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#
# namcap rules - unusedsodepends
# Copyright (C) 2009 Abhishek Dasgupta <abhidg@gmail.com>
# Copyright (C) 2013 Jan Alexander Steffens <jan.steffens@gmail.com>
#
# 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, subprocess, re
import tempfile
from Namcap.util import is_elf, clean_filename
from Namcap.ruleclass import *
libre = re.compile('^\t(/.*)')
lddfail = re.compile('^\tnot a dynamic executable')
def get_unused_sodepends(filename):
p = subprocess.Popen(["ldd", "-r", "-u", filename],
env={'LANG': 'C'},
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
var = p.communicate()
if p.returncode == 0:
return
for j in var[0].decode('ascii').splitlines():
# Don't raise an error, as the executable might be a valid ELF file,
# just not a dynamically linked one
n = lddfail.search(j)
if n is not None:
return
n = libre.search(j)
if n is not None:
yield n.group(1)
class package(TarballRule):
name = "unusedsodepends"
description = "Checks for unused dependencies caused by linked shared libraries"
def analyze(self, pkginfo, tar):
for entry in tar:
if not entry.isfile():
continue
# is it an ELF file ?
f = tar.extractfile(entry)
elf = f.read()
f.close()
if elf[:4] != b"\x7fELF":
continue # not an ELF file
# write it to a temporary file
f = tempfile.NamedTemporaryFile(delete = False)
f.write(elf)
f.close()
os.chmod(f.name, 0o755)
for lib in get_unused_sodepends(f.name):
self.warnings.append(("unused-sodepend %s %s", (lib, entry.name)))
os.unlink(f.name)
# vim: set ts=4 sw=4 noet:
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