Adding upstream version 3.1.0+dfsg.

Signed-off-by: Daniel Baumann <daniel@debian.org>

tools/lint/configuration.c

@@ -0,0 +1,125 @@
+/**
+ * @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).", 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).", 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.", yl_dir);
+            if (mkdir(yl_dir, 00700)) {
+                if (errno != EEXIST) {
+                    /* parallel execution, yay */
+                    YLMSG_E("Configuration directory \"%s\" cannot be created (%s).", yl_dir, strerror(errno));
+                    free(yl_dir);
+                    return NULL;
+                }
+            }
+        } else {
+            YLMSG_E("Configuration directory \"%s\" exists but cannot be accessed (%s).", 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).", 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.");
+    } else if (linenoiseHistoryLoad(history_file)) {
+        YLMSG_E("Failed to load history.");
+    }
+
+    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).", strerror(errno));
+        free(yl_dir);
+        return;
+    }
+
+    sprintf(history_file, "%s/history", yl_dir);
+    if (linenoiseHistorySave(history_file)) {
+        YLMSG_E("Failed to save history.");
+    }
+
+    free(history_file);
+    free(yl_dir);
+}