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# Copyright 2010-2014 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
__all__ = ['env_update']
import errno
import glob
import io
import stat
import sys
import time
import portage
from portage import os, _encodings, _unicode_decode, _unicode_encode
from portage.checksum import prelink_capable
from portage.data import ostype
from portage.exception import ParseError
from portage.localization import _
from portage.process import find_binary
from portage.util import atomic_ofstream, ensure_dirs, getconfig, \
normalize_path, writemsg
from portage.util.listdir import listdir
from portage.dbapi.vartree import vartree
from portage.package.ebuild.config import config
if sys.hexversion >= 0x3000000:
# pylint: disable=W0622
long = int
def env_update(makelinks=1, target_root=None, prev_mtimes=None, contents=None,
env=None, writemsg_level=None, vardbapi=None):
"""
Parse /etc/env.d and use it to generate /etc/profile.env, csh.env,
ld.so.conf, and prelink.conf. Finally, run ldconfig. When ldconfig is
called, its -X option will be used in order to avoid potential
interference with installed soname symlinks that are required for
correct operation of FEATURES=preserve-libs for downgrade operations.
It's not necessary for ldconfig to create soname symlinks, since
portage will use NEEDED.ELF.2 data to automatically create them
after src_install if they happen to be missing.
@param makelinks: True if ldconfig should be called, False otherwise
@param target_root: root that is passed to the ldconfig -r option,
defaults to portage.settings["ROOT"].
@type target_root: String (Path)
"""
if vardbapi is None:
if isinstance(env, config):
vardbapi = vartree(settings=env).dbapi
else:
if target_root is None:
eprefix = portage.settings["EPREFIX"]
target_root = portage.settings["ROOT"]
target_eroot = portage.settings['EROOT']
else:
eprefix = portage.const.EPREFIX
target_eroot = os.path.join(target_root,
eprefix.lstrip(os.sep))
target_eroot = target_eroot.rstrip(os.sep) + os.sep
if hasattr(portage, "db") and target_eroot in portage.db:
vardbapi = portage.db[target_eroot]["vartree"].dbapi
else:
settings = config(config_root=target_root,
target_root=target_root, eprefix=eprefix)
target_root = settings["ROOT"]
if env is None:
env = settings
vardbapi = vartree(settings=settings).dbapi
# Lock the config memory file to prevent symlink creation
# in merge_contents from overlapping with env-update.
vardbapi._fs_lock()
try:
return _env_update(makelinks, target_root, prev_mtimes, contents,
env, writemsg_level)
finally:
vardbapi._fs_unlock()
def _env_update(makelinks, target_root, prev_mtimes, contents, env,
writemsg_level):
if writemsg_level is None:
writemsg_level = portage.util.writemsg_level
if target_root is None:
target_root = portage.settings["ROOT"]
if prev_mtimes is None:
prev_mtimes = portage.mtimedb["ldpath"]
if env is None:
settings = portage.settings
else:
settings = env
eprefix = settings.get("EPREFIX", "")
eprefix_lstrip = eprefix.lstrip(os.sep)
eroot = normalize_path(os.path.join(target_root, eprefix_lstrip)).rstrip(os.sep) + os.sep
envd_dir = os.path.join(eroot, "etc", "env.d")
ensure_dirs(envd_dir, mode=0o755)
fns = listdir(envd_dir, EmptyOnError=1)
fns.sort()
templist = []
for x in fns:
if len(x) < 3:
continue
if not x[0].isdigit() or not x[1].isdigit():
continue
if x.startswith(".") or x.endswith("~") or x.endswith(".bak"):
continue
templist.append(x)
fns = templist
del templist
space_separated = set(["CONFIG_PROTECT", "CONFIG_PROTECT_MASK"])
colon_separated = set(["ADA_INCLUDE_PATH", "ADA_OBJECTS_PATH",
"CLASSPATH", "INFODIR", "INFOPATH", "KDEDIRS", "LDPATH", "MANPATH",
