added netcheck

1 files changed, 65 insertions, 0 deletions

diff --git a/netcheck.c b/netcheck.c
new file mode 100644
index 0000000..ce07bc2
--- /dev/null
+++ b/netcheck.c
@@ -0,0 +1,65 @@
+#include <stdio.h>
+#include <errno.h>
+#include <time.h>
+
+#define TMP "/tmp/netcheck_test.txt"
+
+#define ETH_DOWN_CURR fileread("/sys/class/net/eth0/statistics/rx_bytes")
+#define ETH_UP_CURR  fileread("/sys/class/net/eth0/statistics/tx_bytes")
+#define WLAN_DOWN_CURR fileread("/sys/class/net/wlan0/statistics/rx_bytes")
+#define WLAN_UP_CURR fileread("/sys/class/net/wlan0/statistics/tx_bytes")
+
+int con_size(double i){
+if       (i > 1000000) 
+	printf(" %1.1lfM", i / 1000000) ;
+else if  (i > 1000  ) 
+	printf(" %3.0lfK", i / 1000) ;
+else                 
+	printf(" %3.0lfB", i);
+}
+
+int fileread(char *fi)
+{
+    FILE *f; unsigned long i;
+    f = fopen(fi, "r");
+    fscanf(f, "%ld", &i);
+    fclose(f);
+    return i;
+}
+
+int main()
+{
+unsigned long curr_down, curr_up;
+unsigned long former_down, former_up, former_time;
+unsigned long curr_time = time(NULL);
+
+curr_down = WLAN_DOWN_CURR + ETH_DOWN_CURR ;
+curr_up = WLAN_UP_CURR + ETH_UP_CURR ;
+
+FILE *tmp_file;
+tmp_file = fopen(TMP, "r");
+if (tmp_file != NULL) 
+{
+	fscanf(tmp_file, "%d %d %ld",	&former_down,
+					&former_up,
+					&former_time);
+	fclose(tmp_file);
+
+	unsigned short time_diff = curr_time - former_time;
+
+	printf("DOWN"); 
+	con_size((curr_down - former_down) / time_diff);
+	printf(" UP");
+	con_size((curr_up   - former_up)   / time_diff);
+	printf("\n");
+	}
+else  
+    printf("DOWN    X UP    X\n");
+
+    tmp_file = fopen(TMP, "w");
+    fprintf(tmp_file,"%ld %ld %ld",	curr_down,
+		    			curr_up,
+					curr_time);
+    fclose(tmp_file);
+}
+