This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
eliminate an unused variable
[perl5.git] / ext / POSIX / lib / POSIX.pm
CommitLineData
a0d0e21e 1package POSIX;
e9b37efe
NC
2use strict;
3use warnings;
a0d0e21e 4
122efcc9 5our ($AUTOLOAD, %SIGRT);
73c78b0a 6
aad04297 7our $VERSION = '1.33';
d5a0d2f9 8
da4061d3 9require XSLoader;
a0d0e21e 10
33fb14dc
NC
11use Fcntl qw(FD_CLOEXEC F_DUPFD F_GETFD F_GETFL F_GETLK F_RDLCK F_SETFD
12 F_SETFL F_SETLK F_SETLKW F_UNLCK F_WRLCK O_ACCMODE O_APPEND
13 O_CREAT O_EXCL O_NOCTTY O_NONBLOCK O_RDONLY O_RDWR O_TRUNC
a5d75221 14 O_WRONLY SEEK_CUR SEEK_END SEEK_SET
9b68a132 15 S_ISBLK S_ISCHR S_ISDIR S_ISFIFO S_ISREG
a5d75221
NC
16 S_IRGRP S_IROTH S_IRUSR S_IRWXG S_IRWXO S_IRWXU S_ISGID S_ISUID
17 S_IWGRP S_IWOTH S_IWUSR S_IXGRP S_IXOTH S_IXUSR);
33fb14dc 18
66fbe9e2
GS
19my $loaded;
20
a0d0e21e 21sub import {
8fe37eed
AP
22 my $pkg = shift;
23
66fbe9e2 24 load_imports() unless $loaded++;
8fe37eed
AP
25
26 # Grandfather old foo_h form to new :foo_h form
27 s/^(?=\w+_h$)/:/ for my @list = @_;
28
a0d0e21e 29 local $Exporter::ExportLevel = 1;
8fe37eed 30 Exporter::import($pkg,@list);
a0d0e21e
LW
31}
32
66fbe9e2 33sub croak { require Carp; goto &Carp::croak }
122efcc9 34sub usage { croak "Usage: POSIX::$_[0]" }
4633a7c4 35
da4061d3 36XSLoader::load();
4633a7c4 37
8fe37eed
AP
38my %replacement = (
39 atexit => 'END {}',
40 atof => undef,
41 atoi => undef,
42 atol => undef,
43 bsearch => \'not supplied',
44 calloc => undef,
45 clearerr => 'IO::Handle::clearerr',
46 div => '/, % and int',
47 execl => undef,
48 execle => undef,
49 execlp => undef,
50 execv => undef,
51 execve => undef,
52 execvp => undef,
53 fclose => 'IO::Handle::close',
54 fdopen => 'IO::Handle::new_from_fd',
55 feof => 'IO::Handle::eof',
56 ferror => 'IO::Handle::error',
57 fflush => 'IO::Handle::flush',
58 fgetc => 'IO::Handle::getc',
59 fgetpos => 'IO::Seekable::getpos',
60 fgets => 'IO::Handle::gets',
61 fileno => 'IO::Handle::fileno',
62 fopen => 'IO::File::open',
63 fprintf => 'printf',
64 fputc => 'print',
65 fputs => 'print',
66 fread => 'read',
67 free => undef,
68 freopen => 'open',
69 fscanf => '<> and regular expressions',
70 fseek => 'IO::Seekable::seek',
71 fsetpos => 'IO::Seekable::setpos',
72 fsync => 'IO::Handle::sync',
73 ftell => 'IO::Seekable::tell',
74 fwrite => 'print',
75 labs => 'abs',
76 ldiv => '/, % and int',
77 longjmp => 'die',
78 malloc => undef,
79 memchr => 'index()',
80 memcmp => 'eq',
81 memcpy => '=',
82 memmove => '=',
83 memset => 'x',
84 offsetof => undef,
85 putc => 'print',
86 putchar => 'print',
87 puts => 'print',
88 qsort => 'sort',
89 rand => \'non-portable, use Perl\'s rand instead',
90 realloc => undef,
