тест на сигнал в наборе сигналов (test for a signal in a signal set)
Пролог (Prolog)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
Имя (Name)
sigismember — test for a signal in a signal set
Синопсис (Synopsis)
#include <signal.h>
int sigismember(const sigset_t *set, int signo);
Описание (Description)
The sigismember() function shall test whether the signal
specified by signo is a member of the set pointed to by set.
Applications should call either sigemptyset() or sigfillset() at
least once for each object of type sigset_t prior to any other
use of that object. If such an object is not initialized in this
way, but is nonetheless supplied as an argument to any of
pthread_sigmask(), sigaction(), sigaddset(), sigdelset(),
sigismember(), sigpending(), sigprocmask(), sigsuspend(),
sigtimedwait(), sigwait(), or sigwaitinfo(), the results are
undefined.
Возвращаемое значение (Return value)
Upon successful completion, sigismember() shall return 1 if the
specified signal is a member of the specified set, or 0 if it is
not. Otherwise, it shall return -1 and set errno to indicate the
error.
Ошибки (Error)
The sigismember() function may fail if:
EINVAL The signo argument is not a valid signal number, or is an
unsupported signal number.
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
Section 2.4, Signal Concepts, pthread_sigmask(3p), sigaction(3p),
sigaddset(3p), sigdelset(3p), sigfillset(3p), sigemptyset(3p),
sigpending(3p), sigsuspend(3p)
The Base Definitions volume of POSIX.1‐2017, signal.h(0p)
