POSIX(3) POSIX(3)
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
Page 1
POSIX(3) POSIX(3)
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.
_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.
Page 2
POSIX(3) POSIX(3)
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.
Page 3
POSIX(3) POSIX(3)
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.
Page 4
POSIX(3) POSIX(3)
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 );
Page 5
POSIX(3) POSIX(3)
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.
Page 6
POSIX(3) POSIX(3)
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 de (Deutsch or German) locale.
Page 7
POSIX(3) POSIX(3)
$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.
Page 8
POSIX(3) POSIX(3)
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.
Page 9
POSIX(3) POSIX(3)
$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 );
Page 10
POSIX(3) POSIX(3)
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" );
Page 11
POSIX(3) POSIX(3)
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. 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" );
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)
Page 12
POSIX(3) POSIX(3)
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().
Page 13
POSIX(3) POSIX(3)
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 $!.
Page 14
POSIX(3) POSIX(3)
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.
Page 15
POSIX(3) POSIX(3)
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.
$clock_ticks = POSIX::sysconf( &POSIX::_SC_CLK_TCK );
Returns undef on failure.
system This is identical to Perl's builtin system() function.
tan This is identical to the C function tan().
tanh This is identical to the C function tanh().
tcdrain This is similar to the C function tcdrain().
Returns undef on failure.
tcflow This is similar to the C function tcflow().
Returns undef on failure.
tcflush This is similar to the C function tcflush().
Returns undef on failure.
tcgetpgrp
This is identical to the C function tcgetpgrp().
tcsendbreak
This is similar to the C function tcsendbreak().
Returns undef on failure.
tcsetpgrp
This is similar to the C function tcsetpgrp().
Returns undef on failure.
time This is identical to Perl's builtin time() function.
times The times() function returns elapsed realtime since some point in
the past (such as system startup), user and system times for this
process, and user and system times used by child processes. All
Page 16
POSIX(3) POSIX(3)
times are returned in clock ticks.
($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.
Page 17
POSIX(3) POSIX(3)
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.
POSIX::SigAction
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 fullyqualified
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.
Page 18
POSIX(3) POSIX(3)
$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";
}
POSIX::Termios
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.
Page 19
POSIX(3) POSIX(3)
$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 );
Page 20
POSIX(3) POSIX(3)
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
Page 21
POSIX(3) POSIX(3)
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
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
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
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
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
Page 22
POSIX(3) POSIX(3)
ESHUTDOWN ESOCKTNOSUPPORT ESPIPE ESRCH ESTALE ETIMEDOUT
ETOOMANYREFS ETXTBSY EUSERS EWOULDBLOCK EXDEV
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
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
Constants
LC_ALL LC_COLLATE LC_CTYPE LC_MONETARY LC_NUMERIC LC_TIME
Constants
HUGE_VAL
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
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
Page 23
POSIX(3) POSIX(3)
Constants
EXIT_FAILURE EXIT_SUCCESS MB_CUR_MAX RAND_MAX
Constants
BUFSIZ EOF FILENAME_MAX L_ctermid L_cuserid L_tmpname TMP_MAX
Constants
CLK_TCK CLOCKS_PER_SEC
Constants
R_OK SEEK_CUR SEEK_END SEEK_SET STDIN_FILENO STDOUT_FILENO
STRERR_FILENO W_OK X_OK
Constants
WNOHANG WUNTRACED
Macros WIFEXITED WEXITSTATUS WIFSIGNALED WTERMSIG WIFSTOPPED WSTOPSIG
This document generated by ./mkposixman.PL version 19960129.
Page 24
POSIX(3) POSIX(3)
PPPPaaaaggggeeee 22225555 [ Back ]
|
