This class and its members can be considered a stable interface and will not change in a backwards-incompatible fashion between releases of Unicorn. You may need to access it in the before_fork/after_fork hooks. See the Unicorn::Configurator RDoc for examples.
worker objects may be compared to just plain numbers
# File lib/unicorn/worker.rb, line 10 def ==(other_nr) self.nr == other_nr end
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
# File lib/unicorn/worker.rb, line 24 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
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