83 lines
2.0 KiB
C
83 lines
2.0 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 "../home/home.h"
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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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// Get Data Path
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char *data = NULL;
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char *binary_directory = get_mcpi_directory();
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safe_asprintf(&data, "%s/data", binary_directory);
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int data_length = strlen(data);
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// Get Full Path
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char *full_path;
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if (strlen(filename) > 0 && filename[0] == '/') {
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// Absolute Path
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full_path = strdup(filename);
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} else {
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// Relative Path
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full_path = realpath(filename, 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 (full_path != NULL) {
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if (starts_with(full_path, data)) {
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safe_asprintf(&new_path, "%s%s", overrides, &full_path[data_length]);
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if (access(new_path, F_OK) == -1) {
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free(new_path);
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new_path = NULL;
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}
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}
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free(full_path);
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}
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// Free Variables
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free(overrides);
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free(data);
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// Return
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return new_path;
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}
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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, 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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