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NetBSD/tests/kernel/t_sysv.c

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/* $NetBSD: t_sysv.c,v 1.6 2022/05/14 14:02:03 christos Exp $ */
/*-
* Copyright (c) 1999, 2007 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center, and by Andrew Doran.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Test the SVID-compatible Message Queue facility.
*/
#include <atf-c.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <sys/param.h>
#include <sys/sem.h>
#include <sys/shm.h>
#include <sys/wait.h>
volatile int did_sigsys;
void sigsys_handler(int);
key_t get_ftok(int);
void print_msqid_ds(struct msqid_ds *, mode_t);
void receiver(void);
void print_semid_ds(struct semid_ds *, mode_t);
void waiter(void);
void print_shmid_ds(struct shmid_ds *, mode_t);
void sharer(void);
#define MESSAGE_TEXT_LEN 256
struct testmsg {
long mtype;
char mtext[MESSAGE_TEXT_LEN];
};
const char *m1_str = "California is overrated.";
const char *m2_str = "The quick brown fox jumped over the lazy dog.";
size_t pgsize;
#define MTYPE_1 1
#define MTYPE_1_ACK 2
#define MTYPE_2 3
#define MTYPE_2_ACK 4
pid_t child_pid;
key_t msgkey, semkey, shmkey;
int maxloop = 1;
union semun {
int val; /* value for SETVAL */
struct semid_ds *buf; /* buffer for IPC_{STAT,SET} */
u_short *array; /* array for GETALL & SETALL */
};
/* Writes an integer to a file. To be used from the body of the test
* cases below to pass any global identifiers to the cleanup routine. */
static void
write_int(const char *path, const int value)
{
int output;
output = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0600);
ATF_REQUIRE_MSG(output != -1, "Failed to create %s", path);
write(output, &value, sizeof(value));
close(output);
}
/* Reads an integer from a file. To be used from the cleanup routines
* of the test cases below. */
static int
read_int(const char *path)
{
int input, value;
input = open(path, O_RDONLY);
if (input == -1)
return -1;
read(input, &value, sizeof(value));
return value;
}
void
sigsys_handler(int signo)
{
did_sigsys = 1;
}
key_t get_ftok(int id)
{
int fd;
char token_key[64], token_dir[64];
char *tmpdir;
key_t key;
strlcpy(token_key, "/tmp/t_sysv.XXXXXX", sizeof(token_key));
tmpdir = mkdtemp(token_key);
ATF_REQUIRE_MSG(tmpdir != NULL, "mkdtemp() failed: %d", errno);
strlcpy(token_dir, tmpdir, sizeof(token_dir));
strlcpy(token_key, tmpdir, sizeof(token_key));
strlcat(token_key, "/token_key", sizeof(token_key));
/* Create the file, since ftok() requires it to exist! */
fd = open(token_key, O_RDWR | O_CREAT | O_EXCL, 0600);
if (fd == -1) {
rmdir(tmpdir);
atf_tc_fail("open() of temp file failed: %d", errno);
return (key_t)-1;
}
close(fd);
key = ftok(token_key, id);
ATF_REQUIRE_MSG(key != (key_t)-1, "ftok() failed");
ATF_REQUIRE_MSG(unlink(token_key) != -1, "unlink() failed: %d", errno);
ATF_REQUIRE_MSG(rmdir(token_dir) != -1, "rmdir() failed: %d", errno);
return key;
}
ATF_TC_WITH_CLEANUP(msg);
ATF_TC_HEAD(msg, tc)
{
atf_tc_set_md_var(tc, "timeout", "3");
atf_tc_set_md_var(tc, "descr", "Checks sysvmsg passing");
}
ATF_TC_BODY(msg, tc)
{
struct sigaction sa;
struct msqid_ds m_ds;
struct testmsg m;
int sender_msqid;
int loop;
int c_status;
pid_t wait_result;
/*
* Install a SIGSYS handler so that we can exit gracefully if
* System V Message Queue support isn't in the kernel.
