From b1ebf046fb4780fdb90a30b670dc13b5f62b37d1 Mon Sep 17 00:00:00 2001
From: root
Date: Tue, 16 Dec 2014 19:13:53 +0100
Subject: Fixed some minor bugs and added warning about virtual memory.

---
 bin/checkswap    | 75 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 bin/checkswap.sh | 73 ------------------------------------------------------
 2 files changed, 75 insertions(+), 73 deletions(-)
 create mode 100755 bin/checkswap
 delete mode 100755 bin/checkswap.sh

diff --git a/bin/checkswap b/bin/checkswap
new file mode 100755
index 0000000..b3a9a31
--- /dev/null
+++ b/bin/checkswap
@@ -0,0 +1,75 @@
+#!/bin/bash
+
+# order by
+by="swap"
+
+# reverse sort
+rev="r"
+
+if [ ! -z "$1" ]; then
+	case "$1" in
+		-s|--swap|swap)
+			by="swap"
+			shift
+			;;
+		-m|--memory|mem|memory)
+			by="memory"
+			shift
+			;;
+		-n|--name|-p|--process|--program|name|proc|process)
+			by="name"
+			rev=""
+			shift
+			;;
+		-h|--help|help)	
+			echo "Statistics about memory and swap usage from all running processes."
+			echo "Usage: $0 [OPTION]"
+			echo "	swap	sort by swap usage (default)"
+			echo "	memory	sort by memory usage"
+			echo "	name	sort by process name"
+			echo "	help	print this help message"
+			exit 0 
+			;;
+		*)
+			echo "Unrecognized option \"$1\"" >&2
+			echo "Try \"-h\" instead."
+			exit 1
+	esac
+fi
+
+echo "Check memory and swap usage for all programs sorted by $by."
+echo "$(tput setaf 1)Attention! The reported memory usage is just the $(tput bold)virtual$(tput sgr0) $(tput setaf 1)usage, not the $(tput bold)real$(tput sgr0) $(tput setaf 1)one."
+echo "Read more about this on Wikipedia. $(tput bold)https://en.wikipedia.org/wiki/Virtual_memory$(tput sgr0)"
+echo ""
+
+# loop over all running programs
+for CMD in $(top -bn1 | tail -n +8 | grep -v $(basename "$0") | awk '{print $12}' | sort | uniq)
+do
+	swap_count=0
+	mem_count=0
+
+	# loop over all pids and check for 'VmSize' and 'VmSwap' state in /proc/$PID/status
+	for tmp in $( for PID in $(pgrep $CMD 2>/dev/null); do grep -E 'Vm(Size|Swap)' /proc/$PID/status 2>/dev/null | paste - - | awk '{print $2 "|" $5}'; done )
+	do 
+		mem_count=$(($mem_count+$(echo $tmp | cut -d\| -f1)))
+		swap_count=$(($swap_count+$(echo $tmp | cut -d\| -f2)))
+	done
+
+	# programs swap or memory use is not null
+	if [ $swap_count -gt 0 ] || [ $mem_count -gt 0 ]
+	then
+		case "$by" in
+			swap)
+				echo "$swap_count kB (Swap): $CMD $mem_count kB (Memory)"
+				;;
+			memory)
+				echo "$mem_count kB (Memory): $CMD $swap_count kB (Swap)"
+				;;
+			name)
+				echo "$CMD: $mem_count kB (Memory) $swap_count kB (Swap)"
+				;;
+		esac
+	fi
+
+# sorting and formatting output
+done | sort -k1 -t\  -h${rev} | column -t
diff --git a/bin/checkswap.sh b/bin/checkswap.sh
deleted file mode 100755
index 82ea867..0000000
--- a/bin/checkswap.sh
+++ /dev/null
@@ -1,73 +0,0 @@
-#!/bin/bash
-
-# order by
-by="swap"
-
-# reverse sort
-rev="r"
-
-if [ ! -z "$1" ]; then
-	case "$1" in
-		-s|--swap|swap)
-			by="swap"
-			shift
-			;;
-		-m|--memory|mem|memory)
-			by="memory"
-			shift
-			;;
-		-n|--name|-p|--process|--program|name|proc|process)
-			by="name"
-			rev=""
-			shift
-			;;
-		-h|--help|help)	
-			echo "Statistics about all running processes."
-			echo "Usage: $0 [OPTION]"
-			echo "	swap	sort by swap usage (default)"
-			echo "	memory	sort by memory usage"
-			echo "	name	sort by process name"
-			echo "	help	print this help message"
-			exit 0 
-			;;
-		*)
-			echo "Unrecognized option \"$1\"" >&2
-			echo "Try -h instead."
-			exit 1
-	esac
-fi
-
-echo "Check memory and swap usage for all programs sorted by $by."
-echo ""
-
-# loop over all running programs
-for CMD in $(top -bn1 | tail -n +8 | grep -v $(basename "$0") | awk '{print $12}' | sort | uniq)
-do
-	swap_count=0
-	mem_count=0
-
-	# loop over all pids and check for 'VmSize' and 'VmSwap' state in /proc/$PID/status
-	for tmp in $( for PID in $(pgrep $CMD 2>/dev/null); do grep -E 'Vm(Size|Swap)' /proc/$PID/status 2>/dev/null | paste - - | awk '{print $2 "|" $5}'; done )
-	do 
-		mem_count=$(($mem_count+$(echo $tmp | cut -d\| -f1)))
-		swap_count=$(($swap_count+$(echo $tmp | cut -d\| -f2)))
-	done
-
-	# programs swap use is not null
-	if [ $swap_count -gt 0 ]
-	then
-		case "$by" in
-			swap)
-				echo "$swap_count kB (Swap): $CMD $mem_count kB (Memory)"
-				;;
-			memory)
-				echo "$mem_count kB (Memory): $CMD $swap_count kB (Swap)"
-				;;
-			name)
-				echo "$CMD: $mem_count kB (Memory) $swap_count kB (Swap)"
-				;;
-		esac
-	fi
-
-# sort by swap usage
-done | sort -k1 -t\  -h${rev} | column -t
-- 
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