sigismember(3p) — Linux manual page

SIGISMEMBER(3P)         POSIX Programmer's Manual        SIGISMEMBER(3P)

PROLOG         top

       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.

NAME         top

       sigismember — test for a signal in a signal set

SYNOPSIS         top

       #include <signal.h>

       int sigismember(const sigset_t *set, int signo);

DESCRIPTION         top

       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.

RETURN VALUE         top

       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.

ERRORS         top

       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.

EXAMPLES         top

       None.

APPLICATION USAGE         top

       None.

RATIONALE         top

       None.

FUTURE DIRECTIONS         top

       None.

SEE ALSO         top

       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)

COPYRIGHT         top

       Portions of this text are reprinted and reproduced in electronic
       form from IEEE Std 1003.1-2017, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The
       Open Group Base Specifications Issue 7, 2018 Edition, Copyright
       (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  In the event of any
       discrepancy between this version and the original IEEE and The
       Open Group Standard, the original IEEE and The Open Group
       Standard is the referee document. The original Standard can be
       obtained online at http://www.opengroup.org/unix/online.html .

       Any typographical or formatting errors that appear in this page
       are most likely to have been introduced during the conversion of
       the source files to man page format. To report such errors, see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group               2017                   SIGISMEMBER(3P)

Pages that refer to this page: signal.h(0p),  pthread_sigmask(3p),  sigaction(3p),  sigaddset(3p),  sigdelset(3p),  sigemptyset(3p),  sigfillset(3p),  sigpending(3p)

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