From: Rohit Raj <redacted>

Certain bus objects may need to be closed and re-acquired
while terminating and rerunning the client application.
Hence a signal handler is required to catch the termination
of the App and hence closing the bus objects.

This patch adds the missing signal handler in the client
app and closes the Bus objects in both client and server
applications when the signal Handler is called.

Signed-off-by: Rohit Raj <redacted>
---
  .../multi_process/client_server_mp/mp_client/Makefile |  1 +
  .../multi_process/client_server_mp/mp_client/client.c | 11 +++++++++++
  .../multi_process/client_server_mp/mp_server/main.c   |  4 +++-
  3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/examples/multi_process/client_server_mp/mp_client/Makefile b/examples/multi_process/client_server_mp/mp_client/Makefile
index 7c447feba..9fdc74e61 100644
--- a/examples/multi_process/client_server_mp/mp_client/Makefile
+++ b/examples/multi_process/client_server_mp/mp_client/Makefile

@@ -14,6 +14,7 @@ APP = mp_client
  # all source are stored in SRCS-y
  SRCS-y := client.c
  
+CFLAGS += -DALLOW_EXPERIMENTAL_API

  CFLAGS += $(WERROR_FLAGS) -O3
  CFLAGS += -I$(SRCDIR)/../shared
  CFLAGS += -DALLOW_EXPERIMENTAL_API

diff --git a/examples/multi_process/client_server_mp/mp_client/client.c b/examples/multi_process/client_server_mp/mp_client/client.c
index 361d90b54..a81be8849 100644
--- a/examples/multi_process/client_server_mp/mp_client/client.c
+++ b/examples/multi_process/client_server_mp/mp_client/client.c

@@ -11,6 +11,7 @@
  #include <stdlib.h>
  #include <getopt.h>
  #include <string.h>
+#include <signal.h>
  
  #include <rte_common.h>
  #include <rte_malloc.h>

@@ -196,6 +197,14 @@ handle_packet(struct rte_mbuf *buf)
  
  }
  
+static void
+signal_handler(int signal)
+{
+	if (signal == SIGINT)
+		rte_bus_close();

+	exit(0);
+}
+
  /*
   * Application main function - loops through
   * receiving and processing packets. Never returns

@@ -217,6 +226,8 @@ main(int argc, char *argv[])
  	argc -= retval;
  	argv += retval;
  
+	signal(SIGINT, signal_handler);
+
  	if (parse_app_args(argc, argv) < 0)
  		rte_exit(EXIT_FAILURE, "Invalid command-line arguments\n");
  

diff --git a/examples/multi_process/client_server_mp/mp_server/main.c b/examples/multi_process/client_server_mp/mp_server/main.c
index 280dab867..a5ac84d85 100644
--- a/examples/multi_process/client_server_mp/mp_server/main.c
+++ b/examples/multi_process/client_server_mp/mp_server/main.c

@@ -275,11 +275,13 @@ signal_handler(int signal)
  {
  	uint16_t port_id;
  
-	if (signal == SIGINT)
+	if (signal == SIGINT) {
  		RTE_ETH_FOREACH_DEV(port_id) {
  			rte_eth_dev_stop(port_id);
  			rte_eth_dev_close(port_id);
  		}
+		rte_bus_close();
+	}
  	exit(0);
  }