LinuxQuestions.org - Need help w/ shell handling 3 commands/2 pipes

I'm trying to write a shell in C that will take 3 commands linked together with 2 pipes. Here's what I have so far but the middle function sees a bad descriptor. Can anyone help?
PHP Code:



 int runPipes3(cmd_type *cmd1, cmd_type *cmd2, cmd_type *cmd3) 
{ 
    int fds1[2]; 
    int fds2[2]; 
    int pid1; 
    int pid2; 
    int pid3; 
    int status; 
    char *pathname1 = getPath(cmd1->argv[0]); 
    char *pathname2 = getPath(cmd2->argv[0]); 
    char *pathname3 = getPath(cmd3->argv[0]); 
 
    if(pipe(fds1) == -1) 
    { 
        printf("ERROR: pipe()\n"); 
        return 1; 
    } 
    if(pipe(fds2) == -1) 
    { 
        printf("ERROR: pipe()\n"); 
        return 1; 
    } 
 
    if((pid1 = fork()) < 0) 
    { 
        printf("ERROR: pipe()\n"); 
        return 1; 
    } 
    if(pid1 == 0) 
    { 
        //3rd process 
        close(fds1[1]); 
        dup2(fds1[0], 0); 
//        close(fds1[0]); 
        execv(pathname3, cmd3->argv); 
        printf("ERROR: execv()\n"); 
        return 1; 
    } 
    else 
    { 
        //parent process 
        //need to fork again, so the shell isn't replaced 
        if((pid2 = fork()) < 0) 
        { 
            printf("ERROR: fork()\n"); 
            return 1; 
        } 
        if(pid2 == 0) 
        { 
//            close(fds2[0]); 
//            close(fds1[1]); 
            dup2(fds2[1], 0); 
            dup2(fds1[0], 1); 
            execv(pathname2, cmd2->argv); 
            printf("ERROR: fork()\n"); 
            return 1; 
        } 
        else 
        { 
            if((pid3 = fork()) < 0) 
            { 
                printf("ERROR: fork()\n"); 
                return 1; 
            } 
            if(pid3 == 0) 
            { 
                //1st process 
                close(fds2[0]); 
                dup2(fds2[1], 1); 
//                 close(fds2[1]); 
                execv(pathname1, cmd1->argv); 
                printf("ERROR: fork()\n"); 
                return 1; 
            } 
            else 
            { 
                //parent process (the shell) 
                close(fds1[0]); 
                close(fds1[1]); 
                close(fds2[0]); 
                close(fds2[1]); 
                if(cmd3->bckgnd == 0) 
                    while(wait(&status) != pid3); 
                if(cmd2->bckgnd == 0) 
                    while(wait(&status) != pid2); 
                if(cmd1->bckgnd == 0) 
                    while(wait(&status) != pid1); 
            } 
        } 
    } 
    return 0; 
}