3 files changed, 14 insertions, 6 deletions
diff --git a/libvxi11client/client.c b/libvxi11client/client.c
index f0d9629..d9bb107 100644
--- a/libvxi11client/client.c
+++ b/libvxi11client/client.c
@@ -172,7 +172,8 @@ int main(int argc, char *argv[]) {
 		printf("\n");
 
 		// docmd
-		if ((err = vxi11_docmd(&ctx, 0x00, false)) > 0)
+		int dataoutlen;
+		if ((err = vxi11_docmd(&ctx, NULL, 0, NULL, 0, &dataoutlen, 0x00, false)) > 0)
 			printf("did command, should fail!\n");
 		else
 			printf("Error calling docmd; %s\n", geterrorstring(err));
diff --git a/libvxi11client/libvxi11client.c b/libvxi11client/libvxi11client.c
index 66bb020..f504def 100644
--- a/libvxi11client/libvxi11client.c
+++ b/libvxi11client/libvxi11client.c
@@ -234,7 +234,8 @@ int vxi11_read(VXI11Context* context, char* buffer, unsigned int bufferlen, bool
  * call docmd with the specified command
  */
 
-int vxi11_docmd(VXI11Context* context, unsigned long cmd, bool waitforlock) {
+int vxi11_docmd(VXI11Context* context, char* datain, int datainlen, char* dataout, int outbufferlen, int* dataoutlen,
+		unsigned long cmd, bool waitforlock) {
 	if (context->clnt == NULL)
 		return 0;
 
@@ -242,12 +243,17 @@ int vxi11_docmd(VXI11Context* context, unsigned long cmd, bool waitforlock) {
 			.io_timeout = VXI11_DEFAULT_TIMEOUT, .lock_timeout = VXI11_DEFAULT_TIMEOUT, .cmd = cmd, .network_order = 0,
 			.datasize = 0 };
 
-	params.data_in.data_in_len = 0;
-	params.data_in.data_in_val = NULL;
+	params.data_in.data_in_len = datainlen;
+	params.data_in.data_in_val = datain;
 
 	Device_DocmdResp* resp = device_docmd_1(&params, context->clnt);
-	if (resp != NULL && resp->error == 0)
+	if (resp != NULL && resp->error == 0) {
+		if (dataout != NULL)
+			strncpy(dataout, resp->data_out.data_out_val,
+					(resp->data_out.data_out_len > outbufferlen ? outbufferlen : resp->data_out.data_out_len));
+		*dataoutlen = resp->data_out.data_out_len;
 		return 1;
+	}
 	else if (resp == NULL)
 		return 0;
 	else
diff --git a/libvxi11client/libvxi11client.h b/libvxi11client/libvxi11client.h
index 740e3d3..ff301d3 100644
--- a/libvxi11client/libvxi11client.h
+++ b/libvxi11client/libvxi11client.h
@@ -41,5 +41,6 @@ int vxi11_destroy_intr_chan(VXI11Context* context);
 int vxi11_enable_srq(VXI11Context* context, bool enable, char* handle);
 int vxi11_start_interrupt_server(void (*callback)(char* handle));
 int vxi11_stop_interrupt_server();
-int vxi11_docmd(VXI11Context* context, unsigned long cmd, bool waitforlock);
+int vxi11_docmd(VXI11Context* context, char* datain, int datainlen, char* dataout, int outbufferlen, int* dataoutlen,
+		unsigned long cmd, bool waitforlock);
 int vxi11_close(VXI11Context* context);