process to change state.  This is identical to Perl's
builtin C<waitpid()> function, see L<perlfunc/waitpid>.

	$pid = POSIX::waitpid( -1, &POSIX::WNOHANG );
	print "status = ", ($? / 256), "\n";

=item wcstombs

This is identical to the C function C<wcstombs()>.
Perl does not have any support for the wide and multibyte
characters of the C standards, so this might be a rather 
useless function.

=item wctomb

This is identical to the C function C<wctomb()>.
Perl does not have any support for the wide and multibyte
characters of the C standards, so this might be a rather 
useless function.

=item write

Write to a file.  This uses file descriptors such as those obtained by
calling C<POSIX::open>.

	$fd = POSIX::open( "foo", &POSIX::O_WRONLY );
	$buf = "hello";
	$bytes = POSIX::write( $b, $buf, 5 );

Returns C<undef> on failure.

See also L<perlfunc/syswrite>.

=back

=head1 CLASSES

=head2 POSIX::SigAction

=over 8

=item new

Creates a new C<POSIX::SigAction> object which corresponds to the C
C<struct sigaction>.  This object will be destroyed automatically when it is
no longer needed.  The first parameter is the fully-qualified name of a sub
which is a signal-handler.  The second parameter is a C<POSIX::SigSet>
object, it defaults to the empty set.  The third parameter contains the
C<sa_flags>, it defaults to 0.

	$sigset = POSIX::SigSet->new(SIGINT, SIGQUIT);
	$sigaction = POSIX::SigAction->new( 'main::handler', $sigset, &POSIX::SA_NOCLDSTOP );

This C<POSIX::SigAction> object should be used with the C<POSIX::sigaction()>
function.

=back

=head2 POSIX::SigSet

=over 8

=item new

Create a new SigSet object.  This object will be destroyed automatically
when it is no longer needed.  Arguments may be supplied to initialize the
set.

Create an empty set.

	$sigset = POSIX::SigSet->new;

Create a set with SIGUSR1.

	$sigset = POSIX::SigSet->new( &POSIX::SIGUSR1 );

=item addset

Add a signal to a SigSet object.

	$sigset->addset( &POSIX::SIGUSR2 );

Returns C<undef> on failure.

=item delset

Remove a signal from the SigSet object.

	$sigset->delset( &POSIX::SIGUSR2 );

Returns C<undef> on failure.

=item emptyset

Initialize the SigSet object to be empty.

	$sigset->emptyset();

Returns C<undef> on failure.

=item fillset

Initialize the SigSet object to include all signals.

	$sigset->fillset();

Returns C<undef> on failure.

=item ismember

Tests the SigSet object to see if it contains a specific signal.

	if( $sigset->ismember( &POSIX::SIGUSR1 ) ){
		print "contains SIGUSR1\n";
	}

=back

=head2 POSIX::Termios

=over 8

=item new

Create a new Termios object.  This object will be destroyed automatically
when it is no longer needed.  A Termios object corresponds to the termios
C struct.  new() mallocs a new one, getattr() fills it from a file descriptor,
and setattr() sets a file descriptor's parameters to match Termios' contents.

	$termios = POSIX::Termios->new;

=item getattr

Get terminal control attributes.

Obtain the attributes for stdin.

	$termios->getattr()

Obtain the attributes for stdout.

	$termios->getattr( 1 )

Returns C<undef> on failure.

=item getcc

Retrieve a value from the c_cc field of a termios object.  The c_cc field is
an array so an index must be specified.

	$c_cc[1] = $termios->getcc(1);

=item getcflag

Retrieve the c_cflag field of a termios object.

	$c_cflag = $termios->getcflag;

=item getiflag

Retrieve the c_iflag field of a termios object.

	$c_iflag = $termios->getiflag;

=item getispeed

Retrieve the input baud rate.

	$ispeed = $termios->getispeed;

=item getlflag

Retrieve the c_lflag field of a termios object.

	$c_lflag = $termios->getlflag;

=item getoflag

Retrieve the c_oflag field of a termios object.

	$c_oflag = $termios->getoflag;

=item getospeed

Retrieve the output baud rate.

	$ospeed = $termios->getospeed;

=item setattr

Set terminal control attributes.

Set attributes immediately for stdout.

	$termios->setattr( 1, &POSIX::TCSANOW );

Returns C<undef> on failure.

=item setcc

Set a value in the c_cc field of a termios object.  The c_cc field is an
array so an index must be specified.

