From dc8703206e3f0f69605c56d0e1127f7e17f3476a Mon Sep 17 00:00:00 2001
From: Jan Sucan <sucanjan@fit.cvut.cz>
Date: Tue, 4 Jun 2019 14:34:27 +0200
Subject: Initial commit

---
 testing/yup-comm/yup-comm-client.c | 80 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 testing/yup-comm/yup-comm-client.c

(limited to 'testing/yup-comm/yup-comm-client.c')

diff --git a/testing/yup-comm/yup-comm-client.c b/testing/yup-comm/yup-comm-client.c
new file mode 100644
index 0000000..d6cc8e4
--- /dev/null
+++ b/testing/yup-comm/yup-comm-client.c
@@ -0,0 +1,80 @@
+/* Author: Jan Sucan */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+
+#include "mailslot.h"
+
+#define MAILSLOT_SERVER_NAME  "\\\\.\\Mailslot\\yup-comm-server"
+#define MAILSLOT_CLIENT_NAME  "\\\\.\\Mailslot\\yup-comm-client"
+#define MAILSLOT_MAX_MSG_SIZE 400
+
+HANDLE mailslot_server = INVALID_HANDLE_VALUE;
+HANDLE mailslot_client = INVALID_HANDLE_VALUE;
+
+void
+print_msg(FILE * stream, const char * format, ...)
+{
+  char buf[1024];
+  
+  va_list args;
+  va_start(args, format);
+  vsnprintf(buf, 1024, format, args);
+  va_end(args);
+
+  fprintf(stream, "    yup-comm-client: %s%s", (stream == stderr) ? "ERROR: " : "" , buf);
+  fflush(stream);
+}
+
+void
+clean_exit(int code)
+{
+  if (mailslot_server != INVALID_HANDLE_VALUE) {
+    CloseHandle(mailslot_server);
+  }
+  
+  exit(code);
+}
+
+void
+usage(void)
+{
+  printf("Usage: yup-comm-client  CMD\n");
+  printf("  CMD  command for yup-comm-server\n");
+  clean_exit(1);
+}
+
+int
+main(int argc, char ** argv)
+{
+  if (argc != 2) {
+    print_msg(stderr, "Missing argument\n");
+    usage();
+  } if (strlen(argv[1]) > MAILSLOT_MAX_MSG_SIZE) {
+    print_msg(stderr, "The command is too long (> 400 characters)\n");
+    clean_exit(1);
+  }  
+
+  if ((mailslot_client = mailslot_create(MAILSLOT_CLIENT_NAME)) == INVALID_HANDLE_VALUE) {
+    print_msg(stderr, "Cannot create mailslot for receiving reply from the server\n");
+    clean_exit(1);
+  }
+  
+  if ((mailslot_server = mailslot_connect(MAILSLOT_SERVER_NAME)) == INVALID_HANDLE_VALUE) {
+    print_msg(stderr, "Cannot open server's mailslot\n");
+    clean_exit(1);
+  }
+
+  if (mailslot_write(mailslot_server, argv[1], strlen(argv[1]) + 1U) != 0) {
+    print_msg(stderr, "Cannot send command to the server\n");
+    clean_exit(1);    
+  }
+  
+  print_msg(stdout, "Waiting for reply from the server ...\n");
+  
+  char c;
+  mailslot_read(mailslot_client, &c, sizeof(c));
+
+  clean_exit(0);
+}
-- 
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