uname()

//filename:uname.c
//Functions gethostname getdomainname are similar with it
#include
#include
#include

int main(int argc,char *argv[])
{
        int s;
        struct utsname buf;
        s=uname(&buf);
        if(s<0)
        {
                perror("uname error");
                exit(1);
        }

        printf("sysname:%s/nnodename:%s/nrelease:%s/nversion:%s/nmachine:%s/n",buf.sysname,buf.nodename,buf.release,buf.version,buf.machine);

        return 0;
}