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+# -*- coding: utf-8 -*-
+
+# sysdata
+
+# Sysdata is a module uses great Py3status (i3status wrapper) to
+# display system information (RAM usage) in i3bar (Linux systems).
+# For more information read:
+# i3wm homepage: http://i3wm.org
+# py3status homepage: https://github.com/ultrabug/py3status
+
+# Copyright (C) <2013> <Shahin Azad [ishahinism at Gmail]>
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+import subprocess
+from time import time
+
+
+class GetData:
+ """Get system status
+
+ """
+ def execCMD(self, cmd, arg):
+ """Take a system command and its argument, then return the result.
+
+ Arguments:
+ - `cmd`: system command.
+ - `arg`: argument.
+ """
+ result = subprocess.check_output([cmd, arg])
+ return result
+
+ def cpu(self):
+ """Get the cpu usage data from /proc/stat :
+ cpu 2255 34 2290 22625563 6290 127 456 0 0
+ - user: normal processes executing in user mode
+ - nice: niced processes executing in user mode
+ - system: processes executing in kernel mode
+ - idle: twiddling thumbs
+ - iowait: waiting for I/O to complete
+ - irq: servicing interrupts
+ - softirq: servicing softirqs
+ - steal: involuntary wait
+ - guest: running a normal guest
+ - guest_nice: running a niced guest
+ These numbers identify the amount of time the CPU has spent performing
+ different kinds of work. Time units are in USER_HZ (typically hundredths of a
+ second)
+ """
+ with open('/proc/stat', 'r') as fd:
+ line = fd.readline()
+ cpu_data = line.split()
+ total_cpu_time = sum(map(int, cpu_data[1:]))
+ cpu_idle_time = int(cpu_data[4])
+
+ #return the cpu total&idle time
+ return total_cpu_time, cpu_idle_time
+
+ def memory(self):
+ """Execute 'free -m' command, grab the memory capacity and used size
+ then return; Memory size 'total_mem', Used_mem, and percentage
+ of used memory.
+
+ """
+ # Run 'free -m' command and make a list from output.
+ mem_data = self.execCMD('free', '-m').split()
+ total_mem = int(mem_data[7]) / 1024.
+ used_mem = int(mem_data[15]) / 1024.
+ # Caculate percentage
+ used_mem_percent = int(used_mem / (total_mem / 100))
+
+ # Results are in kilobyte.
+ return total_mem, used_mem, used_mem_percent
+
+
+class Py3status:
+ """
+ System status in i3bar
+ """
+ def __init__(self):
+ self.data = GetData()
+ self.cpu_total = 0
+ self.cpu_idle = 0
+
+ def cpuInfo(self, json, i3status_config):
+ """calculate the CPU status and return it.
+
+ """
+ response = {'full_text': '', 'name': 'cpu_usage'}
+ cpu_total, cpu_idle = self.data.cpu()
+ used_cpu_percent = 1 - float(cpu_idle-self.cpu_idle)/float(cpu_total-self.cpu_total)
+ self.cpu_total = cpu_total
+ self.cpu_idle = cpu_idle
+
+ if used_cpu_percent <= 40:
+ response['color'] = i3status_config['color_good']
+ elif used_cpu_percent <= 75:
+ response['color'] = i3status_config['color_degraded']
+ else:
+ response['color'] = i3status_config['color_bad']
+
+ response['full_text'] = "CPU: %.2f%%" % (used_cpu_percent*100)
+ #cache the status for 10 seconds
+ response['cached_until'] = time() + 10
+
+ return (0, response)
+
+ def ramInfo(self, json, i3status_config):
+ """calculate the memory (RAM) status and return it.
+
+ """
+ response = {'full_text': '', 'name': 'ram_info'}
+ total_mem, used_mem, used_mem_percent = self.data.memory()
+
+ if used_mem_percent <= 40:
+ response['color'] = i3status_config['color_good']
+ elif used_mem_percent <= 75:
+ response['color'] = i3status_config['color_degraded']
+ else:
+ response['color'] = i3status_config['color_bad']
+
+ response['full_text'] = "RAM: %.2f/%.2f GB (%d%%)" % \
+ (used_mem, total_mem, used_mem_percent)
+ response['cached_until'] = time()
+
+ return (0, response)