POSIX - Perl interface to IEEE Std 1003.1
use POSIX;
use POSIX qw(setsid);
use POSIX qw(:errno_h :fcntl_h);
printf "EINTR is %d\n", EINTR;
$sess_id = POSIX::setsid();
$fd = POSIX::open($path, O_CREAT|O_EXCL|O_WRONLY, 0644);
# note: that's a filedescriptor, *NOT* a filehandle
The
POSIX module permits you to access all (or nearly all) the standard
POSIX 1003.1 identifiers. Many of these identifiers have been given Perl-ish interfaces. Things which are
#defines in
C, like
EINTR or
O_NDELAY, are automatically exported into your namespace. All functions are only exported if you ask for them explicitly. Most likely people will prefer to use the fully-qualified function names.
This document gives a condensed list of the features available in the POSIX module. Consult your operating system's manpages for general information on most features. Consult the perlfunc manpage for functions which are noted as being identical to Perl's builtin functions.
The first section describes POSIX functions from the 1003.1 specification. The second section describes some classes for signal objects, TTY objects, and other miscellaneous objects. The remaining sections list various constants and macros in an organization which roughly follows IEEE Std 1003.1b-1993.
The POSIX module is probably the most complex Perl module supplied with the standard distribution. It incorporates autoloading, namespace games, and dynamic loading of code that's in Perl, C, or both. It's a great source of wisdom.
A few functions are not implemented because they are
C specific. If you attempt to call these, they will print a message telling you that they aren't implemented, and suggest using the Perl equivalent should one exist. For example, trying to access the setjmp() call will elicit the message ``setjmp() is C-specific: use eval {} instead''.
Furthermore, some evil vendors will claim 1003.1 compliance, but in fact are not so: they will not pass the
PCTS
(POSIX Compliance Test Suites). For example, one vendor may not define
EDEADLK, or the semantics of the errno values set by open(2) might not be quite right. Perl does not attempt to verify
POSIX compliance. That means you can currently successfully say ``use
POSIX'', and then later in your program you find that your vendor has been lax and there's no usable
ICANON macro after all. This could be construed to be a bug.
This is identical to the C function _exit().
This is identical to the C function abort().
This is identical to Perl's builtin abs() function.
Determines the accessibility of a file.
if( POSIX::access( "/", &POSIX::R_OK ) ){
print "have read permission\n";
}
Returns undef on failure.
This is identical to the C function acos().
This is identical to Perl's builtin alarm() function.
This is identical to the C function asctime().
This is identical to the C function asin().
Unimplemented.
This is identical to the C function atan().
This is identical to Perl's builtin atan2() function.
atexit() is C-specific: use
END {} instead.
atof() is C-specific.
atoi() is C-specific.
atol() is C-specific.
bsearch() not supplied.
calloc() is C-specific.
This is identical to the C function ceil().
This is identical to Perl's builtin chdir() function.
This is identical to Perl's builtin chmod() function.
This is identical to Perl's builtin chown() function.
Use method IO::Handle::clearerr() instead.
This is identical to the C function clock().
Close the file. This uses file descriptors such as those obtained by
calling
POSIX::open.
$fd = POSIX::open( "foo", &POSIX::O_RDONLY );
POSIX::close( $fd );
Returns undef on failure.
This is identical to Perl's builtin closedir() function.
This is identical to Perl's builtin cos() function.
This is identical to the C function cosh().
Create a new file. This returns a file descriptor like the ones returned by
POSIX::open. Use POSIX::close to close the file.
$fd = POSIX::creat( "foo", 0611 );
POSIX::close( $fd );
Generates the path name for the controlling terminal.
$path = POSIX::ctermid();
This is identical to the C function ctime().
Get the character login name of the user.
$name = POSIX::cuserid();
This is identical to the C function difftime().
div() is C-specific.
This is similar to the C function dup().
This uses file descriptors such as those obtained by calling
POSIX::open.
Returns undef on failure.
This is similar to the C function dup2().
This uses file descriptors such as those obtained by calling
POSIX::open.
Returns undef on failure.
Returns the value of errno.
$errno = POSIX::errno();
execl() is C-specific.
execle() is C-specific.
execlp() is C-specific.
execv() is C-specific.
execve() is C-specific.
execvp() is C-specific.
This is identical to Perl's builtin exit() function.
This is identical to Perl's builtin exp() function.
This is identical to Perl's builtin abs() function.
Use method IO::Handle::close() instead.