91 scanf => '<> and regular expressions',
92 setbuf => 'IO::Handle::setbuf',
93 setjmp => 'eval {}',
94 setvbuf => 'IO::Handle::setvbuf',
95 siglongjmp => 'die',
96 sigsetjmp => 'eval {}',
96927498 97 srand => \'not supplied; refer to Perl\'s srand documentation',
8fe37eed
AP
98 sscanf => 'regular expressions',
99 strcat => '.=',
100 strchr => 'index()',
101 strcmp => 'eq',
102 strcpy => '=',
103 strcspn => 'regular expressions',
104 strlen => 'length',
105 strncat => '.=',
106 strncmp => 'eq',
107 strncpy => '=',
108 strpbrk => undef,
109 strrchr => 'rindex()',
110 strspn => undef,
111 strtok => undef,
112 tmpfile => 'IO::File::new_tmpfile',
113 ungetc => 'IO::Handle::ungetc',
114 vfprintf => undef,
115 vprintf => undef,
116 vsprintf => undef,
117);
118
122efcc9
AP
119my %reimpl = (
120 assert => 'expr => croak "Assertion failed" if !$_[0]',
121 tolower => 'string => lc($_[0])',
122 toupper => 'string => uc($_[0])',
123 closedir => 'dirhandle => CORE::closedir($_[0])',
124 opendir => 'directory => my $dh; CORE::opendir($dh, $_[0]) ? $dh : undef',
125 readdir => 'dirhandle => CORE::readdir($_[0])',
126 rewinddir => 'dirhandle => CORE::rewinddir($_[0])',
127 errno => '$! + 0',
128 creat => 'filename, mode => &open($_[0], &O_WRONLY | &O_CREAT | &O_TRUNC, $_[1])',
129 fcntl => 'filehandle, cmd, arg => CORE::fcntl($_[0], $_[1], $_[2])',
130 getgrgid => 'gid => CORE::getgrgid($_[0])',
131 getgrnam => 'name => CORE::getgrnam($_[0])',
132 atan2 => 'x, y => CORE::atan2($_[0], $_[1])',
133 cos => 'x => CORE::cos($_[0])',
134 exp => 'x => CORE::exp($_[0])',
135 fabs => 'x => CORE::abs($_[0])',
136 log => 'x => CORE::log($_[0])',
137 pow => 'x, exponent => $_[0] ** $_[1]',
138 sin => 'x => CORE::sin($_[0])',
139 sqrt => 'x => CORE::sqrt($_[0])',
140 getpwnam => 'name => CORE::getpwnam($_[0])',
141 getpwuid => 'uid => CORE::getpwuid($_[0])',
142 kill => 'pid, sig => CORE::kill $_[1], $_[0]',
143 raise => 'sig => CORE::kill $_[0], $$; # Is this good enough',
144 getc => 'handle => CORE::getc($_[0])',
145 getchar => 'CORE::getc(STDIN)',
146 gets => 'scalar <STDIN>',
147 remove => 'filename => (-d $_[0]) ? CORE::rmdir($_[0]) : CORE::unlink($_[0])',
148 rename => 'oldfilename, newfilename => CORE::rename($_[0], $_[1])',
149 rewind => 'filehandle => CORE::seek($_[0],0,0)',
150 abs => 'x => CORE::abs($_[0])',
151 exit => 'status => CORE::exit($_[0])',
152 getenv => 'name => $ENV{$_[0]}',
153 system => 'command => CORE::system($_[0])',
154 strerror => 'errno => local $! = $_[0]; "$!"',
155 strstr => 'big, little => CORE::index($_[0], $_[1])',
156 chmod => 'mode, filename => CORE::chmod($_[0], $_[1])',
157 fstat => 'fd => CORE::open my $dup, "<&", $_[0]; CORE::stat($dup)', # Gross.
