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#!/usr/bin/env python3
"""-------------------------------------------------------------------loader.py
Summary: This is a minimal dialog based image loader for tizen images.
Author: Donald Delmar Davis ddavis3@jaguarlandrover.com
Assumptions:
Images are being moved to and from /dev/sda1
Images are stored on depot in /home/public/images
Images are 4M raw files.
----------------------------------------------------------------------------"""
from dialog import Dialog
from threading import Thread
import subprocess
import sys, os
import contextlib
import time
def read_stderr_realtime(proc, stream='stderr'):
"""
do not let python buffer our status stream.
See: http://blog.thelinuxkid.com/2013/06/get-python-subprocess-output-without.html
"""
newlines = ['\n', '\r\n', '\r']
stream = getattr(proc, stream)
with contextlib.closing(stream):
while True:
out = []
last = stream.read(1)
# Don't loop forever
if last == '' and proc.poll() is not None:
break
while last not in newlines:
# Don't loop forever
if last == '' and proc.poll() is not None:
break
out.append(last)
last = stream.read(1)
out = ''.join(out)
yield out
def check_environment(d):
"""
do some rudimentry environment checks.
"""
d.set_background_title("Checking your environment")
try:
subprocess.check_call(["ping", "8.8.8.8", "-c1", "-W5"])
except subprocess.CalledProcessError:
d.set_background_title("Fatal: Not Connected To Network")
d.msgbox("Please check your network connection and restart")
sys.exit(1)
try:
subprocess.check_call(["ping", "192.168.4.200", "-c1", "-W5"])
except subprocess.CalledProcessError:
d.set_background_title("Fatal: Can not find depot")
d.msgbox("Please check your network connection and restart")
sys.exit(1)
subprocess.call(["umount","/mnt/images"])
try:
subprocess.check_call(["mount","depot:/home/public/images","/mnt/images"])
except subprocess.CalledProcessError:
d.set_background_title("Fatal: Can not mount images directory")
d.msgbox("Please contact your system administrator")
sys.exit(1)
def main_menu(d):
"""
fron end menu
"""
d.set_background_title("OSTC Image Loader")
code, tag = d.menu("Select Action Below",
choices=[("load","Load new disk image from depot"),
("archive","Archive disk image to depot"),
("exit","Quit")]
)
return tag
def select_file_for_read(d,directory):
"""
do a little checking before accepting selection
"""
while True:
code, selection = d.fselect(directory,10,70)
if code==d.OK:
if os.path.isfile(selection) and os.access(selection,os.R_OK):
return code, selection
else:
d.msgbox("Invalid Selection: Can't open image file")
else:
return code, selection
def load_image(d):
"""
load a raw image onto the disk. Reboot if successful
"""
d.set_background_title("Select file to load.....")
code, selection = select_file_for_read(d,'/mnt/images/')
if code == d.OK :
disk_loaded=False
cmd = ['pv', '-n', selection ]
try:
output=open('/dev/sda','w')
except:
d.set_background_title("Fatal: Can not open target disk")
d.msgbox("Please check your system")
sys.exit(1)
try:
proc = subprocess.Popen(
cmd,
stdout=output,
stderr=subprocess.PIPE,
universal_newlines=True,
)
d.set_background_title("loading:" +selection)
d.gauge_start("Progress",10,70,0)
for line in read_stderr_realtime(proc):
if line.strip() == '':
continue
if "No such file" in line.strip():
break
d.gauge_update(int(line.strip()))
if int(line.strip()) == 100:
d.gauge_update(100, "Finished!")
disk_loaded=True
break
except IOError:
d.set_background_title("Fatal: Could Not Complete Task")
d.msgbox("Sorry")
sys.exit(1)
code = d.gauge_stop()
if disk_loaded:
d.set_background_title("Success: Disk has been reimaged!")
code = d.pause("Please remove boot media, rebooting in 5 seconds", 10,70, 5)
if code==d.OK:
subprocess.check_call(["reboot"])
else:
d.set_background_title("Reboot Cancelled")
d.msgbox("Have A Nice Day")
sys.exit(2)
else:
d.set_background_title("Cancelled")
d.msgbox("Have A Nice Day")
sys.exit(2)
def select_file_for_write(d,directory):
"""
Do some checks before we write our file.
TODO: add warning if overwriting a file
"""
while True:
code, selection = d.fselect(directory,10,70)
if code==d.OK:
if ( not os.path.isdir(selection) ) and os.access(os.path.dirname(selection),os.W_OK):
return code, selection
else:
d.msgbox("Invalid Selection: Can't write image file: "+selection)
else:
return code, selection
def archive_image(d):
"""
save image of disk to archive directory.
"""
d.set_background_title("Select archive filename.....")
code, selection = select_file_for_write(d,'/mnt/images/archive/')
if code == d.OK :
sourcepath='/dev/sda'
disk_archived=False
cmd = [ 'dd if='+sourcepath+' bs=16M count=256 status=none | pv -n -s 4g' ]
try:
output=open(selection,'w')
except:
d.set_background_title("Fatal: Can not open archive file")
d.msgbox("Please check your system")
sys.exit(1)
try:
d.set_background_title("Archiving to:" +selection)
d.gauge_start("Progress",10,70,0)
proc = subprocess.Popen(
cmd,
stdout=output,
stderr=subprocess.PIPE,
universal_newlines=True,
shell=True
)
for line in read_stderr_realtime(proc):
if line.strip() == '':
continue
if "No such file" in line.strip():
break
d.gauge_update(int(line.strip()))
if int(line.strip()) == 100:
d.gauge_update(100, "Finished!")
disk_archived=True
break
#except:
# pass
except IOError:
d.set_background_title("Fatal: Could Not Complete Task")
d.msgbox("Sorry")
sys.exit(1)
code = d.gauge_stop()
if disk_archived:
d.set_background_title("Success: Disk has been archived!")
#code = d.pause("Returning to loader in 5 seconds", 10,70, 5)
#if code==d.OK:
# subprocess.check_call(["reboot"])
#else:
# d.set_background_title("Reboot Cancelled")
# d.msgbox("Have A Nice Day")
# sys.exit(2)
else:
d.set_background_title("Cancelled")
d.msgbox("Have A Nice Day")
sys.exit(2)
"""------------------------------------------------------------------------main
TODO: should go from archive to load
----------------------------------------------------------------------------"""
d = Dialog(dialog="dialog")
check_environment(d)
while True:
choice=main_menu(d)
if choice=="load":
load_image(d)
if choice=="archive":
archive_image(d)
else:
d.set_background_title("OK....")
d.msgbox("Have A Nice Day")
sys.exit(2)
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