Doubt in ct_ctl_adopt() of libcontract.so.1

[Sushant Nirwan]

Thanks Antonello
Your concept in 100% correct but now my problem is that how i can make second 
process P2 of a process contract CT
Pls guide me the what change should i do so that i can get another Process 
Code is :
int
activate_template(int parameter)
{
        int             tmpl_fd;
        ctid_t          ctid;


        if ((tmpl_fd = open64("/system/contract/process/template", O_RDWR)) == 
-1) {
                perror("Can't open /system/contract/process/template \n");
                return -1;
        }

         if (ct_pr_tmpl_set_param(tmpl_fd,parameter) != 0) {
                perror("Can't set parameter term as inherit and regent");
                return -1;
        }

        if (ct_tmpl_activate(tmpl_fd) != 0) {
                perror("Can't activate process contract template");
                return -1;
        }

                return tmpl_fd;
}


int adopt_ctid(ctid_t ctid)
{
        char            ctl_path[PATH_MAX];
        ct_stathdl_t    stathdl;
        int             ctl_fd;
        int             pathlen;
        int             stat_fd;


        pathlen = snprintf(ctl_path, PATH_MAX, CTFS_ROOT 
"/process/%ld/ctl",ctid);
        if (pathlen > PATH_MAX) {
                fprintf(stderr,"Contract ctl file path exceeds maximum path 
length\n");
                return -1;
        }
        if ((ctl_fd = open64(ctl_path, O_WRONLY)) < 0) {
                perror("Couldn't open control file for child contract");
                return -1;
        }

        /* call ctl_adopt so that the all the event pass to bundle file */
        if (ct_ctl_adopt(ctl_fd) != 0) {
                perror("Couldn't adopt contract");
        }else
                printf("The Contract is adopt successfully \n ");

        close(ctl_fd);

        return 0;

}


int main( )
{
        int             tmpl_fd,tmpl_fd1,tmpl_fd2,tmpl_fd3,tmpl_fd4;
        pid_t           pid,pid_1,pid_2;
        ctid_t          ctid,adopt_ctid;

        if ((tmpl_fd = activate_template(8)) < 0) { //setting contract with 
paramater value regent
                exit(1);
        }
        /*
         * Now that we've set the active template, fork a process to see
         * a new contract created.
         */
        if ((pid = fork()) < 0) {
                perror("Can't fork");
                                exit(1);
        }


        if(pid==0){
                if(ct_tmpl_clear(tmpl_fd)!=0){
                        perror("Can't Clear the template");
                        exit(1);
                }

                if((tmpl_fd1 = activate_template(1)) < 0) { //setting contract 
with paramater value inherit
                        exit(1);
                }
                                /* Creating the new child contract */
                if ((pid_1 = fork()) < 0) {
                        perror("Can't fork");
                        exit(1);
                }

                sleep(2);
                                /* Member process of parent contract abandon*/
        }else{
                sleep(52);
        }
        return 0;
}
 
 
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