module Thin::Daemonizable::ClassMethods
Public Instance Methods
force_kill(pid, pid_file)
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# File lib/thin/daemonizing.rb, line 160 def force_kill(pid, pid_file) Logging.log_info "Sending KILL signal to process #{pid} ... " Process.kill("KILL", pid) File.delete(pid_file) if File.exist?(pid_file) end
kill(pid_file, timeout=60)
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Send a QUIT or INT (if timeout is 0
) signal the process which PID is stored in pid_file
. If the process is still running after timeout
, KILL signal is sent.
# File lib/thin/daemonizing.rb, line 117 def kill(pid_file, timeout=60) if timeout == 0 send_signal('INT', pid_file, timeout) else send_signal('QUIT', pid_file, timeout) end end
monotonic_time()
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# File lib/thin/daemonizing.rb, line 130 def monotonic_time Process.clock_gettime(Process::CLOCK_MONOTONIC) end
read_pid_file(file)
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# File lib/thin/daemonizing.rb, line 166 def read_pid_file(file) if File.file?(file) && pid = File.read(file) pid.to_i else nil end end
restart(pid_file)
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Restart the server by sending HUP signal.
# File lib/thin/daemonizing.rb, line 126 def restart(pid_file) send_signal('HUP', pid_file) end
send_signal(signal, pid_file, timeout=60)
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Send a signal
to the process which PID is stored in pid_file
.
# File lib/thin/daemonizing.rb, line 135 def send_signal(signal, pid_file, timeout=60) if pid = read_pid_file(pid_file) Logging.log_info "Sending #{signal} signal to process #{pid} ... " Process.kill(signal, pid) # This loop seems kind of racy to me... started_at = monotonic_time while Process.running?(pid) sleep 0.1 raise Timeout::Error if (monotonic_time - started_at) > timeout end else raise PidFileNotFound, "Can't stop process, no PID found in #{pid_file}" end rescue Timeout::Error Logging.log_info "Timeout!" force_kill(pid, pid_file) rescue Interrupt force_kill(pid, pid_file) rescue Errno::ESRCH # No such process Logging.log_info "process not found!" force_kill(pid, pid_file) end