POSIX - Perl interface to IEEE Std 1003.1
SYNOPSIS
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
DESCRIPTION
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 func
tion 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 fea
tures. 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 miscel
laneous objects. The remaining sections list various con
stants and macros in an organization which roughly follows
IEEE Std 1003.1b-1993.
NOTE
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 wis
dom.
CAVEATS
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 sug
gest 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".
ance, 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 val
ues 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.
FUNCTIONS
_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()' func
tion.
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.
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()' func
tion.
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 termi
nal.
$path = POSIX::ctermid();
ctime This is identical to the C function `ctime()'.
cuserid Get the character login name of the user.
$name = POSIX::cuserid();
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()' func
tion.
exp This is identical to Perl's builtin `exp()' func
tion.
fabs This is identical to Perl's builtin `abs()' func
tion.
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.
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()' func
tion.
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 );
sions 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()' func
tion.
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.
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.
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()' func
tion.
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()' func
tion.
localeconv
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.
log This is identical to Perl's builtin `log()' func
tion.
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;
year (`year') is given in years since 1900. I.e.
The year 1995 is 95; the year 2001 is 101. Con
sult 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 );
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.
$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 expres
sions 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 fol
lowing examples assume
use POSIX qw(setlocale LC_ALL LC_CTYPE);
has been issued.
The following will set the traditional UNIX system
locale behavior (the second argument `"C"').
$loc = setlocale( LC_ALL, "C" );
The following will query the current LC_CTYPE cat
egory. (No second argument means 'query'.)
$loc = setlocale( 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
llocale manpage.
$loc = setlocale( LC_CTYPE, "" );
The following will set the LC_COLLATE behaviour to
Argentinian Spanish. NOTE: The naming and avail
ability of locales depends on your operating sys
tem. Please consult the perllocale manpage for how
to find out which locales are available in your
system.
$loc = setlocale( 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' man
page 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
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 sys
tem's `sigsuspend' manpage for details.
Synopsis:
sigsuspend(signal_mask)
Returns `undef' on failure.
sin This is identical to Perl's builtin `sin()' func
tion.
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()' func
tion.
srand srand().
sscanf sscanf() is C-specific--use regular expressions
instead.
stat This is identical to Perl's builtin `stat()' func
tion.
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()'.
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 = -1, yday = -1, isdst = -1)
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. Con
sult your system's `strftime()' manpage for
details about these and the other arguments. If
you want your code to be portable, your format
(`fmt') argument should use only the conversion
specifiers defined by the ANSI C standard. These
are `aAbBcdHIjmMpSUwWxXyYZ%'. The given arguments
are made consistent as though by calling
`mktime()' before calling your system's `strf
time()' function, except that the `isdst' value is
not affected.
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.
function.
strtod String to double translation. Returns the parsed
number and the number of characters in the
unparsed portion of the string. Truly POSIX-com
pliant systems set $! ($ERRNO) to indicate a
translation error, so clear $! before calling str
tod. However, non-POSIX systems may not check for
overflow, and therefore will never set $!.
strtod should respect any POSIX setlocale() set
tings.
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-com
pliant systems set $! ($ERRNO) to indicate a
translation error, so clear $! before calling str
tol. However, non-POSIX systems may not check for
overflow, and therefore will never set $!.
strtol should respect any POSIX setlocale() set
tings.
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 str
tol will use the string itself to determine the
base: a leading "0x" or "0X" means hexadecimal; a
leading "0" means octal; any other leading
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.
$clock_ticks = POSIX::sysconf( &POSIX::_SC_CLK_TCK );
Returns `undef' on failure.
system This is identical to Perl's builtin `system()'
function.
tan This is identical to the C function `tan()'.
tanh This is identical to the C function `tanh()'.
tcdrain This is similar to the C function `tcdrain()'.
Returns `undef' on failure.
tcflow This is similar to the C function `tcflow()'.
Returns `undef' on failure.
tcflush This is similar to the C function `tcflush()'.
tcgetpgrp
This is identical to the C function `tcgetpgrp()'.
tcsendbreak
This is similar to the C function `tcsendbreak()'.
Returns `undef' on failure.
tcsetpgrp
This is similar to the C function `tcsetpgrp()'.
Returns `undef' on failure.
time This is identical to Perl's builtin `time()' func
tion.
times The times() function returns elapsed realtime
since some point in the past (such as system
startup), user and system times for this process,
and user and system times used by child processes.
All times are returned in clock ticks.
($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.
$tmpfile = POSIX::tmpnam();
tolower This is identical to Perl's builtin `lc()' func
tion.
toupper This is identical to Perl's builtin `uc()' func
tion.
ttyname This is identical to the C function `ttyname()'.
tzname Retrieves the time conversion information from the
`tzname' variable.
POSIX::tzset();
($std, $dst) = POSIX::tzname();
tzset This is identical to the C function `tzset()'.
function.
uname Get name of current operating system.
($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()' func
tion.
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.
CLASSES
POSIX::SigAction
new Creates a new `POSIX::SigAction' object which cor
responds to the C `struct sigaction'. This object
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.
POSIX::SigSet
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 sig
nals.
$sigset->fillset();
ismember
Tests the SigSet object to see if it contains a
specific signal.
if( $sigset->ismember( &POSIX::SIGUSR1 ) ){
print "contains SIGUSR1\n";
}
POSIX::Termios
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;
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;
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( $c_cflag | &POSIX::CLOCAL );
setiflag
Set the c_iflag field of a termios object.
$termios->setiflag( $c_iflag | &POSIX::BRKINT );
setispeed
Set the input baud rate.
Returns `undef' on failure.
setlflag
Set the c_lflag field of a termios object.
$termios->setlflag( $c_lflag | &POSIX::ECHO );
setoflag
Set the c_oflag field of a termios object.
$termios->setoflag( $c_oflag | &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
PATHNAME CONSTANTS
Constants
_PC_CHOWN_RESTRICTED _PC_LINK_MAX _PC_MAX_CANON
_PC_MAX_INPUT _PC_NAME_MAX _PC_NO_TRUNC
POSIX CONSTANTS
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_VDIS
ABLE _POSIX_VERSION
SYSTEM CONFIGURATION
Constants
_SC_ARG_MAX _SC_CHILD_MAX _SC_CLK_TCK _SC_JOB_CON
TROL _SC_NGROUPS_MAX _SC_OPEN_MAX _SC_SAVED_IDS
_SC_STREAM_MAX _SC_TZNAME_MAX _SC_VERSION
ERRNO
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 ENE
TRESET 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
FCNTL
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
FLOAT
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
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
LOCALE
Constants
LC_ALL LC_COLLATE LC_CTYPE LC_MONETARY LC_NUMERIC
LC_TIME
MATH
Constants
HUGE_VAL
SIGNAL
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
STAT
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
STDLIB
Constants
EXIT_FAILURE EXIT_SUCCESS MB_CUR_MAX RAND_MAX
STDIO
Constants
BUFSIZ EOF FILENAME_MAX L_ctermid L_cuserid L_tmp
name TMP_MAX
TIME
Constants
CLK_TCK CLOCKS_PER_SEC
UNISTD
Constants
R_OK SEEK_CUR SEEK_END SEEK_SET STDIN_FILENO STD
OUT_FILENO STRERR_FILENO W_OK X_OK
Constants
WNOHANG WUNTRACED
Macros WIFEXITED WEXITSTATUS WIFSIGNALED WTERMSIG WIF
STOPPED WSTOPSIG
CREATION
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