1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
/*
* sendfile() for uClibc
*
* Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
#include <sys/syscall.h>
# include <sys/sendfile.h>
# include <bits/wordsize.h>
#if defined __NR_sendfile
_syscall4(ssize_t, sendfile, int, out_fd, int, in_fd, __off_t *, offset,
size_t, count)
# if !defined __NR_sendfile64 || __WORDSIZE == 64
libc_hidden_def(sendfile64)
strong_alias_untyped(sendfile,sendfile64)
# endif
#elif defined __NR_sendfile64 && !defined __NR_sendfile
# include <unistd.h>
# include <stddef.h>
ssize_t sendfile(int out_fd, int in_fd, __off_t *offset, size_t count)
{
__off64_t off64, *off;
ssize_t res;
/*
* Check if valid fds and valid pointers were passed
* This does not prevent the user from passing
* an arbitrary pointer causing a segfault or
* other security issues
*/
if (in_fd < 0 || out_fd < 0) {
__set_errno(EBADF);
return -1;
}
if ((int)offset < 0) {
__set_errno(EFAULT);
return -1;
}
if (offset) {
off = &off64;
off64 = *offset;
} else {
off = NULL;
}
res = INLINE_SYSCALL(sendfile64, 4, out_fd, in_fd, off, count);
if (res >= 0 && offset != NULL)
*offset = off64;
return res;
}
#endif
|
