bsd_signal(3) — Справочная страница Linux

bsd_signal(3)           Library Functions Manual           bsd_signal(3)

ИМЯ

       bsd_signal - signal handling with BSD semantics

БИБЛИОТЕКА

       Standard C library (libc, -lc)

СИНТАКСИС

       #include <signal.h>

       typedef void (*sighandler_t)(int);

       sighandler_t bsd_signal(int signum, sighandler_t handler);

   Feature Test Macro Requirements for glibc (see
   feature_test_macros(7)):

       bsd_signal():
           Since glibc 2.26:
               _XOPEN_SOURCE >= 500
                   && ! (_POSIX_C_SOURCE >= 200809L)
           glibc 2.25 and earlier:
               _XOPEN_SOURCE

ОПИСАНИЕ

       The bsd_signal() function takes the same arguments, and performs
       the same task, as signal(2).

       The difference between the two is that bsd_signal() is guaranteed
       to provide reliable signal semantics, that is: a) the disposition
       of the signal is not reset to the default when the handler is
       invoked; b) delivery of further instances of the signal is
       blocked while the signal handler is executing; and c) if the
       handler interrupts a blocking system call, then the system call
       is automatically restarted.  A portable application cannot rely
       on signal(2) to provide these guarantees.

ЗНАЧЕНИЕ, ВОЗВРАЩАЕМОЕ ФУНКЦИЕЙ

       The bsd_signal() function returns the previous value of the
       signal handler, or SIG_ERR on error.

ОШИБКИ

       As for signal(2).

АТРИБУТЫ

       For an explanation of the terms used in this section, see
       attributes(7).
       ┌─────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                           │ Attribute     │ Value   │
       ├─────────────────────────────────────┼───────────────┼─────────┤
       │ bsd_signal()                        │ Thread safety │ MT-Safe │
       └─────────────────────────────────────┴───────────────┴─────────┘

ВЕРСИИ

       Use of bsd_signal() should be avoided; use sigaction(2) instead.

       On modern Linux systems, bsd_signal() and signal(2) are
       equivalent.  But on older systems, signal(2) provided unreliable
       signal semantics; see signal(2) for details.

       The use of sighandler_t is a GNU extension; this type is defined
       only if the _GNU_SOURCE feature test macro is defined.

СТАНДАРТЫ

       None.

ИСТОРИЯ

       4.2BSD, POSIX.1-2001.  Removed in POSIX.1-2008, recommending the
       use of sigaction(2) instead.

СМОТРИТЕ ТАКЖЕ

       sigaction(2), signal(2), sysv_signal(3), signal(7)

КОЛОФОН

       This page is part of the man-pages (Linux kernel and C library
       user-space interface documentation) project.  Information about
       the project can be found at 
       ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report
       for this manual page, see
       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
       This page was obtained from the tarball man-pages-6.9.1.tar.gz
       fetched from
       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
       2024-06-26.  If you discover any rendering problems in this HTML
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       man-pages@man7.org

Linux man-pages 6.9.1          2024-05-02                  bsd_signal(3)

Страницы, которые ссылаются на эту страницу: signal(2), sysv_signal(3), signal(7)