88 lines
1.7 KiB
C
88 lines
1.7 KiB
C
#include <stdio.h>
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#include <dlfcn.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <dirent.h>
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#include <string.h>
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struct plugin_list
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{
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char *name;
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void *handle;
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struct plugin_list *next;
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};
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struct plugin_list *plugins = NULL;
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struct plugin_list **next = &plugins;
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static void *load_plugin(const char *name)
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{
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for (struct plugin_list *ptr = plugins; ptr != NULL; ptr = ptr->next) {
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if (strcmp(ptr->name, name) == 0)
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return ptr->handle;
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}
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size_t len = strlen(name);
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char dependency_file_name[1 + 1 + 7 + 1 + len + 1 + 12 + 1 + 3 + 1];
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sprintf(dependency_file_name, "./plugins/%s/dependencies.txt", name);
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FILE *dependency_file = fopen(dependency_file_name, "r");
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if (dependency_file) {
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char dependency[BUFSIZ];
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while (fscanf(dependency_file, "%s", dependency) != EOF)
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load_plugin(dependency);
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fclose(dependency_file);
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}
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char library_name[1 + 1 + 7 + 1 + len + 1 + len + 1 + 2 + 1];
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sprintf(library_name, "./plugins/%s/%s.so", name, name);
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void *handle = dlopen(library_name, RTLD_NOW | RTLD_GLOBAL);
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if (! handle) {
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printf("%s\n", dlerror());
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exit(EXIT_FAILURE);
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}
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char *namebuf = malloc(len + 1);
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strcpy(namebuf, name);
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*next = malloc(sizeof(struct plugin_list));
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**next = (struct plugin_list) {
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.name = namebuf,
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.handle = handle,
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.next = NULL,
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};
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next = &(*next)->next;
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printf("Loaded %s\n", name);
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return handle;
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}
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int main()
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{
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void *main_plugin = load_plugin("game");
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DIR *dir = opendir("plugins");
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assert(dir);
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struct dirent *dp;
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while (dp = readdir(dir))
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if (dp->d_name[0] != '.')
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load_plugin(dp->d_name);
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closedir(dir);
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void (*game_func)() = dlsym(main_plugin, "game");
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assert(game_func);
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game_func();
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}
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