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 corresponding
Linux manual page for details of Linux behavior), or the interface may
not be implemented on Linux.
NAMEsigdelset — 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 none‐
theless supplied as an argument to any of pthread_sigmask(), sigac‐
tion(), sigaddset(), sigdelset(), sigismember(), sigpending(), sigproc‐
mask(), 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 unsup‐
ported 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(),
sigaddset(), sigemptyset(), sigfillset(), sigismember(), sigpending(),
sigsuspend()
The Base Definitions volume of POSIX.1‐2008, <signal.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
cal and Electronics Engineers, Inc and The Open Group. (This is
POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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.unix.org/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.ker‐
nel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2013 SIGDELSET(3P)
