1 /* 2 * Copyright (c) International Business Machines Corp., 2007 3 * This program is free software; you can redistribute it and/or modify 4 * it under the terms of the GNU General Public License as published by 5 * the Free Software Foundation; either version 2 of the License, or 6 * (at your option) any later version. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 11 * the GNU General Public License for more details. 12 * You should have received a copy of the GNU General Public License 13 * along with this program; if not, write to the Free Software 14 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 15 * 16 * Author: Serge Hallyn <serue (at) us.ibm.com> 17 * 18 * Create shm with key 0xEAEAEA 19 * clone, clone(CLONE_NEWIPC), or unshare(CLONE_NEWIPC) 20 * In cloned process, try to get the created shm 21 22 ***************************************************************************/ 23 24 #define _GNU_SOURCE 1 25 #include <sys/wait.h> 26 #include <assert.h> 27 #include <stdio.h> 28 #include <stdlib.h> 29 #include <unistd.h> 30 #include <string.h> 31 #include <errno.h> 32 #include <sys/ipc.h> 33 #include <sys/shm.h> 34 #include "ipcns_helper.h" 35 #include "test.h" 36 37 char *TCID = "sysvipc_namespace"; 38 int TST_TOTAL = 1; 39 #define TESTKEY 0xEAEAEA 40 41 int p1[2]; 42 int p2[2]; 43 44 int check_shmid(void *vtest) 45 { 46 char buf[3]; 47 int id; 48 49 (void) vtest; 50 51 close(p1[1]); 52 close(p2[0]); 53 54 read(p1[0], buf, 3); 55 id = shmget(TESTKEY, 100, 0); 56 if (id == -1) { 57 write(p2[1], "notfnd", 7); 58 } else { 59 write(p2[1], "exists", 7); 60 shmctl(id, IPC_RMID, NULL); 61 } 62 63 tst_exit(); 64 } 65 66 static void setup(void) 67 { 68 tst_require_root(); 69 check_newipc(); 70 } 71 72 #define UNSHARESTR "unshare" 73 #define CLONESTR "clone" 74 #define NONESTR "none" 75 int main(int argc, char *argv[]) 76 { 77 int r, use_clone = T_NONE; 78 int id; 79 char *tsttype = NONESTR; 80 char buf[7]; 81 82 setup(); 83 84 if (argc != 2) { 85 tst_resm(TFAIL, "Usage: %s <clone|unshare|none>", argv[0]); 86 tst_brkm(TFAIL, 87 NULL, 88 " where clone, unshare, or fork specifies unshare method."); 89 } 90 if (pipe(p1) == -1) { 91 perror("pipe"); 92 exit(EXIT_FAILURE); 93 } 94 if (pipe(p2) == -1) { 95 perror("pipe"); 96 exit(EXIT_FAILURE); 97 } 98 tsttype = NONESTR; 99 if (strcmp(argv[1], "clone") == 0) { 100 use_clone = T_CLONE; 101 tsttype = CLONESTR; 102 } else if (strcmp(argv[1], "unshare") == 0) { 103 use_clone = T_UNSHARE; 104 tsttype = UNSHARESTR; 105 } 106 107 /* first create the key */ 108 id = shmget(TESTKEY, 100, IPC_CREAT); 109 if (id == -1) { 110 perror("shmget"); 111 tst_brkm(TFAIL, NULL, "shmget failed"); 112 } 113 114 tst_resm(TINFO, "shmid namespaces test : %s", tsttype); 115 /* fire off the test */ 116 r = do_clone_unshare_test(use_clone, CLONE_NEWIPC, check_shmid, NULL); 117 if (r < 0) { 118 tst_brkm(TFAIL, NULL, "%s failed", tsttype); 119 } 120 121 close(p1[0]); 122 close(p2[1]); 123 write(p1[1], "go", 3); 124 read(p2[0], buf, 7); 125 if (strcmp(buf, "exists") == 0) { 126 if (use_clone == T_NONE) 127 tst_resm(TPASS, "plain cloned process found shmid"); 128 else 129 tst_resm(TFAIL, "%s: child process found shmid", 130 tsttype); 131 } else { 132 if (use_clone == T_NONE) 133 tst_resm(TFAIL, 134 "plain cloned process didn't find shmid"); 135 else 136 tst_resm(TPASS, "%s: child process didn't find shmid", 137 tsttype); 138 } 139 140 /* destroy the key */ 141 shmctl(id, IPC_RMID, NULL); 142 143 tst_exit(); 144 } 145
