1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 #include <errno.h> 17 #ifdef HAS_KCMP 18 #include <linux/kcmp.h> 19 #include <sys/syscall.h> 20 #endif 21 #include <sys/ipc.h> 22 #include <sys/msg.h> 23 #include <sys/sem.h> 24 #include <sys/shm.h> 25 #include <unistd.h> 26 27 #include <gtest/gtest.h> 28 29 #ifdef HAS_KCMP 30 int kcmp(pid_t pid1, pid_t pid2, int type, unsigned long idx1, unsigned long idx2) { 31 return syscall(SYS_kcmp, pid1, pid2, type, 0, idx1, idx2); 32 } 33 #endif 34 35 int msgctl(int id, int cmd, msqid_ds* buf) { 36 #if !defined(__LP64__) || defined(__mips__) 37 // Annoyingly, the kernel requires this for 32-bit but rejects it for 64-bit. 38 // Mips64 is an exception to this, it requires the flag. 39 cmd |= IPC_64; 40 #endif 41 #if defined(SYS_msgctl) 42 return syscall(SYS_msgctl, id, cmd, buf); 43 #else 44 return syscall(SYS_ipc, MSGCTL, id, cmd, 0, buf, 0); 45 #endif 46 } 47 48 int semctl(int id, int num, int cmd, semid_ds* buf) { 49 #if !defined(__LP64__) || defined(__mips__) 50 // Annoyingly, the kernel requires this for 32-bit but rejects it for 64-bit. 51 // Mips64 is an exception to this, it requires the flag. 52 cmd |= IPC_64; 53 #endif 54 #if defined(SYS_msgctl) 55 return syscall(SYS_semctl, id, num, cmd, buf); 56 #else 57 return syscall(SYS_ipc, SEMCTL, id, num, cmd, buf, 0); 58 #endif 59 } 60 61 int shmctl(int id, int cmd, shmid_ds* buf) { 62 #if !defined(__LP64__) || defined(__mips__) 63 // Annoyingly, the kernel requires this for 32-bit but rejects it for 64-bit. 64 // Mips64 is an exception to this, it requires the flag. 65 cmd |= IPC_64; 66 #endif 67 #if defined(SYS_shmctl) 68 return syscall(SYS_shmctl, id, cmd, buf); 69 #else 70 return syscall(SYS_ipc, SHMCTL, id, cmd, 0, buf, 0); 71 #endif 72 } 73 74 TEST(kernel_config, NOT_CONFIG_SYSVIPC) { 75 #ifdef HAS_KCMP 76 pid_t pid = getpid(); 77 int ret = kcmp(pid, pid, KCMP_SYSVSEM, 0, 0); 78 int error = (ret == -1) ? (errno == ENOSYS) ? EOPNOTSUPP : errno : 0; 79 EXPECT_EQ(-1, kcmp(pid, pid, KCMP_SYSVSEM, 0, 0)); 80 EXPECT_EQ(EOPNOTSUPP, error); 81 #endif 82 83 EXPECT_EQ(-1, access("/proc/sysvipc", R_OK)); 84 85 EXPECT_EQ(-1, access("/proc/sysvipc/msg", F_OK)); 86 EXPECT_EQ(-1, msgctl(-1, IPC_STAT, nullptr)); 87 EXPECT_EQ(ENOSYS, errno); 88 89 EXPECT_EQ(-1, access("/proc/sysvipc/sem", F_OK)); 90 EXPECT_EQ(-1, semctl(-1, 0, IPC_STAT, nullptr)); 91 EXPECT_EQ(ENOSYS, errno); 92 93 EXPECT_EQ(-1, access("/proc/sysvipc/shm", F_OK)); 94 EXPECT_EQ(-1, shmctl(-1, IPC_STAT, nullptr)); 95 EXPECT_EQ(ENOSYS, errno); 96 } 97 98