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handle_plugin_linux.c Go to the documentation of this file. /*---------------------------------------------------------------------------- * * Copyright (C) 2002-2004, Raphael Schneider * See the file COPYING for information on usage and redistribution. * * $Header: /home/cvs_repos.bak/librasch/src/handle_plugin_linux.c,v 1.10 2004/08/03 13:59:32 rasch Exp $ *--------------------------------------------------------------------------*/ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <errno.h> #include <dlfcn.h> #include <dirent.h> #include <sys/stat.h> #define _LIBRASCH_BUILD #include <ra_priv.h> #include <handle_plugin.h> #include <pl_general.h> int read_plugins(struct librasch *ra) { DIR *dir; struct dirent *dir_info; struct plugin_struct *phead = NULL; struct plugin_struct *pcurr = phead; char dir_locale[MAX_PATH_RA]; utf8_to_local(ra->config.plugin_dir, dir_locale, MAX_PATH_RA); if ((dir = opendir(dir_locale)) == NULL) return -1; while ((dir_info = readdir(dir)) != NULL) { char path[MAX_PATH_RA]; struct stat s; struct plugin_struct *pnew; sprintf(path, "%s%c%s", dir_locale, SEPERATOR, dir_info->d_name); if (stat(path, &s) == -1) continue; /* TODO: error handling */ /* check if d_name is not a dir */ if (S_ISDIR(s.st_mode)) continue; /* no -> try to load the plugin */ pnew = dload_plugin(path); if (!pnew) { if (ra_print_debug_infos) fprintf(stderr, gettext("can't load %s: %s\n"), path, dlerror()); continue; } pnew->ra = ra; if (pcurr) { pcurr->next = pnew; pnew->prev = pcurr; pcurr = pcurr->next; } else phead = pcurr = pnew; } closedir(dir); ra->pl_head = phead; /* now run init-functions for every plugin */ pcurr = phead; while (pcurr) { struct plugin_struct *p; int (*init)(struct librasch *, struct plugin_struct *); init = (int(*)(struct librasch *, struct plugin_struct *))dlsym(pcurr->dl, INIT_PLUGIN_FUNC); if (!init) { if (ra_print_debug_infos) fprintf(stderr, gettext("error load plugin %s: %s\n"), pcurr->info.name, dlerror()); dlclose(pcurr->dl); if (pcurr->prev) pcurr->prev->next = pcurr->next; p = pcurr; free(p); pcurr = pcurr->next; continue; } if ((*init)(ra, pcurr) != 0) { if (ra_print_debug_infos) fprintf(stderr, gettext("error init plugin %s: %s\n"), pcurr->info.name, dlerror()); dlclose(pcurr->dl); if (pcurr->prev) pcurr->prev->next = pcurr->next; p = pcurr; free(p); pcurr = pcurr->next; continue; } pcurr = pcurr->next; } return 0; } /* read_plugins() */ struct plugin_struct * dload_plugin(char *file) { int ret = 0; struct plugin_struct *p; int (*load) (struct plugin_struct *); p = malloc(sizeof(*p)); if (!p) return NULL; memset(p, 0, sizeof(*p)); p->handle_id = RA_HANDLE_PLUGIN; p->dl = dlopen(file, RTLD_NOW); if (!p->dl) { if (ra_print_debug_infos) fprintf(stderr, gettext("dlopen() failed\n")); free(p); return NULL; } load = (int(*)(struct plugin_struct *))dlsym(p->dl, LOAD_PLUGIN_FUNC); if (!load) { if (ra_print_debug_infos) fprintf(stderr, gettext("dlsym() failed\n")); dlclose(p->dl); free(p); return NULL; } if ((ret = (*load) (p)) != 0) { dlclose(p->dl); free(p); return NULL; } if (!is_plugin_ok(p)) { dlclose(p->dl); free(p); return NULL; } strncpy(p->info.file, file, MAX_PATH_RA); local_to_utf8_inplace(p->info.file, MAX_PATH_RA); p->info.use_plugin = 1; return p; } /* dload_plugin() */ int is_plugin_ok(struct plugin_struct *p) { /* check if minimal settings are done */ return 1; } /* is_plugin_ok() */ void close_plugins(struct plugin_struct *p) { struct plugin_struct *next; void (*close_func) (); while (p) { if (p->info.res) ra_free_mem(p->info.res); if (p->info.opt) ra_free_mem(p->info.opt); close_func = (void(*)())dlsym(p->dl, FINI_PLUGIN_FUNC); if (close_func) (*close_func) (); dlclose(p->dl); next = p->next; free(p); p = next; } } /* close_plugins() */