Recipe: Recovering Additional Device Information
Both sysctl() and sysctlbyname() enable you to retrieve system information. These standard UNIX functions query the operating system about hardware and OS details. You can get a sense of the kind of scope on offer by glancing at the /usr/include/sys/sysctl.h include file on the Macintosh. There you can find an exhaustive list of constants that can be used as parameters to these functions.
These constants enable you to check for core information such as the system’s CPU count, the amount of available memory, and more. Recipe 14-2 demonstrates this functionality. It introduces a UIDevice category that gathers system information and returns it via a series of method calls.
You might wonder why this ...
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