/*
 * Half-Life Linux dedicated server liblist.gam redirector
 * Part of dedtools
 * Code by Tomas Janousek <tomi@nomi.cz>
 * This is GPL code.
 */
#include <stdlib.h>
#include <dlfcn.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>

static FILE *(*old_f)(const char *path, const char *mode) = 0;
static int (*old_stat)(int ver, const char *file_name, struct stat *buf) = 0;

static const char str1[] = "liblist.gam";
static int str1sz = sizeof(str1)/sizeof(*str1) - 1;

static const char *getpath(const char *path)
{
    const char *newpath = 0;

    if (path && strlen(path) >= str1sz && !strcmp(path + strlen(path) - str1sz, str1)) {
	newpath = getenv("HLDS_LIBLIST_GAM");
	if (newpath)
	    path = newpath;
    }

    return path;
}

int __xstat(int ver, const char *file_name, struct stat *buf)
{
    if (!old_stat) {
	old_stat = dlsym(RTLD_NEXT,"__xstat");
	if (!old_stat)
	    exit(-1);
    }

    return old_stat(ver, getpath(file_name), buf);
}

FILE *fopen(const char *path, const char *mode)
{
    if (!old_f) {
	old_f = dlsym(RTLD_NEXT,"fopen");
	if (!old_f)
	    exit(-1);
    }

    return old_f(getpath(path), mode);
}