101 lines
2.4 KiB
C
101 lines
2.4 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <libreborn/libreborn.h>
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#include "override.h"
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#include "../home/home.h"
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// Hook access
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HOOK(access, int, (const char *pathname, int mode)) {
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char *new_path = override_get_path(pathname);
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// Open File
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ensure_access();
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int ret = (*real_access)(new_path != NULL ? new_path : pathname, mode);
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// Free Data
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if (new_path != NULL) {
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free(new_path);
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}
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// Return
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return ret;
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}
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// Get Override Path For File (If It Exists)
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char *override_get_path(const char *filename) {
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// Get MCPI Home Path
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char *home_path = home_get();
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// Get Asset Override Path
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char *overrides = NULL;
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safe_asprintf(&overrides, "%s/overrides", home_path);
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// Data Prefiix
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char *data_prefix = "data/";
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int data_prefix_length = strlen(data_prefix);
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// Folders To Check
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char *asset_folders[] = {
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overrides,
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getenv("MCPI_REBORN_ASSETS_PATH"),
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getenv("MCPI_VANILLA_ASSETS_PATH"),
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NULL
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};
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// Check For Override
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char *new_path = NULL;
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if (starts_with(filename, data_prefix)) {
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// Test Asset Folders
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for (int i = 0; asset_folders[i] != NULL; i++) {
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safe_asprintf(&new_path, "%s/%s", asset_folders[i], &filename[data_prefix_length]);
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ensure_access();
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if ((*real_access)(new_path, F_OK) == -1) {
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// Not Found In Asset Folder
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free(new_path);
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new_path = NULL;
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continue;
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} else {
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// Found
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break;
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}
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}
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}
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// Free
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free(overrides);
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// Return
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return new_path;
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}
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// Hook fopen
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HOOK(fopen, FILE *, (const char *filename, const char *mode)) {
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char *new_path = override_get_path(filename);
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// Open File
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ensure_fopen();
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FILE *file = (*real_fopen)(new_path != NULL ? new_path : filename, mode);
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// Free Data
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if (new_path != NULL) {
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free(new_path);
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}
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// Return File
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return file;
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}
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// Hook fopen64
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HOOK(fopen64, FILE *, (const char *filename, const char *mode)) {
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char *new_path = override_get_path(filename);
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// Open File
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ensure_fopen64();
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FILE *file = (*real_fopen64)(new_path != NULL ? new_path : filename, mode);
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// Free Data
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if (new_path != NULL) {
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free(new_path);
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}
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// Return File
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return file;
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}
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