examples: add kobject-event

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

3 files changed, 56 insertions, 1 deletions

diff --git a/examples/Makefile.am b/examples/Makefile.am
index f6c2f69..e5cb052 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -1 +1 @@
-SUBDIRS = genl netfilter rtnl
+SUBDIRS = genl kobject netfilter rtnl
diff --git a/examples/kobject/Makefile.am b/examples/kobject/Makefile.am
new file mode 100644
index 0000000..9197f7a
--- /dev/null
+++ b/examples/kobject/Makefile.am
@@ -0,0 +1,6 @@
+include $(top_srcdir)/Make_global.am
+
+check_PROGRAMS = kobject-event
+
+kobject_event_SOURCES = kobject-event.c
+kobject_event_LDADD = ../../src/libmnl.la
diff --git a/examples/kobject/kobject-event.c b/examples/kobject/kobject-event.c
new file mode 100644
index 0000000..97debdf
--- /dev/null
+++ b/examples/kobject/kobject-event.c
@@ -0,0 +1,49 @@
+/* This example is placed in the public domain. */
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+
+#include <libmnl/libmnl.h>
+#include <linux/netlink.h>
+
+int main(int argc, char *argv[])
+{
+	struct mnl_socket *nl;
+	char buf[MNL_SOCKET_BUFFER_SIZE];
+	int ret;
+
+	nl = mnl_socket_open(NETLINK_KOBJECT_UEVENT);
+	if (nl == NULL) {
+		perror("mnl_socket_open");
+		exit(EXIT_FAILURE);
+	}
+
+	/* There is one single group in kobject over netlink */
+	if (mnl_socket_bind(nl, (1<<0), MNL_SOCKET_AUTOPID) < 0) {
+		perror("mnl_socket_bind");
+		exit(EXIT_FAILURE);
+	}
+
+	ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+	while (ret > 0) {
+		int i;
+
+		/* kobject uses a string based protocol, with no initial
+		 * netlink header.
+		 */
+		for (i=0; i<ret; i++)
+			printf("%c", buf[i]);
+
+		printf("\n");
+		ret = mnl_socket_recvfrom(nl, buf, sizeof(buf));
+	}
+	if (ret == -1) {
+		perror("error");
+		exit(EXIT_FAILURE);
+	}
+
+	mnl_socket_close(nl);
+
+	return 0;
+}