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add _SC_PHYS_PAGES and _SC_AVPHYS_PAGES extentions to sysconf

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This commit is contained in:
Rich Felker 2014-04-15 18:45:21 -04:00
parent de20a8ffc5
commit 96315d27b0
1 changed files with 17 additions and 2 deletions
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19
src/conf/sysconf.c
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@ -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];
}