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libc: provide number of CPUs for sysctl&sysconf

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Fixes #3786
This commit is contained in:
Alexander Boettcher 2020-06-17 16:53:15 +02:00 committed by Norman Feske
parent 3fb5ae4fdc
commit 2471410fe5
1 changed files with 9 additions and 4 deletions
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13
repos/libports/src/lib/libc/sysctl.cc
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@ -49,12 +49,15 @@ extern "C" long sysconf(int name)
switch (name) {
case _SC_CHILD_MAX: return CHILD_MAX;
case _SC_OPEN_MAX: return getdtablesize();
case _SC_NPROCESSORS_CONF: return 1;
case _SC_NPROCESSORS_ONLN: return 1;
case _SC_PAGESIZE: return PAGESIZE;
case _SC_PHYS_PAGES:
return _global_env->pd().ram_quota().value / PAGESIZE;
case _SC_NPROCESSORS_CONF:
[[fallthrough]];
case _SC_NPROCESSORS_ONLN: {
Affinity::Space space = _global_env->cpu().affinity_space();
return space.total() ? : 1;
}
default:
warning(__func__, "(", name, ") not implemented");
return Errno(EINVAL);
@ -155,7 +158,9 @@ extern "C" int __sysctl(const int *name, u_int namelen,
return 0;
case HW_NCPU:
*(int*)oldp = 1;
Affinity::Space space = _global_env->cpu().affinity_space();
*(int*)oldp = space.total() ? : 1;
*oldlenp = sizeof(int);
return 0;