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);
}
ssize_t RcvStandardMessage(type_t type) {
CLEAR(standardMessage);
int x = Msgrcv(SERVER_QUEUE_ID, &standardMessage, sizeof(standardMessage), type, IPC_NOWAIT);
if (x > 0) {
Printf("Recieved standard message of type %s [%s]", GetMessageType(type), standardMessage.content.sender);
}
return x;
}
ssize_t Rcv(void *structure, int size, long type) {
memset(structure, 0, size);
ssize_t x = Msgrcv(SERVER_QUEUE_ID, structure, size, type, IPC_NOWAIT);
if (x > 0) {
Printf("Recieved special message of type %s", GetMessageType(type));
}
return x;
}
ssize_t RcvCompactMessage(type_t type) {
// printf("Recieving meessage of type %d, queue id is %d\n", type, SERVER_QUEUE_ID);
CLEAR(compactMessage);
ssize_t x = Msgrcv(SERVER_QUEUE_ID, &compactMessage, sizeof(compactMessage), type, IPC_NOWAIT);
if (x > 0) {
Printf("Recieved compact message of type %s [%s]", GetMessageType(type), compactMessage.content.sender);
}
return x;
}
void
reader(int contfd, int msqid, int nbytes)
{
ssize_t n;
Write(contfd, &nbytes, sizeof(nbytes));
while ((nbytes > 0) &&
( (n = Msgrcv(msqid, buf, xfersize - sizeof(long), 0, 0)) > 0)) {
nbytes -= n + sizeof(long);
}
}
ssize_t RcvHeartBeat() {
CLEAR(compactMessage);
ssize_t x = Msgrcv(SERVER_QUEUE_ID, &compactMessage, sizeof(compactMessage), MSG_HEARTBEAT, IPC_NOWAIT);
if (x > 0) {
Printf("Recieved compact message of type %s [%s]", GetMessageType(MSG_HEARTBEAT), compactMessage.content.sender);
}
else if (x < 0) {
int errno;
if (errno == ENOMSG) return 0;
Error("Error on hearbeat");
}
return x;
}
int main(int argc, char **argv)
{
int mqid;
ssize_t n;
struct msgbuf *buff;
if (argc != 2)
err_quit("Usage: rcv2 <mqid>");
mqid = atoi(argv[1]);
buff = (struct msgbuf *)Malloc(MAXMSG);
n = Msgrcv(mqid, buff, MAXMSG, 0, 0);
printf("read %d bytes, type = %ld\n", n, buff->mtype);
exit(0);
}
