嵌入式设备中实现ping功能代码

int NetPing(char *server_ip)
{
pid_t pid;
int i = 0;
int stat;
const int loopCnt = 3; //ping 3 times

while(i < loopCnt)
{
if((pid = vfork()) < 0)
{
RPT(RPT_ERR, "vfork error!");
return -1;
}
else if(pid == 0)
{
if( execlp("ping", "ping", "-c", "1","-W", "3", server_ip, (char *)0) < 0)
{
RPT(RPT_ERR, "execlp 'ping -c 1 %s' error!", server_ip);
return -1;
}
}

waitpid(pid , &stat, WUNTRACED);
if (stat == 0)
{
RPT(RPT_INF, "ping successful pid=%d", pid);
return 0;
}
else
{
RPT(RPT_ERR, "ping error!, can not connect to %s", server_ip);
}

mssleep(50);
i++;
}

return -1;
}