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#
# namcap rules - utility functions
# Copyright (C) 2009 Dan McGee <dan@archlinux.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
import os
import re
def _file_has_magic(fileobj, magic_bytes):
length = len(magic_bytes)
magic = fileobj.read(length)
fileobj.seek(0)
return magic == magic_bytes
def is_elf(fileobj):
"Take file object, peek at the magic bytes to check if ELF file."
return _file_has_magic(fileobj, b"\x7fELF")
def is_static(fileobj):
"Take file object, peek at the magic bytes to check if static lib."
return _file_has_magic(fileobj, b"!<arch>\n")
def is_script(fileobj):
"Take file object, peek at the magic bytes to check if script."
return _file_has_magic(fileobj, b"#!")
def is_java(fileobj):
"Take file object, peek at the magic bytes to check if class file."
return _file_has_magic(fileobj, b"\xCA\xFE\xBA\xBE")
def script_type(fileobj):
firstline = fileobj.readline()
fileobj.seek(0)
try:
firstline = firstline.decode('utf-8', 'strict')
except UnicodeDecodeError:
return None
if not firstline:
return None
script = re.compile('#!.*/(.*)')
m = script.match(firstline)
if m is None:
return None
cmd = m.group(1).split()
name = cmd[0]
if name == 'env':
name = cmd[1]
return name
clean_filename = lambda s: re.search(r"/tmp/namcap\.[0-9]*/(.*)", s).group(1)
# vim: set ts=4 sw=4 noet:
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