SIGINTERRUPT
Section: POSIX Programmer's Manual (3P)
Updated: 2017
Page Index
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
siginterrupt
--- allow signals to interrupt functions
SYNOPSIS
#include <signal.h>
int siginterrupt(int sig, int flag);
DESCRIPTION
The
siginterrupt()
function shall change the restart behavior when a function is
interrupted by the specified signal. The function
siginterrupt(
sig,
flag) has an effect as if
implemented as:
-
int siginterrupt(int sig, int flag) {
int ret;
struct sigaction act;
(void) sigaction(sig, NULL, &act);
if (flag)
act.sa_flags &= ~SA_RESTART;
else
act.sa_flags |= SA_RESTART;
ret = sigaction(sig, &act, NULL);
return ret;
}
RETURN VALUE
Upon successful completion,
siginterrupt()
shall return 0; otherwise, -1 shall be returned and
errno
set to indicate the error.
ERRORS
The
siginterrupt()
function shall fail if:
- EINVAL
-
The
sig
argument is not a valid signal number.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
The
siginterrupt()
function supports programs written to historical system interfaces.
Applications should use the
sigaction()
with the SA_RESTART flag instead of the obsolescent
siginterrupt()
function.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
Section 2.4,
Signal Concepts,
sigaction()
The Base Definitions volume of POSIX.1-2017,
<signal.h>
COPYRIGHT
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
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https://www.kernel.org/doc/man-pages/reporting_bugs.html .