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| | # -*- encoding: binary -*-
# This class and its members can be considered a stable interface
# and will not change in a backwards-incompatible fashion between
# releases of \Unicorn. Knowledge of this class is generally not
# not needed for most users of \Unicorn.
#
# Some users may want to access it in the before_fork/after_fork hooks.
# See the Unicorn::Configurator RDoc for examples.
class Unicorn::Worker < Struct.new(:nr, :tmp, :switched)
# worker objects may be compared to just plain Integers
def ==(other_nr) # :nodoc:
nr == other_nr
end
# In most cases, you should be using the Unicorn::Configurator#user
# directive instead. This method should only be used if you need
# fine-grained control of exactly when you want to change permissions
# in your after_fork hooks.
#
# Changes the worker process to the specified +user+ and +group+
# This is only intended to be called from within the worker
# process from the +after_fork+ hook. This should be called in
# the +after_fork+ hook after any priviledged functions need to be
# run (e.g. to set per-worker CPU affinity, niceness, etc)
#
# Any and all errors raised within this method will be propagated
# directly back to the caller (usually the +after_fork+ hook.
# These errors commonly include ArgumentError for specifying an
# invalid user/group and Errno::EPERM for insufficient priviledges
def user(user, group = nil)
# we do not protect the caller, checking Process.euid == 0 is
# insufficient because modern systems have fine-grained
# capabilities. Let the caller handle any and all errors.
uid = Etc.getpwnam(user).uid
gid = Etc.getgrnam(group).gid if group
Unicorn::Util.chown_logs(uid, gid)
tmp.chown(uid, gid)
if gid && Process.egid != gid
Process.initgroups(user, gid)
Process::GID.change_privilege(gid)
end
Process.euid != uid and Process::UID.change_privilege(uid)
self.switched = true
end
end
|