This is identical to Perl's builtin fcntl() function.
Use method IO::Handle::new_from_fd() instead.
Use method IO::Handle::eof() instead.
Use method IO::Handle::error() instead.
Use method IO::Handle::flush() instead.
Use method IO::Handle::getc() instead.
Use method IO::Seekable::getpos() instead.
Use method IO::Handle::gets() instead.
Use method IO::Handle::fileno() instead.
This is identical to the C function floor().
This is identical to the C function fmod().
Use method IO::File::open() instead.
This is identical to Perl's builtin fork() function.
Retrieves the value of a configurable limit on a file or directory. This
uses file descriptors such as those obtained by calling POSIX::open.
The following will determine the maximum length of the longest allowable
pathname on the filesystem which holds /tmp/foo.
$fd = POSIX::open( "/tmp/foo", &POSIX::O_RDONLY );
$path_max = POSIX::fpathconf( $fd, &POSIX::_PC_PATH_MAX );
Returns undef on failure.
fprintf() is C-specific--use printf instead.
fputc() is C-specific--use print instead.
fputs() is C-specific--use print instead.
fread() is C-specific--use read instead.
free() is C-specific.
freopen() is C-specific--use open instead.
Return the mantissa and exponent of a floating-point number.
($mantissa, $exponent) = POSIX::frexp( 3.14 );
fscanf() is C-specific--use <> and regular expressions
instead.
Use method IO::Seekable::seek() instead.
Use method IO::Seekable::setpos() instead.
Get file status. This uses file descriptors such as those obtained by
calling POSIX::open. The data returned is identical to the data from Perl's builtin stat function.
$fd = POSIX::open( "foo", &POSIX::O_RDONLY );
@stats = POSIX::fstat( $fd );
Use method IO::Seekable::tell() instead.
fwrite() is C-specific--use print instead.
This is identical to Perl's builtin getc() function.
Returns one character from STDIN.
Returns the name of the current working directory.
Returns the effective group id.
Returns the value of the specified enironment variable.
Returns the effective user id.
Returns the user's real group id.
This is identical to Perl's builtin getgrgid() function.
This is identical to Perl's builtin getgrnam() function.
Returns the ids of the user's supplementary groups.
This is identical to Perl's builtin getlogin() function.
This is identical to Perl's builtin getpgrp() function.
Returns the process's id.
This is identical to Perl's builtin getppid() function.
This is identical to Perl's builtin getpwnam() function.
This is identical to Perl's builtin getpwuid() function.
Returns one line from STDIN.
Returns the user's id.
This is identical to Perl's builtin gmtime() function.
This is identical to the C function, except that it can apply to a single character or to a whole string.
This is identical to the C function, except that it can apply to a single character or to a whole string.
Returns a boolean indicating whether the specified filehandle is connected to a tty.
This is identical to the C function, except that it can apply to a single character or to a whole string.
This is identical to the C function, except that it can apply to a single character or to a whole string.
This is identical to the C function, except that it can apply to a single character or to a whole string.
This is identical to the C function, except that it can apply to a single character or to a whole string.
This is identical to the C function, except that it can apply to a single character or to a whole string.
This is identical to the C function, except that it can apply to a single character or to a whole string.
This is identical to the C function, except that it can apply to a single character or to a whole string.
This is identical to the C function, except that it can apply to a single character or to a whole string.
This is identical to the C function, except that it can apply to a single character or to a whole string.
This is identical to Perl's builtin kill() function.
labs() is C-specific, use abs instead.
This is identical to the C function ldexp().
ldiv() is C-specific, use / and int instead.
This is identical to Perl's builtin link() function.
Get numeric formatting information. Returns a reference to a hash containing the current locale formatting values.
The database for the de (Deutsch or German) locale.
