POSIX(3)
NNAAMMEE
POSIX - Perl interface to IEEE Std 1003.1
SSYYNNOOPPSSIISS
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
DDEESSCCRRIIPPTTIIOONN
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.
NNOOTTEE
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.
CCAAVVEEAATTSS
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.
FFUUNNCCTTIIOONNSS
_exit This is identical to the C function _exit().
abort This is identical to the C function abort().
abs This is identical to Perl's builtin abs()
function.
access Determines the accessibility of a file.
if( POSIX::access( "/", &POSIX::R_OK ) ){
print "have read permission\n";
}
Returns undef on failure.
acos This is identical to the C function acos().
alarm This is identical to Perl's builtin alarm()
function.
asctime This is identical to the C function asctime().
asin This is identical to the C function asin().
assert Unimplemented.
atan This is identical to the C function atan().
atan2 This is identical to Perl's builtin atan2()
function.
atexit atexit() is C-specific: use END {} instead.
atof atof() is C-specific.
atoi atoi() is C-specific.
atol atol() is C-specific.
bsearch bsearch() not supplied.
calloc calloc() is C-specific.
ceil This is identical to the C function ceil().
chdir This is identical to Perl's builtin chdir()
function.
chmod This is identical to Perl's builtin chmod()
function.
chown This is identical to Perl's builtin chown()
function.
clearerr
Use method IO::Handle::clearerr() instead.
clock This is identical to the C function clock().
close 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.
closedir
This is identical to Perl's builtin closedir()
function.
cos This is identical to Perl's builtin cos()
function.
cosh This is identical to the C function cosh().
creat 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 );
ctermid Generates the path name for the controlling
terminal.
$path = POSIX::ctermid();
ctime This is identical to the C function ctime().
cuserid Get the character login name of the user.
$name = POSIX::cuserid();
difftime
This is identical to the C function difftime().
div div() is C-specific.
dup This is similar to the C function dup().
This uses file descriptors such as those obtained
by calling POSIX::open.
Returns undef on failure.
dup2 This is similar to the C function dup2().
This uses file descriptors such as those obtained
by calling POSIX::open.
Returns undef on failure.
errno Returns the value of errno.
$errno = POSIX::errno();
execl execl() is C-specific.
execle execle() is C-specific.
execlp execlp() is C-specific.
execv execv() is C-specific.
execve execve() is C-specific.
execvp execvp() is C-specific.
exit This is identical to Perl's builtin exit()
function.
exp This is identical to Perl's builtin exp()
function.
fabs This is identical to Perl's builtin abs()
function.
fclose Use method IO::Handle::close() instead.
fcntl This is identical to Perl's builtin fcntl()
function.
fdopen Use method IO::Handle::new_from_fd() instead.
feof Use method IO::Handle::eof() instead.
ferror Use method IO::Handle::error() instead.
fflush Use method IO::Handle::flush() instead.
fgetc Use method IO::Handle::getc() instead.
fgetpos Use method IO::Seekable::getpos() instead.
fgets Use method IO::Handle::gets() instead.
fileno Use method IO::Handle::fileno() instead.
floor This is identical to the C function floor().
fmod This is identical to the C function fmod().
fopen Use method IO::File::open() instead.
fork This is identical to Perl's builtin fork()
function.
fpathconf
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( $fd, &POSIX::_PC_PATH_MAX );
Returns undef on failure.
fprintf fprintf() is C-specific--use printf instead.
fputc fputc() is C-specific--use print instead.
fputs fputs() is C-specific--use print instead.
fread fread() is C-specific--use read instead.
free free() is C-specific.
freopen freopen() is C-specific--use open instead.
frexp Return the mantissa and exponent of a floating-
point number.
($mantissa, $exponent) = POSIX::frexp( 3.14 );
fscanf fscanf() is C-specific--use <> and regular
expressions instead.
fseek Use method IO::Seekable::seek() instead.
fsetpos Use method IO::Seekable::setpos() instead.
fstat 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 );
ftell Use method IO::Seekable::tell() instead.
fwrite fwrite() is C-specific--use print instead.
getc This is identical to Perl's builtin getc()
function.
getchar Returns one character from STDIN.
getcwd Returns the name of the current working directory.
getegid Returns the effective group id.
getenv Returns the value of the specified enironment
variable.
geteuid Returns the effective user id.
getgid Returns the user's real group id.
getgrgid
This is identical to Perl's builtin getgrgid()
function.
getgrnam
This is identical to Perl's builtin getgrnam()
function.
getgroups
Returns the ids of the user's supplementary
groups.
getlogin
This is identical to Perl's builtin getlogin()
function.