*/
did_sigsys = 0;
sa.sa_handler = sigsys_handler;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
ATF_REQUIRE_MSG(sigaction(SIGSYS, &sa, NULL) != -1,
"sigaction SIGSYS: %d", errno);
msgkey = get_ftok(4160);
ATF_REQUIRE_MSG(msgkey != (key_t)-1, "get_ftok failed");
sender_msqid = msgget(msgkey, IPC_CREAT | 0640);
ATF_REQUIRE_MSG(sender_msqid != -1, "msgget: %d", errno);
write_int("sender_msqid", sender_msqid);
if (did_sigsys) {
atf_tc_skip("SYSV Message Queue not supported");
return;
}
ATF_REQUIRE_MSG(msgctl(sender_msqid, IPC_STAT, &m_ds) != -1,
"msgctl IPC_STAT 1: %d", errno);
print_msqid_ds(&m_ds, 0640);
m_ds.msg_perm.mode = (m_ds.msg_perm.mode & ~0777) | 0600;
ATF_REQUIRE_MSG(msgctl(sender_msqid, IPC_SET, &m_ds) != -1,
"msgctl IPC_SET: %d", errno);
memset(&m_ds, 0, sizeof(m_ds));
ATF_REQUIRE_MSG(msgctl(sender_msqid, IPC_STAT, &m_ds) != -1,
"msgctl IPC_STAT 2: %d", errno);
ATF_REQUIRE_MSG((m_ds.msg_perm.mode & 0777) == 0600,
"IPC_SET of mode didn't hold");
print_msqid_ds(&m_ds, 0600);
fflush(stdout);
switch ((child_pid = fork())) {
case -1:
atf_tc_fail("fork: %d", errno);
return;
case 0:
receiver();
break;
default:
break;
}
for (loop = 0; loop < maxloop; loop++) {
/*
* Send the first message to the receiver and wait for the ACK.
*/
m.mtype = MTYPE_1;
strcpy(m.mtext, m1_str);
ATF_REQUIRE_MSG(msgsnd(sender_msqid, &m, MESSAGE_TEXT_LEN,
0) != -1, "sender: msgsnd 1: %d", errno);
ATF_REQUIRE_MSG(msgrcv(sender_msqid, &m, MESSAGE_TEXT_LEN,
MTYPE_1_ACK, 0) == MESSAGE_TEXT_LEN,
"sender: msgrcv 1 ack: %d", errno);
print_msqid_ds(&m_ds, 0600);
/*
* Send the second message to the receiver and wait for the ACK.
*/
m.mtype = MTYPE_2;
strcpy(m.mtext, m2_str);
ATF_REQUIRE_MSG(msgsnd(sender_msqid, &m, MESSAGE_TEXT_LEN, 0)
!= -1, "sender: msgsnd 2: %d", errno);
ATF_REQUIRE_MSG(msgrcv(sender_msqid, &m, MESSAGE_TEXT_LEN,
MTYPE_2_ACK, 0) == MESSAGE_TEXT_LEN,
"sender: msgrcv 2 ack: %d", errno);
}
/*
* Wait for child to finish
*/
wait_result = wait(&c_status);
ATF_REQUIRE_EQ_MSG(wait_result, child_pid, "wait returned %d (%s)",
wait_result, wait_result == -1 ? strerror(errno) : "");
ATF_REQUIRE_MSG(WIFEXITED(c_status), "child abnormal exit: %d (sig %d)",
c_status, WTERMSIG(c_status));
ATF_REQUIRE_EQ_MSG(WEXITSTATUS(c_status), 0, "child status: %d",
WEXITSTATUS(c_status));
ATF_REQUIRE_MSG(msgctl(sender_msqid, IPC_STAT, &m_ds) != -1,
"msgctl IPC_STAT: %d", errno);
print_msqid_ds(&m_ds, 0600);
}
ATF_TC_CLEANUP(msg, tc)
{
int sender_msqid;
/*
* Remove the message queue if it exists.
*/
sender_msqid = read_int("sender_msqid");
if (sender_msqid == -1)
return;
if (msgctl(sender_msqid, IPC_RMID, NULL) == -1)
err(EXIT_FAILURE, "msgctl IPC_RMID");
}
void
print_msqid_ds(struct msqid_ds *mp, mode_t mode)
{
uid_t uid = geteuid();
gid_t gid = getegid();
printf("PERM: uid %d, gid %d, cuid %d, cgid %d, mode 0%o\n",
mp->msg_perm.uid, mp->msg_perm.gid,
mp->msg_perm.cuid, mp->msg_perm.cgid,
mp->msg_perm.mode & 0777);
printf("qnum %lu, qbytes %ju, lspid %d, lrpid %d\n",
mp->msg_qnum, (uintmax_t)mp->msg_qbytes, mp->msg_lspid,
mp->msg_lrpid);
printf("stime: %s", ctime(&mp->msg_stime));
printf("rtime: %s", ctime(&mp->msg_rtime));
printf("ctime: %s", ctime(&mp->msg_ctime));
/*
* Sanity check a few things.