$loc = POSIX::setlocale( &POSIX::LC_ALL, "de" );
print "Locale = $loc\n";
$lconv = POSIX::localeconv();
print "decimal_point = ", $lconv->{decimal_point}, "\n";
print "thousands_sep = ", $lconv->{thousands_sep}, "\n";
print "grouping = ", $lconv->{grouping}, "\n";
print "int_curr_symbol = ", $lconv->{int_curr_symbol}, "\n";
print "currency_symbol = ", $lconv->{currency_symbol}, "\n";
print "mon_decimal_point = ", $lconv->{mon_decimal_point}, "\n";
print "mon_thousands_sep = ", $lconv->{mon_thousands_sep}, "\n";
print "mon_grouping = ", $lconv->{mon_grouping}, "\n";
print "positive_sign = ", $lconv->{positive_sign}, "\n";
print "negative_sign = ", $lconv->{negative_sign}, "\n";
print "int_frac_digits = ", $lconv->{int_frac_digits}, "\n";
print "frac_digits = ", $lconv->{frac_digits}, "\n";
print "p_cs_precedes = ", $lconv->{p_cs_precedes}, "\n";
print "p_sep_by_space = ", $lconv->{p_sep_by_space}, "\n";
print "n_cs_precedes = ", $lconv->{n_cs_precedes}, "\n";
print "n_sep_by_space = ", $lconv->{n_sep_by_space}, "\n";
print "p_sign_posn = ", $lconv->{p_sign_posn}, "\n";
print "n_sign_posn = ", $lconv->{n_sign_posn}, "\n";
This is identical to Perl's builtin localtime() function.
This is identical to Perl's builtin log() function.
This is identical to the C function log10().
longjmp() is C-specific: use die instead.
Move the file's read/write position. This uses file descriptors such as
those obtained by calling POSIX::open.
$fd = POSIX::open( "foo", &POSIX::O_RDONLY );
$off_t = POSIX::lseek( $fd, 0, &POSIX::SEEK_SET );
Returns undef on failure.
malloc() is C-specific.
This is identical to the C function mblen().
This is identical to the C function mbstowcs().
This is identical to the C function mbtowc().
memchr() is C-specific, use index() instead.
memcmp() is C-specific, use eq instead.
memcpy() is C-specific, use = instead.
memmove() is C-specific, use = instead.
memset() is C-specific, use x instead.
This is identical to Perl's builtin mkdir() function.
This is similar to the C function mkfifo().
Returns undef on failure.
Convert date/time info to a calendar time.
Synopsis:
mktime(sec, min, hour, mday, mon, year, wday = 0, yday = 0, isdst = 0)
The month (mon), weekday (wday), and yearday (yday) begin at zero. I.e. January is 0, not 1; Sunday is 0, not 1; January 1st
is 0, not 1. The year (year) is given in years since 1900. I.e. The year 1995 is 95; the year 2001 is
101. Consult your system's mktime() manpage for details about these and the other arguments.
Calendar time for December 12, 1995, at 10:30 am.
$time_t = POSIX::mktime( 0, 30, 10, 12, 11, 95 );
print "Date = ", POSIX::ctime($time_t);
Returns undef on failure.
Return the integral and fractional parts of a floating-point number.
($fractional, $integral) = POSIX::modf( 3.14 );
This is similar to the C function nice().
Returns undef on failure.
offsetof() is C-specific.
Open a file for reading for writing. This returns file descriptors, not
Perl filehandles. Use POSIX::close to close the file.
Open a file read-only with mode 0666.
$fd = POSIX::open( "foo" );
Open a file for read and write.
$fd = POSIX::open( "foo", &POSIX::O_RDWR );
Open a file for write, with truncation.
$fd = POSIX::open( "foo", &POSIX::O_WRONLY | &POSIX::O_TRUNC );
Create a new file with mode 0640. Set up the file for writing.
$fd = POSIX::open( "foo", &POSIX::O_CREAT | &POSIX::O_WRONLY, 0640 );
Returns undef on failure.
Open a directory for reading.
$dir = POSIX::opendir( "/tmp" );
@files = POSIX::readdir( $dir );
POSIX::closedir( $dir );
Returns undef on failure.
Retrieves the value of a configurable limit on a file or directory.
The following will determine the maximum length of the longest allowable
pathname on the filesystem which holds /tmp.
$path_max = POSIX::pathconf( "/tmp", &POSIX::_PC_PATH_MAX );
Returns undef on failure.
This is similar to the C function pause().
Returns undef on failure.
This is identical to the C function perror().
Create an interprocess channel. This returns file descriptors like those
returned by POSIX::open.
($fd0, $fd1) = POSIX::pipe();
POSIX::write( $fd0, "hello", 5 );
POSIX::read( $fd1, $buf, 5 );
Computes $x raised to the power $exponent.
$ret = POSIX::pow( $x, $exponent );
Prints the specified arguments to STDOUT.
putc() is C-specific--use print instead.
putchar() is C-specific--use print instead.
puts() is C-specific--use print instead.
qsort() is C-specific, use sort instead.
Sends the specified signal to the current process.
rand() is non-portable, use Perl's rand instead.