158 mkdir => 'directoryname, mode => CORE::mkdir($_[0], $_[1])',
159 stat => 'filename => CORE::stat($_[0])',
160 umask => 'mask => CORE::umask($_[0])',
161 wait => 'CORE::wait()',
162 waitpid => 'pid, options => CORE::waitpid($_[0], $_[1])',
163 gmtime => 'time => CORE::gmtime($_[0])',
164 localtime => 'time => CORE::localtime($_[0])',
165 time => 'CORE::time',
166 alarm => 'seconds => CORE::alarm($_[0])',
167 chdir => 'directory => CORE::chdir($_[0])',
168 chown => 'uid, gid, filename => CORE::chown($_[0], $_[1], $_[2])',
169 fork => 'CORE::fork',
170 getegid => '$) + 0',
171 geteuid => '$> + 0',
172 getgid => '$( + 0',
173 getgroups => 'my %seen; grep !$seen{$_}++, split " ", $)',
174 getlogin => 'CORE::getlogin()',
175 getpgrp => 'CORE::getpgrp',
176 getpid => '$$',
177 getppid => 'CORE::getppid',
178 getuid => '$<',
179 isatty => 'filehandle => -t $_[0]',
180 link => 'oldfilename, newfilename => CORE::link($_[0], $_[1])',
181 rmdir => 'directoryname => CORE::rmdir($_[0])',
122efcc9
AP
182 unlink => 'filename => CORE::unlink($_[0])',
183 utime => 'filename, atime, mtime => CORE::utime($_[1], $_[2], $_[0])',
184);
8fe37eed 185
122efcc9 186eval join ';', map "sub $_", keys %replacement, keys %reimpl;
8fe37eed 187
122efcc9 188sub AUTOLOAD {
8fe37eed
AP
189 my ($func) = ($AUTOLOAD =~ /.*::(.*)/);
190
8dad66f8 191 if (my $code = $reimpl{$func}) {
122efcc9
AP
192 my ($num, $arg) = (0, '');
193 if ($code =~ s/^(.*?) *=> *//) {
194 $arg = $1;
195 $num = 1 + $arg =~ tr/,//;
196 }
197 # no warnings to be consistent with the old implementation, where each
198 # function was in its own little AutoSplit world:
199 eval qq{ sub $func {
200 no warnings;
201 usage "$func($arg)" if \@_ != $num;
202 $code
203 } };
204 no strict;
205 goto &$AUTOLOAD;
206 }
8fe37eed
AP
207 if (exists $replacement{$func}) {
208 my $how = $replacement{$func};
209 croak "Unimplemented: POSIX::$func() is C-specific, stopped"
210 unless defined $how;
211 croak "Unimplemented: POSIX::$func() is $$how" if ref $how;
11e7c26f 212 croak "Use method $how() instead of POSIX::$func()" if $how =~ /::/;
96927498 213 croak "Unimplemented: POSIX::$func() is C-specific: use $how instead";
8fe37eed
AP
214 }
215
8fe37eed 216 constant($func);
a0d0e21e
LW
217}
218
a0d0e21e
LW
219sub perror {
220 print STDERR "@_: " if @_;
221 print STDERR $!,"\n";
222}
223