*/
ATF_REQUIRE_MSG(mp->msg_perm.uid == uid && mp->msg_perm.cuid == uid,
"uid mismatch");
ATF_REQUIRE_MSG(mp->msg_perm.gid == gid && mp->msg_perm.cgid == gid,
"gid mismatch");
ATF_REQUIRE_MSG((mp->msg_perm.mode & 0777) == mode, "mode mismatch");
}
void
receiver(void)
{
struct testmsg m;
int msqid, loop;
if ((msqid = msgget(msgkey, 0)) == -1)
err(EXIT_FAILURE, "receiver: msgget");
for (loop = 0; loop < maxloop; loop++) {
/*
* Receive the first message, print it, and send an ACK.
*/
if (msgrcv(msqid, &m, MESSAGE_TEXT_LEN, MTYPE_1, 0)
!= MESSAGE_TEXT_LEN)
err(EXIT_FAILURE, "receiver: msgrcv 1");
printf("%s\n", m.mtext);
if (strcmp(m.mtext, m1_str) != 0)
errx(EXIT_FAILURE,
"receiver: message 1 data isn't correct");
m.mtype = MTYPE_1_ACK;
if (msgsnd(msqid, &m, MESSAGE_TEXT_LEN, 0) == -1)
err(EXIT_FAILURE, "receiver: msgsnd ack 1");
/*
* Receive the second message, print it, and send an ACK.
*/
if (msgrcv(msqid, &m, MESSAGE_TEXT_LEN, MTYPE_2, 0)
!= MESSAGE_TEXT_LEN)
err(EXIT_FAILURE, "receiver: msgrcv 2");
printf("%s\n", m.mtext);
if (strcmp(m.mtext, m2_str) != 0)
errx(EXIT_FAILURE,
"receiver: message 2 data isn't correct");
m.mtype = MTYPE_2_ACK;
if (msgsnd(msqid, &m, MESSAGE_TEXT_LEN, 0) == -1)
err(EXIT_FAILURE, "receiver: msgsnd ack 2");
}
exit(EXIT_SUCCESS);
}
/*
* Test the SVID-compatible Semaphore facility.
*/
ATF_TC_WITH_CLEANUP(sem);
ATF_TC_HEAD(sem, tc)
{
atf_tc_set_md_var(tc, "timeout", "3");
atf_tc_set_md_var(tc, "descr", "Checks sysvmsg passing");
}
ATF_TC_BODY(sem, tc)
{
struct sigaction sa;
union semun sun;
struct semid_ds s_ds;
int sender_semid;
int i;
int c_status;
int child_count;
pid_t wait_result;
/*
* Install a SIGSYS handler so that we can exit gracefully if
* System V Semaphore support isn't in the kernel.
*/
did_sigsys = 0;
sa.sa_handler = sigsys_handler;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
ATF_REQUIRE_MSG(sigaction(SIGSYS, &sa, NULL) != -1,
"sigaction SIGSYS: %d", errno);
semkey = get_ftok(4160);
ATF_REQUIRE_MSG(semkey != (key_t)-1, "get_ftok failed");
sender_semid = semget(semkey, 1, IPC_CREAT | 0640);
ATF_REQUIRE_MSG(sender_semid != -1, "semget: %d", errno);
write_int("sender_semid", sender_semid);
if (did_sigsys) {
atf_tc_skip("SYSV Semaphore not supported");
return;
}
sun.buf = &s_ds;
ATF_REQUIRE_MSG(semctl(sender_semid, 0, IPC_STAT, sun) != -1,
"semctl IPC_STAT: %d", errno);
print_semid_ds(&s_ds, 0640);
s_ds.sem_perm.mode = (s_ds.sem_perm.mode & ~0777) | 0600;
sun.buf = &s_ds;
ATF_REQUIRE_MSG(semctl(sender_semid, 0, IPC_SET, sun) != -1,
"semctl IPC_SET: %d", errno);
memset(&s_ds, 0, sizeof(s_ds));
sun.buf = &s_ds;
ATF_REQUIRE_MSG(semctl(sender_semid, 0, IPC_STAT, sun) != -1,
"semctl IPC_STAT: %d", errno);
ATF_REQUIRE_MSG((s_ds.sem_perm.mode & 0777) == 0600,
"IPC_SET of mode didn't hold");
print_semid_ds(&s_ds, 0600);
fflush(stdout);
for (child_count = 0; child_count < 5; child_count++) {
switch ((child_pid = fork())) {
case -1:
atf_tc_fail("fork: %d", errno);
return;
case 0:
waiter();
break;
default:
break;
}
}
/*
* Wait for all of the waiters to be attempting to acquire the
* semaphore.
