git://sourceware.org / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 78239589 | 1 | /* Copyright (C) 1996, 1997, 2006, 2011 Free Software Foundation, Inc. |
| 3e5f5557 | 2 | This file is part of the GNU C Library. |
| 857fa1b8 | 3 | |
| 3e5f5557 | 4 | The GNU C Library is free software; you can redistribute it and/or |
| 41bdb6e2 AJ |
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. | |
| 3e5f5557 UD |
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 | |
| 41bdb6e2 | 12 | Lesser General Public License for more details. |
| 3e5f5557 | 13 | |
| 41bdb6e2 AJ |
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. */ | |
| 3e5f5557 | 18 | |
| b8c31ac1 | 19 | #if !defined _SYS_UIO_H && !defined _FCNTL_H |
| f4017d20 | 20 | # error "Never include <bits/uio.h> directly; use <sys/uio.h> instead." |
| 5107cf1d | 21 | #endif |
| 3e5f5557 | 22 | |
| 15627a21 UD |
23 | #ifndef _BITS_UIO_H |
| 24 | #define _BITS_UIO_H 1 | |
| 3e5f5557 UD |
25 | |
| 26 | #include <sys/types.h> | |
| 27 | ||
| 28 | ||
| 29 | /* We should normally use the Linux kernel header file to define this | |
| 30 | type and macros but this calls for trouble because of the header | |
| 31 | includes other kernel headers. */ | |
| 32 | ||
| 33 | /* Size of object which can be written atomically. | |
| 34 | ||
| 35 | This macro has different values in different kernel versions. The | |
| f4d22f0f | 36 | latest versions of the kernel use 1024 and this is good choice. Since |
| 3e5f5557 UD |
37 | the C library implementation of readv/writev is able to emulate the |
| 38 | functionality even if the currently running kernel does not support | |
| 39 | this large value the readv/writev call will not fail because of this. */ | |
| 40 | #define UIO_MAXIOV 1024 | |
| 41 | ||
| 42 | ||
| 43 | /* Structure for scatter/gather I/O. */ | |
| 44 | struct iovec | |
| 45 | { | |
| 46 | void *iov_base; /* Pointer to data. */ | |
| 47 | size_t iov_len; /* Length of data. */ | |
| 48 | }; | |
| 15627a21 UD |
49 | |
| 50 | #endif | |
| 78239589 UD |
51 | |
| 52 | #if defined _SYS_UIO_H && !defined _BITS_UIO_H_FOR_SYS_UIO_H | |
| 53 | #define _BITS_UIO_H_FOR_SYS_UIO_H 1 | |
| 54 | ||
| 55 | __BEGIN_DECLS | |
| 56 | ||
| 57 | /* Read from another process' address space. */ | |
| 58 | extern ssize_t process_vm_readv (pid_t __pid, __const struct iovec *__lvec, | |
| 59 | size_t __liovcnt, | |
| 60 | __const struct iovec *__rvec, | |
| 61 | size_t __riovcnt, unsigned long int __flags) | |
| 62 | __THROW; | |
| 63 | ||
| 64 | /* Write to another process' address space. */ | |
| 65 | extern ssize_t process_vm_writev (pid_t __pid, __const struct iovec *__lvec, | |
| 66 | size_t __liovcnt, | |
| 67 | __const struct iovec *__rvec, | |
| 68 | size_t __riovcnt, unsigned long int __flags) | |
| 69 | __THROW; | |
| 70 | ||
| 71 | __END_DECLS | |
| 72 | ||
| 73 | #endif |