siginterrupt — allow signals to interrupt system calls
changes the restart behavior when a system call is
interrupted by the signal
sig. If the
flag argument is false (0),
then system calls will be restarted if interrupted by the
This is the default behavior in Linux.
argument is true (1) and no data has been transferred, then a
system call interrupted by the signal
sig will return −1 and
errno will be set to
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.
returns 0 on success. It returns −1 if the signal
errno set to
indicate the cause of the error.
For an explanation of the terms used in this section, see attributes(7).
||Thread safety||MT-Unsafe const:sigintr|
4.3BSD, POSIX.1-2001. POSIX.1-2008 marks
siginterrupt() as obsolete, recommending
the use of sigaction(2) with the
SA_RESTART flag instead.
This page is part of release 4.07 of the Linux
man-pages project. A
description of the project, information about reporting bugs,
and the latest version of this page, can be found at
Copyright 1993 David Metcalfe (davidprism.demon.co.uk)
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.
Permission is granted to copy and distribute modified versions of this
manual under the conditions for verbatim copying, provided that the
entire resulting derived work is distributed under the terms of a
permission notice identical to this one.
Since the Linux kernel and libraries are constantly changing, this
manual page may be incorrect or out-of-date. The author(s) assume no
responsibility for errors or omissions, or for damages resulting from
the use of the information contained herein. The author(s) may not
have taken the same level of care in the production of this manual,
which is licensed free of charge, as they might when working
Formatted or processed versions of this manual, if unaccompanied by
the source, must acknowledge the copyright and authors of this work.
Linux libc source code
Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
386BSD man pages
Modified Sun Jul 25 10:40:51 1993 by Rik Faith (faithcs.unc.edu)
Modified Sun Apr 14 16:20:34 1996 by Andries Brouwer (aebcwi.nl)