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authorRich Felker <dalias@aerifal.cx>2014-04-15 18:45:21 -0400
committerRich Felker <dalias@aerifal.cx>2014-04-15 18:45:21 -0400
commit96315d27b0e5000d53e09fb915c5066b3d47d3d2 (patch)
tree4643143db6b5eaa04a4e124b8f988d0370d29e47 /src/conf
parentde20a8ffc5cf89134f035193ce1cdc2d76c88ee0 (diff)
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add _SC_PHYS_PAGES and _SC_AVPHYS_PAGES extentions to sysconf
Diffstat (limited to 'src/conf')
-rw-r--r--src/conf/sysconf.c19
1 files changed, 17 insertions, 2 deletions
diff --git a/src/conf/sysconf.c b/src/conf/sysconf.c
index 9ac52a10..bf433d6b 100644
--- 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];
}