224sub printf {
225 usage "printf(pattern, args...)" if @_ < 1;
b56ec344 226 CORE::printf STDOUT @_;
a0d0e21e
LW
227}
228
a0d0e21e 229sub sprintf {
c43a6b96 230 usage "sprintf(pattern, args...)" if @_ == 0;
b56ec344 231 CORE::sprintf(shift,@_);
a0d0e21e
LW
232}
233
66fbe9e2 234sub load_imports {
b0ac411b 235our %EXPORT_TAGS = (
66fbe9e2
GS
236
237 assert_h => [qw(assert NDEBUG)],
238
239 ctype_h => [qw(isalnum isalpha iscntrl isdigit isgraph islower
240 isprint ispunct isspace isupper isxdigit tolower toupper)],
241
d4742b2c 242 dirent_h => [],
66fbe9e2
GS
243
244 errno_h => [qw(E2BIG EACCES EADDRINUSE EADDRNOTAVAIL EAFNOSUPPORT
245 EAGAIN EALREADY EBADF EBUSY ECHILD ECONNABORTED
246 ECONNREFUSED ECONNRESET EDEADLK EDESTADDRREQ EDOM EDQUOT
247 EEXIST EFAULT EFBIG EHOSTDOWN EHOSTUNREACH EINPROGRESS
248 EINTR EINVAL EIO EISCONN EISDIR ELOOP EMFILE EMLINK
249 EMSGSIZE ENAMETOOLONG ENETDOWN ENETRESET ENETUNREACH
250 ENFILE ENOBUFS ENODEV ENOENT ENOEXEC ENOLCK ENOMEM
251 ENOPROTOOPT ENOSPC ENOSYS ENOTBLK ENOTCONN ENOTDIR
252 ENOTEMPTY ENOTSOCK ENOTTY ENXIO EOPNOTSUPP EPERM
253 EPFNOSUPPORT EPIPE EPROCLIM EPROTONOSUPPORT EPROTOTYPE
254 ERANGE EREMOTE ERESTART EROFS ESHUTDOWN ESOCKTNOSUPPORT
255 ESPIPE ESRCH ESTALE ETIMEDOUT ETOOMANYREFS ETXTBSY
256 EUSERS EWOULDBLOCK EXDEV errno)],
257
258 fcntl_h => [qw(FD_CLOEXEC F_DUPFD F_GETFD F_GETFL F_GETLK F_RDLCK
259 F_SETFD F_SETFL F_SETLK F_SETLKW F_UNLCK F_WRLCK
260 O_ACCMODE O_APPEND O_CREAT O_EXCL O_NOCTTY O_NONBLOCK
261 O_RDONLY O_RDWR O_TRUNC O_WRONLY
262 creat
263 SEEK_CUR SEEK_END SEEK_SET
264 S_IRGRP S_IROTH S_IRUSR S_IRWXG S_IRWXO S_IRWXU
265 S_ISBLK S_ISCHR S_ISDIR S_ISFIFO S_ISGID S_ISREG S_ISUID
266 S_IWGRP S_IWOTH S_IWUSR)],
267
268 float_h => [qw(DBL_DIG DBL_EPSILON DBL_MANT_DIG
269 DBL_MAX DBL_MAX_10_EXP DBL_MAX_EXP
270 DBL_MIN DBL_MIN_10_EXP DBL_MIN_EXP
271 FLT_DIG FLT_EPSILON FLT_MANT_DIG
272 FLT_MAX FLT_MAX_10_EXP FLT_MAX_EXP
273 FLT_MIN FLT_MIN_10_EXP FLT_MIN_EXP
274 FLT_RADIX FLT_ROUNDS
275 LDBL_DIG LDBL_EPSILON LDBL_MANT_DIG
276 LDBL_MAX LDBL_MAX_10_EXP LDBL_MAX_EXP
277 LDBL_MIN LDBL_MIN_10_EXP LDBL_MIN_EXP)],
278
d4742b2c 279 grp_h => [],
66fbe9e2
GS
280
281 limits_h => [qw( ARG_MAX CHAR_BIT CHAR_MAX CHAR_MIN CHILD_MAX
282 INT_MAX INT_MIN LINK_MAX LONG_MAX LONG_MIN MAX_CANON
283 MAX_INPUT MB_LEN_MAX NAME_MAX NGROUPS_MAX OPEN_MAX
