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Linux sysinfo gathering:
cpuinfo is obtained from parsing /proc/cpuinfo.
This can be convoluted at times, especially since every stable
kernel release seems to change the format.
Thankfully with the advent of the 'cpuinfo' instruction things
have stabalized a bit.
Some complex parsing goes on to give cleaner output.
os_info is obtained using the uname() function.
hostname is also obtained using the uname() function
memory is obtained by a fstat() on /proc/kcore
this sometimes ends up a Megabyte short if ACPI or APM
are in use.
Other methods are available.
+ /proc/meminfo tends to always turn up a few megabytes short
because it ignores reserved and kernel memory
+ the sysinfo() function has similar problems
uptime is obtained from /proc/uptime
loadaverage is obtained from /proc/loadavg
+ this is proc filesystem dependent of course.
Maybe I should look into sysinfo()
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