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poky/meta/classes/useradd-staticids.bbclass
David Vincent f4fedefe49 extrausers: Use static ids when available 
When creating users at the image level using extrausers class, the
current behavior is to ignore the status of USERADDEXTENSION. This could
lead to undefined behavior when static ids are expected but the system
falls back to dynamic ones.

(From OE-Core rev: 331140e892f84b70bced44a0b5d14f32ec95042e)

Signed-off-by: David Vincent <freesilicon@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2017-01-19 22:47:20 +00:00

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# In order to support a deterministic set of 'dynamic' users/groups,
# we need a function to reformat the params based on a static file
def update_useradd_static_config(d):
import argparse
import itertools
import re
import errno
class myArgumentParser( argparse.ArgumentParser ):
def _print_message(self, message, file=None):
bb.warn("%s - %s: %s" % (d.getVar('PN'), pkg, message))
# This should never be called...
def exit(self, status=0, message=None):
message = message or ("%s - %s: useradd.bbclass: Argument parsing exited" % (d.getVar('PN'), pkg))
error(message)
def error(self, message):
bb.fatal(message)
def list_extend(iterable, length, obj = None):
"""Ensure that iterable is the specified length by extending with obj
and return it as a list"""
return list(itertools.islice(itertools.chain(iterable, itertools.repeat(obj)), length))
def merge_files(file_list, exp_fields):
"""Read each passwd/group file in file_list, split each line and create
a dictionary with the user/group names as keys and the split lines as
values. If the user/group name already exists in the dictionary, then
update any fields in the list with the values from the new list (if they
are set)."""
id_table = dict()
for conf in file_list.split():
try:
with open(conf, "r") as f:
for line in f:
if line.startswith('#'):
continue
# Make sure there always are at least exp_fields
# elements in the field list. This allows for leaving
# out trailing colons in the files.
fields = list_extend(line.rstrip().split(":"), exp_fields)
if fields[0] not in id_table:
id_table[fields[0]] = fields
else:
id_table[fields[0]] = list(map(lambda x, y: x or y, fields, id_table[fields[0]]))
except IOError as e:
if e.errno == errno.ENOENT:
pass
return id_table
def handle_missing_id(id, type, pkg):
# For backwards compatibility we accept "1" in addition to "error"
if d.getVar('USERADD_ERROR_DYNAMIC') == 'error' or d.getVar('USERADD_ERROR_DYNAMIC') == '1':
raise NotImplementedError("%s - %s: %sname %s does not have a static ID defined. Skipping it." % (d.getVar('PN'), pkg, type, id))
elif d.getVar('USERADD_ERROR_DYNAMIC') == 'warn':
bb.warn("%s - %s: %sname %s does not have a static ID defined." % (d.getVar('PN'), pkg, type, id))
# We parse and rewrite the useradd components
def rewrite_useradd(params, is_pkg):
# The following comes from --help on useradd from shadow
parser = myArgumentParser(prog='useradd')
parser.add_argument("-b", "--base-dir", metavar="BASE_DIR", help="base directory for the home directory of the new account")
parser.add_argument("-c", "--comment", metavar="COMMENT", help="GECOS field of the new account")
parser.add_argument("-d", "--home-dir", metavar="HOME_DIR", help="home directory of the new account")
parser.add_argument("-D", "--defaults", help="print or change default useradd configuration", action="store_true")
parser.add_argument("-e", "--expiredate", metavar="EXPIRE_DATE", help="expiration date of the new account")
parser.add_argument("-f", "--inactive", metavar="INACTIVE", help="password inactivity period of the new account")
parser.add_argument("-g", "--gid", metavar="GROUP", help="name or ID of the primary group of the new account")
parser.add_argument("-G", "--groups", metavar="GROUPS", help="list of supplementary groups of the new account")
parser.add_argument("-k", "--skel", metavar="SKEL_DIR", help="use this alternative skeleton directory")
parser.add_argument("-K", "--key", metavar="KEY=VALUE", help="override /etc/login.defs defaults")
parser.add_argument("-l", "--no-log-init", help="do not add the user to the lastlog and faillog databases", action="store_true")
parser.add_argument("-m", "--create-home", help="create the user's home directory", action="store_const", const=True)
parser.add_argument("-M", "--no-create-home", dest="create_home", help="do not create the user's home directory", action="store_const", const=False)