	$termios->setcc( &POSIX::VEOF, 1 );

=item setcflag

Set the c_cflag field of a termios object.

	$termios->setcflag( $c_cflag | &POSIX::CLOCAL );

=item setiflag

Set the c_iflag field of a termios object.

	$termios->setiflag( $c_iflag | &POSIX::BRKINT );

=item setispeed

Set the input baud rate.

	$termios->setispeed( &POSIX::B9600 );

Returns C<undef> on failure.

=item setlflag

Set the c_lflag field of a termios object.

	$termios->setlflag( $c_lflag | &POSIX::ECHO );

=item setoflag

Set the c_oflag field of a termios object.

	$termios->setoflag( $c_oflag | &POSIX::OPOST );

=item setospeed

Set the output baud rate.

	$termios->setospeed( &POSIX::B9600 );

Returns C<undef> on failure.

=item Baud rate values

B38400 B75 B200 B134 B300 B1800 B150 B0 B19200 B1200 B9600 B600 B4800 B50 B2400 B110

=item Terminal interface values

TCSADRAIN TCSANOW TCOON TCIOFLUSH TCOFLUSH TCION TCIFLUSH TCSAFLUSH TCIOFF TCOOFF

=item c_cc field values

VEOF VEOL VERASE VINTR VKILL VQUIT VSUSP VSTART VSTOP VMIN VTIME NCCS

=item c_cflag field values

CLOCAL CREAD CSIZE CS5 CS6 CS7 CS8 CSTOPB HUPCL PARENB PARODD

=item c_iflag field values

BRKINT ICRNL IGNBRK IGNCR IGNPAR INLCR INPCK ISTRIP IXOFF IXON PARMRK

=item c_lflag field values

ECHO ECHOE ECHOK ECHONL ICANON IEXTEN ISIG NOFLSH TOSTOP

=item c_oflag field values

OPOST

=back

=head1 PATHNAME CONSTANTS

=over 8

=item Constants

_PC_CHOWN_RESTRICTED _PC_LINK_MAX _PC_MAX_CANON _PC_MAX_INPUT _PC_NAME_MAX _PC_NO_TRUNC _PC_PATH_MAX _PC_PIPE_BUF _PC_VDISABLE

=back

=head1 POSIX CONSTANTS

=over 8

=item Constants

_POSIX_ARG_MAX _POSIX_CHILD_MAX _POSIX_CHOWN_RESTRICTED _POSIX_JOB_CONTROL _POSIX_LINK_MAX _POSIX_MAX_CANON _POSIX_MAX_INPUT _POSIX_NAME_MAX _POSIX_NGROUPS_MAX _POSIX_NO_TRUNC _POSIX_OPEN_MAX _POSIX_PATH_MAX _POSIX_PIPE_BUF _POSIX_SAVED_IDS _POSIX_SSIZE_MAX _POSIX_STREAM_MAX _POSIX_TZNAME_MAX _POSIX_VDISABLE _POSIX_VERSION

=back

=head1 SYSTEM CONFIGURATION

=over 8

=item Constants

_SC_ARG_MAX _SC_CHILD_MAX _SC_CLK_TCK _SC_JOB_CONTROL _SC_NGROUPS_MAX _SC_OPEN_MAX _SC_SAVED_IDS _SC_STREAM_MAX _SC_TZNAME_MAX _SC_VERSION

=back

=head1 ERRNO

=over 8

=item Constants

E2BIG EACCES EADDRINUSE EADDRNOTAVAIL EAFNOSUPPORT EAGAIN EALREADY EBADF
EBUSY ECHILD ECONNABORTED ECONNREFUSED ECONNRESET EDEADLK EDESTADDRREQ
EDOM EDQUOT EEXIST EFAULT EFBIG EHOSTDOWN EHOSTUNREACH EINPROGRESS EINTR
EINVAL EIO EISCONN EISDIR ELOOP EMFILE EMLINK EMSGSIZE ENAMETOOLONG
ENETDOWN ENETRESET ENETUNREACH ENFILE ENOBUFS ENODEV ENOENT ENOEXEC
ENOLCK ENOMEM ENOPROTOOPT ENOSPC ENOSYS ENOTBLK ENOTCONN ENOTDIR
ENOTEMPTY ENOTSOCK ENOTTY ENXIO EOPNOTSUPP EPERM EPFNOSUPPORT EPIPE
EPROCLIM EPROTONOSUPPORT EPROTOTYPE ERANGE EREMOTE ERESTART EROFS
ESHUTDOWN ESOCKTNOSUPPORT ESPIPE ESRCH ESTALE ETIMEDOUT ETOOMANYREFS
ETXTBSY EUSERS EWOULDBLOCK EXDEV