284 PATH_MAX PIPE_BUF SCHAR_MAX SCHAR_MIN SHRT_MAX SHRT_MIN
285 SSIZE_MAX STREAM_MAX TZNAME_MAX UCHAR_MAX UINT_MAX
286 ULONG_MAX USHRT_MAX _POSIX_ARG_MAX _POSIX_CHILD_MAX
287 _POSIX_LINK_MAX _POSIX_MAX_CANON _POSIX_MAX_INPUT
288 _POSIX_NAME_MAX _POSIX_NGROUPS_MAX _POSIX_OPEN_MAX
289 _POSIX_PATH_MAX _POSIX_PIPE_BUF _POSIX_SSIZE_MAX
290 _POSIX_STREAM_MAX _POSIX_TZNAME_MAX)],
291
83f427f7
JH
292 locale_h => [qw(LC_ALL LC_COLLATE LC_CTYPE LC_MESSAGES
293 LC_MONETARY LC_NUMERIC LC_TIME NULL
294 localeconv setlocale)],
66fbe9e2
GS
295
296 math_h => [qw(HUGE_VAL acos asin atan ceil cosh fabs floor fmod
297 frexp ldexp log10 modf pow sinh tan tanh)],
298
d4742b2c 299 pwd_h => [],
66fbe9e2
GS
300
301 setjmp_h => [qw(longjmp setjmp siglongjmp sigsetjmp)],
302
303 signal_h => [qw(SA_NOCLDSTOP SA_NOCLDWAIT SA_NODEFER SA_ONSTACK
304 SA_RESETHAND SA_RESTART SA_SIGINFO SIGABRT SIGALRM
305 SIGCHLD SIGCONT SIGFPE SIGHUP SIGILL SIGINT SIGKILL
3609ea0d 306 SIGPIPE %SIGRT SIGRTMIN SIGRTMAX SIGQUIT SIGSEGV SIGSTOP
ee25ad77
FR
307 SIGTERM SIGTSTP SIGTTIN SIGTTOU SIGUSR1 SIGUSR2 SIGBUS
308 SIGPOLL SIGPROF SIGSYS SIGTRAP SIGURG SIGVTALRM SIGXCPU SIGXFSZ
3609ea0d
JH
309 SIG_BLOCK SIG_DFL SIG_ERR SIG_IGN SIG_SETMASK SIG_UNBLOCK
310 raise sigaction signal sigpending sigprocmask sigsuspend)],
66fbe9e2 311
d4742b2c 312 stdarg_h => [],
66fbe9e2
GS
313
314 stddef_h => [qw(NULL offsetof)],
315
316 stdio_h => [qw(BUFSIZ EOF FILENAME_MAX L_ctermid L_cuserid
317 L_tmpname NULL SEEK_CUR SEEK_END SEEK_SET
318 STREAM_MAX TMP_MAX stderr stdin stdout
319 clearerr fclose fdopen feof ferror fflush fgetc fgetpos
320 fgets fopen fprintf fputc fputs fread freopen
321 fscanf fseek fsetpos ftell fwrite getchar gets
322 perror putc putchar puts remove rewind
323 scanf setbuf setvbuf sscanf tmpfile tmpnam
324 ungetc vfprintf vprintf vsprintf)],
325
326 stdlib_h => [qw(EXIT_FAILURE EXIT_SUCCESS MB_CUR_MAX NULL RAND_MAX
327 abort atexit atof atoi atol bsearch calloc div
328 free getenv labs ldiv malloc mblen mbstowcs mbtowc
329 qsort realloc strtod strtol strtoul wcstombs wctomb)],
330
331 string_h => [qw(NULL memchr memcmp memcpy memmove memset strcat
332 strchr strcmp strcoll strcpy strcspn strerror strlen
333 strncat strncmp strncpy strpbrk strrchr strspn strstr
334 strtok strxfrm)],
335
336 sys_stat_h => [qw(S_IRGRP S_IROTH S_IRUSR S_IRWXG S_IRWXO S_IRWXU
