1 /* Copyright (C) 1991, 92, 96, 97, 98, 99, 2003 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, write to the Free 16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 17 02111-1307 USA. */ 18 19 #ifndef _SYS_UIO_H 20 #define _SYS_UIO_H 1 21 22 #include <features.h> 23 24 #include <sys/types.h> 25 26 __BEGIN_DECLS 27 28 /* This file defines `struct iovec'. */ 29 #include <bits/uio.h> 30 31 32 /* Read data from file descriptor FD, and put the result in the 33 buffers described by IOVEC, which is a vector of COUNT `struct iovec's. 34 The buffers are filled in the order specified. 35 Operates just like `read' (see <unistd.h>) except that data are 36 put in IOVEC instead of a contiguous buffer. 37 38 This function is a cancellation point and therefore not marked with 39 __THROW. */ 40 extern ssize_t readv (int __fd, __const struct iovec *__iovec, int __count); 41 42 /* Write data pointed by the buffers described by IOVEC, which 43 is a vector of COUNT `struct iovec's, to file descriptor FD. 44 The data is written in the order specified. 45 Operates just like `write' (see <unistd.h>) except that the data 46 are taken from IOVEC instead of a contiguous buffer. 47 48 This function is a cancellation point and therefore not marked with 49 __THROW. */ 50 extern ssize_t writev (int __fd, __const struct iovec *__iovec, int __count); 51 52 __END_DECLS 53 54 #endif /* sys/uio.h */ 55