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
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <errno.h>
#ifdef HAS_KCMP
#include <linux/kcmp.h>
#include <sys/syscall.h>
#endif
#include <sys/ipc.h>
#include <sys/msg.h>
#include <sys/sem.h>
#include <sys/shm.h>
#include <unistd.h>
#include <gtest/gtest.h>
#ifdef HAS_KCMP
int kcmp(pid_t pid1, pid_t pid2, int type, unsigned long idx1, unsigned long idx2) {
return syscall(SYS_kcmp, pid1, pid2, type, 0, idx1, idx2);
}
#endif
int msgctl(int id, int cmd, msqid_ds* buf) {
#if !defined(__LP64__) || defined(__mips__)
// Annoyingly, the kernel requires this for 32-bit but rejects it for 64-bit.
// Mips64 is an exception to this, it requires the flag.
cmd |= IPC_64;
#endif
#if defined(SYS_msgctl)
return syscall(SYS_msgctl, id, cmd, buf);
#else
return syscall(SYS_ipc, MSGCTL, id, cmd, 0, buf, 0);
#endif
}
int semctl(int id, int num, int cmd, semid_ds* buf) {
#if !defined(__LP64__) || defined(__mips__)
// Annoyingly, the kernel requires this for 32-bit but rejects it for 64-bit.
// Mips64 is an exception to this, it requires the flag.
cmd |= IPC_64;
#endif
#if defined(SYS_msgctl)
return syscall(SYS_semctl, id, num, cmd, buf);
#else
return syscall(SYS_ipc, SEMCTL, id, num, cmd, buf, 0);
#endif
}
int shmctl(int id, int cmd, shmid_ds* buf) {
#if !defined(__LP64__) || defined(__mips__)
// Annoyingly, the kernel requires this for 32-bit but rejects it for 64-bit.
// Mips64 is an exception to this, it requires the flag.
cmd |= IPC_64;
#endif
#if defined(SYS_shmctl)
return syscall(SYS_shmctl, id, cmd, buf);
#else
return syscall(SYS_ipc, SHMCTL, id, cmd, 0, buf, 0);
#endif
}
TEST(kernel_config, NOT_CONFIG_SYSVIPC) {
#ifdef HAS_KCMP
pid_t pid = getpid();
int ret = kcmp(pid, pid, KCMP_SYSVSEM, 0, 0);
int error = (ret == -1) ? (errno == ENOSYS) ? EOPNOTSUPP : errno : 0;
EXPECT_EQ(-1, kcmp(pid, pid, KCMP_SYSVSEM, 0, 0));
EXPECT_EQ(EOPNOTSUPP, error);
#endif
EXPECT_EQ(-1, access("/proc/sysvipc", R_OK));
EXPECT_EQ(-1, access("/proc/sysvipc/msg", F_OK));
EXPECT_EQ(-1, msgctl(-1, IPC_STAT, nullptr));
EXPECT_EQ(ENOSYS, errno);
EXPECT_EQ(-1, access("/proc/sysvipc/sem", F_OK));
EXPECT_EQ(-1, semctl(-1, 0, IPC_STAT, nullptr));
EXPECT_EQ(ENOSYS, errno);
EXPECT_EQ(-1, access("/proc/sysvipc/shm", F_OK));
EXPECT_EQ(-1, shmctl(-1, IPC_STAT, nullptr));
EXPECT_EQ(ENOSYS, errno);
}
|
