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# Copyright 2021-2024 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
import os
import stat
import portage
def installed_dynlibs(directory):
"""
This traverses installed *.so symlinks to check if they point to
regular files. If a symlink target is outside of the top directory,
traversal follows the corresponding file inside the top directory
if it exists, and otherwise stops following the symlink.
"""
directory_prefix = f"{directory.rstrip(os.sep)}{os.sep}"
for parent, _dirnames, filenames in os.walk(directory):
for filename in filenames:
if filename.endswith(".so"):
filename_abs = os.path.join(parent, filename)
target = filename_abs
levels = 0
while True:
try:
st = os.lstat(target)
except OSError:
break
if stat.S_ISREG(st.st_mode):
return True
elif stat.S_ISLNK(st.st_mode):
levels += 1
if levels == 40:
portage.writemsg(
f"too many levels of symbolic links: {filename_abs}\n",
noiselevel=-1,
)
break
target = portage.abssymlink(target)
if not target.startswith(directory_prefix):
# If target is outside the top directory, then follow the
# corresponding file inside the top directory if it exists,
# and otherwise stop following.
target = os.path.join(
directory_prefix, target.lstrip(os.sep)
)
else:
break
return False
def check_dyn_libs_inconsistent(directory, provides):
"""Checks directory for whether any dynamic libraries were installed and
if PROVIDES corresponds."""
# Let's check if we've got inconsistent results.
# If we're installing dynamic libraries (.so files), we should
# really have a PROVIDES.
# (This is a complementary check at the point of ingestion for the
# creation check in doebuild.py)
# Note: we could check a non-empty PROVIDES against the list of .sos,
# but this doesn't gain us anything. We're interested in failure
# to properly parse the installed files at all, which should really
# be a global problem (e.g. bug #811462)
return not provides and installed_dynlibs(directory)
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