X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;ds=sidebyside;f=src%2Fdaemon%2Fcommon.c;h=05b119901ce2bf9a606a4e07c1ed45b7c2d78ce7;hb=3d74a63ae43c1786eb9b966e2209c24c5643dae8;hp=c6559a804e3b003c45e2566c466c7f5413b2d6f3;hpb=ee830b46965eac77e608d536c51d15062b9842bb;p=collectd.git

diff --git a/src/daemon/common.c b/src/daemon/common.c
index c6559a80..05b11990 100644
--- a/src/daemon/common.c
+++ b/src/daemon/common.c
@@ -60,6 +60,10 @@
 # include <arpa/inet.h>
 #endif
 
+#ifdef HAVE_SYS_CAPABILITY_H
+# include <sys/capability.h>
+#endif
+
 #ifdef HAVE_LIBKSTAT
 extern kstat_ctl_t *kc;
 #endif
@@ -1668,3 +1672,52 @@ void strarray_free (char **array, size_t array_len) /* {{{ */
 		sfree (array[i]);
 	sfree (array);
 } /* }}} void strarray_free */
+
+#ifdef HAVE_SYS_CAPABILITY_H
+int check_capability (int capability) /* {{{ */
+{
+#ifdef _LINUX_CAPABILITY_VERSION_3
+	cap_user_header_t cap_header = calloc(1, sizeof (*cap_header));
+	if (cap_header == NULL)
+	{
+		ERROR("check_capability: calloc failed");
+		return (-1);
+	}
+
+	cap_user_data_t cap_data = calloc(1, sizeof (*cap_data));
+	if (cap_data == NULL)
+	{
+		ERROR("check_capability: calloc failed");
+		sfree(cap_header);
+		return (-1);
+	}
+
+	cap_header->pid = getpid();
+	cap_header->version = _LINUX_CAPABILITY_VERSION;
+	if (capget(cap_header, cap_data) < 0)
+	{
+		ERROR("check_capability: capget failed");
+		sfree(cap_header);
+		sfree(cap_data);
+		return (-1);
+	}
+
+	if ((cap_data->effective & (1 << capability)) == 0)
+	{
+		sfree(cap_header);
+		sfree(cap_data);
+		return (-1);
+	}
+	else
+	{
+		sfree(cap_header);
+		sfree(cap_data);
+		return (0);
+	}
+#else
+	WARNING ("check_capability: unsupported capability implementation. "
+	    "Some plugin(s) may require elevated privileges to work properly.");
+	return (0);
+#endif /* _LINUX_CAPABILITY_VERSION_3 */
+} /* }}} int check_capability */
+#endif /* HAVE_SYS_CAPABILITY_H */