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/**
* @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);
}
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