*/
for (;;) {
i = semctl(sender_semid, 0, GETNCNT);
if (i == -1)
atf_tc_fail("semctl GETNCNT: %d", i);
if (i == 5)
break;
}
/*
* Now set the thundering herd in motion by initializing the
* semaphore to the value 1.
*/
sun.val = 1;
ATF_REQUIRE_MSG(semctl(sender_semid, 0, SETVAL, sun) != -1,
"sender: semctl SETVAL to 1: %d", errno);
/*
* Wait for all children to finish
*/
while (child_count-- > 0) {
wait_result = wait(&c_status);
ATF_REQUIRE_MSG(wait_result != -1, "wait failed: %s",
strerror(errno));
ATF_REQUIRE_MSG(WIFEXITED(c_status),
"child abnormal exit: %d (sig %d)",
c_status, WTERMSIG(c_status));
ATF_REQUIRE_EQ_MSG(WEXITSTATUS(c_status), 0, "child status: %d",
WEXITSTATUS(c_status));
sun.buf = &s_ds;
ATF_REQUIRE_MSG(semctl(sender_semid, 0, IPC_STAT, sun) != -1,
"semctl IPC_STAT: %d", errno);
print_semid_ds(&s_ds, 0600);
}
}
ATF_TC_CLEANUP(sem, tc)
{
int sender_semid;
/*
* Remove the semaphore if it exists
*/
sender_semid = read_int("sender_semid");
if (sender_semid == -1)
return;
if (semctl(sender_semid, 0, IPC_RMID) == -1)
err(EXIT_FAILURE, "semctl IPC_RMID");
}
void
print_semid_ds(struct semid_ds *sp, mode_t mode)
{
uid_t uid = geteuid();
gid_t gid = getegid();
printf("PERM: uid %d, gid %d, cuid %d, cgid %d, mode 0%o\n",
sp->sem_perm.uid, sp->sem_perm.gid,
sp->sem_perm.cuid, sp->sem_perm.cgid,
sp->sem_perm.mode & 0777);
printf("nsems %u\n", sp->sem_nsems);
printf("otime: %s", ctime(&sp->sem_otime));
printf("ctime: %s", ctime(&sp->sem_ctime));
/*
* Sanity check a few things.
*/
ATF_REQUIRE_MSG(sp->sem_perm.uid == uid && sp->sem_perm.cuid == uid,
"uid mismatch");
ATF_REQUIRE_MSG(sp->sem_perm.gid == gid && sp->sem_perm.cgid == gid,
"gid mismatch");
ATF_REQUIRE_MSG((sp->sem_perm.mode & 0777) == mode,
"mode mismatch %o != %o", (sp->sem_perm.mode & 0777), mode);
}
void
waiter(void)
{
struct sembuf s;
int semid;
if ((semid = semget(semkey, 1, 0)) == -1)
err(EXIT_FAILURE, "waiter: semget");
/*
* Attempt to acquire the semaphore.
*/
s.sem_num = 0;
s.sem_op = -1;
s.sem_flg = SEM_UNDO;
if (semop(semid, &s, 1) == -1)
err(EXIT_FAILURE, "waiter: semop -1");
printf("WOO! GOT THE SEMAPHORE!\n");
usleep(10000);
/*
* Release the semaphore and exit.
*/
s.sem_num = 0;
s.sem_op = 1;
s.sem_flg = SEM_UNDO;
if (semop(semid, &s, 1) == -1)
err(EXIT_FAILURE, "waiter: semop +1");
exit(EXIT_SUCCESS);
}
/*
* Test the SVID-compatible Shared Memory facility.
*/
ATF_TC_WITH_CLEANUP(shm);
ATF_TC_HEAD(shm, tc)
{
atf_tc_set_md_var(tc, "timeout", "3");
atf_tc_set_md_var(tc, "descr", "Checks sysv shared memory");
}
ATF_TC_BODY(shm, tc)
{
struct sigaction sa;
struct shmid_ds s_ds;
char *shm_buf;
int sender_shmid;
int c_status;
pid_t wait_result;
/*
* Install a SIGSYS handler so that we can exit gracefully if
* System V Shared Memory support isn't in the kernel.
