| /* ************************************************************************* |
| * Copyright (c) International Business Machines Corp., 2009 |
| * 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 |
| * |
| * Author: Veerendra C <vechandr@in.ibm.com> |
| * |
| * In Parent Process , create semaphore with key 154326L |
| * Now create container by passing 1 of the below flag values.. |
| * clone(NONE), clone(CLONE_NEWIPC), or unshare(CLONE_NEWIPC) |
| * In cloned process, try to access the created semaphore |
| * Test PASS: If the semaphore is readable when flag is None. |
| * Test FAIL: If the semaphore is readable when flag is Unshare or Clone. |
| ***************************************************************************/ |
| |
| #define _GNU_SOURCE 1 |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <string.h> |
| #include <sys/ipc.h> |
| #include <sys/sem.h> |
| #include <libclone.h> |
| #include "test.h" |
| #include "ipcns_helper.h" |
| |
| #define MY_KEY 154326L |
| #define UNSHARESTR "unshare" |
| #define CLONESTR "clone" |
| #define NONESTR "none" |
| |
| char *TCID = "sem_nstest"; |
| int TST_TOTAL = 1; |
| int p1[2]; |
| int p2[2]; |
| |
| int check_semaphore(void *vtest) |
| { |
| char buf[3]; |
| int id; |
| |
| (void) vtest; |
| |
| close(p1[1]); |
| close(p2[0]); |
| |
| read(p1[0], buf, 3); |
| id = semget(MY_KEY, 1, 0); |
| if (id == -1) |
| write(p2[1], "notfnd", 7); |
| else { |
| write(p2[1], "exists", 7); |
| tst_resm(TINFO, "PID %d: Fetched existing semaphore..id = %d", |
| getpid(), id); |
| } |
| tst_exit(); |
| } |
| |
| static void setup(void) |
| { |
| tst_require_root(NULL); |
| check_newipc(); |
| } |
| |
| int main(int argc, char *argv[]) |
| { |
| int ret, use_clone = T_NONE, id; |
| char *tsttype = NONESTR; |
| char buf[7]; |
| |
| setup(); |
| |
| if (argc != 2) { |
| tst_resm(TFAIL, "Usage: %s <clone| unshare| none>", argv[0]); |
| tst_resm(TFAIL, " where clone, unshare, or fork specifies" |
| " unshare method."); |
| tst_exit(); |
| } |
| |
| /* Using PIPE's to sync between container and Parent */ |
| if (pipe(p1) == -1) { |
| perror("pipe"); |
| exit(EXIT_FAILURE); |
| } |
| if (pipe(p2) == -1) { |
| perror("pipe"); |
| exit(EXIT_FAILURE); |
| } |
| |
| if (strcmp(argv[1], "clone") == 0) { |
| use_clone = T_CLONE; |
| tsttype = CLONESTR; |
| } else if (strcmp(argv[1], "unshare") == 0) { |
| use_clone = T_UNSHARE; |
| tsttype = UNSHARESTR; |
| } |
| |
| /* 1. Create (or fetch if existing) the binary semaphore */ |
| id = semget(MY_KEY, 1, IPC_CREAT | IPC_EXCL | 0666); |
| if (id == -1) { |
| perror("Semaphore create"); |
| if (errno != EEXIST) { |
| perror("semget failure"); |
| tst_resm(TBROK, "Semaphore creation failed"); |
| tst_exit(); |
| } |
| id = semget(MY_KEY, 1, 0); |
| if (id == -1) { |
| perror("Semaphore create"); |
| tst_resm(TBROK, "Semaphore operation failed"); |
| tst_exit(); |
| } |
| } |
| |
| tst_resm(TINFO, "Semaphore namespaces Isolation test : %s", tsttype); |
| /* fire off the test */ |
| ret = |
| do_clone_unshare_test(use_clone, CLONE_NEWIPC, check_semaphore, |
| NULL); |
| if (ret < 0) { |
| tst_resm(TFAIL, "%s failed", tsttype); |
| tst_exit(); |
| } |
| |
| close(p1[0]); |
| close(p2[1]); |
| write(p1[1], "go", 3); |
| read(p2[0], buf, 7); |
| |
| if (strcmp(buf, "exists") == 0) { |
| if (use_clone == T_NONE) |
| tst_resm(TPASS, "Plain cloned process found semaphore " |
| "inside container"); |
| else |
| tst_resm(TFAIL, |
| "%s: Container init process found semaphore", |
| tsttype); |
| } else { |
| if (use_clone == T_NONE) |
| tst_resm(TFAIL, |
| "Plain cloned process didn't find semaphore"); |
| else |
| tst_resm(TPASS, "%s: Container didn't find semaphore", |
| tsttype); |
| } |
| |
| /* Delete the semaphore */ |
| id = semget(MY_KEY, 1, 0); |
| semctl(id, IPC_RMID, 0); |
| |
| tst_exit(); |
| } |