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08-25-2008
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message queues
#include <sys/ipc.h>
#include <sys/msg.h> int main() { int qid; int t; struct msgbuf mesg; qid=msgget(IPC_PRIVATE,IPC_CREAT); mesg.mtype=1L; mesg.mtext[0]=1; t=msgsnd(qid,&mesg,1,0); printf("%d",t); } the program prints -1 as the result of msgsnd ,which means that msgsnd doesn't work...any ideas?? |
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