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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:40:15 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:40:15 +0000 |
commit | 399644e47874bff147afb19c89228901ac39340e (patch) | |
tree | 1c4c0b733f4c16b5783b41bebb19194a9ef62ad1 /man2/io_cancel.2 | |
parent | Initial commit. (diff) | |
download | manpages-399644e47874bff147afb19c89228901ac39340e.tar.xz manpages-399644e47874bff147afb19c89228901ac39340e.zip |
Adding upstream version 6.05.01.upstream/6.05.01
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'man2/io_cancel.2')
-rw-r--r-- | man2/io_cancel.2 | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/man2/io_cancel.2 b/man2/io_cancel.2 new file mode 100644 index 0000000..1b413e2 --- /dev/null +++ b/man2/io_cancel.2 @@ -0,0 +1,106 @@ +.\" Copyright (C) 2003 Free Software Foundation, Inc. +.\" +.\" SPDX-License-Identifier: GPL-1.0-or-later +.\" +.TH io_cancel 2 2023-03-30 "Linux man-pages 6.05.01" +.SH NAME +io_cancel \- cancel an outstanding asynchronous I/O operation +.SH LIBRARY +Standard C library +.RI ( libc ", " \-lc ) +.PP +Alternatively, Asynchronous I/O library +.RI ( libaio ", " \-laio ); +see VERSIONS. +.SH SYNOPSIS +.nf +.BR "#include <linux/aio_abi.h>" " /* Definition of needed types */" +.BR "#include <sys/syscall.h>" " /* Definition of " SYS_* " constants */" +.B #include <unistd.h> +.PP +.BI "int syscall(SYS_io_cancel, aio_context_t " ctx_id ", struct iocb *" iocb , +.BI " struct io_event *" result ); +.fi +.SH DESCRIPTION +.IR Note : +this page describes the raw Linux system call interface. +The wrapper function provided by +.I libaio +uses a different type for the +.I ctx_id +argument. +See VERSIONS. +.PP +The +.BR io_cancel () +system call +attempts to cancel an asynchronous I/O operation previously submitted with +.BR io_submit (2). +The +.I iocb +argument describes the operation to be canceled and the +.I 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 +.I result +without being placed into the +completion queue. +.SH RETURN VALUE +On success, +.BR io_cancel () +returns 0. +For the failure return, see VERSIONS. +.SH ERRORS +.TP +.B EAGAIN +The \fIiocb\fP specified was not canceled. +.TP +.B EFAULT +One of the data structures points to invalid data. +.TP +.B EINVAL +The AIO context specified by \fIctx_id\fP is invalid. +.TP +.B ENOSYS +.BR io_cancel () +is not implemented on this architecture. +.SH VERSIONS +You probably want to use the +.BR io_cancel () +wrapper function provided by +.\" http://git.fedorahosted.org/git/?p=libaio.git +.IR libaio . +.PP +Note that the +.I libaio +wrapper function uses a different type +.RI ( io_context_t ) +.\" But glibc is confused, since <libaio.h> uses 'io_context_t' to declare +.\" the system call. +for the +.I ctx_id +argument. +Note also that the +.I 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 +.BR syscall (2), +then the return value follows the usual conventions for +indicating an error: \-1, with +.I errno +set to a (positive) value that indicates the error. +.SH STANDARDS +Linux. +.SH HISTORY +Linux 2.5. +.SH SEE ALSO +.BR io_destroy (2), +.BR io_getevents (2), +.BR io_setup (2), +.BR io_submit (2), +.BR aio (7) +.\" .SH AUTHOR +.\" Kent Yoder. |