plucky (3) sigaddset.3posix.gz

Provided by: manpages-posix-dev_2017a-2_all bug

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.


NAME
       sigaddset — add a signal to a signal set


SYNOPSIS
       #include <signal.h>

       int sigaddset(sigset_t *set, int signo);


DESCRIPTION
       The  sigaddset()  function adds the individual signal specified by the signo to the signal set pointed to
       by set.

       Applications shall 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
       Upon successful completion, sigaddset() shall return 0; otherwise, it shall return -1 and  set  errno  to
       indicate the error.


ERRORS
       The sigaddset() function may fail if:

       EINVAL The value of the signo argument is an invalid or unsupported signal number.

       The following sections are informative.


EXAMPLES
       None.


APPLICATION USAGE
       None.


RATIONALE
       None.


FUTURE DIRECTIONS
       None.


SEE ALSO
       Section  2.4,  Signal Concepts, pthread_sigmask(), sigaction(), sigdelset(), sigemptyset(), sigfillset(),
       sigismember(), sigpending(), sigsuspend()

       The Base Definitions volume of POSIX.1‐2017, <signal.h>


       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 .