Separate display from sampling in SysArch and Hostname Meters

Several of our newer meters have merged coding concerns in terms
of extracting values and displaying those values.  This commit
rectifies that for the SysArch and Hostname meters, allowing use
of this code with alternative front/back ends.  The SysArch code
is also refined to detect whether the platform has an os-release
file at all and/or the sys/utsname.h header via configure.ac.

1 files changed, 3 insertions, 3 deletions

diff --git a/HostnameMeter.c b/HostnameMeter.c
index af8e3493..924def11 100644
--- a/HostnameMeter.c
+++ b/HostnameMeter.c
@@ -8,6 +8,7 @@ in the source distribution for its full text.
 #include "config.h" // IWYU pragma: keep
 
 #include "HostnameMeter.h"
+#include "Platform.h"
 
 #include <unistd.h>
 
@@ -19,9 +20,8 @@ static const int HostnameMeter_attributes[] = {
    HOSTNAME
 };
 
-static void HostnameMeter_updateValues(Meter* this, char* buffer, size_t size) {
-   (void) this;
-   gethostname(buffer, size - 1);
+static void HostnameMeter_updateValues(ATTR_UNUSED Meter* this, char* buffer, size_t size) {
+   Platform_getHostname(buffer, size);
 }
 
 const MeterClass HostnameMeter_class = {