sigaddset(3posix) [posix man page]

SIGADDSET(P)						     POSIX Programmer's Manual						      SIGADDSET(P)

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(),  sigac-
       tion(),	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

       Signal Concepts , sigaction() , sigdelset() , sigemptyset() , sigfillset() , sigismember() , sigpending() , sigprocmask() , sigsuspend()  ,
       the Base Definitions volume of IEEE Std 1003.1-2001, <signal.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 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 .

IEEE
/The Open Group						       2003							      SIGADDSET(P)

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

PROLOG

       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME

       sigdelset - delete a signal from a signal set

SYNOPSIS

       #include <signal.h>

       int sigdelset(sigset_t *set, int signo);

DESCRIPTION

       The sigdelset() function deletes the individual signal specified by signo from the signal 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(), sigac-
       tion(), sigaddset(), sigdelset(), sigismember(), sigpending(), sigprocmask(), sigsuspend(), sigtimedwait(),  sigwait(),	or  sigwaitinfo(),
       the results are undefined.

RETURN VALUE

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

ERRORS

       The sigdelset() 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

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       Signal  Concepts, sigaction(), sigaddset(), sigemptyset(), sigfillset(), sigismember(), sigpending(), sigprocmask(), sigsuspend(), the Base
       Definitions volume of IEEE Std 1003.1-2001, <signal.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 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 .

IEEE
/The Open Group						       2003							     SIGDELSET(3P)