1 .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
3 .\" Permission is granted to make and distribute verbatim copies of this
4 .\" manual provided the copyright notice and this permission notice are
5 .\" preserved on all copies.
7 .\" Permission is granted to copy and distribute modified versions of this
8 .\" manual under the conditions for verbatim copying, provided that the
9 .\" entire resulting derived work is distributed under the terms of a
10 .\" permission notice identical to this one.
12 .\" Since the Linux kernel and libraries are constantly changing, this
13 .\" manual page may be incorrect or out-of-date. The author(s) assume no
14 .\" responsibility for errors or omissions, or for damages resulting from
15 .\" the use of the information contained herein. The author(s) may not
16 .\" have taken the same level of care in the production of this manual,
17 .\" which is licensed free of charge, as they might when working
20 .\" Formatted or processed versions of this manual, if unaccompanied by
21 .\" the source, must acknowledge the copyright and authors of this work.
23 .\" References consulted:
24 .\" Linux libc source code
25 .\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
27 .\" Modified Sun Jul 25 10:40:51 1993 by Rik Faith (faith@cs.unc.edu)
28 .\" Modified Sun Apr 14 16:20:34 1996 by Andries Brouwer (aeb@cwi.nl)
29 .TH SIGINTERRUPT 3 2009-03-15 "" "Linux Programmer's Manual"
31 siginterrupt \- allow signals to interrupt system calls
34 .B #include <signal.h>
36 .BI "int siginterrupt(int " sig ", int " flag );
40 Feature Test Macro Requirements for glibc (see
41 .BR feature_test_macros (7)):
45 _BSD_SOURCE || _XOPEN_SOURCE\ >=\ 500
49 function changes the restart behavior when
50 a system call is interrupted by the signal \fIsig\fP.
52 argument is false (0), then system calls will be restarted if interrupted
53 by the specified signal \fIsig\fP.
54 This is the default behavior in Linux.
55 However, when a new signal handler is specified with the
57 function, the system call is interrupted by default.
59 If the \fIflag\fP argument is true (1) and no data has been transferred,
60 then a system call interrupted by the signal \fIsig\fP will return \-1
61 and \fIerrno\fP will be set to
64 If the \fIflag\fP argument is true (1) and data transfer has started,
65 then the system call will be interrupted and will return the actual
66 amount of data transferred.
70 function returns 0 on success, or \-1 if the
71 signal number \fIsig\fP is invalid.
75 The specified signal number is invalid.
80 as obsolete, recommending the use of