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/*
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* Intel(R) Enclosure LED Utilities
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* Copyright (C) 2009-2019 Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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#ifndef _UTILS_H_INCLUDED_
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#define _UTILS_H_INCLUDED_
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#include <getopt.h>
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#include "config_file.h"
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#include "stdlib.h"
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#include "stdint.h"
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#include "list.h"
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#include "status.h"
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#include "syslog.h"
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#include "ibpi.h"
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/**
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* Value is intentionally unused.
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* Macro to prevent compiler from raising unused result warning.
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*/
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#define UNUSED(x) do { if (x); } while (0)
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/**
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* Maximum number of bytes in temporary buffer. It is used for local variables.
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*/
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#define BUFFER_MAX 128
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/**
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* Maximum number of bytes in write buffer. It is used for local variables when
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* function needs to write a sysfs attribute.
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*/
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#define WRITE_BUFFER_SIZE 1024
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/**
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* This structure describes a device identifier. It consists of major and minor
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* attributes of device.
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*/
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struct device_id {
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int major, minor;
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};
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struct log_level_info {
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char prefix[10];
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int priority;
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};
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/**
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*/
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#define PREFIX_DEBUG " DEBUG: "
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#define PREFIX_WARNING "WARNING: "
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#define PREFIX_INFO " INFO: "
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#define PREFIX_ERROR " ERROR: "
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/**
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* This array describes a log levels priorities with message prefix .
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*/
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extern struct log_level_info log_level_infos[];
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/**
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* This global variable holds the name of binary file an application has been
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* executed from.
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*/
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extern char *progname;
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/**
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* @brief Reads integer value from a text file.
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*
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* This function assumes that the only text in a file is requested number to
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* read. In case of an error while reading from file the function will return
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* a value stored in defval argument.
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*
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* @param[in] path location of a file to be read.
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* @param[in] defval default value to return in case the file
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* does not exist.
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* @param[in] name name of a file to be read.
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*
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* @return Value read from a file if successful, otherwise a value stored in
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* defval argument.
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*/
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int get_int(const char *path, int defval, const char *name);
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/**
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* @brief Reads 64-bit unsigned integer from a text file.
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*
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* This function assumes that the only text in a file is requested number to
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* read. In case of an error while reading from file the function will return
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* a value stored in defval argument.
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*
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* @param[in] path Path where a file is located.
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* @param[in] defval Default value to be returned in case of error.
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* @param[in] name Name of a file to be read.
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*
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* @return Value read from a file if successful, otherwise a value stored in
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* defval argument.
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*/
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uint64_t get_uint64(const char *path, uint64_t defval, const char *name);
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/**
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* @brief Reads a content of a text file.
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*
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* This function reads a text file and return pointer to memory where the text
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* has been stored. The memory allocated by the function must be release as soon
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* as application does not require the content. Use free() function to give
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* allocated memory back to the system.
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*
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* @param[in] path Path where a file is located.
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* @param[in] name Name of a file to be read.
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*
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* @return Pointer to memory buffer if successful, otherwise NULL pointer.
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*/
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char *get_text(const char *path, const char *name);
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/**
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* @brief Reads boolean value from a text file.
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*
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* This function assumes that the only text in a file is the requested value to
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* read. The recognized boolean values are in the format 'Y' for True and 'N'
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* for False. In case of an error while reading from file the function will
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* return a value stored in defval argument.
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*
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* @param[in] path Path where a file is located.
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* @param[in] defval Default value to be returned in case of error.
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* @param[in] name Name of a file to be read.
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*
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* @return Value read from a file if successful, otherwise a value stored in
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* defval argument. 1 is returned for True, 0 for False.
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*/
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int get_bool(const char *path, int defval, const char *name);
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/**
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* @brief Writes a text to file.
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*
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* This function writes a text to a file and return the number of bytes written.
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* If the file does not exist or the value is incorrect the function returns -1
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* and errno has additional error information.
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*
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* @param[in] path Location of file to write.
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* @param[in] name Name of file to write.
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* @param[in] value Text to write to a file.
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*
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* @return The number of bytes written or -1 if an error occurred.
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*/
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int put_text(const char *path, const char *name, const char *value);
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/**
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* @brief Writes an integer value to a text file.
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*
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* This function writes an integer value to a text file. If the file does not
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* exist or the value is out of range the function returns -1 and errno variable
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* has additional error information.
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*
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* @param[in] path Location of file to write.
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* @param[in] name Name of file to write.
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* @param[in] value Integer value to write to a file.
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*
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* @return The number of bytes written or -1 if an error occurred.
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*/
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int put_int(const char *path, const char *name, int value);
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/**
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* @brief Scans directory for files.
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*
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* This function reads a directory specified in path argument and puts found
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* file on a list. The function puts a canonical paths on the list, however it
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* does not resolve any symbolic link.
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*
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* This function allocates memory for the list elements. The caller should free
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* it using list_erase().
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*
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* @param[in] path Path to directory to read.
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* @param[in] result Pointer to list where the directory contents
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* will be put.
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*
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* @return 0 on success, -1 on error.
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*/
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int scan_dir(const char *path, struct list *result);
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/**
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* @brief Writes a text to file.
