#!/bin/bash
#
#  sys [v0.2] 
#
#  conveniently provides *nix system info from /proc
#
# # # # # # # # # # # # # # # # # # # # # # # # # # # #
#  menu-driven or command-line read-out
#  usage: sys <proctype> <s[screen]|f[file]> 
#
#  (c) 2005 (or @ corz.org ;o)
#
#  ignore the internal structures, I'm just playing.
#

calc_uptime() {
# show me a better way..
	tdiff=${output}
	week=0;day=0;hour=0;min=0;sec=0
	while [ ${tdiff} -ge 604800 ]; do
		week=$(( ${week} + 1 )); tdiff=$(( ${tdiff} - 604800))
	done
	while [ ${tdiff} -ge 86400 ]; do
		day=$(( ${day} + 1 )); tdiff=$(( ${tdiff} - 86400))
	done
	while [ ${tdiff} -ge 3600 ]; do
		hour=$(( ${hour} + 1 )); tdiff=$(( $tdiff - 3600 ))
	done
	while [ ${tdiff} -ge 60 ]; do
		min=$(( ${min} + 1 )); tdiff=$(( ${tdiff} - 60 ))
	done
	while [ ${tdiff} -ge 1 ]; do
		sec=$(( ${sec} + 1 )); tdiff=$(( ${tdiff} - 1 ))
	done
	
	if [ ${week} -ge 1 ]; then 
		gw="${week} week"; 
		wdelim=", "; 
		if [ ${week} != 1 ]; then 
			wa=s; 
		fi
	fi
	if [ ${day} -ge 1 ]; then 
		gd="${day} day"; 
		ddelim=", "; 
		if [ ${day} != 1 ]; then 
			da=s; 
		fi
	fi
	if [ ${hour} -ge 1 ]; then 
		gh="${hour} hour"; 
		hdelim=", "; 
		if [ ${hour} != 1 ]; then 
			ha=s; 
		fi
	fi
	if [ ${min} -ge 1 ]; then 
		gm="${min} min"; 
		mdelim=", "; 
		if [ ${min} != 1 ]; then 
			ma=s; 
		fi
	fi
	if [ ${sec} != 1 ];then sa=s; fi

	output=" uptime: $gw$wa$wdelim$gd$da$ddelim$gh$ha$hdelim$gm$ma$mdelim$sec second$sa"
}

if [ "$1" = '' ]; then
	clear
	echo
	echo " view which system /proc information?"
	echo 
	echo " c    -   CPU info"
	echo " d    -   DMA's"
	echo " dv   -   devices"
	echo " f    -   filesystems (mounted + current implementations)"
	echo " i    -   i/o ports"
	echo " in   -   interrupts"
	echo " ks   -   exported kernel symbols (always to a file)"
	echo " l    -   load averages"
	echo " m    -   memory info"
	echo " mod  -   modules (like lsmod, but yellow)"
	echo " p    -   pci info"
	echo " s    -   stats"
	echo " u    -   uptime (human-readable)"
	echo " v    -   system version info"
	echo ""
	echo " note: you can add these on the command line, eg..  sys u"
	echo "       which would display your uptime directly on your screen"
	echo " "

	read procwhat
	if [ "$procwhat" = '' ]; then echo " nothing selected!"; echo; exit; fi
	if [ "$procwhat" = 'ks' ]; then out=f; fi
	if [ "$out" != 'f' ]; then
		echo
		echo " output to file? (f), or screen? (just hit enter) "
		echo
		echo " note: you can add this on the command-line, too, eg..  sys u f"
		echo "       otherwise sys defaults to screen output"
		echo " "
		read out
		echo ""
	fi
else
	procwhat=$1
fi

case $procwhat in 
	'c') output=`cat /proc/cpuinfo` ;;
	'd') output=`cat /proc/dma` ;;
	'dv') output=`cat /proc/devices` ;;
	'f') output=`cat /proc/filesystems`; echo ""; df -h; echo ""; echo ;;
	'i') output=`cat /proc/ioports` ;;
	'in') output=`cat /proc/interrupts` ;;
	'ks') output=`cat /proc/ksyms`; out=f ;;
	'l') output=`cat /proc/loadavg` ;;
	'lk') output=`cat /proc/locks`;  ;;
	'm') output=`cat /proc/meminfo`;  ;;
	'mod') output=`cat /proc/modules`; echo; echo "module			size	used by.." ;;
	'p') output=`cat /proc/pci` ;;
	's') output=`cat /proc/stat`;;
	'u') output=`cat /proc/uptime | awk 'BEGIN { FS = "." } { print $(NF-2) }'`; calc_uptime ;;
	'v') output=`cat /proc/version`;;
	'misc') output=`cat /proc/misc` ;;

	*) echo "unknown option!"; echo; exit
esac

if [ "$2" = 'f' ] || [ "$out" = 'f' ]; then
	echo "${output}" > ~/sys.out
	echo "output has been saved to ~/sys.out"
else
	echo
	echo "${output}"
	echo
fi

exit 0