Anonymous

#include <signal.h>
#include "exec.h"
#include "config.h"
namespace myexec {
int execbase::setprog(const char *newprog){
        if(prog==NULL){prog=new char[MAXLINE];}
        strcpy(prog,newprog);
        return strlen(prog);
}
        int execbase::exec(){
                int stdinfd[2],stdoutfd[2];
                const char *shell_args[4] = { "/bin/bash", "-c", NULL, NULL };
                if (pipe(stdinfd)==-1){return -1;}
                if (pipe(stdoutfd)==-1){return -2;}
                shell_args[2]=prog;
                this->pid=fork();
                if(this->pid==-1){
                        close(stdinfd[0]);close(stdinfd[1]);
                        close(stdoutfd[0]);close(stdoutfd[1]);
                        return -3;
                }
                if(pid!=0){
                        //printf("i'm a father:O\n");
                        this->infd=stdinfd[1];
                        close(stdinfd[0]);
                        this->outfd=stdoutfd[0];
                        close(stdoutfd[1]);
                        printf("starting handle\n");
                        return this->handle();
                }
                //printf("i'm the child\n");
                setsid();
                setuid(getuid());
                setgid(getgid());
                signal(SIGINT,SIG_IGN);
                signal(SIGQUIT,SIG_DFL);
                putenv("TERM=tty");
                dup2(stdinfd[0],STDIN_FILENO);
                dup2(stdoutfd[1],STDOUT_FILENO);
                dup2(stdoutfd[1],STDERR_FILENO);
                for(int n=3;n<256;n++)close(n);
                execvp(shell_args[0],(char**)shell_args);
                fprintf(stderr,"error exec'ing\n");
                _exit(-1);
        }
        int execbase::handle(){
                printf("old handle started\n");
                char *buffer=new char[MAXLINE];
                int ret;
                while((ret=read(this->outfd,buffer,511))){
                        printf("got a chunk");
                        write(STDOUT_FILENO,buffer,ret);
                }
                return 0;
        }
}