"PATH", "PKG_CONFIG_PATH", "PRELINK_PATH", "PRELINK_PATH_MASK",
"PYTHONPATH", "ROOTPATH"])
config_list = []
for x in fns:
file_path = os.path.join(envd_dir, x)
try:
myconfig = getconfig(file_path, expand=False)
except ParseError as e:
writemsg("!!! '%s'\n" % str(e), noiselevel=-1)
del e
continue
if myconfig is None:
# broken symlink or file removed by a concurrent process
writemsg("!!! File Not Found: '%s'\n" % file_path, noiselevel=-1)
continue
config_list.append(myconfig)
if "SPACE_SEPARATED" in myconfig:
space_separated.update(myconfig["SPACE_SEPARATED"].split())
del myconfig["SPACE_SEPARATED"]
if "COLON_SEPARATED" in myconfig:
colon_separated.update(myconfig["COLON_SEPARATED"].split())
del myconfig["COLON_SEPARATED"]
env = {}
specials = {}
for var in space_separated:
mylist = []
for myconfig in config_list:
if var in myconfig:
for item in myconfig[var].split():
if item and not item in mylist:
mylist.append(item)
del myconfig[var] # prepare for env.update(myconfig)
if mylist:
env[var] = " ".join(mylist)
specials[var] = mylist
for var in colon_separated:
mylist = []
for myconfig in config_list:
if var in myconfig:
for item in myconfig[var].split(":"):
if item and not item in mylist:
mylist.append(item)
del myconfig[var] # prepare for env.update(myconfig)
if mylist:
env[var] = ":".join(mylist)
specials[var] = mylist
for myconfig in config_list:
"""Cumulative variables have already been deleted from myconfig so that
they won't be overwritten by this dict.update call."""
env.update(myconfig)
ldsoconf_path = os.path.join(eroot, "etc", "ld.so.conf")
try:
myld = io.open(_unicode_encode(ldsoconf_path,
encoding=_encodings['fs'], errors='strict'),
mode='r', encoding=_encodings['content'], errors='replace')
myldlines = myld.readlines()
myld.close()
oldld = []
for x in myldlines:
#each line has at least one char (a newline)
if x[:1] == "#":
continue
oldld.append(x[:-1])
except (IOError, OSError) as e:
if e.errno != errno.ENOENT:
raise
oldld = None
newld = specials["LDPATH"]
if (oldld != newld):
#ld.so.conf needs updating and ldconfig needs to be run
myfd = atomic_ofstream(ldsoconf_path)
myfd.write("# ld.so.conf autogenerated by env-update; make all changes to\n")
myfd.write("# contents of /etc/env.d directory\n")
for x in specials["LDPATH"]:
myfd.write(x + "\n")
myfd.close()
potential_lib_dirs = set()
for lib_dir_glob in ('usr/lib*', 'lib*'):
x = os.path.join(eroot, lib_dir_glob)
for y in glob.glob(_unicode_encode(x,
encoding=_encodings['fs'], errors='strict')):
try:
y = _unicode_decode(y,
encoding=_encodings['fs'], errors='strict')
except UnicodeDecodeError:
continue
if os.path.basename(y) != 'libexec':
potential_lib_dirs.add(y[len(eroot):])
# Update prelink.conf if we are prelink-enabled
if prelink_capable:
prelink_d = os.path.join(eroot, 'etc', 'prelink.conf.d')
ensure_dirs(prelink_d)
newprelink = atomic_ofstream(os.path.join(prelink_d, 'portage.conf'))
newprelink.write("# prelink.conf autogenerated by env-update; make all changes to\n")
newprelink.write("# contents of /etc/env.d directory\n")
for x in sorted(potential_lib_dirs) + ['bin', 'sbin']:
newprelink.write('-l /%s\n' % (x,));
prelink_paths = set()
prelink_paths |= set(specials.get('LDPATH', []))
prelink_paths |= set(specials.get('PATH', []))
prelink_paths |= set(specials.get('PRELINK_PATH', []))
prelink_path_mask = specials.get('PRELINK_PATH_MASK', [])
for x in prelink_paths:
if not x:
continue
if x[-1:] != '/':
x += "/"
plmasked = 0
for y in prelink_path_mask:
if not y:
continue
if y[-1] != '/':
y += "/"
if y == x[0:len(y)]:
plmasked = 1
break
if not plmasked:
newprelink.write("-h %s\n" % (x,))
for x in prelink_path_mask:
newprelink.write("-b %s\n" % (x,))
newprelink.close()
