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glibc  2.9
uio.h
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00001 /* Copyright (C) 1991, 92, 96, 97, 98, 99, 2003 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #ifndef _SYS_UIO_H
00020 #define _SYS_UIO_H   1
00021 
00022 #include <features.h>
00023 
00024 #include <sys/types.h>
00025 
00026 __BEGIN_DECLS
00027 
00028 /* This file defines `struct iovec'.  */
00029 #include <bits/uio.h>
00030 
00031 
00032 /* Read data from file descriptor FD, and put the result in the
00033    buffers described by IOVEC, which is a vector of COUNT `struct iovec's.
00034    The buffers are filled in the order specified.
00035    Operates just like `read' (see <unistd.h>) except that data are
00036    put in IOVEC instead of a contiguous buffer.
00037 
00038    This function is a cancellation point and therefore not marked with
00039    __THROW.  */
00040 extern ssize_t readv (int __fd, __const struct iovec *__iovec, int __count);
00041 
00042 /* Write data pointed by the buffers described by IOVEC, which
00043    is a vector of COUNT `struct iovec's, to file descriptor FD.
00044    The data is written in the order specified.
00045    Operates just like `write' (see <unistd.h>) except that the data
00046    are taken from IOVEC instead of a contiguous buffer.
00047 
00048    This function is a cancellation point and therefore not marked with
00049    __THROW.  */
00050 extern ssize_t writev (int __fd, __const struct iovec *__iovec, int __count);
00051 
00052 __END_DECLS
00053 
00054 #endif /* sys/uio.h */