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+'\" et
+.TH SIGINTERRUPT "3P" 2017 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\"
+.SH 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.
+.\"
+.SH NAME
+siginterrupt
+\(em allow signals to interrupt functions
+.SH SYNOPSIS
+.LP
+.nf
+#include <signal.h>
+.P
+int siginterrupt(int \fIsig\fP, int \fIflag\fP);
+.fi
+.SH DESCRIPTION
+The
+\fIsiginterrupt\fR()
+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 4
+.nf
+
+int siginterrupt(int sig, int flag) {
+    int ret;
+    struct sigaction act;
+.P
+    (void) sigaction(sig, NULL, &act);
+    if (flag)
+        act.sa_flags &= \(tiSA_RESTART;
+    else
+        act.sa_flags |= SA_RESTART;
+    ret = sigaction(sig, &act, NULL);
+    return ret;
+}
+.fi
+.P
+.RE
+.SH "RETURN VALUE"
+Upon successful completion,
+\fIsiginterrupt\fR()
+shall return 0; otherwise, \-1 shall be returned and
+.IR errno
+set to indicate the error.
+.SH ERRORS
+The
+\fIsiginterrupt\fR()
+function shall fail if:
+.TP
+.BR EINVAL
+The
+.IR sig
+argument is not a valid signal number.
+.LP
+.IR "The following sections are informative."
+.SH EXAMPLES
+None.
+.SH "APPLICATION USAGE"
+The
+\fIsiginterrupt\fR()
+function supports programs written to historical system interfaces.
+Applications should use the
+\fIsigaction\fR()
+with the SA_RESTART flag instead of the obsolescent
+\fIsiginterrupt\fR()
+function.
+.SH RATIONALE
+None.
+.SH "FUTURE DIRECTIONS"
+None.
+.SH "SEE ALSO"
+.IR "Section 2.4" ", " "Signal Concepts",
+.IR "\fIsigaction\fR\^(\|)"
+.P
+The Base Definitions volume of POSIX.1\(hy2017,
+.IR "\fB<signal.h>\fP"
+.\"
+.SH 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 .
+.PP
+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.kernel.org/doc/man-pages/reporting_bugs.html .