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/**
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* NEURON IIoT System for Industry 4.0
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* Copyright (C) 2020-2022 EMQ Technologies Co., Ltd All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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**/
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#include <errno.h>
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#include <stdlib.h>
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#include <neuron.h>
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#include "errcodes.h"
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struct neu_plugin {
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neu_plugin_common_t common;
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// neu_events_t *events;
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// int file_length;
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};
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static neu_plugin_t *driver_open(void);
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static int driver_close(neu_plugin_t *plugin);
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static int driver_init(neu_plugin_t *plugin, bool load);
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static int driver_uninit(neu_plugin_t *plugin);
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static int driver_start(neu_plugin_t *plugin);
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static int driver_stop(neu_plugin_t *plugin);
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static int driver_config(neu_plugin_t *plugin, const char *config);
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static int driver_request(neu_plugin_t *plugin, neu_reqresp_head_t *head,
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void *data);
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static int driver_tag_validator(const neu_datatag_t *tag);
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static int driver_validate_tag(neu_plugin_t *plugin, neu_datatag_t *tag);
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static int driver_group_timer(neu_plugin_t *plugin, neu_plugin_group_t *group);
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static int driver_write(neu_plugin_t *plugin, void *req, neu_datatag_t *tag,
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neu_value_u value);
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static const neu_plugin_intf_funs_t plugin_intf_funs = {
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.open = driver_open,
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.close = driver_close,
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.init = driver_init,
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.uninit = driver_uninit,
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.start = driver_start,
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.stop = driver_stop,
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.setting = driver_config,
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.request = driver_request,
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.driver.validate_tag = driver_validate_tag,
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.driver.group_timer = driver_group_timer,
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.driver.group_sync = NULL,
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.driver.write_tag = driver_write,
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.driver.tag_validator = driver_tag_validator,
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.driver.write_tags = NULL,
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.driver.test_read_tag = NULL,
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.driver.add_tags = NULL,
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.driver.load_tags = NULL,
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.driver.del_tags = NULL,
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};
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const neu_plugin_module_t neu_plugin_module = {
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.version = NEURON_PLUGIN_VER_1_0,
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.schema = "file",
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.module_name = "File",
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.module_descr = "The plugin is used to read and write files.",
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.module_descr_zh = "该插件用于读写文件。",
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.intf_funs = &plugin_intf_funs,
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.kind = NEU_PLUGIN_KIND_SYSTEM,
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.type = NEU_NA_TYPE_DRIVER,
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.display = true,
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.single = false,
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};
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static neu_plugin_t *driver_open(void)
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{
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neu_plugin_t *plugin = calloc(1, sizeof(neu_plugin_t));
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neu_plugin_common_init(&plugin->common);
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return plugin;
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}
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static int driver_close(neu_plugin_t *plugin)
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{
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free(plugin);
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return 0;
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}
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static int driver_init(neu_plugin_t *plugin, bool load)
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{
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(void) load;
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plog_notice(plugin, "%s init success", plugin->common.name);
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return 0;
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}
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static int driver_uninit(neu_plugin_t *plugin)
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{
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plog_notice(plugin, "%s uninit success", plugin->common.name);
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return 0;
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}
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static int driver_start(neu_plugin_t *plugin)
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{
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neu_adapter_update_metric_cb_t update_metric =
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plugin->common.adapter_callbacks->update_metric;
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update_metric(plugin->common.adapter, NEU_METRIC_LAST_RTT_MS, 1, NULL);
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plugin->common.link_state = NEU_NODE_LINK_STATE_CONNECTED;
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plog_notice(plugin, "start `%s` plugin success", plugin->common.name);
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return 0;
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}
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static int driver_stop(neu_plugin_t *plugin)
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{
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neu_adapter_update_metric_cb_t update_metric =
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plugin->common.adapter_callbacks->update_metric;
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update_metric(plugin->common.adapter, NEU_METRIC_LAST_RTT_MS, 9999, NULL);
