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Mini Shell
Mini Shell
from __future__ import print_function
import argparse
import sys
import json
import os
import pycriu
def inf(opts):
if opts['in']:
return open(opts['in'], 'rb')
else:
return sys.stdin
def outf(opts):
if opts['out']:
return open(opts['out'], 'w+')
else:
return sys.stdout
def dinf(opts, name):
return open(os.path.join(opts['dir'], name))
def decode(opts):
indent = None
try:
img = pycriu.images.load(inf(opts), opts['pretty'], opts['nopl'])
except pycriu.images.MagicException as exc:
print("Unknown magic %#x.\n"\
"Maybe you are feeding me an image with "\
"raw data(i.e. pages.img)?" % exc.magic, file=sys.stderr)
sys.exit(1)
if opts['pretty']:
indent = 4
f = outf(opts)
json.dump(img, f, indent=indent)
if f == sys.stdout:
f.write("\n")
def encode(opts):
img = json.load(inf(opts))
pycriu.images.dump(img, outf(opts))
def info(opts):
infs = pycriu.images.info(inf(opts))
json.dump(infs, sys.stdout, indent=4)
print()
def get_task_id(p, val):
return p[val] if val in p else p['ns_' + val][0]
#
# Explorers
#
class ps_item:
def __init__(self, p, core):
self.pid = get_task_id(p, 'pid')
self.ppid = p['ppid']
self.p = p
self.core = core
self.kids = []
def show_ps(p, opts, depth=0):
print("%7d%7d%7d %s%s" %
(p.pid, get_task_id(p.p, 'pgid'), get_task_id(p.p, 'sid'), ' ' *
(4 * depth), p.core['tc']['comm']))
for kid in p.kids:
show_ps(kid, opts, depth + 1)
def explore_ps(opts):
pss = {}
ps_img = pycriu.images.load(dinf(opts, 'pstree.img'))
for p in ps_img['entries']:
core = pycriu.images.load(
dinf(opts, 'core-%d.img' % get_task_id(p, 'pid')))
ps = ps_item(p, core['entries'][0])
pss[ps.pid] = ps
# Build tree
psr = None
for pid in pss:
p = pss[pid]
if p.ppid == 0:
psr = p
continue
pp = pss[p.ppid]
pp.kids.append(p)
print("%7s%7s%7s %s" % ('PID', 'PGID', 'SID', 'COMM'))
show_ps(psr, opts)
files_img = None
def ftype_find_in_files(opts, ft, fid):
global files_img
if files_img is None:
try:
files_img = pycriu.images.load(dinf(opts, "files.img"))['entries']
except:
files_img = []
if len(files_img) == 0:
return None
for f in files_img:
if f['id'] == fid:
return f
return None
def ftype_find_in_image(opts, ft, fid, img):
f = ftype_find_in_files(opts, ft, fid)
if f:
return f[ft['field']]
if ft['img'] == None:
ft['img'] = pycriu.images.load(dinf(opts, img))['entries']
for f in ft['img']:
if f['id'] == fid:
return f
return None
def ftype_reg(opts, ft, fid):
rf = ftype_find_in_image(opts, ft, fid, 'reg-files.img')
return rf and rf['name'] or 'unknown path'
def ftype_pipe(opts, ft, fid):
p = ftype_find_in_image(opts, ft, fid, 'pipes.img')
return p and 'pipe[%d]' % p['pipe_id'] or 'pipe[?]'
def ftype_unix(opts, ft, fid):
ux = ftype_find_in_image(opts, ft, fid, 'unixsk.img')
if not ux:
return 'unix[?]'
n = ux['name'] and ' %s' % ux['name'] or ''
return 'unix[%d (%d)%s]' % (ux['ino'], ux['peer'], n)
file_types = {
'REG': {
'get': ftype_reg,
'img': None,
'field': 'reg'
},
'PIPE': {
'get': ftype_pipe,
'img': None,
'field': 'pipe'
},
'UNIXSK': {
'get': ftype_unix,
'img': None,
'field': 'usk'
},
}
def ftype_gen(opts, ft, fid):
return '%s.%d' % (ft['typ'], fid)
files_cache = {}
def get_file_str(opts, fd):
key = (fd['type'], fd['id'])
f = files_cache.get(key, None)
if not f:
ft = file_types.get(fd['type'], {'get': ftype_gen, 'typ': fd['type']})
f = ft['get'](opts, ft, fd['id'])
files_cache[key] = f
return f
def explore_fds(opts):
ps_img = pycriu.images.load(dinf(opts, 'pstree.img'))
for p in ps_img['entries']:
pid = get_task_id(p, 'pid')
idi = pycriu.images.load(dinf(opts, 'ids-%s.img' % pid))
fdt = idi['entries'][0]['files_id']
fdi = pycriu.images.load(dinf(opts, 'fdinfo-%d.img' % fdt))
print("%d" % pid)
for fd in fdi['entries']:
print("\t%7d: %s" % (fd['fd'], get_file_str(opts, fd)))
fdi = pycriu.images.load(dinf(opts, 'fs-%d.img' % pid))['entries'][0]
print("\t%7s: %s" %
('cwd', get_file_str(opts, {
'type': 'REG',
'id': fdi['cwd_id']
})))
print("\t%7s: %s" %
('root', get_file_str(opts, {
'type': 'REG',
'id': fdi['root_id']
})))
class vma_id:
def __init__(self):
self.__ids = {}
self.__last = 1
def get(self, iid):
ret = self.__ids.get(iid, None)
if not ret:
ret = self.__last
self.__last += 1
self.__ids[iid] = ret
return ret
def explore_mems(opts):
ps_img = pycriu.images.load(dinf(opts, 'pstree.img'))
vids = vma_id()
for p in ps_img['entries']:
pid = get_task_id(p, 'pid')
mmi = pycriu.images.load(dinf(opts, 'mm-%d.img' % pid))['entries'][0]
print("%d" % pid)
print("\t%-36s %s" % ('exe',
get_file_str(opts, {
'type': 'REG',
'id': mmi['exe_file_id']
})))
for vma in mmi['vmas']:
st = vma['status']
if st & (1 << 10):
fn = ' ' + 'ips[%lx]' % vids.get(vma['shmid'])
elif st & (1 << 8):
fn = ' ' + 'shmem[%lx]' % vids.get(vma['shmid'])
elif st & (1 << 11):
fn = ' ' + 'packet[%lx]' % vids.get(vma['shmid'])
elif st & ((1 << 6) | (1 << 7)):
fn = ' ' + get_file_str(opts, {
'type': 'REG',
'id': vma['shmid']
})
if vma['pgoff']:
fn += ' + %#lx' % vma['pgoff']
if st & (1 << 7):
fn += ' (s)'
elif st & (1 << 1):
fn = ' [stack]'
elif st & (1 << 2):
fn = ' [vsyscall]'
elif st & (1 << 3):
fn = ' [vdso]'
elif vma['flags'] & 0x0100: # growsdown
fn = ' [stack?]'
