Question

Is there any Mac OS X equivalent header file for sysinfo.h in Linux. I am porting code from Linux to Mac but the structure struct sysinfo is not found.

Edit: ==More info==
In Linux platform I use a Header file <sys/sysinfo.h> which is not found in Mac.
By including the header in Linux I perform following operation:
struct sysinfo s;
sysinfo(&s);

Which in result give me some system related info.
Now as I porting my project from Linux to Mac I want to know is there any similar functionality serve by Mac.

Please help.

Thanks in advance.

Answer 1

The closest equivalent to sysinfo in Mac OS X is sysctl / MIB. It doesn’t return a sysinfo struct directly, but most of the values in that structure are available as sysctl keys. For instance:

• uptime is approximated by kern.boottime (although that reflects the actual boot time, not the running time)
• loads is available as vm.loadavg
• totalram = hw.memsize (in bytes)
• freeram, sharedram, and bufferram are complicated, as the XNU memory manager works differently from Linux’s. I’m not sure if the closest equivalent values (“active” and “inactive” memory) are exposed.
• totalswap and freeswap are reflected in vm.swapusage. (But note that OS X allocates swap space dynamically.)
• procs doesn’t appear to have any equivalent.
• totalhigh and freehigh are specific to i386 Linux.