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
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
#
# Author:: Adam Jacob (<adam@hjksolutions.com>)
# Copyright:: Copyright (c) 2008 HJK Solutions, LLC
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
require 'tmpdir'
require 'fcntl'
require 'etc'
class Chef
module Mixin
module Command
def run_command(args={})
if args.has_key?(:creates)
if File.exists?(args[:creates])
Chef::Log.debug("Skipping #{args[:command_string]} - creates #{args[:creates]} exists.")
return false
end
end
if args.has_key?(:onlyif)
status = popen4(args[:onlyif]) { |p, i, o, e| }
if status.exitstatus != 0
Chef::Log.debug("Skipping #{args[:command_string]} - onlyif #{args[:onlyif]} returned #{status.exitstatus}")
return false
end
end
if args.has_key?(:unless)
status = popen4(args[:unless]) { |p, i, o, e| }
if status.exitstatus == 0
Chef::Log.debug("Skipping #{args[:command_string]} - unless #{args[:unless]} returned #{status.exitstatus}")
return false
end
end
exec_processing_block = lambda do |pid, stdin, stdout, stderr|
stdin.close
stdout_string = stdout.gets(nil)
if stdout_string
Chef::Log.debug("---- Begin #{args[:command_string]} STDOUT ----")
Chef::Log.debug(stdout_string.strip)
Chef::Log.debug("---- End #{args[:command_string]} STDOUT ----")
end
stderr_string = stderr.gets(nil)
if stderr_string
Chef::Log.debug("---- Begin #{args[:command_string]} STDERR ----")
Chef::Log.debug(stderr_string.strip)
Chef::Log.debug("---- End #{args[:command_string]} STDERR ----")
end
end
args[:cwd] ||= Dir.tmpdir
unless File.directory?(args[:cwd])
raise Chef::Exception::Exec, "#{args[:cwd]} does not exist or is not a directory"
end
status = nil
Dir.chdir(args[:cwd]) do
if args[:timeout]
begin
Timeout.timeout(args[:timeout]) do
status = popen4(args[:command], args, &exec_processing_block)
end
rescue Exception => e
Chef::Log.error("#{args[:command_string]} exceeded timeout #{args[:timeout]}")
raise(e)
end
else
status = popen4(args[:command], args, &exec_processing_block)
end
args[:returns] ||= 0
if status.exitstatus != args[:returns]
raise Chef::Exception::Exec, "#{args[:command_string]} returned #{status.exitstatus}, expected #{args[:returns]}"
else
Chef::Log.debug("Ran #{args[:command_string]} (#{args[:command]}) returned #{status.exitstatus}")
end
end
status
end
module_function :run_command
# This is taken directly from Ara T Howard's Open4 library, and then
# modified to suit the needs of Chef. Any bugs here are most likely
# my own, and not Ara.
#
# The original appears in external/open4.rb in it's unmodified form.
#
# Thanks, Ara.
def popen4(cmd, args={}, &b)
args[:user] ||= nil
unless args[:user].kind_of?(Integer)
args[:user] = Etc.getpwnam(args[:user]).uid if args[:user]
end
args[:group] ||= nil
unless args[:group].kind_of?(Integer)
args[:group] = Etc.getgrnam(args[:group]).gid if args[:group]
end
args[:environment] ||= nil
pw, pr, pe, ps = IO.pipe, IO.pipe, IO.pipe, IO.pipe
verbose = $VERBOSE
begin
$VERBOSE = nil
ps.last.fcntl(Fcntl::F_SETFD, Fcntl::FD_CLOEXEC)
cid = fork {
pw.last.close
STDIN.reopen pw.first
pw.first.close
pr.first.close
STDOUT.reopen pr.last
pr.last.close
pe.first.close
STDERR.reopen pe.last
pe.last.close
STDOUT.sync = STDERR.sync = true
if args[:user]
Process.euid = args[:user]
Process.uid = args[:user]
end
if args[:group]
Process.egid = args[:group]
Process.gid = args[:group]
end
if args[:environment]
args[:environment].each do |key,value|
ENV[key] = value
end
end
begin
if cmd.kind_of?(Array)
exec(*cmd)
else
exec(cmd)
end
raise 'forty-two'
rescue Exception => e
Marshal.dump(e, ps.last)
ps.last.flush
end
ps.last.close unless (ps.last.closed?)
exit!
}
ensure
$VERBOSE = verbose
end
[pw.first, pr.last, pe.last, ps.last].each{|fd| fd.close}
begin
e = Marshal.load ps.first
raise(Exception === e ? e : "unknown failure!")
rescue EOFError # If we get an EOF error, then the exec was successful
42
ensure
ps.first.close
end
pw.last.sync = true
pi = [pw.last, pr.first, pe.first]
if b
begin
b[cid, *pi]
Process.waitpid2(cid).last
ensure
pi.each{|fd| fd.close unless fd.closed?}
end
else
[cid, pw.last, pr.first, pe.first]
end
end
module_function :popen4
end
end
end
|
