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121 lines
2.7 KiB
C
121 lines
2.7 KiB
C
/* Test of dlopen() for a plugin based services architecture for finit
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*
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* Copyright (c) 2012 Joachim Nilsson <troglobit@gmail.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <errno.h>
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#include <dlfcn.h> /* dlopen() et al */
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#include <dirent.h> /* readdir() et al */
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#include <stdio.h>
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#include <string.h>
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#include <sys/queue.h> /* BSD sys/queue.h API */
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#include "plugin.h"
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static LIST_HEAD(, plugin) plugins = LIST_HEAD_INITIALIZER();
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int plugin_register(plugin_t *plugin)
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{
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if (!plugin) {
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errno = EINVAL;
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return 1;
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}
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if (!plugin->name) {
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Dl_info info;
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if (!dladdr(plugin, &info) || !info.dli_fname)
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plugin->name = "unknown";
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else
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plugin->name = info.dli_fname;
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}
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LIST_INSERT_HEAD(&plugins, plugin, link);
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return 0;
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}
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int plugin_unregister(plugin_t *plugin)
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{
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LIST_REMOVE(plugin, link);
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return 0;
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}
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void run_hooks(hook_point_t no)
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{
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plugin_t *p;
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PLUGIN_ITERATOR(p) {
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if (p->hook[no].cb) {
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printf("Calling %s hook n:o %d from runloop...\n", p->name, no);
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p->hook[no].cb(p->hook[no].arg);
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}
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}
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}
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void run_services(void)
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{
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plugin_t *p;
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PLUGIN_ITERATOR(p) {
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if (p->svc.cb) {
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printf("Calling svc %s from runloop...\n", p->name);
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p->svc.cb(p->svc.arg);
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}
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}
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}
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int load_plugins(void)
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{
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DIR *dp = opendir(PLUGIN_PATH);
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struct dirent *entry;
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if (!dp) {
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fprintf(stderr, "Failed, cannot open plugin directory %s: %s\n",
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PLUGIN_PATH, strerror(errno));
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return 1;
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}
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while ((entry = readdir(dp))) {
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char *ext = entry->d_name + strlen(entry->d_name) - 3;
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if (!strcmp(ext, ".so")) {
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void *handle;
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char filename[1024];
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snprintf(filename, sizeof(filename), "%s/%s", PLUGIN_PATH, entry->d_name);
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printf("Loading plugin %s ...\n", filename);
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handle = dlopen(filename, RTLD_LAZY);
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if (!handle) {
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fprintf(stderr,
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"Failed loading plugin %s: %s\n", filename, dlerror());
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return 1;
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}
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}
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}
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closedir(dp);
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return 0;
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}
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/**
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* Local Variables:
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* version-control: t
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* indent-tabs-mode: t
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* c-file-style: "linux"
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* End:
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*/
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