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plugin->common.link_state = NEU_NODE_LINK_STATE_DISCONNECTED;
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plog_notice(plugin, "stop `%s` plugin success", plugin->common.name);
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return 0;
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}
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static int driver_config(neu_plugin_t *plugin, const char *config)
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{
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(void) plugin;
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(void) config;
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return 0;
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}
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static int driver_request(neu_plugin_t *plugin, neu_reqresp_head_t *head,
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void *data)
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{
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(void) plugin;
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(void) head;
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(void) data;
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return 0;
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}
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static int driver_tag_validator(const neu_datatag_t *tag)
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{
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(void) tag;
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return 0;
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}
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static int driver_validate_tag(neu_plugin_t *plugin, neu_datatag_t *tag)
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{
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if (tag->type != NEU_TYPE_STRING) {
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return NEU_ERR_TAG_TYPE_NOT_SUPPORT;
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}
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plog_notice(plugin, "validate tag success, name:%s, address:%s, type:%d ",
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tag->name, tag->address, tag->type);
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return 0;
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}
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static int driver_group_timer(neu_plugin_t *plugin, neu_plugin_group_t *group)
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{
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neu_adapter_update_metric_cb_t update_metric =
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plugin->common.adapter_callbacks->update_metric;
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utarray_foreach(group->tags, neu_datatag_t *, tag)
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{
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neu_dvalue_t dvalue = { 0 };
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FILE *fp = fopen(tag->address, "r");
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if (fp == NULL) {
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dvalue.type = NEU_TYPE_ERROR;
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if (errno == ENOENT) {
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dvalue.value.i32 = NEU_ERR_FILE_NOT_EXIST;
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} else {
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dvalue.value.i32 = NEU_ERR_FILE_OPEN_FAILURE;
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}
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} else {
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char *buf = calloc(1, 1024);
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int ret = fread(buf, 1, 1024, fp);
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if (ret < 0) {
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dvalue.type = NEU_TYPE_ERROR;
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dvalue.value.i32 = NEU_ERR_FILE_READ_FAILURE;
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} else {
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dvalue.type = NEU_TYPE_STRING;
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strncpy(dvalue.value.str, buf, NEU_VALUE_SIZE - 1);
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}
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fclose(fp);
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free(buf);
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}
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plugin->common.adapter_callbacks->driver.update(
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plugin->common.adapter, group->group_name, tag->name, dvalue);
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}
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update_metric(plugin->common.adapter, NEU_METRIC_SEND_BYTES, 0, NULL);
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update_metric(plugin->common.adapter, NEU_METRIC_RECV_BYTES, 0, NULL);
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update_metric(plugin->common.adapter, NEU_METRIC_LAST_RTT_MS, 1, NULL);
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update_metric(plugin->common.adapter, NEU_METRIC_GROUP_LAST_SEND_MSGS, 1,
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group->group_name);
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return 0;
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}
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static int driver_write(neu_plugin_t *plugin, void *req, neu_datatag_t *tag,
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neu_value_u value)
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{
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FILE *fp = fopen(tag->address, "w");
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if (fp == NULL) {
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if (errno == ENOENT) {
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plugin->common.adapter_callbacks->driver.write_response(
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plugin->common.adapter, req, NEU_ERR_FILE_NOT_EXIST);
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} else {
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plugin->common.adapter_callbacks->driver.write_response(
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plugin->common.adapter, req, NEU_ERR_FILE_OPEN_FAILURE);
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}
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} else {
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if (tag->type == NEU_TYPE_STRING) {
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size_t ret = fwrite(value.str, 1, strlen(value.str), fp);
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if (ret != strlen(value.str)) {
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plugin->common.adapter_callbacks->driver.write_response(
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plugin->common.adapter, req, NEU_ERR_FILE_WRITE_FAILURE);
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}
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} else {
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plugin->common.adapter_callbacks->driver.write_response(
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plugin->common.adapter, req, NEU_ERR_PLUGIN_TAG_TYPE_MISMATCH);
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}
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fclose(fp);
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plugin->common.adapter_callbacks->driver.write_response(
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plugin->common.adapter, req, 0);
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}
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return 0;
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}
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