Class: Chef::Daemon
- Inherits:
-
Object
- Object
- Chef::Daemon
- Defined in:
- lib/chef/daemon.rb
Class Attribute Summary collapse
-
.name ⇒ Object
Returns the value of attribute name.
-
.runlock ⇒ Object
Returns the value of attribute runlock.
Class Method Summary collapse
-
._change_privilege(user, group = user) ⇒ Object
Change privileges of the process to be the specified user and group.
-
.change_privilege ⇒ Object
Change process user/group to those specified in Chef::Config.
-
.daemonize(name) ⇒ Object
Daemonize the current process, managing pidfiles and process uid/gid.
-
.pid_file ⇒ Object
- Gets the pid file for @name ==== Returns String
-
Location of the pid file for @name.
-
.pid_from_file ⇒ Object
- Suck the pid out of pid_file ==== Returns Integer
- The PID from pid_file nil
-
Returned if the pid_file does not exist.
Class Attribute Details
.name ⇒ Object
Returns the value of attribute name.
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# File 'lib/chef/daemon.rb', line 27 def name @name end |
.runlock ⇒ Object
Returns the value of attribute runlock.
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# File 'lib/chef/daemon.rb', line 28 def runlock @runlock end |
Class Method Details
._change_privilege(user, group = user) ⇒ Object
Change privileges of the process to be the specified user and group
Parameters
- user<String>
-
The user to change the process to.
- group<String>
-
The group to change the process to.
Alternatives
If group is left out, the user will be used (changing to user:user)
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# File 'lib/chef/daemon.rb', line 103 def _change_privilege(user, group = user) uid, gid = Process.euid, Process.egid begin target_uid = Etc.getpwnam(user).uid rescue ArgumentError => e Chef::Application.fatal!("Failed to get UID for user #{user}, does it exist? #{e.}") return false end begin target_gid = Etc.getgrnam(group).gid rescue ArgumentError => e Chef::Application.fatal!("Failed to get GID for group #{group}, does it exist? #{e.}") return false end if (uid != target_uid) || (gid != target_gid) Process.initgroups(user, target_gid) Process::GID.change_privilege(target_gid) Process::UID.change_privilege(target_uid) end true rescue Errno::EPERM => e Chef::Application.fatal!("Permission denied when trying to change #{uid}:#{gid} to #{target_uid}:#{target_gid}. #{e.}") end |
.change_privilege ⇒ Object
Change process user/group to those specified in Chef::Config
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# File 'lib/chef/daemon.rb', line 82 def change_privilege Dir.chdir("/") if Chef::Config[:user] && Chef::Config[:group] Chef::Log.info("About to change privilege to #{Chef::Config[:user]}:#{Chef::Config[:group]}") _change_privilege(Chef::Config[:user], Chef::Config[:group]) elsif Chef::Config[:user] Chef::Log.info("About to change privilege to #{Chef::Config[:user]}") _change_privilege(Chef::Config[:user]) end end |
.daemonize(name) ⇒ Object
Daemonize the current process, managing pidfiles and process uid/gid
Parameters
- name<String>
-
The name to be used for the pid file
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# File 'lib/chef/daemon.rb', line 35 def daemonize(name) @name = name @runlock = RunLock.new(pid_file) if runlock.test # We've acquired the daemon lock. Now daemonize. Chef::Log.info("Daemonizing..") begin exit if fork Process.setsid exit if fork Chef::Log.info("Forked, in #{Process.pid}. Privileges: #{Process.euid} #{Process.egid}") File.umask Chef::Config[:umask] $stdin.reopen("/dev/null") $stdout.reopen("/dev/null", "a") $stderr.reopen($stdout) runlock.save_pid rescue NotImplementedError => e Chef::Application.fatal!("There is no fork: #{e.}") end else Chef::Application.fatal!("Chef is already running pid #{pid_from_file}") end end |
.pid_file ⇒ Object
Gets the pid file for @name
Returns
- String
-
Location of the pid file for @name
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# File 'lib/chef/daemon.rb', line 63 def pid_file Chef::Config[:pid_file] || "/tmp/#{@name}.pid" end |
.pid_from_file ⇒ Object
Suck the pid out of pid_file
Returns
- Integer
-
The PID from pid_file
- nil
-
Returned if the pid_file does not exist.
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# File 'lib/chef/daemon.rb', line 74 def pid_from_file File.read(pid_file).chomp.to_i rescue Errno::ENOENT, Errno::EACCES nil end |