script to alert when the given drive space is lower than threshold

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Release Time

12/18/2023

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Update Time

05/14/2025

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drives

RUN AS LOCALSYSTEM USER

NOTES:

give the drives in the variable "drive". for example: if you want to check for the space for C: drive and D: drive, give it like this - drive = ["C:", "D:"]
give the threshold space in the variable "threshold". for example: if you want the script to alert when the drive space of C: and D: is below 10GB and 500MB then give it like this in the variable - threshold = ["10GB", "500MB"]
the drive space in the "threshold" variable should be in the same order corresponding to the drives names in the "drive" variable. you can only give GB, MB AND KB AND IT SHOULD BE IN THE UPPER CASE LIKE - threshold = ["100GB", "500MB", "200KB"]

this script has been scanned with virustotal.com and xcitium verdict cloud.

PYTHON SCRIPT FILE SHA1 VALUE - c7bbbe991b6be4271b8dc4774d083223fe76ea86

JSON FILE SHA1 VALUE - 509c92ce2821db32d1b50feebcb60cac9b0eec58

Procedure's Instructions

drive = ['C:','Z:']

threshold = ['5GB','100MB']

import sys
import os
import re
import ctypes

class disable_file_system_redirection:
    _disable = ctypes.windll.kernel32.Wow64DisableWow64FsRedirection
    _revert = ctypes.windll.kernel32.Wow64RevertWow64FsRedirection
    def __enter__(self):
        self.old_value = ctypes.c_long()
        self.success = self._disable(ctypes.byref(self.old_value))
    def __exit__(self, type, value, traceback):
        if self.success:
            self._revert(self.old_value)

def alert(arg):
    sys.stderr.write("%d%d%d" % (arg, arg, arg))

def convert_bytes(size, unit=None):
    if unit == "KB":
        return (round(size / 1024, 3))
    elif unit == "MB":
        return (round(size / (1024 * 1024), 3))
    elif unit == "GB":
        return (round(size / (1024 * 1024 * 1024), 3))

p = 0  # This constant contains result which will be transferred into the alert return value

drives = list(zip(drive,threshold))

with disable_file_system_redirection():
    for dv,s in drives:
        cmd = os.popen('fsutil volume diskfree '+dv).read().strip()
        free_space = re.findall('Total free bytes(.*)',cmd)
        d = "".join((free_space[0].split()[1].split(',')))
        i = float(d)
        if 'KB' in s:
            threshold_size = float(s.replace("KB",""))
            Existing_FS = convert_bytes(i,"KB")
        elif 'MB' in s:
            threshold_size = float(s.replace("MB",""))
            Existing_FS = convert_bytes(i,"MB")
        elif 'GB' in s:
            threshold_size = float(s.replace("GB",""))
            Existing_FS = convert_bytes(i,"GB")

if Existing_FS < threshold_size:
            print("Low storage alert in local disk "+dv)
            p = 1
        else:
            pass

if p:
    alert(1)
else:
    alert(0)

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script to alert when the given drive space is lower than threshold

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