pipa 2stronna

#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <pthread.h>

void* thinput(void* input)
{
    char b;
    while (1)
    {
        read((int)input,&b,1);
        write(0,&b,1);
    }
}

void* thoutput(void* output)
{
    char b;
    while (1)
    {
        read(1,&b,1);
        write((int)output,&b,1);
    }
}

int main(int argc, char** argv)
{
    int fdin[2],fdout[2];

    if (argc==3) //xterm child
    {
        int input=atoi(argv[2]);
        int output=atoi(argv[1]);
        printf("input: %d | output: %d\n",input,output);
        pthread_t t1,t2;

        pthread_create(&t1,NULL,&thinput,(void*)input);
        pthread_create(&t1,NULL,&thoutput,(void*)output);
        while (1);
    }

    pipe(fdin);
    pipe(fdout);

    if (fork()>0) //parent
    {
        printf("pt:R:%d W:%d | R:%d W:%d\n",fdin[0],fdin[1],fdout[0],fdout[1]);
        pthread_t t1,t2;
        pthread_create(&t1,NULL,thinput,(void*)fdin[0]);
        pthread_create(&t1,NULL,thoutput,(void*)fdout[1]);
        while (1);
    }
    else //child
    {
        char argbuf[30],buf2[30];
        sprintf(argbuf,"%d",fdin[1]);
        sprintf(buf2,"%d",fdout[0]);
        execlp("/usr/bin/xterm","xterm","-e",argv[0],argbuf,buf2,(char*)0);
    }
}