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import sys
import distutils.spawn
import random
import string
import logging
import os
import re
from subprocess import Popen, PIPE
RNP_ROOT = None
WORKDIR = ''
CONSOLE_ENCODING = 'UTF-8'
class CLIError(Exception):
def __init__(self, message, log = None):
super(CLIError, self).__init__(message)
self.message = message
self.log = log
logging.info(self.message)
logging.debug(self.log.strip())
def __str__(self):
return self.message + '\n' + self.log
def set_workdir(dir):
global WORKDIR
WORKDIR = dir
def is_windows():
return sys.platform.startswith('win') or sys.platform.startswith('msys')
def path_for_gpg(path):
# GPG built for mingw/msys doesn't work with Windows paths
if re.match(r'^[a-z]:[\\\/].*', path.lower()):
path = '/' + path[0] + '/' + path[3:].replace('\\', '/')
return path
def raise_err(msg, log = None):
raise CLIError(msg, log)
def size_to_readable(num, suffix = 'B'):
for unit in ['', 'K', 'M', 'G', 'T', 'P', 'E', 'Z']:
if abs(num) < 1024.0:
return "%3.1f%s%s" % (num, unit, suffix)
num /= 1024.0
return "%.1f%s%s" % (num, 'Yi', suffix)
def list_upto(lst, count):
return (list(lst)*(count//len(lst)+1))[:count]
def pswd_pipe(password):
pr, pw = os.pipe()
with os.fdopen(pw, 'w') as fw:
fw.write(password)
fw.write('\n')
fw.write(password)
os.set_inheritable(pr, True)
if not is_windows():
return pr
# On Windows pipe is not inheritable so dup() is needed
prd = os.dup(pr)
os.close(pr)
return prd
def random_text(path, size):
# Generate random text, with 50% probability good-compressible
if random.randint(0, 10) < 5:
st = ''.join(random.choice(string.ascii_letters + string.digits + " \t\r\n-,.")
for _ in range(size))
else:
st = ''.join(random.choice("abcdef0123456789 \t\r\n-,.") for _ in range(size))
with open(path, 'w+') as f:
f.write(st)
def file_text(path, encoding = CONSOLE_ENCODING):
with open(path, 'rb') as f:
return f.read().decode(encoding).replace('\r\r', '\r')
def find_utility(name, exitifnone = True):
path = distutils.spawn.find_executable(name)
if not path and exitifnone:
logging.error('Cannot find utility {}. Exiting.'.format(name))
sys.exit(1)
return path
def rnp_file_path(relpath, check = True):
global RNP_ROOT
if not RNP_ROOT:
pypath = os.path.dirname(__file__)
RNP_ROOT = os.path.realpath(os.path.join(pypath, '../..'))
fpath = os.path.realpath(os.path.join(RNP_ROOT, relpath))
if check and not os.path.isfile(fpath):
raise NameError('rnp: file ' + relpath + ' not found')
return fpath
def run_proc_windows(proc, params, stdin=None):
exe = os.path.basename(proc)
# test special quote cases
params = list(map(lambda st: st.replace('"', '\\"'), params))
# We need to escape empty parameters/ones with spaces with quotes
params = tuple(map(lambda st: st if (st and not any(x in st for x in [' ','\r','\t'])) else '"%s"' % st, [exe] + params))
logging.debug((proc + ' ' + ' '.join(params)).strip())
logging.debug('Working directory: ' + os.getcwd())
sys.stdout.flush()
stdin_path = os.path.join(WORKDIR, 'stdin.txt')
stdout_path = os.path.join(WORKDIR, 'stdout.txt')
stderr_path = os.path.join(WORKDIR, 'stderr.txt')
pass_path = os.path.join(WORKDIR, 'pass.txt')
passfd = 0
passfo = None
try:
idx = params.index('--pass-fd')
if idx < len(params):
passfd = int(params[idx+1])
