Class: Unicorn::Util

Inherits:
Object
  • Object
show all
Defined in:
lib/unicorn/util.rb

Class Method Summary collapse

Class Method Details

.reopen_logs ⇒ Object

This reopens ALL logfiles in the process that have been rotated using logrotate(8) (without copytruncate) or similar tools. A File object is considered for reopening if it is:

1) opened with the O_APPEND and O_WRONLY flags
2) opened with an absolute path (starts with "/")
3) the current open file handle does not match its original open path
4) unbuffered (as far as userspace buffering goes, not O_SYNC)

Returns the number of files reopened



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# File 'lib/unicorn/util.rb', line 18

def reopen_logs
  nr = 0
  append_flags = File::WRONLY | File::APPEND

  ObjectSpace.each_object(File) do |fp|
    next if fp.closed?
    next unless (fp.sync && fp.path[0..0] == "/")
    next unless (fp.fcntl(Fcntl::F_GETFL) & append_flags) == append_flags

    begin
      a, b = fp.stat, File.stat(fp.path)
      next if a.ino == b.ino && a.dev == b.dev
    rescue Errno::ENOENT
    end

    open_arg = 'a'
    if fp.respond_to?(:external_encoding) && enc = fp.external_encoding
      open_arg << ":#{enc.to_s}"
      enc = fp.internal_encoding and open_arg << ":#{enc.to_s}"
    end
    fp.reopen(fp.path, open_arg)
    fp.sync = true
    nr += 1
  end # each_object
  nr
end

.tmpio ⇒ Object

creates and returns a new File object. The File is unlinked immediately, switched to binary mode, and userspace output buffering is disabled



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# File 'lib/unicorn/util.rb', line 48

def tmpio
  fp = begin
    File.open("#{Dir::tmpdir}/#{rand}",
              File::RDWR|File::CREAT|File::EXCL, 0600)
  rescue Errno::EEXIST
    retry
  end
  File.unlink(fp.path)
  fp.binmode
  fp.sync = true
  fp
end