add _SC_PHYS_PAGES and _SC_AVPHYS_PAGES extentions to sysconf

diff --git a/src/conf/sysconf.c b/src/conf/sysconf.c
index 9ac52a10ff80ce754c87309808ec78fb8ff02565..bf433d6b4f24c8fec042306badcd5d35d31c2e6f 100644 (file)
--- a/src/conf/sysconf.c
+++ b/src/conf/sysconf.c
@@ -3,6 +3,7 @@
 #include <errno.h>
 #include <sys/resource.h>
 #include <signal.h>
+#include <sys/sysinfo.h>
 #include "syscall.h"
 #include "libc.h"
 
@@ -14,6 +15,8 @@
 #define JT_SEM_VALUE_MAX JT(5)
 #define JT_NPROCESSORS_CONF JT(6)
 #define JT_NPROCESSORS_ONLN JT(7)
+#define JT_PHYS_PAGES JT(8)
+#define JT_AVPHYS_PAGES JT(9)
 
 #define RLIM(x) (-32768|(RLIMIT_ ## x))
 
@@ -105,8 +108,8 @@ long sysconf(int name)
                [_SC_THREAD_PROCESS_SHARED] = VER,
                [_SC_NPROCESSORS_CONF] = JT_NPROCESSORS_CONF,
                [_SC_NPROCESSORS_ONLN] = JT_NPROCESSORS_ONLN,
-               [_SC_PHYS_PAGES] = -1,
-               [_SC_AVPHYS_PAGES] = -1,
+               [_SC_PHYS_PAGES] = JT_PHYS_PAGES,
+               [_SC_AVPHYS_PAGES] = JT_AVPHYS_PAGES,
                [_SC_ATEXIT_MAX] = -1,
                [_SC_PASS_MAX] = -1,
                [_SC_XOPEN_VERSION] = _XOPEN_VERSION,
@@ -252,6 +255,18 @@ long sysconf(int name)
                for (i=cnt=0; i<sizeof set; i++)
                        for (; set[i]; set[i]&=set[i]-1, cnt++);
                return cnt;
+       case JT_PHYS_PAGES & 255:
+       case JT_AVPHYS_PAGES & 255: ;
+               unsigned long long mem;
+               int __lsysinfo(struct sysinfo *);
+               struct sysinfo si;
+               __lsysinfo(&si);
+               if (!si.mem_unit) si.mem_unit = 1;
+               if (name==_SC_PHYS_PAGES) mem = si.totalram;
+               else mem = si.freeram + si.bufferram;
+               mem *= si.mem_unit;
+               mem /= PAGE_SIZE;
+               return (mem > LONG_MAX) ? LONG_MAX : mem;
        }
        return values[name];
 }