Turbostat: Only check capabilities if supported

diff --git a/configure.ac b/configure.ac
index 0f9f33b..ba62910 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -589,6 +589,8 @@ AC_CHECK_HEADERS(net/pfvar.h,
 have_termios_h="no"
 AC_CHECK_HEADERS(termios.h, [have_termios_h="yes"])
 
+# For the turbostat plugin
+AC_CHECK_HEADERS(sys/capability.h)
 #
 # Checks for typedefs, structures, and compiler characteristics.
 #

diff --git a/src/turbostat.c b/src/turbostat.c
index 648ec40..61c2abd 100644 (file)
--- a/src/turbostat.c
+++ b/src/turbostat.c
@@ -42,7 +42,9 @@
 
 #include <asm/msr-index.h>
 #include <cpuid.h>
+#ifdef HAVE_SYS_CAPABILITY_H
 #include <sys/capability.h>
+#endif /* HAVE_SYS_CAPABILITY_H */
 
 #define PLUGIN_NAME "turbostat"
 
@@ -1463,15 +1465,24 @@ out:
 static int
 check_permissions(void)
 {
+#ifdef HAVE_SYS_CAPABILITY_H
        struct __user_cap_header_struct cap_header_data;
        cap_user_header_t cap_header = &cap_header_data;
        struct __user_cap_data_struct cap_data_data;
        cap_user_data_t cap_data = &cap_data_data;
        int ret = 0;
+#endif /* HAVE_SYS_CAPABILITY_H */
 
        if (getuid() == 0) {
                /* We have everything we need */
                return 0;
+#ifndef HAVE_SYS_CAPABILITY_H
+       } else {
+               ERROR("Turbostat plugin: Initialization failed: this plugin "
+                     "requires collectd to run as root");
+               return -1;
+       }
+#else /* HAVE_SYS_CAPABILITY_H */
        }
 
        /* check for CAP_SYS_RAWIO */
@@ -1504,6 +1515,7 @@ check_permissions(void)
                      "collectd a special capability (CAP_SYS_RAWIO) and read "
                       "access to /dev/cpu/*/msr (see previous warnings)");
        return ret;
+#endif /* HAVE_SYS_CAPABILITY_H */
 }
 
 static int