getpgrp This is identical to Perl's builtin getpgrp()
function.
getpid Returns the process's id.
getppid This is identical to Perl's builtin getppid()
function.
getpwnam
This is identical to Perl's builtin getpwnam()
function.
getpwuid
This is identical to Perl's builtin getpwuid()
function.
gets Returns one line from STDIN.
getuid Returns the user's id.
gmtime This is identical to Perl's builtin gmtime()
function.
isalnum This is identical to the C function, except that
it can apply to a single character or to a whole
string.
isalpha This is identical to the C function, except that
it can apply to a single character or to a whole
string.
isatty Returns a boolean indicating whether the specified
filehandle is connected to a tty.
iscntrl This is identical to the C function, except that
it can apply to a single character or to a whole
string.
isdigit This is identical to the C function, except that
it can apply to a single character or to a whole
string.
isgraph This is identical to the C function, except that
it can apply to a single character or to a whole
string.
islower This is identical to the C function, except that
it can apply to a single character or to a whole
string.
isprint This is identical to the C function, except that
it can apply to a single character or to a whole
string.
ispunct This is identical to the C function, except that
it can apply to a single character or to a whole
string.
isspace This is identical to the C function, except that
it can apply to a single character or to a whole
string.
isupper This is identical to the C function, except that
it can apply to a single character or to a whole
string.
isxdigit
This is identical to the C function, except that
it can apply to a single character or to a whole
string.
kill This is identical to Perl's builtin kill()
function.
labs labs() is C-specific, use abs instead.
ldexp This is identical to the C function ldexp().
ldiv ldiv() is C-specific, use / and int instead.
link This is identical to Perl's builtin link()
function.
localeconv
Get numeric formatting information. Returns a
reference to a hash containing the current locale
formatting values.
The database for the ddee (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";
localtime
This is identical to Perl's builtin localtime()
function.
log This is identical to Perl's builtin log()
function.
log10 This is identical to the C function log10().
longjmp longjmp() is C-specific: use die instead.
lseek 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 malloc() is C-specific.
mblen This is identical to the C function mblen().
mbstowcs
This is identical to the C function mbstowcs().
mbtowc This is identical to the C function mbtowc().
memchr memchr() is C-specific, use index() instead.
memcmp memcmp() is C-specific, use eq instead.
memcpy memcpy() is C-specific, use = instead.
memmove memmove() is C-specific, use = instead.
memset memset() is C-specific, use x instead.
mkdir This is identical to Perl's builtin mkdir()
function.
mkfifo This is similar to the C function mkfifo().
Returns undef on failure.
mktime 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.
modf Return the integral and fractional parts of a
floating-point number.
($fractional, $integral) = POSIX::modf( 3.14 );
nice This is similar to the C function nice().
Returns undef on failure.
offsetof
offsetof() is C-specific.
open 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.
opendir Open a directory for reading.
$dir = POSIX::opendir( "/tmp" );
@files = POSIX::readdir( $dir );
POSIX::closedir( $dir );
Returns undef on failure.
pathconf
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.
$path_max = POSIX::pathconf( "/tmp", &POSIX::_PC_PATH_MAX );
Returns undef on failure.
pause This is similar to the C function pause().
Returns undef on failure.
perror This is identical to the C function perror().
pipe Create an interprocess channel. This returns file
descriptors like those returned by POSIX::open.
($fd0, $fd1) = POSIX::pipe();
POSIX::write( $fd0, "hello", 5 );
POSIX::read( $fd1, $buf, 5 );
pow Computes $x raised to the power $exponent.
$ret = POSIX::pow( $x, $exponent );
printf Prints the specified arguments to STDOUT.
putc putc() is C-specific--use print instead.
putchar putchar() is C-specific--use print instead.
puts puts() is C-specific--use print instead.
qsort qsort() is C-specific, use sort instead.
raise Sends the specified signal to the current process.
rand rand() is non-portable, use Perl's rand instead.
read 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.
readdir This is identical to Perl's builtin readdir()
function.
realloc realloc() is C-specific.
remove This is identical to Perl's builtin unlink()
function.
rename This is identical to Perl's builtin rename()
function.
rewind Seeks to the beginning of the file.
rewinddir
This is identical to Perl's builtin rewinddir()
function.
rmdir This is identical to Perl's builtin rmdir()
function.
scanf scanf() is C-specific--use <> and regular
expressions instead.
setgid Sets the real group id for this process.
setjmp setjmp() is C-specific: use eval {} instead.
setlocale
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 the
setlocale(3) manpage 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. NNOOTTEE: 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" );
setpgid This is similar to the C function setpgid().
