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 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);
}
/* include bw_svmsg2 */
void
writer(int contfd, int msqid)
{
int ntowrite;
for ( ; ; ) {
Read(contfd, &ntowrite, sizeof(ntowrite));
while (ntowrite > 0) {
Msgsnd(msqid, buf, xfersize - sizeof(long), 0);
ntowrite -= xfersize;
}
}
}
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 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);
}
