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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 
+.TH "SIGINTERRUPT" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" siginterrupt 
+.SH NAME
+siginterrupt \- allow signals to interrupt functions
+.SH SYNOPSIS
+.LP
+\fB#include <signal.h>
+.br
+.sp
+int siginterrupt(int\fP \fIsig\fP\fB, int\fP \fIflag\fP\fB); \fP
+\fB
+.br
+\fP
+.SH DESCRIPTION
+.LP
+The \fIsiginterrupt\fP() function shall change the restart behavior
+when a function is interrupted by the specified signal. The
+function \fIsiginterrupt\fP(\fIsig\fP, \fIflag\fP) has an effect as
+if implemented as:
+.sp
+.RS
+.nf
+
+\fBint siginterrupt(int sig, int flag) {
+    int ret;
+    struct sigaction act;
+.sp
+
+    (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;
+}
+\fP
+.fi
+.RE
+.SH RETURN VALUE
+.LP
+Upon successful completion, \fIsiginterrupt\fP() shall return 0; otherwise,
+-1 shall be returned and \fIerrno\fP set to
+indicate the error.
+.SH ERRORS
+.LP
+The \fIsiginterrupt\fP() function shall fail if:
+.TP 7
+.B EINVAL
+The \fIsig\fP argument is not a valid signal number.
+.sp
+.LP
+\fIThe following sections are informative.\fP
+.SH EXAMPLES
+.LP
+None.
+.SH APPLICATION USAGE
+.LP
+The \fIsiginterrupt\fP() function supports programs written to historical
+system interfaces. A conforming application, when
+being written or rewritten, should use \fIsigaction\fP() with the
+SA_RESTART flag
+instead of \fIsiginterrupt\fP().
+.SH RATIONALE
+.LP
+None.
+.SH FUTURE DIRECTIONS
+.LP
+None.
+.SH SEE ALSO
+.LP
+\fISignal Concepts\fP , \fIsigaction\fP() , the Base
+Definitions volume of IEEE\ Std\ 1003.1-2001, \fI<signal.h>\fP
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
+-- 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 .