int
main(int argc, char **argv)
{
int readid, writeid;
readid = Msgget(MQ_KEY1, SVMSG_MODE | IPC_CREAT);
writeid = Msgget(MQ_KEY2, SVMSG_MODE | IPC_CREAT);
server(readid, writeid);
exit(0);
}
int
main(int argc, char **argv)
{
int c, flag, mqid;
long type;
ssize_t n;
struct msgbuf *buff;
type = flag = 0;
while ( (c = Getopt(argc, argv, "nt:")) != -1) {
switch (c) {
case 'n':
flag |= IPC_NOWAIT;
break;
case 't':
type = atol(optarg);
break;
}
}
if (optind != argc - 1)
err_quit("usage: msgrcv [ -n ] [ -t type ] <pathname>");
mqid = Msgget(Ftok(argv[optind], 0), MSG_R);
buff = Malloc(MAXMSG);
n = Msgrcv(mqid, buff, MAXMSG, type, flag);
printf("read %d bytes, type = %ld\n", n, buff->mtype);
exit(0);
}
int main(int argc, char **argv)
{
int msqid;
msqid = Msgget(MQ_KEY1, SVMSG_MODE | IPC_CREAT);
server(msqid, msqid);
exit(0);
}
int main(int argc, char **argv)
{
int msqid;
msqid = Msgget(MQ_KEY1, 0);
client(msqid, msqid);
exit(0);
}
int
main(int argc, char **argv)
{
int msqid;
struct msqid_ds info;
struct msgbuf buf;
msqid = Msgget(IPC_PRIVATE, SVMSG_MODE | IPC_CREAT);
buf.mtype = 1;
buf.mtext[0] = 1;
Msgsnd(msqid, &buf, 1, 0);
Msgctl(msqid, IPC_STAT, &info);
printf("read-write: %03o, cbytes = %lu, qnum = %lu, qbytes = %lu\n",
info.msg_perm.mode & 0777, (unsigned long int) info.msg_cbytes,
(unsigned long int ) info.msg_qnum, (unsigned long int) info.msg_qbytes);
int ret = system("ipcs -q");
if( ret == -1){
perror("system\n");
printf("Error in system call\n");
}
Msgctl(msqid, IPC_RMID, NULL);
exit(0);
}
int
main(int argc, char **argv)
{
int i, nloop, contpipe[2], msqid;
pid_t childpid;
if (argc != 4)
err_quit("usage: bw_svmsg <#loops> <#mbytes> <#bytes/write>");
nloop = atoi(argv[1]);
totalnbytes = atoi(argv[2]) * 1024 * 1024;
xfersize = atoi(argv[3]);
buf = Valloc(xfersize);
Touch(buf, xfersize);
buf->mtype = 1;
Pipe(contpipe);
msqid = Msgget(IPC_PRIVATE, IPC_CREAT | SVMSG_MODE);
if ( (childpid = Fork()) == 0) {
writer(contpipe[0], msqid); /* child */
exit(0);
}
Start_time();
for (i = 0; i < nloop; i++)
reader(contpipe[1], msqid, totalnbytes);
printf("bandwidth: %.3f MB/sec\n",
totalnbytes / Stop_time() * nloop);
kill(childpid, SIGTERM);
Msgctl(msqid, IPC_RMID, NULL);
exit(0);
}
int main(int argc, char *argv[])
{
int readid, writeid;
key_t Rkey, Wkey;
Rkey = Ftok("/tmp/msg", 0);
Wkey = Ftok("/tmp/msg2", 0);
readid = Msgget(Rkey, 0644 | IPC_CREAT);
writeid = Msgget(Wkey, 0644 | IPC_CREAT);
server(readid, writeid);
exit(EXIT_FAILURE);
}
int
main(int argc, char **argv)
{
int readid, writeid;
/* 4assumes server has created the queues */
writeid = Msgget(MQ_KEY1, 0);
readid = Msgget(MQ_KEY2, 0);
client(readid, writeid);
/* 4now we can delete the queues */
Msgctl(readid, IPC_RMID, NULL);
