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) the current open file handle does not match its original open path 3) unbuffered (as far as userspace buffering goes, not O_SYNC)
Returns the number of files reopened
In Unicorn 3.5.x and earlier, files must be opened with an absolute path to be considered a log file.
# File lib/unicorn/util.rb, line 32 def self.reopen_logs to_reopen = [] nr = 0 ObjectSpace.each_object(File) { |fp| is_log?(fp) and to_reopen << fp } to_reopen.each do |fp| orig_st = begin fp.stat rescue IOError, Errno::EBADF next end begin b = File.stat(fp.path) next if orig_st.ino == b.ino && orig_st.dev == b.dev rescue Errno::ENOENT end begin File.open(fp.path, 'a') { |tmpfp| fp.reopen(tmpfp) } fp.sync = true new_st = fp.stat # this should only happen in the master: if orig_st.uid != new_st.uid || orig_st.gid != new_st.gid fp.chown(orig_st.uid, orig_st.gid) end nr += 1 rescue IOError, Errno::EBADF # not much we can do... end end nr end
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