else:
fn = ''
if not st & (1 << 0):
fn += ' *'
prot = vma['prot'] & 0x1 and 'r' or '-'
prot += vma['prot'] & 0x2 and 'w' or '-'
prot += vma['prot'] & 0x4 and 'x' or '-'
astr = '%08lx-%08lx' % (vma['start'], vma['end'])
print("\t%-36s%s%s" % (astr, prot, fn))
def explore_rss(opts):
ps_img = pycriu.images.load(dinf(opts, 'pstree.img'))
for p in ps_img['entries']:
pid = get_task_id(p, 'pid')
vmas = pycriu.images.load(dinf(opts, 'mm-%d.img' %
pid))['entries'][0]['vmas']
pms = pycriu.images.load(dinf(opts, 'pagemap-%d.img' % pid))['entries']
print("%d" % pid)
vmi = 0
pvmi = -1
for pm in pms[1:]:
pstr = '\t%lx / %-8d' % (pm['vaddr'], pm['nr_pages'])
while vmas[vmi]['end'] <= pm['vaddr']:
vmi += 1
pme = pm['vaddr'] + (pm['nr_pages'] << 12)
vstr = ''
while vmas[vmi]['start'] < pme:
vma = vmas[vmi]
if vmi == pvmi:
vstr += ' ~'
else:
vstr += ' %08lx / %-8d' % (
vma['start'], (vma['end'] - vma['start']) >> 12)
if vma['status'] & ((1 << 6) | (1 << 7)):
vstr += ' ' + get_file_str(opts, {
'type': 'REG',
'id': vma['shmid']
})
pvmi = vmi
vstr += '\n\t%23s' % ''
vmi += 1
vmi -= 1
print('%-24s%s' % (pstr, vstr))
explorers = {
'ps': explore_ps,
'fds': explore_fds,
'mems': explore_mems,
'rss': explore_rss
}
def explore(opts):
explorers[opts['what']](opts)
def main():
desc = 'CRiu Image Tool'
parser = argparse.ArgumentParser(
description=desc, formatter_class=argparse.RawTextHelpFormatter)
subparsers = parser.add_subparsers(
help='Use crit CMD --help for command-specific help')
# Decode
decode_parser = subparsers.add_parser(
'decode', help='convert criu image from binary type to json')
decode_parser.add_argument(
'--pretty',
help=
'Multiline with indents and some numerical fields in field-specific format',
action='store_true')
decode_parser.add_argument(
'-i',
'--in',
help='criu image in binary format to be decoded (stdin by default)')
decode_parser.add_argument(
'-o',
'--out',
help='where to put criu image in json format (stdout by default)')
decode_parser.set_defaults(func=decode, nopl=False)
# Encode
encode_parser = subparsers.add_parser(
'encode', help='convert criu image from json type to binary')
encode_parser.add_argument(
'-i',
'--in',
help='criu image in json format to be encoded (stdin by default)')
encode_parser.add_argument(
'-o',
'--out',
help='where to put criu image in binary format (stdout by default)')
encode_parser.set_defaults(func=encode)
# Info
info_parser = subparsers.add_parser('info', help='show info about image')
info_parser.add_argument("in")
info_parser.set_defaults(func=info)
# Explore
x_parser = subparsers.add_parser('x', help='explore image dir')
x_parser.add_argument('dir')
x_parser.add_argument('what', choices=['ps', 'fds', 'mems', 'rss'])
x_parser.set_defaults(func=explore)
# Show
show_parser = subparsers.add_parser(
'show', help="convert criu image from binary to human-readable json")
show_parser.add_argument("in")
show_parser.add_argument('--nopl',
help='do not show entry payload (if exists)',
action='store_true')
show_parser.set_defaults(func=decode, pretty=True, out=None)
opts = vars(parser.parse_args())
if not opts:
sys.stderr.write(parser.format_usage())
sys.stderr.write("crit: error: too few arguments\n")
sys.exit(1)
opts["func"](opts)
if __name__ == '__main__':
main()
Zerion Mini Shell 1.0