2 * Copyright (c) 1999 The NetBSD Foundation, Inc.
5 * This code is derived from software contributed to The NetBSD Foundation
6 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
7 * NASA Ames Research Center.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the NetBSD
20 * Foundation, Inc. and its contributors.
21 * 4. Neither the name of The NetBSD Foundation nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
26 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
37 * Obtained from: $NetBSD: shmtest.c,v 1.3 2002/07/20 08:36:26 grant Exp $
41 * Test the SVID-compatible Shared Memory facility.
44 #include <sys/param.h>
58 void print_shmid_ds (struct shmid_ds *, mode_t);
59 void sigsys_handler (int);
60 void sigchld_handler (int);
65 const char *m_str = "The quick brown fox jumped over the lazy dog.";
67 int sender_shmid = -1;
88 * Install a SIGSYS handler so that we can exit gracefully if
89 * System V Shared Memory support isn't in the kernel.
91 sa.sa_handler = sigsys_handler;
92 sigemptyset(&sa.sa_mask);
94 if (sigaction(SIGSYS, &sa, NULL) == -1)
95 err(1, "sigaction SIGSYS");
98 * Install and SIGCHLD handler to deal with all possible exit
99 * conditions of the receiver.
101 sa.sa_handler = sigchld_handler;
102 sigemptyset(&sa.sa_mask);
104 if (sigaction(SIGCHLD, &sa, NULL) == -1)
105 err(1, "sigaction SIGCHLD");
107 pgsize = sysconf(_SC_PAGESIZE);
109 shmkey = ftok(argv[1], 4160);
112 * Initialize child_pid to ourselves to that the cleanup function
113 * works before we create the receiver.
115 child_pid = getpid();
118 * Make sure that when the sender exits, the message queue is
121 if (atexit(cleanup) == -1)
124 if ((sender_shmid = shmget(shmkey, pgsize, IPC_CREAT | 0640)) == -1)
127 if (shmctl(sender_shmid, IPC_STAT, &s_ds) == -1)
128 err(1, "shmctl IPC_STAT");
130 print_shmid_ds(&s_ds, 0640);
132 s_ds.shm_perm.mode = (s_ds.shm_perm.mode & ~0777) | 0600;
134 if (shmctl(sender_shmid, IPC_SET, &s_ds) == -1)
135 err(1, "shmctl IPC_SET");
137 memset(&s_ds, 0, sizeof(s_ds));
139 if (shmctl(sender_shmid, IPC_STAT, &s_ds) == -1)
140 err(1, "shmctl IPC_STAT");
142 if ((s_ds.shm_perm.mode & 0777) != 0600)
143 err(1, "IPC_SET of mode didn't hold");
145 print_shmid_ds(&s_ds, 0600);
147 if ((shm_buf = shmat(sender_shmid, NULL, 0)) == (void *) -1)
148 err(1, "sender: shmat");
151 * Write the test pattern into the shared memory buffer.
153 strcpy(shm_buf, m_str);
155 switch ((child_pid = fork())) {
169 * Suspend forever; when we get SIGCHLD, the handler will exit.
171 sigemptyset(&sigmask);
172 (void) sigsuspend(&sigmask);
175 * ...and any other signal is an unexpected error.
177 errx(1, "sender: received unexpected signal");
181 sigsys_handler(signo)
185 errx(1, "System V Shared Memory support is not present in the kernel");
189 sigchld_handler(signo)
192 struct shmid_ds s_ds;
196 * Reap the child; if it exited successfully, then the test passed!
198 if (waitpid(child_pid, &cstatus, 0) != child_pid)
201 if (WIFEXITED(cstatus) == 0)
202 errx(1, "receiver exited abnormally");
204 if (WEXITSTATUS(cstatus) != 0)
205 errx(1, "receiver exited with status %d",
206 WEXITSTATUS(cstatus));
209 * If we get here, the child has exited normally, and thus
210 * we should exit normally too. First, tho, we print out
211 * the final stats for the message queue.
214 if (shmctl(sender_shmid, IPC_STAT, &s_ds) == -1)
215 err(1, "shmctl IPC_STAT");
217 print_shmid_ds(&s_ds, 0600);
227 * If we're the sender, and it exists, remove the shared memory area.
229 if (child_pid != 0 && sender_shmid != -1) {
230 if (shmctl(sender_shmid, IPC_RMID, NULL) == -1)
231 warn("shmctl IPC_RMID");
236 print_shmid_ds(sp, mode)
240 uid_t uid = geteuid();
241 gid_t gid = getegid();
243 printf("PERM: uid %d, gid %d, cuid %d, cgid %d, mode 0%o\n",
244 sp->shm_perm.uid, sp->shm_perm.gid,
245 sp->shm_perm.cuid, sp->shm_perm.cgid,
246 sp->shm_perm.mode & 0777);
248 printf("segsz %lu, lpid %d, cpid %d, nattch %u\n",
249 (u_long)sp->shm_segsz, sp->shm_lpid, sp->shm_cpid,
252 printf("atime: %s", ctime(&sp->shm_atime));
253 printf("dtime: %s", ctime(&sp->shm_dtime));
254 printf("ctime: %s", ctime(&sp->shm_ctime));
257 * Sanity check a few things.
260 if (sp->shm_perm.uid != uid || sp->shm_perm.cuid != uid)
261 errx(1, "uid mismatch");
263 if (sp->shm_perm.gid != gid || sp->shm_perm.cgid != gid)
264 errx(1, "gid mismatch");
266 if ((sp->shm_perm.mode & 0777) != mode)
267 errx(1, "mode mismatch");
274 fprintf(stderr, "usage: %s keypath\n", getprogname());
284 if ((shmid = shmget(shmkey, pgsize, 0)) == -1)
285 err(1, "receiver: shmget");
287 if ((shm_buf = shmat(shmid, NULL, 0)) == (void *) -1)
288 err(1, "receiver: shmat");
290 printf("%s\n", (const char *)shm_buf);
291 if (strcmp((const char *)shm_buf, m_str) != 0)
292 err(1, "receiver: data isn't correct");