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memory.py
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memory.py
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#!/usr/bin/env python3
#
# Copyright (C) 2021-2022 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# 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 sys
import vyos.opmode
def _get_raw_data():
from re import search as re_search
def find_value(keyword, mem_data):
regex = keyword + ':\s+(\d+)'
res = re_search(regex, mem_data).group(1)
return int(res)
with open("/proc/meminfo", "r") as f:
mem_data = f.read()
total = find_value('MemTotal', mem_data)
available = find_value('MemAvailable', mem_data)
buffers = find_value('Buffers', mem_data)
cached = find_value('Cached', mem_data)
used = total - available
mem_data = {
"total": total,
"free": available,
"used": used,
"buffers": buffers,
"cached": cached
}
for key in mem_data:
# The Linux kernel exposes memory values in kilobytes,
# so we need to normalize them
mem_data[key] = mem_data[key] * 1024
return mem_data
def _get_formatted_output(mem):
from vyos.utils.convert import bytes_to_human
# For human-readable outputs, we convert bytes to more convenient units
# (100M, 1.3G...)
for key in mem:
mem[key] = bytes_to_human(mem[key])
out = "Total: {}\n".format(mem["total"])
out += "Free: {}\n".format(mem["free"])
out += "Used: {}".format(mem["used"])
return out
def show(raw: bool):
ram_data = _get_raw_data()
if raw:
return ram_data
else:
return _get_formatted_output(ram_data)
if __name__ == '__main__':
try:
res = vyos.opmode.run(sys.modules[__name__])
if res:
print(res)
except (ValueError, vyos.opmode.Error) as e:
print(e)
sys.exit(1)

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memory.py (2 KB)

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