[PATCH] ifaces: skip properly header in /proc/net/dev

[Nikola Pajkovsky]

header definition is hidden in kernel tree under net/core/dev.c in dev_seq_show.

	"Inter-|   Receive                            "
	"                    |  Transmit\n"
	" face |bytes    packets errs drop fifo frame "
	"compressed multicast|bytes    packets errs "
	"drop fifo colls carrier compressed\n"

Signed-off-by: Nikola Pajkovsky <npajkovs(a)redhat.com&gt;
---
 src/ifaces.c | 25 +++++++++++++------------
 1 file changed, 13 insertions(+), 12 deletions(-)

diff --git a/src/ifaces.c b/src/ifaces.c
index a3a7b08..c14af0a 100644
--- a/src/ifaces.c
+++ b/src/ifaces.c
@@ -17,21 +17,22 @@ ifaces.c - routine that determines whether a given interface is
supported
  * at the top of the file.
  */
 
-FILE *open_procnetdev(void)
-{
-	FILE *fd;
-	char buf[161];
 
-	fd = fopen("/proc/net/dev", "r");
+/* taken from net/core/dev.c: dev_seq_show */
+#define NET_DEV_START_TOKEN				\
+	"Inter-|   Receive                            " \
+	"                    |  Transmit\n"		\
+	" face |bytes    packets errs drop fifo frame " \
+	"compressed multicast|bytes    packets errs "	\
+	"drop fifo colls carrier compressed\n"
 
-	/*
-	 * Read and discard the table header lines in the file
-	 */
+FILE *open_procnetdev(void)
+{
+	FILE *fd = fopen("/proc/net/dev", "r");
+	if (!fd)
+		return NULL;
 
-	if (fd != NULL) {
-		fgets(buf, 160, fd);
-		fgets(buf, 160, fd);
-	}
+	fseek(fd, strlen(NET_DEV_START_TOKEN), SEEK_SET);
 
 	return fd;
 }
-- 
1.7.12