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# Copyright 2010 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
__all__ = ['env_update']
import codecs
import errno
import stat
import sys
import time
import portage
from portage import os, _encodings, _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
if sys.hexversion >= 0x3000000:
long = int
def env_update(makelinks=1, target_root=None, prev_mtimes=None, contents=None,
env=None, writemsg_level=None):
"""
Parse /etc/env.d and use it to generate /etc/profile.env, csh.env,
ld.so.conf, and prelink.conf. Finally, run ldconfig.
"""
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:
env = os.environ
envd_dir = os.path.join(target_root, "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(target_root, "etc", "ld.so.conf")
try:
myld = codecs.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
ld_cache_update=False
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()
ld_cache_update=True
# Update prelink.conf if we are prelink-enabled
if prelink_capable:
newprelink = atomic_ofstream(
os.path.join(target_root, "etc", "prelink.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 ["/bin","/sbin","/usr/bin","/usr/sbin","/lib","/usr/lib"]:
newprelink.write("-l %s\n" % (x,));
prelink_paths = []
prelink_paths += specials.get("LDPATH", [])
prelink_paths += specials.get("PATH", [])
prelink_paths += 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()
# Portage stores mtimes with 1 second granularity but in >=python-2.5 finer
# granularity is possible. In order to avoid the potential ambiguity of
# mtimes that differ by less than 1 second, sleep here if any of the
# directories have been modified during the current second.
sleep_for_mtime_granularity = False
current_time = long(time.time())
mtime_changed = False
lib_dirs = set()
for lib_dir in set(specials["LDPATH"] + \
['usr/lib','usr/lib64','usr/lib32','lib','lib64','lib32']):
x = os.path.join(target_root, 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:
sleep_for_mtime_granularity = True
if 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 mtime_changed:
ld_cache_update = True
if makelinks and \
not ld_cache_update 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 env and "CBUILD" in env and \
env["CHOST"] != env["CBUILD"]:
ldconfig = find_binary("%s-ldconfig" % env["CHOST"])
# Only run ldconfig as needed
if (ld_cache_update or makelinks) and ldconfig:
# 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,))
if makelinks:
os.system("cd / ; %s -r '%s'" % (ldconfig, target_root))
else:
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(target_root, "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(target_root, "etc", "csh.env"))
outfile.write(cenvnotice)
for x in env_keys:
outfile.write("setenv %s '%s'\n" % (x, env[x]))
outfile.close()
if sleep_for_mtime_granularity:
while current_time == long(time.time()):
time.sleep(1)
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