Msgctl(writeid, IPC_RMID, NULL);
exit(0);
}
int
main(int argc, char **argv)
{
int readid, writeid;
/* server must create its well-known queue */
writeid = Msgget(MQ_KEY1, 0);
/* we create our own private queue, and in client() we tranport our queue id to server */
readid = Msgget(IPC_PRIVATE, SVMSG_MODE | IPC_CREAT);
client(readid, writeid);
/* work done , and delete our private queue */
Msgctl(readid, IPC_RMID, NULL);
exit(0);
}
int Snd(int dest, void *structure, int size) {
dest = Msgget(dest, 0);
if (dest == -1) {
return -1;
}
Printf2("Sending special message to %d", dest);
return Msgsnd(dest, structure, size, 0);
}
int
main(int argc, char **argv)
{
int msqid;
/* 4server must create the queue */
msqid = Msgget(MQ_KEY1, 0);
client(msqid, msqid); /* same queue for both directions */
exit(0);
}
int main(int argc, char **argv)
{
int mqid;
if (argc != 2)
err_quit("Usage: rmid <pathname>");
mqid = Msgget(Ftok(argv[1], 0), 0);
Msgctl(mqid, IPC_RMID, NULL);
exit(0);
}
int
main(int argc, char **argv)
{
int i, msqid;
for (i = 0; i < 10; i++) {
msqid = Msgget(IPC_PRIVATE, SVMSG_MODE | IPC_CREAT);
printf("msqid = %d\n", msqid);
Msgctl(msqid, IPC_RMID, NULL);
}
exit(0);
}
int SndCompactMessage(int dest, type_t type, int value, int id) {
Printf2("Sending compact message to %d of type %ld", dest, type);
dest = Msgget(dest, 0);
if (dest == -1) {
return -1;
}
CLEAR(compactMessage);
compactMessage.type = type;
compactMessage.content.value = value;
compactMessage.content.id = (id == -1) ? GetMessageID() : id;
return Msgsnd(dest, &compactMessage, sizeof(compactMessage), 0);
}
int
main(int argc, char **argv)
{
int c, oflag, mqid;
oflag = SVMSG_MODE | IPC_CREAT;
while ( (c = Getopt(argc, argv, "e")) != -1) {
switch (c) {
case 'e':
oflag |= IPC_EXCL;
break;
}
}
if (optind != argc - 1)
err_quit("usage: msgcreate [ -e ] <pathname>");
mqid = Msgget(Ftok(argv[optind], 0), oflag);
exit(0);
}
int main(int argc, char **argv)
{
int msqid;
struct msqid_ds info;
struct msgbuf buf;
msqid = Msgget(IPC_PRIVATE, IPC_CREAT | SVMSG_MODE);
buf.mtype = 1;
buf.mtext[0] = 1;
Msgsnd(msqid, &buf, 1, 0);
Msgctl(msqid, IPC_STAT, &info);
printf("read-write: %03o, cbytes = %lu, qnum = %lu, qbytes = %lu\n", info.msg_perm.mode & 0777, (ulong) info.msg_cbytes, (ulong) info.msg_qnum, (ulong) info.msg_qbytes);
system("ipcs -q");
Msgctl(msqid, IPC_RMID, NULL);
exit(0);
}
int main(int argc, char **argv)
{
int mqid;
size_t len;
long type;
struct msgbuf *ptr;
if (argc != 4)
err_quit("Usage: msgsnd <pathname> <#bytes> <type>");
len = atoi(argv[2]);
type = atoi(argv[3]);
mqid = Msgget(Ftok(argv[1], 0), MSG_W);
ptr = (struct msgbuf *)Calloc(sizeof(long) + len, sizeof(char));
ptr->mtype = type;
Msgsnd(mqid, ptr, len, 0);
exit(0);
}
