server.c

linux下面的文件锁和信号量的程序

/*
	File:server.c
	Description:server end of program for message queue test
	Author:Luke Huang
	Data:Jun.17 2002
*/

#include "key.h"

int main(int argc,char ** argv){
	key_t key;
	int mq_id;
	Message * p_message=calloc(1,sizeof(Message));;
	if(argc!=2){
		printf("you should give some parameter!\n");
		exit(1);
	}
	key=ftok(KEYPATH,KEYID);
	if((mq_id=msgget(key,KEYPERM|IPC_CREAT))==-1){
		perror("could not open the message queue!\n");
		exit(2);
	}
	printf("message queue id %x\n",mq_id);
	p_message->mtype=1;
	p_message->index=1;
	strcpy(p_message->message,argv[1]);
	msgsnd(mq_id,p_message,sizeof(Message),0);
	exit(0);
}

/* END OF FILE:server.c */