| /* |
| * |
| * Copyright (c) International Business Machines Corp., 2002 |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| * the GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /* 12/20/2002 Port to LTP robbiew@us.ibm.com */ |
| /* 06/30/2001 Port to Linux nsharoff@us.ibm.com */ |
| |
| /* |
| * NAME |
| * shmt05 |
| * |
| * CALLS |
| * shmctl(2) shmget(2) shmat(2) |
| * |
| * ALGORITHM |
| * Create two shared memory segments and attach them to the same process |
| * at two different addresses. The addresses DO BUMP into each other. |
| * The second attach should Fail. |
| * |
| */ |
| |
| #include <stdio.h> |
| #include <sys/types.h> |
| #include <sys/ipc.h> |
| #include <sys/shm.h> |
| #include <sys/utsname.h> |
| #include <errno.h> |
| #include <time.h> |
| |
| /** LTP Port **/ |
| #include "test.h" |
| |
| char *TCID = "shmt05"; /* Test program identifier. */ |
| int TST_TOTAL = 2; /* Total number of test cases. */ |
| /**************/ |
| |
| key_t key[2]; |
| |
| #define SIZE (2*SHMLBA) |
| |
| int rm_shm(int); |
| |
| int main(void) |
| { |
| int shmid, shmid1; |
| char *cp, *cp1; |
| |
| srand48((getpid() << 16) + (unsigned)time(NULL)); |
| |
| key[0] = (key_t) lrand48(); |
| key[1] = (key_t) lrand48(); |
| |
| cp = NULL; |
| cp1 = NULL; |
| |
| /*--------------------------------------------------------*/ |
| |
| if ((shmid = shmget(key[0], SIZE, IPC_CREAT | 0666)) < 0) { |
| perror("shmget"); |
| tst_resm(TFAIL, |
| "Error: shmget: shmid = %d, errno = %d\n", |
| shmid, errno); |
| } else { |
| cp = shmat(shmid, NULL, 0); |
| |
| if (cp == (char *)-1) { |
| tst_resm(TFAIL, "shmat"); |
| rm_shm(shmid); |
| } |
| } |
| |
| tst_resm(TPASS, "shmget & shmat"); |
| |
| /*--------------------------------------------------------*/ |
| |
| if ((shmid1 = shmget(key[1], SIZE, IPC_CREAT | 0666)) < 0) { |
| perror("shmget2"); |
| tst_resm(TFAIL, |
| "Error: shmget: shmid1 = %d, errno = %d\n", |
| shmid1, errno); |
| } else { |
| cp1 = shmat(shmid1, cp + (SIZE / 2), 0); |
| if (cp1 != (char *)-1) { |
| perror("shmat"); |
| tst_resm(TFAIL, |
| "Error: shmat: shmid1 = %d, addr= %p, errno = %d\n", |
| shmid1, cp1, errno); |
| } else { |
| tst_resm(TPASS, "2nd shmget & shmat"); |
| } |
| } |
| |
| /*------------------------------------------------------*/ |
| |
| rm_shm(shmid); |
| rm_shm(shmid1); |
| |
| tst_exit(); |
| } |
| |
| int rm_shm(shmid) |
| int shmid; |
| { |
| if (shmctl(shmid, IPC_RMID, NULL) == -1) { |
| perror("shmctl"); |
| tst_brkm(TFAIL, |
| NULL, |
| "shmctl Failed to remove: shmid = %d, errno = %d\n", |
| shmid, errno); |
| } |
| return (0); |
| } |