=back

=head1 FCNTL

=over 8

=item Constants

FD_CLOEXEC F_DUPFD F_GETFD F_GETFL F_GETLK F_OK F_RDLCK F_SETFD F_SETFL F_SETLK F_SETLKW F_UNLCK F_WRLCK O_ACCMODE O_APPEND O_CREAT O_EXCL O_NOCTTY O_NONBLOCK O_RDONLY O_RDWR O_TRUNC O_WRONLY

=back

=head1 FLOAT

=over 8

=item Constants

DBL_DIG DBL_EPSILON DBL_MANT_DIG DBL_MAX DBL_MAX_10_EXP DBL_MAX_EXP DBL_MIN DBL_MIN_10_EXP DBL_MIN_EXP FLT_DIG FLT_EPSILON FLT_MANT_DIG FLT_MAX FLT_MAX_10_EXP FLT_MAX_EXP FLT_MIN FLT_MIN_10_EXP FLT_MIN_EXP FLT_RADIX FLT_ROUNDS LDBL_DIG LDBL_EPSILON LDBL_MANT_DIG LDBL_MAX LDBL_MAX_10_EXP LDBL_MAX_EXP LDBL_MIN LDBL_MIN_10_EXP LDBL_MIN_EXP

=back

=head1 LIMITS

=over 8

=item Constants

ARG_MAX CHAR_BIT CHAR_MAX CHAR_MIN CHILD_MAX INT_MAX INT_MIN LINK_MAX LONG_MAX LONG_MIN MAX_CANON MAX_INPUT MB_LEN_MAX NAME_MAX NGROUPS_MAX OPEN_MAX PATH_MAX PIPE_BUF SCHAR_MAX SCHAR_MIN SHRT_MAX SHRT_MIN SSIZE_MAX STREAM_MAX TZNAME_MAX UCHAR_MAX UINT_MAX ULONG_MAX USHRT_MAX

=back

=head1 LOCALE

=over 8

=item Constants

LC_ALL LC_COLLATE LC_CTYPE LC_MONETARY LC_NUMERIC LC_TIME

=back

=head1 MATH

=over 8

=item Constants

HUGE_VAL

=back

=head1 SIGNAL

=over 8

=item Constants

SA_NOCLDSTOP SA_NOCLDWAIT SA_NODEFER SA_ONSTACK SA_RESETHAND SA_RESTART
SA_SIGINFO SIGABRT SIGALRM SIGCHLD SIGCONT SIGFPE SIGHUP SIGILL SIGINT
SIGKILL SIGPIPE SIGQUIT SIGSEGV SIGSTOP SIGTERM SIGTSTP SIGTTIN SIGTTOU
SIGUSR1 SIGUSR2 SIG_BLOCK SIG_DFL SIG_ERR SIG_IGN SIG_SETMASK
SIG_UNBLOCK

=back

=head1 STAT

=over 8

=item Constants

S_IRGRP S_IROTH S_IRUSR S_IRWXG S_IRWXO S_IRWXU S_ISGID S_ISUID S_IWGRP S_IWOTH S_IWUSR S_IXGRP S_IXOTH S_IXUSR

=item Macros

S_ISBLK S_ISCHR S_ISDIR S_ISFIFO S_ISREG

=back

=head1 STDLIB

=over 8

=item Constants

EXIT_FAILURE EXIT_SUCCESS MB_CUR_MAX RAND_MAX

=back

=head1 STDIO

=over 8

=item Constants

BUFSIZ EOF FILENAME_MAX L_ctermid L_cuserid L_tmpname TMP_MAX

=back

=head1 TIME

=over 8

=item Constants

CLK_TCK CLOCKS_PER_SEC

=back

=head1 UNISTD

=over 8

=item Constants

R_OK SEEK_CUR SEEK_END SEEK_SET STDIN_FILENO STDOUT_FILENO STDERR_FILENO W_OK X_OK

=back

=head1 WAIT

=over 8

=item Constants

WNOHANG WUNTRACED

=item Macros

WIFEXITED WEXITSTATUS WIFSIGNALED WTERMSIG WIFSTOPPED WSTOPSIG

=back