init

trq/trq.c

@@ -0,0 +1,173 @@
+/*
+ * trq.c
+ *
+ *  Created on: 17 авг. 2022 г.
+ *      Author: Alexander Zhirov
+ *      Mail: alexander@zhirov.website
+ *      Telegram: alexanderzhirov
+ */
+
+#include "trq.h"
+
+#include <syslog.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <regex.h>
+
+void ts_free(ts_args *args)
+{
+    if (args)
+    {
+        if (args->command)
+            free(args->command);
+        if (args->file_src)
+            free(args->file_src);
+        if (args->file_dst)
+            free(args->file_dst);
+        if (args->path_src)
+            free(args->path_src);
+        if (args->command)
+            free(args->path_dst);
+        free(args);
+    }
+}
+
+static char* ts_concat_path(const char *file)
+{
+    if (!file)
+    {
+        syslog(LOG_NOTICE, "TRQ Invalid value file (ts_concat_path)\n");
+        exit(3);
+    }
+    const char *path_mac = "mac.cfg/";
+    size_t len1 = strlen(path_mac);
+    size_t len2 = strlen(file);
+    char *result = (char*) malloc(sizeof(char) * (len1 + len2 + 1));
+    if (!result)
+    {
+        syslog(LOG_NOTICE, "TRQ Disk full or allocation exceeded (ts_concat_path)\n");
+        exit(3);
+    }
+    strncpy(result, path_mac, (len1 + 1));
+    strncpy(result + len1, file, (len2 + 1));
+    return result;
+}
+
+static char* ts_copy_string(const char *string)
+{
+    if (!string)
+        return NULL;
+    int len = strlen(string);
+    char *tmp = (char*) calloc(1, sizeof(char) * (len + 1));
+    if (!tmp)
+    {
+        syslog(LOG_NOTICE, "TRQ Disk full or allocation exceeded (ts_copy_string)\n");
+        exit(3);
+    }
+    strncpy(tmp, string, (len + 1));
+    return tmp;
+}
+
+ts_args* ts_get_arguments(const char *filename, const char *path)
+{
+    ts_args *args = (ts_args*) calloc(1, sizeof(ts_args));
+    if (!args)
+    {
+        syslog(LOG_NOTICE, "TRQ Disk full or allocation exceeded (ts_get_arguments)\n");
+        exit(3);
+    }
+    char separator[2] = ";\0";
+    char *part = NULL;
+    int len = strlen(filename);
+    int next = 1; /* reading the next iteration */
+    char *tmp_filename = (char*) calloc(1, sizeof(char) * (len + 1));
+    if (!tmp_filename)
+    {
+        syslog(LOG_NOTICE, "TRQ Disk full or allocation exceeded (ts_get_arguments)\n");
+        exit(3);
+    }
+    strncpy(tmp_filename, filename, (len + 1));
+    part = strtok(tmp_filename, separator);
+    while (part)
+    {
+        switch (args->size)
+        {
+        case 0:
+            regex_t regex;
+            regcomp(&regex, "^01-[0-9a-f]{2}(-[0-9a-f]{2}){5}$", REG_EXTENDED);
+            int reti = regexec(&regex, part, 0, NULL, 0);
+            if (reti)
+            {
+                syslog(LOG_NOTICE, "TRQ The MAC address was entered incorrectly (ts_get_arguments)\n");
+                exit(100);
+            }
+            args->file_dst = ts_copy_string(part);
+            args->path_dst = ts_concat_path(part);
+            break;
+        case 1:
+            if (!strncmp("cr", part, 3)) {}
+            else if (!strncmp("rm", part, 3))
+                next = 0;
+            else
+            {
+                syslog(LOG_NOTICE, "TRQ The command was specified incorrectly (ts_get_arguments)\n");
+                exit(100);
+            }
+            args->command = ts_copy_string(part);
+            break;
+        case 2:
+            args->file_src = ts_copy_string(part);
+            args->path_src = ts_concat_path(part);
+            break;
+        default:
+            syslog(LOG_NOTICE, "TRQ Invalid request format (ts_get_arguments)\n");
+            exit(100);
+        }
+        ++args->size;
+        if (next)
+            part = strtok(NULL, separator);
+        else
+            part = NULL;
+    }
+    free(tmp_filename);
+    if (!args->size)
+    {
+        free(args);
+        args = NULL;
+    }
+    return args;
+}
+
+void ts_syslog(const ts_args *args)
+{
+    if (args)
+    {
+        if (args->size > 2)
+            syslog(LOG_NOTICE, "TRQ Create symlink %s on %s\n", args->file_dst, args->file_src);
+        else
+            syslog(LOG_NOTICE, "TRQ Remove symlink %s\n", args->file_dst);
+    }
+}
+
+void ts_symlink(const ts_args *args)
+{
+    if (args)
+    {
+        if (args->size > 2)
+        {
+            if (access(args->path_src, F_OK) == 0 && !symlink(args->file_src, args->path_dst))
+                syslog(LOG_NOTICE, "TRQ A symbolic link %s has been created\n", args->file_dst);
+            else
+                syslog(LOG_NOTICE, "TRQ Failed to create symbolic link %s. %s\n", args->file_dst, strerror(errno));
+        }
+        else
+        {
+            if (access(args->path_dst, F_OK) == 0 && !unlink(args->path_dst))
+                syslog(LOG_NOTICE, "TRQ A symbolic link %s has been removed\n", args->file_dst);
+            else
+                syslog(LOG_NOTICE, "TRQ Failed to remove symbolic link %s. %s\n", args->file_dst, strerror(errno));
+        }
+    }
+}