mirror of https://github.com/mkerrisk/man-pages
85 lines
2.3 KiB
Plaintext
85 lines
2.3 KiB
Plaintext
.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
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.TH "SIGINTERRUPT" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
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.\" siginterrupt
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.SH NAME
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siginterrupt \- allow signals to interrupt functions
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.SH SYNOPSIS
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.LP
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\fB#include <signal.h>
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.br
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.sp
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int siginterrupt(int\fP \fIsig\fP\fB, int\fP \fIflag\fP\fB); \fP
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\fB
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.br
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\fP
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.SH DESCRIPTION
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.LP
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The \fIsiginterrupt\fP() function shall change the restart behavior
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when a function is interrupted by the specified signal. The
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function \fIsiginterrupt\fP(\fIsig\fP, \fIflag\fP) has an effect as
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if implemented as:
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.sp
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.RS
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.nf
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\fBint siginterrupt(int sig, int flag) {
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int ret;
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struct sigaction act;
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.sp
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(void) sigaction(sig, NULL, &act);
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if (flag)
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act.sa_flags &= ~SA_RESTART;
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else
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act.sa_flags |= SA_RESTART;
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ret = sigaction(sig, &act, NULL);
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return ret;
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}
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\fP
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.fi
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.RE
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.SH RETURN VALUE
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.LP
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Upon successful completion, \fIsiginterrupt\fP() shall return 0; otherwise,
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-1 shall be returned and \fIerrno\fP set to
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indicate the error.
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.SH ERRORS
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.LP
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The \fIsiginterrupt\fP() function shall fail if:
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.TP 7
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.B EINVAL
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The \fIsig\fP argument is not a valid signal number.
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.sp
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.LP
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\fIThe following sections are informative.\fP
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.SH EXAMPLES
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.LP
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None.
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.SH APPLICATION USAGE
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.LP
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The \fIsiginterrupt\fP() function supports programs written to historical
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system interfaces. A conforming application, when
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being written or rewritten, should use \fIsigaction\fP() with the
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SA_RESTART flag
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instead of \fIsiginterrupt\fP().
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.SH RATIONALE
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.LP
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None.
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.SH FUTURE DIRECTIONS
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.LP
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None.
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.SH SEE ALSO
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.LP
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\fISignal Concepts\fP , \fIsigaction\fP() , the Base
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Definitions volume of IEEE\ Std\ 1003.1-2001, \fI<signal.h>\fP
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.SH COPYRIGHT
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Portions of this text are reprinted and reproduced in electronic form
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from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
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-- Portable Operating System Interface (POSIX), The Open Group Base
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Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
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Electrical and Electronics Engineers, Inc and The Open Group. In the
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event of any discrepancy between this version and the original IEEE and
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The Open Group Standard, the original IEEE and The Open Group Standard
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is the referee document. The original Standard can be obtained online at
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http://www.opengroup.org/unix/online.html .
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