inverter.cpp: avoid mess in simultaneous read/write operations

dilyanpalauzov · Apr 9, 2022 · a059b86 · a059b86
1 parent d30d7e6
commit a059b86
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/sources/inverter-cli/inverter.cpp b/sources/inverter-cli/inverter.cpp
@@ -79,6 +79,10 @@ bool cInverter::query(const char *cmd, int replysize) {
         return false;
     }
 
+    struct flock lock;
+    memset (&lock, 0, sizeof(struct flock));
+    lock.l_type = F_WRLCK;
+    fcntl (fd, F_SETLKW, &lock);
 
     // Once connected, set the baud rate and other serial config (Don't rely on this being correct on the system by default...)
     speed_t baud = B2400;