minecraft-pi-reborn/launcher/src/mods.cpp

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#include <dirent.h>
#include <cerrno>
#include <sys/stat.h>
#include <unistd.h>
#include <libreborn/libreborn.h>
#include "bootstrap.h"
// Get All Mods In Folder
static void load(std::string &ld_preload, const std::string &folder) {
// Open Folder
DIR *dp = opendir(folder.c_str());
if (dp != nullptr) {
// Loop Through Folder
while (true) {
errno = 0;
dirent *entry = readdir(dp);
if (entry != nullptr) {
// Check If File Is Regular
if (entry->d_type == DT_REG) {
// Get Full Name
std::string name = folder + entry->d_name;
// Check If File Is Accessible
int result = access(name.c_str(), R_OK);
if (result == 0) {
// Add To LD_PRELOAD
ld_preload += name + ":";
} else if (result == -1 && errno != 0) {
// Fail
WARN("Unable To Access: %s: %s", name.c_str(), strerror(errno));
errno = 0;
}
}
} else if (errno != 0) {
// Error Reading Contents Of Folder
ERR("Error Reading Directory: %s: %s", folder.c_str(), strerror(errno));
} else {
// Done!
break;
}
}
// Close Folder
closedir(dp);
} else if (errno == ENOENT) {
// Folder Doesn't Exist
} else {
// Unable To Open Folder
ERR("Error Opening Directory: %s: %s", folder.c_str(), strerror(errno));
}
}
// Bootstrap Mods
#define SUBDIRECTORY_FOR_MODS "/mods/"
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std::string bootstrap_mods(const std::string &binary_directory) {
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// Prepare
std::string preload = "";
// ~/.minecraft-pi/mods
{
// Get Mods Folder
std::string mods_folder = std::string(getenv("HOME")) + HOME_SUBDIRECTORY_FOR_GAME_DATA SUBDIRECTORY_FOR_MODS;
// Load Mods From ./mods
load(preload, mods_folder);
}
// Built-In Mods
{
// Get Mods Folder
std::string mods_folder = binary_directory + SUBDIRECTORY_FOR_MODS;
// Load Mods From ./mods
load(preload, mods_folder);
}
// Add LD_PRELOAD
{
const char *value = getenv("LD_PRELOAD");
if (value != nullptr && strlen(value) > 0) {
preload += value;
}
}
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// Return
return preload;
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}