Returns undef on failure.
setsid This is identical to the C function setsid().
setuid Sets the real user id for this process.
sigaction
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
siglongjmp() is C-specific: use die instead.
sigpending
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.
sigprocmask
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
sigsetjmp() is C-specific: use eval {} instead.
sigsuspend
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.
sin This is identical to Perl's builtin sin()
function.
sinh This is identical to the C function sinh().
sleep This is identical to Perl's builtin sleep()
function.
sprintf This is identical to Perl's builtin sprintf()
function.
sqrt This is identical to Perl's builtin sqrt()
function.
srand srand().
sscanf sscanf() is C-specific--use regular expressions
instead.
stat This is identical to Perl's builtin stat()
function.
strcat strcat() is C-specific, use .= instead.
strchr strchr() is C-specific, use index() instead.
strcmp strcmp() is C-specific, use eq instead.
strcoll This is identical to the C function strcoll().
strcpy strcpy() is C-specific, use = instead.
strcspn strcspn() is C-specific, use regular expressions
instead.
strerror
Returns the error string for the specified errno.
strftime
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 strlen() is C-specific, use length instead.
strncat strncat() is C-specific, use .= instead.
strncmp strncmp() is C-specific, use eq instead.
strncpy strncpy() is C-specific, use = instead.
stroul stroul() is C-specific.
strpbrk strpbrk() is C-specific.
strrchr strrchr() is C-specific, use rindex() instead.
strspn strspn() is C-specific.
strstr This is identical to Perl's builtin index()
function.
strtod 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 strtok() is C-specific.
strtol 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.
strtoul 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.
strxfrm String transformation. Returns the transformed
string.
$dst = POSIX::strxfrm( $src );
sysconf Retrieves values of system configurable variables.
The following will get the machine's clock speed.
$clock_ticks = POSIX::sysconf( &POSIX::_SC_CLK_TCK );
Returns undef on failure.
system This is identical to Perl's builtin system()
function.
tan This is identical to the C function tan().
tanh This is identical to the C function tanh().
tcdrain This is similar to the C function tcdrain().
Returns undef on failure.
tcflow This is similar to the C function tcflow().
Returns undef on failure.
tcflush This is similar to the C function tcflush().
Returns undef on failure.
tcgetpgrp
This is identical to the C function tcgetpgrp().
tcsendbreak
This is similar to the C function tcsendbreak().
Returns undef on failure.
tcsetpgrp
This is similar to the C function tcsetpgrp().
Returns undef on failure.
time This is identical to Perl's builtin time()
function.
times The times() function returns elapsed realtime
since some point in the past (such as system
startup), user and system times for this process,
and user and system times used by child processes.
All times are returned in clock ticks.
($realtime, $user, $system, $cuser, $csystem) = POSIX::times();
Note: Perl's builtin times() function returns four
values, measured in seconds.
tmpfile Use method IO::File::new_tmpfile() instead.
tmpnam Returns a name for a temporary file.
$tmpfile = POSIX::tmpnam();
tolower This is identical to Perl's builtin lc() function.
toupper This is identical to Perl's builtin uc() function.
ttyname This is identical to the C function ttyname().
tzname Retrieves the time conversion information from the
tzname variable.
POSIX::tzset();
($std, $dst) = POSIX::tzname();
tzset This is identical to the C function tzset().
umask This is identical to Perl's builtin umask()
function.
uname Get name of current operating system.
($sysname, $nodename, $release, $version, $machine ) = POSIX::uname();
ungetc Use method IO::Handle::ungetc() instead.
unlink This is identical to Perl's builtin unlink()
function.
utime This is identical to Perl's builtin utime()
function.
vfprintf
vfprintf() is C-specific.
vprintf vprintf() is C-specific.
vsprintf
vsprintf() is C-specific.
wait This is identical to Perl's builtin wait()
function.
waitpid 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";
wcstombs
This is identical to the C function wcstombs().
wctomb This is identical to the C function wctomb().
write 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.
CCLLAASSSSEESS
PPOOSSIIXX::::SSiiggAAccttiioonn
new 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.
PPOOSSIIXX::::SSiiggSSeett
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 );
addset Add a signal to a SigSet object.
$sigset->addset( &POSIX::SIGUSR2 );
Returns undef on failure.
delset Remove a signal from the SigSet object.
$sigset->delset( &POSIX::SIGUSR2 );
Returns undef on failure.
emptyset
Initialize the SigSet object to be empty.
$sigset->emptyset();
Returns undef on failure.
fillset Initialize the SigSet object to include all
signals.
