from small one page howto to huge articles all in one place
 

search text in:





Poll
Which kernel version do you use?





poll results

Last additions:
using iotop to find disk usage hogs

using iotop to find disk usage hogs

words:

887

views:

90827

userrating:

average rating: 1.7 (82 votes) (1=very good 6=terrible)


May 25th. 2007:
Words

486

Views

206720

why adblockers are bad


Workaround and fixes for the current Core Dump Handling vulnerability affected kernels

Workaround and fixes for the current Core Dump Handling vulnerability affected kernels

words:

161

views:

88288

userrating:

average rating: 1.3 (28 votes) (1=very good 6=terrible)


April, 26th. 2006:

Druckversion
You are here: manpages





IO_CANCEL

Section: Linux Programmer's Manual (2)
Updated: 2013-04-10
Index Return to Main Contents
 

NAME

io_cancel - cancel an outstanding asynchronous I/O operation  

SYNOPSIS

#include <linux/aio_abi.h>          /* Defines needed types */

int io_cancel(aio_context_t ctx_id, struct iocb *iocb,
              struct io_event *result);

Note: There is no glibc wrapper for this system call; see NOTES.  

DESCRIPTION

The io_cancel() system call attempts to cancel an asynchronous I/O operation previously submitted with io_submit(2). The iocb argument describes the operation to be canceled and the ctx_id argument is the AIO context to which the operation was submitted. If the operation is successfully canceled, the event will be copied into the memory pointed to by result without being placed into the completion queue.  

RETURN VALUE

On success, io_cancel() returns 0. For the failure return, see NOTES.  

ERRORS

EAGAIN
The iocb specified was not canceled.
EFAULT
One of the data structures points to invalid data.
EINVAL
The AIO context specified by ctx_id is invalid.
ENOSYS
io_cancel() is not implemented on this architecture.
 

VERSIONS

The asynchronous I/O system calls first appeared in Linux 2.5.  

CONFORMING TO

io_cancel() is Linux-specific and should not be used in programs that are intended to be portable.  

NOTES

Glibc does not provide a wrapper function for this system call. You could invoke it using syscall(2). But instead, you probably want to use the io_cancel() wrapper function provided by libaio.

Note that the libaio wrapper function uses a different type (io_context_t) for the ctx_id argument. Note also that the libaio wrapper does not follow the usual C library conventions for indicating errors: on error it returns a negated error number (the negative of one of the values listed in ERRORS). If the system call is invoked via syscall(2), then the return value follows the usual conventions for indicating an error: -1, with errno set to a (positive) value that indicates the error.  

SEE ALSO

io_destroy(2), io_getevents(2), io_setup(2), io_submit(2), aio(7)  

COLOPHON

This page is part of release 3.81 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 http://www.kernel.org/doc/man-pages/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
VERSIONS
CONFORMING TO
NOTES
SEE ALSO
COLOPHON


Please read "Why adblockers are bad".



Other free services
toURL.org
Shorten long
URLs to short
links like
http://tourl.org/2
tourl.org
.
Reverse DNS lookup
Find out which hostname(s)
resolve to a
given IP or other hostnames for the server
www.reversednslookup.org
rdf newsfeed | rss newsfeed | Atom newsfeed
- Powered by LeopardCMS - Running on Gentoo -
Copyright 2004-2013 Sascha Nitsch Unternehmensberatung UG(haftungsbeschränkt)
Valid XHTML1.1 : Valid CSS : buttonmaker
- Level Triple-A Conformance to Web Content Accessibility Guidelines 1.0 -
- Copyright and legal notices -
Time to create this page: 4.0 ms