1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
| | # -*- encoding: binary -*-
require 'fcntl'
require 'tmpdir'
module Unicorn
class TmpIO < ::File
# for easier env["rack.input"] compatibility
def size
# flush if sync
stat.size
end
end
module Util
class << self
def is_log?(fp)
append_flags = File::WRONLY | File::APPEND
! fp.closed? &&
fp.sync &&
fp.path[0] == ?/ &&
(fp.fcntl(Fcntl::F_GETFL) & append_flags) == append_flags
rescue IOError, Errno::EBADF
false
end
def chown_logs(uid, gid)
ObjectSpace.each_object(File) do |fp|
fp.chown(uid, gid) if is_log?(fp)
end
end
# 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
def 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
# creates and returns a new File object. The File is unlinked
# immediately, switched to binary mode, and userspace output
# buffering is disabled
def tmpio
fp = begin
TmpIO.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
end
end
end
|