X-Git-Url: https://git.octo.it/?p=collectd.git;a=blobdiff_plain;f=src%2Fdns.c;h=be6d0dcb4223684e31c62e51a903ae0f853e83ef;hp=15fa15a79099b1faf28af0a20ef9a629eacc2ad2;hb=e5e5d99350fa54e22f07b90fbc3102df51565ad9;hpb=6e8d9b2fa6018a1ed1ec8ab3b6551110449a997c

diff --git a/src/dns.c b/src/dns.c
index 15fa15a7..be6d0dcb 100644
--- a/src/dns.c
+++ b/src/dns.c
@@ -35,6 +35,10 @@
 
 #include <pcap.h>
 
+#ifdef HAVE_SYS_CAPABILITY_H
+# include <sys/capability.h>
+#endif
+
 /*
  * Private data types
  */
@@ -347,6 +351,20 @@ static int dns_init (void)
 
 	listen_thread_init = 1;
 
+#ifdef HAVE_SYS_CAPABILITY_H
+	if (check_capability (CAP_NET_RAW) != 0)
+	{
+		if (getuid () == 0)
+			WARNING ("dns plugin: Running collectd as root, but the CAP_NET_RAW "
+					"capability is missing. The plugin's read function will probably "
+					"fail. Is your init system dropping capabilities ?");
+		else
+			WARNING ("dns plugin: collectd doesn't have the CAP_NET_RAW capability. "
+					"If you don't want to run collectd as root, try running \"setcap "
+					"cap_net_raw=ep\" on the collectd binary.");
+	}
+#endif
+
 	return (0);
 } /* int dns_init */