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Date: Tue, 24 Jan 2006 15:56:57 -0200
From: Rainer Alves <rainer.alves@gmail.com>
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To: Fernan Aguero <fernan@iib.unsam.edu.ar>
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Cc: freebsd-ports@freebsd.org
Subject: Re: porting an app that checks /proc/meminfo
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Fernan Aguero wrote:
> The program builds fine, but because it uses /proc/meminfo
> to check for available memory, when you run it, it will
> complain about the lack of /proc/meminfo and won't let you
> do anything. 
> 
...
> How does one gets the values of i) memory used by the
> program/process and ii) amount of RAM available in the
> computer without using /proc/meminfo in FreeBSD? 

Take a loot at sysutils/muse, which uses /dev/mem to gather this info:

[rainer@bsd ~]$ muse -m
kvm_open: /dev/mem: Permission denied
kvm_open failed

[rainer@bsd ~]$ sudo muse -m
Active:      311.965 MB
Inactive:     54.039 MB
Wired:        99.977 MB
Reserved:      0.961 MB
Cache:        25.812 MB
Kernel:        0.133 MB
Interrupt:     0.008 MB
Buffer:       59.969 MB

Total:       493.637 MB
Free:          1.141 MB