*/
did_sigsys = 0;
sa.sa_handler = sigsys_handler;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
ATF_REQUIRE_MSG(sigaction(SIGSYS, &sa, NULL) != -1,
"sigaction SIGSYS: %d", errno);
pgsize = sysconf(_SC_PAGESIZE);
shmkey = get_ftok(4160);
ATF_REQUIRE_MSG(shmkey != (key_t)-1, "get_ftok failed");
ATF_REQUIRE_MSG((sender_shmid = shmget(shmkey, pgsize,
IPC_CREAT | 0640)) != -1,
"shmget: %d", errno);
write_int("sender_shmid", sender_shmid);
ATF_REQUIRE_MSG(shmctl(sender_shmid, IPC_STAT, &s_ds) != -1,
"shmctl IPC_STAT: %d", errno);
print_shmid_ds(&s_ds, 0640);
s_ds.shm_perm.mode = (s_ds.shm_perm.mode & ~0777) | 0600;
ATF_REQUIRE_MSG(shmctl(sender_shmid, IPC_SET, &s_ds) != -1,
"shmctl IPC_SET: %d", errno);
memset(&s_ds, 0, sizeof(s_ds));
ATF_REQUIRE_MSG(shmctl(sender_shmid, IPC_STAT, &s_ds) != -1,
"shmctl IPC_STAT: %d", errno);
ATF_REQUIRE_MSG((s_ds.shm_perm.mode & 0777) == 0600,
"IPC_SET of mode didn't hold");
print_shmid_ds(&s_ds, 0600);
shm_buf = shmat(sender_shmid, NULL, 0);
ATF_REQUIRE_MSG(shm_buf != (void *) -1, "sender: shmat: %d", errno);
/*
* Write the test pattern into the shared memory buffer.
*/
strcpy(shm_buf, m2_str);
fflush(stdout);
switch ((child_pid = fork())) {
case -1:
atf_tc_fail("fork: %d", errno);
return;
case 0:
sharer();
break;
default:
break;
}
/*
* Wait for child to finish
*/
wait_result = wait(&c_status);
ATF_REQUIRE_EQ_MSG(wait_result, child_pid, "wait returned %d (%s)",
wait_result, wait_result == -1 ? strerror(errno) : "");
ATF_REQUIRE_MSG(WIFEXITED(c_status), "child abnormal exit: %d (sig %d)",
c_status, WTERMSIG(c_status));
ATF_REQUIRE_EQ_MSG(WEXITSTATUS(c_status), 0, "child status: %d",
WEXITSTATUS(c_status));
ATF_REQUIRE_MSG(shmctl(sender_shmid, IPC_STAT, &s_ds) != -1,
"shmctl IPC_STAT: %d", errno);
print_shmid_ds(&s_ds, 0600);
}
ATF_TC_CLEANUP(shm, tc)
{
int sender_shmid;
/*
* Remove the shared memory area if it exists.
*/
sender_shmid = read_int("sender_shmid");
if (sender_shmid == -1)
return;
if (shmctl(sender_shmid, IPC_RMID, NULL) == -1)
err(EXIT_FAILURE, "shmctl IPC_RMID");
}
void
print_shmid_ds(struct shmid_ds *sp, mode_t mode)
{
uid_t uid = geteuid();
gid_t gid = getegid();
printf("PERM: uid %d, gid %d, cuid %d, cgid %d, mode 0%o\n",
sp->shm_perm.uid, sp->shm_perm.gid,
sp->shm_perm.cuid, sp->shm_perm.cgid,
sp->shm_perm.mode & 0777);
printf("segsz %ju, lpid %d, cpid %d, nattch %u\n",
(uintmax_t)sp->shm_segsz, sp->shm_lpid, sp->shm_cpid,
sp->shm_nattch);
printf("atime: %s", ctime(&sp->shm_atime));
printf("dtime: %s", ctime(&sp->shm_dtime));
printf("ctime: %s", ctime(&sp->shm_ctime));
/*
* Sanity check a few things.
*/
ATF_REQUIRE_MSG(sp->shm_perm.uid == uid && sp->shm_perm.cuid == uid,
"uid mismatch");
ATF_REQUIRE_MSG(sp->shm_perm.gid == gid && sp->shm_perm.cgid == gid,
"gid mismatch");
ATF_REQUIRE_MSG((sp->shm_perm.mode & 0777) == mode,
"mode mismatch %o != %o", sp->shm_perm.mode & 0777, mode);
}
void
sharer(void)
{
int shmid;
void *shm_buf;
shmid = shmget(shmkey, pgsize, 0);
if (shmid == -1)
err(EXIT_FAILURE, "receiver: shmget");
shm_buf = shmat(shmid, NULL, 0);
if (shm_buf == (void *) -1)
err(EXIT_FAILURE, "receiver: shmat");
printf("%s\n", (const char *)shm_buf);
if (strcmp((const char *)shm_buf, m2_str) != 0)
errx(EXIT_FAILURE, "receiver: data isn't correct");
exit(EXIT_SUCCESS);
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, msg);
ATF_TP_ADD_TC(tp, sem);
ATF_TP_ADD_TC(tp, shm);
return atf_no_error();
}
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