| /* Copyright (C) 1991,1992,1996-1999,2003,2009 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #ifndef _SYS_UIO_H |
| #define _SYS_UIO_H 1 |
| |
| #include <features.h> |
| |
| #include <sys/types.h> |
| |
| __BEGIN_DECLS |
| |
| /* This file defines `struct iovec'. */ |
| #include <bits/uio.h> |
| |
| |
| /* Read data from file descriptor FD, and put the result in the |
| buffers described by IOVEC, which is a vector of COUNT 'struct iovec's. |
| The buffers are filled in the order specified. |
| Operates just like 'read' (see <unistd.h>) except that data are |
| put in IOVEC instead of a contiguous buffer. |
| |
| This function is a cancellation point and therefore not marked with |
| __THROW. */ |
| extern ssize_t readv (int __fd, __const struct iovec *__iovec, int __count) |
| __wur; |
| |
| /* Write data pointed by the buffers described by IOVEC, which |
| is a vector of COUNT 'struct iovec's, to file descriptor FD. |
| The data is written in the order specified. |
| Operates just like 'write' (see <unistd.h>) except that the data |
| are taken from IOVEC instead of a contiguous buffer. |
| |
| This function is a cancellation point and therefore not marked with |
| __THROW. */ |
| extern ssize_t writev (int __fd, __const struct iovec *__iovec, int __count) |
| __wur; |
| |
| |
| #ifdef __USE_BSD |
| # ifndef __USE_FILE_OFFSET64 |
| /* Read data from file descriptor FD at the given position OFFSET |
| without change the file pointer, and put the result in the buffers |
| described by IOVEC, which is a vector of COUNT 'struct iovec's. |
| The buffers are filled in the order specified. Operates just like |
| 'pread' (see <unistd.h>) except that data are put in IOVEC instead |
| of a contiguous buffer. |
| |
| This function is a cancellation point and therefore not marked with |
| __THROW. */ |
| extern ssize_t preadv (int __fd, __const struct iovec *__iovec, int __count, |
| __off_t __offset) __wur; |
| |
| /* Write data pointed by the buffers described by IOVEC, which is a |
| vector of COUNT 'struct iovec's, to file descriptor FD at the given |
| position OFFSET without change the file pointer. The data is |
| written in the order specified. Operates just like 'pwrite' (see |
| <unistd.h>) except that the data are taken from IOVEC instead of a |
| contiguous buffer. |
| |
| This function is a cancellation point and therefore not marked with |
| __THROW. */ |
| extern ssize_t pwritev (int __fd, __const struct iovec *__iovec, int __count, |
| __off_t __offset) __wur; |
| # else |
| # ifdef __REDIRECT |
| extern ssize_t __REDIRECT (preadv, (int __fd, __const struct iovec *__iovec, |
| int __count, __off64_t __offset), |
| preadv64) __wur; |
| extern ssize_t __REDIRECT (pwritev, (int __fd, __const struct iovec *__iovec, |
| int __count, __off64_t __offset), |
| pwritev64) __wur; |
| # else |
| # define preadv preadv64 |
| # define pwritev pwritev64 |
| # endif |
| # endif |
| |
| # ifdef __USE_LARGEFILE64 |
| /* Read data from file descriptor FD at the given position OFFSET |
| without change the file pointer, and put the result in the buffers |
| described by IOVEC, which is a vector of COUNT 'struct iovec's. |
| The buffers are filled in the order specified. Operates just like |
| 'pread' (see <unistd.h>) except that data are put in IOVEC instead |
| of a contiguous buffer. |
| |
| This function is a cancellation point and therefore not marked with |
| __THROW. */ |
| extern ssize_t preadv64 (int __fd, __const struct iovec *__iovec, int __count, |
| __off64_t __offset) __wur; |
| |
| /* Write data pointed by the buffers described by IOVEC, which is a |
| vector of COUNT 'struct iovec's, to file descriptor FD at the given |
| position OFFSET without change the file pointer. The data is |
| written in the order specified. Operates just like 'pwrite' (see |
| <unistd.h>) except that the data are taken from IOVEC instead of a |
| contiguous buffer. |
| |
| This function is a cancellation point and therefore not marked with |
| __THROW. */ |
| extern ssize_t pwritev64 (int __fd, __const struct iovec *__iovec, int __count, |
| __off64_t __offset) __wur; |
| # endif |
| #endif /* Use BSD */ |
| |
| __END_DECLS |
| |
| #endif /* sys/uio.h */ |