Need to know which language to learn for a specific project

[oasmar]

Hello, i have used Ubuntu for a month now and i want to make a simple (i think) program for a game. I want it to kinda be like this:

LOOK HERE (http://img232.imageshack.us/my.php?image=loaderprogramdh9.png)

Basically has two text inputs and an "ok" button.
I want it to compile the following script using the information the user has input and run it:

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ptrace.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <asm/ptrace.h>
#include <errno.h>


#define AD_START 0x851f000 //0x855d000
#define AD_HOST_FIRST 0x15d8c0 //0x15d540
#define NUM_HOST 5
#define HOST_SEP 0x70
#define HOST_TO_PORT_SEP 0x64
#define HOST_MAX_SIZE 0x40

#define AD_RSAKEY 0x45efe0 //0x4638c0

const char rsakey[]=
"10912013296739942927886096050899"
"55415282375029027981291234687579"
"37266291492576446330739696001110"
"60390723088861007265581882535850"
"34290575928276294364131085660290"
"93628212635953836686562675849720"
"62078627943109021801768106152175"
"50567108238764764442605581471797"
"07119674283982419152118103759076"
"030616683978566631413";


//#define _DUMP

int main(int argc, char *argv[]) {

char host[HOST_MAX_SIZE]="PUT IP HERE";
long port=PORT;
char path[256]="./Tibia";

#ifdef _DUMP
unsigned long d_start = AD_START;
long d_size = 4;
if(argc > 2) d_size = atol(argv[2]);
if(argc > 1) d_start = strtoul(argv[1], NULL, 0);
#else
if(argc > 3) strcpy(path, argv[3]);
if(argc > 2) port = atol(argv[2]);
if(argc > 1) strcpy(host, argv[1]);
#endif

int fdin, fdout;
fdin = open(path, O_RDONLY);
if(-1 == fdin) {
fprintf(stderr, "Failed to open %s.\n", path);
return 1;
}
strcat(path, ".ot");
fdout = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0700);
if(-1 == fdout) {
fprintf(stderr, "Failed to open or create %s.\n", path);
close(fdin);
return 1;
}

char buf[8192];
int n;
while(n = read(fdin, buf, 8192)) {
if(-1 == n) {
fprintf(stderr, "Error in read.\n", path);
close(fdin);
close(fdout);
return 1;
}
if(-1 == write(fdout, buf, n)) {
fprintf(stderr, "Error in write.\n", path);
close(fdin);
close(fdout);
return 1;
}
}

if(-1 == lseek(fdout, AD_RSAKEY, SEEK_SET)) {
fprintf(stderr, "Error in lseek.\n", path);
close(fdin);
close(fdout);
return 1;
}
if(-1 == write(fdout, rsakey, sizeof(rsakey))) {
fprintf(stderr, "Error in write(2).\n", path);
close(fdin);
close(fdout);
return 1;
}

close(fdin);
close(fdout);


int pid;
int wait_val;
switch (pid = fork()) {
case -1:
perror("fork");
break;
case 0:
if(-1 == ptrace(PTRACE_TRACEME, 0, NULL, NULL) && errno) {
perror("ptrace(1)");
return 1;
}
if(-1 == execl(path, path, NULL)) {
perror("execl");
return 1;
}
break;
default:
if(-1 == wait(&wait_val)) {
perror("wait(1)");
return 1;
}

int i,j;
long pos;
long *plong;
int counter=0;
while (!WIFEXITED(wait_val)) {
counter++;
if(counter == 2) {

#ifdef _DUMP
printf("Dumping from 0x%x to 0x%x (%lu KB).\n", d_start, d_start + (d_size*1024), d_size);
FILE *fp;
long data;
fp = fopen("dump.txt", "w+b");
if(!fp) {
fprintf(stderr, "Failed to open or create dump.txt.\n");
return 1;
}
for(i=0; i<(d_size*1024); i+=4) {
data = ptrace(PTRACE_PEEKDATA, pid, d_start + i, NULL);
if(-1 == data && errno) {
perror("ptrace(2)");
fclose(fp);
return 1;
}
if(!fwrite(&data, sizeof(long), 1, fp)) {
fprintf(stderr, "fwrite failed.\n");
fclose(fp);
return 1;
}
}
fclose(fp);
#else
pos = AD_START + AD_HOST_FIRST;

for(j=0; j<NUM_HOST; j++) {
plong = (long *) host;
for(i=0; i<HOST_MAX_SIZE; i+=4) {
if(-1 == ptrace(PTRACE_POKEDATA, pid, pos+i+(j*HOST_SEP), *(plong+i/4)) && errno) {
perror("ptrace(3)");
return 1;
}
}
if(-1 == ptrace(PTRACE_POKEDATA, pid, pos+HOST_TO_PORT_SEP+(j*HOST_SEP), port) && errno) {
perror("ptrace(4)");
return 1;
}
}
#endif
if(-1 == kill(pid, SIGALRM)) {
perror("kill SIGALRM");
return 1;
}
if(-1 == ptrace(PTRACE_DETACH, pid, NULL, NULL) && errno) {
perror("ptrace(5)");
return 1;
}
return 0;
}

if(-1 == ptrace(PTRACE_CONT, pid, NULL, NULL) && errno) {
perror("ptrace(6)");
return 1;
}
if(-1 == wait(&wait_val)) {
perror("wait(2)");
return 1;
}
}
}
return 0;
}


Any help/guidance would be great!

[pmasiar]

web-based game? GUI on desktop? Linux only?

[oasmar]

Ive got the script done i just need to make the prgram which compiles the file with the users IP and PORT then runs. The script works fine because u can compile it with the terminal g++ command and put it in the game directory then run it, but i want to make a program which does that for you.

[Engnome]

You should try and get those parameters from the command line instead. So that when a user starts he uses ./filename -ip -portnumber. (port number should be standard unless specified.)

Compiling the script every time is not a good idea.

[oasmar]

Thanks, Im Very new to prgramming, Ive only just learnt PHP (barely :P) so ill need help like which language to use, programs to use, ways of implementing my idea. I would like guides, help and ure own opinions on how to make my program.

[slavik]

look up 'command line options in C' in google, that should give you some insight, also if you can, get the C Programming Language book by Kerninghan and Ritchie (reffered to as the K&R book): http://www.amazon.com/C-Programming-Language-2nd/dp/0131103628/sr=8-1/qid=1168013893/ref=pd_bbs_1/102-5119516-8340140?ie=UTF8&s=books

[pmasiar]

Thanks, Im Very new to prgramming, Ive only just learnt PHP (barely :P) so ill need help like which language to use.

Which language is good for a beginner? Gets asked 3 times a week. Last time it was today :-) see this thread (http://ubuntuforums.org/showthread.php?t=331108) Good luck!

BTW answer is: python :-)

[oasmar]

I wasnt asking which language for beginers i was asking which would be best for that project :P

[gummibaerchen]

I wasnt asking which language for beginers i was asking which would be best for that project :P

And what does your program do?

[tomchuk]

That code will already happily take command line args for host, port and path.

Just change:


char host[HOST_MAX_SIZE]="PUT IP HERE";
long port=PORT;
char path[256]="./Tibia";

to

char host[HOST_MAX_SIZE];
long port;
char path[256];


and run it with host, port and path as the command line args in that order.