diff options
Diffstat (limited to 'src/console/logstorage/dlt-logstorage-list.c')
| -rw-r--r-- | src/console/logstorage/dlt-logstorage-list.c | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/src/console/logstorage/dlt-logstorage-list.c b/src/console/logstorage/dlt-logstorage-list.c new file mode 100644 index 0000000..0b7a8c0 --- /dev/null +++ b/src/console/logstorage/dlt-logstorage-list.c @@ -0,0 +1,236 @@ +/** + * @licence app begin@ + * Copyright (C) 2013 - 2015 Advanced Driver Information Technology. + * This code is developed by Advanced Driver Information Technology. + * Copyright of Advanced Driver Information Technology, Bosch and DENSO. + * + * This file is part of GENIVI Project Dlt - Diagnostic Log and Trace console apps. + * + * + * \copyright + * This Source Code Form is subject to the terms of the + * Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with + * this file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * + * \author Anitha.BA <anithaammaji.baggam@in.bosch.com> ADIT 2015 + * \author Christoph Lipka <clipka@jp.adit-jv.com> ADIT 2015 + * \author Frederic Berat <fberat@de.adit-jv.com> ADIT 2015 + * + * \file dlt-logstorage-list.c + * For further information see http://www.genivi.org/. + * @licence end@ + */ + +/******************************************************************************* +** ** +** SRC-MODULE: dlt-logstorage-list.c ** +** ** +** TARGET : linux ** +** ** +** PROJECT : DLT ** +** ** +** AUTHOR : Christoph Lipka clipka@jp.adit-jv.com ** +** Anitha.B.A anithaammaji.baggam@in.bosch.com ** +** Frederic Berat fberat@de.adit-jv.com ** +** ** +** PURPOSE : linked list implementation for storing the device info ** +** ** +** REMARKS : ** +** ** +** PLATFORM DEPENDANT [yes/no]: yes ** +** ** +** TO BE CHANGED BY USER [yes/no]: no ** +** ** +*******************************************************************************/ + +/******************************************************************************* +** Author Identity ** +******************************************************************************** +** ** +** Initials Name Company ** +** -------- ------------------------- ---------------------------------- ** +** BA Anitha ADIT ** +** cl Christoph Lipka ADIT ** +** fb Frederic Berat ADIT ** +*******************************************************************************/ +#define pr_fmt(fmt) "Log storage list: "fmt + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "dlt_common.h" +#include "dlt-control-common.h" +#include "dlt-logstorage-common.h" + +static struct LogstorageDeviceInfo +{ + char *dev_node; /**< The device node */ + char *mnt_point; /**< Mount point for this device */ + struct LogstorageDeviceInfo *prev; /**< Previous element of the list */ + struct LogstorageDeviceInfo *next; /**< Next element of the list */ +} *g_info; + +/** @brief Prints the device list in verbose mode + * + * This can be used to debug the behavior. + * Therefore, it's only available in verbose mode. + */ +void print_list() +{ + struct LogstorageDeviceInfo *ptr = g_info; + pr_verbose(" -------Device list-------\n"); + + while (ptr != NULL) + { + pr_verbose("%p:\t[%s][%s] \n", ptr, ptr->dev_node, ptr->mnt_point); + ptr = ptr->next; + } + + pr_verbose(" -------Device list end-------\n\n"); + + return; +} + +/** @brief Find element in the list based on device node + * + * Allows to check whether a device is already in the list or + * to find out the one to be removed. + * + * @param node The device node to look for + * + * @return The element of the list found, NULL either. + */ +static struct LogstorageDeviceInfo *logstorage_find_dev_info(const char *node) +{ + struct LogstorageDeviceInfo *ptr = g_info; + + if (!node) + { + return NULL; + } + + pr_verbose("Looking for %s.\n", node); + + while (ptr != NULL) + { + if (strncmp(ptr->dev_node, node, DLT_MOUNT_PATH_MAX) == 0) + { + pr_verbose("%s found in %p.\n", node, ptr); + break; + } + else + { + ptr = ptr->next; + } + } + + return ptr; +} + +/** @brief Add new device in the list + * + * The device is only added if a configuration file has been found and + * if it's not already in the list. + * + * @param node The device node to add + * @param path The corresponding mount point path + * + * @return 0 on success, -1 in case of error. + */ +int logstorage_store_dev_info(const char *node, const char *path) +{ + struct LogstorageDeviceInfo *ptr = NULL; + + if ((node == NULL) || (path == NULL)) + { + pr_error("Invalid input\n"); + return -1; + } + + if (logstorage_find_dev_info(node)) + { + pr_verbose("%s already in list.\n", node); + print_list(); + return 0; + } + + ptr = calloc(1, sizeof(struct LogstorageDeviceInfo)); + + if (ptr == NULL) + { + pr_error("Node creation failed\n"); + return -1; + } + + ptr->dev_node = strdup(node); + ptr->mnt_point = strndup(path, DLT_MOUNT_PATH_MAX); + + /* Put it on head */ + ptr->next = g_info; + + if (g_info) + { + g_info->prev = ptr; + } + + g_info = ptr; + + pr_verbose("%s added to list.\n", node); + print_list(); + + return 0; +} + +/** @brief Remove a device from the list + * + * If the device is removed from the list, the mount point + * pointer is given back to the caller. That means that + * he has to free it. + * + * @param node The device node to be removed + * + * @return the mount point if the node is found, NULL either. + */ +char *logstorage_delete_dev_info(const char *node) +{ + struct LogstorageDeviceInfo *del = NULL; + char *ret = NULL; + + del = logstorage_find_dev_info(node); + + if (del == NULL) + { + pr_verbose("%s not found in list.\n", node); + print_list(); + return ret; + } + + /* Has to be freed by the caller */ + ret = del->mnt_point; + + if (del->prev) + { + del->prev->next = del->next; + } + + if (del->next) + { + del->next->prev = del->prev; + } + + if (del == g_info) + { + g_info = g_info->next; + } + + free(del->dev_node); + free(del); + + pr_verbose("%s removed from list.\n", node); + print_list(); + + return ret; +} |