| /** |
| * @file configuration.c |
| * @author Michal Vasko <mvasko@cesnet.cz> |
| * @brief yanglint configuration |
| * |
| * Copyright (c) 2017 CESNET, z.s.p.o. |
| * |
| * This source code is licensed under BSD 3-Clause License (the "License"). |
| * You may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * https://opensource.org/licenses/BSD-3-Clause |
| */ |
| |
| #include "configuration.h" |
| |
| #include <errno.h> |
| #include <pwd.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| #include <unistd.h> |
| |
| #include "linenoise/linenoise.h" |
| |
| #include "common.h" |
| |
| /* Yanglint home (appended to ~/) */ |
| #define YL_DIR ".yanglint" |
| |
| char * |
| get_yanglint_dir(void) |
| { |
| int ret; |
| struct passwd *pw; |
| char *user_home, *yl_dir; |
| |
| if (!(pw = getpwuid(getuid()))) { |
| YLMSG_E("Determining home directory failed (%s).\n", strerror(errno)); |
| return NULL; |
| } |
| user_home = pw->pw_dir; |
| |
| yl_dir = malloc(strlen(user_home) + 1 + strlen(YL_DIR) + 1); |
| if (!yl_dir) { |
| YLMSG_E("Memory allocation failed (%s).\n", strerror(errno)); |
| return NULL; |
| } |
| sprintf(yl_dir, "%s/%s", user_home, YL_DIR); |
| |
| ret = access(yl_dir, R_OK | X_OK); |
| if (ret == -1) { |
| if (errno == ENOENT) { |
| /* directory does not exist */ |
| YLMSG_W("Configuration directory \"%s\" does not exist, creating it.\n", yl_dir); |
| if (mkdir(yl_dir, 00700)) { |
| if (errno != EEXIST) { |
| /* parallel execution, yay */ |
| YLMSG_E("Configuration directory \"%s\" cannot be created (%s).\n", yl_dir, strerror(errno)); |
| free(yl_dir); |
| return NULL; |
| } |
| } |
| } else { |
| YLMSG_E("Configuration directory \"%s\" exists but cannot be accessed (%s).\n", yl_dir, strerror(errno)); |
| free(yl_dir); |
| return NULL; |
| } |
| } |
| |
| return yl_dir; |
| } |
| |
| void |
| load_config(void) |
| { |
| char *yl_dir, *history_file; |
| |
| if ((yl_dir = get_yanglint_dir()) == NULL) { |
| return; |
| } |
| |
| history_file = malloc(strlen(yl_dir) + 9); |
| if (!history_file) { |
| YLMSG_E("Memory allocation failed (%s).\n", strerror(errno)); |
| free(yl_dir); |
| return; |
| } |
| |
| sprintf(history_file, "%s/history", yl_dir); |
| if (access(history_file, F_OK) && (errno == ENOENT)) { |
| YLMSG_W("No saved history.\n"); |
| } else if (linenoiseHistoryLoad(history_file)) { |
| YLMSG_E("Failed to load history.\n"); |
| } |
| |
| free(history_file); |
| free(yl_dir); |
| } |
| |
| void |
| store_config(void) |
| { |
| char *yl_dir, *history_file; |
| |
| if ((yl_dir = get_yanglint_dir()) == NULL) { |
| return; |
| } |
| |
| history_file = malloc(strlen(yl_dir) + 9); |
| if (!history_file) { |
| YLMSG_E("Memory allocation failed (%s).\n", strerror(errno)); |
| free(yl_dir); |
| return; |
| } |
| |
| sprintf(history_file, "%s/history", yl_dir); |
| if (linenoiseHistorySave(history_file)) { |
| YLMSG_E("Failed to save history.\n"); |
| } |
| |
| free(history_file); |
| free(yl_dir); |
| } |