From aa9ebc1be8bcf6b544ec2e8b54b611227fbf6420 Mon Sep 17 00:00:00 2001
From: Georges Da Costa <dacosta@irit.fr>
Date: Mon, 27 Apr 2020 18:18:32 +0200
Subject: [PATCH] Adds the capability to detect the network device
automatically
---
mojitos.c | 2 +-
network.c | 12 ++++++++++++
2 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/mojitos.c b/mojitos.c
index d8a888c..0e66a83 100644
--- a/mojitos.c
+++ b/mojitos.c
@@ -95,7 +95,7 @@ void usage(char** argv) {
printf("-p activates performance counters\n");
printf(" perf_list is coma separated list of performance counters without space. Ex: instructions,cache_misses\n");
printf("-l lists the possible performance counters and quits\n");
- printf("-d activates network monitoring\n");
+ printf("-d activates network monitoring (if network_device is X tries to detect it automatically)\n");
printf("-s activates statistics of overhead in nanoseconds\n");
printf("-u activates report of system load\n");
exit(EXIT_SUCCESS);
diff --git a/network.c b/network.c
index 7dfd18b..0c03cb5 100644
--- a/network.c
+++ b/network.c
@@ -20,10 +20,22 @@
#include <stdio.h>
#include <stdlib.h>
+#include <string.h>
char **init_network(char* dev) {
if(dev==NULL)
return NULL;
+
+ if(strcmp(dev,"X")==0) {
+ FILE* f = fopen("/proc/net/route", "r");
+ char buffer[1000];
+ fgets(buffer, 999, f);
+ fgets(buffer, 999, f);
+ char *end_of_dev = index(buffer, '\t');
+ *end_of_dev='\0';
+ dev = buffer;
+ }
+
char *filenames[] = {"/sys/class/net/%s/statistics/rx_packets",
"/sys/class/net/%s/statistics/rx_bytes",
"/sys/class/net/%s/statistics/tx_packets",
--
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