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SIGINTERRUPT
Section: Linux Programmer's Manual (3)
Updated: 2010-09-20
Index
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NAME
siginterrupt - allow signals to interrupt system calls
SYNOPSIS
#include <signal.h>
int siginterrupt(int sig, int flag);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
siginterrupt():
-
- Since glibc 2.12
-
_BSD_SOURCE || _XOPEN_SOURCE >= 500 ||
_XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED ||
_POSIX_C_SOURCE >= 200809L || _XOPEN_SOURCE >= 700
- Before glibc 2.12
-
_BSD_SOURCE || _XOPEN_SOURCE >= 500 ||
_XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED
DESCRIPTION
The
siginterrupt()
function 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 specified signal sig.
This is the default behavior in Linux.
However, when a new signal handler is specified with the
signal(2)
function, the system call is interrupted by default.
If the flag 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
EINTR.
If the flag 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.
RETURN VALUE
The
siginterrupt()
function returns 0 on success, or -1 if the
signal number sig is invalid.
ERRORS
- EINVAL
-
The specified signal number is invalid.
CONFORMING TO
4.3BSD, POSIX.1-2001.
POSIX.1-2008 marks
siginterrupt()
as obsolete, recommending the use of
sigaction(2)
with the
SA_RESTART
flag instead.
SEE ALSO
signal(2)
COLOPHON
This page is part of release 3.27 of the Linux
man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- CONFORMING TO
-
- SEE ALSO
-
- COLOPHON
-
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