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Diffstat (limited to 'src/conf/sysconf.c')
-rw-r--r--src/conf/sysconf.c55
1 files changed, 35 insertions, 20 deletions
diff --git a/src/conf/sysconf.c b/src/conf/sysconf.c
index 12e81368..e225c3dd 100644
--- a/src/conf/sysconf.c
+++ b/src/conf/sysconf.c
@@ -6,15 +6,21 @@
#include "syscall.h"
#include "libc.h"
-#define VER (-2)
-#define OFLOW (-3)
-#define CPUCNT (-4)
+#define JT(x) (-256|(x))
+#define VER JT(1)
+#define JT_ARG_MAX JT(2)
+#define JT_MQ_PRIO_MAX JT(3)
+#define JT_PAGE_SIZE JT(4)
+#define JT_SEM_VALUE_MAX JT(5)
+#define JT_NPROCESSORS_CONF JT(6)
+#define JT_NPROCESSORS_ONLN JT(7)
+
#define RLIM(x) (-32768|(RLIMIT_ ## x))
long sysconf(int name)
{
static const short values[] = {
- [_SC_ARG_MAX] = OFLOW,
+ [_SC_ARG_MAX] = JT_ARG_MAX,
[_SC_CHILD_MAX] = RLIM(NPROC),
[_SC_CLK_TCK] = 100,
[_SC_NGROUPS_MAX] = 32,
@@ -42,12 +48,12 @@ long sysconf(int name)
[_SC_AIO_PRIO_DELTA_MAX] = 0, /* ?? */
[_SC_DELAYTIMER_MAX] = _POSIX_DELAYTIMER_MAX,
[_SC_MQ_OPEN_MAX] = -1,
- [_SC_MQ_PRIO_MAX] = OFLOW,
+ [_SC_MQ_PRIO_MAX] = JT_MQ_PRIO_MAX,
[_SC_VERSION] = VER,
- [_SC_PAGE_SIZE] = OFLOW,
+ [_SC_PAGE_SIZE] = JT_PAGE_SIZE,
[_SC_RTSIG_MAX] = _NSIG - 1 - 31 - 3,
[_SC_SEM_NSEMS_MAX] = SEM_NSEMS_MAX,
- [_SC_SEM_VALUE_MAX] = OFLOW,
+ [_SC_SEM_VALUE_MAX] = JT_SEM_VALUE_MAX,
[_SC_SIGQUEUE_MAX] = -1,
[_SC_TIMER_MAX] = -1,
[_SC_BC_BASE_MAX] = _POSIX2_BC_BASE_MAX,
@@ -97,8 +103,8 @@ long sysconf(int name)
[_SC_THREAD_PRIO_INHERIT] = -1,
[_SC_THREAD_PRIO_PROTECT] = -1,
[_SC_THREAD_PROCESS_SHARED] = VER,
- [_SC_NPROCESSORS_CONF] = CPUCNT,
- [_SC_NPROCESSORS_ONLN] = CPUCNT,
+ [_SC_NPROCESSORS_CONF] = JT_NPROCESSORS_CONF,
+ [_SC_NPROCESSORS_ONLN] = JT_NPROCESSORS_ONLN,
[_SC_PHYS_PAGES] = -1,
[_SC_AVPHYS_PAGES] = -1,
[_SC_ATEXIT_MAX] = -1,
@@ -215,28 +221,37 @@ long sysconf(int name)
[_SC_THREAD_ROBUST_PRIO_INHERIT] = -1,
[_SC_THREAD_ROBUST_PRIO_PROTECT] = -1,
};
+
if (name > sizeof(values)/sizeof(values[0])) {
errno = EINVAL;
return -1;
- } else if (values[name] == VER) {
+ } else if (values[name] >= -1) {
+ return values[name];
+ } else if (values[name] < -256) {
+ long lim[2];
+ __syscall(SYS_getrlimit, values[name]&16383, lim);
+ return lim[0] < 0 ? LONG_MAX : lim[0];
+ }
+
+ switch ((unsigned char)values[name]) {
+ case VER & 255:
return _POSIX_VERSION;
- } else if (values[name] == OFLOW) {
- if (name == _SC_ARG_MAX) return ARG_MAX;
- if (name == _SC_SEM_VALUE_MAX) return SEM_VALUE_MAX;
- if (name == _SC_MQ_PRIO_MAX) return MQ_PRIO_MAX;
- /* name == _SC_PAGE_SIZE */
+ case JT_ARG_MAX & 255:
+ return ARG_MAX;
+ case JT_MQ_PRIO_MAX & 255:
+ return MQ_PRIO_MAX;
+ case JT_PAGE_SIZE & 255:
return PAGE_SIZE;
- } else if (values[name] == CPUCNT) {
+ case JT_SEM_VALUE_MAX & 255:
+ return SEM_VALUE_MAX;
+ case JT_NPROCESSORS_CONF & 255:
+ case JT_NPROCESSORS_ONLN & 255: ;
unsigned char set[128] = {1};
int i, cnt;
__syscall(SYS_sched_getaffinity, 0, sizeof set, set);
for (i=cnt=0; i<sizeof set; i++)
for (; set[i]; set[i]&=set[i]-1, cnt++);
return cnt;
- } else if (values[name] < OFLOW) {
- long lim[2];
- __syscall(SYS_getrlimit, values[name]&16383, lim);
- return lim[0] < 0 ? LONG_MAX : lim[0];
}
return values[name];
}