parser.add_argument("-N", "--no-user-group", dest="user_group", help="do not create a group with the same name as the user", action="store_const", const=False)
parser.add_argument("-o", "--non-unique", help="allow to create users with duplicate (non-unique UID)", action="store_true")
parser.add_argument("-p", "--password", metavar="PASSWORD", help="encrypted password of the new account")
parser.add_argument("-R", "--root", metavar="CHROOT_DIR", help="directory to chroot into")
parser.add_argument("-r", "--system", help="create a system account", action="store_true")
parser.add_argument("-s", "--shell", metavar="SHELL", help="login shell of the new account")
parser.add_argument("-u", "--uid", metavar="UID", help="user ID of the new account")
parser.add_argument("-U", "--user-group", help="create a group with the same name as the user", action="store_const", const=True)
parser.add_argument("LOGIN", help="Login name of the new user")
# Return a list of configuration files based on either the default
# files/passwd or the contents of USERADD_UID_TABLES
# paths are resolved via BBPATH
def get_passwd_list(d):
str = ""
bbpath = d.getVar('BBPATH')
passwd_tables = d.getVar('USERADD_UID_TABLES')
if not passwd_tables:
passwd_tables = 'files/passwd'
for conf_file in passwd_tables.split():
str += " %s" % bb.utils.which(bbpath, conf_file)
return str
newparams = []
users = None
for param in re.split('''[ \t]*;[ \t]*(?=(?:[^'"]|'[^']*'|"[^"]*")*$)''', params):
param = param.strip()
if not param:
continue
try:
uaargs = parser.parse_args(re.split('''[ \t]+(?=(?:[^'"]|'[^']*'|"[^"]*")*$)''', param))
except:
bb.fatal("%s: Unable to parse arguments for USERADD_PARAM_%s: '%s'" % (d.getVar('PN'), pkg, param))
# Read all passwd files specified in USERADD_UID_TABLES or files/passwd
# Use the standard passwd layout:
# username:password:user_id:group_id:comment:home_directory:login_shell
#
# If a field is left blank, the original value will be used. The 'username'
# field is required.
#
# Note: we ignore the password field, as including even the hashed password
# in the useradd command may introduce a security hole. It's assumed that
# all new users get the default ('*' which prevents login) until the user is
# specifically configured by the system admin.
if not users:
users = merge_files(get_passwd_list(d), 7)
if uaargs.LOGIN not in users:
if not uaargs.uid or not uaargs.uid.isdigit() or not uaargs.gid:
handle_missing_id(uaargs.LOGIN, 'user', pkg)
continue
field = users[uaargs.LOGIN]
if uaargs.uid and field[2] and (uaargs.uid != field[2]):
bb.warn("%s: Changing username %s's uid from (%s) to (%s), verify configuration files!" % (d.getVar('PN'), uaargs.LOGIN, uaargs.uid, field[2]))
uaargs.uid = field[2] or uaargs.uid
# Determine the possible groupname
# Unless the group name (or gid) is specified, we assume that the LOGIN is the groupname
#
# By default the system has creation of the matching groups enabled
# So if the implicit username-group creation is on, then the implicit groupname (LOGIN)
# is used, and we disable the user_group option.
#
user_group = uaargs.user_group is None or uaargs.user_group is True
uaargs.groupname = uaargs.LOGIN if user_group else uaargs.gid
uaargs.groupid = field[3] or uaargs.gid or uaargs.groupname
if uaargs.groupid and uaargs.gid != uaargs.groupid:
newgroup = None
if not uaargs.groupid.isdigit():
# We don't have a group number, so we have to add a name
bb.debug(1, "Adding group %s!" % uaargs.groupid)
newgroup = "%s %s" % (' --system' if uaargs.system else '', uaargs.groupid)
elif uaargs.groupname and not uaargs.groupname.isdigit():
# We have a group name and a group number to assign it to
bb.debug(1, "Adding group %s (gid %s)!" % (uaargs.groupname, uaargs.groupid))
newgroup = "-g %s %s" % (uaargs.groupid, uaargs.groupname)
else:
# We want to add a group, but we don't know it's name... so we can't add the group...
# We have to assume the group has previously been added or we'll fail on the adduser...
# Note: specifying the actual gid is very rare in OE, usually the group name is specified.
bb.warn("%s: Changing gid for login %s to %s, verify configuration files!" % (d.getVar('PN'), uaargs.LOGIN, uaargs.groupid))
uaargs.gid = uaargs.groupid
uaargs.user_group = None
if newgroup and is_pkg:
groupadd = d.getVar("GROUPADD_PARAM_%s" % pkg)
if groupadd:
d.setVar("GROUPADD_PARAM_%s" % pkg, "%s; %s" % (groupadd, newgroup))
else:
d.setVar("GROUPADD_PARAM_%s" % pkg, newgroup)
