add simplest modbus relay management

modbus_relay/cmdlnopts.h

@@ -0,0 +1,49 @@
+/*
+ * This file is part of the modbus_relay project.
+ * Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <usefull_macros.h>
+
+/*
+ * here are some typedef's for global data
+ */
+typedef struct{
+    int verbose;        // verbose level
+    int baudrate;       // interface baudrate (default: 9600)
+    int setall;         // set all relays
+    int resetall;       // reset all relays
+    int nodenum;        // node number (default: 1)
+    int readn;          // read node number
+    int setn;           // set node number
+    int **setrelay;     // set relay number N
+    int **resetrelay;   // reset relay number N
+    int **getinput;     // read Nth input
+    int **getrelay;     // read Nth relay
+    char *logfile;      // logfile name
+    char *device;       // serial device path (default: /dev/ttyUSB0)
+} glob_pars;
+
+extern glob_pars  GP;
+extern sl_loglevel_e verblvl;
+void parse_args(int argc, char **argv);
+void verbose(sl_loglevel_e lvl, const char *fmt, ...);
+
+#define VMSG(...)   verbose(LOGLEVEL_MSG, __VA_ARGS__)
+#define VDBG(...)   verbose(LOGLEVEL_DBG, __VA_ARGS__)
+#define VANY(...)   verbose(LOGLEVEL_ANY, __VA_ARGS__)