Constantine A. Murenin wrote: > You can't get them all at once with one sysctl(3) call, as the memory > they occupy is not allocated continuously -- a linked list is used, > and each driver does sensor allocation on its own, and it's not a > sysctl(3) job to merge this linked list together into an array. >
Ah, thanks. From that perspective I can see that the use of the term "array" in the sysctl(3) man page under HW_SENSORS doesn't necessarily mean a literal array being written in the *oldp buffer; I hope the confusion was at least understandable, though. According to the source, `/sbin/sysctl hw.sensors` calls its own main parsing routine 256 times to check each of the 256 possible sensors and allocates its own list from the results. Eek. Since I'm just writing a voltage monitor I suppose I could have it do that once on init and then just monitor the specific sensors it finds relevant, assuming I can convince myself that the numbers are assigned once at bootup (or at least do not change once assigned). Thanks again, Weldon