uaargs.comment = "'%s'" % field[4] if field[4] else uaargs.comment
uaargs.home_dir = field[5] or uaargs.home_dir
uaargs.shell = field[6] or uaargs.shell
# Should be an error if a specific option is set...
if not uaargs.uid or not uaargs.uid.isdigit() or not uaargs.gid:
handle_missing_id(uaargs.LOGIN, 'user', pkg)
# Reconstruct the args...
newparam = ['', ' --defaults'][uaargs.defaults]
newparam += ['', ' --base-dir %s' % uaargs.base_dir][uaargs.base_dir != None]
newparam += ['', ' --comment %s' % uaargs.comment][uaargs.comment != None]
newparam += ['', ' --home-dir %s' % uaargs.home_dir][uaargs.home_dir != None]
newparam += ['', ' --expiredata %s' % uaargs.expiredate][uaargs.expiredate != None]
newparam += ['', ' --inactive %s' % uaargs.inactive][uaargs.inactive != None]
newparam += ['', ' --gid %s' % uaargs.gid][uaargs.gid != None]
newparam += ['', ' --groups %s' % uaargs.groups][uaargs.groups != None]
newparam += ['', ' --skel %s' % uaargs.skel][uaargs.skel != None]
newparam += ['', ' --key %s' % uaargs.key][uaargs.key != None]
newparam += ['', ' --no-log-init'][uaargs.no_log_init]
newparam += ['', ' --create-home'][uaargs.create_home is True]
newparam += ['', ' --no-create-home'][uaargs.create_home is False]
newparam += ['', ' --no-user-group'][uaargs.user_group is False]
newparam += ['', ' --non-unique'][uaargs.non_unique]
newparam += ['', ' --password %s' % uaargs.password][uaargs.password != None]
newparam += ['', ' --root %s' % uaargs.root][uaargs.root != None]
newparam += ['', ' --system'][uaargs.system]
newparam += ['', ' --shell %s' % uaargs.shell][uaargs.shell != None]
newparam += ['', ' --uid %s' % uaargs.uid][uaargs.uid != None]
newparam += ['', ' --user-group'][uaargs.user_group is True]
newparam += ' %s' % uaargs.LOGIN
newparams.append(newparam)
return ";".join(newparams).strip()
# We parse and rewrite the groupadd components
def rewrite_groupadd(params, is_pkg):
# The following comes from --help on groupadd from shadow
parser = myArgumentParser(prog='groupadd')
parser.add_argument("-f", "--force", help="exit successfully if the group already exists, and cancel -g if the GID is already used", action="store_true")
parser.add_argument("-g", "--gid", metavar="GID", help="use GID for the new group")
parser.add_argument("-K", "--key", metavar="KEY=VALUE", help="override /etc/login.defs defaults")
parser.add_argument("-o", "--non-unique", help="allow to create groups with duplicate (non-unique) GID", action="store_true")
parser.add_argument("-p", "--password", metavar="PASSWORD", help="use this encrypted password for the new group")
parser.add_argument("-R", "--root", metavar="CHROOT_DIR", help="directory to chroot into")
parser.add_argument("-r", "--system", help="create a system account", action="store_true")
parser.add_argument("GROUP", help="Group name of the new group")
# Return a list of configuration files based on either the default
# files/group or the contents of USERADD_GID_TABLES
# paths are resolved via BBPATH
def get_group_list(d):
str = ""
bbpath = d.getVar('BBPATH')
group_tables = d.getVar('USERADD_GID_TABLES')
if not group_tables:
group_tables = 'files/group'
for conf_file in group_tables.split():
str += " %s" % bb.utils.which(bbpath, conf_file)
return str
newparams = []
groups = None
for param in re.split('''[ \t]*;[ \t]*(?=(?:[^'"]|'[^']*'|"[^"]*")*$)''', params):
param = param.strip()
if not param:
continue
try:
# If we're processing multiple lines, we could have left over values here...
gaargs = parser.parse_args(re.split('''[ \t]+(?=(?:[^'"]|'[^']*'|"[^"]*")*$)''', param))
except:
bb.fatal("%s: Unable to parse arguments for GROUPADD_PARAM_%s: '%s'" % (d.getVar('PN'), pkg, param))
