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#!/usr/bin/env python2
# This script was developed by Vijaykumar Koppad (vkoppad@redhat.com)
# The latest version of this script can found at
# http://github.com/vijaykumar-koppad/crefi
from __future__ import with_statement
import sys
import os
import re
import random
from optparse import OptionParser
import time
import string
import errno
def os_rd(src, size):
fd = os.open(src,os.O_RDONLY)
data = os.read(fd, size)
os.close(fd)
return data
def os_wr(dest, data):
fd = os.open(dest,os.O_WRONLY|os.O_CREAT|os.O_EXCL, 0644)
os.write(fd, data)
os.close(fd)
return
def create_sparse_file(fil):
if option.size:
option.random = False
size = option.size
else:
size = random.randint(option.min, option.max)
data = os_rd("/dev/zero", size)
os_wr(fil, data)
return
def create_binary_file(fil):
if option.size:
option.random = False
size = option.size
else:
size = random.randint(option.min, option.max)
data = os_rd("/dev/urandom", size)
os_wr(fil, data)
return
def create_txt_file(fil):
if option.size:
option.random = False
size = option.size
else:
size = random.randint(option.min, option.max)
if size < 500*1024:
data = os_rd("/etc/services", size)
os_wr(fil, data)
else:
data = os_rd("/etc/services", 500*1024)
file_size = 0
fd = os.open(fil,os.O_WRONLY|os.O_CREAT|os.O_EXCL, 0644)
while file_size < size:
os.write(fd, data)
file_size += 500*1024
os.close(fd)
return
def get_filename():
size = option.flen
char = string.uppercase+string.digits
st = ''.join(random.choice(char) for i in range(size))
ti = str((hex(int(str(time.time()).split('.')[0])))[2:])
return ti+"~~"+st
def text_files(files, file_count):
for k in range(files):
if not file_count%option.inter:
print file_count
fil = get_filename()
create_txt_file(fil)
file_count += 1
return file_count
def sparse_files(files, file_count):
for k in range(files):
if not file_count%option.inter:
print file_count
fil = get_filename()
create_sparse_file(fil)
file_count += 1
return file_count
def binary_files(files, file_count):
for k in range(files):
if not file_count%option.inter:
print file_count
fil = get_filename()
create_binary_file(fil)
file_count += 1
return file_count
def human2bytes(size):
size_short = {
1024 : ['K','KB','KiB','k','kB','kiB'],
1024*1024 : ['M','MB','MiB'],
1024*1024*1024 : ['G','GB','GiB']
}
num = re.search('(\d+)',size).group()
ext = size[len(num):]
num = int(num)
if ext == '':
return num
for value, keys in size_short.items():
if ext in keys:
size = num*value
return size
def multipledir(mnt_pnt,brdth,depth,files):
files_count = 1
for i in range(brdth):
breadth = mnt_pnt+"/"+str(i)
try:
os.makedirs(breadth)
except OSError as ex:
if not ex.errno is errno.EEXIST:
raise
os.chdir(breadth)
dir_depth = breadth
print breadth
for j in range(depth):
dir_depth = dir_depth+"/"+str(j)
try:
os.makedirs(dir_depth)
except OSError as ex:
if not ex.errno is errno.EEXIST:
raise
os.chdir(dir_depth)
if option.file_type == "text":
files_count = text_files(files, files_count)
elif option.file_type == "sparse":
files_count = sparse_files(files, files_count)
elif option.file_type == "binary":
files_count = binary_files(files, files_count)
else:
print "Not a valid file type"
sys.exit(1)
def singledir(mnt_pnt, files):
files_count = 1
os.chdir(mnt_pnt)
if option.file_type == "text":
files_count = text_files(files, files_count)
elif option.file_type == "sparse":
files_count = sparse_files(files, files_count)
elif option.file_type == "binary":
files_count = binary_files(files, files_count)
else:
print "Not a valid file type"
sys.exit(1)
if __name__ == '__main__':
usage = "usage: %prog [option] <MNT_PT>"
parser = OptionParser(usage=usage)
parser.add_option("-n", dest="files",type="int" ,default=100,
help="number of files in each level [default: %default]")
parser.add_option("--size", action = "store",type="string",
help="size of the files to be used")
parser.add_option("--random", action="store_true", default=True,
help="random size of the file between --min and --max "
"[default: %default]")
parser.add_option("--max", action = "store",type="string", default="500K",
help="maximum size of the files, if random is True "
"[default: %default]")
parser.add_option("--min", action = "store",type="string", default="10K",
help="minimum size of the files, if random is True "
"[default: %default]" )
parser.add_option("--single", action="store_true", dest="dir",default=True,
help="create files in single directory [default: %default]" )
parser.add_option("--multi", action="store_false", dest="dir",
help="create files in multiple directories")
parser.add_option("-b", dest="brdth",type="int",default=5,
help="number of directories in one level(works with --multi)[default: %default]")
parser.add_option("-d", dest="depth",type="int",default=5,
help="number of levels of directories(works with --multi)[default: %default]")
parser.add_option("-l", dest="flen",type="int" ,default=10,
help="number of bytes for filename "
"[default: %default]")
parser.add_option("-t","--type", action="store", type="string" , dest="file_type",default="text",
help="type of the file to be created (text, sparse, binary) [default: %default]" )
parser.add_option("-I", dest="inter", type="int", default=100,
help="print number files created of interval [defailt: %dafault]")
(option,args) = parser.parse_args()
if not args:
print "usage: <script> [option] <MNT_PT>"
print ""
sys.exit(1)
args[0] = os.path.abspath(args[0])
if option.size:
option.size = human2bytes(option.size)
else:
option.max = human2bytes(option.max)
option.min = human2bytes(option.min)
if option.dir:
singledir(args[0], option.files)
else:
multipledir(args[0], option.brdth, option.depth, option.files)
print "creation of files completed.\n"
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