Read from a file. This uses file descriptors such as those obtained by
calling POSIX::open. If the buffer $buf is not large enough for the read then Perl will extend it to make room for
the request.
$fd = POSIX::open( "foo", &POSIX::O_RDONLY );
$bytes = POSIX::read( $fd, $buf, 3 );
Returns undef on failure.
This is identical to Perl's builtin readdir() function.
realloc() is C-specific.
This is identical to Perl's builtin unlink() function.
This is identical to Perl's builtin rename() function.
Seeks to the beginning of the file.
This is identical to Perl's builtin rewinddir() function.
This is identical to Perl's builtin rmdir() function.
scanf() is C-specific--use <> and regular expressions
instead.
Sets the real group id for this process.
setjmp() is C-specific: use eval {} instead.
Modifies and queries program's locale.
The following will set the traditional UNIX system locale behavior (the second argument "C").
$loc = POSIX::setlocale( &POSIX::LC_ALL, "C" );
The following will query (the missing second argument) the current LC_CTYPE category.
$loc = POSIX::setlocale( &POSIX::LC_CTYPE);
The following will set the
LC_CTYPE behaviour according to the locale environment
variables (the second argument ""). Please see your systems setlocale(3) documentation for the locale environment variables' meaning or consult the perllocale manpage.
$loc = POSIX::setlocale( &POSIX::LC_CTYPE, "");
The following will set the LC_COLLATE behaviour to Argentinian Spanish. NOTE: The naming and availability of locales depends on your operating system. Please consult the perllocale manpage for how to find out which locales are available in your system.
$loc = POSIX::setlocale( &POSIX::LC_ALL, "es_AR.ISO8859-1" );
This is similar to the C function setpgid().
Returns undef on failure.
This is identical to the C function setsid().
Sets the real user id for this process.
Detailed signal management. This uses POSIX::SigAction objects for the
action and oldaction arguments. Consult your system's sigaction
manpage for details.
Synopsis:
sigaction(sig, action, oldaction = 0)
Returns undef on failure.
siglongjmp() is C-specific: use die instead.
Examine signals that are blocked and pending. This uses POSIX::SigSet
objects for the sigset argument. Consult your system's sigpending
manpage for details.
Synopsis:
sigpending(sigset)
Returns undef on failure.
Change and/or examine calling process's signal mask. This uses
POSIX::SigSet objects for the sigset and oldsigset arguments. Consult your system's sigprocmask manpage for details.
Synopsis:
sigprocmask(how, sigset, oldsigset = 0)
Returns undef on failure.
sigsetjmp() is C-specific: use eval {} instead.
Install a signal mask and suspend process until signal arrives. This uses
POSIX::SigSet objects for the signal_mask argument. Consult your system's sigsuspend manpage for details.
Synopsis:
sigsuspend(signal_mask)
Returns undef on failure.
This is identical to Perl's builtin sin() function.
This is identical to the C function sinh().
This is identical to Perl's builtin sleep() function.
This is identical to Perl's builtin sprintf() function.
This is identical to Perl's builtin sqrt() function.
srand().
sscanf() is C-specific--use regular expressions instead.
This is identical to Perl's builtin stat() function.
strcat() is C-specific, use .= instead.
strchr() is C-specific, use index() instead.
strcmp() is C-specific, use eq instead.
This is identical to the C function strcoll().
strcpy() is C-specific, use = instead.
strcspn() is C-specific, use regular expressions instead.
Returns the error string for the specified errno.
Convert date and time information to string. Returns the string.
Synopsis:
strftime(fmt, sec, min, hour, mday, mon, year, wday = 0, yday = 0, isdst = 0)
The month (mon), weekday (wday), and yearday (yday) begin at zero. I.e. January is 0, not 1; Sunday is 0, not 1; January 1st
is 0, not 1. The year (year) is given in years since 1900. I.e. The year 1995 is 95; the year 2001 is
101. Consult your system's strftime() manpage for details about these and the other arguments.
The string for Tuesday, December 12, 1995.
$str = POSIX::strftime( "%A, %B %d, %Y", 0, 0, 0, 12, 11, 95, 2 );
print "$str\n";
strlen() is C-specific, use length instead.
strncat() is C-specific, use .= instead.
strncmp() is C-specific, use eq instead.
strncpy() is C-specific, use = instead.
stroul() is C-specific.
strpbrk() is C-specific.
strrchr() is C-specific, use rindex() instead.
strspn() is C-specific.