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*
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* This function writes content of text buffer to file. If the file does not
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* exist or a content is invalid the function returns -1 and errno variable has
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* additional error information.
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*
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* @param[in] path Location and name of file to write to.
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* @param[in] buf Pointer to text buffer to write to a file.
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*
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* @return Number of bytes written if successful, otherwise -1 for an error.
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*/
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ssize_t buf_write(const char *path, const char *buf);
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/**
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* @brief Reads the content of a text file.
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*
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* The function reads the content of a text file and stores it to memory buffer
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* allocated. The function determines a size of the file and allocates required
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* amount of memory. User is required to free allocated memory as soon as
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* application does not require the content. Use free() function to give memory
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* back to the system pool. The function replaces last end-of-line character
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* with '\0' character.
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*
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* @param[in] path Path and name of file to read.
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*
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* @return Pointer to memory block if successful, otherwise NULL pointer.
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*/
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char *buf_read(const char *path);
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/**
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* @brief Gets major and minor of device.
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*
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* The function reads from text buffer the major and minor of block device.
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*
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* @param[in] buf Pointer to text buffer to interpret.
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* @param[out] did Placeholder where major and minor will be
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* stored.
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*
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* @return The function does not return a value.
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*/
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void get_id(const char *buf, struct device_id *did);
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/**
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* @brief Open a local log file.
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*
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* The function opens a file to write log messages. If the given file does not
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* exist the new one will be created. If the file already exist the file will be
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* opened in append mode and the pointer will be set at the end of a file.
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*
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* @param[in] path Location and name of a log file.
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*
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* @return The function returns 0 if successful, otherwise -1 and errno variable
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* has additional error information.
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*/
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int log_open(const char *path);
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/**
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* @brief Close a local log file.
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*
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* The function closes a local log file. If the file has not been opened the
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* function does nothing.
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*
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* @return The function does not return a value.
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*/
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void log_close(void);
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/**
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* @brief Logs an message with given loglevel.
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*
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* The function logs a message at given level of verbosity.
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*
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* @param[in] loglevel Level of verbosity for a message.
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* @param[in] buf Buffer containing format of a message.
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* @param[in] ... Additional arguments according to format of
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* a message.
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*
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* @return The function does not return a value.
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*/
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void _log(enum log_level_enum loglevel, const char *buf, ...);
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#define log_error(buf, ...) _log(LOG_LEVEL_ERROR, buf, ##__VA_ARGS__)
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#define log_debug(buf, ...) _log(LOG_LEVEL_DEBUG, buf, ##__VA_ARGS__)
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#define log_info(buf, ...) _log(LOG_LEVEL_INFO, buf, ##__VA_ARGS__)
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#define log_warning(buf, ...) _log(LOG_LEVEL_WARNING, buf, ##__VA_ARGS__)
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/**
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*/
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void set_invocation_name(char *invocation_name);
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db8df9 |
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/**
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* @brief Copies a text buffer.
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*
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* This function copies source text buffer to destination buffer. The function
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* always return a null-terminated buffer even if src does not fit in dest.
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*
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* @param[out] dest Pointer to destination buffer.
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* @param[in] src Pointer to source buffer.
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* @param[in] size Capacity of destination buffer in bytes.
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*
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* @return Pointer to destination buffer even if function failed.
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*/
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char *str_cpy(char *dest, const char *src, size_t size);
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/**
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* @brief Duplicates a text buffer.
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*
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* This function duplicates a text buffer. It allocates a new memory block and
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* copies the content of source buffer to new location. If pointer to source
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* buffer is NULL the function will return NULL, too. The caller is required to
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* free allocated memory as soon as content is not needed.
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*
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* @param[in] src Source buffer to duplicate the content.
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*
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* @return Pointer to allocated memory block if successful, otherwise NULL.
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*/
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char *str_dup(const char *src);
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/**
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*/
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char *truncate_path_component_rev(const char *path, int index);
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/**
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*/
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char *get_path_component_rev(const char *path, int index);
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/**
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* @brief Extracts the 'hostX' part from path.
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*/
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char *get_path_hostN(const char *path);
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int match_string(const char *string, const char *pattern);
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/**
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*/
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int get_log_fd(void);
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/**
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*/
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void print_opt(const char *long_opt, const char *short_opt, const char *desc);
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/**
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*/
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status_t set_log_path(const char *path);
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/**
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* Internal enumeration type. It is used to help parse command line arguments.
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*/
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enum opt {
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OPT_ALL,
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OPT_CONFIG,
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OPT_DEBUG,
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OPT_ERROR,
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OPT_HELP,
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OPT_INFO,
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OPT_INTERVAL,
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OPT_LOG,
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OPT_QUIET,
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OPT_VERSION,
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OPT_WARNING,
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OPT_LOG_LEVEL,
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OPT_LIST_CTRL,
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OPT_LISTED_ONLY,
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OPT_FOREGROUND,
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OPT_NULL_ELEMENT
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};
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extern struct option longopt_all[];
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void setup_options(struct option **longopt, char **shortopt, int *options,
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int options_nr);
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int get_option_id(const char *optarg);
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status_t set_verbose_level(int log_level);
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const char *ibpi2str(enum ibpi_pattern ibpi);
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#endif /* _UTILS_H_INCLUDED_ */
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