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a784e502 | 1 | /* Copyright (C) 1996, 1997, 2006, 2011, 2012 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. */ | |
a784e502 | 58 | extern ssize_t process_vm_readv (pid_t __pid, const struct iovec *__lvec, |
e35f65ea | 59 | unsigned long int __liovcnt, |
a784e502 | 60 | const struct iovec *__rvec, |
e35f65ea UD |
61 | unsigned long int __riovcnt, |
62 | unsigned long int __flags) | |
78239589 UD |
63 | __THROW; |
64 | ||
65 | /* Write to another process' address space. */ | |
a784e502 | 66 | extern ssize_t process_vm_writev (pid_t __pid, const struct iovec *__lvec, |
e35f65ea | 67 | unsigned long int __liovcnt, |
a784e502 | 68 | const struct iovec *__rvec, |
e35f65ea UD |
69 | unsigned long int __riovcnt, |
70 | unsigned long int __flags) | |
78239589 UD |
71 | __THROW; |
72 | ||
73 | __END_DECLS | |
74 | ||
75 | #endif |