Fix ram_free for Linux

[slstatus.git] / components / ram.c

diff --git a/components/ram.c b/components/ram.c
index 62e9807..f451601 100644 (file)
--- a/components/ram.c
+++ b/components/ram.c
@@ -9,7 +9,11 @@
        {
                long free;
 
-               return (pscanf("/proc/meminfo", "MemFree: %ld kB\n", &free) == 1) ?
+               return (pscanf("/proc/meminfo",
+                              "MemTotal: %ld kB\n"
+                              "MemFree: %ld kB\n"
+                              "MemAvailable: %ld kB\n",
+                              &free, &free, &free) == 3) ?
                       bprintf("%f", (float)free / 1024 / 1024) : NULL;
        }
 
@@ -59,6 +63,9 @@
        #include <sys/types.h>
        #include <unistd.h>
 
+       #define LOG1024         10
+       #define pagetok(size, pageshift) ((size) << (pageshift - LOG1024))
+
        inline int
        load_uvmexp(struct uvmexp *uvmexp)
        {
@@ -79,8 +86,7 @@
 
                if (load_uvmexp(&uvmexp)) {
                        free_pages = uvmexp.npages - uvmexp.active;
-                       free = (double) (free_pages * uvmexp.pagesize) / 1024 /
-                              1024 / 1024;
+                       free = (float)(pagetok(free_pages, uvmexp.pageshift)) / 1024 / 1024;
                        return bprintf("%f", free);
                }
 
@@ -108,8 +114,7 @@
                float total;
 
                if (load_uvmexp(&uvmexp)) {
-                       total = (double) (uvmexp.npages * uvmexp.pagesize) /
-                               1024 / 1024 / 1024;
+                       total = (float)(pagetok(uvmexp.npages, uvmexp.pageshift)) / 1024 / 1024;
                        return bprintf("%f", total);
                }
 
@@ -123,8 +128,7 @@
                float used;
 
                if (load_uvmexp(&uvmexp)) {
-                       used = (double) (uvmexp.active * uvmexp.pagesize) /
-                              1024 / 1024 / 1024;
+                       used = (float)(pagetok(uvmexp.active, uvmexp.pageshift)) / 1024 / 1024;
                        return bprintf("%f", used);
                }