This is identical to Perl's builtin index() function.
String to double translation. Returns the parsed number and the number of characters in the unparsed portion of the string. Truly POSIX-compliant systems set $! ($ERRNO) to indicate a translation error, so clear $! before calling strtod. However, non-POSIX systems may not check for overflow, and therefore will never set $!.
strtod should respect any POSIX setlocale() settings.
To parse a string $str as a floating point number use
$! = 0;
($num, $n_unparsed) = POSIX::strtod($str);
The second returned item and $! can be used to check for valid input:
if (($str eq '') || ($n_unparsed != 0) || !$!) {
die "Non-numeric input $str" . $! ? ": $!\n" : "\n";
}
When called in a scalar context strtod returns the parsed number.
strtok() is C-specific.
String to (long) integer translation. Returns the parsed number and the number of characters in the unparsed portion of the string. Truly POSIX-compliant systems set $! ($ERRNO) to indicate a translation error, so clear $! before calling strtol. However, non-POSIX systems may not check for overflow, and therefore will never set $!.
strtol should respect any POSIX setlocale() settings.
To parse a string $str as a number in some base
$base use
$! = 0;
($num, $n_unparsed) = POSIX::strtol($str, $base);
The base should be zero or between 2 and 36, inclusive. When the base is zero or omitted strtol will use the string itself to determine the base: a leading ``0x'' or ``0X'' means hexadecimal; a leading ``0'' means octal; any other leading characters mean decimal. Thus, ``1234'' is parsed as a decimal number, ``01234'' as an octal number, and ``0x1234'' as a hexadecimal number.
The second returned item and $! can be used to check for valid input:
if (($str eq '') || ($n_unparsed != 0) || !$!) {
die "Non-numeric input $str" . $! ? ": $!\n" : "\n";
}
When called in a scalar context strtol returns the parsed number.
String to unsigned (long) integer translation. strtoul is identical to strtol except that strtoul only parses unsigned integers. See strtol for details.
Note: Some vendors supply strtod and strtol but not strtoul. Other vendors that do suply strtoul parse ``-1'' as a valid value.
String transformation. Returns the transformed string.
$dst = POSIX::strxfrm( $src );
Retrieves values of system configurable variables.
The following will get the machine's clock speed.
$clock_ticks = POSIX::sysconf( &POSIX::_SC_CLK_TCK );
Returns undef on failure.
This is identical to Perl's builtin system() function.
This is identical to the C function tan().
This is identical to the C function tanh().
This is similar to the C function tcdrain().
Returns undef on failure.
This is similar to the C function tcflow().
Returns undef on failure.
This is similar to the C function tcflush().
Returns undef on failure.
This is identical to the C function tcgetpgrp().
This is similar to the C function tcsendbreak().
Returns undef on failure.
This is similar to the C function tcsetpgrp().
Returns undef on failure.
This is identical to Perl's builtin time() function.
The times() function returns elapsed realtime since some point
in the past (such as system startup), user and system times for this
process, and user and system times used by child processes. All times are
returned in clock ticks.
($realtime, $user, $system, $cuser, $csystem) = POSIX::times();
Note: Perl's builtin times() function returns four values, measured in seconds.
Use method IO::File::new_tmpfile() instead.
Returns a name for a temporary file.
$tmpfile = POSIX::tmpnam();
This is identical to Perl's builtin lc() function.
This is identical to Perl's builtin uc() function.
This is identical to the C function ttyname().
Retrieves the time conversion information from the tzname variable.
POSIX::tzset();
($std, $dst) = POSIX::tzname();
This is identical to the C function tzset().
This is identical to Perl's builtin umask() function.
Get name of current operating system.
($sysname, $nodename, $release, $version, $machine ) = POSIX::uname();
Use method IO::Handle::ungetc() instead.
This is identical to Perl's builtin unlink() function.
This is identical to Perl's builtin utime() function.
vfprintf() is C-specific.
vprintf() is C-specific.
vsprintf() is C-specific.
This is identical to Perl's builtin wait() function.
Wait for a child process to change state. This is identical to Perl's builtin waitpid() function.
$pid = POSIX::waitpid( -1, &POSIX::WNOHANG );
print "status = ", ($? / 256), "\n";
This is identical to the C function wcstombs().
This is identical to the C function wctomb().
Write to a file. This uses file descriptors such as those obtained by
calling POSIX::open.
