/* * * 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 * shmt08 * * CALLS * shmctl(2) shmget(2) shmat(2) shmdt(2) * * ALGORITHM * Create a shared memory segment. Attach it twice at an address * that is provided by the system. Detach the previously attached * segments from the process. * */ #include <stdio.h> #include <sys/types.h> #include <sys/ipc.h> #include <sys/shm.h> #include <errno.h> #define K_1 1024 /** LTP Port **/ #include "test.h" char *TCID = "shmt08"; /* Test program identifier. */ int TST_TOTAL = 2; /* Total number of test cases. */ /**************/ key_t key; static int rm_shm(int); int main(void) { char *cp = NULL, *cp1 = NULL; int shmid; key = (key_t) getpid(); errno = 0; /*-------------------------------------------------------*/ if ((shmid = shmget(key, 24 * K_1, IPC_CREAT | 0666)) < 0) { perror("shmget"); tst_brkm(TFAIL, NULL, "Error: shmget: shmid = %d, errno = %d\n", shmid, errno); } cp = shmat(shmid, NULL, 0); if (cp == (char *)-1) { tst_resm(TFAIL, "shmat1 Failed"); rm_shm(shmid); tst_exit(); } cp1 = shmat(shmid, NULL, 0); if (cp1 == (char *)-1) { perror("shmat2"); rm_shm(shmid); tst_exit(); } tst_resm(TPASS, "shmget,shmat"); /*--------------------------------------------------------*/ if (shmdt(cp) < 0) { perror("shmdt2"); tst_resm(TFAIL, "shmdt:cp"); } if (shmdt(cp1) < 0) { perror("shmdt1"); tst_resm(TFAIL, "shmdt:cp1"); } tst_resm(TPASS, "shmdt"); /*---------------------------------------------------------*/ rm_shm(shmid); tst_exit(); } static int rm_shm(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); }