dont print all stats as default (add more options for selecting system stats to print)

Author: rainu

scripts/systemStats.sh

@@ -1,18 +1,72 @@
 #!/bin/sh
 
-MEMORY_STATS=$(cat /proc/meminfo | sed 's/://g' | awk '{ print "\""$1"\":{\"value\":"$2",\"unit\":\""$3"\"},"}' | tr -d '\n' | sed 's/,$//')
-IO_STATS=$(iostat -d -k | grep "[0-9]$" | sed 's/,/./g' | awk '{print "\""$1"\":{\"tps\":"$2",\"read/s\":"$3",\"wrtn/s\":"$4",\"read\":"$5",\"wrtn\":"$6"},"}' | tr -d '\n' | sed 's/,$//')
-DISK_STATS=$(df -P | grep -v "^tmpfs" | grep -v "^shm" | grep -v "^run" | grep -v "^dev" | sed 1d | awk '{print "\""$6"\":{\"fs\":\""$1"\",\"used\":"$3",\"free\":"$4",\"total\":"$3+$4"},"}' | tr -d '\n' | sed 's/,$//')
-NETWORK_STATS=$(ifstat -j | sed 's/^{//' | sed 's/}$//')
-LOAD_AVG=$(uptime | grep -o "load average: .*$" | cut -d\: -f2 | sed 's/, / /g' | sed 's/,/./g' | awk '{print $1", "$2", "$3}')
-
-TOP_OUT=$(echo "1" | top -n1 2> /dev/null | grep "^CPU" | sed 's/CPU//g' | sed 's/\%//g' | awk '{print "\""$1"\":{\"%usr\":"$2",\"%sys\":"$4",\"%nice\":"$6",\"%idle\":"$8",\"%iowait\":"$10",\"%irq\":"$12",\"%soft\":"$14"},"}' | tr -d '\n')
-
-if [ "$TOP_OUT" != "" ]; then
-  CPU_ALL=$(top -n1  | grep "^CPU" | sed 's/CPU//g' | sed 's/\%//g' | awk '{print "\"all\":{\"%usr\":"$2",\"%sys\":"$4",\"%nice\":"$6",\"%idle\":"$8",\"%iowait\":"$10",\"%irq\":"$12",\"%soft\":"$14"}"}'  | tr -d '\n' | sed 's/,$//')
-  CPU_STATS=${TOP_OUT}${CPU_ALL}
-else
-  CPU_STATS=$(mpstat -P ALL | grep "^[0-9]" | grep -v "CPU" | sed 's/,/./g' | awk '{print "\""$2"\":{\"%usr\":"$3",\"%nice\":"$4",\"%sys\":"$5",\"%iowait\":"$6",\"%irq\":"$7",\"%soft\":"$8",\"%steal\":"$9",\"%guest\":"$10",\"%idle\":"$11"},"}' | tr -d '\n' | sed 's/,$//')
+PRINT_CPU=0
+PRINT_MEMORY=0
+PRINT_IO=0
+PRINT_DISK=0
+PRINT_NETWORK=0
+PRINT_LOAD=0
+
+while getopts 'acmidnl' OPTION; do
+  case $OPTION in
+    a)
+      PRINT_CPU=1
+      PRINT_MEMORY=1
+      PRINT_IO=1
+      PRINT_DISK=1
+      PRINT_NETWORK=1
+      PRINT_LOAD=1
+    ;;
+    c)
+    PRINT_CPU=1
+    ;;
+    m)
+    PRINT_MEMORY=1
+    ;;
+    i)
+    PRINT_IO=1
+    ;;
+    d)
+    PRINT_DISK=1
+    ;;
+    n)
+    PRINT_NETWORK=1
+    ;;
+    l)
+    PRINT_LOAD=1
+    ;;
+  esac
+done
+
+if [ $PRINT_MEMORY -eq 1 ]; then
+  MEMORY_STATS=$(cat /proc/meminfo | sed 's/://g' | awk '{ print "\""$1"\":{\"value\":"$2",\"unit\":\""$3"\"},"}' | tr -d '\n' | sed 's/,$//')
+fi
+
+if [ $PRINT_IO -eq 1 ]; then
+  IO_STATS=$(iostat -d -k | grep "[0-9]$" | sed 's/,/./g' | awk '{print "\""$1"\":{\"tps\":"$2",\"read/s\":"$3",\"wrtn/s\":"$4",\"read\":"$5",\"wrtn\":"$6"},"}' | tr -d '\n' | sed 's/,$//')
+fi
+
+if [ $PRINT_DISK -eq 1 ]; then
+  DISK_STATS=$(df -P | grep -v "^tmpfs" | grep -v "^shm" | grep -v "^run" | grep -v "^dev" | sed 1d | awk '{print "\""$6"\":{\"fs\":\""$1"\",\"used\":"$3",\"free\":"$4",\"total\":"$3+$4"},"}' | tr -d '\n' | sed 's/,$//')
+fi
+
+if [ $PRINT_NETWORK -eq 1 ]; then
+  NETWORK_STATS=$(ifstat -j | sed 's/^{//' | sed 's/}$//')
+fi
+
+if [ $PRINT_LOAD -eq 1 ]; then
+  LOAD_AVG=$(uptime | grep -o "load average: .*$" | cut -d\: -f2 | sed 's/, / /g' | sed 's/,/./g' | awk '{print $1", "$2", "$3}')
+fi
+
+if [ $PRINT_CPU -eq 1 ]; then
+  TOP_OUT=$(echo "1" | top -n1 2> /dev/null | grep "^CPU" | sed 's/CPU//g' | sed 's/\%//g' | awk '{print "\""$1"\":{\"%usr\":"$2",\"%sys\":"$4",\"%nice\":"$6",\"%idle\":"$8",\"%iowait\":"$10",\"%irq\":"$12",\"%soft\":"$14"},"}' | tr -d '\n')
+
+  if [ "$TOP_OUT" != "" ]; then
+    CPU_ALL=$(top -n1  | grep "^CPU" | sed 's/CPU//g' | sed 's/\%//g' | awk '{print "\"all\":{\"%usr\":"$2",\"%sys\":"$4",\"%nice\":"$6",\"%idle\":"$8",\"%iowait\":"$10",\"%irq\":"$12",\"%soft\":"$14"}"}'  | tr -d '\n' | sed 's/,$//')
+    CPU_STATS=${TOP_OUT}${CPU_ALL}
+  else
+    CPU_STATS=$(mpstat -P ALL | grep "^[0-9]" | grep -v "CPU" | sed 's/,/./g' | awk '{print "\""$2"\":{\"%usr\":"$3",\"%nice\":"$4",\"%sys\":"$5",\"%iowait\":"$6",\"%irq\":"$7",\"%soft\":"$8",\"%steal\":"$9",\"%guest\":"$10",\"%idle\":"$11"},"}' | tr -d '\n' | sed 's/,$//')
+  fi
 fi
 
 read -d '' JSON << EOF
@@ -37,4 +91,4 @@ read -d '' JSON << EOF
 }
 EOF
 
-echo ${JSON} | jq -c
+echo ${JSON} | jq 'walk(if type == "object" then with_entries(select(.value | (. != {} and . != []))) else . end)' -c