88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
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#define _FILE_OFFSET_BITS 64
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#define _GNU_SOURCE
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <dirent.h>
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#include <errno.h>
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static int starts_with(const char *s, const char *t) {
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return strncmp(s, t, strlen(t)) == 0;
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}
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static int ends_with(const char *s, const char *t) {
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size_t slen = strlen(s);
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size_t tlen = strlen(t);
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if (tlen > slen) return 1;
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return strcmp(s + slen - tlen, t) == 0;
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}
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#define MODS_FOLDER "./mods/"
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static void set_and_print_env(char *name, char *value) {
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fprintf(stderr, "Set %s = %s\n", name, value);
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setenv(name, value, 1);
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}
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static char *get_env_safe(const char *name) {
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char *ret = getenv(name);
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return ret != NULL ? ret : "";
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}
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int main(__attribute__((unused)) int argc, char *argv[]) {
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fprintf(stderr, "Configuring Game...\n");
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char *ld_path = NULL;
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char *cwd = getcwd(NULL, 0);
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asprintf(&ld_path, "%s:/usr/arm-linux-gnueabihf/lib:%s", cwd, get_env_safe("LD_LIBRARY_PATH"));
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free(cwd);
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set_and_print_env("LD_LIBRARY_PATH", ld_path);
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free(ld_path);
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char *ld_preload = NULL;
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asprintf(&ld_preload, "%s", get_env_safe("LD_PRELOAD"));
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int folder_name_length = strlen(MODS_FOLDER);
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DIR *dp = opendir(MODS_FOLDER);
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if (dp != NULL) {
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struct dirent *entry = NULL;
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errno = 0;
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while (1) {
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entry = readdir(dp);
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if (entry != NULL) {
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if (starts_with(entry->d_name, "lib") && ends_with(entry->d_name, ".so")) {
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int name_length = strlen(entry->d_name);
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int total_length = folder_name_length + name_length;
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char name[total_length + 1];
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for (int i = 0; i < folder_name_length; i++) {
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name[i] = MODS_FOLDER[i];
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}
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for (int i = 0; i < name_length; i++) {
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name[folder_name_length + i] = entry->d_name[i];
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}
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name[total_length] = '\0';
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asprintf(&ld_preload, "%s:%s", name, ld_preload);
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}
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} else if (errno != 0) {
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fprintf(stderr, "Error Reading Directory: %s\n", strerror(errno));
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exit(1);
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} else {
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break;
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}
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}
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} else {
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fprintf(stderr, "Error Opening Directory: %s\n", strerror(errno));
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exit(1);
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}
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closedir(dp);
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set_and_print_env("LD_PRELOAD", ld_preload);
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free(ld_preload);
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fprintf(stderr, "Starting Game...\n");
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return execve("./minecraft-pi", argv, environ);
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}
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