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, 10 insertions, 0 deletions

diff --git a/unsupported/Platform.c b/unsupported/Platform.c
index 5791acca..9dc457b7 100644
--- a/unsupported/Platform.c
+++ b/unsupported/Platform.c
@@ -64,6 +64,8 @@ const MeterClass* const Platform_meterTypes[] = {
    NULL
 };
 
+static const char Platform_unsupported[] = "unsupported";
+
 void Platform_init(void) {
    /* no platform-specific setup needed */
 }
@@ -146,3 +148,11 @@ void Platform_getBattery(double* percent, ACPresence* isOnAC) {
    *percent = NAN;
    *isOnAC = AC_ERROR;
 }
+
+void Platform_getHostname(char* buffer, size_t size) {
+   String_safeStrncpy(buffer, Platform_unsupported, size);
+}
+
+void Platform_getRelease(char** string) {
+    *string = xStrdup(Platform_unsupported);
+}