| /* |
| * |
| * 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 |
| * shmt10.c - test simultaneous shmat/shmdt |
| * |
| * CALLS |
| * shmget, shmat, shmdt, shmctl |
| * |
| * ALGORITHM |
| * Create a shared memory segment and fork a child. Both |
| * parent and child spin in a loop attaching and detaching |
| * the segment. After completing the specified number of |
| * iterations, the child exits and the parent deletes the |
| * segment. |
| * |
| * USAGE |
| * shmt10 [-i 500] |
| * -i # of iterations, default 500 |
| * |
| */ |
| |
| #include <stdio.h> |
| #include <sys/types.h> |
| #include <sys/wait.h> |
| #include <sys/ipc.h> |
| #include <sys/shm.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <signal.h> |
| #include <errno.h> |
| |
| #define SIZE 0x32768 |
| |
| /** LTP Port **/ |
| #include "test.h" |
| |
| char *TCID = "shmt10"; /* Test program identifier. */ |
| int TST_TOTAL = 2; /* Total number of test cases. */ |
| /**************/ |
| |
| int shmid; |
| key_t key; |
| |
| int child(int); |
| int rm_shm(int); |
| void fini(); |
| |
| int main(argc, argv) |
| int argc; |
| char *argv[]; |
| { |
| char *c1 = NULL; |
| int pid, st; |
| register int i; |
| int iter = 500; |
| int c; |
| extern char *optarg; |
| |
| key = (key_t) getpid(); |
| signal(SIGTERM, fini); |
| |
| /*--------------------------------------------------------*/ |
| |
| while ((c = getopt(argc, argv, "i:")) != EOF) { |
| switch (c) { |
| case 'i': |
| iter = atoi(optarg); |
| break; |
| default: |
| tst_brkm(TCONF, NULL, "usage: %s [-i <# iterations>]", |
| argv[0]); |
| } |
| } |
| |
| /*------------------------------------------------------------------------*/ |
| |
| if ((shmid = shmget(key, SIZE, IPC_CREAT | 0666)) < 0) { |
| tst_resm(TFAIL, "shmget"); |
| tst_brkm(TFAIL, NULL, "Error: shmid = %d\n", shmid); |
| } |
| |
| pid = fork(); |
| switch (pid) { |
| case -1: |
| tst_brkm(TBROK, NULL, "fork failed"); |
| case 0: |
| child(iter); |
| tst_exit(); |
| } |
| |
| for (i = 0; i < iter; i++) { |
| if ((c1 = shmat(shmid, NULL, 0)) == (char *)-1) { |
| tst_resm(TFAIL, |
| "Error shmat: iter %d, shmid = %d\n", i, |
| shmid); |
| break; |
| } |
| if (shmdt(c1) < 0) { |
| tst_resm(TFAIL, "Error: shmdt: iter %d ", i); |
| break; |
| } |
| } |
| while (wait(&st) < 0 && errno == EINTR) ; |
| tst_resm(TPASS, "shmat,shmdt"); |
| /*------------------------------------------------------------------------*/ |
| |
| rm_shm(shmid); |
| 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); |
| } |
| |
| int child(iter) |
| int iter; |
| { |
| register int i; |
| char *c1; |
| |
| for (i = 0; i < iter; i++) { |
| if ((c1 = shmat(shmid, NULL, 0)) == (char *)-1) { |
| tst_brkm(TFAIL, |
| NULL, |
| "Error:child proc: shmat: iter %d, shmid = %d\n", |
| i, shmid); |
| } |
| if (shmdt(c1) < 0) { |
| tst_brkm(TFAIL, |
| NULL, "Error: child proc: shmdt: iter %d ", |
| i); |
| } |
| } |
| return (0); |
| } |
| |
| void fini() |
| { |
| rm_shm(shmid); |
| } |