# Migration code path. If /etc/prelink.conf was generated by us, then
# point it to the new stuff until the prelink package re-installs.
prelink_conf = os.path.join(eroot, 'etc', 'prelink.conf')
try:
with open(_unicode_encode(prelink_conf,
encoding=_encodings['fs'], errors='strict'), 'rb') as f:
if f.readline() == b'# prelink.conf autogenerated by env-update; make all changes to\n':
f = atomic_ofstream(prelink_conf)
f.write('-c /etc/prelink.conf.d/*.conf\n')
f.close()
except IOError as e:
if e.errno != errno.ENOENT:
raise
current_time = long(time.time())
mtime_changed = False
lib_dirs = set()
for lib_dir in set(specials['LDPATH']) | potential_lib_dirs:
x = os.path.join(eroot, lib_dir.lstrip(os.sep))
try:
newldpathtime = os.stat(x)[stat.ST_MTIME]
lib_dirs.add(normalize_path(x))
except OSError as oe:
if oe.errno == errno.ENOENT:
try:
del prev_mtimes[x]
except KeyError:
pass
# ignore this path because it doesn't exist
continue
raise
if newldpathtime == current_time:
# Reset mtime to avoid the potential ambiguity of times that
# differ by less than 1 second.
newldpathtime -= 1
os.utime(x, (newldpathtime, newldpathtime))
prev_mtimes[x] = newldpathtime
mtime_changed = True
elif x in prev_mtimes:
if prev_mtimes[x] == newldpathtime:
pass
else:
prev_mtimes[x] = newldpathtime
mtime_changed = True
else:
prev_mtimes[x] = newldpathtime
mtime_changed = True
if makelinks and \
not mtime_changed and \
contents is not None:
libdir_contents_changed = False
for mypath, mydata in contents.items():
if mydata[0] not in ("obj", "sym"):
continue
head, tail = os.path.split(mypath)
if head in lib_dirs:
libdir_contents_changed = True
break
if not libdir_contents_changed:
makelinks = False
ldconfig = "/sbin/ldconfig"
if "CHOST" in settings and "CBUILD" in settings and \
settings["CHOST"] != settings["CBUILD"]:
ldconfig = find_binary("%s-ldconfig" % settings["CHOST"])
# Only run ldconfig as needed
if makelinks and ldconfig and not eprefix:
# ldconfig has very different behaviour between FreeBSD and Linux
if ostype == "Linux" or ostype.lower().endswith("gnu"):
# We can't update links if we haven't cleaned other versions first, as
# an older package installed ON TOP of a newer version will cause ldconfig
# to overwrite the symlinks we just made. -X means no links. After 'clean'
# we can safely create links.
writemsg_level(_(">>> Regenerating %setc/ld.so.cache...\n") % \
(target_root,))
os.system("cd / ; %s -X -r '%s'" % (ldconfig, target_root))
elif ostype in ("FreeBSD", "DragonFly"):
writemsg_level(_(">>> Regenerating %svar/run/ld-elf.so.hints...\n") % \
target_root)
os.system(("cd / ; %s -elf -i " + \
"-f '%svar/run/ld-elf.so.hints' '%setc/ld.so.conf'") % \
(ldconfig, target_root, target_root))
del specials["LDPATH"]
penvnotice = "# THIS FILE IS AUTOMATICALLY GENERATED BY env-update.\n"
penvnotice += "# DO NOT EDIT THIS FILE. CHANGES TO STARTUP PROFILES\n"
cenvnotice = penvnotice[:]
penvnotice += "# GO INTO /etc/profile NOT /etc/profile.env\n\n"
cenvnotice += "# GO INTO /etc/csh.cshrc NOT /etc/csh.env\n\n"
#create /etc/profile.env for bash support
outfile = atomic_ofstream(os.path.join(eroot, "etc", "profile.env"))
outfile.write(penvnotice)
env_keys = [x for x in env if x != "LDPATH"]
env_keys.sort()
for k in env_keys:
v = env[k]
if v.startswith('$') and not v.startswith('${'):
outfile.write("export %s=$'%s'\n" % (k, v[1:]))
else:
outfile.write("export %s='%s'\n" % (k, v))
outfile.close()
#create /etc/csh.env for (t)csh support
outfile = atomic_ofstream(os.path.join(eroot, "etc", "csh.env"))
outfile.write(cenvnotice)
for x in env_keys:
outfile.write("setenv %s '%s'\n" % (x, env[x]))
outfile.close()
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