Added basic support for FreeBSD

readme.md

@@ -19,7 +19,7 @@ Features
 - OSX, Linux support
 - [ ] **TODO:** network I/O metric support
 
-Tested on: OS X El Capitan 10.11.5, Ubuntu 14 LTS, CentOS 7
+Tested on: OS X El Capitan 10.11.5, Ubuntu 14 LTS, CentOS 7, FreeBSD 11.1.
 
 
 Installation

scripts/cpu.sh

@@ -45,9 +45,17 @@ get_cpu_usage() {
     fi
   else
     if command_exists "vmstat"; then
-      vmstat -n "$refresh_interval" 2 | tail -n 1 | awk '{print 100-$(NF-2)}'
+	if is_freebsd; then
+	    vmstat -n "$refresh_interval" -c 2 | tail -n 1 | awk '{print 100-$(NF-0)}'
+	else
+	    vmstat -n "$refresh_interval" 2 | tail -n 1 | awk '{print 100-$(NF-2)}'
+	fi
     else
-      top -b -n 2 -d "$refresh_interval" | sed -nr '/%Cpu/s/.*,[[:space:]]*([0-9]+[.,][0-9]*)[[:space:]]*id.*/\1/p' | tail -n 1 | awk '{ print 100-$0 }'
+	if is_freebsd; then
+	    top -d2 | sed -nr '/CPU:/s/.*,[[:space:]]*([0-9]+[.,][0-9]*)%[[:space:]]*id.*/\1/p' | tail -n 1 | awk '{ print 100-$0 }'
+	else
+	    top -b -n 2 -d "$refresh_interval" | sed -nr '/%Cpu/s/.*,[[:space:]]*([0-9]+[.,][0-9]*)[[:space:]]*id.*/\1/p' | tail -n 1 | awk '{ print 100-$0 }'
+	fi
     fi
   fi
 }
@@ -70,4 +78,4 @@ main(){
   print_cpu_usage
 }
 
-main
+main

scripts/helpers.sh

@@ -24,6 +24,9 @@ is_linux(){
   [ $(uname -s) == "Linux" ]
 }
 
+is_freebsd() {
+    [ $(uname) == FreeBSD ]
+}
 
 command_exists() {
   local command="$1"

scripts/mem.sh

@@ -40,6 +40,8 @@ print_mem() {
     mem_usage=$(get_mem_usage_osx)
   elif is_linux; then 
     mem_usage=$(get_mem_usage_linux)
+  elif is_freebsd; then
+    mem_usage=$(get_mem_usage_freebsd)
   fi
 
   local size_scale="$(get_size_scale_factor "$size_unit")"
@@ -94,6 +96,10 @@ get_mem_usage_osx(){
   '
 }
 
+# Relies on vmstat, but could also be done with top on FreeBSD
+get_mem_usage_freebsd(){
+  vmstat -H | tail -n 1 | awk '{ print $5, $4 }'
+}
 
 # Method #1. Sum up free+buffers+cached, treat it as "available" memory, assuming buff+cache can be reclaimed. Note, that this assumption is not 100% correct, buff+cache most likely cannot be 100% reclaimed, but this is how memory calculation is used to be done on Linux
 
@@ -122,5 +128,3 @@ main() {
 
 main
 
-
-