| .\" Copyright (C) 2024 Tony Solomonik <tony.solomonik@gmail.com> |
| .\" |
| .\" SPDX-License-Identifier: LGPL-2.0-or-later |
| .\" |
| .TH io_uring_prep_ftruncate 3 "January 23, 2024" "liburing-2.6" "liburing Manual" |
| .SH NAME |
| io_uring_prep_ftruncate \- prepare an ftruncate request |
| .SH SYNOPSIS |
| .nf |
| .B #include <liburing.h> |
| .PP |
| .BI "void io_uring_prep_ftruncate(struct io_uring_sqe *" sqe "," |
| .BI " int " fd "," |
| .BI " loff_t " len ");" |
| .fi |
| .SH DESCRIPTION |
| .PP |
| The |
| .BR io_uring_prep_ftruncate (3) |
| function prepares an ftruncate request. The submission queue entry |
| .I sqe |
| is setup to use the file descriptor |
| .I fd |
| that should get truncated to the length indicated by the |
| .I len |
| argument. |
| |
| Applications must define |
| .B _GNU_SOURCE |
| to obtain the definition of this helper, as |
| .I loff_t |
| will not be defined without it. |
| |
| .SH RETURN VALUE |
| None |
| .SH ERRORS |
| The CQE |
| .I res |
| field will contain the result of the operation. See the related man page for |
| details on possible values. Note that where synchronous system calls will return |
| .B -1 |
| on failure and set |
| .I errno |
| to the actual error value, io_uring never uses |
| .IR errno . |
| Instead it returns the negated |
| .I errno |
| directly in the CQE |
| .I res |
| field. |
| .SH SEE ALSO |
| .BR io_uring_get_sqe (3), |
| .BR io_uring_submit (3), |
| .BR ftruncate (2), |
