centos man page for sigdelset

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)