[Toybox] nproc(1)

[Rob Landley]

On 4/29/24 16:56, enh via Toybox wrote:
> isn't nproc(1) just a call to sysconf(3) with either
> _SC_NPROCESSORS_ONLN for regular behavior, or _SC_NPROCESSORS_CONF for
> --all?

>From musl src/conf/sysconf.c:

        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;

Musl returns the same thing for "conf" and "online".

Rob