/* * Look for a possible callback for a newly added variable * This is called specifically when the variable did not exist in the hash * previously, so the blanket update did not find this variable. */ void env_callback_init(ENTRY *var_entry) { const char *var_name = var_entry->key; char callback_name[256] = ""; struct env_clbk_tbl *clbkp; int ret = 1; if (first_call) { callback_list = getenv(ENV_CALLBACK_VAR); first_call = 0; } /* look in the ".callbacks" var for a reference to this variable */ if (callback_list != NULL) ret = env_attr_lookup(callback_list, var_name, callback_name); /* only if not found there, look in the static list */ if (ret) ret = env_attr_lookup(ENV_CALLBACK_LIST_STATIC, var_name, callback_name); /* if an association was found, set the callback pointer */ if (!ret && strlen(callback_name)) { clbkp = find_env_callback(callback_name); if (clbkp != NULL) #if defined(CONFIG_NEEDS_MANUAL_RELOC) var_entry->callback = clbkp->callback + gd->reloc_off; #else var_entry->callback = clbkp->callback; #endif } }
/* * Call for each element in the list that associates variables to callbacks */ static int set_callback(const char *name, const char *value, void *priv) { ENTRY e, *ep; struct env_clbk_tbl *clbkp; e.key = name; e.data = NULL; e.callback = NULL; hsearch_r(e, FIND, &ep, &env_htab, 0); /* does the env variable actually exist? */ if (ep != NULL) { /* the assocaition delares no callback, so remove the pointer */ if (value == NULL || strlen(value) == 0) ep->callback = NULL; else { /* assign the requested callback */ clbkp = find_env_callback(value); if (clbkp != NULL) #if defined(CONFIG_NEEDS_MANUAL_RELOC) ep->callback = clbkp->callback + gd->reloc_off; #else ep->callback = clbkp->callback; #endif } } return 0; }
/* * Look for a possible callback for a newly added variable * This is called specifically when the variable did not exist in the hash * previously, so the blanket update did not find this variable. */ void env_callback_init(ENTRY *var_entry) { const char *var_name = var_entry->key; const char *callback_list = getenv(ENV_CALLBACK_VAR); char callback_name[256] = ""; struct env_clbk_tbl *clbkp; int ret = 1; /* look in the ".callbacks" var for a reference to this variable */ if (callback_list != NULL) ret = env_attr_lookup(callback_list, var_name, callback_name); /* only if not found there, look in the static list */ if (ret) ret = env_attr_lookup(ENV_CALLBACK_LIST_STATIC, var_name, callback_name); /* if an association was found, set the callback pointer */ if (!ret && strlen(callback_name)) { clbkp = find_env_callback(callback_name); if (clbkp != NULL) var_entry->callback = clbkp->callback; } }