$sigset->fillset();
Returns undef on failure.
ismember
Tests the SigSet object to see if it contains a
specific signal.
if( $sigset->ismember( &POSIX::SIGUSR1 ) ){
print "contains SIGUSR1\n";
}
PPOOSSIIXX::::TTeerrmmiiooss
new Create a new Termios object. This object will be
destroyed automatically when it is no longer
needed.
$termios = POSIX::Termios->new;
getattr Get terminal control attributes.
Obtain the attributes for stdin.
$termios->getattr()
Obtain the attributes for stdout.
$termios->getattr( 1 )
Returns undef on failure.
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);
getcflag
Retrieve the c_cflag field of a termios object.
$c_cflag = $termios->getcflag;
getiflag
Retrieve the c_iflag field of a termios object.
$c_iflag = $termios->getiflag;
getispeed
Retrieve the input baud rate.
$ispeed = $termios->getispeed;
getlflag
Retrieve the c_lflag field of a termios object.
$c_lflag = $termios->getlflag;
getoflag
Retrieve the c_oflag field of a termios object.
$c_oflag = $termios->getoflag;
getospeed
Retrieve the output baud rate.
$ospeed = $termios->getospeed;
setattr Set terminal control attributes.
Set attributes immediately for stdout.
$termios->setattr( 1, &POSIX::TCSANOW );
Returns undef on failure.
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 );
setcflag
Set the c_cflag field of a termios object.
$termios->setcflag( &POSIX::CLOCAL );
setiflag
Set the c_iflag field of a termios object.
$termios->setiflag( &POSIX::BRKINT );
setispeed
Set the input baud rate.
$termios->setispeed( &POSIX::B9600 );
Returns undef on failure.
setlflag
Set the c_lflag field of a termios object.
$termios->setlflag( &POSIX::ECHO );
setoflag
Set the c_oflag field of a termios object.
$termios->setoflag( &POSIX::OPOST );
setospeed
Set the output baud rate.
$termios->setospeed( &POSIX::B9600 );
Returns undef on failure.
Baud rate values
B38400 B75 B200 B134 B300 B1800 B150 B0 B19200
B1200 B9600 B600 B4800 B50 B2400 B110
Terminal interface values
TCSADRAIN TCSANOW TCOON TCIOFLUSH TCOFLUSH TCION
TCIFLUSH TCSAFLUSH TCIOFF TCOOFF
c_cc field values
VEOF VEOL VERASE VINTR VKILL VQUIT VSUSP VSTART
VSTOP VMIN VTIME NCCS
c_cflag field values
CLOCAL CREAD CSIZE CS5 CS6 CS7 CS8 CSTOPB HUPCL
PARENB PARODD
c_iflag field values
BRKINT ICRNL IGNBRK IGNCR IGNPAR INLCR INPCK
ISTRIP IXOFF IXON PARMRK
c_lflag field values
ECHO ECHOE ECHOK ECHONL ICANON IEXTEN ISIG NOFLSH
TOSTOP
c_oflag field values
OPOST
PPAATTHHNNAAMMEE CCOONNSSTTAANNTTSS
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
PPOOSSIIXX CCOONNSSTTAANNTTSS
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
SSYYSSTTEEMM CCOONNFFIIGGUURRAATTIIOONN
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
EERRRRNNOO
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
FFCCNNTTLL
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
FFLLOOAATT
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
LLIIMMIITTSS
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
LLOOCCAALLEE
Constants
LC_ALL LC_COLLATE LC_CTYPE LC_MONETARY LC_NUMERIC
LC_TIME
MMAATTHH
Constants
HUGE_VAL
SSIIGGNNAALL
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
SSTTAATT
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
Macros S_ISBLK S_ISCHR S_ISDIR S_ISFIFO S_ISREG
SSTTDDLLIIBB
Constants
EXIT_FAILURE EXIT_SUCCESS MB_CUR_MAX RAND_MAX
SSTTDDIIOO
Constants
BUFSIZ EOF FILENAME_MAX L_ctermid L_cuserid
L_tmpname TMP_MAX
TTIIMMEE
Constants
CLK_TCK CLOCKS_PER_SEC
UUNNIISSTTDD
Constants
R_OK SEEK_CUR SEEK_END SEEK_SET STDIN_FILENO
STDOUT_FILENO STRERR_FILENO W_OK X_OK
WWAAIITT
Constants
WNOHANG WUNTRACED
Macros WIFEXITED WEXITSTATUS WIFSIGNALED WTERMSIG
WIFSTOPPED WSTOPSIG
CCRREEAATTIIOONN
This document generated by ./mkposixman.PL version
19960129.