[PATCH 3/4] linux: Use /sys/devices/system/cpu/possible on __get_nprocs_conf

[Florian Weimer]

* Florian Weimer:

> * Adhemerval Zanella via Libc-alpha:
>
>> +      /* The entry is in the form of '[cpuX]-[cpuY]'.  */
>> +      char buf[2 * INT_STRLEN_BOUND (unsigned int) + 1];
>> +
>> +      ssize_t n = __read_nocancel (fd, buf, sizeof (buf));
>> +      if (n > 0)
>> +	{
>> +	  buf[n] = '\0';
>> +
>> +	  /* Start on the right, to find highest node number.  */
>> +	  int m = 1;
>> +	  while (--n)
>> +	    {
>> +	      if ((buf[n] == ',') || (buf[n] == '-'))
>> +		break;
>> +	      /* Ignore '\n'  */
>> +	      if (! isdigit (buf[n]))
>> +		continue;
>> +	      result += (buf[n] - '0') * m;
>> +	      m *= 10;
>> +	    }
>> +	}
>> +
>> +      __close_nocancel (fd);
>> +      return result + 1;
>>      }
>
> I think the /online and /possible files have the same layout, so you
> could use both.

Sorry, I meant to write: “so you could use *one parser for* both”

Florian