$fd = POSIX::open( "foo", &POSIX::O_WRONLY );
$buf = "hello";
$bytes = POSIX::write( $b, $buf, 5 );
Returns undef on failure.
Creates a new POSIX::SigAction object which corresponds to the
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 POSIX::SigSet
object, it defaults to the empty set. The third parameter contains the
sa_flags, it defaults to 0.
$sigset = POSIX::SigSet->new(SIGINT, SIGQUIT);
$sigaction = POSIX::SigAction->new( 'main::handler', $sigset, &POSIX::SA_NOCLDSTOP );
This POSIX::SigAction object should be used with the POSIX::sigaction()
function.
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 );
Add a signal to a SigSet object.
$sigset->addset( &POSIX::SIGUSR2 );
Returns undef on failure.
Remove a signal from the SigSet object.
$sigset->delset( &POSIX::SIGUSR2 );
Returns undef on failure.
Initialize the SigSet object to be empty.
$sigset->emptyset();
Returns undef on failure.
Initialize the SigSet object to include all signals.
$sigset->fillset();
Returns undef on failure.
Tests the SigSet object to see if it contains a specific signal.
if( $sigset->ismember( &POSIX::SIGUSR1 ) ){
print "contains SIGUSR1\n";
}
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;
Get terminal control attributes.
Obtain the attributes for stdin.
$termios->getattr()
Obtain the attributes for stdout.
$termios->getattr( 1 )
Returns undef on failure.
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);
Retrieve the c_cflag field of a termios object.
$c_cflag = $termios->getcflag;
Retrieve the c_iflag field of a termios object.
$c_iflag = $termios->getiflag;
Retrieve the input baud rate.
$ispeed = $termios->getispeed;
Retrieve the c_lflag field of a termios object.
$c_lflag = $termios->getlflag;
Retrieve the c_oflag field of a termios object.
$c_oflag = $termios->getoflag;
Retrieve the output baud rate.
$ospeed = $termios->getospeed;
Set terminal control attributes.
Set attributes immediately for stdout.
$termios->setattr( 1, &POSIX::TCSANOW );
Returns undef on failure.
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 );
Set the c_cflag field of a termios object.
$termios->setcflag( $c_cflag | &POSIX::CLOCAL );
Set the c_iflag field of a termios object.
$termios->setiflag( $c_iflag | &POSIX::BRKINT );
Set the input baud rate.
$termios->setispeed( &POSIX::B9600 );
Returns undef on failure.
Set the c_lflag field of a termios object.
$termios->setlflag( $c_lflag | &POSIX::ECHO );
Set the c_oflag field of a termios object.
$termios->setoflag( $c_oflag | &POSIX::OPOST );
Set the output baud rate.
$termios->setospeed( &POSIX::B9600 );
Returns undef on failure.
B38400 B75 B200 B134 B300 B1800 B150 B0 B19200 B1200 B9600 B600 B4800 B50 B2400 B110
TCSADRAIN TCSANOW TCOON TCIOFLUSH TCOFLUSH TCION TCIFLUSH TCSAFLUSH TCIOFF TCOOFF
VEOF VEOL VERASE VINTR VKILL VQUIT VSUSP VSTART VSTOP VMIN VTIME NCCS
CLOCAL CREAD CSIZE CS5 CS6 CS7 CS8 CSTOPB HUPCL PARENB PARODD
BRKINT ICRNL IGNBRK IGNCR IGNPAR INLCR INPCK ISTRIP IXOFF IXON PARMRK
ECHO ECHOE ECHOK ECHONL ICANON IEXTEN ISIG NOFLSH TOSTOP
OPOST
_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
_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
_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
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
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
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
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
LC_ALL LC_COLLATE LC_CTYPE LC_MONETARY LC_NUMERIC LC_TIME
HUGE_VAL
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
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
S_ISBLK S_ISCHR S_ISDIR S_ISFIFO S_ISREG
EXIT_FAILURE EXIT_SUCCESS MB_CUR_MAX RAND_MAX
BUFSIZ EOF FILENAME_MAX L_ctermid L_cuserid L_tmpname TMP_MAX
CLK_TCK CLOCKS_PER_SEC
R_OK SEEK_CUR SEEK_END SEEK_SET STDIN_FILENO STDOUT_FILENO STRERR_FILENO W_OK X_OK
WNOHANG WUNTRACED
WIFEXITED WEXITSTATUS WIFSIGNALED WTERMSIG WIFSTOPPED WSTOPSIG
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