337 S_ISBLK S_ISCHR S_ISDIR S_ISFIFO S_ISGID S_ISREG
338 S_ISUID S_IWGRP S_IWOTH S_IWUSR S_IXGRP S_IXOTH S_IXUSR
339 fstat mkfifo)],
340
d4742b2c 341 sys_times_h => [],
66fbe9e2 342
d4742b2c 343 sys_types_h => [],
66fbe9e2
GS
344
345 sys_utsname_h => [qw(uname)],
346
347 sys_wait_h => [qw(WEXITSTATUS WIFEXITED WIFSIGNALED WIFSTOPPED
348 WNOHANG WSTOPSIG WTERMSIG WUNTRACED)],
349
350 termios_h => [qw( B0 B110 B1200 B134 B150 B1800 B19200 B200 B2400
351 B300 B38400 B4800 B50 B600 B75 B9600 BRKINT CLOCAL
352 CREAD CS5 CS6 CS7 CS8 CSIZE CSTOPB ECHO ECHOE ECHOK
353 ECHONL HUPCL ICANON ICRNL IEXTEN IGNBRK IGNCR IGNPAR
354 INLCR INPCK ISIG ISTRIP IXOFF IXON NCCS NOFLSH OPOST
355 PARENB PARMRK PARODD TCIFLUSH TCIOFF TCIOFLUSH TCION
356 TCOFLUSH TCOOFF TCOON TCSADRAIN TCSAFLUSH TCSANOW
357 TOSTOP VEOF VEOL VERASE VINTR VKILL VMIN VQUIT VSTART
358 VSTOP VSUSP VTIME
359 cfgetispeed cfgetospeed cfsetispeed cfsetospeed tcdrain
360 tcflow tcflush tcgetattr tcsendbreak tcsetattr )],
361
362 time_h => [qw(CLK_TCK CLOCKS_PER_SEC NULL asctime clock ctime
ce0afe25 363 difftime mktime strftime tzset tzname)],
66fbe9e2
GS
364
365 unistd_h => [qw(F_OK NULL R_OK SEEK_CUR SEEK_END SEEK_SET
b250498f 366 STDERR_FILENO STDIN_FILENO STDOUT_FILENO W_OK X_OK
66fbe9e2
GS
367 _PC_CHOWN_RESTRICTED _PC_LINK_MAX _PC_MAX_CANON
368 _PC_MAX_INPUT _PC_NAME_MAX _PC_NO_TRUNC _PC_PATH_MAX
369 _PC_PIPE_BUF _PC_VDISABLE _POSIX_CHOWN_RESTRICTED
370 _POSIX_JOB_CONTROL _POSIX_NO_TRUNC _POSIX_SAVED_IDS
371 _POSIX_VDISABLE _POSIX_VERSION _SC_ARG_MAX
372 _SC_CHILD_MAX _SC_CLK_TCK _SC_JOB_CONTROL
d61b6859 373 _SC_NGROUPS_MAX _SC_OPEN_MAX _SC_PAGESIZE _SC_SAVED_IDS
66fbe9e2
GS
374 _SC_STREAM_MAX _SC_TZNAME_MAX _SC_VERSION
375 _exit access ctermid cuserid
376 dup2 dup execl execle execlp execv execve execvp
f0709b24 377 fpathconf fsync getcwd getegid geteuid getgid getgroups
66fbe9e2
GS
378 getpid getuid isatty lseek pathconf pause setgid setpgid
379 setsid setuid sysconf tcgetpgrp tcsetpgrp ttyname)],
380
d4742b2c 381 utime_h => [],
66fbe9e2
GS
382);
383
384# Exporter::export_tags();
85a5de57
NC
385{
386 # De-duplicate the export list:
a146a244
NC
387 my %export;
388 @export{map {@$_} values %EXPORT_TAGS} = ();
ce0afe25
AB
389 # Doing the de-dup with a temporary hash has the advantage that the SVs in
390 # @EXPORT are actually shared hash key scalars, which will save some memory.
