| … | |
… | |
| 2409 | truncated. |
2409 | truncated. |
| 2410 | |
2410 | |
| 2411 | To accept name-less sockets, use C<undef> for C<$sockaddr> and C<0> for |
2411 | To accept name-less sockets, use C<undef> for C<$sockaddr> and C<0> for |
| 2412 | C<$sockaddr_maxlen>. |
2412 | C<$sockaddr_maxlen>. |
| 2413 | |
2413 | |
| 2414 | The main reasons to use this syscall rather than portable C«accept(2)> |
2414 | The main reasons to use this syscall rather than portable C<accept(2)> |
| 2415 | are that you can specify C<SOCK_NONBLOCK> and/or C<SOCK_CLOEXEC> |
2415 | are that you can specify C<SOCK_NONBLOCK> and/or C<SOCK_CLOEXEC> |
| 2416 | flags and you can accept name-less sockets by specifying C<0> for |
2416 | flags and you can accept name-less sockets by specifying C<0> for |
| 2417 | C<$sockaddr_maxlen>, which is sadly not possible with perl's interface to |
2417 | C<$sockaddr_maxlen>, which is sadly not possible with perl's interface to |
| 2418 | C<accept>. |
2418 | C<accept>. |
| 2419 | |
2419 | |
| … | |
… | |
| 2484 | C<IO::AIO::MFD_ALLOW_SEALING> and C<IO::AIO::MFD_HUGETLB>. |
2484 | C<IO::AIO::MFD_ALLOW_SEALING> and C<IO::AIO::MFD_HUGETLB>. |
| 2485 | |
2485 | |
| 2486 | Example: create a new memfd. |
2486 | Example: create a new memfd. |
| 2487 | |
2487 | |
| 2488 | my $fh = IO::AIO::memfd_create "somenameforprocfd", IO::AIO::MFD_CLOEXEC |
2488 | my $fh = IO::AIO::memfd_create "somenameforprocfd", IO::AIO::MFD_CLOEXEC |
| 2489 | or die "m,emfd_create: $!\n"; |
2489 | or die "memfd_create: $!\n"; |
|
|
2490 | |
|
|
2491 | =item $fh = IO::AIO::pidfd_open $pid[, $flags] |
|
|
2492 | |
|
|
2493 | This is an interface to the Linux L<pidfd_open(2)> system call. The |
|
|
2494 | default for C<$flags> is C<0>. |
|
|
2495 | |
|
|
2496 | On success, a new pidfd filehandle is returned (that is already set to |
|
|
2497 | close-on-exec), otherwise returns C<undef>. If the syscall is missing, |
|
|
2498 | fails with C<ENOSYS>. |
|
|
2499 | |
|
|
2500 | Example: open pid 6341 as pidfd. |
|
|
2501 | |
|
|
2502 | my $fh = IO::AIO::pidfd_open 6341 |
|
|
2503 | or die "pidfd_open: $!\n"; |
|
|
2504 | |
|
|
2505 | =item $status = IO::AIO::pidfd_send_signal $pidfh, $signal[, $siginfo[, $flags]] |
|
|
2506 | |
|
|
2507 | This is an interface to the Linux L<pidfd_send_signal> system call. The |
|
|
2508 | default for C<$siginfo> is C<undef> and the default for C<$flags> is C<0>. |
|
|
2509 | |
|
|
2510 | Returns the system call status. If the syscall is missing, fails with |
|
|
2511 | C<ENOSYS>. |
|
|
2512 | |
|
|
2513 | When specified, C<$siginfo> must be a reference to a hash with one or more |
|
|
2514 | of the following members: |
|
|
2515 | |
|
|
2516 | =over |
|
|
2517 | |
|
|
2518 | =item code - the C<si_code> member |
|
|
2519 | |
|
|
2520 | =item pid - the C<si_pid> member |
|
|
2521 | |
|
|
2522 | =item uid - the C<si_uid> member |
|
|
2523 | |
|
|
2524 | =item value_int - the C<si_value.sival_int> member |
|
|
2525 | |
|
|
2526 | =item value_ptr - the C<si_value.sival_ptr> member, specified as an integer |
|
|
2527 | |
|
|
2528 | =back |
|
|
2529 | |
|
|
2530 | Example: send a SIGKILL to the specified process. |
|
|
2531 | |
|
|
2532 | my $status = IO::AIO::pidfd_send_signal $pidfh, 9, undef |
|
|
2533 | and die "pidfd_send_signal: $!\n"; |
|
|
2534 | |
|
|
2535 | Example: send a SIGKILL to the specified process with extra data. |
|
|
2536 | |
|
|
2537 | my $status = IO::AIO::pidfd_send_signal $pidfh, 9, { code => -1, value_int => 7 } |
|
|
2538 | and die "pidfd_send_signal: $!\n"; |
|
|
2539 | |
|
|
2540 | =item $fh = IO::AIO::pidfd_getfd $pidfh, $targetfd[, $flags] |
|
|
2541 | |
|
|
2542 | This is an interface to the Linux L<pidfd_getfd> system call. The default |
|
|
2543 | for C<$flags> is C<0>. |
|
|
2544 | |
|
|
2545 | On success, returns a dup'ed copy of the target file descriptor (specified |
|
|
2546 | as an integer) returned (that is already set to close-on-exec), otherwise |
|
|
2547 | returns C<undef>. If the syscall is missing, fails with C<ENOSYS>. |
|
|
2548 | |
|
|
2549 | Example: get a copy of standard error of another process and print soemthing to it. |
|
|
2550 | |
|
|
2551 | my $errfh = IO::AIO::pidfd_getfd $pidfh, 2 |
|
|
2552 | or die "pidfd_getfd: $!\n"; |
|
|
2553 | print $errfh "stderr\n"; |
|
|
2554 | |
| 2490 | =item $fh = IO::AIO::eventfd [$initval, [$flags]] |
2555 | =item $fh = IO::AIO::eventfd [$initval, [$flags]] |
| 2491 | |
2556 | |
| 2492 | This is a direct interface to the Linux L<eventfd(2)> system call. The |
2557 | This is a direct interface to the Linux L<eventfd(2)> system call. The |
| 2493 | (unhelpful) defaults for C<$initval> and C<$flags> are C<0> for both. |
2558 | (unhelpful) defaults for C<$initval> and C<$flags> are C<0> for both. |
| 2494 | |
2559 | |
