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
|
/*
* Invoke a socket syscall, either directly or via __NR_socketcall.
*
* Copyright (c) 2016-2018 Dmitry V. Levin <ldv@strace.io>
* Copyright (c) 2016-2021 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <errno.h>
#include <unistd.h>
#include "scno.h"
/*
* Invoke a socket syscall, either directly or via __NR_socketcall.
* if nr == -1, no direct syscall invocation will be made.
*/
int
socketcall(const int nr, const int call,
long a1, long a2, long a3, long a4, long a5)
{
int rc = -1;
errno = ENOSYS;
#ifdef __NR_socketcall
static int have_socketcall = -1;
if (have_socketcall < 0) {
if (syscall(__NR_socketcall, 0L, 0L, 0L, 0L, 0L) < 0
&& EINVAL == errno) {
have_socketcall = 1;
} else {
have_socketcall = 0;
}
}
if (have_socketcall) {
const long args[] = { a1, a2, a3, a4, a5 };
rc = syscall(__NR_socketcall, call, args);
} else
#endif
{
if (nr != -1)
rc = syscall(nr, a1, a2, a3, a4, a5);
}
return rc;
}
|