passfo = os.fdopen(passfd, 'r', closefd=False)
except (ValueError, OSError):
# Ignore if pass-fd is invalid/could not be opened
pass
# We may use pipes here (ensuring we use dup to inherit handles), but those have limited buffer
# so we'll need to poll process
if stdin:
with open(stdin_path, "wb+") as stdinf:
stdinf.write(stdin.encode() if isinstance(stdin, str) else stdin)
stdin_fl = os.open(stdin_path, os.O_RDONLY | os.O_BINARY)
stdin_no = sys.stdin.fileno()
stdin_cp = os.dup(stdin_no)
else:
stdin_fl = None
stdin_no = -1
stdin_cp = None
stdout_fl = os.open(stdout_path, os.O_CREAT | os.O_RDWR | os.O_BINARY)
stdout_no = sys.stdout.fileno()
stdout_cp = os.dup(stdout_no)
stderr_fl = os.open(stderr_path, os.O_CREAT | os.O_RDWR | os.O_BINARY)
stderr_no = sys.stderr.fileno()
stderr_cp = os.dup(stderr_no)
if passfo:
with open(pass_path, "w+") as passf:
passf.write(passfo.read())
pass_fl = os.open(pass_path, os.O_RDONLY | os.O_BINARY)
pass_cp = os.dup(passfd)
retcode = -1
try:
os.dup2(stdout_fl, stdout_no)
os.close(stdout_fl)
os.dup2(stderr_fl, stderr_no)
os.close(stderr_fl)
if stdin:
os.dup2(stdin_fl, stdin_no)
os.close(stdin_fl)
if passfo:
os.dup2(pass_fl, passfd)
os.close(pass_fl)
retcode = os.spawnv(os.P_WAIT, proc, params)
finally:
os.dup2(stdout_cp, stdout_no)
os.close(stdout_cp)
os.dup2(stderr_cp, stderr_no)
os.close(stderr_cp)
if stdin:
os.dup2(stdin_cp, stdin_no)
os.close(stdin_cp)
if passfo:
os.dup2(pass_cp, passfd)
os.close(pass_cp)
passfo.close()
out = file_text(stdout_path).replace('\r\n', '\n')
err = file_text(stderr_path).replace('\r\n', '\n')
os.unlink(stdout_path)
os.unlink(stderr_path)
if stdin:
os.unlink(stdin_path)
if passfo:
os.unlink(pass_path)
logging.debug(err.strip())
logging.debug(out.strip())
return (retcode, out, err)
if sys.version_info >= (3,):
def decode_string_escape(s):
bts = bytes(s, 'utf-8')
result = u''
candidate = bytearray()
utf = bytearray()
for b in bts:
if b > 0x7F:
if len(candidate) > 0:
result += candidate.decode('unicode-escape')
candidate.clear()
utf.append(b)
else:
if len(utf) > 0:
result += utf.decode('utf-8')
utf.clear()
candidate.append(b)
if len(candidate) > 0:
result += candidate.decode('unicode-escape')
if len(utf) > 0:
result += utf.decode('utf-8')
return result
def _decode(s):
return s
else: # Python 2
def decode_string_escape(s):
return s.encode(CONSOLE_ENCODING).decode('decode_string_escape')
def _decode(x):
return x.decode(CONSOLE_ENCODING)
def run_proc(proc, params, stdin=None):
# On Windows we need to use spawnv() for handle inheritance in pswd_pipe()
if is_windows():
return run_proc_windows(proc, params, stdin)
paramline = u' '.join(map(_decode, params))
logging.debug((proc + ' ' + paramline).strip())
param_bytes = list(map(lambda x: x.encode(CONSOLE_ENCODING), params))
process = Popen([proc] + param_bytes, stdout=PIPE, stderr=PIPE,
stdin=PIPE if stdin else None, close_fds=False,
universal_newlines=True)
output, errout = process.communicate(stdin)
retcode = process.poll()
logging.debug(errout.strip())
logging.debug(output.strip())
return (retcode, output, errout)
def run_proc_fast(proc, params):
with open(os.devnull, 'w') as devnull:
proc = Popen([proc] + params, stdout=devnull, stderr=devnull)
return proc.wait()
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