391 our @EXPORT = keys %export;
66fbe9e2 392
a387c53a 393 our @EXPORT_OK = (qw(close lchown nice open pipe read sleep times write
8dad66f8
NC
394 printf sprintf),
395 grep {!exists $export{$_}} keys %reimpl, keys %replacement);
396}
66fbe9e2
GS
397
398require Exporter;
399}
557c0de7
BD
400
401package POSIX::SigAction;
402
fc8b6fe2 403sub new { bless {HANDLER => $_[1], MASK => $_[2], FLAGS => $_[3] || 0, SAFE => 0}, $_[0] }
557c0de7
BD
404sub handler { $_[0]->{HANDLER} = $_[1] if @_ > 1; $_[0]->{HANDLER} };
405sub mask { $_[0]->{MASK} = $_[1] if @_ > 1; $_[0]->{MASK} };
406sub flags { $_[0]->{FLAGS} = $_[1] if @_ > 1; $_[0]->{FLAGS} };
d36b6582 407sub safe { $_[0]->{SAFE} = $_[1] if @_ > 1; $_[0]->{SAFE} };
3609ea0d 408
0e9a7888
RS
409{
410package POSIX::SigSet;
411# This package is here entirely to make sure that POSIX::SigSet is seen by the
412# PAUSE indexer, so that it will always be clearly indexed in core. This is to
413# prevent the accidental case where a third-party distribution can accidentally
414# claim the POSIX::SigSet package, as occurred in 2011-12. -- rjbs, 2011-12-30
415}
416
983cc415
NC
417package POSIX::SigRt;
418
122efcc9
AP
419require Tie::Hash;
420
421our @ISA = 'Tie::StdHash';
422
423our ($_SIGRTMIN, $_SIGRTMAX, $_sigrtn);
424
425our $SIGACTION_FLAGS = 0;
426
983cc415
NC
427sub _init {
428 $_SIGRTMIN = &POSIX::SIGRTMIN;
429 $_SIGRTMAX = &POSIX::SIGRTMAX;
430 $_sigrtn = $_SIGRTMAX - $_SIGRTMIN;
431}
432
433sub _croak {
434 &_init unless defined $_sigrtn;
435 die "POSIX::SigRt not available" unless defined $_sigrtn && $_sigrtn > 0;
436}
437
438sub _getsig {
439 &_croak;
440 my $rtsig = $_[0];
441 # Allow (SIGRT)?MIN( + n)?, a common idiom when doing these things in C.
442 $rtsig = $_SIGRTMIN + ($1 || 0)
443 if $rtsig =~ /^(?:(?:SIG)?RT)?MIN(\s*\+\s*(\d+))?$/;
444 return $rtsig;
445}
446
447sub _exist {
448 my $rtsig = _getsig($_[1]);
449 my $ok = $rtsig >= $_SIGRTMIN && $rtsig <= $_SIGRTMAX;
450 ($rtsig, $ok);
451}
452
453sub _check {
454 my ($rtsig, $ok) = &_exist;
455 die "No POSIX::SigRt signal $_[1] (valid range SIGRTMIN..SIGRTMAX, or $_SIGRTMIN..$_SIGRTMAX)"
456 unless $ok;
457 return $rtsig;
458}
459
460sub new {
461 my ($rtsig, $handler, $flags) = @_;
462 my $sigset = POSIX::SigSet->new($rtsig);
b0ac411b 463 my $sigact = POSIX::SigAction->new($handler, $sigset, $flags);
983cc415
NC
464 POSIX::sigaction($rtsig, $sigact);
465}
466
467sub EXISTS { &_exist }
468sub FETCH { my $rtsig = &_check;
469 my $oa = POSIX::SigAction->new();
470 POSIX::sigaction($rtsig, undef, $oa);
471 return $oa->{HANDLER} }
472sub STORE { my $rtsig = &_check; new($rtsig, $_[2], $SIGACTION_FLAGS) }
473sub DELETE { delete $SIG{ &_check } }
474sub CLEAR { &_exist; delete @SIG{ &POSIX::SIGRTMIN .. &POSIX::SIGRTMAX } }
475sub SCALAR { &_croak; $_sigrtn + 1 }
122efcc9
AP
476
477tie %POSIX::SIGRT, 'POSIX::SigRt';
478# and the expression on the line above is true, so we return true.