diff options
Diffstat (limited to 'idkey')
| -rw-r--r-- | idkey/CMakeLists.txt | 24 | ||||
| -rw-r--r-- | idkey/main.c | 127 |
2 files changed, 0 insertions, 151 deletions
diff --git a/idkey/CMakeLists.txt b/idkey/CMakeLists.txt deleted file mode 100644 index 02206a9..0000000 --- a/idkey/CMakeLists.txt +++ /dev/null @@ -1,24 +0,0 @@ -########################################################################### -# Copyright 2015, 2016, 2017 IoT.bzh -# -# author: Loïc Collignon <loic.collignon@iot.bzh> -# -# Licensed under the Apache License, Version 2.0 (the "License"); -# you may not use this file except in compliance with the License. -# You may obtain a copy of the License at -# -# http://www.apache.org/licenses/LICENSE-2.0 -# -# Unless required by applicable law or agreed to in writing, software -# distributed under the License is distributed on an "AS IS" BASIS, -# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -# See the License for the specific language governing permissions and -# limitations under the License. -########################################################################### - -cmake_minimum_required(VERSION 3.3) -project(idkey) -add_executable(idkey main.c) -install(TARGETS idkey - RUNTIME DESTINATION bin - LIBRARY DESTINATION lib) diff --git a/idkey/main.c b/idkey/main.c deleted file mode 100644 index 16b2232..0000000 --- a/idkey/main.c +++ /dev/null @@ -1,127 +0,0 @@ -#include <fcntl.h> -#include <stdarg.h> -#include <stdint.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> - -#define EXIT_SUCCESS 0 -#define EXIT_CMDLINE 1 -#define EXIT_FILEOPEN 2 -#define EXIT_FILEREAD 3 -#define EXIT_FILEWRITE 4 -#define EXIT_INVALID 5 -#define EXIT_ALLOC 6 - -#define BLOCK_SIZE 4096 - -/// @brief Header of the datas. -typedef struct header_ -{ - char mn[4]; - size_t size; -} header; - -/// @brief Check if the @c v is a valid magick number. -/// @param[in] v magick number. -/// @return 1 if valid, zero otherwise. -int is_valid_nm(const char* v) -{ - return v && v[0] == 'I' && v[1] == 'D' && v[2] == 'K' && v[3] == 'Y'; -} - -/// @brief Close the file descriptor if valid then print a formatted error message then return the specified code. -/// @param[in] fd File descriptor to close. -/// @param[in] code The exit code to return. -/// @param[in] format The message to print. -/// @param[in] ... Values for formatting. -/// @return The exit code provided by @c code. -int close_and_fail(int fd, int code, const char* format, ...) -{ - va_list arglist; - fprintf(stderr, "Error: "); - va_start(arglist, format); - vfprintf(stderr, format, arglist); - va_end(arglist); - fprintf(stderr, "\n"); - return code; -} - -/// @brief Read the device @c devname and print it's data to stdout. -/// @param[in] devname Device's name. -/// @return Exit code, zero if success. -int read_device(const char* devname) -{ - int fd = open(devname, O_RDONLY); - if (fd == -1) return close_and_fail(fd, EXIT_FILEOPEN, "Failed to open '%s'!", devname); - - header h; - ssize_t sz = read(fd, &h, sizeof(header)); - if (sz != sizeof(header)) return close_and_fail(fd, EXIT_FILEREAD, "Failed to read the header!"); - if (!is_valid_nm(h.mn)) return close_and_fail(fd, EXIT_INVALID, "Not a valid identity key!"); - - while(h.size) - { - char datas[BLOCK_SIZE + 1]; - memset(datas, BLOCK_SIZE +1, 0); - size_t count = BLOCK_SIZE > h.size ? h.size : BLOCK_SIZE; - - sz = read(fd, datas, count); - - if (sz != count) close_and_fail(fd, EXIT_FILEREAD, "Failed to read a data block!"); - h.size = (h.size - count); - - printf(datas); - } - printf("\n"); - close(fd); - return EXIT_SUCCESS; -} - -/// @brief Write the specified data to the specified device. -/// @param[in] devname Name of the device. -/// @param[in] datas Datas to write. -/// @return Exit code, zero if success, non-zero otherwise. -int write_device(const char* devname, const char* datas) -{ - header h = { - .mn = {'I', 'D', 'K', 'Y'}, - .size = strlen(datas) - }; - if (h.size < 1) return close_and_fail(-1, EXIT_CMDLINE, "No data to write!"); - - int fd = open(devname, O_WRONLY); - if (fd == -1) return close_and_fail(fd, EXIT_FILEOPEN, "Failed to open device '%s'!", devname); - if (write(fd, &h, sizeof(header)) != sizeof(header)) return close_and_fail(fd, EXIT_FILEWRITE, "Failed to write the header!"); - if (write(fd, datas, h.size) != h.size) return close_and_fail(fd, EXIT_FILEWRITE, "Failed to write datas!"); - - close(fd); - return EXIT_SUCCESS; -} - -/// @brief Entry point. -/// @param[in] argc Number of arguments in @c argv. -/// @param[in] argv Arguments array. -/// @return Exit code, zero if success, non-zero otherwise. -int main(int argc, char** argv) -{ - switch(argc) - { - case 0: - case 1: - fprintf(stderr, "ERROR: too few arguments!\n"); - return EXIT_CMDLINE; - - case 2: // Read the device - return read_device(argv[1]); - - case 3: // Write the device - return write_device(argv[1], argv[2]); - - default: - fprintf(stderr, "ERROR: too many arguments!\n"); - return EXIT_CMDLINE; - } -} - |