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server.c
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server.c
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#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <errno.h>
#include <unistd.h>
extern int errno;
#define lientKey 1234
static int gs_nClientMsgid = -1;
typedef struct stu_msgbuf_s
{
long msgtype;
char msgtext[1024];
}stu_msgbuf_t;
int rcvmsg(int msgid,const char * pchBuf, int len, int nMsgType)
{
stu_msgbuf_t stuSendMsg = {0};
int ret = -1;
stuSendMsg.msgtype = nMsgType;
ret = msgrcv(msgid, &stuSendMsg, sizeof(stuSendMsg.msgtext), stuSendMsg.msgtype ,IPC_NOWAIT);
if(-1 == ret)
{
printf("\n msgrcvg s_nClientMsgid [%d] errno=%d [%s]\n", msgid ,errno,strerror(errno));
return -1;
}
else
{
printf("\n msgrcv [%s]\n",stuSendMsg.msgtext);
}
return 0;
}
int init(int *pMsgId)
{
int msgid = -1;
key_t ktmp = ftok("/etc/passwd",lientKey);
if(ktmp == -1)
{
printf("\n if(ktmp == -1) errno=%d [%s]\n",errno,strerror(errno));
return -1;
}
else
{
printf("\n ftok ktmp[%d]\n",ktmp);
}
msgid = msgget(ktmp, 0666|IPC_CREAT);
if(msgid < 0)
{
printf("\n if(gs_nClientMsgid == -1) errno=%d [%s]\n",errno,strerror(errno));
return -1;
}
printf("\n msgget sucess %d ktmp[%d]\n",msgid,ktmp);
*pMsgId = msgid;
return 0;
}
int main()
{
int ret =-1;
int msgid =-1;
ret = init(&msgid);
if(ret == -1)
{
return 0;
}
while(1)
{
char chStr[20] = {0};
int msgtype = 2;
//printf("\ni[%d]\n",i);
//snprintf(chStr,sizeof(chStr),"%d --- %ld",i,time(NULL));
rcvmsg(msgid,chStr, strlen(chStr)+1,msgtype);
sleep(2);
}
}