# Read all group files specified in USERADD_GID_TABLES or files/group
# Use the standard group layout:
# groupname:password:group_id:group_members
#
# If a field is left blank, the original value will be used. The 'groupname' field
# is required.
#
# Note: similar to the passwd file, the 'password' filed is ignored
# Note: group_members is ignored, group members must be configured with the GROUPMEMS_PARAM
if not groups:
groups = merge_files(get_group_list(d), 4)
if gaargs.GROUP not in groups:
if not gaargs.gid or not gaargs.gid.isdigit():
handle_missing_id(gaargs.GROUP, 'group', pkg)
continue
field = groups[gaargs.GROUP]
if field[2]:
if gaargs.gid and (gaargs.gid != field[2]):
bb.warn("%s: Changing groupname %s's gid from (%s) to (%s), verify configuration files!" % (d.getVar('PN'), gaargs.GROUP, gaargs.gid, field[2]))
gaargs.gid = field[2]
if not gaargs.gid or not gaargs.gid.isdigit():
handle_missing_id(gaargs.GROUP, 'group', pkg)
# Reconstruct the args...
newparam = ['', ' --force'][gaargs.force]
newparam += ['', ' --gid %s' % gaargs.gid][gaargs.gid != None]
newparam += ['', ' --key %s' % gaargs.key][gaargs.key != None]
newparam += ['', ' --non-unique'][gaargs.non_unique]
newparam += ['', ' --password %s' % gaargs.password][gaargs.password != None]
newparam += ['', ' --root %s' % gaargs.root][gaargs.root != None]
newparam += ['', ' --system'][gaargs.system]
newparam += ' %s' % gaargs.GROUP
newparams.append(newparam)
return ";".join(newparams).strip()
# The parsing of the current recipe depends on the content of
# the files listed in USERADD_UID/GID_TABLES. We need to tell bitbake
# about that explicitly to trigger re-parsing and thus re-execution of
# this code when the files change.
bbpath = d.getVar('BBPATH')
for varname, default in (('USERADD_UID_TABLES', 'files/passwd'),
('USERADD_GID_TABLES', 'files/group')):
tables = d.getVar(varname)
if not tables:
tables = default
for conf_file in tables.split():
bb.parse.mark_dependency(d, bb.utils.which(bbpath, conf_file))
# Load and process the users and groups, rewriting the adduser/addgroup params
useradd_packages = d.getVar('USERADD_PACKAGES') or ""
for pkg in useradd_packages.split():
# Groupmems doesn't have anything we might want to change, so simply validating
# is a bit of a waste -- only process useradd/groupadd
useradd_param = d.getVar('USERADD_PARAM_%s' % pkg)
if useradd_param:
#bb.warn("Before: 'USERADD_PARAM_%s' - '%s'" % (pkg, useradd_param))
d.setVar('USERADD_PARAM_%s' % pkg, rewrite_useradd(useradd_param, True))
#bb.warn("After: 'USERADD_PARAM_%s' - '%s'" % (pkg, d.getVar('USERADD_PARAM_%s' % pkg)))
groupadd_param = d.getVar('GROUPADD_PARAM_%s' % pkg)
if groupadd_param:
#bb.warn("Before: 'GROUPADD_PARAM_%s' - '%s'" % (pkg, groupadd_param))
d.setVar('GROUPADD_PARAM_%s' % pkg, rewrite_groupadd(groupadd_param, True))
#bb.warn("After: 'GROUPADD_PARAM_%s' - '%s'" % (pkg, d.getVar('GROUPADD_PARAM_%s' % pkg)))
# Load and process extra users and groups, rewriting only adduser/addgroup params
pkg = d.getVar('PN')
extrausers = d.getVar('EXTRA_USERS_PARAMS') or ""
#bb.warn("Before: 'EXTRA_USERS_PARAMS' - '%s'" % (d.getVar('EXTRA_USERS_PARAMS')))
new_extrausers = []
for cmd in re.split('''[ \t]*;[ \t]*(?=(?:[^'"]|'[^']*'|"[^"]*")*$)''', extrausers):
cmd = cmd.strip()
if not cmd:
continue
if re.match('''useradd (.*)''', cmd):
useradd_param = re.match('''useradd (.*)''', cmd).group(1)
useradd_param = rewrite_useradd(useradd_param, False)
cmd = 'useradd %s' % useradd_param
elif re.match('''groupadd (.*)''', cmd):
groupadd_param = re.match('''groupadd (.*)''', cmd).group(1)
groupadd_param = rewrite_groupadd(groupadd_param, False)
cmd = 'groupadd %s' % groupadd_param
new_extrausers.append(cmd)
new_extrausers.append('')
d.setVar('EXTRA_USERS_PARAMS', ';'.join(new_extrausers))
#bb.warn("After: 'EXTRA_USERS_PARAMS' - '%s'" % (d.getVar('EXTRA_USERS_PARAMS')))
python __anonymous() {
if not bb.data.inherits_class('nativesdk', d) \
and not bb.data.inherits_class('native', d):
try:
update_useradd_static_config(d)
except NotImplementedError as f:
bb.debug(1, "Skipping recipe %s: %s" % (d.getVar('PN'), f))
raise bb.parse.SkipPackage(f)
}
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