.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
.\"
+.\" %%%LICENSE_START(VERBATIM)
.\" Permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\" Formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and authors of this work.
+.\" %%%LICENSE_END
.\"
.\" References consulted:
.\" Linux libc source code
.\" 386BSD man pages
.\" Modified Sun Jul 25 10:40:51 1993 by Rik Faith (faith@cs.unc.edu)
.\" Modified Sun Apr 14 16:20:34 1996 by Andries Brouwer (aeb@cwi.nl)
-.TH SIGINTERRUPT 3 2009-03-15 "" "Linux Programmer's Manual"
+.TH SIGINTERRUPT 3 2013-04-19 "" "Linux Programmer's Manual"
.SH NAME
siginterrupt \- allow signals to interrupt system calls
.SH SYNOPSIS
.in
.sp
.BR siginterrupt ():
-_BSD_SOURCE || _XOPEN_SOURCE\ >=\ 500
+.ad l
+.RS 4
+_BSD_SOURCE || _XOPEN_SOURCE\ >=\ 500 ||
+_XOPEN_SOURCE\ &&\ _XOPEN_SOURCE_EXTENDED
+.br
+|| /* Since glibc 2.12: */ _POSIX_C_SOURCE\ >=\ 200809L
+.RE
+.ad
.SH DESCRIPTION
The
.BR siginterrupt ()
argument is false (0), then system calls will be restarted if interrupted
by the specified signal \fIsig\fP.
This is the default behavior in Linux.
-However, when a new signal handler is specified with the
-.BR signal (2)
-function, the system call is interrupted by default.
.PP
If the \fIflag\fP argument is true (1) and no data has been transferred,
then a system call interrupted by the signal \fIsig\fP will return \-1
If the \fIflag\fP argument is true (1) and data transfer has started,
then the system call will be interrupted and will return the actual
amount of data transferred.
-.SH "RETURN VALUE"
+.SH RETURN VALUE
The
.BR siginterrupt ()
-function returns 0 on success, or \-1 if the
-signal number \fIsig\fP is invalid.
+function returns 0 on success.
+It returns \-1 if the
+signal number
+.I sig
+is invalid, with
+.I errno
+set to indicate the cause of the error.
.SH ERRORS
.TP
.B EINVAL
The specified signal number is invalid.
-.SH "CONFORMING TO"
+.SH CONFORMING TO
4.3BSD, POSIX.1-2001.
POSIX.1-2008 marks
.BR siginterrupt ()
with the
.B SA_RESTART
flag instead.
-.SH "SEE ALSO"
+.SH SEE ALSO
.BR signal (2)
+.SH COLOPHON
+This page is part of release 3.65 of the Linux
+.I man-pages
+project.
+A description of the project,
+and information about reporting bugs,
+can be found at
+\%http://www.kernel.org/doc/man\-pages/.