1 files changed, 68 insertions, 0 deletions
diff --git a/src/collectors/apps.plugin/apps_proc_meminfo.c b/src/collectors/apps.plugin/apps_proc_meminfo.c
new file mode 100644
index 000000000..a7227c213
--- /dev/null
+++ b/src/collectors/apps.plugin/apps_proc_meminfo.c
@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "apps_plugin.h"
+
+kernel_uint_t MemTotal = 0;
+
+#ifdef __FreeBSD__
+static inline bool get_MemTotal_per_os(void) {
+    int mib[2] = {CTL_HW, HW_PHYSMEM};
+    size_t size = sizeof(MemTotal);
+    if (sysctl(mib, 2, &MemTotal, &size, NULL, 0) == -1) {
+        netdata_log_error("Failed to get total memory using sysctl");
+        return false;
+    }
+    // FreeBSD returns bytes; convert to kB
+    MemTotal /= 1024;
+    return true;
+}
+#endif // __FreeBSD__
+
+#ifdef __APPLE__
+static inline bool get_MemTotal_per_os(void) {
+    int mib[2] = {CTL_HW, HW_MEMSIZE};
+    size_t size = sizeof(MemTotal);
+    if (sysctl(mib, 2, &MemTotal, &size, NULL, 0) == -1) {
+        netdata_log_error("Failed to get total memory using sysctl");
+        return false;
+    }
+    // MacOS returns bytes; convert to kB
+    MemTotal /= 1024;
+    return true;
+}
+#endif // __APPLE__
+
+#if !defined(__FreeBSD__) && !defined(__APPLE__)
+static inline bool get_MemTotal_per_os(void) {
+    char filename[FILENAME_MAX + 1];
+    snprintfz(filename, FILENAME_MAX, "%s/proc/meminfo", netdata_configured_host_prefix);
+
+    procfile *ff = procfile_open(filename, ": \t", PROCFILE_FLAG_DEFAULT);
+    if(!ff)
+        return false;
+
+    ff = procfile_readall(ff);
+    if(!ff)
+        return false;
+
+    size_t line, lines = procfile_lines(ff);
+
+    for(line = 0; line < lines ;line++) {
+        size_t words = procfile_linewords(ff, line);
+        if(words == 3 && strcmp(procfile_lineword(ff, line, 0), "MemTotal") == 0 && strcmp(procfile_lineword(ff, line, 2), "kB") == 0) {
+            kernel_uint_t n = str2ull(procfile_lineword(ff, line, 1), NULL);
+            if(n) MemTotal = n;
+            break;
+        }
+    }
+
+    procfile_close(ff);
+
+    return true;
+}
+#endif
+
+void get_MemTotal(void) {
+    if(!get_MemTotal_per_os())
+        MemTotal = 0;
+}